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ffa517a8 | 1 | /* $OpenBSD: sftp-server.c,v 1.68 2006/07/26 13:57:17 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> | |
536c14e8 | 20 | #include <sys/param.h> |
4095f623 | 21 | #include <sys/stat.h> |
e264ac72 | 22 | #ifdef HAVE_SYS_TIME_H |
23 | # include <sys/time.h> | |
24 | #endif | |
68e39d38 | 25 | |
26 | #include <dirent.h> | |
028094f4 | 27 | #include <errno.h> |
d3221cca | 28 | #include <fcntl.h> |
b1842393 | 29 | #include <pwd.h> |
ffa517a8 | 30 | #include <stdlib.h> |
00146caa | 31 | #include <string.h> |
b0f6943a | 32 | #include <time.h> |
00146caa | 33 | #include <unistd.h> |
b5e300c2 | 34 | |
b5e300c2 | 35 | #include "buffer.h" |
36 | #include "bufaux.h" | |
42f11eb2 | 37 | #include "log.h" |
b5e300c2 | 38 | #include "xmalloc.h" |
fd6168c1 | 39 | #include "misc.h" |
a13880bb | 40 | #include "uidswap.h" |
b5e300c2 | 41 | |
f546c780 | 42 | #include "sftp.h" |
61e96248 | 43 | #include "sftp-common.h" |
b5e300c2 | 44 | |
45 | /* helper */ | |
f546c780 | 46 | #define get_int64() buffer_get_int64(&iqueue); |
b5e300c2 | 47 | #define get_int() buffer_get_int(&iqueue); |
48 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); | |
b5e300c2 | 49 | |
a13880bb | 50 | /* Our verbosity */ |
51 | LogLevel log_level = SYSLOG_LEVEL_ERROR; | |
52 | ||
53 | /* Our client */ | |
54 | struct passwd *pw = NULL; | |
55 | char *client_addr = NULL; | |
260d427b | 56 | |
b5e300c2 | 57 | /* input and output queue */ |
58 | Buffer iqueue; | |
59 | Buffer oqueue; | |
60 | ||
3a7fe5ba | 61 | /* Version of client */ |
62 | int version; | |
63 | ||
d7ded285 | 64 | /* portable attributes, etc. */ |
b5e300c2 | 65 | |
b5e300c2 | 66 | typedef struct Stat Stat; |
67 | ||
61e96248 | 68 | struct Stat { |
b5e300c2 | 69 | char *name; |
70 | char *long_name; | |
71 | Attrib attrib; | |
72 | }; | |
73 | ||
396c147e | 74 | static int |
b5e300c2 | 75 | errno_to_portable(int unixerrno) |
76 | { | |
77 | int ret = 0; | |
dce9bac5 | 78 | |
b5e300c2 | 79 | switch (unixerrno) { |
80 | case 0: | |
f546c780 | 81 | ret = SSH2_FX_OK; |
b5e300c2 | 82 | break; |
83 | case ENOENT: | |
84 | case ENOTDIR: | |
85 | case EBADF: | |
86 | case ELOOP: | |
f546c780 | 87 | ret = SSH2_FX_NO_SUCH_FILE; |
b5e300c2 | 88 | break; |
89 | case EPERM: | |
90 | case EACCES: | |
91 | case EFAULT: | |
f546c780 | 92 | ret = SSH2_FX_PERMISSION_DENIED; |
b5e300c2 | 93 | break; |
94 | case ENAMETOOLONG: | |
95 | case EINVAL: | |
f546c780 | 96 | ret = SSH2_FX_BAD_MESSAGE; |
b5e300c2 | 97 | break; |
98 | default: | |
f546c780 | 99 | ret = SSH2_FX_FAILURE; |
b5e300c2 | 100 | break; |
101 | } | |
102 | return ret; | |
103 | } | |
104 | ||
396c147e | 105 | static int |
b5e300c2 | 106 | flags_from_portable(int pflags) |
107 | { | |
108 | int flags = 0; | |
dce9bac5 | 109 | |
79ddf6db | 110 | if ((pflags & SSH2_FXF_READ) && |
111 | (pflags & SSH2_FXF_WRITE)) { | |
b5e300c2 | 112 | flags = O_RDWR; |
f546c780 | 113 | } else if (pflags & SSH2_FXF_READ) { |
b5e300c2 | 114 | flags = O_RDONLY; |
f546c780 | 115 | } else if (pflags & SSH2_FXF_WRITE) { |
b5e300c2 | 116 | flags = O_WRONLY; |
117 | } | |
f546c780 | 118 | if (pflags & SSH2_FXF_CREAT) |
b5e300c2 | 119 | flags |= O_CREAT; |
f546c780 | 120 | if (pflags & SSH2_FXF_TRUNC) |
b5e300c2 | 121 | flags |= O_TRUNC; |
f546c780 | 122 | if (pflags & SSH2_FXF_EXCL) |
b5e300c2 | 123 | flags |= O_EXCL; |
124 | return flags; | |
125 | } | |
126 | ||
a13880bb | 127 | static const char * |
128 | string_from_portable(int pflags) | |
129 | { | |
130 | static char ret[128]; | |
131 | ||
132 | *ret = '\0'; | |
133 | ||
134 | #define PAPPEND(str) { \ | |
135 | if (*ret != '\0') \ | |
136 | strlcat(ret, ",", sizeof(ret)); \ | |
137 | strlcat(ret, str, sizeof(ret)); \ | |
138 | } | |
139 | ||
140 | if (pflags & SSH2_FXF_READ) | |
141 | PAPPEND("READ") | |
142 | if (pflags & SSH2_FXF_WRITE) | |
143 | PAPPEND("WRITE") | |
144 | if (pflags & SSH2_FXF_CREAT) | |
145 | PAPPEND("CREATE") | |
146 | if (pflags & SSH2_FXF_TRUNC) | |
147 | PAPPEND("TRUNCATE") | |
148 | if (pflags & SSH2_FXF_EXCL) | |
149 | PAPPEND("EXCL") | |
150 | ||
151 | return ret; | |
152 | } | |
153 | ||
396c147e | 154 | static Attrib * |
b5e300c2 | 155 | get_attrib(void) |
156 | { | |
157 | return decode_attrib(&iqueue); | |
158 | } | |
159 | ||
160 | /* handle handles */ | |
161 | ||
162 | typedef struct Handle Handle; | |
163 | struct Handle { | |
164 | int use; | |
165 | DIR *dirp; | |
166 | int fd; | |
167 | char *name; | |
a13880bb | 168 | u_int64_t bytes_read, bytes_write; |
b5e300c2 | 169 | }; |
dce9bac5 | 170 | |
b5e300c2 | 171 | enum { |
172 | HANDLE_UNUSED, | |
173 | HANDLE_DIR, | |
174 | HANDLE_FILE | |
175 | }; | |
dce9bac5 | 176 | |
b5e300c2 | 177 | Handle handles[100]; |
178 | ||
396c147e | 179 | static void |
b5e300c2 | 180 | handle_init(void) |
181 | { | |
2ceb8101 | 182 | u_int i; |
dce9bac5 | 183 | |
184eed6a | 184 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
b5e300c2 | 185 | handles[i].use = HANDLE_UNUSED; |
186 | } | |
187 | ||
396c147e | 188 | static int |
b6c7b7b7 | 189 | handle_new(int use, const char *name, int fd, DIR *dirp) |
b5e300c2 | 190 | { |
2ceb8101 | 191 | u_int i; |
dce9bac5 | 192 | |
184eed6a | 193 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
b5e300c2 | 194 | if (handles[i].use == HANDLE_UNUSED) { |
195 | handles[i].use = use; | |
196 | handles[i].dirp = dirp; | |
197 | handles[i].fd = fd; | |
3e2f2431 | 198 | handles[i].name = xstrdup(name); |
a13880bb | 199 | handles[i].bytes_read = handles[i].bytes_write = 0; |
b5e300c2 | 200 | return i; |
201 | } | |
202 | } | |
203 | return -1; | |
204 | } | |
205 | ||
396c147e | 206 | static int |
b5e300c2 | 207 | handle_is_ok(int i, int type) |
208 | { | |
2ceb8101 | 209 | return i >= 0 && (u_int)i < sizeof(handles)/sizeof(Handle) && |
f546c780 | 210 | handles[i].use == type; |
b5e300c2 | 211 | } |
212 | ||
396c147e | 213 | static int |
b5e300c2 | 214 | handle_to_string(int handle, char **stringp, int *hlenp) |
215 | { | |
b5e300c2 | 216 | if (stringp == NULL || hlenp == NULL) |
217 | return -1; | |
b5c334cc | 218 | *stringp = xmalloc(sizeof(int32_t)); |
51e7a012 | 219 | put_u32(*stringp, handle); |
b5c334cc | 220 | *hlenp = sizeof(int32_t); |
b5e300c2 | 221 | return 0; |
222 | } | |
223 | ||
396c147e | 224 | static int |
b6c7b7b7 | 225 | handle_from_string(const char *handle, u_int hlen) |
b5e300c2 | 226 | { |
b5c334cc | 227 | int val; |
dce9bac5 | 228 | |
b5c334cc | 229 | if (hlen != sizeof(int32_t)) |
b5e300c2 | 230 | return -1; |
51e7a012 | 231 | val = get_u32(handle); |
b5e300c2 | 232 | if (handle_is_ok(val, HANDLE_FILE) || |
233 | handle_is_ok(val, HANDLE_DIR)) | |
234 | return val; | |
235 | return -1; | |
236 | } | |
237 | ||
396c147e | 238 | static char * |
b5e300c2 | 239 | handle_to_name(int handle) |
240 | { | |
241 | if (handle_is_ok(handle, HANDLE_DIR)|| | |
242 | handle_is_ok(handle, HANDLE_FILE)) | |
243 | return handles[handle].name; | |
244 | return NULL; | |
245 | } | |
246 | ||
396c147e | 247 | static DIR * |
b5e300c2 | 248 | handle_to_dir(int handle) |
249 | { | |
250 | if (handle_is_ok(handle, HANDLE_DIR)) | |
251 | return handles[handle].dirp; | |
252 | return NULL; | |
253 | } | |
254 | ||
396c147e | 255 | static int |
b5e300c2 | 256 | handle_to_fd(int handle) |
257 | { | |
2b87da3b | 258 | if (handle_is_ok(handle, HANDLE_FILE)) |
b5e300c2 | 259 | return handles[handle].fd; |
260 | return -1; | |
261 | } | |
262 | ||
a13880bb | 263 | static void |
264 | handle_update_read(int handle, ssize_t bytes) | |
265 | { | |
266 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
267 | handles[handle].bytes_read += bytes; | |
268 | } | |
269 | ||
270 | static void | |
271 | handle_update_write(int handle, ssize_t bytes) | |
272 | { | |
273 | if (handle_is_ok(handle, HANDLE_FILE) && bytes > 0) | |
274 | handles[handle].bytes_write += bytes; | |
275 | } | |
276 | ||
277 | static u_int64_t | |
278 | handle_bytes_read(int handle) | |
279 | { | |
280 | if (handle_is_ok(handle, HANDLE_FILE)) | |
281 | return (handles[handle].bytes_read); | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static u_int64_t | |
286 | handle_bytes_write(int handle) | |
287 | { | |
288 | if (handle_is_ok(handle, HANDLE_FILE)) | |
289 | return (handles[handle].bytes_write); | |
290 | return 0; | |
291 | } | |
292 | ||
396c147e | 293 | static int |
b5e300c2 | 294 | handle_close(int handle) |
295 | { | |
296 | int ret = -1; | |
dce9bac5 | 297 | |
b5e300c2 | 298 | if (handle_is_ok(handle, HANDLE_FILE)) { |
299 | ret = close(handles[handle].fd); | |
300 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 301 | xfree(handles[handle].name); |
b5e300c2 | 302 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
303 | ret = closedir(handles[handle].dirp); | |
304 | handles[handle].use = HANDLE_UNUSED; | |
3e2f2431 | 305 | xfree(handles[handle].name); |
b5e300c2 | 306 | } else { |
307 | errno = ENOENT; | |
308 | } | |
309 | return ret; | |
310 | } | |
311 | ||
a13880bb | 312 | static void |
313 | handle_log_close(int handle, char *emsg) | |
314 | { | |
315 | if (handle_is_ok(handle, HANDLE_FILE)) { | |
316 | logit("%s%sclose \"%s\" bytes read %llu written %llu", | |
317 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
318 | handle_to_name(handle), | |
319 | handle_bytes_read(handle), handle_bytes_write(handle)); | |
320 | } else { | |
321 | logit("%s%sclosedir \"%s\"", | |
322 | emsg == NULL ? "" : emsg, emsg == NULL ? "" : " ", | |
323 | handle_to_name(handle)); | |
324 | } | |
325 | } | |
326 | ||
327 | static void | |
328 | handle_log_exit(void) | |
329 | { | |
330 | u_int i; | |
331 | ||
332 | for (i = 0; i < sizeof(handles)/sizeof(Handle); i++) | |
333 | if (handles[i].use != HANDLE_UNUSED) | |
334 | handle_log_close(i, "forced"); | |
335 | } | |
336 | ||
396c147e | 337 | static int |
b5e300c2 | 338 | get_handle(void) |
339 | { | |
340 | char *handle; | |
f546c780 | 341 | int val = -1; |
bcbf86ec | 342 | u_int hlen; |
dce9bac5 | 343 | |
b5e300c2 | 344 | handle = get_string(&hlen); |
f546c780 | 345 | if (hlen < 256) |
346 | val = handle_from_string(handle, hlen); | |
b5e300c2 | 347 | xfree(handle); |
348 | return val; | |
349 | } | |
350 | ||
351 | /* send replies */ | |
352 | ||
396c147e | 353 | static void |
b5e300c2 | 354 | send_msg(Buffer *m) |
355 | { | |
356 | int mlen = buffer_len(m); | |
dce9bac5 | 357 | |
b5e300c2 | 358 | buffer_put_int(&oqueue, mlen); |
359 | buffer_append(&oqueue, buffer_ptr(m), mlen); | |
360 | buffer_consume(m, mlen); | |
361 | } | |
362 | ||
a13880bb | 363 | static const char * |
364 | status_to_message(u_int32_t status) | |
b5e300c2 | 365 | { |
3a7fe5ba | 366 | const char *status_messages[] = { |
367 | "Success", /* SSH_FX_OK */ | |
368 | "End of file", /* SSH_FX_EOF */ | |
369 | "No such file", /* SSH_FX_NO_SUCH_FILE */ | |
370 | "Permission denied", /* SSH_FX_PERMISSION_DENIED */ | |
371 | "Failure", /* SSH_FX_FAILURE */ | |
372 | "Bad message", /* SSH_FX_BAD_MESSAGE */ | |
373 | "No connection", /* SSH_FX_NO_CONNECTION */ | |
374 | "Connection lost", /* SSH_FX_CONNECTION_LOST */ | |
375 | "Operation unsupported", /* SSH_FX_OP_UNSUPPORTED */ | |
376 | "Unknown error" /* Others */ | |
377 | }; | |
a13880bb | 378 | return (status_messages[MIN(status,SSH2_FX_MAX)]); |
379 | } | |
dce9bac5 | 380 | |
a13880bb | 381 | static void |
382 | send_status(u_int32_t id, u_int32_t status) | |
383 | { | |
384 | Buffer msg; | |
385 | ||
386 | debug3("request %u: sent status %u", id, status); | |
387 | if (log_level > SYSLOG_LEVEL_VERBOSE || | |
388 | (status != SSH2_FX_OK && status != SSH2_FX_EOF)) | |
389 | logit("sent status %s", status_to_message(status)); | |
b5e300c2 | 390 | buffer_init(&msg); |
f546c780 | 391 | buffer_put_char(&msg, SSH2_FXP_STATUS); |
b5e300c2 | 392 | buffer_put_int(&msg, id); |
ca75d7de | 393 | buffer_put_int(&msg, status); |
3a7fe5ba | 394 | if (version >= 3) { |
a13880bb | 395 | buffer_put_cstring(&msg, status_to_message(status)); |
3a7fe5ba | 396 | buffer_put_cstring(&msg, ""); |
397 | } | |
b5e300c2 | 398 | send_msg(&msg); |
399 | buffer_free(&msg); | |
400 | } | |
396c147e | 401 | static void |
b6c7b7b7 | 402 | send_data_or_handle(char type, u_int32_t id, const char *data, int dlen) |
b5e300c2 | 403 | { |
404 | Buffer msg; | |
dce9bac5 | 405 | |
b5e300c2 | 406 | buffer_init(&msg); |
407 | buffer_put_char(&msg, type); | |
408 | buffer_put_int(&msg, id); | |
409 | buffer_put_string(&msg, data, dlen); | |
410 | send_msg(&msg); | |
411 | buffer_free(&msg); | |
412 | } | |
413 | ||
396c147e | 414 | static void |
b6c7b7b7 | 415 | send_data(u_int32_t id, const char *data, int dlen) |
b5e300c2 | 416 | { |
a13880bb | 417 | debug("request %u: sent data len %d", id, dlen); |
f546c780 | 418 | send_data_or_handle(SSH2_FXP_DATA, id, data, dlen); |
b5e300c2 | 419 | } |
420 | ||
396c147e | 421 | static void |
b5e300c2 | 422 | send_handle(u_int32_t id, int handle) |
423 | { | |
424 | char *string; | |
425 | int hlen; | |
dce9bac5 | 426 | |
b5e300c2 | 427 | handle_to_string(handle, &string, &hlen); |
a13880bb | 428 | debug("request %u: sent handle handle %d", id, handle); |
f546c780 | 429 | send_data_or_handle(SSH2_FXP_HANDLE, id, string, hlen); |
b5e300c2 | 430 | xfree(string); |
431 | } | |
432 | ||
396c147e | 433 | static void |
b6c7b7b7 | 434 | send_names(u_int32_t id, int count, const Stat *stats) |
b5e300c2 | 435 | { |
436 | Buffer msg; | |
437 | int i; | |
dce9bac5 | 438 | |
b5e300c2 | 439 | buffer_init(&msg); |
f546c780 | 440 | buffer_put_char(&msg, SSH2_FXP_NAME); |
b5e300c2 | 441 | buffer_put_int(&msg, id); |
442 | buffer_put_int(&msg, count); | |
a13880bb | 443 | debug("request %u: sent names count %d", id, count); |
b5e300c2 | 444 | for (i = 0; i < count; i++) { |
445 | buffer_put_cstring(&msg, stats[i].name); | |
446 | buffer_put_cstring(&msg, stats[i].long_name); | |
447 | encode_attrib(&msg, &stats[i].attrib); | |
448 | } | |
449 | send_msg(&msg); | |
450 | buffer_free(&msg); | |
451 | } | |
452 | ||
396c147e | 453 | static void |
b6c7b7b7 | 454 | send_attrib(u_int32_t id, const Attrib *a) |
b5e300c2 | 455 | { |
456 | Buffer msg; | |
dce9bac5 | 457 | |
a13880bb | 458 | debug("request %u: sent attrib have 0x%x", id, a->flags); |
b5e300c2 | 459 | buffer_init(&msg); |
f546c780 | 460 | buffer_put_char(&msg, SSH2_FXP_ATTRS); |
b5e300c2 | 461 | buffer_put_int(&msg, id); |
462 | encode_attrib(&msg, a); | |
463 | send_msg(&msg); | |
464 | buffer_free(&msg); | |
465 | } | |
466 | ||
467 | /* parse incoming */ | |
468 | ||
396c147e | 469 | static void |
b5e300c2 | 470 | process_init(void) |
471 | { | |
472 | Buffer msg; | |
b5e300c2 | 473 | |
802d93bb | 474 | version = get_int(); |
a13880bb | 475 | verbose("received client version %d", version); |
b5e300c2 | 476 | buffer_init(&msg); |
f546c780 | 477 | buffer_put_char(&msg, SSH2_FXP_VERSION); |
478 | buffer_put_int(&msg, SSH2_FILEXFER_VERSION); | |
b5e300c2 | 479 | send_msg(&msg); |
480 | buffer_free(&msg); | |
481 | } | |
482 | ||
396c147e | 483 | static void |
b5e300c2 | 484 | process_open(void) |
485 | { | |
486 | u_int32_t id, pflags; | |
487 | Attrib *a; | |
488 | char *name; | |
f546c780 | 489 | int handle, fd, flags, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 490 | |
491 | id = get_int(); | |
492 | name = get_string(NULL); | |
f546c780 | 493 | pflags = get_int(); /* portable flags */ |
26ddd377 | 494 | debug3("request %u: open flags %d", id, pflags); |
b5e300c2 | 495 | a = get_attrib(); |
496 | flags = flags_from_portable(pflags); | |
f546c780 | 497 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? a->perm : 0666; |
a13880bb | 498 | logit("open \"%s\" flags %s mode 0%o", |
499 | name, string_from_portable(pflags), mode); | |
b5e300c2 | 500 | fd = open(name, flags, mode); |
501 | if (fd < 0) { | |
502 | status = errno_to_portable(errno); | |
503 | } else { | |
3e2f2431 | 504 | handle = handle_new(HANDLE_FILE, name, fd, NULL); |
b5e300c2 | 505 | if (handle < 0) { |
506 | close(fd); | |
507 | } else { | |
508 | send_handle(id, handle); | |
f546c780 | 509 | status = SSH2_FX_OK; |
b5e300c2 | 510 | } |
511 | } | |
f546c780 | 512 | if (status != SSH2_FX_OK) |
b5e300c2 | 513 | send_status(id, status); |
514 | xfree(name); | |
515 | } | |
516 | ||
396c147e | 517 | static void |
b5e300c2 | 518 | process_close(void) |
519 | { | |
520 | u_int32_t id; | |
f546c780 | 521 | int handle, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 522 | |
523 | id = get_int(); | |
524 | handle = get_handle(); | |
a13880bb | 525 | debug3("request %u: close handle %u", id, handle); |
526 | handle_log_close(handle, NULL); | |
b5e300c2 | 527 | ret = handle_close(handle); |
f546c780 | 528 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 529 | send_status(id, status); |
530 | } | |
531 | ||
396c147e | 532 | static void |
b5e300c2 | 533 | process_read(void) |
534 | { | |
535 | char buf[64*1024]; | |
f546c780 | 536 | u_int32_t id, len; |
537 | int handle, fd, ret, status = SSH2_FX_FAILURE; | |
b5e300c2 | 538 | u_int64_t off; |
539 | ||
540 | id = get_int(); | |
541 | handle = get_handle(); | |
f546c780 | 542 | off = get_int64(); |
b5e300c2 | 543 | len = get_int(); |
544 | ||
a13880bb | 545 | debug("request %u: read \"%s\" (handle %d) off %llu len %d", |
546 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 547 | if (len > sizeof buf) { |
548 | len = sizeof buf; | |
a13880bb | 549 | debug2("read change len %d", len); |
b5e300c2 | 550 | } |
551 | fd = handle_to_fd(handle); | |
552 | if (fd >= 0) { | |
553 | if (lseek(fd, off, SEEK_SET) < 0) { | |
554 | error("process_read: seek failed"); | |
555 | status = errno_to_portable(errno); | |
556 | } else { | |
557 | ret = read(fd, buf, len); | |
558 | if (ret < 0) { | |
559 | status = errno_to_portable(errno); | |
560 | } else if (ret == 0) { | |
f546c780 | 561 | status = SSH2_FX_EOF; |
b5e300c2 | 562 | } else { |
563 | send_data(id, buf, ret); | |
f546c780 | 564 | status = SSH2_FX_OK; |
a13880bb | 565 | handle_update_read(handle, ret); |
b5e300c2 | 566 | } |
567 | } | |
568 | } | |
f546c780 | 569 | if (status != SSH2_FX_OK) |
b5e300c2 | 570 | send_status(id, status); |
571 | } | |
572 | ||
396c147e | 573 | static void |
b5e300c2 | 574 | process_write(void) |
575 | { | |
f546c780 | 576 | u_int32_t id; |
b5e300c2 | 577 | u_int64_t off; |
bcbf86ec | 578 | u_int len; |
f546c780 | 579 | int handle, fd, ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 580 | char *data; |
581 | ||
582 | id = get_int(); | |
583 | handle = get_handle(); | |
f546c780 | 584 | off = get_int64(); |
b5e300c2 | 585 | data = get_string(&len); |
586 | ||
a13880bb | 587 | debug("request %u: write \"%s\" (handle %d) off %llu len %d", |
588 | id, handle_to_name(handle), handle, (unsigned long long)off, len); | |
b5e300c2 | 589 | fd = handle_to_fd(handle); |
590 | if (fd >= 0) { | |
591 | if (lseek(fd, off, SEEK_SET) < 0) { | |
592 | status = errno_to_portable(errno); | |
593 | error("process_write: seek failed"); | |
594 | } else { | |
595 | /* XXX ATOMICIO ? */ | |
596 | ret = write(fd, data, len); | |
2ceb8101 | 597 | if (ret < 0) { |
b5e300c2 | 598 | error("process_write: write failed"); |
599 | status = errno_to_portable(errno); | |
2ceb8101 | 600 | } else if ((size_t)ret == len) { |
f546c780 | 601 | status = SSH2_FX_OK; |
a13880bb | 602 | handle_update_write(handle, ret); |
b5e300c2 | 603 | } else { |
a13880bb | 604 | debug2("nothing at all written"); |
b5e300c2 | 605 | } |
606 | } | |
607 | } | |
608 | send_status(id, status); | |
609 | xfree(data); | |
610 | } | |
611 | ||
396c147e | 612 | static void |
b5e300c2 | 613 | process_do_stat(int do_lstat) |
614 | { | |
b5c334cc | 615 | Attrib a; |
b5e300c2 | 616 | struct stat st; |
617 | u_int32_t id; | |
618 | char *name; | |
f546c780 | 619 | int ret, status = SSH2_FX_FAILURE; |
b5e300c2 | 620 | |
621 | id = get_int(); | |
622 | name = get_string(NULL); | |
a13880bb | 623 | debug3("request %u: %sstat", id, do_lstat ? "l" : ""); |
624 | verbose("%sstat name \"%s\"", do_lstat ? "l" : "", name); | |
b5e300c2 | 625 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
626 | if (ret < 0) { | |
627 | status = errno_to_portable(errno); | |
628 | } else { | |
b5c334cc | 629 | stat_to_attrib(&st, &a); |
630 | send_attrib(id, &a); | |
f546c780 | 631 | status = SSH2_FX_OK; |
b5e300c2 | 632 | } |
f546c780 | 633 | if (status != SSH2_FX_OK) |
b5e300c2 | 634 | send_status(id, status); |
635 | xfree(name); | |
636 | } | |
637 | ||
396c147e | 638 | static void |
b5e300c2 | 639 | process_stat(void) |
640 | { | |
641 | process_do_stat(0); | |
642 | } | |
643 | ||
396c147e | 644 | static void |
b5e300c2 | 645 | process_lstat(void) |
646 | { | |
647 | process_do_stat(1); | |
648 | } | |
649 | ||
396c147e | 650 | static void |
b5e300c2 | 651 | process_fstat(void) |
652 | { | |
b5c334cc | 653 | Attrib a; |
b5e300c2 | 654 | struct stat st; |
655 | u_int32_t id; | |
f546c780 | 656 | int fd, ret, handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 657 | |
658 | id = get_int(); | |
659 | handle = get_handle(); | |
a13880bb | 660 | debug("request %u: fstat \"%s\" (handle %u)", |
661 | id, handle_to_name(handle), handle); | |
b5e300c2 | 662 | fd = handle_to_fd(handle); |
663 | if (fd >= 0) { | |
664 | ret = fstat(fd, &st); | |
665 | if (ret < 0) { | |
666 | status = errno_to_portable(errno); | |
667 | } else { | |
b5c334cc | 668 | stat_to_attrib(&st, &a); |
669 | send_attrib(id, &a); | |
f546c780 | 670 | status = SSH2_FX_OK; |
b5e300c2 | 671 | } |
672 | } | |
f546c780 | 673 | if (status != SSH2_FX_OK) |
b5e300c2 | 674 | send_status(id, status); |
675 | } | |
676 | ||
396c147e | 677 | static struct timeval * |
b6c7b7b7 | 678 | attrib_to_tv(const Attrib *a) |
b5e300c2 | 679 | { |
680 | static struct timeval tv[2]; | |
dce9bac5 | 681 | |
b5e300c2 | 682 | tv[0].tv_sec = a->atime; |
683 | tv[0].tv_usec = 0; | |
684 | tv[1].tv_sec = a->mtime; | |
685 | tv[1].tv_usec = 0; | |
686 | return tv; | |
687 | } | |
688 | ||
396c147e | 689 | static void |
b5e300c2 | 690 | process_setstat(void) |
691 | { | |
692 | Attrib *a; | |
693 | u_int32_t id; | |
694 | char *name; | |
9906a836 | 695 | int status = SSH2_FX_OK, ret; |
b5e300c2 | 696 | |
697 | id = get_int(); | |
698 | name = get_string(NULL); | |
699 | a = get_attrib(); | |
a13880bb | 700 | debug("request %u: setstat name \"%s\"", id, name); |
cb476289 | 701 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 702 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 703 | ret = truncate(name, a->size); |
704 | if (ret == -1) | |
705 | status = errno_to_portable(errno); | |
706 | } | |
f546c780 | 707 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 708 | logit("set \"%s\" mode %04o", name, a->perm); |
b5e300c2 | 709 | ret = chmod(name, a->perm & 0777); |
710 | if (ret == -1) | |
711 | status = errno_to_portable(errno); | |
712 | } | |
f546c780 | 713 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 714 | char buf[64]; |
715 | time_t t = a->mtime; | |
716 | ||
717 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
718 | localtime(&t)); | |
719 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 720 | ret = utimes(name, attrib_to_tv(a)); |
721 | if (ret == -1) | |
722 | status = errno_to_portable(errno); | |
723 | } | |
408ba72f | 724 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 725 | logit("set \"%s\" owner %lu group %lu", name, |
726 | (u_long)a->uid, (u_long)a->gid); | |
408ba72f | 727 | ret = chown(name, a->uid, a->gid); |
728 | if (ret == -1) | |
729 | status = errno_to_portable(errno); | |
730 | } | |
b5e300c2 | 731 | send_status(id, status); |
732 | xfree(name); | |
733 | } | |
734 | ||
396c147e | 735 | static void |
b5e300c2 | 736 | process_fsetstat(void) |
737 | { | |
738 | Attrib *a; | |
739 | u_int32_t id; | |
740 | int handle, fd, ret; | |
f546c780 | 741 | int status = SSH2_FX_OK; |
16e538d4 | 742 | |
b5e300c2 | 743 | id = get_int(); |
744 | handle = get_handle(); | |
745 | a = get_attrib(); | |
a13880bb | 746 | debug("request %u: fsetstat handle %d", id, handle); |
b5e300c2 | 747 | fd = handle_to_fd(handle); |
a13880bb | 748 | if (fd < 0) { |
f546c780 | 749 | status = SSH2_FX_FAILURE; |
b5e300c2 | 750 | } else { |
a13880bb | 751 | char *name = handle_to_name(handle); |
752 | ||
cb476289 | 753 | if (a->flags & SSH2_FILEXFER_ATTR_SIZE) { |
a13880bb | 754 | logit("set \"%s\" size %llu", name, a->size); |
cb476289 | 755 | ret = ftruncate(fd, a->size); |
756 | if (ret == -1) | |
757 | status = errno_to_portable(errno); | |
758 | } | |
f546c780 | 759 | if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) { |
a13880bb | 760 | logit("set \"%s\" mode %04o", name, a->perm); |
2fd3c144 | 761 | #ifdef HAVE_FCHMOD |
b5e300c2 | 762 | ret = fchmod(fd, a->perm & 0777); |
2fd3c144 | 763 | #else |
c33f0b36 | 764 | ret = chmod(name, a->perm & 0777); |
2fd3c144 | 765 | #endif |
b5e300c2 | 766 | if (ret == -1) |
767 | status = errno_to_portable(errno); | |
768 | } | |
f546c780 | 769 | if (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME) { |
a13880bb | 770 | char buf[64]; |
771 | time_t t = a->mtime; | |
772 | ||
773 | strftime(buf, sizeof(buf), "%Y%m%d-%H:%M:%S", | |
774 | localtime(&t)); | |
775 | logit("set \"%s\" modtime %s", name, buf); | |
b5e300c2 | 776 | #ifdef HAVE_FUTIMES |
777 | ret = futimes(fd, attrib_to_tv(a)); | |
778 | #else | |
779 | ret = utimes(name, attrib_to_tv(a)); | |
780 | #endif | |
781 | if (ret == -1) | |
782 | status = errno_to_portable(errno); | |
783 | } | |
408ba72f | 784 | if (a->flags & SSH2_FILEXFER_ATTR_UIDGID) { |
a13880bb | 785 | logit("set \"%s\" owner %lu group %lu", name, |
786 | (u_long)a->uid, (u_long)a->gid); | |
01f13020 | 787 | #ifdef HAVE_FCHOWN |
408ba72f | 788 | ret = fchown(fd, a->uid, a->gid); |
01f13020 | 789 | #else |
790 | ret = chown(name, a->uid, a->gid); | |
791 | #endif | |
408ba72f | 792 | if (ret == -1) |
793 | status = errno_to_portable(errno); | |
794 | } | |
b5e300c2 | 795 | } |
796 | send_status(id, status); | |
797 | } | |
798 | ||
396c147e | 799 | static void |
b5e300c2 | 800 | process_opendir(void) |
801 | { | |
802 | DIR *dirp = NULL; | |
803 | char *path; | |
f546c780 | 804 | int handle, status = SSH2_FX_FAILURE; |
b5e300c2 | 805 | u_int32_t id; |
806 | ||
807 | id = get_int(); | |
808 | path = get_string(NULL); | |
a13880bb | 809 | debug3("request %u: opendir", id); |
810 | logit("opendir \"%s\"", path); | |
2b87da3b | 811 | dirp = opendir(path); |
b5e300c2 | 812 | if (dirp == NULL) { |
813 | status = errno_to_portable(errno); | |
814 | } else { | |
3e2f2431 | 815 | handle = handle_new(HANDLE_DIR, path, 0, dirp); |
b5e300c2 | 816 | if (handle < 0) { |
817 | closedir(dirp); | |
818 | } else { | |
819 | send_handle(id, handle); | |
f546c780 | 820 | status = SSH2_FX_OK; |
b5e300c2 | 821 | } |
2b87da3b | 822 | |
b5e300c2 | 823 | } |
f546c780 | 824 | if (status != SSH2_FX_OK) |
b5e300c2 | 825 | send_status(id, status); |
826 | xfree(path); | |
827 | } | |
828 | ||
396c147e | 829 | static void |
b5e300c2 | 830 | process_readdir(void) |
831 | { | |
832 | DIR *dirp; | |
833 | struct dirent *dp; | |
834 | char *path; | |
835 | int handle; | |
836 | u_int32_t id; | |
837 | ||
838 | id = get_int(); | |
839 | handle = get_handle(); | |
a13880bb | 840 | debug("request %u: readdir \"%s\" (handle %d)", id, |
841 | handle_to_name(handle), handle); | |
b5e300c2 | 842 | dirp = handle_to_dir(handle); |
843 | path = handle_to_name(handle); | |
844 | if (dirp == NULL || path == NULL) { | |
f546c780 | 845 | send_status(id, SSH2_FX_FAILURE); |
b5e300c2 | 846 | } else { |
b5e300c2 | 847 | struct stat st; |
a13880bb | 848 | char pathname[MAXPATHLEN]; |
b5e300c2 | 849 | Stat *stats; |
850 | int nstats = 10, count = 0, i; | |
9906a836 | 851 | |
52e3daed | 852 | stats = xcalloc(nstats, sizeof(Stat)); |
b5e300c2 | 853 | while ((dp = readdir(dirp)) != NULL) { |
854 | if (count >= nstats) { | |
855 | nstats *= 2; | |
c5d10563 | 856 | stats = xrealloc(stats, nstats, sizeof(Stat)); |
b5e300c2 | 857 | } |
858 | /* XXX OVERFLOW ? */ | |
88690211 | 859 | snprintf(pathname, sizeof pathname, "%s%s%s", path, |
860 | strcmp(path, "/") ? "/" : "", dp->d_name); | |
b5e300c2 | 861 | if (lstat(pathname, &st) < 0) |
862 | continue; | |
b5c334cc | 863 | stat_to_attrib(&st, &(stats[count].attrib)); |
b5e300c2 | 864 | stats[count].name = xstrdup(dp->d_name); |
00b3ad3e | 865 | stats[count].long_name = ls_file(dp->d_name, &st, 0); |
b5e300c2 | 866 | count++; |
867 | /* send up to 100 entries in one message */ | |
b5c334cc | 868 | /* XXX check packet size instead */ |
b5e300c2 | 869 | if (count == 100) |
870 | break; | |
871 | } | |
f546c780 | 872 | if (count > 0) { |
873 | send_names(id, count, stats); | |
184eed6a | 874 | for (i = 0; i < count; i++) { |
f546c780 | 875 | xfree(stats[i].name); |
876 | xfree(stats[i].long_name); | |
877 | } | |
878 | } else { | |
879 | send_status(id, SSH2_FX_EOF); | |
b5e300c2 | 880 | } |
881 | xfree(stats); | |
882 | } | |
883 | } | |
884 | ||
396c147e | 885 | static void |
b5e300c2 | 886 | process_remove(void) |
887 | { | |
888 | char *name; | |
889 | u_int32_t id; | |
f546c780 | 890 | int status = SSH2_FX_FAILURE; |
b5e300c2 | 891 | int ret; |
892 | ||
893 | id = get_int(); | |
894 | name = get_string(NULL); | |
a13880bb | 895 | debug3("request %u: remove", id); |
896 | logit("remove name \"%s\"", name); | |
67b0facb | 897 | ret = unlink(name); |
f546c780 | 898 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 899 | send_status(id, status); |
900 | xfree(name); | |
901 | } | |
902 | ||
396c147e | 903 | static void |
b5e300c2 | 904 | process_mkdir(void) |
905 | { | |
906 | Attrib *a; | |
907 | u_int32_t id; | |
908 | char *name; | |
f546c780 | 909 | int ret, mode, status = SSH2_FX_FAILURE; |
b5e300c2 | 910 | |
911 | id = get_int(); | |
912 | name = get_string(NULL); | |
913 | a = get_attrib(); | |
f546c780 | 914 | mode = (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) ? |
915 | a->perm & 0777 : 0777; | |
a13880bb | 916 | debug3("request %u: mkdir", id); |
917 | logit("mkdir name \"%s\" mode 0%o", name, mode); | |
b5e300c2 | 918 | ret = mkdir(name, mode); |
f546c780 | 919 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 920 | send_status(id, status); |
921 | xfree(name); | |
922 | } | |
923 | ||
396c147e | 924 | static void |
b5e300c2 | 925 | process_rmdir(void) |
926 | { | |
927 | u_int32_t id; | |
928 | char *name; | |
929 | int ret, status; | |
930 | ||
931 | id = get_int(); | |
932 | name = get_string(NULL); | |
a13880bb | 933 | debug3("request %u: rmdir", id); |
934 | logit("rmdir name \"%s\"", name); | |
b5e300c2 | 935 | ret = rmdir(name); |
f546c780 | 936 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; |
b5e300c2 | 937 | send_status(id, status); |
938 | xfree(name); | |
939 | } | |
940 | ||
396c147e | 941 | static void |
b5e300c2 | 942 | process_realpath(void) |
943 | { | |
944 | char resolvedname[MAXPATHLEN]; | |
945 | u_int32_t id; | |
946 | char *path; | |
947 | ||
948 | id = get_int(); | |
949 | path = get_string(NULL); | |
6b523bae | 950 | if (path[0] == '\0') { |
951 | xfree(path); | |
952 | path = xstrdup("."); | |
953 | } | |
a13880bb | 954 | debug3("request %u: realpath", id); |
955 | verbose("realpath \"%s\"", path); | |
b5e300c2 | 956 | if (realpath(path, resolvedname) == NULL) { |
957 | send_status(id, errno_to_portable(errno)); | |
958 | } else { | |
959 | Stat s; | |
960 | attrib_clear(&s.attrib); | |
961 | s.name = s.long_name = resolvedname; | |
962 | send_names(id, 1, &s); | |
963 | } | |
964 | xfree(path); | |
965 | } | |
966 | ||
396c147e | 967 | static void |
b5e300c2 | 968 | process_rename(void) |
969 | { | |
970 | u_int32_t id; | |
971 | char *oldpath, *newpath; | |
f2f28f1f | 972 | int status; |
fd77a40f | 973 | struct stat sb; |
b5e300c2 | 974 | |
975 | id = get_int(); | |
976 | oldpath = get_string(NULL); | |
977 | newpath = get_string(NULL); | |
a13880bb | 978 | debug3("request %u: rename", id); |
979 | logit("rename old \"%s\" new \"%s\"", oldpath, newpath); | |
fd77a40f | 980 | status = SSH2_FX_FAILURE; |
981 | if (lstat(oldpath, &sb) == -1) | |
f2f28f1f | 982 | status = errno_to_portable(errno); |
fd77a40f | 983 | else if (S_ISREG(sb.st_mode)) { |
984 | /* Race-free rename of regular files */ | |
dc5888bf | 985 | if (link(oldpath, newpath) == -1) { |
cd698186 | 986 | if (errno == EOPNOTSUPP |
987 | #ifdef LINK_OPNOTSUPP_ERRNO | |
988 | || errno == LINK_OPNOTSUPP_ERRNO | |
989 | #endif | |
990 | ) { | |
dc5888bf | 991 | struct stat st; |
992 | ||
993 | /* | |
994 | * fs doesn't support links, so fall back to | |
995 | * stat+rename. This is racy. | |
996 | */ | |
997 | if (stat(newpath, &st) == -1) { | |
998 | if (rename(oldpath, newpath) == -1) | |
999 | status = | |
1000 | errno_to_portable(errno); | |
1001 | else | |
1002 | status = SSH2_FX_OK; | |
1003 | } | |
1004 | } else { | |
1005 | status = errno_to_portable(errno); | |
1006 | } | |
1007 | } else if (unlink(oldpath) == -1) { | |
fd77a40f | 1008 | status = errno_to_portable(errno); |
1009 | /* clean spare link */ | |
1010 | unlink(newpath); | |
1011 | } else | |
1012 | status = SSH2_FX_OK; | |
1013 | } else if (stat(newpath, &sb) == -1) { | |
1014 | if (rename(oldpath, newpath) == -1) | |
1015 | status = errno_to_portable(errno); | |
1016 | else | |
1017 | status = SSH2_FX_OK; | |
1018 | } | |
b5e300c2 | 1019 | send_status(id, status); |
1020 | xfree(oldpath); | |
1021 | xfree(newpath); | |
1022 | } | |
1023 | ||
396c147e | 1024 | static void |
3a7fe5ba | 1025 | process_readlink(void) |
1026 | { | |
1027 | u_int32_t id; | |
362df52e | 1028 | int len; |
ca75d7de | 1029 | char buf[MAXPATHLEN]; |
3a7fe5ba | 1030 | char *path; |
1031 | ||
1032 | id = get_int(); | |
1033 | path = get_string(NULL); | |
a13880bb | 1034 | debug3("request %u: readlink", id); |
1035 | verbose("readlink \"%s\"", path); | |
ca75d7de | 1036 | if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1) |
3a7fe5ba | 1037 | send_status(id, errno_to_portable(errno)); |
1038 | else { | |
1039 | Stat s; | |
184eed6a | 1040 | |
ca75d7de | 1041 | buf[len] = '\0'; |
3a7fe5ba | 1042 | attrib_clear(&s.attrib); |
ca75d7de | 1043 | s.name = s.long_name = buf; |
3a7fe5ba | 1044 | send_names(id, 1, &s); |
1045 | } | |
1046 | xfree(path); | |
1047 | } | |
1048 | ||
396c147e | 1049 | static void |
3a7fe5ba | 1050 | process_symlink(void) |
1051 | { | |
1052 | u_int32_t id; | |
3a7fe5ba | 1053 | char *oldpath, *newpath; |
f2f28f1f | 1054 | int ret, status; |
3a7fe5ba | 1055 | |
1056 | id = get_int(); | |
1057 | oldpath = get_string(NULL); | |
1058 | newpath = get_string(NULL); | |
a13880bb | 1059 | debug3("request %u: symlink", id); |
1060 | logit("symlink old \"%s\" new \"%s\"", oldpath, newpath); | |
f2f28f1f | 1061 | /* this will fail if 'newpath' exists */ |
1062 | ret = symlink(oldpath, newpath); | |
1063 | status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK; | |
3a7fe5ba | 1064 | send_status(id, status); |
1065 | xfree(oldpath); | |
1066 | xfree(newpath); | |
1067 | } | |
1068 | ||
396c147e | 1069 | static void |
f546c780 | 1070 | process_extended(void) |
1071 | { | |
1072 | u_int32_t id; | |
1073 | char *request; | |
1074 | ||
1075 | id = get_int(); | |
1076 | request = get_string(NULL); | |
1077 | send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */ | |
1078 | xfree(request); | |
1079 | } | |
b5e300c2 | 1080 | |
1081 | /* stolen from ssh-agent */ | |
1082 | ||
396c147e | 1083 | static void |
b5e300c2 | 1084 | process(void) |
1085 | { | |
1e3b8b07 | 1086 | u_int msg_len; |
9b4ac641 | 1087 | u_int buf_len; |
1088 | u_int consumed; | |
1e3b8b07 | 1089 | u_int type; |
1090 | u_char *cp; | |
b5e300c2 | 1091 | |
9b4ac641 | 1092 | buf_len = buffer_len(&iqueue); |
1093 | if (buf_len < 5) | |
b5e300c2 | 1094 | return; /* Incomplete message. */ |
20905a8e | 1095 | cp = buffer_ptr(&iqueue); |
51e7a012 | 1096 | msg_len = get_u32(cp); |
3eee3b86 | 1097 | if (msg_len > SFTP_MAX_MSG_LENGTH) { |
a13880bb | 1098 | error("bad message from %s local user %s", |
1099 | client_addr, pw->pw_name); | |
1100 | cleanup_exit(11); | |
b5e300c2 | 1101 | } |
9b4ac641 | 1102 | if (buf_len < msg_len + 4) |
b5e300c2 | 1103 | return; |
1104 | buffer_consume(&iqueue, 4); | |
9b4ac641 | 1105 | buf_len -= 4; |
b5e300c2 | 1106 | type = buffer_get_char(&iqueue); |
1107 | switch (type) { | |
f546c780 | 1108 | case SSH2_FXP_INIT: |
b5e300c2 | 1109 | process_init(); |
1110 | break; | |
f546c780 | 1111 | case SSH2_FXP_OPEN: |
b5e300c2 | 1112 | process_open(); |
1113 | break; | |
f546c780 | 1114 | case SSH2_FXP_CLOSE: |
b5e300c2 | 1115 | process_close(); |
1116 | break; | |
f546c780 | 1117 | case SSH2_FXP_READ: |
b5e300c2 | 1118 | process_read(); |
1119 | break; | |
f546c780 | 1120 | case SSH2_FXP_WRITE: |
b5e300c2 | 1121 | process_write(); |
1122 | break; | |
f546c780 | 1123 | case SSH2_FXP_LSTAT: |
b5e300c2 | 1124 | process_lstat(); |
1125 | break; | |
f546c780 | 1126 | case SSH2_FXP_FSTAT: |
b5e300c2 | 1127 | process_fstat(); |
1128 | break; | |
f546c780 | 1129 | case SSH2_FXP_SETSTAT: |
b5e300c2 | 1130 | process_setstat(); |
1131 | break; | |
f546c780 | 1132 | case SSH2_FXP_FSETSTAT: |
b5e300c2 | 1133 | process_fsetstat(); |
1134 | break; | |
f546c780 | 1135 | case SSH2_FXP_OPENDIR: |
b5e300c2 | 1136 | process_opendir(); |
1137 | break; | |
f546c780 | 1138 | case SSH2_FXP_READDIR: |
b5e300c2 | 1139 | process_readdir(); |
1140 | break; | |
f546c780 | 1141 | case SSH2_FXP_REMOVE: |
b5e300c2 | 1142 | process_remove(); |
1143 | break; | |
f546c780 | 1144 | case SSH2_FXP_MKDIR: |
b5e300c2 | 1145 | process_mkdir(); |
1146 | break; | |
f546c780 | 1147 | case SSH2_FXP_RMDIR: |
b5e300c2 | 1148 | process_rmdir(); |
1149 | break; | |
f546c780 | 1150 | case SSH2_FXP_REALPATH: |
b5e300c2 | 1151 | process_realpath(); |
1152 | break; | |
f546c780 | 1153 | case SSH2_FXP_STAT: |
b5e300c2 | 1154 | process_stat(); |
1155 | break; | |
f546c780 | 1156 | case SSH2_FXP_RENAME: |
b5e300c2 | 1157 | process_rename(); |
1158 | break; | |
3a7fe5ba | 1159 | case SSH2_FXP_READLINK: |
1160 | process_readlink(); | |
1161 | break; | |
1162 | case SSH2_FXP_SYMLINK: | |
1163 | process_symlink(); | |
1164 | break; | |
f546c780 | 1165 | case SSH2_FXP_EXTENDED: |
1166 | process_extended(); | |
1167 | break; | |
b5e300c2 | 1168 | default: |
1169 | error("Unknown message %d", type); | |
1170 | break; | |
1171 | } | |
9b4ac641 | 1172 | /* discard the remaining bytes from the current packet */ |
1173 | if (buf_len < buffer_len(&iqueue)) | |
a13880bb | 1174 | fatal("iqueue grew unexpectedly"); |
9b4ac641 | 1175 | consumed = buf_len - buffer_len(&iqueue); |
1176 | if (msg_len < consumed) | |
1177 | fatal("msg_len %d < consumed %d", msg_len, consumed); | |
1178 | if (msg_len > consumed) | |
1179 | buffer_consume(&iqueue, msg_len - consumed); | |
b5e300c2 | 1180 | } |
1181 | ||
a13880bb | 1182 | /* Cleanup handler that logs active handles upon normal exit */ |
1183 | void | |
1184 | cleanup_exit(int i) | |
1185 | { | |
1186 | if (pw != NULL && client_addr != NULL) { | |
1187 | handle_log_exit(); | |
1188 | logit("session closed for local user %s from [%s]", | |
1189 | pw->pw_name, client_addr); | |
1190 | } | |
1191 | _exit(i); | |
1192 | } | |
1193 | ||
1194 | static void | |
1195 | usage(void) | |
1196 | { | |
1197 | extern char *__progname; | |
1198 | ||
1199 | fprintf(stderr, | |
1200 | "usage: %s [-he] [-l log_level] [-f log_facility]\n", __progname); | |
1201 | exit(1); | |
1202 | } | |
1203 | ||
b5e300c2 | 1204 | int |
a13880bb | 1205 | main(int argc, char **argv) |
b5e300c2 | 1206 | { |
c8d75031 | 1207 | fd_set *rset, *wset; |
a13880bb | 1208 | int in, out, max, ch, skipargs = 0, log_stderr = 0; |
c8d75031 | 1209 | ssize_t len, olen, set_size; |
a13880bb | 1210 | SyslogFacility log_facility = SYSLOG_FACILITY_AUTH; |
1211 | char *cp; | |
1212 | ||
a13880bb | 1213 | extern char *optarg; |
1214 | extern char *__progname; | |
b5e300c2 | 1215 | |
fd6168c1 | 1216 | /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ |
1217 | sanitise_stdfd(); | |
1218 | ||
a13880bb | 1219 | __progname = ssh_get_progname(argv[0]); |
1220 | log_init(__progname, log_level, log_facility, log_stderr); | |
1221 | ||
1222 | while (!skipargs && (ch = getopt(argc, argv, "C:f:l:che")) != -1) { | |
1223 | switch (ch) { | |
1224 | case 'c': | |
1225 | /* | |
1226 | * Ignore all arguments if we are invoked as a | |
1227 | * shell using "sftp-server -c command" | |
1228 | */ | |
1229 | skipargs = 1; | |
1230 | break; | |
1231 | case 'e': | |
1232 | log_stderr = 1; | |
1233 | break; | |
1234 | case 'l': | |
1235 | log_level = log_level_number(optarg); | |
1236 | if (log_level == SYSLOG_LEVEL_NOT_SET) | |
1237 | error("Invalid log level \"%s\"", optarg); | |
1238 | break; | |
1239 | case 'f': | |
1240 | log_facility = log_facility_number(optarg); | |
1241 | if (log_level == SYSLOG_FACILITY_NOT_SET) | |
1242 | error("Invalid log facility \"%s\"", optarg); | |
1243 | break; | |
1244 | case 'h': | |
1245 | default: | |
1246 | usage(); | |
1247 | } | |
1248 | } | |
61b3a2bc | 1249 | |
a13880bb | 1250 | log_init(__progname, log_level, log_facility, log_stderr); |
b5e300c2 | 1251 | |
a13880bb | 1252 | if ((cp = getenv("SSH_CONNECTION")) != NULL) { |
1253 | client_addr = xstrdup(cp); | |
1254 | if ((cp = strchr(client_addr, ' ')) == NULL) | |
1255 | fatal("Malformed SSH_CONNECTION variable: \"%s\"", | |
1256 | getenv("SSH_CONNECTION")); | |
1257 | *cp = '\0'; | |
1258 | } else | |
1259 | client_addr = xstrdup("UNKNOWN"); | |
1260 | ||
1261 | if ((pw = getpwuid(getuid())) == NULL) | |
1262 | fatal("No user found for uid %lu", (u_long)getuid()); | |
1263 | pw = pwcopy(pw); | |
1264 | ||
1265 | logit("session opened for local user %s from [%s]", | |
1266 | pw->pw_name, client_addr); | |
1267 | ||
1268 | handle_init(); | |
f546c780 | 1269 | |
b5e300c2 | 1270 | in = dup(STDIN_FILENO); |
1271 | out = dup(STDOUT_FILENO); | |
1272 | ||
fe56c12b | 1273 | #ifdef HAVE_CYGWIN |
1274 | setmode(in, O_BINARY); | |
1275 | setmode(out, O_BINARY); | |
1276 | #endif | |
1277 | ||
b5e300c2 | 1278 | max = 0; |
1279 | if (in > max) | |
1280 | max = in; | |
1281 | if (out > max) | |
1282 | max = out; | |
1283 | ||
1284 | buffer_init(&iqueue); | |
1285 | buffer_init(&oqueue); | |
1286 | ||
c8d75031 | 1287 | set_size = howmany(max + 1, NFDBITS) * sizeof(fd_mask); |
1288 | rset = (fd_set *)xmalloc(set_size); | |
1289 | wset = (fd_set *)xmalloc(set_size); | |
1290 | ||
b5e300c2 | 1291 | for (;;) { |
c8d75031 | 1292 | memset(rset, 0, set_size); |
1293 | memset(wset, 0, set_size); | |
b5e300c2 | 1294 | |
c8d75031 | 1295 | FD_SET(in, rset); |
b5e300c2 | 1296 | olen = buffer_len(&oqueue); |
1297 | if (olen > 0) | |
c8d75031 | 1298 | FD_SET(out, wset); |
b5e300c2 | 1299 | |
c8d75031 | 1300 | if (select(max+1, rset, wset, NULL, NULL) < 0) { |
b5e300c2 | 1301 | if (errno == EINTR) |
1302 | continue; | |
a13880bb | 1303 | error("select: %s", strerror(errno)); |
1304 | cleanup_exit(2); | |
b5e300c2 | 1305 | } |
1306 | ||
1307 | /* copy stdin to iqueue */ | |
c8d75031 | 1308 | if (FD_ISSET(in, rset)) { |
b5e300c2 | 1309 | char buf[4*4096]; |
1310 | len = read(in, buf, sizeof buf); | |
1311 | if (len == 0) { | |
1312 | debug("read eof"); | |
a13880bb | 1313 | cleanup_exit(0); |
b5e300c2 | 1314 | } else if (len < 0) { |
a13880bb | 1315 | error("read: %s", strerror(errno)); |
1316 | cleanup_exit(1); | |
b5e300c2 | 1317 | } else { |
1318 | buffer_append(&iqueue, buf, len); | |
1319 | } | |
1320 | } | |
1321 | /* send oqueue to stdout */ | |
c8d75031 | 1322 | if (FD_ISSET(out, wset)) { |
b5e300c2 | 1323 | len = write(out, buffer_ptr(&oqueue), olen); |
1324 | if (len < 0) { | |
a13880bb | 1325 | error("write: %s", strerror(errno)); |
1326 | cleanup_exit(1); | |
b5e300c2 | 1327 | } else { |
1328 | buffer_consume(&oqueue, len); | |
1329 | } | |
1330 | } | |
1331 | /* process requests from client */ | |
1332 | process(); | |
1333 | } | |
1334 | } |