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db49deeb | 1 | /* $OpenBSD: sftp-server.c,v 1.77 2008/02/08 23:24:07 djm Exp $ */ |
b5e300c2 | 2 | /* |
71c1910f | 3 | * Copyright (c) 2000-2004 Markus Friedl. All rights reserved. |
b5e300c2 | 4 | * |
71c1910f | 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. | |
b5e300c2 | 8 | * |
71c1910f | 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. | |
b5e300c2 | 16 | */ |
31652869 | 17 | |
b5e300c2 | 18 | #include "includes.h" |
4095f623 | 19 | |
20 | #include <sys/types.h> | |
536c14e8 | 21 | #include <sys/param.h> |
4095f623 | 22 | #include <sys/stat.h> |
e264ac72 | 23 | #ifdef HAVE_SYS_TIME_H |
24 | # include <sys/time.h> | |
25 | #endif | |
68e39d38 | 26 | |
27 | #include <dirent.h> | |
028094f4 | 28 | #include <errno.h> |
d3221cca | 29 | #include <fcntl.h> |
b1842393 | 30 | #include <pwd.h> |
ffa517a8 | 31 | #include <stdlib.h> |
cf851879 | 32 | #include <stdio.h> |
00146caa | 33 | #include <string.h> |
31652869 | 34 | #include <pwd.h> |
b0f6943a | 35 | #include <time.h> |
00146caa | 36 | #include <unistd.h> |
31652869 | 37 | #include <stdarg.h> |
b5e300c2 | 38 | |
31652869 | 39 | #include "xmalloc.h" |
b5e300c2 | 40 | #include "buffer.h" |
42f11eb2 | 41 | #include "log.h" |
fd6168c1 | 42 | #include "misc.h" |
a13880bb | 43 | #include "uidswap.h" |
b5e300c2 | 44 | |
f546c780 | 45 | #include "sftp.h" |
61e96248 | 46 | #include "sftp-common.h" |
b5e300c2 | 47 | |
48 | /* helper */ | |
f546c780 | 49 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 50 | #define get_int() buffer_get_int(&iqueue); |
51 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
b5e300c2 | 52 | |
a13880bb | 53 | /* Our verbosity */ |
54 | LogLevel log_level = SYSLOG_LEVEL_ERROR; | |
55 | ||
56 | /* Our client */ | |
57 | struct passwd *pw = NULL; | |
58 | char *client_addr = NULL; | |
260d427b | 59 | |
b5e300c2 | 60 | /* input and output queue */ |
61 | Buffer iqueue; | |
62 | Buffer oqueue; | |
63 | ||
3a7fe5ba | 64 | /* Version of client */ |
65 | int version; | |
66 | ||
d7ded285 | 67 | /* portable attributes, etc. */ |
b5e300c2 | 68 | |
b5e300c2 | 69 | typedef struct Stat Stat; |
70 | ||
61e96248 | 71 | struct Stat { |
b5e300c2 | 72 | char *name; |
73 | char *long_name; | |
74 | Attrib attrib; | |
75 | }; | |
76 | ||
396c147e | 77 | static int |
b5e300c2 | 78 | errno_to_portable(int unixerrno) |
79 | { | |
80 | int ret = 0; | |
dce9bac5 | 81 | |
b5e300c2 | 82 | switch (unixerrno) { |
83 | case 0: | |
f546c780 | 84 | ret = SSH2_FX_OK; |
b5e300c2 | 85 | break; |
86 | case ENOENT: | |
87 | case ENOTDIR: | |
88 | case EBADF: | |
89 | case ELOOP: | |
f546c780 | 90 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 91 | break; |
92 | case EPERM: | |
93 | case EACCES: | |
94 | case EFAULT: | |
f546c780 | 95 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 96 | break; |
97 | case ENAMETOOLONG: | |
98 | case EINVAL: | |
f546c780 | 99 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 100 | break; |
101 | default: | |
f546c780 | 102 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 103 | break; |
104 | } | |
105 | return ret; | |
106 | } | |
107 | ||
396c147e | 108 | static int |
b5e300c2 | 109 | flags_from_portable(int pflags) |
110 | { | |
111 | int flags = 0; | |
dce9bac5 | 112 | |
79ddf6db | 113 | if ((pflags & SSH2_FXF_READ) && |
114 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 115 | flags = O_RDWR; |
f546c780 | 116 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 117 | flags = O_RDONLY; |
f546c780 | 118 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 119 | flags = O_WRONLY; |
120 | } | |
f546c780 | 121 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 122 | flags |= O_CREAT; |
f546c780 | 123 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 124 | flags |= O_TRUNC; |
f546c780 | 125 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 126 | flags |= O_EXCL; |
127 | return flags; | |
128 | } | |
129 | ||
a13880bb | 130 | static const char * |
131 | string_from_portable(int pflags) | |
132 | { | |
133 | static char ret[128]; | |
134 | ||
135 | *ret = '\0'; | |
136 | ||
137 | #define PAPPEND(str) { \ | |
138 | if (*ret != '\0') \ | |
139 | strlcat(ret, ",", sizeof(ret)); \ | |
31652869 | 140 | strlcat(ret, str, sizeof(ret)); \ |
a13880bb | 141 | } |
142 | ||
143 | if (pflags & SSH2_FXF_READ) | |
144 | PAPPEND("READ") | |
145 | if (pflags & SSH2_FXF_WRITE) | |
146 | PAPPEND("WRITE") | |
147 | if (pflags & SSH2_FXF_CREAT) | |
148 | PAPPEND("CREATE") | |
149 | if (pflags & SSH2_FXF_TRUNC) | |
150 | PAPPEND("TRUNCATE") | |
151 | if (pflags & SSH2_FXF_EXCL) | |
152 | PAPPEND("EXCL") | |
153 | ||
154 | return ret; | |
155 | } | |
156 | ||
396c147e | 157 | static Attrib * |
b5e300c2 | 158 | get_attrib(void) |
159 | { | |
160 | return decode_attrib(&iqueue); | |
161 | } | |
162 | ||
163 | /* handle handles */ | |
164 | ||
165 | typedef struct Handle Handle; | |
166 | struct Handle { | |
167 | int use; | |
168 | DIR *dirp; | |
169 | int fd; | |
170 | char *name; | |
a13880bb | 171 | u_int64_t bytes_read, bytes_write; |
b4bbe43c | 172 | int next_unused; |
b5e300c2 | 173 | }; |
dce9bac5 | 174 | |
b5e300c2 | 175 | enum { |
176 | HANDLE_UNUSED, | |
177 | HANDLE_DIR, | |
178 | HANDLE_FILE | |
179 | }; | |
dce9bac5 | 180 | |
b4bbe43c | 181 | Handle *handles = NULL; |
182 | u_int num_handles = 0; | |
183 | int first_unused_handle = -1; | |
b5e300c2 | 184 | |
b4bbe43c | 185 | static void handle_unused(int i) |
b5e300c2 | 186 | { |
b4bbe43c | 187 | handles[i].use = HANDLE_UNUSED; |
188 | handles[i].next_unused = first_unused_handle; | |
189 | first_unused_handle = i; | |
b5e300c2 | 190 | } |
191 | ||
396c147e | 192 | static int |
b6c7b7b7 | 193 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 194 | { |
b4bbe43c | 195 | int i; |
dce9bac5 | 196 | |
b4bbe43c | 197 | if (first_unused_handle == -1) { |
198 | if (num_handles + 1 <= num_handles) | |
199 | return -1; | |
200 | num_handles++; | |
201 | handles = xrealloc(handles, num_handles, sizeof(Handle)); | |
202 | handle_unused(num_handles - 1); | |
b5e300c2 | 203 | } |
b4bbe43c | 204 | |
205 | i = first_unused_handle; | |
206 | first_unused_handle = handles[i].next_unused; | |
207 | ||
208 | handles[i].use = use; | |
209 | handles[i].dirp = dirp; | |
210 | handles[i].fd = fd; | |
211 | handles[i].name = xstrdup(name); | |
212 | handles[i].bytes_read = handles[i].bytes_write = 0; | |
213 | ||
214 | return i; | |
b5e300c2 | 215 | } |
216 | ||
396c147e | 217 | static int |
b5e300c2 | 218 | handle_is_ok(int i, int type) |
219 | { | |
b4bbe43c | 220 | return i >= 0 && (u_int)i < num_handles && handles[i].use == type; |
b5e300c2 | 221 | } |
222 | ||
396c147e | 223 | static int |
b5e300c2 | 224 | handle_to_string(int handle, char **stringp, int *hlenp) |
225 | { | |
b5e300c2 | 226 | if (stringp == NULL || hlenp == NULL) |
227 | return -1; | |
b5c334cc | 228 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 229 | put_u32(*stringp, handle); |
b5c334cc | 230 | *hlenp = sizeof(int32_t); |
b5e300c2 | 231 | return 0; |
232 | } | |
233 | ||
396c147e | 234 | static int |
b6c7b7b7 | 235 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 236 | { |
b5c334cc | 237 | int val; |
dce9bac5 | 238 | |
b5c334cc | 239 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 240 | return -1; |
51e7a012 | 241 | val = get_u32(handle); |
b5e300c2 | 242 | if (handle_is_ok(val, HANDLE_FILE) || |
243 | handle_is_ok(val, HANDLE_DIR)) | |
244 | return val; | |
245 | return -1; | |
246 | } | |
247 | ||
396c147e | 248 | static char * |
b5e300c2 | 249 | handle_to_name(int handle) |
250 | { | |
251 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
252 | handle_is_ok(handle, HANDLE_FILE)) | |
253 | return handles[handle].name; | |
254 | return NULL; | |
255 | } | |
256 | ||
396c147e | 257 | static DIR * |
b5e300c2 | 258 | handle_to_dir(int handle) |
259 | { | |
260 | if (handle_is_ok(handle, HANDLE_DIR)) | |
261 | return handles[handle].dirp; | |
262 | return NULL; | |
263 | } | |
264 | ||
396c147e | 265 | static int |
b5e300c2 | 266 | handle_to_fd(int handle) |
267 | { | |
2b87da3b | 268 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 269 | return handles[handle].fd; |
270 | return -1; | |
271 | } | |
272 | ||
a13880bb | 273 | static void |
274 | handle_update_read(int handle, ssize_t bytes) | |
275 | { | |
276 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
277 | handles[handle].bytes_read += bytes; | |
278 | } | |
279 | ||
280 | static void | |
281 | handle_update_write(int handle, ssize_t bytes) | |
282 | { | |
283 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
284 | handles[handle].bytes_write += bytes; | |
285 | } | |
286 | ||
287 | static u_int64_t | |
288 | handle_bytes_read(int handle) | |
289 | { | |
290 | if (handle_is_ok(handle, HANDLE_FILE)) | |
291 | return (handles[handle].bytes_read); | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static u_int64_t | |
296 | handle_bytes_write(int handle) | |
297 | { | |
298 | if (handle_is_ok(handle, HANDLE_FILE)) | |
299 | return (handles[handle].bytes_write); | |
300 | return 0; | |
301 | } | |
302 | ||
396c147e | 303 | static int |
b5e300c2 | 304 | handle_close(int handle) |
305 | { | |
306 | int ret = -1; | |
dce9bac5 | 307 | |
b5e300c2 | 308 | if (handle_is_ok(handle, HANDLE_FILE)) { |
309 | ret = close(handles[handle].fd); | |
3e2f2431 | 310 | xfree(handles[handle].name); |
b4bbe43c | 311 | handle_unused(handle); |
b5e300c2 | 312 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
313 | ret = closedir(handles[handle].dirp); | |
3e2f2431 | 314 | xfree(handles[handle].name); |
b4bbe43c | 315 | handle_unused(handle); |
b5e300c2 | 316 | } else { |
317 | errno = ENOENT; | |
318 | } | |
319 | return ret; | |
320 | } | |
321 | ||
a13880bb | 322 | static void |
323 | handle_log_close(int handle, char *emsg) | |
324 | { | |
325 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
326 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
327 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
328 | handle_to_name(handle), | |
23983bf9 | 329 | (unsigned long long)handle_bytes_read(handle), |
330 | (unsigned long long)handle_bytes_write(handle)); | |
a13880bb | 331 | } else { |
332 | logit("%s%sclosedir \"%s\"", | |
333 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
334 | handle_to_name(handle)); | |
335 | } | |
336 | } | |
337 | ||
338 | static void | |
339 | handle_log_exit(void) | |
340 | { | |
341 | u_int i; | |
342 | ||
b4bbe43c | 343 | for (i = 0; i < num_handles; i++) |
a13880bb | 344 | if (handles[i].use != HANDLE_UNUSED) |
345 | handle_log_close(i, "forced"); | |
346 | } | |
347 | ||
396c147e | 348 | static int |
b5e300c2 | 349 | get_handle(void) |
350 | { | |
351 | char *handle; | |
f546c780 | 352 | int val = -1; |
bcbf86ec | 353 | u_int hlen; |
dce9bac5 | 354 | |
b5e300c2 | 355 | handle = get_string(&hlen); |
f546c780 | 356 | if (hlen < 256) |
357 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 358 | xfree(handle); |
359 | return val; | |
360 | } | |
361 | ||
362 | /* send replies */ | |
363 | ||
396c147e | 364 | static void |
b5e300c2 | 365 | send_msg(Buffer *m) |
366 | { | |
367 | int mlen = buffer_len(m); | |
dce9bac5 | 368 | |
b5e300c2 | 369 | buffer_put_int(&oqueue, mlen); |
370 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
371 | buffer_consume(m, mlen); | |
372 | } | |
373 | ||
a13880bb | 374 | static const char * |
375 | status_to_message(u_int32_t status) | |
b5e300c2 | 376 | { |
3a7fe5ba | 377 | const char *status_messages[] = { |
378 | "Success", /* SSH_FX_OK */ | |
379 | "End of file", /* SSH_FX_EOF */ | |
380 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
381 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
382 | "Failure", /* SSH_FX_FAILURE */ | |
383 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
384 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
385 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
386 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
387 | "Unknown error" /* Others */ | |
388 | }; | |
a13880bb | 389 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
390 | } | |
dce9bac5 | 391 | |
a13880bb | 392 | static void |
393 | send_status(u_int32_t id, u_int32_t status) | |
394 | { | |
395 | Buffer msg; | |
396 | ||
397 | debug3("request %u: sent status %u", id, status); | |
398 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
399 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
400 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 401 | buffer_init(&msg); |
f546c780 | 402 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 403 | buffer_put_int(&msg, id); |
ca75d7de | 404 | buffer_put_int(&msg, status); |
3a7fe5ba | 405 | if (version >= 3) { |
a13880bb | 406 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 407 | buffer_put_cstring(&msg, ""); |
408 | } | |
b5e300c2 | 409 | send_msg(&msg); |
410 | buffer_free(&msg); | |
411 | } | |
396c147e | 412 | static void |
b6c7b7b7 | 413 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 414 | { |
415 | Buffer msg; | |
dce9bac5 | 416 | |
b5e300c2 | 417 | buffer_init(&msg); |
418 | buffer_put_char(&msg, type); | |
419 | buffer_put_int(&msg, id); | |
420 | buffer_put_string(&msg, data, dlen); | |
421 | send_msg(&msg); | |
422 | buffer_free(&msg); | |
423 | } | |
424 | ||
396c147e | 425 | static void |
b6c7b7b7 | 426 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 427 | { |
a13880bb | 428 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 429 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 430 | } |
431 | ||
396c147e | 432 | static void |
b5e300c2 | 433 | send_handle(u_int32_t id, int handle) |
434 | { | |
435 | char *string; | |
436 | int hlen; | |
dce9bac5 | 437 | |
b5e300c2 | 438 | handle_to_string(handle, &string, &hlen); |
a13880bb | 439 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 440 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 441 | xfree(string); |
442 | } | |
443 | ||
396c147e | 444 | static void |
b6c7b7b7 | 445 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 446 | { |
447 | Buffer msg; | |
448 | int i; | |
dce9bac5 | 449 | |
b5e300c2 | 450 | buffer_init(&msg); |
f546c780 | 451 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 452 | buffer_put_int(&msg, id); |
453 | buffer_put_int(&msg, count); | |
a13880bb | 454 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 455 | for (i = 0; i < count; i++) { |
456 | buffer_put_cstring(&msg, stats[i].name); | |
457 | buffer_put_cstring(&msg, stats[i].long_name); | |
458 | encode_attrib(&msg, &stats[i].attrib); | |
459 | } | |
460 | send_msg(&msg); | |
461 | buffer_free(&msg); | |
462 | } | |
463 | ||
396c147e | 464 | static void |
b6c7b7b7 | 465 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 466 | { |
467 | Buffer msg; | |
dce9bac5 | 468 | |
a13880bb | 469 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 470 | buffer_init(&msg); |
f546c780 | 471 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 472 | buffer_put_int(&msg, id); |
473 | encode_attrib(&msg, a); | |
474 | send_msg(&msg); | |
475 | buffer_free(&msg); | |
476 | } | |
477 | ||
478 | /* parse incoming */ | |
479 | ||
396c147e | 480 | static void |
b5e300c2 | 481 | process_init(void) |
482 | { | |
483 | Buffer msg; | |
b5e300c2 | 484 | |
802d93bb | 485 | version = get_int(); |
a13880bb | 486 | verbose("received client version %d", version); |
b5e300c2 | 487 | buffer_init(&msg); |
f546c780 | 488 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
489 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 490 | send_msg(&msg); |
491 | buffer_free(&msg); | |
492 | } | |
493 | ||
396c147e | 494 | static void |
b5e300c2 | 495 | process_open(void) |
496 | { | |
497 | u_int32_t id, pflags; | |
498 | Attrib *a; | |
499 | char *name; | |
f546c780 | 500 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 501 | |
502 | id = get_int(); | |
503 | name = get_string(NULL); | |
f546c780 | 504 | pflags = get_int(); /* portable flags */ |
26ddd377 | 505 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 506 | a = get_attrib(); |
507 | flags = flags_from_portable(pflags); | |
f546c780 | 508 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 509 | logit("open \"%s\" flags %s mode 0%o", |
510 | name, string_from_portable(pflags), mode); | |
b5e300c2 | 511 | fd = open(name, flags, mode); |
512 | if (fd < 0) { | |
513 | status = errno_to_portable(errno); | |
514 | } else { | |
3e2f2431 | 515 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 516 | if (handle < 0) { |
517 | close(fd); | |
518 | } else { | |
519 | send_handle(id, handle); | |
f546c780 | 520 | status = SSH2_FX_OK; |
b5e300c2 | 521 | } |
522 | } | |
f546c780 | 523 | if (status != SSH2_FX_OK) |
b5e300c2 | 524 | send_status(id, status); |
525 | xfree(name); | |
526 | } | |
527 | ||
396c147e | 528 | static void |
b5e300c2 | 529 | process_close(void) |
530 | { | |
531 | u_int32_t id; | |
f546c780 | 532 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 533 | |
534 | id = get_int(); | |
535 | handle = get_handle(); | |
a13880bb | 536 | debug3("request %u: close handle %u", id, handle); |
537 | handle_log_close(handle, NULL); | |
b5e300c2 | 538 | ret = handle_close(handle); |
f546c780 | 539 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 540 | send_status(id, status); |
541 | } | |
542 | ||
396c147e | 543 | static void |
b5e300c2 | 544 | process_read(void) |
545 | { | |
546 | char buf[64*1024]; | |
f546c780 | 547 | u_int32_t id, len; |
548 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 549 | u_int64_t off; |
550 | ||
551 | id = get_int(); | |
552 | handle = get_handle(); | |
f546c780 | 553 | off = get_int64(); |
b5e300c2 | 554 | len = get_int(); |
555 | ||
a13880bb | 556 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
557 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 558 | if (len > sizeof buf) { |
559 | len = sizeof buf; | |
a13880bb | 560 | debug2("read change len %d", len); |
b5e300c2 | 561 | } |
562 | fd = handle_to_fd(handle); | |
563 | if (fd >= 0) { | |
564 | if (lseek(fd, off, SEEK_SET) < 0) { | |
565 | error("process_read: seek failed"); | |
566 | status = errno_to_portable(errno); | |
567 | } else { | |
568 | ret = read(fd, buf, len); | |
569 | if (ret < 0) { | |
570 | status = errno_to_portable(errno); | |
571 | } else if (ret == 0) { | |
f546c780 | 572 | status = SSH2_FX_EOF; |
b5e300c2 | 573 | } else { |
574 | send_data(id, buf, ret); | |
f546c780 | 575 | status = SSH2_FX_OK; |
a13880bb | 576 | handle_update_read(handle, ret); |
b5e300c2 | 577 | } |
578 | } | |
579 | } | |
f546c780 | 580 | if (status != SSH2_FX_OK) |
b5e300c2 | 581 | send_status(id, status); |
582 | } | |
583 | ||
396c147e | 584 | static void |
b5e300c2 | 585 | process_write(void) |
586 | { | |
f546c780 | 587 | u_int32_t id; |
b5e300c2 | 588 | u_int64_t off; |
bcbf86ec | 589 | u_int len; |
f546c780 | 590 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 591 | char *data; |
592 | ||
593 | id = get_int(); | |
594 | handle = get_handle(); | |
f546c780 | 595 | off = get_int64(); |
b5e300c2 | 596 | data = get_string(&len); |
597 | ||
a13880bb | 598 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
599 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 600 | fd = handle_to_fd(handle); |
601 | if (fd >= 0) { | |
602 | if (lseek(fd, off, SEEK_SET) < 0) { | |
603 | status = errno_to_portable(errno); | |
604 | error("process_write: seek failed"); | |
605 | } else { | |
606 | /* XXX ATOMICIO ? */ | |
607 | ret = write(fd, data, len); | |
2ceb8101 | 608 | if (ret < 0) { |
b5e300c2 | 609 | error("process_write: write failed"); |
610 | status = errno_to_portable(errno); | |
2ceb8101 | 611 | } else if ((size_t)ret == len) { |
f546c780 | 612 | status = SSH2_FX_OK; |
a13880bb | 613 | handle_update_write(handle, ret); |
b5e300c2 | 614 | } else { |
a13880bb | 615 | debug2("nothing at all written"); |
b5e300c2 | 616 | } |
617 | } | |
618 | } | |
619 | send_status(id, status); | |
620 | xfree(data); | |
621 | } | |
622 | ||
396c147e | 623 | static void |
b5e300c2 | 624 | process_do_stat(int do_lstat) |
625 | { | |
b5c334cc | 626 | Attrib a; |
b5e300c2 | 627 | struct stat st; |
628 | u_int32_t id; | |
629 | char *name; | |
f546c780 | 630 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 631 | |
632 | id = get_int(); | |
633 | name = get_string(NULL); | |
a13880bb | 634 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
635 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 636 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
637 | if (ret < 0) { | |
638 | status = errno_to_portable(errno); | |
639 | } else { | |
b5c334cc | 640 | stat_to_attrib(&st, &a); |
641 | send_attrib(id, &a); | |
f546c780 | 642 | status = SSH2_FX_OK; |
b5e300c2 | 643 | } |
f546c780 | 644 | if (status != SSH2_FX_OK) |
b5e300c2 | 645 | send_status(id, status); |
646 | xfree(name); | |
647 | } | |
648 | ||
396c147e | 649 | static void |
b5e300c2 | 650 | process_stat(void) |
651 | { | |
652 | process_do_stat(0); | |
653 | } | |
654 | ||
396c147e | 655 | static void |
b5e300c2 | 656 | process_lstat(void) |
657 | { | |
658 | process_do_stat(1); | |
659 | } | |
660 | ||
396c147e | 661 | static void |
b5e300c2 | 662 | process_fstat(void) |
663 | { | |
b5c334cc | 664 | Attrib a; |
b5e300c2 | 665 | struct stat st; |
666 | u_int32_t id; | |
f546c780 | 667 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 668 | |
669 | id = get_int(); | |
670 | handle = get_handle(); | |
a13880bb | 671 | debug("request %u: fstat \"%s\" (handle %u)", |
672 | id, handle_to_name(handle), handle); | |
b5e300c2 | 673 | fd = handle_to_fd(handle); |
9a24ac07 | 674 | if (fd >= 0) { |
b5e300c2 | 675 | ret = fstat(fd, &st); |
676 | if (ret < 0) { | |
677 | status = errno_to_portable(errno); | |
678 | } else { | |
b5c334cc | 679 | stat_to_attrib(&st, &a); |
680 | send_attrib(id, &a); | |
f546c780 | 681 | status = SSH2_FX_OK; |
b5e300c2 | 682 | } |
683 | } | |
f546c780 | 684 | if (status != SSH2_FX_OK) |
b5e300c2 | 685 | send_status(id, status); |
686 | } | |
687 | ||
396c147e | 688 | static struct timeval * |
b6c7b7b7 | 689 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 690 | { |
691 | static struct timeval tv[2]; | |
dce9bac5 | 692 | |
b5e300c2 | 693 | tv[0].tv_sec = a->atime; |
694 | tv[0].tv_usec = 0; | |
695 | tv[1].tv_sec = a->mtime; | |
696 | tv[1].tv_usec = 0; | |
697 | return tv; | |
698 | } | |
699 | ||
396c147e | 700 | static void |
b5e300c2 | 701 | process_setstat(void) |
702 | { | |
703 | Attrib *a; | |
704 | u_int32_t id; | |
705 | char *name; | |
9906a836 | 706 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 707 | |
708 | id = get_int(); | |
709 | name = get_string(NULL); | |
710 | a = get_attrib(); | |
a13880bb | 711 | debug("request %u: setstat name \"%s\"", id, name); |
cb476289 | 712 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 713 | logit("set \"%s\" size %llu", |
714 | name, (unsigned long long)a->size); | |
cb476289 | 715 | ret = truncate(name, a->size); |
716 | if (ret == -1) | |
717 | status = errno_to_portable(errno); | |
718 | } | |
f546c780 | 719 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 720 | logit("set \"%s\" mode %04o", name, a->perm); |
b5e300c2 | 721 | ret = chmod(name, a->perm & 0777); |
722 | if (ret == -1) | |
723 | status = errno_to_portable(errno); | |
724 | } | |
f546c780 | 725 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 726 | char buf[64]; |
727 | time_t t = a->mtime; | |
728 | ||
729 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
730 | localtime(&t)); | |
731 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 732 | ret = utimes(name, attrib_to_tv(a)); |
733 | if (ret == -1) | |
734 | status = errno_to_portable(errno); | |
735 | } | |
408ba72f | 736 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 737 | logit("set \"%s\" owner %lu group %lu", name, |
738 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 739 | ret = chown(name, a->uid, a->gid); |
740 | if (ret == -1) | |
741 | status = errno_to_portable(errno); | |
742 | } | |
b5e300c2 | 743 | send_status(id, status); |
744 | xfree(name); | |
745 | } | |
746 | ||
396c147e | 747 | static void |
b5e300c2 | 748 | process_fsetstat(void) |
749 | { | |
750 | Attrib *a; | |
751 | u_int32_t id; | |
752 | int handle, fd, ret; | |
f546c780 | 753 | int status = SSH2_FX_OK; |
16e538d4 | 754 | |
b5e300c2 | 755 | id = get_int(); |
756 | handle = get_handle(); | |
757 | a = get_attrib(); | |
a13880bb | 758 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 759 | fd = handle_to_fd(handle); |
a13880bb | 760 | if (fd < 0) { |
f546c780 | 761 | status = SSH2_FX_FAILURE; |
b5e300c2 | 762 | } else { |
a13880bb | 763 | char *name = handle_to_name(handle); |
764 | ||
cb476289 | 765 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
23983bf9 | 766 | logit("set \"%s\" size %llu", |
767 | name, (unsigned long long)a->size); | |
cb476289 | 768 | ret = ftruncate(fd, a->size); |
769 | if (ret == -1) | |
770 | status = errno_to_portable(errno); | |
771 | } | |
f546c780 | 772 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 773 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 774 | #ifdef HAVE_FCHMOD |
b5e300c2 | 775 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 776 | #else |
c33f0b36 | 777 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 778 | #endif |
b5e300c2 | 779 | if (ret == -1) |
780 | status = errno_to_portable(errno); | |
781 | } | |
f546c780 | 782 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 783 | char buf[64]; |
784 | time_t t = a->mtime; | |
785 | ||
786 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
787 | localtime(&t)); | |
788 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 789 | #ifdef HAVE_FUTIMES |
790 | ret = futimes(fd, attrib_to_tv(a)); | |
791 | #else | |
792 | ret = utimes(name, attrib_to_tv(a)); | |
793 | #endif | |
794 | if (ret == -1) | |
795 | status = errno_to_portable(errno); | |
796 | } | |
408ba72f | 797 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 798 | logit("set \"%s\" owner %lu group %lu", name, |
799 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 800 | #ifdef HAVE_FCHOWN |
408ba72f | 801 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 802 | #else |
803 | ret = chown(name, a->uid, a->gid); | |
804 | #endif | |
408ba72f | 805 | if (ret == -1) |
806 | status = errno_to_portable(errno); | |
807 | } | |
b5e300c2 | 808 | } |
809 | send_status(id, status); | |
810 | } | |
811 | ||
396c147e | 812 | static void |
b5e300c2 | 813 | process_opendir(void) |
814 | { | |
815 | DIR *dirp = NULL; | |
816 | char *path; | |
f546c780 | 817 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 818 | u_int32_t id; |
819 | ||
820 | id = get_int(); | |
821 | path = get_string(NULL); | |
a13880bb | 822 | debug3("request %u: opendir", id); |
823 | logit("opendir \"%s\"", path); | |
2b87da3b | 824 | dirp = opendir(path); |
b5e300c2 | 825 | if (dirp == NULL) { |
826 | status = errno_to_portable(errno); | |
827 | } else { | |
3e2f2431 | 828 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 829 | if (handle < 0) { |
830 | closedir(dirp); | |
831 | } else { | |
832 | send_handle(id, handle); | |
f546c780 | 833 | status = SSH2_FX_OK; |
b5e300c2 | 834 | } |
2b87da3b | 835 | |
b5e300c2 | 836 | } |
f546c780 | 837 | if (status != SSH2_FX_OK) |
b5e300c2 | 838 | send_status(id, status); |
839 | xfree(path); | |
840 | } | |
841 | ||
396c147e | 842 | static void |
b5e300c2 | 843 | process_readdir(void) |
844 | { | |
845 | DIR *dirp; | |
846 | struct dirent *dp; | |
847 | char *path; | |
848 | int handle; | |
849 | u_int32_t id; | |
850 | ||
851 | id = get_int(); | |
852 | handle = get_handle(); | |
a13880bb | 853 | debug("request %u: readdir \"%s\" (handle %d)", id, |
854 | handle_to_name(handle), handle); | |
b5e300c2 | 855 | dirp = handle_to_dir(handle); |
856 | path = handle_to_name(handle); | |
857 | if (dirp == NULL || path == NULL) { | |
f546c780 | 858 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 859 | } else { |
b5e300c2 | 860 | struct stat st; |
a13880bb | 861 | char pathname[MAXPATHLEN]; |
b5e300c2 | 862 | Stat *stats; |
863 | int nstats = 10, count = 0, i; | |
9906a836 | 864 | |
52e3daed | 865 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 866 | while ((dp = readdir(dirp)) != NULL) { |
867 | if (count >= nstats) { | |
868 | nstats *= 2; | |
c5d10563 | 869 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 870 | } |
871 | /* XXX OVERFLOW ? */ | |
88690211 | 872 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
873 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 874 | if (lstat(pathname, &st) < 0) |
875 | continue; | |
b5c334cc | 876 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 877 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 878 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 879 | count++; |
880 | /* send up to 100 entries in one message */ | |
b5c334cc | 881 | /* XXX check packet size instead */ |
b5e300c2 | 882 | if (count == 100) |
883 | break; | |
884 | } | |
f546c780 | 885 | if (count > 0) { |
886 | send_names(id, count, stats); | |
184eed6a | 887 | for (i = 0; i < count; i++) { |
f546c780 | 888 | xfree(stats[i].name); |
889 | xfree(stats[i].long_name); | |
890 | } | |
891 | } else { | |
892 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 893 | } |
894 | xfree(stats); | |
895 | } | |
896 | } | |
897 | ||
396c147e | 898 | static void |
b5e300c2 | 899 | process_remove(void) |
900 | { | |
901 | char *name; | |
902 | u_int32_t id; | |
f546c780 | 903 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 904 | int ret; |
905 | ||
906 | id = get_int(); | |
907 | name = get_string(NULL); | |
a13880bb | 908 | debug3("request %u: remove", id); |
909 | logit("remove name \"%s\"", name); | |
67b0facb | 910 | ret = unlink(name); |
f546c780 | 911 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 912 | send_status(id, status); |
913 | xfree(name); | |
914 | } | |
915 | ||
396c147e | 916 | static void |
b5e300c2 | 917 | process_mkdir(void) |
918 | { | |
919 | Attrib *a; | |
920 | u_int32_t id; | |
921 | char *name; | |
f546c780 | 922 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 923 | |
924 | id = get_int(); | |
925 | name = get_string(NULL); | |
926 | a = get_attrib(); | |
f546c780 | 927 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
928 | a->perm & 0777 : 0777; | |
a13880bb | 929 | debug3("request %u: mkdir", id); |
930 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
b5e300c2 | 931 | ret = mkdir(name, mode); |
f546c780 | 932 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 933 | send_status(id, status); |
934 | xfree(name); | |
935 | } | |
936 | ||
396c147e | 937 | static void |
b5e300c2 | 938 | process_rmdir(void) |
939 | { | |
940 | u_int32_t id; | |
941 | char *name; | |
942 | int ret, status; | |
943 | ||
944 | id = get_int(); | |
945 | name = get_string(NULL); | |
a13880bb | 946 | debug3("request %u: rmdir", id); |
947 | logit("rmdir name \"%s\"", name); | |
b5e300c2 | 948 | ret = rmdir(name); |
f546c780 | 949 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 950 | send_status(id, status); |
951 | xfree(name); | |
952 | } | |
953 | ||
396c147e | 954 | static void |
b5e300c2 | 955 | process_realpath(void) |
956 | { | |
957 | char resolvedname[MAXPATHLEN]; | |
958 | u_int32_t id; | |
959 | char *path; | |
960 | ||
961 | id = get_int(); | |
962 | path = get_string(NULL); | |
6b523bae | 963 | if (path[0] == '\0') { |
964 | xfree(path); | |
965 | path = xstrdup("."); | |
966 | } | |
a13880bb | 967 | debug3("request %u: realpath", id); |
968 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 969 | if (realpath(path, resolvedname) == NULL) { |
970 | send_status(id, errno_to_portable(errno)); | |
971 | } else { | |
972 | Stat s; | |
973 | attrib_clear(&s.attrib); | |
974 | s.name = s.long_name = resolvedname; | |
975 | send_names(id, 1, &s); | |
976 | } | |
977 | xfree(path); | |
978 | } | |
979 | ||
396c147e | 980 | static void |
b5e300c2 | 981 | process_rename(void) |
982 | { | |
983 | u_int32_t id; | |
984 | char *oldpath, *newpath; | |
f2f28f1f | 985 | int status; |
fd77a40f | 986 | struct stat sb; |
b5e300c2 | 987 | |
988 | id = get_int(); | |
989 | oldpath = get_string(NULL); | |
990 | newpath = get_string(NULL); | |
a13880bb | 991 | debug3("request %u: rename", id); |
992 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 993 | status = SSH2_FX_FAILURE; |
994 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 995 | status = errno_to_portable(errno); |
fd77a40f | 996 | else if (S_ISREG(sb.st_mode)) { |
997 | /* Race-free rename of regular files */ | |
dc5888bf | 998 | if (link(oldpath, newpath) == -1) { |
cd698186 | 999 | if (errno == EOPNOTSUPP |
1000 | #ifdef LINK_OPNOTSUPP_ERRNO | |
1001 | || errno == LINK_OPNOTSUPP_ERRNO | |
1002 | #endif | |
1003 | ) { | |
dc5888bf | 1004 | struct stat st; |
1005 | ||
1006 | /* | |
1007 | * fs doesn't support links, so fall back to | |
1008 | * stat+rename. This is racy. | |
1009 | */ | |
1010 | if (stat(newpath, &st) == -1) { | |
1011 | if (rename(oldpath, newpath) == -1) | |
1012 | status = | |
1013 | errno_to_portable(errno); | |
1014 | else | |
1015 | status = SSH2_FX_OK; | |
1016 | } | |
1017 | } else { | |
1018 | status = errno_to_portable(errno); | |
1019 | } | |
1020 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 1021 | status = errno_to_portable(errno); |
1022 | /* clean spare link */ | |
1023 | unlink(newpath); | |
1024 | } else | |
1025 | status = SSH2_FX_OK; | |
1026 | } else if (stat(newpath, &sb) == -1) { | |
1027 | if (rename(oldpath, newpath) == -1) | |
1028 | status = errno_to_portable(errno); | |
1029 | else | |
1030 | status = SSH2_FX_OK; | |
1031 | } | |
b5e300c2 | 1032 | send_status(id, status); |
1033 | xfree(oldpath); | |
1034 | xfree(newpath); | |
1035 | } | |
1036 | ||
396c147e | 1037 | static void |
3a7fe5ba | 1038 | process_readlink(void) |
1039 | { | |
1040 | u_int32_t id; | |
362df52e | 1041 | int len; |
ca75d7de | 1042 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1043 | char *path; |
1044 | ||
1045 | id = get_int(); | |
1046 | path = get_string(NULL); | |
a13880bb | 1047 | debug3("request %u: readlink", id); |
1048 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1049 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1050 | send_status(id, errno_to_portable(errno)); |
1051 | else { | |
1052 | Stat s; | |
184eed6a | 1053 | |
ca75d7de | 1054 | buf[len] = '\0'; |
3a7fe5ba | 1055 | attrib_clear(&s.attrib); |
ca75d7de | 1056 | s.name = s.long_name = buf; |
3a7fe5ba | 1057 | send_names(id, 1, &s); |
1058 | } | |
1059 | xfree(path); | |
1060 | } | |
1061 | ||
396c147e | 1062 | static void |
3a7fe5ba | 1063 | process_symlink(void) |
1064 | { | |
1065 | u_int32_t id; | |
3a7fe5ba | 1066 | char *oldpath, *newpath; |
f2f28f1f | 1067 | int ret, status; |
3a7fe5ba | 1068 | |
1069 | id = get_int(); | |
1070 | oldpath = get_string(NULL); | |
1071 | newpath = get_string(NULL); | |
a13880bb | 1072 | debug3("request %u: symlink", id); |
1073 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1074 | /* this will fail if 'newpath' exists */ |
1075 | ret = symlink(oldpath, newpath); | |
1076 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 1077 | send_status(id, status); |
1078 | xfree(oldpath); | |
1079 | xfree(newpath); | |
1080 | } | |
1081 | ||
396c147e | 1082 | static void |
f546c780 | 1083 | process_extended(void) |
1084 | { | |
1085 | u_int32_t id; | |
1086 | char *request; | |
1087 | ||
1088 | id = get_int(); | |
1089 | request = get_string(NULL); | |
1090 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
1091 | xfree(request); | |
1092 | } | |
b5e300c2 | 1093 | |
1094 | /* stolen from ssh-agent */ | |
1095 | ||
396c147e | 1096 | static void |
b5e300c2 | 1097 | process(void) |
1098 | { | |
1e3b8b07 | 1099 | u_int msg_len; |
9b4ac641 | 1100 | u_int buf_len; |
1101 | u_int consumed; | |
1e3b8b07 | 1102 | u_int type; |
1103 | u_char *cp; | |
b5e300c2 | 1104 | |
9b4ac641 | 1105 | buf_len = buffer_len(&iqueue); |
1106 | if (buf_len < 5) | |
b5e300c2 | 1107 | return; /* Incomplete message. */ |
20905a8e | 1108 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1109 | msg_len = get_u32(cp); |
3eee3b86 | 1110 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1111 | error("bad message from %s local user %s", |
1112 | client_addr, pw->pw_name); | |
c33ba17e | 1113 | sftp_server_cleanup_exit(11); |
b5e300c2 | 1114 | } |
9b4ac641 | 1115 | if (buf_len < msg_len + 4) |
b5e300c2 | 1116 | return; |
1117 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1118 | buf_len -= 4; |
b5e300c2 | 1119 | type = buffer_get_char(&iqueue); |
1120 | switch (type) { | |
f546c780 | 1121 | case SSH2_FXP_INIT: |
b5e300c2 | 1122 | process_init(); |
1123 | break; | |
f546c780 | 1124 | case SSH2_FXP_OPEN: |
b5e300c2 | 1125 | process_open(); |
1126 | break; | |
f546c780 | 1127 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1128 | process_close(); |
1129 | break; | |
f546c780 | 1130 | case SSH2_FXP_READ: |
b5e300c2 | 1131 | process_read(); |
1132 | break; | |
f546c780 | 1133 | case SSH2_FXP_WRITE: |
b5e300c2 | 1134 | process_write(); |
1135 | break; | |
f546c780 | 1136 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1137 | process_lstat(); |
1138 | break; | |
f546c780 | 1139 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1140 | process_fstat(); |
1141 | break; | |
f546c780 | 1142 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1143 | process_setstat(); |
1144 | break; | |
f546c780 | 1145 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1146 | process_fsetstat(); |
1147 | break; | |
f546c780 | 1148 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1149 | process_opendir(); |
1150 | break; | |
f546c780 | 1151 | case SSH2_FXP_READDIR: |
b5e300c2 | 1152 | process_readdir(); |
1153 | break; | |
f546c780 | 1154 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1155 | process_remove(); |
1156 | break; | |
f546c780 | 1157 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1158 | process_mkdir(); |
1159 | break; | |
f546c780 | 1160 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1161 | process_rmdir(); |
1162 | break; | |
f546c780 | 1163 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1164 | process_realpath(); |
1165 | break; | |
f546c780 | 1166 | case SSH2_FXP_STAT: |
b5e300c2 | 1167 | process_stat(); |
1168 | break; | |
f546c780 | 1169 | case SSH2_FXP_RENAME: |
b5e300c2 | 1170 | process_rename(); |
1171 | break; | |
3a7fe5ba | 1172 | case SSH2_FXP_READLINK: |
1173 | process_readlink(); | |
1174 | break; | |
1175 | case SSH2_FXP_SYMLINK: | |
1176 | process_symlink(); | |
1177 | break; | |
f546c780 | 1178 | case SSH2_FXP_EXTENDED: |
1179 | process_extended(); | |
1180 | break; | |
b5e300c2 | 1181 | default: |
1182 | error("Unknown message %d", type); | |
1183 | break; | |
1184 | } | |
9b4ac641 | 1185 | /* discard the remaining bytes from the current packet */ |
c33ba17e | 1186 | if (buf_len < buffer_len(&iqueue)) { |
1187 | error("iqueue grew unexpectedly"); | |
1188 | sftp_server_cleanup_exit(255); | |
1189 | } | |
9b4ac641 | 1190 | consumed = buf_len - buffer_len(&iqueue); |
c33ba17e | 1191 | if (msg_len < consumed) { |
1192 | error("msg_len %d < consumed %d", msg_len, consumed); | |
1193 | sftp_server_cleanup_exit(255); | |
1194 | } | |
9b4ac641 | 1195 | if (msg_len > consumed) |
1196 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1197 | } |
1198 | ||
a13880bb | 1199 | /* Cleanup handler that logs active handles upon normal exit */ |
1200 | void | |
c33ba17e | 1201 | sftp_server_cleanup_exit(int i) |
a13880bb | 1202 | { |
1203 | if (pw != NULL && client_addr != NULL) { | |
1204 | handle_log_exit(); | |
1205 | logit("session closed for local user %s from [%s]", | |
1206 | pw->pw_name, client_addr); | |
1207 | } | |
1208 | _exit(i); | |
1209 | } | |
1210 | ||
1211 | static void | |
c33ba17e | 1212 | sftp_server_usage(void) |
a13880bb | 1213 | { |
1214 | extern char *__progname; | |
1215 | ||
1216 | fprintf(stderr, | |
1217 | "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname); | |
1218 | exit(1); | |
1219 | } | |
1220 | ||
b5e300c2 | 1221 | int |
db49deeb | 1222 | sftp_server_main(int argc, char **argv, struct passwd *user_pw) |
b5e300c2 | 1223 | { |
c8d75031 | 1224 | fd_set *rset, *wset; |
a13880bb | 1225 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1226 | ssize_t len, olen, set_size; |
a13880bb | 1227 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
72dea2d9 | 1228 | char *cp, buf[4*4096]; |
a13880bb | 1229 | |
a13880bb | 1230 | extern char *optarg; |
1231 | extern char *__progname; | |
b5e300c2 | 1232 | |
fd6168c1 | 1233 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1234 | sanitise_stdfd(); | |
1235 | ||
a13880bb | 1236 | __progname = ssh_get_progname(argv[0]); |
1237 | log_init(__progname, log_level, log_facility, log_stderr); | |
1238 | ||
1239 | while (!skipargs && (ch = getopt(argc, argv, "C:f:l:che")) != -1) { | |
1240 | switch (ch) { | |
1241 | case 'c': | |
1242 | /* | |
1243 | * Ignore all arguments if we are invoked as a | |
31652869 | 1244 | * shell using "sftp-server -c command" |
a13880bb | 1245 | */ |
1246 | skipargs = 1; | |
1247 | break; | |
1248 | case 'e': | |
1249 | log_stderr = 1; | |
1250 | break; | |
1251 | case 'l': | |
1252 | log_level = log_level_number(optarg); | |
1253 | if (log_level == SYSLOG_LEVEL_NOT_SET) | |
1254 | error("Invalid log level \"%s\"", optarg); | |
1255 | break; | |
1256 | case 'f': | |
1257 | log_facility = log_facility_number(optarg); | |
f8f7ecf5 | 1258 | if (log_facility == SYSLOG_FACILITY_NOT_SET) |
a13880bb | 1259 | error("Invalid log facility \"%s\"", optarg); |
1260 | break; | |
1261 | case 'h': | |
1262 | default: | |
c33ba17e | 1263 | sftp_server_usage(); |
a13880bb | 1264 | } |
1265 | } | |
61b3a2bc | 1266 | |
a13880bb | 1267 | log_init(__progname, log_level, log_facility, log_stderr); |
b5e300c2 | 1268 | |
a13880bb | 1269 | if ((cp = getenv("SSH_CONNECTION")) != NULL) { |
1270 | client_addr = xstrdup(cp); | |
c33ba17e | 1271 | if ((cp = strchr(client_addr, ' ')) == NULL) { |
1272 | error("Malformed SSH_CONNECTION variable: \"%s\"", | |
a13880bb | 1273 | getenv("SSH_CONNECTION")); |
c33ba17e | 1274 | sftp_server_cleanup_exit(255); |
1275 | } | |
a13880bb | 1276 | *cp = '\0'; |
1277 | } else | |
1278 | client_addr = xstrdup("UNKNOWN"); | |
1279 | ||
db49deeb | 1280 | pw = pwcopy(user_pw); |
a13880bb | 1281 | |
1282 | logit("session opened for local user %s from [%s]", | |
1283 | pw->pw_name, client_addr); | |
1284 | ||
b5e300c2 | 1285 | in = dup(STDIN_FILENO); |
1286 | out = dup(STDOUT_FILENO); | |
1287 | ||
fe56c12b | 1288 | #ifdef HAVE_CYGWIN |
1289 | setmode(in, O_BINARY); | |
1290 | setmode(out, O_BINARY); | |
1291 | #endif | |
1292 | ||
b5e300c2 | 1293 | max = 0; |
1294 | if (in > max) | |
1295 | max = in; | |
1296 | if (out > max) | |
1297 | max = out; | |
1298 | ||
1299 | buffer_init(&iqueue); | |
1300 | buffer_init(&oqueue); | |
1301 | ||
c8d75031 | 1302 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1303 | rset = (fd_set *)xmalloc(set_size); | |
1304 | wset = (fd_set *)xmalloc(set_size); | |
1305 | ||
b5e300c2 | 1306 | for (;;) { |
c8d75031 | 1307 | memset(rset, 0, set_size); |
1308 | memset(wset, 0, set_size); | |
b5e300c2 | 1309 | |
72dea2d9 | 1310 | /* |
1311 | * Ensure that we can read a full buffer and handle | |
1312 | * the worst-case length packet it can generate, | |
1313 | * otherwise apply backpressure by stopping reads. | |
1314 | */ | |
1315 | if (buffer_check_alloc(&iqueue, sizeof(buf)) && | |
1316 | buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1317 | FD_SET(in, rset); | |
1318 | ||
b5e300c2 | 1319 | olen = buffer_len(&oqueue); |
1320 | if (olen > 0) | |
c8d75031 | 1321 | FD_SET(out, wset); |
b5e300c2 | 1322 | |
c8d75031 | 1323 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1324 | if (errno == EINTR) |
1325 | continue; | |
a13880bb | 1326 | error("select: %s", strerror(errno)); |
c33ba17e | 1327 | sftp_server_cleanup_exit(2); |
b5e300c2 | 1328 | } |
1329 | ||
1330 | /* copy stdin to iqueue */ | |
c8d75031 | 1331 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1332 | len = read(in, buf, sizeof buf); |
1333 | if (len == 0) { | |
1334 | debug("read eof"); | |
c33ba17e | 1335 | sftp_server_cleanup_exit(0); |
b5e300c2 | 1336 | } else if (len < 0) { |
a13880bb | 1337 | error("read: %s", strerror(errno)); |
c33ba17e | 1338 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1339 | } else { |
1340 | buffer_append(&iqueue, buf, len); | |
1341 | } | |
1342 | } | |
1343 | /* send oqueue to stdout */ | |
c8d75031 | 1344 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1345 | len = write(out, buffer_ptr(&oqueue), olen); |
1346 | if (len < 0) { | |
a13880bb | 1347 | error("write: %s", strerror(errno)); |
c33ba17e | 1348 | sftp_server_cleanup_exit(1); |
b5e300c2 | 1349 | } else { |
1350 | buffer_consume(&oqueue, len); | |
1351 | } | |
1352 | } | |
72dea2d9 | 1353 | |
1354 | /* | |
1355 | * Process requests from client if we can fit the results | |
1356 | * into the output buffer, otherwise stop processing input | |
1357 | * and let the output queue drain. | |
1358 | */ | |
1359 | if (buffer_check_alloc(&oqueue, SFTP_MAX_MSG_LENGTH)) | |
1360 | process(); | |
b5e300c2 | 1361 | } |
1362 | } |