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d3221cca | 1 | /* $OpenBSD: sftp-server.c,v 1.59 2006/07/09 15:15:11 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> | |
d3221cca | 23 | #include <fcntl.h> |
b1842393 | 24 | #include <pwd.h> |
b5e300c2 | 25 | |
b5e300c2 | 26 | #include "buffer.h" |
27 | #include "bufaux.h" | |
42f11eb2 | 28 | #include "log.h" |
b5e300c2 | 29 | #include "xmalloc.h" |
fd6168c1 | 30 | #include "misc.h" |
a13880bb | 31 | #include "uidswap.h" |
b5e300c2 | 32 | |
f546c780 | 33 | #include "sftp.h" |
61e96248 | 34 | #include "sftp-common.h" |
b5e300c2 | 35 | |
36 | /* helper */ | |
f546c780 | 37 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 38 | #define get_int() buffer_get_int(&iqueue); |
39 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
b5e300c2 | 40 | |
a13880bb | 41 | /* Our verbosity */ |
42 | LogLevel log_level = SYSLOG_LEVEL_ERROR; | |
43 | ||
44 | /* Our client */ | |
45 | struct passwd *pw = NULL; | |
46 | char *client_addr = NULL; | |
260d427b | 47 | |
b5e300c2 | 48 | /* input and output queue */ |
49 | Buffer iqueue; | |
50 | Buffer oqueue; | |
51 | ||
3a7fe5ba | 52 | /* Version of client */ |
53 | int version; | |
54 | ||
d7ded285 | 55 | /* portable attributes, etc. */ |
b5e300c2 | 56 | |
b5e300c2 | 57 | typedef struct Stat Stat; |
58 | ||
61e96248 | 59 | struct Stat { |
b5e300c2 | 60 | char *name; |
61 | char *long_name; | |
62 | Attrib attrib; | |
63 | }; | |
64 | ||
396c147e | 65 | static int |
b5e300c2 | 66 | errno_to_portable(int unixerrno) |
67 | { | |
68 | int ret = 0; | |
dce9bac5 | 69 | |
b5e300c2 | 70 | switch (unixerrno) { |
71 | case 0: | |
f546c780 | 72 | ret = SSH2_FX_OK; |
b5e300c2 | 73 | break; |
74 | case ENOENT: | |
75 | case ENOTDIR: | |
76 | case EBADF: | |
77 | case ELOOP: | |
f546c780 | 78 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 79 | break; |
80 | case EPERM: | |
81 | case EACCES: | |
82 | case EFAULT: | |
f546c780 | 83 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 84 | break; |
85 | case ENAMETOOLONG: | |
86 | case EINVAL: | |
f546c780 | 87 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 88 | break; |
89 | default: | |
f546c780 | 90 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 91 | break; |
92 | } | |
93 | return ret; | |
94 | } | |
95 | ||
396c147e | 96 | static int |
b5e300c2 | 97 | flags_from_portable(int pflags) |
98 | { | |
99 | int flags = 0; | |
dce9bac5 | 100 | |
79ddf6db | 101 | if ((pflags & SSH2_FXF_READ) && |
102 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 103 | flags = O_RDWR; |
f546c780 | 104 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 105 | flags = O_RDONLY; |
f546c780 | 106 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 107 | flags = O_WRONLY; |
108 | } | |
f546c780 | 109 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 110 | flags |= O_CREAT; |
f546c780 | 111 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 112 | flags |= O_TRUNC; |
f546c780 | 113 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 114 | flags |= O_EXCL; |
115 | return flags; | |
116 | } | |
117 | ||
a13880bb | 118 | static const char * |
119 | string_from_portable(int pflags) | |
120 | { | |
121 | static char ret[128]; | |
122 | ||
123 | *ret = '\0'; | |
124 | ||
125 | #define PAPPEND(str) { \ | |
126 | if (*ret != '\0') \ | |
127 | strlcat(ret, ",", sizeof(ret)); \ | |
128 | strlcat(ret, str, sizeof(ret)); \ | |
129 | } | |
130 | ||
131 | if (pflags & SSH2_FXF_READ) | |
132 | PAPPEND("READ") | |
133 | if (pflags & SSH2_FXF_WRITE) | |
134 | PAPPEND("WRITE") | |
135 | if (pflags & SSH2_FXF_CREAT) | |
136 | PAPPEND("CREATE") | |
137 | if (pflags & SSH2_FXF_TRUNC) | |
138 | PAPPEND("TRUNCATE") | |
139 | if (pflags & SSH2_FXF_EXCL) | |
140 | PAPPEND("EXCL") | |
141 | ||
142 | return ret; | |
143 | } | |
144 | ||
396c147e | 145 | static Attrib * |
b5e300c2 | 146 | get_attrib(void) |
147 | { | |
148 | return decode_attrib(&iqueue); | |
149 | } | |
150 | ||
151 | /* handle handles */ | |
152 | ||
153 | typedef struct Handle Handle; | |
154 | struct Handle { | |
155 | int use; | |
156 | DIR *dirp; | |
157 | int fd; | |
158 | char *name; | |
a13880bb | 159 | u_int64_t bytes_read, bytes_write; |
b5e300c2 | 160 | }; |
dce9bac5 | 161 | |
b5e300c2 | 162 | enum { |
163 | HANDLE_UNUSED, | |
164 | HANDLE_DIR, | |
165 | HANDLE_FILE | |
166 | }; | |
dce9bac5 | 167 | |
b5e300c2 | 168 | Handle handles[100]; |
169 | ||
396c147e | 170 | static void |
b5e300c2 | 171 | handle_init(void) |
172 | { | |
2ceb8101 | 173 | u_int i; |
dce9bac5 | 174 | |
184eed6a | 175 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
b5e300c2 | 176 | handles[i].use = HANDLE_UNUSED; |
177 | } | |
178 | ||
396c147e | 179 | static int |
b6c7b7b7 | 180 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 181 | { |
2ceb8101 | 182 | u_int i; |
dce9bac5 | 183 | |
184eed6a | 184 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
b5e300c2 | 185 | if (handles[i].use == HANDLE_UNUSED) { |
186 | handles[i].use = use; | |
187 | handles[i].dirp = dirp; | |
188 | handles[i].fd = fd; | |
3e2f2431 | 189 | handles[i].name = xstrdup(name); |
a13880bb | 190 | handles[i].bytes_read = handles[i].bytes_write = 0; |
b5e300c2 | 191 | return i; |
192 | } | |
193 | } | |
194 | return -1; | |
195 | } | |
196 | ||
396c147e | 197 | static int |
b5e300c2 | 198 | handle_is_ok(int i, int type) |
199 | { | |
2ceb8101 | 200 | return i >= 0 && (u_int)i < sizeof(handles)/sizeof(Handle) && |
f546c780 | 201 | handles[i].use == type; |
b5e300c2 | 202 | } |
203 | ||
396c147e | 204 | static int |
b5e300c2 | 205 | handle_to_string(int handle, char **stringp, int *hlenp) |
206 | { | |
b5e300c2 | 207 | if (stringp == NULL || hlenp == NULL) |
208 | return -1; | |
b5c334cc | 209 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 210 | put_u32(*stringp, handle); |
b5c334cc | 211 | *hlenp = sizeof(int32_t); |
b5e300c2 | 212 | return 0; |
213 | } | |
214 | ||
396c147e | 215 | static int |
b6c7b7b7 | 216 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 217 | { |
b5c334cc | 218 | int val; |
dce9bac5 | 219 | |
b5c334cc | 220 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 221 | return -1; |
51e7a012 | 222 | val = get_u32(handle); |
b5e300c2 | 223 | if (handle_is_ok(val, HANDLE_FILE) || |
224 | handle_is_ok(val, HANDLE_DIR)) | |
225 | return val; | |
226 | return -1; | |
227 | } | |
228 | ||
396c147e | 229 | static char * |
b5e300c2 | 230 | handle_to_name(int handle) |
231 | { | |
232 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
233 | handle_is_ok(handle, HANDLE_FILE)) | |
234 | return handles[handle].name; | |
235 | return NULL; | |
236 | } | |
237 | ||
396c147e | 238 | static DIR * |
b5e300c2 | 239 | handle_to_dir(int handle) |
240 | { | |
241 | if (handle_is_ok(handle, HANDLE_DIR)) | |
242 | return handles[handle].dirp; | |
243 | return NULL; | |
244 | } | |
245 | ||
396c147e | 246 | static int |
b5e300c2 | 247 | handle_to_fd(int handle) |
248 | { | |
2b87da3b | 249 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 250 | return handles[handle].fd; |
251 | return -1; | |
252 | } | |
253 | ||
a13880bb | 254 | static void |
255 | handle_update_read(int handle, ssize_t bytes) | |
256 | { | |
257 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
258 | handles[handle].bytes_read += bytes; | |
259 | } | |
260 | ||
261 | static void | |
262 | handle_update_write(int handle, ssize_t bytes) | |
263 | { | |
264 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
265 | handles[handle].bytes_write += bytes; | |
266 | } | |
267 | ||
268 | static u_int64_t | |
269 | handle_bytes_read(int handle) | |
270 | { | |
271 | if (handle_is_ok(handle, HANDLE_FILE)) | |
272 | return (handles[handle].bytes_read); | |
273 | return 0; | |
274 | } | |
275 | ||
276 | static u_int64_t | |
277 | handle_bytes_write(int handle) | |
278 | { | |
279 | if (handle_is_ok(handle, HANDLE_FILE)) | |
280 | return (handles[handle].bytes_write); | |
281 | return 0; | |
282 | } | |
283 | ||
396c147e | 284 | static int |
b5e300c2 | 285 | handle_close(int handle) |
286 | { | |
287 | int ret = -1; | |
dce9bac5 | 288 | |
b5e300c2 | 289 | if (handle_is_ok(handle, HANDLE_FILE)) { |
290 | ret = close(handles[handle].fd); | |
291 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 292 | xfree(handles[handle].name); |
b5e300c2 | 293 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
294 | ret = closedir(handles[handle].dirp); | |
295 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 296 | xfree(handles[handle].name); |
b5e300c2 | 297 | } else { |
298 | errno = ENOENT; | |
299 | } | |
300 | return ret; | |
301 | } | |
302 | ||
a13880bb | 303 | static void |
304 | handle_log_close(int handle, char *emsg) | |
305 | { | |
306 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
307 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
308 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
309 | handle_to_name(handle), | |
310 | handle_bytes_read(handle), handle_bytes_write(handle)); | |
311 | } else { | |
312 | logit("%s%sclosedir \"%s\"", | |
313 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
314 | handle_to_name(handle)); | |
315 | } | |
316 | } | |
317 | ||
318 | static void | |
319 | handle_log_exit(void) | |
320 | { | |
321 | u_int i; | |
322 | ||
323 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) | |
324 | if (handles[i].use != HANDLE_UNUSED) | |
325 | handle_log_close(i, "forced"); | |
326 | } | |
327 | ||
396c147e | 328 | static int |
b5e300c2 | 329 | get_handle(void) |
330 | { | |
331 | char *handle; | |
f546c780 | 332 | int val = -1; |
bcbf86ec | 333 | u_int hlen; |
dce9bac5 | 334 | |
b5e300c2 | 335 | handle = get_string(&hlen); |
f546c780 | 336 | if (hlen < 256) |
337 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 338 | xfree(handle); |
339 | return val; | |
340 | } | |
341 | ||
342 | /* send replies */ | |
343 | ||
396c147e | 344 | static void |
b5e300c2 | 345 | send_msg(Buffer *m) |
346 | { | |
347 | int mlen = buffer_len(m); | |
dce9bac5 | 348 | |
b5e300c2 | 349 | buffer_put_int(&oqueue, mlen); |
350 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
351 | buffer_consume(m, mlen); | |
352 | } | |
353 | ||
a13880bb | 354 | static const char * |
355 | status_to_message(u_int32_t status) | |
b5e300c2 | 356 | { |
3a7fe5ba | 357 | const char *status_messages[] = { |
358 | "Success", /* SSH_FX_OK */ | |
359 | "End of file", /* SSH_FX_EOF */ | |
360 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
361 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
362 | "Failure", /* SSH_FX_FAILURE */ | |
363 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
364 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
365 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
366 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
367 | "Unknown error" /* Others */ | |
368 | }; | |
a13880bb | 369 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
370 | } | |
dce9bac5 | 371 | |
a13880bb | 372 | static void |
373 | send_status(u_int32_t id, u_int32_t status) | |
374 | { | |
375 | Buffer msg; | |
376 | ||
377 | debug3("request %u: sent status %u", id, status); | |
378 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
379 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
380 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 381 | buffer_init(&msg); |
f546c780 | 382 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 383 | buffer_put_int(&msg, id); |
ca75d7de | 384 | buffer_put_int(&msg, status); |
3a7fe5ba | 385 | if (version >= 3) { |
a13880bb | 386 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 387 | buffer_put_cstring(&msg, ""); |
388 | } | |
b5e300c2 | 389 | send_msg(&msg); |
390 | buffer_free(&msg); | |
391 | } | |
396c147e | 392 | static void |
b6c7b7b7 | 393 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 394 | { |
395 | Buffer msg; | |
dce9bac5 | 396 | |
b5e300c2 | 397 | buffer_init(&msg); |
398 | buffer_put_char(&msg, type); | |
399 | buffer_put_int(&msg, id); | |
400 | buffer_put_string(&msg, data, dlen); | |
401 | send_msg(&msg); | |
402 | buffer_free(&msg); | |
403 | } | |
404 | ||
396c147e | 405 | static void |
b6c7b7b7 | 406 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 407 | { |
a13880bb | 408 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 409 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 410 | } |
411 | ||
396c147e | 412 | static void |
b5e300c2 | 413 | send_handle(u_int32_t id, int handle) |
414 | { | |
415 | char *string; | |
416 | int hlen; | |
dce9bac5 | 417 | |
b5e300c2 | 418 | handle_to_string(handle, &string, &hlen); |
a13880bb | 419 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 420 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 421 | xfree(string); |
422 | } | |
423 | ||
396c147e | 424 | static void |
b6c7b7b7 | 425 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 426 | { |
427 | Buffer msg; | |
428 | int i; | |
dce9bac5 | 429 | |
b5e300c2 | 430 | buffer_init(&msg); |
f546c780 | 431 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 432 | buffer_put_int(&msg, id); |
433 | buffer_put_int(&msg, count); | |
a13880bb | 434 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 435 | for (i = 0; i < count; i++) { |
436 | buffer_put_cstring(&msg, stats[i].name); | |
437 | buffer_put_cstring(&msg, stats[i].long_name); | |
438 | encode_attrib(&msg, &stats[i].attrib); | |
439 | } | |
440 | send_msg(&msg); | |
441 | buffer_free(&msg); | |
442 | } | |
443 | ||
396c147e | 444 | static void |
b6c7b7b7 | 445 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 446 | { |
447 | Buffer msg; | |
dce9bac5 | 448 | |
a13880bb | 449 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 450 | buffer_init(&msg); |
f546c780 | 451 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 452 | buffer_put_int(&msg, id); |
453 | encode_attrib(&msg, a); | |
454 | send_msg(&msg); | |
455 | buffer_free(&msg); | |
456 | } | |
457 | ||
458 | /* parse incoming */ | |
459 | ||
396c147e | 460 | static void |
b5e300c2 | 461 | process_init(void) |
462 | { | |
463 | Buffer msg; | |
b5e300c2 | 464 | |
802d93bb | 465 | version = get_int(); |
a13880bb | 466 | verbose("received client version %d", version); |
b5e300c2 | 467 | buffer_init(&msg); |
f546c780 | 468 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
469 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 470 | send_msg(&msg); |
471 | buffer_free(&msg); | |
472 | } | |
473 | ||
396c147e | 474 | static void |
b5e300c2 | 475 | process_open(void) |
476 | { | |
477 | u_int32_t id, pflags; | |
478 | Attrib *a; | |
479 | char *name; | |
f546c780 | 480 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 481 | |
482 | id = get_int(); | |
a13880bb | 483 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 484 | name = get_string(NULL); |
f546c780 | 485 | pflags = get_int(); /* portable flags */ |
b5e300c2 | 486 | a = get_attrib(); |
487 | flags = flags_from_portable(pflags); | |
f546c780 | 488 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 489 | logit("open \"%s\" flags %s mode 0%o", |
490 | name, string_from_portable(pflags), mode); | |
b5e300c2 | 491 | fd = open(name, flags, mode); |
492 | if (fd < 0) { | |
493 | status = errno_to_portable(errno); | |
494 | } else { | |
3e2f2431 | 495 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 496 | if (handle < 0) { |
497 | close(fd); | |
498 | } else { | |
499 | send_handle(id, handle); | |
f546c780 | 500 | status = SSH2_FX_OK; |
b5e300c2 | 501 | } |
502 | } | |
f546c780 | 503 | if (status != SSH2_FX_OK) |
b5e300c2 | 504 | send_status(id, status); |
505 | xfree(name); | |
506 | } | |
507 | ||
396c147e | 508 | static void |
b5e300c2 | 509 | process_close(void) |
510 | { | |
511 | u_int32_t id; | |
f546c780 | 512 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 513 | |
514 | id = get_int(); | |
515 | handle = get_handle(); | |
a13880bb | 516 | debug3("request %u: close handle %u", id, handle); |
517 | handle_log_close(handle, NULL); | |
b5e300c2 | 518 | ret = handle_close(handle); |
f546c780 | 519 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 520 | send_status(id, status); |
521 | } | |
522 | ||
396c147e | 523 | static void |
b5e300c2 | 524 | process_read(void) |
525 | { | |
526 | char buf[64*1024]; | |
f546c780 | 527 | u_int32_t id, len; |
528 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 529 | u_int64_t off; |
530 | ||
531 | id = get_int(); | |
532 | handle = get_handle(); | |
f546c780 | 533 | off = get_int64(); |
b5e300c2 | 534 | len = get_int(); |
535 | ||
a13880bb | 536 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
537 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 538 | if (len > sizeof buf) { |
539 | len = sizeof buf; | |
a13880bb | 540 | debug2("read change len %d", len); |
b5e300c2 | 541 | } |
542 | fd = handle_to_fd(handle); | |
543 | if (fd >= 0) { | |
544 | if (lseek(fd, off, SEEK_SET) < 0) { | |
545 | error("process_read: seek failed"); | |
546 | status = errno_to_portable(errno); | |
547 | } else { | |
548 | ret = read(fd, buf, len); | |
549 | if (ret < 0) { | |
550 | status = errno_to_portable(errno); | |
551 | } else if (ret == 0) { | |
f546c780 | 552 | status = SSH2_FX_EOF; |
b5e300c2 | 553 | } else { |
554 | send_data(id, buf, ret); | |
f546c780 | 555 | status = SSH2_FX_OK; |
a13880bb | 556 | handle_update_read(handle, ret); |
b5e300c2 | 557 | } |
558 | } | |
559 | } | |
f546c780 | 560 | if (status != SSH2_FX_OK) |
b5e300c2 | 561 | send_status(id, status); |
562 | } | |
563 | ||
396c147e | 564 | static void |
b5e300c2 | 565 | process_write(void) |
566 | { | |
f546c780 | 567 | u_int32_t id; |
b5e300c2 | 568 | u_int64_t off; |
bcbf86ec | 569 | u_int len; |
f546c780 | 570 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 571 | char *data; |
572 | ||
573 | id = get_int(); | |
574 | handle = get_handle(); | |
f546c780 | 575 | off = get_int64(); |
b5e300c2 | 576 | data = get_string(&len); |
577 | ||
a13880bb | 578 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
579 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 580 | fd = handle_to_fd(handle); |
581 | if (fd >= 0) { | |
582 | if (lseek(fd, off, SEEK_SET) < 0) { | |
583 | status = errno_to_portable(errno); | |
584 | error("process_write: seek failed"); | |
585 | } else { | |
586 | /* XXX ATOMICIO ? */ | |
587 | ret = write(fd, data, len); | |
2ceb8101 | 588 | if (ret < 0) { |
b5e300c2 | 589 | error("process_write: write failed"); |
590 | status = errno_to_portable(errno); | |
2ceb8101 | 591 | } else if ((size_t)ret == len) { |
f546c780 | 592 | status = SSH2_FX_OK; |
a13880bb | 593 | handle_update_write(handle, ret); |
b5e300c2 | 594 | } else { |
a13880bb | 595 | debug2("nothing at all written"); |
b5e300c2 | 596 | } |
597 | } | |
598 | } | |
599 | send_status(id, status); | |
600 | xfree(data); | |
601 | } | |
602 | ||
396c147e | 603 | static void |
b5e300c2 | 604 | process_do_stat(int do_lstat) |
605 | { | |
b5c334cc | 606 | Attrib a; |
b5e300c2 | 607 | struct stat st; |
608 | u_int32_t id; | |
609 | char *name; | |
f546c780 | 610 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 611 | |
612 | id = get_int(); | |
613 | name = get_string(NULL); | |
a13880bb | 614 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
615 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 616 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
617 | if (ret < 0) { | |
618 | status = errno_to_portable(errno); | |
619 | } else { | |
b5c334cc | 620 | stat_to_attrib(&st, &a); |
621 | send_attrib(id, &a); | |
f546c780 | 622 | status = SSH2_FX_OK; |
b5e300c2 | 623 | } |
f546c780 | 624 | if (status != SSH2_FX_OK) |
b5e300c2 | 625 | send_status(id, status); |
626 | xfree(name); | |
627 | } | |
628 | ||
396c147e | 629 | static void |
b5e300c2 | 630 | process_stat(void) |
631 | { | |
632 | process_do_stat(0); | |
633 | } | |
634 | ||
396c147e | 635 | static void |
b5e300c2 | 636 | process_lstat(void) |
637 | { | |
638 | process_do_stat(1); | |
639 | } | |
640 | ||
396c147e | 641 | static void |
b5e300c2 | 642 | process_fstat(void) |
643 | { | |
b5c334cc | 644 | Attrib a; |
b5e300c2 | 645 | struct stat st; |
646 | u_int32_t id; | |
f546c780 | 647 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 648 | |
649 | id = get_int(); | |
650 | handle = get_handle(); | |
a13880bb | 651 | debug("request %u: fstat \"%s\" (handle %u)", |
652 | id, handle_to_name(handle), handle); | |
b5e300c2 | 653 | fd = handle_to_fd(handle); |
654 | if (fd >= 0) { | |
655 | ret = fstat(fd, &st); | |
656 | if (ret < 0) { | |
657 | status = errno_to_portable(errno); | |
658 | } else { | |
b5c334cc | 659 | stat_to_attrib(&st, &a); |
660 | send_attrib(id, &a); | |
f546c780 | 661 | status = SSH2_FX_OK; |
b5e300c2 | 662 | } |
663 | } | |
f546c780 | 664 | if (status != SSH2_FX_OK) |
b5e300c2 | 665 | send_status(id, status); |
666 | } | |
667 | ||
396c147e | 668 | static struct timeval * |
b6c7b7b7 | 669 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 670 | { |
671 | static struct timeval tv[2]; | |
dce9bac5 | 672 | |
b5e300c2 | 673 | tv[0].tv_sec = a->atime; |
674 | tv[0].tv_usec = 0; | |
675 | tv[1].tv_sec = a->mtime; | |
676 | tv[1].tv_usec = 0; | |
677 | return tv; | |
678 | } | |
679 | ||
396c147e | 680 | static void |
b5e300c2 | 681 | process_setstat(void) |
682 | { | |
683 | Attrib *a; | |
684 | u_int32_t id; | |
685 | char *name; | |
9906a836 | 686 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 687 | |
688 | id = get_int(); | |
689 | name = get_string(NULL); | |
690 | a = get_attrib(); | |
a13880bb | 691 | debug("request %u: setstat name \"%s\"", id, name); |
cb476289 | 692 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 693 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 694 | ret = truncate(name, a->size); |
695 | if (ret == -1) | |
696 | status = errno_to_portable(errno); | |
697 | } | |
f546c780 | 698 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 699 | logit("set \"%s\" mode %04o", name, a->perm); |
b5e300c2 | 700 | ret = chmod(name, a->perm & 0777); |
701 | if (ret == -1) | |
702 | status = errno_to_portable(errno); | |
703 | } | |
f546c780 | 704 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 705 | char buf[64]; |
706 | time_t t = a->mtime; | |
707 | ||
708 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
709 | localtime(&t)); | |
710 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 711 | ret = utimes(name, attrib_to_tv(a)); |
712 | if (ret == -1) | |
713 | status = errno_to_portable(errno); | |
714 | } | |
408ba72f | 715 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 716 | logit("set \"%s\" owner %lu group %lu", name, |
717 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 718 | ret = chown(name, a->uid, a->gid); |
719 | if (ret == -1) | |
720 | status = errno_to_portable(errno); | |
721 | } | |
b5e300c2 | 722 | send_status(id, status); |
723 | xfree(name); | |
724 | } | |
725 | ||
396c147e | 726 | static void |
b5e300c2 | 727 | process_fsetstat(void) |
728 | { | |
729 | Attrib *a; | |
730 | u_int32_t id; | |
731 | int handle, fd, ret; | |
f546c780 | 732 | int status = SSH2_FX_OK; |
16e538d4 | 733 | |
b5e300c2 | 734 | id = get_int(); |
735 | handle = get_handle(); | |
736 | a = get_attrib(); | |
a13880bb | 737 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 738 | fd = handle_to_fd(handle); |
a13880bb | 739 | if (fd < 0) { |
f546c780 | 740 | status = SSH2_FX_FAILURE; |
b5e300c2 | 741 | } else { |
a13880bb | 742 | char *name = handle_to_name(handle); |
743 | ||
cb476289 | 744 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 745 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 746 | ret = ftruncate(fd, a->size); |
747 | if (ret == -1) | |
748 | status = errno_to_portable(errno); | |
749 | } | |
f546c780 | 750 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 751 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 752 | #ifdef HAVE_FCHMOD |
b5e300c2 | 753 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 754 | #else |
c33f0b36 | 755 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 756 | #endif |
b5e300c2 | 757 | if (ret == -1) |
758 | status = errno_to_portable(errno); | |
759 | } | |
f546c780 | 760 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 761 | char buf[64]; |
762 | time_t t = a->mtime; | |
763 | ||
764 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
765 | localtime(&t)); | |
766 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 767 | #ifdef HAVE_FUTIMES |
768 | ret = futimes(fd, attrib_to_tv(a)); | |
769 | #else | |
770 | ret = utimes(name, attrib_to_tv(a)); | |
771 | #endif | |
772 | if (ret == -1) | |
773 | status = errno_to_portable(errno); | |
774 | } | |
408ba72f | 775 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 776 | logit("set \"%s\" owner %lu group %lu", name, |
777 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 778 | #ifdef HAVE_FCHOWN |
408ba72f | 779 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 780 | #else |
781 | ret = chown(name, a->uid, a->gid); | |
782 | #endif | |
408ba72f | 783 | if (ret == -1) |
784 | status = errno_to_portable(errno); | |
785 | } | |
b5e300c2 | 786 | } |
787 | send_status(id, status); | |
788 | } | |
789 | ||
396c147e | 790 | static void |
b5e300c2 | 791 | process_opendir(void) |
792 | { | |
793 | DIR *dirp = NULL; | |
794 | char *path; | |
f546c780 | 795 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 796 | u_int32_t id; |
797 | ||
798 | id = get_int(); | |
799 | path = get_string(NULL); | |
a13880bb | 800 | debug3("request %u: opendir", id); |
801 | logit("opendir \"%s\"", path); | |
2b87da3b | 802 | dirp = opendir(path); |
b5e300c2 | 803 | if (dirp == NULL) { |
804 | status = errno_to_portable(errno); | |
805 | } else { | |
3e2f2431 | 806 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 807 | if (handle < 0) { |
808 | closedir(dirp); | |
809 | } else { | |
810 | send_handle(id, handle); | |
f546c780 | 811 | status = SSH2_FX_OK; |
b5e300c2 | 812 | } |
2b87da3b | 813 | |
b5e300c2 | 814 | } |
f546c780 | 815 | if (status != SSH2_FX_OK) |
b5e300c2 | 816 | send_status(id, status); |
817 | xfree(path); | |
818 | } | |
819 | ||
396c147e | 820 | static void |
b5e300c2 | 821 | process_readdir(void) |
822 | { | |
823 | DIR *dirp; | |
824 | struct dirent *dp; | |
825 | char *path; | |
826 | int handle; | |
827 | u_int32_t id; | |
828 | ||
829 | id = get_int(); | |
830 | handle = get_handle(); | |
a13880bb | 831 | debug("request %u: readdir \"%s\" (handle %d)", id, |
832 | handle_to_name(handle), handle); | |
b5e300c2 | 833 | dirp = handle_to_dir(handle); |
834 | path = handle_to_name(handle); | |
835 | if (dirp == NULL || path == NULL) { | |
f546c780 | 836 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 837 | } else { |
b5e300c2 | 838 | struct stat st; |
a13880bb | 839 | char pathname[MAXPATHLEN]; |
b5e300c2 | 840 | Stat *stats; |
841 | int nstats = 10, count = 0, i; | |
9906a836 | 842 | |
52e3daed | 843 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 844 | while ((dp = readdir(dirp)) != NULL) { |
845 | if (count >= nstats) { | |
846 | nstats *= 2; | |
c5d10563 | 847 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 848 | } |
849 | /* XXX OVERFLOW ? */ | |
88690211 | 850 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
851 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 852 | if (lstat(pathname, &st) < 0) |
853 | continue; | |
b5c334cc | 854 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 855 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 856 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 857 | count++; |
858 | /* send up to 100 entries in one message */ | |
b5c334cc | 859 | /* XXX check packet size instead */ |
b5e300c2 | 860 | if (count == 100) |
861 | break; | |
862 | } | |
f546c780 | 863 | if (count > 0) { |
864 | send_names(id, count, stats); | |
184eed6a | 865 | for (i = 0; i < count; i++) { |
f546c780 | 866 | xfree(stats[i].name); |
867 | xfree(stats[i].long_name); | |
868 | } | |
869 | } else { | |
870 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 871 | } |
872 | xfree(stats); | |
873 | } | |
874 | } | |
875 | ||
396c147e | 876 | static void |
b5e300c2 | 877 | process_remove(void) |
878 | { | |
879 | char *name; | |
880 | u_int32_t id; | |
f546c780 | 881 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 882 | int ret; |
883 | ||
884 | id = get_int(); | |
885 | name = get_string(NULL); | |
a13880bb | 886 | debug3("request %u: remove", id); |
887 | logit("remove name \"%s\"", name); | |
67b0facb | 888 | ret = unlink(name); |
f546c780 | 889 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 890 | send_status(id, status); |
891 | xfree(name); | |
892 | } | |
893 | ||
396c147e | 894 | static void |
b5e300c2 | 895 | process_mkdir(void) |
896 | { | |
897 | Attrib *a; | |
898 | u_int32_t id; | |
899 | char *name; | |
f546c780 | 900 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 901 | |
902 | id = get_int(); | |
903 | name = get_string(NULL); | |
904 | a = get_attrib(); | |
f546c780 | 905 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
906 | a->perm & 0777 : 0777; | |
a13880bb | 907 | debug3("request %u: mkdir", id); |
908 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
b5e300c2 | 909 | ret = mkdir(name, mode); |
f546c780 | 910 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 911 | send_status(id, status); |
912 | xfree(name); | |
913 | } | |
914 | ||
396c147e | 915 | static void |
b5e300c2 | 916 | process_rmdir(void) |
917 | { | |
918 | u_int32_t id; | |
919 | char *name; | |
920 | int ret, status; | |
921 | ||
922 | id = get_int(); | |
923 | name = get_string(NULL); | |
a13880bb | 924 | debug3("request %u: rmdir", id); |
925 | logit("rmdir name \"%s\"", name); | |
b5e300c2 | 926 | ret = rmdir(name); |
f546c780 | 927 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 928 | send_status(id, status); |
929 | xfree(name); | |
930 | } | |
931 | ||
396c147e | 932 | static void |
b5e300c2 | 933 | process_realpath(void) |
934 | { | |
935 | char resolvedname[MAXPATHLEN]; | |
936 | u_int32_t id; | |
937 | char *path; | |
938 | ||
939 | id = get_int(); | |
940 | path = get_string(NULL); | |
6b523bae | 941 | if (path[0] == '\0') { |
942 | xfree(path); | |
943 | path = xstrdup("."); | |
944 | } | |
a13880bb | 945 | debug3("request %u: realpath", id); |
946 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 947 | if (realpath(path, resolvedname) == NULL) { |
948 | send_status(id, errno_to_portable(errno)); | |
949 | } else { | |
950 | Stat s; | |
951 | attrib_clear(&s.attrib); | |
952 | s.name = s.long_name = resolvedname; | |
953 | send_names(id, 1, &s); | |
954 | } | |
955 | xfree(path); | |
956 | } | |
957 | ||
396c147e | 958 | static void |
b5e300c2 | 959 | process_rename(void) |
960 | { | |
961 | u_int32_t id; | |
962 | char *oldpath, *newpath; | |
f2f28f1f | 963 | int status; |
fd77a40f | 964 | struct stat sb; |
b5e300c2 | 965 | |
966 | id = get_int(); | |
967 | oldpath = get_string(NULL); | |
968 | newpath = get_string(NULL); | |
a13880bb | 969 | debug3("request %u: rename", id); |
970 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 971 | status = SSH2_FX_FAILURE; |
972 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 973 | status = errno_to_portable(errno); |
fd77a40f | 974 | else if (S_ISREG(sb.st_mode)) { |
975 | /* Race-free rename of regular files */ | |
dc5888bf | 976 | if (link(oldpath, newpath) == -1) { |
cd698186 | 977 | if (errno == EOPNOTSUPP |
978 | #ifdef LINK_OPNOTSUPP_ERRNO | |
979 | || errno == LINK_OPNOTSUPP_ERRNO | |
980 | #endif | |
981 | ) { | |
dc5888bf | 982 | struct stat st; |
983 | ||
984 | /* | |
985 | * fs doesn't support links, so fall back to | |
986 | * stat+rename. This is racy. | |
987 | */ | |
988 | if (stat(newpath, &st) == -1) { | |
989 | if (rename(oldpath, newpath) == -1) | |
990 | status = | |
991 | errno_to_portable(errno); | |
992 | else | |
993 | status = SSH2_FX_OK; | |
994 | } | |
995 | } else { | |
996 | status = errno_to_portable(errno); | |
997 | } | |
998 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 999 | status = errno_to_portable(errno); |
1000 | /* clean spare link */ | |
1001 | unlink(newpath); | |
1002 | } else | |
1003 | status = SSH2_FX_OK; | |
1004 | } else if (stat(newpath, &sb) == -1) { | |
1005 | if (rename(oldpath, newpath) == -1) | |
1006 | status = errno_to_portable(errno); | |
1007 | else | |
1008 | status = SSH2_FX_OK; | |
1009 | } | |
b5e300c2 | 1010 | send_status(id, status); |
1011 | xfree(oldpath); | |
1012 | xfree(newpath); | |
1013 | } | |
1014 | ||
396c147e | 1015 | static void |
3a7fe5ba | 1016 | process_readlink(void) |
1017 | { | |
1018 | u_int32_t id; | |
362df52e | 1019 | int len; |
ca75d7de | 1020 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1021 | char *path; |
1022 | ||
1023 | id = get_int(); | |
1024 | path = get_string(NULL); | |
a13880bb | 1025 | debug3("request %u: readlink", id); |
1026 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1027 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1028 | send_status(id, errno_to_portable(errno)); |
1029 | else { | |
1030 | Stat s; | |
184eed6a | 1031 | |
ca75d7de | 1032 | buf[len] = '\0'; |
3a7fe5ba | 1033 | attrib_clear(&s.attrib); |
ca75d7de | 1034 | s.name = s.long_name = buf; |
3a7fe5ba | 1035 | send_names(id, 1, &s); |
1036 | } | |
1037 | xfree(path); | |
1038 | } | |
1039 | ||
396c147e | 1040 | static void |
3a7fe5ba | 1041 | process_symlink(void) |
1042 | { | |
1043 | u_int32_t id; | |
3a7fe5ba | 1044 | char *oldpath, *newpath; |
f2f28f1f | 1045 | int ret, status; |
3a7fe5ba | 1046 | |
1047 | id = get_int(); | |
1048 | oldpath = get_string(NULL); | |
1049 | newpath = get_string(NULL); | |
a13880bb | 1050 | debug3("request %u: symlink", id); |
1051 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1052 | /* this will fail if 'newpath' exists */ |
1053 | ret = symlink(oldpath, newpath); | |
1054 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 1055 | send_status(id, status); |
1056 | xfree(oldpath); | |
1057 | xfree(newpath); | |
1058 | } | |
1059 | ||
396c147e | 1060 | static void |
f546c780 | 1061 | process_extended(void) |
1062 | { | |
1063 | u_int32_t id; | |
1064 | char *request; | |
1065 | ||
1066 | id = get_int(); | |
1067 | request = get_string(NULL); | |
1068 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
1069 | xfree(request); | |
1070 | } | |
b5e300c2 | 1071 | |
1072 | /* stolen from ssh-agent */ | |
1073 | ||
396c147e | 1074 | static void |
b5e300c2 | 1075 | process(void) |
1076 | { | |
1e3b8b07 | 1077 | u_int msg_len; |
9b4ac641 | 1078 | u_int buf_len; |
1079 | u_int consumed; | |
1e3b8b07 | 1080 | u_int type; |
1081 | u_char *cp; | |
b5e300c2 | 1082 | |
9b4ac641 | 1083 | buf_len = buffer_len(&iqueue); |
1084 | if (buf_len < 5) | |
b5e300c2 | 1085 | return; /* Incomplete message. */ |
20905a8e | 1086 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1087 | msg_len = get_u32(cp); |
3eee3b86 | 1088 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1089 | error("bad message from %s local user %s", |
1090 | client_addr, pw->pw_name); | |
1091 | cleanup_exit(11); | |
b5e300c2 | 1092 | } |
9b4ac641 | 1093 | if (buf_len < msg_len + 4) |
b5e300c2 | 1094 | return; |
1095 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1096 | buf_len -= 4; |
b5e300c2 | 1097 | type = buffer_get_char(&iqueue); |
1098 | switch (type) { | |
f546c780 | 1099 | case SSH2_FXP_INIT: |
b5e300c2 | 1100 | process_init(); |
1101 | break; | |
f546c780 | 1102 | case SSH2_FXP_OPEN: |
b5e300c2 | 1103 | process_open(); |
1104 | break; | |
f546c780 | 1105 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1106 | process_close(); |
1107 | break; | |
f546c780 | 1108 | case SSH2_FXP_READ: |
b5e300c2 | 1109 | process_read(); |
1110 | break; | |
f546c780 | 1111 | case SSH2_FXP_WRITE: |
b5e300c2 | 1112 | process_write(); |
1113 | break; | |
f546c780 | 1114 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1115 | process_lstat(); |
1116 | break; | |
f546c780 | 1117 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1118 | process_fstat(); |
1119 | break; | |
f546c780 | 1120 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1121 | process_setstat(); |
1122 | break; | |
f546c780 | 1123 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1124 | process_fsetstat(); |
1125 | break; | |
f546c780 | 1126 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1127 | process_opendir(); |
1128 | break; | |
f546c780 | 1129 | case SSH2_FXP_READDIR: |
b5e300c2 | 1130 | process_readdir(); |
1131 | break; | |
f546c780 | 1132 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1133 | process_remove(); |
1134 | break; | |
f546c780 | 1135 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1136 | process_mkdir(); |
1137 | break; | |
f546c780 | 1138 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1139 | process_rmdir(); |
1140 | break; | |
f546c780 | 1141 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1142 | process_realpath(); |
1143 | break; | |
f546c780 | 1144 | case SSH2_FXP_STAT: |
b5e300c2 | 1145 | process_stat(); |
1146 | break; | |
f546c780 | 1147 | case SSH2_FXP_RENAME: |
b5e300c2 | 1148 | process_rename(); |
1149 | break; | |
3a7fe5ba | 1150 | case SSH2_FXP_READLINK: |
1151 | process_readlink(); | |
1152 | break; | |
1153 | case SSH2_FXP_SYMLINK: | |
1154 | process_symlink(); | |
1155 | break; | |
f546c780 | 1156 | case SSH2_FXP_EXTENDED: |
1157 | process_extended(); | |
1158 | break; | |
b5e300c2 | 1159 | default: |
1160 | error("Unknown message %d", type); | |
1161 | break; | |
1162 | } | |
9b4ac641 | 1163 | /* discard the remaining bytes from the current packet */ |
1164 | if (buf_len < buffer_len(&iqueue)) | |
a13880bb | 1165 | fatal("iqueue grew unexpectedly"); |
9b4ac641 | 1166 | consumed = buf_len - buffer_len(&iqueue); |
1167 | if (msg_len < consumed) | |
1168 | fatal("msg_len %d < consumed %d", msg_len, consumed); | |
1169 | if (msg_len > consumed) | |
1170 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1171 | } |
1172 | ||
a13880bb | 1173 | /* Cleanup handler that logs active handles upon normal exit */ |
1174 | void | |
1175 | cleanup_exit(int i) | |
1176 | { | |
1177 | if (pw != NULL && client_addr != NULL) { | |
1178 | handle_log_exit(); | |
1179 | logit("session closed for local user %s from [%s]", | |
1180 | pw->pw_name, client_addr); | |
1181 | } | |
1182 | _exit(i); | |
1183 | } | |
1184 | ||
1185 | static void | |
1186 | usage(void) | |
1187 | { | |
1188 | extern char *__progname; | |
1189 | ||
1190 | fprintf(stderr, | |
1191 | "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname); | |
1192 | exit(1); | |
1193 | } | |
1194 | ||
b5e300c2 | 1195 | int |
a13880bb | 1196 | main(int argc, char **argv) |
b5e300c2 | 1197 | { |
c8d75031 | 1198 | fd_set *rset, *wset; |
a13880bb | 1199 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1200 | ssize_t len, olen, set_size; |
a13880bb | 1201 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
1202 | char *cp; | |
1203 | ||
1204 | extern int optind; | |
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 | } |