Damien Miller | 7b28dc5 | 2000-09-05 13:34:53 +1100 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * 1. Redistributions of source code must retain the above copyright |
| 8 | * notice, this list of conditions and the following disclaimer. |
| 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer in the |
| 11 | * documentation and/or other materials provided with the distribution. |
| 12 | * 3. All advertising materials mentioning features or use of this software |
| 13 | * must display the following acknowledgement: |
| 14 | * This product includes software developed by Markus Friedl. |
| 15 | * 4. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | #include "includes.h" |
| 30 | RCSID("$OpenBSD: sftp-server.c,v 1.4 2000/09/04 19:10:08 markus Exp $"); |
| 31 | |
| 32 | #include "ssh.h" |
| 33 | #include "buffer.h" |
| 34 | #include "bufaux.h" |
| 35 | #include "getput.h" |
| 36 | #include "xmalloc.h" |
| 37 | |
| 38 | /* version */ |
| 39 | #define SSH_FILEXFER_VERSION 2 |
| 40 | |
| 41 | /* client to server */ |
| 42 | #define SSH_FXP_INIT 1 |
| 43 | #define SSH_FXP_OPEN 3 |
| 44 | #define SSH_FXP_CLOSE 4 |
| 45 | #define SSH_FXP_READ 5 |
| 46 | #define SSH_FXP_WRITE 6 |
| 47 | #define SSH_FXP_LSTAT 7 |
| 48 | #define SSH_FXP_FSTAT 8 |
| 49 | #define SSH_FXP_SETSTAT 9 |
| 50 | #define SSH_FXP_FSETSTAT 10 |
| 51 | #define SSH_FXP_OPENDIR 11 |
| 52 | #define SSH_FXP_READDIR 12 |
| 53 | #define SSH_FXP_REMOVE 13 |
| 54 | #define SSH_FXP_MKDIR 14 |
| 55 | #define SSH_FXP_RMDIR 15 |
| 56 | #define SSH_FXP_REALPATH 16 |
| 57 | #define SSH_FXP_STAT 17 |
| 58 | #define SSH_FXP_RENAME 18 |
| 59 | |
| 60 | /* server to client */ |
| 61 | #define SSH_FXP_VERSION 2 |
| 62 | #define SSH_FXP_STATUS 101 |
| 63 | #define SSH_FXP_HANDLE 102 |
| 64 | #define SSH_FXP_DATA 103 |
| 65 | #define SSH_FXP_NAME 104 |
| 66 | #define SSH_FXP_ATTRS 105 |
| 67 | |
| 68 | /* portable open modes */ |
| 69 | #define SSH_FXF_READ 0x01 |
| 70 | #define SSH_FXF_WRITE 0x02 |
| 71 | #define SSH_FXF_APPEND 0x04 |
| 72 | #define SSH_FXF_CREAT 0x08 |
| 73 | #define SSH_FXF_TRUNC 0x10 |
| 74 | #define SSH_FXF_EXCL 0x20 |
| 75 | |
| 76 | /* attributes */ |
| 77 | #define SSH_FXA_HAVE_SIZE 0x01 |
| 78 | #define SSH_FXA_HAVE_UGID 0x02 |
| 79 | #define SSH_FXA_HAVE_PERM 0x04 |
| 80 | #define SSH_FXA_HAVE_TIME 0x08 |
| 81 | |
| 82 | /* status messages */ |
| 83 | #define SSH_FX_OK 0x00 |
| 84 | #define SSH_FX_EOF 0x01 |
| 85 | #define SSH_FX_NO_SUCH_FILE 0x02 |
| 86 | #define SSH_FX_PERMISSION_DENIED 0x03 |
| 87 | #define SSH_FX_FAILURE 0x04 |
| 88 | #define SSH_FX_BAD_MESSAGE 0x05 |
| 89 | #define SSH_FX_NO_CONNECTION 0x06 |
| 90 | #define SSH_FX_CONNECTION_LOST 0x07 |
| 91 | |
| 92 | |
| 93 | /* helper */ |
| 94 | #define get_int() buffer_get_int(&iqueue); |
| 95 | #define get_string(lenp) buffer_get_string(&iqueue, lenp); |
| 96 | #define TRACE log |
| 97 | |
| 98 | /* input and output queue */ |
| 99 | Buffer iqueue; |
| 100 | Buffer oqueue; |
| 101 | |
| 102 | /* portable attibutes, etc. */ |
| 103 | |
| 104 | typedef struct Attrib Attrib; |
| 105 | typedef struct Stat Stat; |
| 106 | |
| 107 | struct Attrib |
| 108 | { |
| 109 | u_int32_t flags; |
| 110 | u_int32_t size_high; |
| 111 | u_int32_t size_low; |
| 112 | u_int64_t size; |
| 113 | u_int32_t uid; |
| 114 | u_int32_t gid; |
| 115 | u_int32_t perm; |
| 116 | u_int32_t atime; |
| 117 | u_int32_t mtime; |
| 118 | }; |
| 119 | |
| 120 | struct Stat |
| 121 | { |
| 122 | char *name; |
| 123 | char *long_name; |
| 124 | Attrib attrib; |
| 125 | }; |
| 126 | |
| 127 | int |
| 128 | errno_to_portable(int unixerrno) |
| 129 | { |
| 130 | int ret = 0; |
| 131 | switch (unixerrno) { |
| 132 | case 0: |
| 133 | ret = SSH_FX_OK; |
| 134 | break; |
| 135 | case ENOENT: |
| 136 | case ENOTDIR: |
| 137 | case EBADF: |
| 138 | case ELOOP: |
| 139 | ret = SSH_FX_NO_SUCH_FILE; |
| 140 | break; |
| 141 | case EPERM: |
| 142 | case EACCES: |
| 143 | case EFAULT: |
| 144 | ret = SSH_FX_PERMISSION_DENIED; |
| 145 | break; |
| 146 | case ENAMETOOLONG: |
| 147 | case EINVAL: |
| 148 | ret = SSH_FX_BAD_MESSAGE; |
| 149 | break; |
| 150 | default: |
| 151 | ret = SSH_FX_FAILURE; |
| 152 | break; |
| 153 | } |
| 154 | return ret; |
| 155 | } |
| 156 | |
| 157 | int |
| 158 | flags_from_portable(int pflags) |
| 159 | { |
| 160 | int flags = 0; |
| 161 | if (pflags & SSH_FXF_READ && |
| 162 | pflags & SSH_FXF_WRITE) { |
| 163 | flags = O_RDWR; |
| 164 | } else if (pflags & SSH_FXF_READ) { |
| 165 | flags = O_RDONLY; |
| 166 | } else if (pflags & SSH_FXF_WRITE) { |
| 167 | flags = O_WRONLY; |
| 168 | } |
| 169 | if (pflags & SSH_FXF_CREAT) |
| 170 | flags |= O_CREAT; |
| 171 | if (pflags & SSH_FXF_TRUNC) |
| 172 | flags |= O_TRUNC; |
| 173 | if (pflags & SSH_FXF_EXCL) |
| 174 | flags |= O_EXCL; |
| 175 | return flags; |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | attrib_clear(Attrib *a) |
| 180 | { |
| 181 | a->flags = 0; |
| 182 | a->size_low = 0; |
| 183 | a->size_high = 0; |
| 184 | a->size = 0; |
| 185 | a->uid = 0; |
| 186 | a->gid = 0; |
| 187 | a->perm = 0; |
| 188 | a->atime = 0; |
| 189 | a->mtime = 0; |
| 190 | } |
| 191 | |
| 192 | Attrib * |
| 193 | decode_attrib(Buffer *b) |
| 194 | { |
| 195 | static Attrib a; |
| 196 | attrib_clear(&a); |
| 197 | a.flags = get_int(); |
| 198 | if (a.flags & SSH_FXA_HAVE_SIZE) { |
| 199 | a.size_high = get_int(); |
| 200 | a.size_low = get_int(); |
| 201 | a.size = (((u_int64_t) a.size_high) << 32) + a.size_low; |
| 202 | } |
| 203 | if (a.flags & SSH_FXA_HAVE_UGID) { |
| 204 | a.uid = get_int(); |
| 205 | a.gid = get_int(); |
| 206 | } |
| 207 | if (a.flags & SSH_FXA_HAVE_PERM) { |
| 208 | a.perm = get_int(); |
| 209 | } |
| 210 | if (a.flags & SSH_FXA_HAVE_TIME) { |
| 211 | a.atime = get_int(); |
| 212 | a.mtime = get_int(); |
| 213 | } |
| 214 | return &a; |
| 215 | } |
| 216 | |
| 217 | void |
| 218 | encode_attrib(Buffer *b, Attrib *a) |
| 219 | { |
| 220 | buffer_put_int(b, a->flags); |
| 221 | if (a->flags & SSH_FXA_HAVE_SIZE) { |
| 222 | buffer_put_int(b, a->size_high); |
| 223 | buffer_put_int(b, a->size_low); |
| 224 | } |
| 225 | if (a->flags & SSH_FXA_HAVE_UGID) { |
| 226 | buffer_put_int(b, a->uid); |
| 227 | buffer_put_int(b, a->gid); |
| 228 | } |
| 229 | if (a->flags & SSH_FXA_HAVE_PERM) { |
| 230 | buffer_put_int(b, a->perm); |
| 231 | } |
| 232 | if (a->flags & SSH_FXA_HAVE_TIME) { |
| 233 | buffer_put_int(b, a->atime); |
| 234 | buffer_put_int(b, a->mtime); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | Attrib * |
| 239 | stat_to_attrib(struct stat *st) |
| 240 | { |
| 241 | static Attrib a; |
| 242 | attrib_clear(&a); |
| 243 | a.flags = 0; |
| 244 | a.flags |= SSH_FXA_HAVE_SIZE; |
| 245 | a.size = st->st_size; |
| 246 | a.size_low = a.size; |
| 247 | a.size_high = (u_int32_t) (a.size >> 32); |
| 248 | a.flags |= SSH_FXA_HAVE_UGID; |
| 249 | a.uid = st->st_uid; |
| 250 | a.gid = st->st_gid; |
| 251 | a.flags |= SSH_FXA_HAVE_PERM; |
| 252 | a.perm = st->st_mode; |
| 253 | a.flags |= SSH_FXA_HAVE_TIME; |
| 254 | a.atime = st->st_atime; |
| 255 | a.mtime = st->st_mtime; |
| 256 | return &a; |
| 257 | } |
| 258 | |
| 259 | Attrib * |
| 260 | get_attrib(void) |
| 261 | { |
| 262 | return decode_attrib(&iqueue); |
| 263 | } |
| 264 | |
| 265 | /* handle handles */ |
| 266 | |
| 267 | typedef struct Handle Handle; |
| 268 | struct Handle { |
| 269 | int use; |
| 270 | DIR *dirp; |
| 271 | int fd; |
| 272 | char *name; |
| 273 | }; |
| 274 | enum { |
| 275 | HANDLE_UNUSED, |
| 276 | HANDLE_DIR, |
| 277 | HANDLE_FILE |
| 278 | }; |
| 279 | Handle handles[100]; |
| 280 | |
| 281 | void |
| 282 | handle_init(void) |
| 283 | { |
| 284 | int i; |
| 285 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) |
| 286 | handles[i].use = HANDLE_UNUSED; |
| 287 | } |
| 288 | |
| 289 | int |
| 290 | handle_new(int use, char *name, int fd, DIR *dirp) |
| 291 | { |
| 292 | int i; |
| 293 | for(i = 0; i < sizeof(handles)/sizeof(Handle); i++) { |
| 294 | if (handles[i].use == HANDLE_UNUSED) { |
| 295 | handles[i].use = use; |
| 296 | handles[i].dirp = dirp; |
| 297 | handles[i].fd = fd; |
| 298 | handles[i].name = name; |
| 299 | return i; |
| 300 | } |
| 301 | } |
| 302 | return -1; |
| 303 | } |
| 304 | |
| 305 | int |
| 306 | handle_is_ok(int i, int type) |
| 307 | { |
| 308 | return i >= 0 && i < sizeof(handles)/sizeof(Handle) && handles[i].use == type; |
| 309 | } |
| 310 | |
| 311 | int |
| 312 | handle_to_string(int handle, char **stringp, int *hlenp) |
| 313 | { |
| 314 | char buf[1024]; |
| 315 | if (stringp == NULL || hlenp == NULL) |
| 316 | return -1; |
| 317 | snprintf(buf, sizeof buf, "%d", handle); |
| 318 | *stringp = xstrdup(buf); |
| 319 | *hlenp = strlen(*stringp); |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | int |
| 324 | handle_from_string(char *handle, int hlen) |
| 325 | { |
| 326 | /* XXX OVERFLOW ? */ |
| 327 | char *ep; |
| 328 | long lval = strtol(handle, &ep, 10); |
| 329 | int val = lval; |
| 330 | if (*ep != '\0') |
| 331 | return -1; |
| 332 | if (handle_is_ok(val, HANDLE_FILE) || |
| 333 | handle_is_ok(val, HANDLE_DIR)) |
| 334 | return val; |
| 335 | return -1; |
| 336 | } |
| 337 | |
| 338 | char * |
| 339 | handle_to_name(int handle) |
| 340 | { |
| 341 | if (handle_is_ok(handle, HANDLE_DIR)|| |
| 342 | handle_is_ok(handle, HANDLE_FILE)) |
| 343 | return handles[handle].name; |
| 344 | return NULL; |
| 345 | } |
| 346 | |
| 347 | DIR * |
| 348 | handle_to_dir(int handle) |
| 349 | { |
| 350 | if (handle_is_ok(handle, HANDLE_DIR)) |
| 351 | return handles[handle].dirp; |
| 352 | return NULL; |
| 353 | } |
| 354 | |
| 355 | int |
| 356 | handle_to_fd(int handle) |
| 357 | { |
| 358 | if (handle_is_ok(handle, HANDLE_FILE)) |
| 359 | return handles[handle].fd; |
| 360 | return -1; |
| 361 | } |
| 362 | |
| 363 | int |
| 364 | handle_close(int handle) |
| 365 | { |
| 366 | int ret = -1; |
| 367 | if (handle_is_ok(handle, HANDLE_FILE)) { |
| 368 | ret = close(handles[handle].fd); |
| 369 | handles[handle].use = HANDLE_UNUSED; |
| 370 | } else if (handle_is_ok(handle, HANDLE_DIR)) { |
| 371 | ret = closedir(handles[handle].dirp); |
| 372 | handles[handle].use = HANDLE_UNUSED; |
| 373 | } else { |
| 374 | errno = ENOENT; |
| 375 | } |
| 376 | return ret; |
| 377 | } |
| 378 | |
| 379 | int |
| 380 | get_handle(void) |
| 381 | { |
| 382 | char *handle; |
| 383 | int hlen, val; |
| 384 | handle = get_string(&hlen); |
| 385 | val = handle_from_string(handle, hlen); |
| 386 | xfree(handle); |
| 387 | return val; |
| 388 | } |
| 389 | |
| 390 | /* send replies */ |
| 391 | |
| 392 | void |
| 393 | send_msg(Buffer *m) |
| 394 | { |
| 395 | int mlen = buffer_len(m); |
| 396 | buffer_put_int(&oqueue, mlen); |
| 397 | buffer_append(&oqueue, buffer_ptr(m), mlen); |
| 398 | buffer_consume(m, mlen); |
| 399 | } |
| 400 | |
| 401 | void |
| 402 | send_status(u_int32_t id, u_int32_t error) |
| 403 | { |
| 404 | Buffer msg; |
| 405 | TRACE("sent status id %d error %d", id, error); |
| 406 | buffer_init(&msg); |
| 407 | buffer_put_char(&msg, SSH_FXP_STATUS); |
| 408 | buffer_put_int(&msg, id); |
| 409 | buffer_put_int(&msg, error); |
| 410 | send_msg(&msg); |
| 411 | buffer_free(&msg); |
| 412 | } |
| 413 | void |
| 414 | send_data_or_handle(char type, u_int32_t id, char *data, int dlen) |
| 415 | { |
| 416 | Buffer msg; |
| 417 | buffer_init(&msg); |
| 418 | buffer_put_char(&msg, type); |
| 419 | buffer_put_int(&msg, id); |
| 420 | buffer_put_string(&msg, data, dlen); |
| 421 | send_msg(&msg); |
| 422 | buffer_free(&msg); |
| 423 | } |
| 424 | |
| 425 | void |
| 426 | send_data(u_int32_t id, char *data, int dlen) |
| 427 | { |
| 428 | TRACE("sent data id %d len %d", id, dlen); |
| 429 | send_data_or_handle(SSH_FXP_DATA, id, data, dlen); |
| 430 | } |
| 431 | |
| 432 | void |
| 433 | send_handle(u_int32_t id, int handle) |
| 434 | { |
| 435 | char *string; |
| 436 | int hlen; |
| 437 | handle_to_string(handle, &string, &hlen); |
| 438 | TRACE("sent handle id %d handle %d", id, handle); |
| 439 | send_data_or_handle(SSH_FXP_HANDLE, id, string, hlen); |
| 440 | xfree(string); |
| 441 | } |
| 442 | |
| 443 | void |
| 444 | send_names(u_int32_t id, int count, Stat *stats) |
| 445 | { |
| 446 | Buffer msg; |
| 447 | int i; |
| 448 | buffer_init(&msg); |
| 449 | buffer_put_char(&msg, SSH_FXP_NAME); |
| 450 | buffer_put_int(&msg, id); |
| 451 | buffer_put_int(&msg, count); |
| 452 | TRACE("sent names id %d count %d", id, count); |
| 453 | for (i = 0; i < count; i++) { |
| 454 | buffer_put_cstring(&msg, stats[i].name); |
| 455 | buffer_put_cstring(&msg, stats[i].long_name); |
| 456 | encode_attrib(&msg, &stats[i].attrib); |
| 457 | } |
| 458 | send_msg(&msg); |
| 459 | buffer_free(&msg); |
| 460 | } |
| 461 | |
| 462 | void |
| 463 | send_attrib(u_int32_t id, Attrib *a) |
| 464 | { |
| 465 | Buffer msg; |
| 466 | TRACE("sent attrib id %d have 0x%x", id, a->flags); |
| 467 | buffer_init(&msg); |
| 468 | buffer_put_char(&msg, SSH_FXP_ATTRS); |
| 469 | buffer_put_int(&msg, id); |
| 470 | encode_attrib(&msg, a); |
| 471 | send_msg(&msg); |
| 472 | buffer_free(&msg); |
| 473 | } |
| 474 | |
| 475 | /* parse incoming */ |
| 476 | |
| 477 | void |
| 478 | process_init(void) |
| 479 | { |
| 480 | Buffer msg; |
| 481 | int version = buffer_get_int(&iqueue); |
| 482 | |
| 483 | TRACE("client version %d", version); |
| 484 | buffer_init(&msg); |
| 485 | buffer_put_char(&msg, SSH_FXP_VERSION); |
| 486 | buffer_put_int(&msg, SSH_FILEXFER_VERSION); |
| 487 | send_msg(&msg); |
| 488 | buffer_free(&msg); |
| 489 | } |
| 490 | |
| 491 | void |
| 492 | process_open(void) |
| 493 | { |
| 494 | u_int32_t id, pflags; |
| 495 | Attrib *a; |
| 496 | char *name; |
| 497 | int handle, fd, flags, mode, status = SSH_FX_FAILURE; |
| 498 | |
| 499 | id = get_int(); |
| 500 | name = get_string(NULL); |
| 501 | pflags = get_int(); |
| 502 | a = get_attrib(); |
| 503 | flags = flags_from_portable(pflags); |
| 504 | mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm : 0666; |
| 505 | TRACE("open id %d name %s flags %d mode 0%o", id, name, pflags, mode); |
| 506 | fd = open(name, flags, mode); |
| 507 | if (fd < 0) { |
| 508 | status = errno_to_portable(errno); |
| 509 | } else { |
| 510 | handle = handle_new(HANDLE_FILE, xstrdup(name), fd, NULL); |
| 511 | if (handle < 0) { |
| 512 | close(fd); |
| 513 | } else { |
| 514 | send_handle(id, handle); |
| 515 | status = SSH_FX_OK; |
| 516 | } |
| 517 | } |
| 518 | if (status != SSH_FX_OK) |
| 519 | send_status(id, status); |
| 520 | xfree(name); |
| 521 | } |
| 522 | |
| 523 | void |
| 524 | process_close(void) |
| 525 | { |
| 526 | u_int32_t id; |
| 527 | int handle, ret, status = SSH_FX_FAILURE; |
| 528 | |
| 529 | id = get_int(); |
| 530 | handle = get_handle(); |
| 531 | TRACE("close id %d handle %d", id, handle); |
| 532 | ret = handle_close(handle); |
| 533 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; |
| 534 | send_status(id, status); |
| 535 | } |
| 536 | |
| 537 | void |
| 538 | process_read(void) |
| 539 | { |
| 540 | char buf[64*1024]; |
| 541 | u_int32_t id, off_high, off_low, len; |
| 542 | int handle, fd, ret, status = SSH_FX_FAILURE; |
| 543 | u_int64_t off; |
| 544 | |
| 545 | id = get_int(); |
| 546 | handle = get_handle(); |
| 547 | off_high = get_int(); |
| 548 | off_low = get_int(); |
| 549 | len = get_int(); |
| 550 | |
| 551 | off = (((u_int64_t) off_high) << 32) + off_low; |
| 552 | TRACE("read id %d handle %d off %qd len %d", id, handle, off, len); |
| 553 | if (len > sizeof buf) { |
| 554 | len = sizeof buf; |
| 555 | log("read change len %d", len); |
| 556 | } |
| 557 | fd = handle_to_fd(handle); |
| 558 | if (fd >= 0) { |
| 559 | if (lseek(fd, off, SEEK_SET) < 0) { |
| 560 | error("process_read: seek failed"); |
| 561 | status = errno_to_portable(errno); |
| 562 | } else { |
| 563 | ret = read(fd, buf, len); |
| 564 | if (ret < 0) { |
| 565 | status = errno_to_portable(errno); |
| 566 | } else if (ret == 0) { |
| 567 | status = SSH_FX_EOF; |
| 568 | } else { |
| 569 | send_data(id, buf, ret); |
| 570 | status = SSH_FX_OK; |
| 571 | } |
| 572 | } |
| 573 | } |
| 574 | if (status != SSH_FX_OK) |
| 575 | send_status(id, status); |
| 576 | } |
| 577 | |
| 578 | void |
| 579 | process_write(void) |
| 580 | { |
| 581 | u_int32_t id, off_high, off_low; |
| 582 | u_int64_t off; |
| 583 | int len; |
| 584 | int handle, fd, ret, status = SSH_FX_FAILURE; |
| 585 | char *data; |
| 586 | |
| 587 | id = get_int(); |
| 588 | handle = get_handle(); |
| 589 | off_high = get_int(); |
| 590 | off_low = get_int(); |
| 591 | data = get_string(&len); |
| 592 | |
| 593 | off = (((u_int64_t) off_high) << 32) + off_low; |
| 594 | TRACE("write id %d handle %d off %qd len %d", id, handle, off, len); |
| 595 | fd = handle_to_fd(handle); |
| 596 | if (fd >= 0) { |
| 597 | if (lseek(fd, off, SEEK_SET) < 0) { |
| 598 | status = errno_to_portable(errno); |
| 599 | error("process_write: seek failed"); |
| 600 | } else { |
| 601 | /* XXX ATOMICIO ? */ |
| 602 | ret = write(fd, data, len); |
| 603 | if (ret == -1) { |
| 604 | error("process_write: write failed"); |
| 605 | status = errno_to_portable(errno); |
| 606 | } else if (ret == len) { |
| 607 | status = SSH_FX_OK; |
| 608 | } else { |
| 609 | log("nothing at all written"); |
| 610 | } |
| 611 | } |
| 612 | } |
| 613 | send_status(id, status); |
| 614 | xfree(data); |
| 615 | } |
| 616 | |
| 617 | void |
| 618 | process_do_stat(int do_lstat) |
| 619 | { |
| 620 | Attrib *a; |
| 621 | struct stat st; |
| 622 | u_int32_t id; |
| 623 | char *name; |
| 624 | int ret, status = SSH_FX_FAILURE; |
| 625 | |
| 626 | id = get_int(); |
| 627 | name = get_string(NULL); |
| 628 | TRACE("%sstat id %d name %s", do_lstat ? "l" : "", id, name); |
| 629 | ret = do_lstat ? lstat(name, &st) : stat(name, &st); |
| 630 | if (ret < 0) { |
| 631 | status = errno_to_portable(errno); |
| 632 | } else { |
| 633 | a = stat_to_attrib(&st); |
| 634 | send_attrib(id, a); |
| 635 | status = SSH_FX_OK; |
| 636 | } |
| 637 | if (status != SSH_FX_OK) |
| 638 | send_status(id, status); |
| 639 | xfree(name); |
| 640 | } |
| 641 | |
| 642 | void |
| 643 | process_stat(void) |
| 644 | { |
| 645 | process_do_stat(0); |
| 646 | } |
| 647 | |
| 648 | void |
| 649 | process_lstat(void) |
| 650 | { |
| 651 | process_do_stat(1); |
| 652 | } |
| 653 | |
| 654 | void |
| 655 | process_fstat(void) |
| 656 | { |
| 657 | Attrib *a; |
| 658 | struct stat st; |
| 659 | u_int32_t id; |
| 660 | int fd, ret, handle, status = SSH_FX_FAILURE; |
| 661 | |
| 662 | id = get_int(); |
| 663 | handle = get_handle(); |
| 664 | TRACE("fstat id %d handle %d", id, handle); |
| 665 | fd = handle_to_fd(handle); |
| 666 | if (fd >= 0) { |
| 667 | ret = fstat(fd, &st); |
| 668 | if (ret < 0) { |
| 669 | status = errno_to_portable(errno); |
| 670 | } else { |
| 671 | a = stat_to_attrib(&st); |
| 672 | send_attrib(id, a); |
| 673 | status = SSH_FX_OK; |
| 674 | } |
| 675 | } |
| 676 | if (status != SSH_FX_OK) |
| 677 | send_status(id, status); |
| 678 | } |
| 679 | |
| 680 | struct timeval * |
| 681 | attrib_to_tv(Attrib *a) |
| 682 | { |
| 683 | static struct timeval tv[2]; |
| 684 | tv[0].tv_sec = a->atime; |
| 685 | tv[0].tv_usec = 0; |
| 686 | tv[1].tv_sec = a->mtime; |
| 687 | tv[1].tv_usec = 0; |
| 688 | return tv; |
| 689 | } |
| 690 | |
| 691 | void |
| 692 | process_setstat(void) |
| 693 | { |
| 694 | Attrib *a; |
| 695 | u_int32_t id; |
| 696 | char *name; |
| 697 | int ret; |
| 698 | int status = SSH_FX_OK; |
| 699 | |
| 700 | id = get_int(); |
| 701 | name = get_string(NULL); |
| 702 | a = get_attrib(); |
| 703 | TRACE("setstat id %d name %s", id, name); |
| 704 | if (a->flags & SSH_FXA_HAVE_PERM) { |
| 705 | ret = chmod(name, a->perm & 0777); |
| 706 | if (ret == -1) |
| 707 | status = errno_to_portable(errno); |
| 708 | } |
| 709 | if (a->flags & SSH_FXA_HAVE_TIME) { |
| 710 | ret = utimes(name, attrib_to_tv(a)); |
| 711 | if (ret == -1) |
| 712 | status = errno_to_portable(errno); |
| 713 | } |
| 714 | send_status(id, status); |
| 715 | xfree(name); |
| 716 | } |
| 717 | |
| 718 | void |
| 719 | process_fsetstat(void) |
| 720 | { |
| 721 | Attrib *a; |
| 722 | u_int32_t id; |
| 723 | int handle, fd, ret; |
| 724 | int status = SSH_FX_OK; |
| 725 | char *name = NULL; |
| 726 | |
| 727 | id = get_int(); |
| 728 | handle = get_handle(); |
| 729 | a = get_attrib(); |
| 730 | TRACE("fsetstat id %d handle %d", id, handle); |
| 731 | fd = handle_to_fd(handle); |
| 732 | name = handle_to_name(handle); |
| 733 | if ((fd < 0) || (name == NULL)) { |
| 734 | status = SSH_FX_FAILURE; |
| 735 | } else { |
| 736 | if (a->flags & SSH_FXA_HAVE_PERM) { |
| 737 | ret = fchmod(fd, a->perm & 0777); |
| 738 | if (ret == -1) |
| 739 | status = errno_to_portable(errno); |
| 740 | } |
| 741 | if (a->flags & SSH_FXA_HAVE_TIME) { |
| 742 | #ifdef HAVE_FUTIMES |
| 743 | ret = futimes(fd, attrib_to_tv(a)); |
| 744 | #else |
| 745 | ret = utimes(name, attrib_to_tv(a)); |
| 746 | #endif |
| 747 | if (ret == -1) |
| 748 | status = errno_to_portable(errno); |
| 749 | } |
| 750 | } |
| 751 | send_status(id, status); |
| 752 | } |
| 753 | |
| 754 | void |
| 755 | process_opendir(void) |
| 756 | { |
| 757 | DIR *dirp = NULL; |
| 758 | char *path; |
| 759 | int handle, status = SSH_FX_FAILURE; |
| 760 | u_int32_t id; |
| 761 | |
| 762 | id = get_int(); |
| 763 | path = get_string(NULL); |
| 764 | TRACE("opendir id %d path %s", id, path); |
| 765 | dirp = opendir(path); |
| 766 | if (dirp == NULL) { |
| 767 | status = errno_to_portable(errno); |
| 768 | } else { |
| 769 | handle = handle_new(HANDLE_DIR, xstrdup(path), 0, dirp); |
| 770 | if (handle < 0) { |
| 771 | closedir(dirp); |
| 772 | } else { |
| 773 | send_handle(id, handle); |
| 774 | status = SSH_FX_OK; |
| 775 | } |
| 776 | |
| 777 | } |
| 778 | if (status != SSH_FX_OK) |
| 779 | send_status(id, status); |
| 780 | xfree(path); |
| 781 | } |
| 782 | |
| 783 | char * |
| 784 | ls_file(char *name, struct stat *st) |
| 785 | { |
| 786 | char buf[1024]; |
| 787 | snprintf(buf, sizeof buf, "0%o %d %d %qd %d %s", |
| 788 | st->st_mode, st->st_uid, st->st_gid, (long long)st->st_size,(int) st->st_mtime, |
| 789 | name); |
| 790 | return xstrdup(buf); |
| 791 | } |
| 792 | |
| 793 | void |
| 794 | process_readdir(void) |
| 795 | { |
| 796 | DIR *dirp; |
| 797 | struct dirent *dp; |
| 798 | char *path; |
| 799 | int handle; |
| 800 | u_int32_t id; |
| 801 | |
| 802 | id = get_int(); |
| 803 | handle = get_handle(); |
| 804 | TRACE("readdir id %d handle %d", id, handle); |
| 805 | dirp = handle_to_dir(handle); |
| 806 | path = handle_to_name(handle); |
| 807 | if (dirp == NULL || path == NULL) { |
| 808 | send_status(id, SSH_FX_FAILURE); |
| 809 | } else { |
| 810 | Attrib *a; |
| 811 | struct stat st; |
| 812 | char pathname[1024]; |
| 813 | Stat *stats; |
| 814 | int nstats = 10, count = 0, i; |
| 815 | stats = xmalloc(nstats * sizeof(Stat)); |
| 816 | while ((dp = readdir(dirp)) != NULL) { |
| 817 | if (count >= nstats) { |
| 818 | nstats *= 2; |
| 819 | stats = xrealloc(stats, nstats * sizeof(Stat)); |
| 820 | } |
| 821 | /* XXX OVERFLOW ? */ |
| 822 | snprintf(pathname, sizeof pathname, |
| 823 | "%s/%s", path, dp->d_name); |
| 824 | if (lstat(pathname, &st) < 0) |
| 825 | continue; |
| 826 | a = stat_to_attrib(&st); |
| 827 | stats[count].attrib = *a; |
| 828 | stats[count].name = xstrdup(dp->d_name); |
| 829 | stats[count].long_name = ls_file(dp->d_name, &st); |
| 830 | count++; |
| 831 | /* send up to 100 entries in one message */ |
| 832 | if (count == 100) |
| 833 | break; |
| 834 | } |
| 835 | send_names(id, count, stats); |
| 836 | for(i = 0; i < count; i++) { |
| 837 | xfree(stats[i].name); |
| 838 | xfree(stats[i].long_name); |
| 839 | } |
| 840 | xfree(stats); |
| 841 | } |
| 842 | } |
| 843 | |
| 844 | void |
| 845 | process_remove(void) |
| 846 | { |
| 847 | char *name; |
| 848 | u_int32_t id; |
| 849 | int status = SSH_FX_FAILURE; |
| 850 | int ret; |
| 851 | |
| 852 | id = get_int(); |
| 853 | name = get_string(NULL); |
| 854 | TRACE("remove id %d name %s", id, name); |
| 855 | ret = remove(name); |
| 856 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; |
| 857 | send_status(id, status); |
| 858 | xfree(name); |
| 859 | } |
| 860 | |
| 861 | void |
| 862 | process_mkdir(void) |
| 863 | { |
| 864 | Attrib *a; |
| 865 | u_int32_t id; |
| 866 | char *name; |
| 867 | int ret, mode, status = SSH_FX_FAILURE; |
| 868 | |
| 869 | id = get_int(); |
| 870 | name = get_string(NULL); |
| 871 | a = get_attrib(); |
| 872 | mode = (a->flags & SSH_FXA_HAVE_PERM) ? a->perm & 0777 : 0777; |
| 873 | TRACE("mkdir id %d name %s mode 0%o", id, name, mode); |
| 874 | ret = mkdir(name, mode); |
| 875 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; |
| 876 | send_status(id, status); |
| 877 | xfree(name); |
| 878 | } |
| 879 | |
| 880 | void |
| 881 | process_rmdir(void) |
| 882 | { |
| 883 | u_int32_t id; |
| 884 | char *name; |
| 885 | int ret, status; |
| 886 | |
| 887 | id = get_int(); |
| 888 | name = get_string(NULL); |
| 889 | TRACE("rmdir id %d name %s", id, name); |
| 890 | ret = rmdir(name); |
| 891 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; |
| 892 | send_status(id, status); |
| 893 | xfree(name); |
| 894 | } |
| 895 | |
| 896 | void |
| 897 | process_realpath(void) |
| 898 | { |
| 899 | char resolvedname[MAXPATHLEN]; |
| 900 | u_int32_t id; |
| 901 | char *path; |
| 902 | |
| 903 | id = get_int(); |
| 904 | path = get_string(NULL); |
| 905 | TRACE("realpath id %d path %s", id, path); |
| 906 | if (realpath(path, resolvedname) == NULL) { |
| 907 | send_status(id, errno_to_portable(errno)); |
| 908 | } else { |
| 909 | Stat s; |
| 910 | attrib_clear(&s.attrib); |
| 911 | s.name = s.long_name = resolvedname; |
| 912 | send_names(id, 1, &s); |
| 913 | } |
| 914 | xfree(path); |
| 915 | } |
| 916 | |
| 917 | void |
| 918 | process_rename(void) |
| 919 | { |
| 920 | u_int32_t id; |
| 921 | char *oldpath, *newpath; |
| 922 | int ret, status; |
| 923 | |
| 924 | id = get_int(); |
| 925 | oldpath = get_string(NULL); |
| 926 | newpath = get_string(NULL); |
| 927 | TRACE("rename id %d old %s new %s", id, oldpath, newpath); |
| 928 | ret = rename(oldpath, newpath); |
| 929 | status = (ret == -1) ? errno_to_portable(errno) : SSH_FX_OK; |
| 930 | send_status(id, status); |
| 931 | xfree(oldpath); |
| 932 | xfree(newpath); |
| 933 | } |
| 934 | |
| 935 | |
| 936 | /* stolen from ssh-agent */ |
| 937 | |
| 938 | void |
| 939 | process(void) |
| 940 | { |
| 941 | unsigned int msg_len; |
| 942 | unsigned int type; |
| 943 | unsigned char *cp; |
| 944 | |
| 945 | if (buffer_len(&iqueue) < 5) |
| 946 | return; /* Incomplete message. */ |
| 947 | cp = (unsigned char *) buffer_ptr(&iqueue); |
| 948 | msg_len = GET_32BIT(cp); |
| 949 | if (msg_len > 256 * 1024) { |
| 950 | error("bad message "); |
| 951 | exit(11); |
| 952 | } |
| 953 | if (buffer_len(&iqueue) < msg_len + 4) |
| 954 | return; |
| 955 | buffer_consume(&iqueue, 4); |
| 956 | type = buffer_get_char(&iqueue); |
| 957 | switch (type) { |
| 958 | case SSH_FXP_INIT: |
| 959 | process_init(); |
| 960 | break; |
| 961 | case SSH_FXP_OPEN: |
| 962 | process_open(); |
| 963 | break; |
| 964 | case SSH_FXP_CLOSE: |
| 965 | process_close(); |
| 966 | break; |
| 967 | case SSH_FXP_READ: |
| 968 | process_read(); |
| 969 | break; |
| 970 | case SSH_FXP_WRITE: |
| 971 | process_write(); |
| 972 | break; |
| 973 | case SSH_FXP_LSTAT: |
| 974 | process_lstat(); |
| 975 | break; |
| 976 | case SSH_FXP_FSTAT: |
| 977 | process_fstat(); |
| 978 | break; |
| 979 | case SSH_FXP_SETSTAT: |
| 980 | process_setstat(); |
| 981 | break; |
| 982 | case SSH_FXP_FSETSTAT: |
| 983 | process_fsetstat(); |
| 984 | break; |
| 985 | case SSH_FXP_OPENDIR: |
| 986 | process_opendir(); |
| 987 | break; |
| 988 | case SSH_FXP_READDIR: |
| 989 | process_readdir(); |
| 990 | break; |
| 991 | case SSH_FXP_REMOVE: |
| 992 | process_remove(); |
| 993 | break; |
| 994 | case SSH_FXP_MKDIR: |
| 995 | process_mkdir(); |
| 996 | break; |
| 997 | case SSH_FXP_RMDIR: |
| 998 | process_rmdir(); |
| 999 | break; |
| 1000 | case SSH_FXP_REALPATH: |
| 1001 | process_realpath(); |
| 1002 | break; |
| 1003 | case SSH_FXP_STAT: |
| 1004 | process_stat(); |
| 1005 | break; |
| 1006 | case SSH_FXP_RENAME: |
| 1007 | process_rename(); |
| 1008 | break; |
| 1009 | default: |
| 1010 | error("Unknown message %d", type); |
| 1011 | break; |
| 1012 | } |
| 1013 | } |
| 1014 | |
| 1015 | int |
| 1016 | main(int ac, char **av) |
| 1017 | { |
| 1018 | fd_set rset, wset; |
| 1019 | int in, out, max; |
| 1020 | size_t len, olen; |
| 1021 | |
| 1022 | handle_init(); |
| 1023 | |
| 1024 | in = dup(STDIN_FILENO); |
| 1025 | out = dup(STDOUT_FILENO); |
| 1026 | |
| 1027 | max = 0; |
| 1028 | if (in > max) |
| 1029 | max = in; |
| 1030 | if (out > max) |
| 1031 | max = out; |
| 1032 | |
| 1033 | buffer_init(&iqueue); |
| 1034 | buffer_init(&oqueue); |
| 1035 | |
| 1036 | for (;;) { |
| 1037 | FD_ZERO(&rset); |
| 1038 | FD_ZERO(&wset); |
| 1039 | |
| 1040 | FD_SET(in, &rset); |
| 1041 | olen = buffer_len(&oqueue); |
| 1042 | if (olen > 0) |
| 1043 | FD_SET(out, &wset); |
| 1044 | |
| 1045 | if (select(max+1, &rset, &wset, NULL, NULL) < 0) { |
| 1046 | if (errno == EINTR) |
| 1047 | continue; |
| 1048 | exit(2); |
| 1049 | } |
| 1050 | |
| 1051 | /* copy stdin to iqueue */ |
| 1052 | if (FD_ISSET(in, &rset)) { |
| 1053 | char buf[4*4096]; |
| 1054 | len = read(in, buf, sizeof buf); |
| 1055 | if (len == 0) { |
| 1056 | debug("read eof"); |
| 1057 | exit(0); |
| 1058 | } else if (len < 0) { |
| 1059 | error("read error"); |
| 1060 | exit(1); |
| 1061 | } else { |
| 1062 | buffer_append(&iqueue, buf, len); |
| 1063 | } |
| 1064 | } |
| 1065 | /* send oqueue to stdout */ |
| 1066 | if (FD_ISSET(out, &wset)) { |
| 1067 | len = write(out, buffer_ptr(&oqueue), olen); |
| 1068 | if (len < 0) { |
| 1069 | error("write error"); |
| 1070 | exit(1); |
| 1071 | } else { |
| 1072 | buffer_consume(&oqueue, len); |
| 1073 | } |
| 1074 | } |
| 1075 | /* process requests from client */ |
| 1076 | process(); |
| 1077 | } |
| 1078 | } |