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028094f4 | 1 | /* $OpenBSD: sftp-server.c,v 1.62 2006/07/11 20:07:25 stevesk 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 | */ |
17 | #include "includes.h" | |
4095f623 | 18 | |
19 | #include <sys/types.h> | |
20 | #include <sys/stat.h> | |
68e39d38 | 21 | |
22 | #include <dirent.h> | |
028094f4 | 23 | #include <errno.h> |
d3221cca | 24 | #include <fcntl.h> |
b1842393 | 25 | #include <pwd.h> |
b5e300c2 | 26 | |
b5e300c2 | 27 | #include "buffer.h" |
28 | #include "bufaux.h" | |
42f11eb2 | 29 | #include "log.h" |
b5e300c2 | 30 | #include "xmalloc.h" |
fd6168c1 | 31 | #include "misc.h" |
a13880bb | 32 | #include "uidswap.h" |
b5e300c2 | 33 | |
f546c780 | 34 | #include "sftp.h" |
61e96248 | 35 | #include "sftp-common.h" |
b5e300c2 | 36 | |
37 | /* helper */ | |
f546c780 | 38 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 39 | #define get_int() buffer_get_int(&iqueue); |
40 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
b5e300c2 | 41 | |
a13880bb | 42 | /* Our verbosity */ |
43 | LogLevel log_level = SYSLOG_LEVEL_ERROR; | |
44 | ||
45 | /* Our client */ | |
46 | struct passwd *pw = NULL; | |
47 | char *client_addr = NULL; | |
260d427b | 48 | |
b5e300c2 | 49 | /* input and output queue */ |
50 | Buffer iqueue; | |
51 | Buffer oqueue; | |
52 | ||
3a7fe5ba | 53 | /* Version of client */ |
54 | int version; | |
55 | ||
d7ded285 | 56 | /* portable attributes, etc. */ |
b5e300c2 | 57 | |
b5e300c2 | 58 | typedef struct Stat Stat; |
59 | ||
61e96248 | 60 | struct Stat { |
b5e300c2 | 61 | char *name; |
62 | char *long_name; | |
63 | Attrib attrib; | |
64 | }; | |
65 | ||
396c147e | 66 | static int |
b5e300c2 | 67 | errno_to_portable(int unixerrno) |
68 | { | |
69 | int ret = 0; | |
dce9bac5 | 70 | |
b5e300c2 | 71 | switch (unixerrno) { |
72 | case 0: | |
f546c780 | 73 | ret = SSH2_FX_OK; |
b5e300c2 | 74 | break; |
75 | case ENOENT: | |
76 | case ENOTDIR: | |
77 | case EBADF: | |
78 | case ELOOP: | |
f546c780 | 79 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 80 | break; |
81 | case EPERM: | |
82 | case EACCES: | |
83 | case EFAULT: | |
f546c780 | 84 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 85 | break; |
86 | case ENAMETOOLONG: | |
87 | case EINVAL: | |
f546c780 | 88 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 89 | break; |
90 | default: | |
f546c780 | 91 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 92 | break; |
93 | } | |
94 | return ret; | |
95 | } | |
96 | ||
396c147e | 97 | static int |
b5e300c2 | 98 | flags_from_portable(int pflags) |
99 | { | |
100 | int flags = 0; | |
dce9bac5 | 101 | |
79ddf6db | 102 | if ((pflags & SSH2_FXF_READ) && |
103 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 104 | flags = O_RDWR; |
f546c780 | 105 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 106 | flags = O_RDONLY; |
f546c780 | 107 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 108 | flags = O_WRONLY; |
109 | } | |
f546c780 | 110 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 111 | flags |= O_CREAT; |
f546c780 | 112 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 113 | flags |= O_TRUNC; |
f546c780 | 114 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 115 | flags |= O_EXCL; |
116 | return flags; | |
117 | } | |
118 | ||
a13880bb | 119 | static const char * |
120 | string_from_portable(int pflags) | |
121 | { | |
122 | static char ret[128]; | |
123 | ||
124 | *ret = '\0'; | |
125 | ||
126 | #define PAPPEND(str) { \ | |
127 | if (*ret != '\0') \ | |
128 | strlcat(ret, ",", sizeof(ret)); \ | |
129 | strlcat(ret, str, sizeof(ret)); \ | |
130 | } | |
131 | ||
132 | if (pflags & SSH2_FXF_READ) | |
133 | PAPPEND("READ") | |
134 | if (pflags & SSH2_FXF_WRITE) | |
135 | PAPPEND("WRITE") | |
136 | if (pflags & SSH2_FXF_CREAT) | |
137 | PAPPEND("CREATE") | |
138 | if (pflags & SSH2_FXF_TRUNC) | |
139 | PAPPEND("TRUNCATE") | |
140 | if (pflags & SSH2_FXF_EXCL) | |
141 | PAPPEND("EXCL") | |
142 | ||
143 | return ret; | |
144 | } | |
145 | ||
396c147e | 146 | static Attrib * |
b5e300c2 | 147 | get_attrib(void) |
148 | { | |
149 | return decode_attrib(&iqueue); | |
150 | } | |
151 | ||
152 | /* handle handles */ | |
153 | ||
154 | typedef struct Handle Handle; | |
155 | struct Handle { | |
156 | int use; | |
157 | DIR *dirp; | |
158 | int fd; | |
159 | char *name; | |
a13880bb | 160 | u_int64_t bytes_read, bytes_write; |
b5e300c2 | 161 | }; |
dce9bac5 | 162 | |
b5e300c2 | 163 | enum { |
164 | HANDLE_UNUSED, | |
165 | HANDLE_DIR, | |
166 | HANDLE_FILE | |
167 | }; | |
dce9bac5 | 168 | |
b5e300c2 | 169 | Handle handles[100]; |
170 | ||
396c147e | 171 | static void |
b5e300c2 | 172 | handle_init(void) |
173 | { | |
2ceb8101 | 174 | u_int i; |
dce9bac5 | 175 | |
184eed6a | 176 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
b5e300c2 | 177 | handles[i].use = HANDLE_UNUSED; |
178 | } | |
179 | ||
396c147e | 180 | static int |
b6c7b7b7 | 181 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 182 | { |
2ceb8101 | 183 | u_int i; |
dce9bac5 | 184 | |
184eed6a | 185 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
b5e300c2 | 186 | if (handles[i].use == HANDLE_UNUSED) { |
187 | handles[i].use = use; | |
188 | handles[i].dirp = dirp; | |
189 | handles[i].fd = fd; | |
3e2f2431 | 190 | handles[i].name = xstrdup(name); |
a13880bb | 191 | handles[i].bytes_read = handles[i].bytes_write = 0; |
b5e300c2 | 192 | return i; |
193 | } | |
194 | } | |
195 | return -1; | |
196 | } | |
197 | ||
396c147e | 198 | static int |
b5e300c2 | 199 | handle_is_ok(int i, int type) |
200 | { | |
2ceb8101 | 201 | return i >= 0 && (u_int)i < sizeof(handles)/sizeof(Handle) && |
f546c780 | 202 | handles[i].use == type; |
b5e300c2 | 203 | } |
204 | ||
396c147e | 205 | static int |
b5e300c2 | 206 | handle_to_string(int handle, char **stringp, int *hlenp) |
207 | { | |
b5e300c2 | 208 | if (stringp == NULL || hlenp == NULL) |
209 | return -1; | |
b5c334cc | 210 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 211 | put_u32(*stringp, handle); |
b5c334cc | 212 | *hlenp = sizeof(int32_t); |
b5e300c2 | 213 | return 0; |
214 | } | |
215 | ||
396c147e | 216 | static int |
b6c7b7b7 | 217 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 218 | { |
b5c334cc | 219 | int val; |
dce9bac5 | 220 | |
b5c334cc | 221 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 222 | return -1; |
51e7a012 | 223 | val = get_u32(handle); |
b5e300c2 | 224 | if (handle_is_ok(val, HANDLE_FILE) || |
225 | handle_is_ok(val, HANDLE_DIR)) | |
226 | return val; | |
227 | return -1; | |
228 | } | |
229 | ||
396c147e | 230 | static char * |
b5e300c2 | 231 | handle_to_name(int handle) |
232 | { | |
233 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
234 | handle_is_ok(handle, HANDLE_FILE)) | |
235 | return handles[handle].name; | |
236 | return NULL; | |
237 | } | |
238 | ||
396c147e | 239 | static DIR * |
b5e300c2 | 240 | handle_to_dir(int handle) |
241 | { | |
242 | if (handle_is_ok(handle, HANDLE_DIR)) | |
243 | return handles[handle].dirp; | |
244 | return NULL; | |
245 | } | |
246 | ||
396c147e | 247 | static int |
b5e300c2 | 248 | handle_to_fd(int handle) |
249 | { | |
2b87da3b | 250 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 251 | return handles[handle].fd; |
252 | return -1; | |
253 | } | |
254 | ||
a13880bb | 255 | static void |
256 | handle_update_read(int handle, ssize_t bytes) | |
257 | { | |
258 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
259 | handles[handle].bytes_read += bytes; | |
260 | } | |
261 | ||
262 | static void | |
263 | handle_update_write(int handle, ssize_t bytes) | |
264 | { | |
265 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
266 | handles[handle].bytes_write += bytes; | |
267 | } | |
268 | ||
269 | static u_int64_t | |
270 | handle_bytes_read(int handle) | |
271 | { | |
272 | if (handle_is_ok(handle, HANDLE_FILE)) | |
273 | return (handles[handle].bytes_read); | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static u_int64_t | |
278 | handle_bytes_write(int handle) | |
279 | { | |
280 | if (handle_is_ok(handle, HANDLE_FILE)) | |
281 | return (handles[handle].bytes_write); | |
282 | return 0; | |
283 | } | |
284 | ||
396c147e | 285 | static int |
b5e300c2 | 286 | handle_close(int handle) |
287 | { | |
288 | int ret = -1; | |
dce9bac5 | 289 | |
b5e300c2 | 290 | if (handle_is_ok(handle, HANDLE_FILE)) { |
291 | ret = close(handles[handle].fd); | |
292 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 293 | xfree(handles[handle].name); |
b5e300c2 | 294 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
295 | ret = closedir(handles[handle].dirp); | |
296 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 297 | xfree(handles[handle].name); |
b5e300c2 | 298 | } else { |
299 | errno = ENOENT; | |
300 | } | |
301 | return ret; | |
302 | } | |
303 | ||
a13880bb | 304 | static void |
305 | handle_log_close(int handle, char *emsg) | |
306 | { | |
307 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
308 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
309 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
310 | handle_to_name(handle), | |
311 | handle_bytes_read(handle), handle_bytes_write(handle)); | |
312 | } else { | |
313 | logit("%s%sclosedir \"%s\"", | |
314 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
315 | handle_to_name(handle)); | |
316 | } | |
317 | } | |
318 | ||
319 | static void | |
320 | handle_log_exit(void) | |
321 | { | |
322 | u_int i; | |
323 | ||
324 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) | |
325 | if (handles[i].use != HANDLE_UNUSED) | |
326 | handle_log_close(i, "forced"); | |
327 | } | |
328 | ||
396c147e | 329 | static int |
b5e300c2 | 330 | get_handle(void) |
331 | { | |
332 | char *handle; | |
f546c780 | 333 | int val = -1; |
bcbf86ec | 334 | u_int hlen; |
dce9bac5 | 335 | |
b5e300c2 | 336 | handle = get_string(&hlen); |
f546c780 | 337 | if (hlen < 256) |
338 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 339 | xfree(handle); |
340 | return val; | |
341 | } | |
342 | ||
343 | /* send replies */ | |
344 | ||
396c147e | 345 | static void |
b5e300c2 | 346 | send_msg(Buffer *m) |
347 | { | |
348 | int mlen = buffer_len(m); | |
dce9bac5 | 349 | |
b5e300c2 | 350 | buffer_put_int(&oqueue, mlen); |
351 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
352 | buffer_consume(m, mlen); | |
353 | } | |
354 | ||
a13880bb | 355 | static const char * |
356 | status_to_message(u_int32_t status) | |
b5e300c2 | 357 | { |
3a7fe5ba | 358 | const char *status_messages[] = { |
359 | "Success", /* SSH_FX_OK */ | |
360 | "End of file", /* SSH_FX_EOF */ | |
361 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
362 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
363 | "Failure", /* SSH_FX_FAILURE */ | |
364 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
365 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
366 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
367 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
368 | "Unknown error" /* Others */ | |
369 | }; | |
a13880bb | 370 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
371 | } | |
dce9bac5 | 372 | |
a13880bb | 373 | static void |
374 | send_status(u_int32_t id, u_int32_t status) | |
375 | { | |
376 | Buffer msg; | |
377 | ||
378 | debug3("request %u: sent status %u", id, status); | |
379 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
380 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
381 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 382 | buffer_init(&msg); |
f546c780 | 383 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 384 | buffer_put_int(&msg, id); |
ca75d7de | 385 | buffer_put_int(&msg, status); |
3a7fe5ba | 386 | if (version >= 3) { |
a13880bb | 387 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 388 | buffer_put_cstring(&msg, ""); |
389 | } | |
b5e300c2 | 390 | send_msg(&msg); |
391 | buffer_free(&msg); | |
392 | } | |
396c147e | 393 | static void |
b6c7b7b7 | 394 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 395 | { |
396 | Buffer msg; | |
dce9bac5 | 397 | |
b5e300c2 | 398 | buffer_init(&msg); |
399 | buffer_put_char(&msg, type); | |
400 | buffer_put_int(&msg, id); | |
401 | buffer_put_string(&msg, data, dlen); | |
402 | send_msg(&msg); | |
403 | buffer_free(&msg); | |
404 | } | |
405 | ||
396c147e | 406 | static void |
b6c7b7b7 | 407 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 408 | { |
a13880bb | 409 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 410 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 411 | } |
412 | ||
396c147e | 413 | static void |
b5e300c2 | 414 | send_handle(u_int32_t id, int handle) |
415 | { | |
416 | char *string; | |
417 | int hlen; | |
dce9bac5 | 418 | |
b5e300c2 | 419 | handle_to_string(handle, &string, &hlen); |
a13880bb | 420 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 421 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 422 | xfree(string); |
423 | } | |
424 | ||
396c147e | 425 | static void |
b6c7b7b7 | 426 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 427 | { |
428 | Buffer msg; | |
429 | int i; | |
dce9bac5 | 430 | |
b5e300c2 | 431 | buffer_init(&msg); |
f546c780 | 432 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 433 | buffer_put_int(&msg, id); |
434 | buffer_put_int(&msg, count); | |
a13880bb | 435 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 436 | for (i = 0; i < count; i++) { |
437 | buffer_put_cstring(&msg, stats[i].name); | |
438 | buffer_put_cstring(&msg, stats[i].long_name); | |
439 | encode_attrib(&msg, &stats[i].attrib); | |
440 | } | |
441 | send_msg(&msg); | |
442 | buffer_free(&msg); | |
443 | } | |
444 | ||
396c147e | 445 | static void |
b6c7b7b7 | 446 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 447 | { |
448 | Buffer msg; | |
dce9bac5 | 449 | |
a13880bb | 450 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 451 | buffer_init(&msg); |
f546c780 | 452 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 453 | buffer_put_int(&msg, id); |
454 | encode_attrib(&msg, a); | |
455 | send_msg(&msg); | |
456 | buffer_free(&msg); | |
457 | } | |
458 | ||
459 | /* parse incoming */ | |
460 | ||
396c147e | 461 | static void |
b5e300c2 | 462 | process_init(void) |
463 | { | |
464 | Buffer msg; | |
b5e300c2 | 465 | |
802d93bb | 466 | version = get_int(); |
a13880bb | 467 | verbose("received client version %d", version); |
b5e300c2 | 468 | buffer_init(&msg); |
f546c780 | 469 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
470 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 471 | send_msg(&msg); |
472 | buffer_free(&msg); | |
473 | } | |
474 | ||
396c147e | 475 | static void |
b5e300c2 | 476 | process_open(void) |
477 | { | |
478 | u_int32_t id, pflags; | |
479 | Attrib *a; | |
480 | char *name; | |
f546c780 | 481 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 482 | |
483 | id = get_int(); | |
484 | name = get_string(NULL); | |
f546c780 | 485 | pflags = get_int(); /* portable flags */ |
26ddd377 | 486 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 487 | a = get_attrib(); |
488 | flags = flags_from_portable(pflags); | |
f546c780 | 489 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 490 | logit("open \"%s\" flags %s mode 0%o", |
491 | name, string_from_portable(pflags), mode); | |
b5e300c2 | 492 | fd = open(name, flags, mode); |
493 | if (fd < 0) { | |
494 | status = errno_to_portable(errno); | |
495 | } else { | |
3e2f2431 | 496 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 497 | if (handle < 0) { |
498 | close(fd); | |
499 | } else { | |
500 | send_handle(id, handle); | |
f546c780 | 501 | status = SSH2_FX_OK; |
b5e300c2 | 502 | } |
503 | } | |
f546c780 | 504 | if (status != SSH2_FX_OK) |
b5e300c2 | 505 | send_status(id, status); |
506 | xfree(name); | |
507 | } | |
508 | ||
396c147e | 509 | static void |
b5e300c2 | 510 | process_close(void) |
511 | { | |
512 | u_int32_t id; | |
f546c780 | 513 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 514 | |
515 | id = get_int(); | |
516 | handle = get_handle(); | |
a13880bb | 517 | debug3("request %u: close handle %u", id, handle); |
518 | handle_log_close(handle, NULL); | |
b5e300c2 | 519 | ret = handle_close(handle); |
f546c780 | 520 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 521 | send_status(id, status); |
522 | } | |
523 | ||
396c147e | 524 | static void |
b5e300c2 | 525 | process_read(void) |
526 | { | |
527 | char buf[64*1024]; | |
f546c780 | 528 | u_int32_t id, len; |
529 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 530 | u_int64_t off; |
531 | ||
532 | id = get_int(); | |
533 | handle = get_handle(); | |
f546c780 | 534 | off = get_int64(); |
b5e300c2 | 535 | len = get_int(); |
536 | ||
a13880bb | 537 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
538 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 539 | if (len > sizeof buf) { |
540 | len = sizeof buf; | |
a13880bb | 541 | debug2("read change len %d", len); |
b5e300c2 | 542 | } |
543 | fd = handle_to_fd(handle); | |
544 | if (fd >= 0) { | |
545 | if (lseek(fd, off, SEEK_SET) < 0) { | |
546 | error("process_read: seek failed"); | |
547 | status = errno_to_portable(errno); | |
548 | } else { | |
549 | ret = read(fd, buf, len); | |
550 | if (ret < 0) { | |
551 | status = errno_to_portable(errno); | |
552 | } else if (ret == 0) { | |
f546c780 | 553 | status = SSH2_FX_EOF; |
b5e300c2 | 554 | } else { |
555 | send_data(id, buf, ret); | |
f546c780 | 556 | status = SSH2_FX_OK; |
a13880bb | 557 | handle_update_read(handle, ret); |
b5e300c2 | 558 | } |
559 | } | |
560 | } | |
f546c780 | 561 | if (status != SSH2_FX_OK) |
b5e300c2 | 562 | send_status(id, status); |
563 | } | |
564 | ||
396c147e | 565 | static void |
b5e300c2 | 566 | process_write(void) |
567 | { | |
f546c780 | 568 | u_int32_t id; |
b5e300c2 | 569 | u_int64_t off; |
bcbf86ec | 570 | u_int len; |
f546c780 | 571 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 572 | char *data; |
573 | ||
574 | id = get_int(); | |
575 | handle = get_handle(); | |
f546c780 | 576 | off = get_int64(); |
b5e300c2 | 577 | data = get_string(&len); |
578 | ||
a13880bb | 579 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
580 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 581 | fd = handle_to_fd(handle); |
582 | if (fd >= 0) { | |
583 | if (lseek(fd, off, SEEK_SET) < 0) { | |
584 | status = errno_to_portable(errno); | |
585 | error("process_write: seek failed"); | |
586 | } else { | |
587 | /* XXX ATOMICIO ? */ | |
588 | ret = write(fd, data, len); | |
2ceb8101 | 589 | if (ret < 0) { |
b5e300c2 | 590 | error("process_write: write failed"); |
591 | status = errno_to_portable(errno); | |
2ceb8101 | 592 | } else if ((size_t)ret == len) { |
f546c780 | 593 | status = SSH2_FX_OK; |
a13880bb | 594 | handle_update_write(handle, ret); |
b5e300c2 | 595 | } else { |
a13880bb | 596 | debug2("nothing at all written"); |
b5e300c2 | 597 | } |
598 | } | |
599 | } | |
600 | send_status(id, status); | |
601 | xfree(data); | |
602 | } | |
603 | ||
396c147e | 604 | static void |
b5e300c2 | 605 | process_do_stat(int do_lstat) |
606 | { | |
b5c334cc | 607 | Attrib a; |
b5e300c2 | 608 | struct stat st; |
609 | u_int32_t id; | |
610 | char *name; | |
f546c780 | 611 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 612 | |
613 | id = get_int(); | |
614 | name = get_string(NULL); | |
a13880bb | 615 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
616 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 617 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
618 | if (ret < 0) { | |
619 | status = errno_to_portable(errno); | |
620 | } else { | |
b5c334cc | 621 | stat_to_attrib(&st, &a); |
622 | send_attrib(id, &a); | |
f546c780 | 623 | status = SSH2_FX_OK; |
b5e300c2 | 624 | } |
f546c780 | 625 | if (status != SSH2_FX_OK) |
b5e300c2 | 626 | send_status(id, status); |
627 | xfree(name); | |
628 | } | |
629 | ||
396c147e | 630 | static void |
b5e300c2 | 631 | process_stat(void) |
632 | { | |
633 | process_do_stat(0); | |
634 | } | |
635 | ||
396c147e | 636 | static void |
b5e300c2 | 637 | process_lstat(void) |
638 | { | |
639 | process_do_stat(1); | |
640 | } | |
641 | ||
396c147e | 642 | static void |
b5e300c2 | 643 | process_fstat(void) |
644 | { | |
b5c334cc | 645 | Attrib a; |
b5e300c2 | 646 | struct stat st; |
647 | u_int32_t id; | |
f546c780 | 648 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 649 | |
650 | id = get_int(); | |
651 | handle = get_handle(); | |
a13880bb | 652 | debug("request %u: fstat \"%s\" (handle %u)", |
653 | id, handle_to_name(handle), handle); | |
b5e300c2 | 654 | fd = handle_to_fd(handle); |
655 | if (fd >= 0) { | |
656 | ret = fstat(fd, &st); | |
657 | if (ret < 0) { | |
658 | status = errno_to_portable(errno); | |
659 | } else { | |
b5c334cc | 660 | stat_to_attrib(&st, &a); |
661 | send_attrib(id, &a); | |
f546c780 | 662 | status = SSH2_FX_OK; |
b5e300c2 | 663 | } |
664 | } | |
f546c780 | 665 | if (status != SSH2_FX_OK) |
b5e300c2 | 666 | send_status(id, status); |
667 | } | |
668 | ||
396c147e | 669 | static struct timeval * |
b6c7b7b7 | 670 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 671 | { |
672 | static struct timeval tv[2]; | |
dce9bac5 | 673 | |
b5e300c2 | 674 | tv[0].tv_sec = a->atime; |
675 | tv[0].tv_usec = 0; | |
676 | tv[1].tv_sec = a->mtime; | |
677 | tv[1].tv_usec = 0; | |
678 | return tv; | |
679 | } | |
680 | ||
396c147e | 681 | static void |
b5e300c2 | 682 | process_setstat(void) |
683 | { | |
684 | Attrib *a; | |
685 | u_int32_t id; | |
686 | char *name; | |
9906a836 | 687 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 688 | |
689 | id = get_int(); | |
690 | name = get_string(NULL); | |
691 | a = get_attrib(); | |
a13880bb | 692 | debug("request %u: setstat name \"%s\"", id, name); |
cb476289 | 693 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 694 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 695 | ret = truncate(name, a->size); |
696 | if (ret == -1) | |
697 | status = errno_to_portable(errno); | |
698 | } | |
f546c780 | 699 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 700 | logit("set \"%s\" mode %04o", name, a->perm); |
b5e300c2 | 701 | ret = chmod(name, a->perm & 0777); |
702 | if (ret == -1) | |
703 | status = errno_to_portable(errno); | |
704 | } | |
f546c780 | 705 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 706 | char buf[64]; |
707 | time_t t = a->mtime; | |
708 | ||
709 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
710 | localtime(&t)); | |
711 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 712 | ret = utimes(name, attrib_to_tv(a)); |
713 | if (ret == -1) | |
714 | status = errno_to_portable(errno); | |
715 | } | |
408ba72f | 716 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 717 | logit("set \"%s\" owner %lu group %lu", name, |
718 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 719 | ret = chown(name, a->uid, a->gid); |
720 | if (ret == -1) | |
721 | status = errno_to_portable(errno); | |
722 | } | |
b5e300c2 | 723 | send_status(id, status); |
724 | xfree(name); | |
725 | } | |
726 | ||
396c147e | 727 | static void |
b5e300c2 | 728 | process_fsetstat(void) |
729 | { | |
730 | Attrib *a; | |
731 | u_int32_t id; | |
732 | int handle, fd, ret; | |
f546c780 | 733 | int status = SSH2_FX_OK; |
16e538d4 | 734 | |
b5e300c2 | 735 | id = get_int(); |
736 | handle = get_handle(); | |
737 | a = get_attrib(); | |
a13880bb | 738 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 739 | fd = handle_to_fd(handle); |
a13880bb | 740 | if (fd < 0) { |
f546c780 | 741 | status = SSH2_FX_FAILURE; |
b5e300c2 | 742 | } else { |
a13880bb | 743 | char *name = handle_to_name(handle); |
744 | ||
cb476289 | 745 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 746 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 747 | ret = ftruncate(fd, a->size); |
748 | if (ret == -1) | |
749 | status = errno_to_portable(errno); | |
750 | } | |
f546c780 | 751 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 752 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 753 | #ifdef HAVE_FCHMOD |
b5e300c2 | 754 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 755 | #else |
c33f0b36 | 756 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 757 | #endif |
b5e300c2 | 758 | if (ret == -1) |
759 | status = errno_to_portable(errno); | |
760 | } | |
f546c780 | 761 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 762 | char buf[64]; |
763 | time_t t = a->mtime; | |
764 | ||
765 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
766 | localtime(&t)); | |
767 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 768 | #ifdef HAVE_FUTIMES |
769 | ret = futimes(fd, attrib_to_tv(a)); | |
770 | #else | |
771 | ret = utimes(name, attrib_to_tv(a)); | |
772 | #endif | |
773 | if (ret == -1) | |
774 | status = errno_to_portable(errno); | |
775 | } | |
408ba72f | 776 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 777 | logit("set \"%s\" owner %lu group %lu", name, |
778 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 779 | #ifdef HAVE_FCHOWN |
408ba72f | 780 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 781 | #else |
782 | ret = chown(name, a->uid, a->gid); | |
783 | #endif | |
408ba72f | 784 | if (ret == -1) |
785 | status = errno_to_portable(errno); | |
786 | } | |
b5e300c2 | 787 | } |
788 | send_status(id, status); | |
789 | } | |
790 | ||
396c147e | 791 | static void |
b5e300c2 | 792 | process_opendir(void) |
793 | { | |
794 | DIR *dirp = NULL; | |
795 | char *path; | |
f546c780 | 796 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 797 | u_int32_t id; |
798 | ||
799 | id = get_int(); | |
800 | path = get_string(NULL); | |
a13880bb | 801 | debug3("request %u: opendir", id); |
802 | logit("opendir \"%s\"", path); | |
2b87da3b | 803 | dirp = opendir(path); |
b5e300c2 | 804 | if (dirp == NULL) { |
805 | status = errno_to_portable(errno); | |
806 | } else { | |
3e2f2431 | 807 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 808 | if (handle < 0) { |
809 | closedir(dirp); | |
810 | } else { | |
811 | send_handle(id, handle); | |
f546c780 | 812 | status = SSH2_FX_OK; |
b5e300c2 | 813 | } |
2b87da3b | 814 | |
b5e300c2 | 815 | } |
f546c780 | 816 | if (status != SSH2_FX_OK) |
b5e300c2 | 817 | send_status(id, status); |
818 | xfree(path); | |
819 | } | |
820 | ||
396c147e | 821 | static void |
b5e300c2 | 822 | process_readdir(void) |
823 | { | |
824 | DIR *dirp; | |
825 | struct dirent *dp; | |
826 | char *path; | |
827 | int handle; | |
828 | u_int32_t id; | |
829 | ||
830 | id = get_int(); | |
831 | handle = get_handle(); | |
a13880bb | 832 | debug("request %u: readdir \"%s\" (handle %d)", id, |
833 | handle_to_name(handle), handle); | |
b5e300c2 | 834 | dirp = handle_to_dir(handle); |
835 | path = handle_to_name(handle); | |
836 | if (dirp == NULL || path == NULL) { | |
f546c780 | 837 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 838 | } else { |
b5e300c2 | 839 | struct stat st; |
a13880bb | 840 | char pathname[MAXPATHLEN]; |
b5e300c2 | 841 | Stat *stats; |
842 | int nstats = 10, count = 0, i; | |
9906a836 | 843 | |
52e3daed | 844 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 845 | while ((dp = readdir(dirp)) != NULL) { |
846 | if (count >= nstats) { | |
847 | nstats *= 2; | |
c5d10563 | 848 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 849 | } |
850 | /* XXX OVERFLOW ? */ | |
88690211 | 851 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
852 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 853 | if (lstat(pathname, &st) < 0) |
854 | continue; | |
b5c334cc | 855 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 856 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 857 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 858 | count++; |
859 | /* send up to 100 entries in one message */ | |
b5c334cc | 860 | /* XXX check packet size instead */ |
b5e300c2 | 861 | if (count == 100) |
862 | break; | |
863 | } | |
f546c780 | 864 | if (count > 0) { |
865 | send_names(id, count, stats); | |
184eed6a | 866 | for (i = 0; i < count; i++) { |
f546c780 | 867 | xfree(stats[i].name); |
868 | xfree(stats[i].long_name); | |
869 | } | |
870 | } else { | |
871 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 872 | } |
873 | xfree(stats); | |
874 | } | |
875 | } | |
876 | ||
396c147e | 877 | static void |
b5e300c2 | 878 | process_remove(void) |
879 | { | |
880 | char *name; | |
881 | u_int32_t id; | |
f546c780 | 882 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 883 | int ret; |
884 | ||
885 | id = get_int(); | |
886 | name = get_string(NULL); | |
a13880bb | 887 | debug3("request %u: remove", id); |
888 | logit("remove name \"%s\"", name); | |
67b0facb | 889 | ret = unlink(name); |
f546c780 | 890 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 891 | send_status(id, status); |
892 | xfree(name); | |
893 | } | |
894 | ||
396c147e | 895 | static void |
b5e300c2 | 896 | process_mkdir(void) |
897 | { | |
898 | Attrib *a; | |
899 | u_int32_t id; | |
900 | char *name; | |
f546c780 | 901 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 902 | |
903 | id = get_int(); | |
904 | name = get_string(NULL); | |
905 | a = get_attrib(); | |
f546c780 | 906 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
907 | a->perm & 0777 : 0777; | |
a13880bb | 908 | debug3("request %u: mkdir", id); |
909 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
b5e300c2 | 910 | ret = mkdir(name, mode); |
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_rmdir(void) |
918 | { | |
919 | u_int32_t id; | |
920 | char *name; | |
921 | int ret, status; | |
922 | ||
923 | id = get_int(); | |
924 | name = get_string(NULL); | |
a13880bb | 925 | debug3("request %u: rmdir", id); |
926 | logit("rmdir name \"%s\"", name); | |
b5e300c2 | 927 | ret = rmdir(name); |
f546c780 | 928 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 929 | send_status(id, status); |
930 | xfree(name); | |
931 | } | |
932 | ||
396c147e | 933 | static void |
b5e300c2 | 934 | process_realpath(void) |
935 | { | |
936 | char resolvedname[MAXPATHLEN]; | |
937 | u_int32_t id; | |
938 | char *path; | |
939 | ||
940 | id = get_int(); | |
941 | path = get_string(NULL); | |
6b523bae | 942 | if (path[0] == '\0') { |
943 | xfree(path); | |
944 | path = xstrdup("."); | |
945 | } | |
a13880bb | 946 | debug3("request %u: realpath", id); |
947 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 948 | if (realpath(path, resolvedname) == NULL) { |
949 | send_status(id, errno_to_portable(errno)); | |
950 | } else { | |
951 | Stat s; | |
952 | attrib_clear(&s.attrib); | |
953 | s.name = s.long_name = resolvedname; | |
954 | send_names(id, 1, &s); | |
955 | } | |
956 | xfree(path); | |
957 | } | |
958 | ||
396c147e | 959 | static void |
b5e300c2 | 960 | process_rename(void) |
961 | { | |
962 | u_int32_t id; | |
963 | char *oldpath, *newpath; | |
f2f28f1f | 964 | int status; |
fd77a40f | 965 | struct stat sb; |
b5e300c2 | 966 | |
967 | id = get_int(); | |
968 | oldpath = get_string(NULL); | |
969 | newpath = get_string(NULL); | |
a13880bb | 970 | debug3("request %u: rename", id); |
971 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 972 | status = SSH2_FX_FAILURE; |
973 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 974 | status = errno_to_portable(errno); |
fd77a40f | 975 | else if (S_ISREG(sb.st_mode)) { |
976 | /* Race-free rename of regular files */ | |
dc5888bf | 977 | if (link(oldpath, newpath) == -1) { |
cd698186 | 978 | if (errno == EOPNOTSUPP |
979 | #ifdef LINK_OPNOTSUPP_ERRNO | |
980 | || errno == LINK_OPNOTSUPP_ERRNO | |
981 | #endif | |
982 | ) { | |
dc5888bf | 983 | struct stat st; |
984 | ||
985 | /* | |
986 | * fs doesn't support links, so fall back to | |
987 | * stat+rename. This is racy. | |
988 | */ | |
989 | if (stat(newpath, &st) == -1) { | |
990 | if (rename(oldpath, newpath) == -1) | |
991 | status = | |
992 | errno_to_portable(errno); | |
993 | else | |
994 | status = SSH2_FX_OK; | |
995 | } | |
996 | } else { | |
997 | status = errno_to_portable(errno); | |
998 | } | |
999 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 1000 | status = errno_to_portable(errno); |
1001 | /* clean spare link */ | |
1002 | unlink(newpath); | |
1003 | } else | |
1004 | status = SSH2_FX_OK; | |
1005 | } else if (stat(newpath, &sb) == -1) { | |
1006 | if (rename(oldpath, newpath) == -1) | |
1007 | status = errno_to_portable(errno); | |
1008 | else | |
1009 | status = SSH2_FX_OK; | |
1010 | } | |
b5e300c2 | 1011 | send_status(id, status); |
1012 | xfree(oldpath); | |
1013 | xfree(newpath); | |
1014 | } | |
1015 | ||
396c147e | 1016 | static void |
3a7fe5ba | 1017 | process_readlink(void) |
1018 | { | |
1019 | u_int32_t id; | |
362df52e | 1020 | int len; |
ca75d7de | 1021 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1022 | char *path; |
1023 | ||
1024 | id = get_int(); | |
1025 | path = get_string(NULL); | |
a13880bb | 1026 | debug3("request %u: readlink", id); |
1027 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1028 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1029 | send_status(id, errno_to_portable(errno)); |
1030 | else { | |
1031 | Stat s; | |
184eed6a | 1032 | |
ca75d7de | 1033 | buf[len] = '\0'; |
3a7fe5ba | 1034 | attrib_clear(&s.attrib); |
ca75d7de | 1035 | s.name = s.long_name = buf; |
3a7fe5ba | 1036 | send_names(id, 1, &s); |
1037 | } | |
1038 | xfree(path); | |
1039 | } | |
1040 | ||
396c147e | 1041 | static void |
3a7fe5ba | 1042 | process_symlink(void) |
1043 | { | |
1044 | u_int32_t id; | |
3a7fe5ba | 1045 | char *oldpath, *newpath; |
f2f28f1f | 1046 | int ret, status; |
3a7fe5ba | 1047 | |
1048 | id = get_int(); | |
1049 | oldpath = get_string(NULL); | |
1050 | newpath = get_string(NULL); | |
a13880bb | 1051 | debug3("request %u: symlink", id); |
1052 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1053 | /* this will fail if 'newpath' exists */ |
1054 | ret = symlink(oldpath, newpath); | |
1055 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 1056 | send_status(id, status); |
1057 | xfree(oldpath); | |
1058 | xfree(newpath); | |
1059 | } | |
1060 | ||
396c147e | 1061 | static void |
f546c780 | 1062 | process_extended(void) |
1063 | { | |
1064 | u_int32_t id; | |
1065 | char *request; | |
1066 | ||
1067 | id = get_int(); | |
1068 | request = get_string(NULL); | |
1069 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
1070 | xfree(request); | |
1071 | } | |
b5e300c2 | 1072 | |
1073 | /* stolen from ssh-agent */ | |
1074 | ||
396c147e | 1075 | static void |
b5e300c2 | 1076 | process(void) |
1077 | { | |
1e3b8b07 | 1078 | u_int msg_len; |
9b4ac641 | 1079 | u_int buf_len; |
1080 | u_int consumed; | |
1e3b8b07 | 1081 | u_int type; |
1082 | u_char *cp; | |
b5e300c2 | 1083 | |
9b4ac641 | 1084 | buf_len = buffer_len(&iqueue); |
1085 | if (buf_len < 5) | |
b5e300c2 | 1086 | return; /* Incomplete message. */ |
20905a8e | 1087 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1088 | msg_len = get_u32(cp); |
3eee3b86 | 1089 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1090 | error("bad message from %s local user %s", |
1091 | client_addr, pw->pw_name); | |
1092 | cleanup_exit(11); | |
b5e300c2 | 1093 | } |
9b4ac641 | 1094 | if (buf_len < msg_len + 4) |
b5e300c2 | 1095 | return; |
1096 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1097 | buf_len -= 4; |
b5e300c2 | 1098 | type = buffer_get_char(&iqueue); |
1099 | switch (type) { | |
f546c780 | 1100 | case SSH2_FXP_INIT: |
b5e300c2 | 1101 | process_init(); |
1102 | break; | |
f546c780 | 1103 | case SSH2_FXP_OPEN: |
b5e300c2 | 1104 | process_open(); |
1105 | break; | |
f546c780 | 1106 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1107 | process_close(); |
1108 | break; | |
f546c780 | 1109 | case SSH2_FXP_READ: |
b5e300c2 | 1110 | process_read(); |
1111 | break; | |
f546c780 | 1112 | case SSH2_FXP_WRITE: |
b5e300c2 | 1113 | process_write(); |
1114 | break; | |
f546c780 | 1115 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1116 | process_lstat(); |
1117 | break; | |
f546c780 | 1118 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1119 | process_fstat(); |
1120 | break; | |
f546c780 | 1121 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1122 | process_setstat(); |
1123 | break; | |
f546c780 | 1124 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1125 | process_fsetstat(); |
1126 | break; | |
f546c780 | 1127 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1128 | process_opendir(); |
1129 | break; | |
f546c780 | 1130 | case SSH2_FXP_READDIR: |
b5e300c2 | 1131 | process_readdir(); |
1132 | break; | |
f546c780 | 1133 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1134 | process_remove(); |
1135 | break; | |
f546c780 | 1136 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1137 | process_mkdir(); |
1138 | break; | |
f546c780 | 1139 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1140 | process_rmdir(); |
1141 | break; | |
f546c780 | 1142 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1143 | process_realpath(); |
1144 | break; | |
f546c780 | 1145 | case SSH2_FXP_STAT: |
b5e300c2 | 1146 | process_stat(); |
1147 | break; | |
f546c780 | 1148 | case SSH2_FXP_RENAME: |
b5e300c2 | 1149 | process_rename(); |
1150 | break; | |
3a7fe5ba | 1151 | case SSH2_FXP_READLINK: |
1152 | process_readlink(); | |
1153 | break; | |
1154 | case SSH2_FXP_SYMLINK: | |
1155 | process_symlink(); | |
1156 | break; | |
f546c780 | 1157 | case SSH2_FXP_EXTENDED: |
1158 | process_extended(); | |
1159 | break; | |
b5e300c2 | 1160 | default: |
1161 | error("Unknown message %d", type); | |
1162 | break; | |
1163 | } | |
9b4ac641 | 1164 | /* discard the remaining bytes from the current packet */ |
1165 | if (buf_len < buffer_len(&iqueue)) | |
a13880bb | 1166 | fatal("iqueue grew unexpectedly"); |
9b4ac641 | 1167 | consumed = buf_len - buffer_len(&iqueue); |
1168 | if (msg_len < consumed) | |
1169 | fatal("msg_len %d < consumed %d", msg_len, consumed); | |
1170 | if (msg_len > consumed) | |
1171 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1172 | } |
1173 | ||
a13880bb | 1174 | /* Cleanup handler that logs active handles upon normal exit */ |
1175 | void | |
1176 | cleanup_exit(int i) | |
1177 | { | |
1178 | if (pw != NULL && client_addr != NULL) { | |
1179 | handle_log_exit(); | |
1180 | logit("session closed for local user %s from [%s]", | |
1181 | pw->pw_name, client_addr); | |
1182 | } | |
1183 | _exit(i); | |
1184 | } | |
1185 | ||
1186 | static void | |
1187 | usage(void) | |
1188 | { | |
1189 | extern char *__progname; | |
1190 | ||
1191 | fprintf(stderr, | |
1192 | "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname); | |
1193 | exit(1); | |
1194 | } | |
1195 | ||
b5e300c2 | 1196 | int |
a13880bb | 1197 | main(int argc, char **argv) |
b5e300c2 | 1198 | { |
c8d75031 | 1199 | fd_set *rset, *wset; |
a13880bb | 1200 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1201 | ssize_t len, olen, set_size; |
a13880bb | 1202 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
1203 | char *cp; | |
1204 | ||
a13880bb | 1205 | extern char *optarg; |
1206 | extern char *__progname; | |
b5e300c2 | 1207 | |
fd6168c1 | 1208 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1209 | sanitise_stdfd(); | |
1210 | ||
a13880bb | 1211 | __progname = ssh_get_progname(argv[0]); |
1212 | log_init(__progname, log_level, log_facility, log_stderr); | |
1213 | ||
1214 | while (!skipargs && (ch = getopt(argc, argv, "C:f:l:che")) != -1) { | |
1215 | switch (ch) { | |
1216 | case 'c': | |
1217 | /* | |
1218 | * Ignore all arguments if we are invoked as a | |
1219 | * shell using "sftp-server -c command" | |
1220 | */ | |
1221 | skipargs = 1; | |
1222 | break; | |
1223 | case 'e': | |
1224 | log_stderr = 1; | |
1225 | break; | |
1226 | case 'l': | |
1227 | log_level = log_level_number(optarg); | |
1228 | if (log_level == SYSLOG_LEVEL_NOT_SET) | |
1229 | error("Invalid log level \"%s\"", optarg); | |
1230 | break; | |
1231 | case 'f': | |
1232 | log_facility = log_facility_number(optarg); | |
1233 | if (log_level == SYSLOG_FACILITY_NOT_SET) | |
1234 | error("Invalid log facility \"%s\"", optarg); | |
1235 | break; | |
1236 | case 'h': | |
1237 | default: | |
1238 | usage(); | |
1239 | } | |
1240 | } | |
61b3a2bc | 1241 | |
a13880bb | 1242 | log_init(__progname, log_level, log_facility, log_stderr); |
b5e300c2 | 1243 | |
a13880bb | 1244 | if ((cp = getenv("SSH_CONNECTION")) != NULL) { |
1245 | client_addr = xstrdup(cp); | |
1246 | if ((cp = strchr(client_addr, ' ')) == NULL) | |
1247 | fatal("Malformed SSH_CONNECTION variable: \"%s\"", | |
1248 | getenv("SSH_CONNECTION")); | |
1249 | *cp = '\0'; | |
1250 | } else | |
1251 | client_addr = xstrdup("UNKNOWN"); | |
1252 | ||
1253 | if ((pw = getpwuid(getuid())) == NULL) | |
1254 | fatal("No user found for uid %lu", (u_long)getuid()); | |
1255 | pw = pwcopy(pw); | |
1256 | ||
1257 | logit("session opened for local user %s from [%s]", | |
1258 | pw->pw_name, client_addr); | |
1259 | ||
1260 | handle_init(); | |
f546c780 | 1261 | |
b5e300c2 | 1262 | in = dup(STDIN_FILENO); |
1263 | out = dup(STDOUT_FILENO); | |
1264 | ||
fe56c12b | 1265 | #ifdef HAVE_CYGWIN |
1266 | setmode(in, O_BINARY); | |
1267 | setmode(out, O_BINARY); | |
1268 | #endif | |
1269 | ||
b5e300c2 | 1270 | max = 0; |
1271 | if (in > max) | |
1272 | max = in; | |
1273 | if (out > max) | |
1274 | max = out; | |
1275 | ||
1276 | buffer_init(&iqueue); | |
1277 | buffer_init(&oqueue); | |
1278 | ||
c8d75031 | 1279 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1280 | rset = (fd_set *)xmalloc(set_size); | |
1281 | wset = (fd_set *)xmalloc(set_size); | |
1282 | ||
b5e300c2 | 1283 | for (;;) { |
c8d75031 | 1284 | memset(rset, 0, set_size); |
1285 | memset(wset, 0, set_size); | |
b5e300c2 | 1286 | |
c8d75031 | 1287 | FD_SET(in, rset); |
b5e300c2 | 1288 | olen = buffer_len(&oqueue); |
1289 | if (olen > 0) | |
c8d75031 | 1290 | FD_SET(out, wset); |
b5e300c2 | 1291 | |
c8d75031 | 1292 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1293 | if (errno == EINTR) |
1294 | continue; | |
a13880bb | 1295 | error("select: %s", strerror(errno)); |
1296 | cleanup_exit(2); | |
b5e300c2 | 1297 | } |
1298 | ||
1299 | /* copy stdin to iqueue */ | |
c8d75031 | 1300 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1301 | char buf[4*4096]; |
1302 | len = read(in, buf, sizeof buf); | |
1303 | if (len == 0) { | |
1304 | debug("read eof"); | |
a13880bb | 1305 | cleanup_exit(0); |
b5e300c2 | 1306 | } else if (len < 0) { |
a13880bb | 1307 | error("read: %s", strerror(errno)); |
1308 | cleanup_exit(1); | |
b5e300c2 | 1309 | } else { |
1310 | buffer_append(&iqueue, buf, len); | |
1311 | } | |
1312 | } | |
1313 | /* send oqueue to stdout */ | |
c8d75031 | 1314 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1315 | len = write(out, buffer_ptr(&oqueue), olen); |
1316 | if (len < 0) { | |
a13880bb | 1317 | error("write: %s", strerror(errno)); |
1318 | cleanup_exit(1); | |
b5e300c2 | 1319 | } else { |
1320 | buffer_consume(&oqueue, len); | |
1321 | } | |
1322 | } | |
1323 | /* process requests from client */ | |
1324 | process(); | |
1325 | } | |
1326 | } |