1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /* 33 * Trivial file transfer protocol server. 34 * 35 * This version includes many modifications by Jim Guyton 36 * <guyton@rand-unix>. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/ioctl.h> 41 #include <sys/socket.h> 42 #include <sys/stat.h> 43 #include <sys/time.h> 44 45 #include <netinet/in.h> 46 #include <arpa/tftp.h> 47 48 #include <ctype.h> 49 #include <errno.h> 50 #include <fcntl.h> 51 #include <netdb.h> 52 #include <pwd.h> 53 #include <stdint.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <syslog.h> 58 #include <time.h> 59 #include <unistd.h> 60 61 #include "tftp-file.h" 62 #include "tftp-io.h" 63 #include "tftp-utils.h" 64 #include "tftp-transfer.h" 65 #include "tftp-options.h" 66 67 #ifdef LIBWRAP 68 #include <tcpd.h> 69 #endif 70 71 static void tftp_wrq(int peer, char *, size_t); 72 static void tftp_rrq(int peer, char *, size_t); 73 74 /* 75 * Null-terminated directory prefix list for absolute pathname requests and 76 * search list for relative pathname requests. 77 * 78 * MAXDIRS should be at least as large as the number of arguments that 79 * inetd allows (currently 20). 80 */ 81 #define MAXDIRS 20 82 static struct dirlist { 83 const char *name; 84 size_t len; 85 } dirs[MAXDIRS+1]; 86 static int suppress_naks; 87 static int logging; 88 static int ipchroot; 89 static int check_woth = 1; 90 static int create_new = 0; 91 static const char *newfile_format = "%Y%m%d"; 92 static int increase_name = 0; 93 static mode_t mask = S_IWGRP | S_IWOTH; 94 95 struct formats; 96 static void tftp_recvfile(int peer, const char *mode); 97 static void tftp_xmitfile(int peer, const char *mode); 98 static int validate_access(int peer, char **, int); 99 static char peername[NI_MAXHOST]; 100 101 static FILE *file; 102 103 static struct formats { 104 const char *f_mode; 105 int f_convert; 106 } formats[] = { 107 { "netascii", 1 }, 108 { "octet", 0 }, 109 { NULL, 0 } 110 }; 111 112 int 113 main(int argc, char *argv[]) 114 { 115 struct tftphdr *tp; 116 int peer; 117 socklen_t peerlen, len; 118 ssize_t n; 119 int ch; 120 char *chroot_dir = NULL; 121 struct passwd *nobody; 122 const char *chuser = "nobody"; 123 char recvbuffer[MAXPKTSIZE]; 124 int allow_ro = 1, allow_wo = 1, on = 1; 125 pid_t pid; 126 127 tzset(); /* syslog in localtime */ 128 acting_as_client = 0; 129 130 tftp_openlog("tftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 131 while ((ch = getopt(argc, argv, "cCd::F:lnoOp:s:Su:U:wW")) != -1) { 132 switch (ch) { 133 case 'c': 134 ipchroot = 1; 135 break; 136 case 'C': 137 ipchroot = 2; 138 break; 139 case 'd': 140 if (optarg == NULL) 141 debug++; 142 else if (atoi(optarg) != 0) 143 debug += atoi(optarg); 144 else 145 debug |= debug_finds(optarg); 146 break; 147 case 'F': 148 newfile_format = optarg; 149 break; 150 case 'l': 151 logging = 1; 152 break; 153 case 'n': 154 suppress_naks = 1; 155 break; 156 case 'o': 157 options_rfc_enabled = 0; 158 break; 159 case 'O': 160 options_extra_enabled = 0; 161 break; 162 case 'p': 163 packetdroppercentage = atoi(optarg); 164 tftp_log(LOG_INFO, 165 "Randomly dropping %d out of 100 packets", 166 packetdroppercentage); 167 break; 168 case 's': 169 chroot_dir = optarg; 170 break; 171 case 'S': 172 check_woth = -1; 173 break; 174 case 'u': 175 chuser = optarg; 176 break; 177 case 'U': 178 mask = strtol(optarg, NULL, 0); 179 break; 180 case 'w': 181 create_new = 1; 182 break; 183 case 'W': 184 create_new = 1; 185 increase_name = 1; 186 break; 187 default: 188 tftp_log(LOG_WARNING, 189 "ignoring unknown option -%c", ch); 190 } 191 } 192 if (optind < argc) { 193 struct dirlist *dirp; 194 195 /* Get list of directory prefixes. Skip relative pathnames. */ 196 for (dirp = dirs; optind < argc && dirp < &dirs[MAXDIRS]; 197 optind++) { 198 if (argv[optind][0] == '/') { 199 dirp->name = argv[optind]; 200 dirp->len = strlen(dirp->name); 201 dirp++; 202 } 203 } 204 } 205 else if (chroot_dir) { 206 dirs->name = "/"; 207 dirs->len = 1; 208 } 209 if (ipchroot > 0 && chroot_dir == NULL) { 210 tftp_log(LOG_ERR, "-c requires -s"); 211 exit(1); 212 } 213 214 umask(mask); 215 216 if (ioctl(0, FIONBIO, &on) < 0) { 217 tftp_log(LOG_ERR, "ioctl(FIONBIO): %s", strerror(errno)); 218 exit(1); 219 } 220 221 /* Find out who we are talking to and what we are going to do */ 222 peerlen = sizeof(peer_sock); 223 n = recvfrom(0, recvbuffer, MAXPKTSIZE, 0, 224 (struct sockaddr *)&peer_sock, &peerlen); 225 if (n < 0) { 226 tftp_log(LOG_ERR, "recvfrom: %s", strerror(errno)); 227 exit(1); 228 } 229 getnameinfo((struct sockaddr *)&peer_sock, peer_sock.ss_len, 230 peername, sizeof(peername), NULL, 0, NI_NUMERICHOST); 231 if ((size_t)n < 4 /* tftphdr */) { 232 tftp_log(LOG_ERR, "Rejecting %zd-byte request from %s", 233 n, peername); 234 exit(1); 235 } 236 237 /* 238 * Now that we have read the message out of the UDP 239 * socket, we fork and exit. Thus, inetd will go back 240 * to listening to the tftp port, and the next request 241 * to come in will start up a new instance of tftpd. 242 * 243 * We do this so that inetd can run tftpd in "wait" mode. 244 * The problem with tftpd running in "nowait" mode is that 245 * inetd may get one or more successful "selects" on the 246 * tftp port before we do our receive, so more than one 247 * instance of tftpd may be started up. Worse, if tftpd 248 * break before doing the above "recvfrom", inetd would 249 * spawn endless instances, clogging the system. 250 */ 251 pid = fork(); 252 if (pid < 0) { 253 tftp_log(LOG_ERR, "fork: %s", strerror(errno)); 254 exit(1); 255 } else if (pid != 0) { 256 exit(0); 257 } 258 /* child */ 259 260 #ifdef LIBWRAP 261 /* 262 * See if the client is allowed to talk to me. 263 * (This needs to be done before the chroot()) 264 */ 265 { 266 struct request_info req; 267 268 request_init(&req, RQ_CLIENT_ADDR, peername, 0); 269 request_set(&req, RQ_DAEMON, "tftpd", 0); 270 271 if (hosts_access(&req) == 0) { 272 if (debug & DEBUG_ACCESS) 273 tftp_log(LOG_WARNING, 274 "Access denied by 'tftpd' entry " 275 "in /etc/hosts.allow"); 276 277 /* 278 * Full access might be disabled, but maybe the 279 * client is allowed to do read-only access. 280 */ 281 request_set(&req, RQ_DAEMON, "tftpd-ro", 0); 282 allow_ro = hosts_access(&req); 283 284 request_set(&req, RQ_DAEMON, "tftpd-wo", 0); 285 allow_wo = hosts_access(&req); 286 287 if (allow_ro == 0 && allow_wo == 0) { 288 tftp_log(LOG_WARNING, 289 "Unauthorized access from %s", peername); 290 exit(1); 291 } 292 293 if (debug & DEBUG_ACCESS) { 294 if (allow_ro) 295 tftp_log(LOG_WARNING, 296 "But allowed readonly access " 297 "via 'tftpd-ro' entry"); 298 if (allow_wo) 299 tftp_log(LOG_WARNING, 300 "But allowed writeonly access " 301 "via 'tftpd-wo' entry"); 302 } 303 } else 304 if (debug & DEBUG_ACCESS) 305 tftp_log(LOG_WARNING, 306 "Full access allowed" 307 "in /etc/hosts.allow"); 308 } 309 #endif 310 311 /* 312 * Since we exit here, we should do that only after the above 313 * recvfrom to keep inetd from constantly forking should there 314 * be a problem. See the above comment about system clogging. 315 */ 316 if (chroot_dir) { 317 if (ipchroot > 0) { 318 char *tempchroot; 319 struct stat sb; 320 int statret; 321 struct sockaddr_storage ss; 322 char hbuf[NI_MAXHOST]; 323 324 statret = -1; 325 memcpy(&ss, &peer_sock, peer_sock.ss_len); 326 unmappedaddr((struct sockaddr_in6 *)&ss); 327 getnameinfo((struct sockaddr *)&ss, ss.ss_len, 328 hbuf, sizeof(hbuf), NULL, 0, 329 NI_NUMERICHOST); 330 asprintf(&tempchroot, "%s/%s", chroot_dir, hbuf); 331 if (ipchroot == 2) 332 statret = stat(tempchroot, &sb); 333 if (ipchroot == 1 || 334 (statret == 0 && (sb.st_mode & S_IFDIR))) 335 chroot_dir = tempchroot; 336 } 337 /* Must get this before chroot because /etc might go away */ 338 if ((nobody = getpwnam(chuser)) == NULL) { 339 tftp_log(LOG_ERR, "%s: no such user", chuser); 340 exit(1); 341 } 342 if (chroot(chroot_dir)) { 343 tftp_log(LOG_ERR, "chroot: %s: %s", 344 chroot_dir, strerror(errno)); 345 exit(1); 346 } 347 if (chdir("/") != 0) { 348 tftp_log(LOG_ERR, "chdir: %s", strerror(errno)); 349 exit(1); 350 } 351 if (setgroups(1, &nobody->pw_gid) != 0) { 352 tftp_log(LOG_ERR, "setgroups failed"); 353 exit(1); 354 } 355 if (setuid(nobody->pw_uid) != 0) { 356 tftp_log(LOG_ERR, "setuid failed"); 357 exit(1); 358 } 359 if (check_woth == -1) 360 check_woth = 0; 361 } 362 if (check_woth == -1) 363 check_woth = 1; 364 365 len = sizeof(me_sock); 366 if (getsockname(0, (struct sockaddr *)&me_sock, &len) == 0) { 367 switch (me_sock.ss_family) { 368 case AF_INET: 369 ((struct sockaddr_in *)&me_sock)->sin_port = 0; 370 break; 371 case AF_INET6: 372 ((struct sockaddr_in6 *)&me_sock)->sin6_port = 0; 373 break; 374 default: 375 /* unsupported */ 376 break; 377 } 378 } else { 379 memset(&me_sock, 0, sizeof(me_sock)); 380 me_sock.ss_family = peer_sock.ss_family; 381 me_sock.ss_len = peer_sock.ss_len; 382 } 383 close(STDIN_FILENO); 384 close(STDOUT_FILENO); 385 close(STDERR_FILENO); 386 peer = socket(peer_sock.ss_family, SOCK_DGRAM, 0); 387 if (peer < 0) { 388 tftp_log(LOG_ERR, "socket: %s", strerror(errno)); 389 exit(1); 390 } 391 if (bind(peer, (struct sockaddr *)&me_sock, me_sock.ss_len) < 0) { 392 tftp_log(LOG_ERR, "bind: %s", strerror(errno)); 393 exit(1); 394 } 395 396 tp = (struct tftphdr *)recvbuffer; 397 tp->th_opcode = ntohs(tp->th_opcode); 398 if (tp->th_opcode == RRQ) { 399 if (allow_ro) 400 tftp_rrq(peer, tp->th_stuff, (size_t)n - 1); 401 else { 402 tftp_log(LOG_WARNING, 403 "%s read access denied", peername); 404 exit(1); 405 } 406 } else if (tp->th_opcode == WRQ) { 407 if (allow_wo) 408 tftp_wrq(peer, tp->th_stuff, (size_t)n - 1); 409 else { 410 tftp_log(LOG_WARNING, 411 "%s write access denied", peername); 412 exit(1); 413 } 414 } else 415 send_error(peer, EBADOP); 416 exit(1); 417 } 418 419 static void 420 reduce_path(char *fn) 421 { 422 char *slash, *ptr; 423 424 /* Reduce all "/+./" to "/" (just in case we've got "/./../" later */ 425 while ((slash = strstr(fn, "/./")) != NULL) { 426 for (ptr = slash; ptr > fn && ptr[-1] == '/'; ptr--) 427 ; 428 slash += 2; 429 while (*slash) 430 *++ptr = *++slash; 431 } 432 433 /* Now reduce all "/something/+../" to "/" */ 434 while ((slash = strstr(fn, "/../")) != NULL) { 435 if (slash == fn) 436 break; 437 for (ptr = slash; ptr > fn && ptr[-1] == '/'; ptr--) 438 ; 439 for (ptr--; ptr >= fn; ptr--) 440 if (*ptr == '/') 441 break; 442 if (ptr < fn) 443 break; 444 slash += 3; 445 while (*slash) 446 *++ptr = *++slash; 447 } 448 } 449 450 static char * 451 parse_header(int peer, char *recvbuffer, size_t size, 452 char **filename, char **mode) 453 { 454 char *cp; 455 int i; 456 struct formats *pf; 457 458 *mode = NULL; 459 cp = recvbuffer; 460 461 i = get_field(peer, recvbuffer, size); 462 if (i >= PATH_MAX) { 463 tftp_log(LOG_ERR, "Bad option - filename too long"); 464 send_error(peer, EBADOP); 465 exit(1); 466 } 467 *filename = recvbuffer; 468 tftp_log(LOG_INFO, "Filename: '%s'", *filename); 469 cp += i; 470 471 i = get_field(peer, cp, size); 472 *mode = cp; 473 cp += i; 474 475 /* Find the file transfer mode */ 476 for (cp = *mode; *cp; cp++) 477 if (isupper(*cp)) 478 *cp = tolower(*cp); 479 for (pf = formats; pf->f_mode; pf++) 480 if (strcmp(pf->f_mode, *mode) == 0) 481 break; 482 if (pf->f_mode == NULL) { 483 tftp_log(LOG_ERR, 484 "Bad option - Unknown transfer mode (%s)", *mode); 485 send_error(peer, EBADOP); 486 exit(1); 487 } 488 tftp_log(LOG_INFO, "Mode: '%s'", *mode); 489 490 return (cp + 1); 491 } 492 493 /* 494 * WRQ - receive a file from the client 495 */ 496 void 497 tftp_wrq(int peer, char *recvbuffer, size_t size) 498 { 499 char *cp; 500 int has_options = 0, ecode; 501 char *filename, *mode; 502 char fnbuf[PATH_MAX]; 503 504 cp = parse_header(peer, recvbuffer, size, &filename, &mode); 505 size -= (cp - recvbuffer) + 1; 506 507 strlcpy(fnbuf, filename, sizeof(fnbuf)); 508 reduce_path(fnbuf); 509 filename = fnbuf; 510 511 if (size > 0) { 512 if (options_rfc_enabled) 513 has_options = !parse_options(peer, cp, size); 514 else 515 tftp_log(LOG_INFO, "Options found but not enabled"); 516 } 517 518 ecode = validate_access(peer, &filename, WRQ); 519 if (ecode == 0) { 520 if (has_options) 521 send_oack(peer); 522 else 523 send_ack(peer, 0); 524 } 525 if (logging) { 526 tftp_log(LOG_INFO, "%s: write request for %s: %s", peername, 527 filename, errtomsg(ecode)); 528 } 529 530 if (ecode) { 531 send_error(peer, ecode); 532 exit(1); 533 } 534 tftp_recvfile(peer, mode); 535 exit(0); 536 } 537 538 /* 539 * RRQ - send a file to the client 540 */ 541 void 542 tftp_rrq(int peer, char *recvbuffer, size_t size) 543 { 544 char *cp; 545 int has_options = 0, ecode; 546 char *filename, *mode; 547 char fnbuf[PATH_MAX]; 548 549 cp = parse_header(peer, recvbuffer, size, &filename, &mode); 550 size -= (cp - recvbuffer) + 1; 551 552 strlcpy(fnbuf, filename, sizeof(fnbuf)); 553 reduce_path(fnbuf); 554 filename = fnbuf; 555 556 if (size > 0) { 557 if (options_rfc_enabled) 558 has_options = !parse_options(peer, cp, size); 559 else 560 tftp_log(LOG_INFO, "Options found but not enabled"); 561 } 562 563 ecode = validate_access(peer, &filename, RRQ); 564 if (ecode == 0) { 565 if (has_options) { 566 int n; 567 char lrecvbuffer[MAXPKTSIZE]; 568 struct tftphdr *rp = (struct tftphdr *)lrecvbuffer; 569 570 send_oack(peer); 571 n = receive_packet(peer, lrecvbuffer, MAXPKTSIZE, 572 NULL, timeoutpacket); 573 if (n < 0) { 574 if (debug & DEBUG_SIMPLE) 575 tftp_log(LOG_DEBUG, "Aborting: %s", 576 rp_strerror(n)); 577 return; 578 } 579 if (rp->th_opcode != ACK) { 580 if (debug & DEBUG_SIMPLE) 581 tftp_log(LOG_DEBUG, 582 "Expected ACK, got %s on OACK", 583 packettype(rp->th_opcode)); 584 return; 585 } 586 } 587 } 588 589 if (logging) 590 tftp_log(LOG_INFO, "%s: read request for %s: %s", peername, 591 filename, errtomsg(ecode)); 592 593 if (ecode) { 594 /* 595 * Avoid storms of naks to a RRQ broadcast for a relative 596 * bootfile pathname from a diskless Sun. 597 */ 598 if (suppress_naks && *filename != '/' && ecode == ENOTFOUND) 599 exit(0); 600 send_error(peer, ecode); 601 exit(1); 602 } 603 tftp_xmitfile(peer, mode); 604 } 605 606 /* 607 * Find the next value for YYYYMMDD.nn when the file to be written should 608 * be unique. Due to the limitations of nn, we will fail if nn reaches 100. 609 * Besides, that is four updates per hour on a file, which is kind of 610 * execessive anyway. 611 */ 612 static int 613 find_next_name(char *filename, int *fd) 614 { 615 int i; 616 time_t tval; 617 size_t len; 618 struct tm lt; 619 char yyyymmdd[MAXPATHLEN]; 620 char newname[MAXPATHLEN]; 621 622 /* Create the YYYYMMDD part of the filename */ 623 time(&tval); 624 lt = *localtime(&tval); 625 len = strftime(yyyymmdd, sizeof(yyyymmdd), newfile_format, <); 626 if (len == 0) { 627 syslog(LOG_WARNING, 628 "Filename suffix too long (%d characters maximum)", 629 MAXPATHLEN); 630 return (EACCESS); 631 } 632 633 /* Make sure the new filename is not too long */ 634 if (strlen(filename) > MAXPATHLEN - len - 5) { 635 syslog(LOG_WARNING, 636 "Filename too long (%zd characters, %zd maximum)", 637 strlen(filename), MAXPATHLEN - len - 5); 638 return (EACCESS); 639 } 640 641 /* Find the first file which doesn't exist */ 642 for (i = 0; i < 100; i++) { 643 sprintf(newname, "%s.%s.%02d", filename, yyyymmdd, i); 644 *fd = open(newname, 645 O_WRONLY | O_CREAT | O_EXCL, 646 S_IRUSR | S_IWUSR | S_IRGRP | 647 S_IWGRP | S_IROTH | S_IWOTH); 648 if (*fd > 0) 649 return 0; 650 } 651 652 return (EEXIST); 653 } 654 655 /* 656 * Validate file access. Since we 657 * have no uid or gid, for now require 658 * file to exist and be publicly 659 * readable/writable. 660 * If we were invoked with arguments 661 * from inetd then the file must also be 662 * in one of the given directory prefixes. 663 * Note also, full path name must be 664 * given as we have no login directory. 665 */ 666 int 667 validate_access(int peer, char **filep, int mode) 668 { 669 struct stat stbuf; 670 int fd; 671 int error; 672 struct dirlist *dirp; 673 static char pathname[MAXPATHLEN]; 674 char *filename = *filep; 675 676 /* 677 * Prevent tricksters from getting around the directory restrictions 678 */ 679 if (strstr(filename, "/../")) 680 return (EACCESS); 681 682 if (*filename == '/') { 683 /* 684 * Allow the request if it's in one of the approved locations. 685 * Special case: check the null prefix ("/") by looking 686 * for length = 1 and relying on the arg. processing that 687 * it's a /. 688 */ 689 for (dirp = dirs; dirp->name != NULL; dirp++) { 690 if (dirp->len == 1) 691 break; 692 if (strncmp(filename, dirp->name, dirp->len) == 0 && 693 filename[dirp->len] == '/') 694 break; 695 } 696 /* If directory list is empty, allow access to any file */ 697 if (dirp->name == NULL && dirp != dirs) 698 return (EACCESS); 699 if (stat(filename, &stbuf) < 0) 700 return (errno == ENOENT ? ENOTFOUND : EACCESS); 701 if ((stbuf.st_mode & S_IFMT) != S_IFREG) 702 return (ENOTFOUND); 703 if (mode == RRQ) { 704 if ((stbuf.st_mode & S_IROTH) == 0) 705 return (EACCESS); 706 } else { 707 if (check_woth && ((stbuf.st_mode & S_IWOTH) == 0)) 708 return (EACCESS); 709 } 710 } else { 711 int err; 712 713 /* 714 * Relative file name: search the approved locations for it. 715 * Don't allow write requests that avoid directory 716 * restrictions. 717 */ 718 719 if (!strncmp(filename, "../", 3)) 720 return (EACCESS); 721 722 /* 723 * If the file exists in one of the directories and isn't 724 * readable, continue looking. However, change the error code 725 * to give an indication that the file exists. 726 */ 727 err = ENOTFOUND; 728 for (dirp = dirs; dirp->name != NULL; dirp++) { 729 snprintf(pathname, sizeof(pathname), "%s/%s", 730 dirp->name, filename); 731 if (stat(pathname, &stbuf) == 0 && 732 (stbuf.st_mode & S_IFMT) == S_IFREG) { 733 if (mode == RRQ) { 734 if ((stbuf.st_mode & S_IROTH) != 0) 735 break; 736 } else { 737 if (!check_woth || ((stbuf.st_mode & S_IWOTH) != 0)) 738 break; 739 } 740 err = EACCESS; 741 } 742 } 743 if (dirp->name != NULL) 744 *filep = filename = pathname; 745 else if (mode == RRQ) 746 return (err); 747 else if (err != ENOTFOUND || !create_new) 748 return (err); 749 } 750 751 /* 752 * This option is handled here because it (might) require(s) the 753 * size of the file. 754 */ 755 option_tsize(peer, NULL, mode, &stbuf); 756 757 if (mode == RRQ) 758 fd = open(filename, O_RDONLY); 759 else { 760 if (create_new) { 761 if (increase_name) { 762 error = find_next_name(filename, &fd); 763 if (error > 0) 764 return (error + 100); 765 } else 766 fd = open(filename, 767 O_WRONLY | O_TRUNC | O_CREAT, 768 S_IRUSR | S_IWUSR | S_IRGRP | 769 S_IWGRP | S_IROTH | S_IWOTH ); 770 } else 771 fd = open(filename, O_WRONLY | O_TRUNC); 772 } 773 if (fd < 0) 774 return (errno + 100); 775 file = fdopen(fd, (mode == RRQ)? "r":"w"); 776 if (file == NULL) { 777 close(fd); 778 return (errno + 100); 779 } 780 return (0); 781 } 782 783 static void 784 tftp_xmitfile(int peer, const char *mode) 785 { 786 uint16_t block; 787 time_t now; 788 struct tftp_stats ts; 789 790 memset(&ts, 0, sizeof(ts)); 791 now = time(NULL); 792 if (debug & DEBUG_SIMPLE) 793 tftp_log(LOG_DEBUG, "Transmitting file"); 794 795 read_init(0, file, mode); 796 block = 1; 797 tftp_send(peer, &block, &ts); 798 read_close(); 799 if (debug & DEBUG_SIMPLE) 800 tftp_log(LOG_INFO, "Sent %jd bytes in %jd seconds", 801 (intmax_t)ts.amount, (intmax_t)time(NULL) - now); 802 } 803 804 static void 805 tftp_recvfile(int peer, const char *mode) 806 { 807 uint16_t block; 808 struct timeval now1, now2; 809 struct tftp_stats ts; 810 811 gettimeofday(&now1, NULL); 812 if (debug & DEBUG_SIMPLE) 813 tftp_log(LOG_DEBUG, "Receiving file"); 814 815 write_init(0, file, mode); 816 817 block = 0; 818 tftp_receive(peer, &block, &ts, NULL, 0); 819 820 gettimeofday(&now2, NULL); 821 822 if (debug & DEBUG_SIMPLE) { 823 double f; 824 if (now1.tv_usec > now2.tv_usec) { 825 now2.tv_usec += 1000000; 826 now2.tv_sec--; 827 } 828 829 f = now2.tv_sec - now1.tv_sec + 830 (now2.tv_usec - now1.tv_usec) / 100000.0; 831 tftp_log(LOG_INFO, 832 "Download of %jd bytes in %d blocks completed after %0.1f seconds\n", 833 (intmax_t)ts.amount, block, f); 834 } 835 836 return; 837 } 838