ftpd.c revision 1.68
1 /* $NetBSD: ftpd.c,v 1.68 1999/07/27 15:41:49 itojun Exp $ */ 2 3 /* 4 * Copyright (C) 1997 and 1998 WIDE Project. 5 * 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 project 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 PROJECT 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 PROJECT 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 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the University of 47 * California, Berkeley and its contributors. 48 * 4. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 /* 66 * Copyright (c) 1998, 1999 The NetBSD Foundation, Inc. 67 * All rights reserved. 68 * 69 * This code is derived from software contributed to The NetBSD Foundation 70 * by Luke Mewburn. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. All advertising materials mentioning features or use of this software 81 * must display the following acknowledgement: 82 * This product includes software developed by the NetBSD 83 * Foundation, Inc. and its contributors. 84 * 4. Neither the name of The NetBSD Foundation nor the names of its 85 * contributors may be used to endorse or promote products derived 86 * from this software without specific prior written permission. 87 * 88 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 89 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 90 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 91 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 92 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 93 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 94 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 95 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 96 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 97 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 98 * POSSIBILITY OF SUCH DAMAGE. 99 */ 100 101 #include <sys/cdefs.h> 102 #ifndef lint 103 __COPYRIGHT( 104 "@(#) Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994\n\ 105 The Regents of the University of California. All rights reserved.\n"); 106 #endif /* not lint */ 107 108 #ifndef lint 109 #if 0 110 static char sccsid[] = "@(#)ftpd.c 8.5 (Berkeley) 4/28/95"; 111 #else 112 __RCSID("$NetBSD: ftpd.c,v 1.68 1999/07/27 15:41:49 itojun Exp $"); 113 #endif 114 #endif /* not lint */ 115 116 /* 117 * FTP server. 118 */ 119 #include <sys/param.h> 120 #include <sys/stat.h> 121 #include <sys/ioctl.h> 122 #include <sys/socket.h> 123 #include <sys/wait.h> 124 125 #include <netinet/in.h> 126 #include <netinet/in_systm.h> 127 #include <netinet/ip.h> 128 129 #define FTP_NAMES 130 #include <arpa/ftp.h> 131 #include <arpa/inet.h> 132 #include <arpa/telnet.h> 133 134 #include <ctype.h> 135 #include <dirent.h> 136 #include <err.h> 137 #include <errno.h> 138 #include <fcntl.h> 139 #include <fnmatch.h> 140 #include <glob.h> 141 #include <limits.h> 142 #include <netdb.h> 143 #include <pwd.h> 144 #include <setjmp.h> 145 #include <signal.h> 146 #include <stdio.h> 147 #include <stdlib.h> 148 #include <string.h> 149 #include <syslog.h> 150 #include <time.h> 151 #include <unistd.h> 152 #ifdef SKEY 153 #include <skey.h> 154 #endif 155 #ifdef KERBEROS5 156 #include <krb5.h> 157 #endif 158 159 #include "extern.h" 160 #include "pathnames.h" 161 162 #if __STDC__ 163 #include <stdarg.h> 164 #else 165 #include <varargs.h> 166 #endif 167 168 #ifndef TRUE 169 #define TRUE 1 170 #define FALSE 0 171 #endif 172 173 const char version[] = "Version: 7.2.0"; 174 175 union sockunion ctrl_addr; 176 union sockunion data_source; 177 union sockunion data_dest; 178 union sockunion his_addr; 179 union sockunion pasv_addr; 180 181 int data; 182 jmp_buf errcatch, urgcatch; 183 int logged_in; 184 struct passwd *pw; 185 int debug; 186 int sflag; 187 int logging; 188 int guest; 189 int dochroot; 190 int type; 191 int form; 192 int stru; /* avoid C keyword */ 193 int mode; 194 int usedefault = 1; /* for data transfers */ 195 int pdata = -1; /* for passive mode */ 196 int family = AF_INET; 197 sig_atomic_t transflag; 198 off_t file_size; 199 off_t byte_count; 200 char tmpline[7]; 201 char hostname[MAXHOSTNAMELEN+1]; 202 char remotehost[MAXHOSTNAMELEN+1]; 203 static char ttyline[20]; 204 char *tty = ttyline; /* for klogin */ 205 206 off_t total_data_in; /* total file data bytes received */ 207 off_t total_data_out; /* total file data bytes sent data */ 208 off_t total_data; /* total file data bytes transferred data */ 209 off_t total_files_in; /* total number of data files received */ 210 off_t total_files_out; /* total number of data files sent */ 211 off_t total_files; /* total number of data files transferred */ 212 off_t total_bytes_in; /* total bytes received */ 213 off_t total_bytes_out; /* total bytes sent */ 214 off_t total_bytes; /* total bytes transferred */ 215 off_t total_xfers_in; /* total number of xfers incoming */ 216 off_t total_xfers_out; /* total number of xfers outgoing */ 217 off_t total_xfers; /* total number of xfers */ 218 219 static char *anondir = NULL; 220 static char confdir[MAXPATHLEN]; 221 222 #if defined(KERBEROS) || defined(KERBEROS5) 223 int notickets = 1; 224 char *krbtkfile_env = NULL; 225 #endif 226 227 int epsvall = 0; 228 229 /* 230 * Timeout intervals for retrying connections 231 * to hosts that don't accept PORT cmds. This 232 * is a kludge, but given the problems with TCP... 233 */ 234 #define SWAITMAX 90 /* wait at most 90 seconds */ 235 #define SWAITINT 5 /* interval between retries */ 236 237 int swaitmax = SWAITMAX; 238 int swaitint = SWAITINT; 239 240 #ifdef HASSETPROCTITLE 241 char proctitle[BUFSIZ]; /* initial part of title */ 242 #endif /* HASSETPROCTITLE */ 243 244 static void ack __P((const char *)); 245 static void myoob __P((int)); 246 static int checkuser __P((const char *, const char *, int, int)); 247 static int checkaccess __P((const char *)); 248 static FILE *dataconn __P((const char *, off_t, const char *)); 249 static void dolog __P((struct sockaddr *)); 250 static void end_login __P((void)); 251 static FILE *getdatasock __P((const char *)); 252 static char *gunique __P((const char *)); 253 static void lostconn __P((int)); 254 static int receive_data __P((FILE *, FILE *)); 255 static void replydirname __P((const char *, const char *)); 256 static int send_data __P((FILE *, FILE *, off_t, int)); 257 static struct passwd * 258 sgetpwnam __P((const char *)); 259 260 int main __P((int, char *[])); 261 262 #if defined(KERBEROS) || defined(KERBEROS5) 263 int klogin __P((struct passwd *, char *, char *, char *)); 264 void kdestroy __P((void)); 265 #endif 266 267 int 268 main(argc, argv) 269 int argc; 270 char *argv[]; 271 { 272 int addrlen, ch, on = 1, tos, keepalive; 273 char *cp, line[LINE_MAX]; 274 FILE *fd; 275 #ifdef KERBEROS5 276 krb5_error_code kerror; 277 #endif 278 279 debug = 0; 280 logging = 0; 281 sflag = 0; 282 (void)strcpy(confdir, _DEFAULT_CONFDIR); 283 284 while ((ch = getopt(argc, argv, "a:c:C:dlst:T:u:v46")) != -1) { 285 switch (ch) { 286 case 'a': 287 anondir = optarg; 288 break; 289 290 case 'c': 291 (void)strncpy(confdir, optarg, sizeof(confdir)); 292 confdir[sizeof(confdir)-1] = '\0'; 293 break; 294 295 case 'C': 296 exit(checkaccess(optarg)); 297 /* NOTREACHED */ 298 299 case 'd': 300 case 'v': /* deprecated */ 301 debug = 1; 302 break; 303 304 case 'l': 305 logging++; /* > 1 == extra logging */ 306 break; 307 308 case 's': 309 sflag = 1; 310 break; 311 312 case 't': 313 case 'T': 314 case 'u': 315 warnx("-%c has been deprecated in favour of ftpd.conf", 316 ch); 317 break; 318 319 case '4': 320 family = AF_INET; 321 break; 322 323 case '6': 324 family = AF_INET6; 325 break; 326 327 default: 328 if (optopt == 'a' || optopt == 'C') 329 exit(1); 330 warnx("unknown flag -%c ignored", optopt); 331 break; 332 } 333 } 334 335 /* 336 * LOG_NDELAY sets up the logging connection immediately, 337 * necessary for anonymous ftp's that chroot and can't do it later. 338 */ 339 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 340 addrlen = sizeof(his_addr); /* xxx */ 341 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) { 342 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 343 exit(1); 344 } 345 addrlen = sizeof(ctrl_addr); 346 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 347 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 348 exit(1); 349 } 350 if (his_addr.su_family == AF_INET6 351 && IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr)) { 352 #if 1 353 /* 354 * IPv4 control connection arrived to AF_INET6 socket. 355 * I hate to do this, but this is the easiest solution. 356 */ 357 union sockunion tmp_addr; 358 359 tmp_addr = his_addr; 360 memset(&his_addr, 0, sizeof(his_addr)); 361 his_addr.su_sin.sin_family = AF_INET; 362 his_addr.su_sin.sin_len = sizeof(his_addr.su_sin); 363 memcpy(&his_addr.su_sin.sin_addr, 364 &tmp_addr.su_sin6.sin6_addr.s6_addr32[3], 365 sizeof(his_addr.su_sin.sin_addr)); 366 his_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port; 367 368 tmp_addr = ctrl_addr; 369 memset(&ctrl_addr, 0, sizeof(ctrl_addr)); 370 ctrl_addr.su_sin.sin_family = AF_INET; 371 ctrl_addr.su_sin.sin_len = sizeof(ctrl_addr.su_sin); 372 memcpy(&ctrl_addr.su_sin.sin_addr, 373 &tmp_addr.su_sin6.sin6_addr.s6_addr32[3], 374 sizeof(ctrl_addr.su_sin.sin_addr)); 375 ctrl_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port; 376 #else 377 while (fgets(line, sizeof(line), fd) != NULL) { 378 if ((cp = strchr(line, '\n')) != NULL) 379 *cp = '\0'; 380 lreply(530, "%s", line); 381 } 382 (void) fflush(stdout); 383 (void) fclose(fd); 384 reply(530, 385 "Connection from IPv4 mapped address is not supported."); 386 exit(0); 387 #endif 388 } 389 #ifdef IP_TOS 390 if (family == AF_INET) { 391 tos = IPTOS_LOWDELAY; 392 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, 393 sizeof(int)) < 0) 394 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 395 } 396 #endif 397 data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1); 398 399 /* set this here so klogin can use it... */ 400 (void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid()); 401 402 (void) freopen(_PATH_DEVNULL, "w", stderr); 403 (void) signal(SIGPIPE, lostconn); 404 (void) signal(SIGCHLD, SIG_IGN); 405 if ((long)signal(SIGURG, myoob) < 0) 406 syslog(LOG_ERR, "signal: %m"); 407 408 /* Try to handle urgent data inline */ 409 #ifdef SO_OOBINLINE 410 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 411 syslog(LOG_ERR, "setsockopt: %m"); 412 #endif 413 /* Set keepalives on the socket to detect dropped connections. */ 414 #ifdef SO_KEEPALIVE 415 keepalive = 1; 416 if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive, 417 sizeof(int)) < 0) 418 syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); 419 #endif 420 421 #ifdef F_SETOWN 422 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 423 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 424 #endif 425 dolog((struct sockaddr *)&his_addr); 426 /* 427 * Set up default state 428 */ 429 data = -1; 430 type = TYPE_A; 431 form = FORM_N; 432 stru = STRU_F; 433 mode = MODE_S; 434 tmpline[0] = '\0'; 435 hasyyerrored = 0; 436 437 #ifdef KERBEROS5 438 kerror = krb5_init_context(&kcontext); 439 if (kerror) { 440 syslog(LOG_NOTICE, "%s when initializing Kerberos context", 441 error_message(kerror)); 442 exit(0); 443 } 444 #endif /* KERBEROS5 */ 445 446 /* If logins are disabled, print out the message. */ 447 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) { 448 lreply(530, ""); 449 while (fgets(line, sizeof(line), fd) != NULL) { 450 if ((cp = strchr(line, '\n')) != NULL) 451 *cp = '\0'; 452 lreply(0, "%s", line); 453 } 454 (void) fflush(stdout); 455 (void) fclose(fd); 456 reply(530, "System not available."); 457 exit(0); 458 } 459 if ((fd = fopen(conffilename(_PATH_FTPWELCOME), "r")) != NULL) { 460 lreply(220, ""); 461 while (fgets(line, sizeof(line), fd) != NULL) { 462 if ((cp = strchr(line, '\n')) != NULL) 463 *cp = '\0'; 464 lreply(0, "%s", line); 465 } 466 (void) fflush(stdout); 467 (void) fclose(fd); 468 /* reply(220,) must follow */ 469 } 470 (void)gethostname(hostname, sizeof(hostname)); 471 hostname[sizeof(hostname) - 1] = '\0'; 472 reply(220, "%s FTP server (%s) ready.", hostname, version); 473 curclass.timeout = 300; /* 5 minutes, as per login(1) */ 474 (void) setjmp(errcatch); 475 for (;;) 476 (void) yyparse(); 477 /* NOTREACHED */ 478 } 479 480 static void 481 lostconn(signo) 482 int signo; 483 { 484 485 if (debug) 486 syslog(LOG_DEBUG, "lost connection"); 487 dologout(1); 488 } 489 490 /* 491 * Save the result of a getpwnam. Used for USER command, since 492 * the data returned must not be clobbered by any other command 493 * (e.g., globbing). 494 */ 495 static struct passwd * 496 sgetpwnam(name) 497 const char *name; 498 { 499 static struct passwd save; 500 struct passwd *p; 501 502 if ((p = getpwnam(name)) == NULL) 503 return (p); 504 if (save.pw_name) { 505 free((char *)save.pw_name); 506 free((char *)save.pw_passwd); 507 free((char *)save.pw_gecos); 508 free((char *)save.pw_dir); 509 free((char *)save.pw_shell); 510 } 511 save = *p; 512 save.pw_name = xstrdup(p->pw_name); 513 save.pw_passwd = xstrdup(p->pw_passwd); 514 save.pw_gecos = xstrdup(p->pw_gecos); 515 save.pw_dir = xstrdup(p->pw_dir); 516 save.pw_shell = xstrdup(p->pw_shell); 517 return (&save); 518 } 519 520 static int login_attempts; /* number of failed login attempts */ 521 static int askpasswd; /* had user command, ask for passwd */ 522 static char curname[10]; /* current USER name */ 523 524 /* 525 * USER command. 526 * Sets global passwd pointer pw if named account exists and is acceptable; 527 * sets askpasswd if a PASS command is expected. If logged in previously, 528 * need to reset state. If name is "ftp" or "anonymous", the name is not in 529 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 530 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 531 * requesting login privileges. Disallow anyone who does not have a standard 532 * shell as returned by getusershell(). Disallow anyone mentioned in the file 533 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 534 */ 535 void 536 user(name) 537 const char *name; 538 { 539 if (logged_in) { 540 if (guest) { 541 reply(530, "Can't change user from guest login."); 542 return; 543 } else if (dochroot) { 544 reply(530, "Can't change user from chroot user."); 545 return; 546 } 547 end_login(); 548 } 549 550 #if defined(KERBEROS) || defined(KERBEROS5) 551 kdestroy(); 552 #endif 553 554 guest = 0; 555 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 556 if (checkaccess("ftp") || checkaccess("anonymous")) 557 reply(530, "User %s access denied.", name); 558 else if ((pw = sgetpwnam("ftp")) != NULL) { 559 guest = 1; 560 askpasswd = 1; 561 reply(331, 562 "Guest login ok, type your name as password."); 563 } else 564 reply(530, "User %s unknown.", name); 565 if (!askpasswd && logging) 566 syslog(LOG_NOTICE, 567 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 568 return; 569 } 570 571 pw = sgetpwnam(name); 572 if (logging) 573 strncpy(curname, name, sizeof(curname)-1); 574 575 #ifdef SKEY 576 if (skey_haskey(name) == 0) { 577 char *myskey; 578 579 myskey = skey_keyinfo(name); 580 reply(331, "Password [%s] required for %s.", 581 myskey ? myskey : "error getting challenge", name); 582 } else 583 #endif 584 reply(331, "Password required for %s.", name); 585 586 askpasswd = 1; 587 /* 588 * Delay before reading passwd after first failed 589 * attempt to slow down passwd-guessing programs. 590 */ 591 if (login_attempts) 592 sleep((unsigned) login_attempts); 593 } 594 595 /* 596 * Determine whether something is to happen (allow access, chroot) 597 * for a user. Each line is a shell-style glob followed by 598 * `yes' or `no'. 599 * 600 * For backward compatability, `allow' and `deny' are synonymns 601 * for `yes' and `no', respectively. 602 * 603 * Each glob is matched against the username in turn, and the first 604 * match found is used. If no match is found, the result is the 605 * argument `def'. If a match is found but without and explicit 606 * `yes'/`no', the result is the opposite of def. 607 * 608 * If the file doesn't exist at all, the result is the argument 609 * `nofile' 610 * 611 * Any line starting with `#' is considered a comment and ignored. 612 * 613 * Returns FALSE if the user is denied, or TRUE if they are allowed. 614 */ 615 int 616 checkuser(fname, name, def, nofile) 617 const char *fname, *name; 618 int def, nofile; 619 { 620 FILE *fd; 621 int retval; 622 char *glob, *perm, line[BUFSIZ]; 623 624 retval = def; 625 if ((fd = fopen(conffilename(fname), "r")) == NULL) 626 return nofile; 627 628 while (fgets(line, sizeof(line), fd) != NULL) { 629 glob = strtok(line, " \t\n"); 630 if (glob[0] == '#') 631 continue; 632 perm = strtok(NULL, " \t\n"); 633 if (fnmatch(glob, name, 0) == 0) { 634 if (perm != NULL && 635 ((strcasecmp(perm, "allow") == 0) || 636 (strcasecmp(perm, "yes") == 0))) 637 retval = TRUE; 638 else if (perm != NULL && 639 ((strcasecmp(perm, "deny") == 0) || 640 (strcasecmp(perm, "no") == 0))) 641 retval = FALSE; 642 else 643 retval = !def; 644 break; 645 } 646 } 647 (void) fclose(fd); 648 return (retval); 649 } 650 651 /* 652 * Check if user is allowed by /etc/ftpusers 653 * returns 0 for yes, 1 for no 654 */ 655 int 656 checkaccess(name) 657 const char *name; 658 { 659 660 return (! checkuser(_PATH_FTPUSERS, name, TRUE, FALSE)); 661 } 662 663 /* 664 * Terminate login as previous user, if any, resetting state; 665 * used when USER command is given or login fails. 666 */ 667 static void 668 end_login() 669 { 670 671 (void) seteuid((uid_t)0); 672 if (logged_in) 673 logwtmp(ttyline, "", ""); 674 pw = NULL; 675 logged_in = 0; 676 guest = 0; 677 dochroot = 0; 678 } 679 680 void 681 pass(passwd) 682 const char *passwd; 683 { 684 int rval; 685 FILE *fd; 686 char const *cp, *shell, *home; 687 688 if (logged_in || askpasswd == 0) { 689 reply(503, "Login with USER first."); 690 return; 691 } 692 askpasswd = 0; 693 if (!guest) { /* "ftp" is only account allowed no password */ 694 if (pw == NULL) { 695 rval = 1; /* failure below */ 696 goto skip; 697 } 698 #ifdef KERBEROS 699 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 700 rval = 0; 701 goto skip; 702 } 703 #endif 704 #ifdef KERBEROS5 705 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 706 rval = 0; 707 goto skip; 708 } 709 #endif 710 #ifdef SKEY 711 if (skey_haskey(pw->pw_name) == 0) { 712 char *p; 713 int r; 714 715 p = xstrdup(passwd); 716 r = skey_passcheck(pw->pw_name, p); 717 free(p); 718 if (r != -1) { 719 rval = 0; 720 goto skip; 721 } 722 } 723 #endif 724 if (!sflag && *pw->pw_passwd != '\0' && 725 !strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd)) { 726 rval = 0; 727 goto skip; 728 } 729 rval = 1; 730 731 skip: 732 if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire) 733 rval = 2; 734 /* 735 * If rval > 0, the user failed the authentication check 736 * above. If rval == 0, either Kerberos or local authentication 737 * succeeded. 738 */ 739 if (rval) { 740 reply(530, rval == 2 ? "Password expired." : 741 "Login incorrect."); 742 if (logging) { 743 syslog(LOG_NOTICE, 744 "FTP LOGIN FAILED FROM %s", remotehost); 745 syslog(LOG_AUTHPRIV | LOG_NOTICE, 746 "FTP LOGIN FAILED FROM %s, %s", 747 remotehost, curname); 748 } 749 pw = NULL; 750 if (login_attempts++ >= 5) { 751 syslog(LOG_NOTICE, 752 "repeated login failures from %s", 753 remotehost); 754 exit(0); 755 } 756 return; 757 } 758 } 759 760 /* password was ok; see if anything else prevents login */ 761 if (checkaccess(pw->pw_name)) { 762 reply(530, "User %s may not use FTP.", pw->pw_name); 763 if (logging) 764 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 765 remotehost, pw->pw_name); 766 pw = (struct passwd *) NULL; 767 return; 768 } 769 /* check for valid shell, if not guest user */ 770 if ((shell = pw->pw_shell) == NULL || *shell == 0) 771 shell = _PATH_BSHELL; 772 while ((cp = getusershell()) != NULL) 773 if (strcmp(cp, shell) == 0) 774 break; 775 endusershell(); 776 if (cp == NULL && guest == 0) { 777 reply(530, "User %s may not use FTP.", pw->pw_name); 778 if (logging) 779 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 780 remotehost, pw->pw_name); 781 pw = (struct passwd *) NULL; 782 return; 783 } 784 785 login_attempts = 0; /* this time successful */ 786 if (setegid((gid_t)pw->pw_gid) < 0) { 787 reply(550, "Can't set gid."); 788 return; 789 } 790 (void) initgroups(pw->pw_name, pw->pw_gid); 791 792 /* open wtmp before chroot */ 793 logwtmp(ttyline, pw->pw_name, remotehost); 794 logged_in = 1; 795 796 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name, FALSE, FALSE); 797 798 /* parse ftpd.conf, setting up various parameters */ 799 if (guest) 800 parse_conf(CLASS_GUEST); 801 else if (dochroot) 802 parse_conf(CLASS_CHROOT); 803 else 804 parse_conf(CLASS_REAL); 805 806 home = "/"; 807 if (guest) { 808 /* 809 * We MUST do a chdir() after the chroot. Otherwise 810 * the old current directory will be accessible as "." 811 * outside the new root! 812 */ 813 if (chroot(anondir ? anondir : pw->pw_dir) < 0 || 814 chdir("/") < 0) { 815 reply(550, "Can't set guest privileges."); 816 goto bad; 817 } 818 } else if (dochroot) { 819 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 820 reply(550, "Can't change root."); 821 goto bad; 822 } 823 } else if (chdir(pw->pw_dir) < 0) { 824 if (chdir("/") < 0) { 825 reply(530, "User %s: can't change directory to %s.", 826 pw->pw_name, pw->pw_dir); 827 goto bad; 828 } else 829 lreply(230, "No directory! Logging in with home=/"); 830 } else 831 home = pw->pw_dir; 832 if (seteuid((uid_t)pw->pw_uid) < 0) { 833 reply(550, "Can't set uid."); 834 goto bad; 835 } 836 setenv("HOME", home, 1); 837 838 839 /* 840 * Display a login message, if it exists. 841 * N.B. reply(230,) must follow the message. 842 */ 843 if ((fd = fopen(conffilename(_PATH_FTPLOGINMESG), "r")) != NULL) { 844 char *cp, line[LINE_MAX]; 845 846 lreply(230, ""); 847 while (fgets(line, sizeof(line), fd) != NULL) { 848 if ((cp = strchr(line, '\n')) != NULL) 849 *cp = '\0'; 850 lreply(0, "%s", line); 851 } 852 (void) fflush(stdout); 853 (void) fclose(fd); 854 } 855 show_chdir_messages(230); 856 if (guest) { 857 reply(230, "Guest login ok, access restrictions apply."); 858 #ifdef HASSETPROCTITLE 859 snprintf(proctitle, sizeof(proctitle), 860 "%s: anonymous/%.*s", remotehost, 861 (int) (sizeof(proctitle) - sizeof(remotehost) - 862 sizeof(": anonymous/")), passwd); 863 setproctitle(proctitle); 864 #endif /* HASSETPROCTITLE */ 865 if (logging) 866 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 867 remotehost, passwd); 868 } else { 869 reply(230, "User %s logged in.", pw->pw_name); 870 #ifdef HASSETPROCTITLE 871 snprintf(proctitle, sizeof(proctitle), 872 "%s: %s", remotehost, pw->pw_name); 873 setproctitle(proctitle); 874 #endif /* HASSETPROCTITLE */ 875 if (logging) 876 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 877 remotehost, pw->pw_name); 878 } 879 (void) umask(curclass.umask); 880 return; 881 bad: 882 /* Forget all about it... */ 883 end_login(); 884 } 885 886 void 887 retrieve(cmd, name) 888 const char *cmd, *name; 889 { 890 FILE *fin = NULL, *dout; 891 struct stat st; 892 int (*closefunc) __P((FILE *)) = NULL; 893 int log, sendrv, closerv, stderrfd, isconversion, isdata, isls; 894 struct timeval start, finish, td, *tdp; 895 char tline[BUFSIZ]; 896 const char *dispname; 897 898 sendrv = closerv = stderrfd = -1; 899 isconversion = isdata = isls = log = 0; 900 tdp = NULL; 901 dispname = name; 902 if (cmd == NULL) { 903 log = 1; 904 isdata = 1; 905 fin = fopen(name, "r"); 906 closefunc = fclose; 907 if (fin == NULL) 908 cmd = do_conversion(name); 909 if (cmd != NULL) { 910 isconversion++; 911 syslog(LOG_INFO, "get command: '%s'", cmd); 912 } 913 } 914 if (cmd != NULL) { 915 char temp[MAXPATHLEN + 1]; 916 917 if (strncmp(cmd, INTERNAL_LS, sizeof(INTERNAL_LS) - 1) == 0 && 918 strchr(" \t\n", cmd[sizeof(INTERNAL_LS) - 1]) != NULL) { 919 isls = 1; 920 stderrfd = -1; 921 } else { 922 (void)snprintf(temp, sizeof(temp), "%s", TMPFILE); 923 stderrfd = mkstemp(temp); 924 if (stderrfd != -1) 925 (void)unlink(temp); 926 } 927 (void)snprintf(tline, sizeof(tline), cmd, name); 928 dispname = tline; 929 fin = ftpd_popen(tline, "r", stderrfd); 930 closefunc = ftpd_pclose; 931 st.st_size = -1; 932 st.st_blksize = BUFSIZ; 933 } 934 if (fin == NULL) { 935 if (errno != 0) { 936 perror_reply(550, dispname); 937 if (log) 938 logcmd("get", -1, name, NULL, NULL, 939 strerror(errno)); 940 } 941 if (stderrfd != -1) 942 (void)close(stderrfd); 943 return; 944 } 945 byte_count = -1; 946 if (cmd == NULL 947 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 948 reply(550, "%s: not a plain file.", dispname); 949 goto done; 950 } 951 if (restart_point) { 952 if (type == TYPE_A) { 953 off_t i; 954 int c; 955 956 for (i = 0; i < restart_point; i++) { 957 if ((c=getc(fin)) == EOF) { 958 perror_reply(550, dispname); 959 goto done; 960 } 961 if (c == '\n') 962 i++; 963 } 964 } else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 965 perror_reply(550, dispname); 966 goto done; 967 } 968 } 969 dout = dataconn(dispname, st.st_size, "w"); 970 if (dout == NULL) 971 goto done; 972 973 (void)gettimeofday(&start, NULL); 974 sendrv = send_data(fin, dout, st.st_blksize, isdata); 975 (void)gettimeofday(&finish, NULL); 976 (void) fclose(dout); 977 timersub(&finish, &start, &td); 978 tdp = &td; 979 data = -1; 980 pdata = -1; 981 done: 982 if (log) 983 logcmd("get", byte_count, name, NULL, tdp, NULL); 984 closerv = (*closefunc)(fin); 985 if (sendrv == 0) { 986 FILE *err; 987 struct stat sb; 988 989 if (!isls && cmd != NULL && closerv != 0) { 990 lreply(226, 991 "Command returned an exit status of %d", 992 closerv); 993 if (isconversion) 994 syslog(LOG_INFO, 995 "get command: '%s' returned %d", 996 cmd, closerv); 997 } 998 if (!isls && cmd != NULL && stderrfd != -1 && 999 (fstat(stderrfd, &sb) == 0) && sb.st_size > 0 && 1000 ((err = fdopen(stderrfd, "r")) != NULL)) { 1001 char *cp, line[LINE_MAX]; 1002 1003 lreply(226, "Command error messages:"); 1004 rewind(err); 1005 while (fgets(line, sizeof(line), err) != NULL) { 1006 if ((cp = strchr(line, '\n')) != NULL) 1007 *cp = '\0'; 1008 lreply(0, " %s", line); 1009 } 1010 (void) fflush(stdout); 1011 (void) fclose(err); 1012 /* a reply(226,) must follow */ 1013 } 1014 reply(226, "Transfer complete."); 1015 } 1016 if (stderrfd != -1) 1017 (void)close(stderrfd); 1018 } 1019 1020 void 1021 store(name, mode, unique) 1022 const char *name, *mode; 1023 int unique; 1024 { 1025 FILE *fout, *din; 1026 struct stat st; 1027 int (*closefunc) __P((FILE *)); 1028 struct timeval start, finish, td, *tdp; 1029 char *desc; 1030 1031 desc = (*mode == 'w') ? "put" : "append"; 1032 if (unique && stat(name, &st) == 0 && 1033 (name = gunique(name)) == NULL) { 1034 logcmd(desc, -1, name, NULL, NULL, "cannot create unique file"); 1035 return; 1036 } 1037 1038 if (restart_point) 1039 mode = "r+"; 1040 fout = fopen(name, mode); 1041 closefunc = fclose; 1042 tdp = NULL; 1043 if (fout == NULL) { 1044 perror_reply(553, name); 1045 logcmd(desc, -1, name, NULL, NULL, strerror(errno)); 1046 return; 1047 } 1048 byte_count = -1; 1049 if (restart_point) { 1050 if (type == TYPE_A) { 1051 off_t i; 1052 int c; 1053 1054 for (i = 0; i < restart_point; i++) { 1055 if ((c=getc(fout)) == EOF) { 1056 perror_reply(550, name); 1057 goto done; 1058 } 1059 if (c == '\n') 1060 i++; 1061 } 1062 /* 1063 * We must do this seek to "current" position 1064 * because we are changing from reading to 1065 * writing. 1066 */ 1067 if (fseek(fout, 0L, SEEK_CUR) < 0) { 1068 perror_reply(550, name); 1069 goto done; 1070 } 1071 } else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1072 perror_reply(550, name); 1073 goto done; 1074 } 1075 } 1076 din = dataconn(name, (off_t)-1, "r"); 1077 if (din == NULL) 1078 goto done; 1079 (void)gettimeofday(&start, NULL); 1080 if (receive_data(din, fout) == 0) { 1081 if (unique) 1082 reply(226, "Transfer complete (unique file name:%s).", 1083 name); 1084 else 1085 reply(226, "Transfer complete."); 1086 } 1087 (void)gettimeofday(&finish, NULL); 1088 (void) fclose(din); 1089 timersub(&finish, &start, &td); 1090 tdp = &td; 1091 data = -1; 1092 pdata = -1; 1093 done: 1094 logcmd(desc, byte_count, name, NULL, tdp, NULL); 1095 (*closefunc)(fout); 1096 } 1097 1098 static FILE * 1099 getdatasock(mode) 1100 const char *mode; 1101 { 1102 int on = 1, s, t, tries; 1103 1104 if (data >= 0) 1105 return (fdopen(data, mode)); 1106 (void) seteuid((uid_t)0); 1107 s = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 1108 if (s < 0) 1109 goto bad; 1110 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 1111 (char *) &on, sizeof(on)) < 0) 1112 goto bad; 1113 if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1114 (char *) &on, sizeof(on)) < 0) 1115 goto bad; 1116 /* anchor socket to avoid multi-homing problems */ 1117 data_source = ctrl_addr; 1118 data_source.su_port = htons(20); /* ftp-data port */ 1119 for (tries = 1; ; tries++) { 1120 if (bind(s, (struct sockaddr *)&data_source, 1121 data_source.su_len) >= 0) 1122 break; 1123 if (errno != EADDRINUSE || tries > 10) 1124 goto bad; 1125 sleep(tries); 1126 } 1127 (void) seteuid((uid_t)pw->pw_uid); 1128 #ifdef IP_TOS 1129 if (ctrl_addr.su_family == AF_INET) { 1130 on = IPTOS_THROUGHPUT; 1131 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, 1132 sizeof(int)) < 0) 1133 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 1134 } 1135 #endif 1136 return (fdopen(s, mode)); 1137 bad: 1138 /* Return the real value of errno (close may change it) */ 1139 t = errno; 1140 (void) seteuid((uid_t)pw->pw_uid); 1141 (void) close(s); 1142 errno = t; 1143 return (NULL); 1144 } 1145 1146 static FILE * 1147 dataconn(name, size, mode) 1148 const char *name; 1149 off_t size; 1150 const char *mode; 1151 { 1152 char sizebuf[32]; 1153 FILE *file; 1154 int retry = 0, tos, keepalive; 1155 1156 file_size = size; 1157 byte_count = 0; 1158 if (size != (off_t) -1) 1159 (void)snprintf(sizebuf, sizeof(sizebuf), " (%qd byte%s)", 1160 (qdfmt_t)size, PLURAL(size)); 1161 else 1162 sizebuf[0] = '\0'; 1163 if (pdata >= 0) { 1164 union sockunion from; 1165 int s, fromlen = sizeof(from); 1166 1167 (void) alarm(curclass.timeout); 1168 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 1169 (void) alarm(0); 1170 if (s < 0) { 1171 reply(425, "Can't open data connection."); 1172 (void) close(pdata); 1173 pdata = -1; 1174 return (NULL); 1175 } 1176 (void) close(pdata); 1177 pdata = s; 1178 switch (from.su_family) { 1179 case AF_INET: 1180 #ifdef IP_TOS 1181 tos = IPTOS_THROUGHPUT; 1182 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 1183 sizeof(int)); 1184 break; 1185 #endif 1186 } 1187 /* Set keepalives on the socket to detect dropped conns. */ 1188 #ifdef SO_KEEPALIVE 1189 keepalive = 1; 1190 (void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1191 (char *)&keepalive, sizeof(int)); 1192 #endif 1193 reply(150, "Opening %s mode data connection for '%s'%s.", 1194 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1195 return (fdopen(pdata, mode)); 1196 } 1197 if (data >= 0) { 1198 reply(125, "Using existing data connection for '%s'%s.", 1199 name, sizebuf); 1200 usedefault = 1; 1201 return (fdopen(data, mode)); 1202 } 1203 if (usedefault) 1204 data_dest = his_addr; 1205 usedefault = 1; 1206 file = getdatasock(mode); 1207 if (file == NULL) { 1208 char hbuf[INET6_ADDRSTRLEN]; 1209 char pbuf[10]; 1210 getnameinfo((struct sockaddr *)&data_source, data_source.su_len, 1211 hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), 1212 NI_NUMERICHOST | NI_NUMERICSERV); 1213 reply(425, "Can't create data socket (%s,%s): %s.", 1214 hbuf, pbuf, strerror(errno)); 1215 return (NULL); 1216 } 1217 data = fileno(file); 1218 while (connect(data, (struct sockaddr *)&data_dest, 1219 data_dest.su_len) < 0) { 1220 if (errno == EADDRINUSE && retry < swaitmax) { 1221 sleep((unsigned) swaitint); 1222 retry += swaitint; 1223 continue; 1224 } 1225 perror_reply(425, "Can't build data connection"); 1226 (void) fclose(file); 1227 data = -1; 1228 return (NULL); 1229 } 1230 reply(150, "Opening %s mode data connection for '%s'%s.", 1231 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1232 return (file); 1233 } 1234 1235 /* 1236 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 1237 * encapsulation of the data subject * to Mode, Structure, and Type. 1238 * 1239 * NB: Form isn't handled. 1240 */ 1241 static int 1242 send_data(instr, outstr, blksize, isdata) 1243 FILE *instr, *outstr; 1244 off_t blksize; 1245 int isdata; 1246 { 1247 int c, cnt, filefd, netfd, rval; 1248 char *buf; 1249 1250 transflag = 1; 1251 rval = -1; 1252 buf = NULL; 1253 if (setjmp(urgcatch)) 1254 goto cleanup_send_data; 1255 1256 switch (type) { 1257 1258 case TYPE_A: 1259 (void) alarm(curclass.timeout); 1260 while ((c = getc(instr)) != EOF) { 1261 byte_count++; 1262 if (c == '\n') { 1263 if (ferror(outstr)) 1264 goto data_err; 1265 (void) putc('\r', outstr); 1266 if (isdata) { 1267 total_data_out++; 1268 total_data++; 1269 } 1270 total_bytes_out++; 1271 total_bytes++; 1272 } 1273 (void) putc(c, outstr); 1274 if (isdata) { 1275 total_data_out++; 1276 total_data++; 1277 } 1278 total_bytes_out++; 1279 total_bytes++; 1280 if ((byte_count % 4096) == 0) 1281 (void) alarm(curclass.timeout); 1282 } 1283 (void) alarm(0); 1284 fflush(outstr); 1285 if (ferror(instr)) 1286 goto file_err; 1287 if (ferror(outstr)) 1288 goto data_err; 1289 rval = 0; 1290 goto cleanup_send_data; 1291 1292 case TYPE_I: 1293 case TYPE_L: 1294 if ((buf = malloc((size_t)blksize)) == NULL) { 1295 perror_reply(451, "Local resource failure: malloc"); 1296 goto cleanup_send_data; 1297 } 1298 filefd = fileno(instr); 1299 netfd = fileno(outstr); 1300 (void) alarm(curclass.timeout); 1301 while ((cnt = read(filefd, buf, (size_t)blksize)) > 0) { 1302 if (write(netfd, buf, cnt) != cnt) 1303 goto data_err; 1304 (void) alarm(curclass.timeout); 1305 byte_count += cnt; 1306 if (isdata) { 1307 total_data_out += cnt; 1308 total_data += cnt; 1309 } 1310 total_bytes_out += cnt; 1311 total_bytes += cnt; 1312 } 1313 if (cnt < 0) 1314 goto file_err; 1315 rval = 0; 1316 goto cleanup_send_data; 1317 1318 default: 1319 reply(550, "Unimplemented TYPE %d in send_data", type); 1320 goto cleanup_send_data; 1321 } 1322 1323 data_err: 1324 (void) alarm(0); 1325 perror_reply(426, "Data connection"); 1326 goto cleanup_send_data; 1327 1328 file_err: 1329 (void) alarm(0); 1330 perror_reply(551, "Error on input file"); 1331 /* FALLTHROUGH */ 1332 1333 cleanup_send_data: 1334 (void) alarm(0); 1335 transflag = 0; 1336 if (buf) 1337 free(buf); 1338 if (isdata) { 1339 total_files_out++; 1340 total_files++; 1341 } 1342 total_xfers_out++; 1343 total_xfers++; 1344 return (rval); 1345 } 1346 1347 /* 1348 * Transfer data from peer to "outstr" using the appropriate encapulation of 1349 * the data subject to Mode, Structure, and Type. 1350 * 1351 * N.B.: Form isn't handled. 1352 */ 1353 static int 1354 receive_data(instr, outstr) 1355 FILE *instr, *outstr; 1356 { 1357 int c, cnt, bare_lfs, netfd, filefd, rval; 1358 char buf[BUFSIZ]; 1359 #ifdef __GNUC__ 1360 (void) &bare_lfs; 1361 #endif 1362 1363 bare_lfs = 0; 1364 transflag = 1; 1365 rval = -1; 1366 if (setjmp(urgcatch)) 1367 goto cleanup_recv_data; 1368 1369 switch (type) { 1370 1371 case TYPE_I: 1372 case TYPE_L: 1373 netfd = fileno(instr); 1374 filefd = fileno(outstr); 1375 (void) alarm(curclass.timeout); 1376 while ((cnt = read(netfd, buf, sizeof(buf))) > 0) { 1377 if (write(filefd, buf, cnt) != cnt) 1378 goto file_err; 1379 (void) alarm(curclass.timeout); 1380 byte_count += cnt; 1381 total_data_in += cnt; 1382 total_data += cnt; 1383 total_bytes_in += cnt; 1384 total_bytes += cnt; 1385 } 1386 if (cnt < 0) 1387 goto data_err; 1388 rval = 0; 1389 goto cleanup_recv_data; 1390 1391 case TYPE_E: 1392 reply(553, "TYPE E not implemented."); 1393 goto cleanup_recv_data; 1394 1395 case TYPE_A: 1396 (void) alarm(curclass.timeout); 1397 while ((c = getc(instr)) != EOF) { 1398 byte_count++; 1399 total_data_in++; 1400 total_data++; 1401 total_bytes_in++; 1402 total_bytes++; 1403 if ((byte_count % 4096) == 0) 1404 (void) alarm(curclass.timeout); 1405 if (c == '\n') 1406 bare_lfs++; 1407 while (c == '\r') { 1408 if (ferror(outstr)) 1409 goto data_err; 1410 if ((c = getc(instr)) != '\n') { 1411 byte_count++; 1412 total_data_in++; 1413 total_data++; 1414 total_bytes_in++; 1415 total_bytes++; 1416 if ((byte_count % 4096) == 0) 1417 (void) alarm(curclass.timeout); 1418 (void) putc ('\r', outstr); 1419 if (c == '\0' || c == EOF) 1420 goto contin2; 1421 } 1422 } 1423 (void) putc(c, outstr); 1424 contin2: ; 1425 } 1426 (void) alarm(0); 1427 fflush(outstr); 1428 if (ferror(instr)) 1429 goto data_err; 1430 if (ferror(outstr)) 1431 goto file_err; 1432 if (bare_lfs) { 1433 lreply(226, 1434 "WARNING! %d bare linefeeds received in ASCII mode", 1435 bare_lfs); 1436 lreply(0, "File may not have transferred correctly."); 1437 } 1438 rval = 0; 1439 goto cleanup_recv_data; 1440 1441 default: 1442 reply(550, "Unimplemented TYPE %d in receive_data", type); 1443 goto cleanup_recv_data; 1444 } 1445 1446 data_err: 1447 (void) alarm(0); 1448 perror_reply(426, "Data Connection"); 1449 goto cleanup_recv_data; 1450 1451 file_err: 1452 (void) alarm(0); 1453 perror_reply(452, "Error writing file"); 1454 goto cleanup_recv_data; 1455 1456 cleanup_recv_data: 1457 (void) alarm(0); 1458 transflag = 0; 1459 total_files_in++; 1460 total_files++; 1461 total_xfers_in++; 1462 total_xfers++; 1463 return (rval); 1464 } 1465 1466 void 1467 statfilecmd(filename) 1468 const char *filename; 1469 { 1470 FILE *fin; 1471 int c; 1472 char line[LINE_MAX]; 1473 1474 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1475 fin = ftpd_popen(line, "r", STDOUT_FILENO); 1476 lreply(211, "status of %s:", filename); 1477 while ((c = getc(fin)) != EOF) { 1478 if (c == '\n') { 1479 if (ferror(stdout)){ 1480 perror_reply(421, "control connection"); 1481 (void) ftpd_pclose(fin); 1482 dologout(1); 1483 /* NOTREACHED */ 1484 } 1485 if (ferror(fin)) { 1486 perror_reply(551, filename); 1487 (void) ftpd_pclose(fin); 1488 return; 1489 } 1490 (void) putc('\r', stdout); 1491 total_bytes++; 1492 total_bytes_out++; 1493 } 1494 (void) putc(c, stdout); 1495 total_bytes++; 1496 total_bytes_out++; 1497 } 1498 (void) ftpd_pclose(fin); 1499 reply(211, "End of Status"); 1500 } 1501 1502 void 1503 statcmd() 1504 { 1505 union sockunion *su = NULL; 1506 static char ntop_buf[INET6_ADDRSTRLEN]; 1507 u_char *a, *p; 1508 int ispassive; 1509 off_t b, otbi, otbo, otb; 1510 1511 a = p = (u_char *)NULL; 1512 1513 lreply(211, "%s FTP server status:", hostname); 1514 lreply(0, "%s", version); 1515 ntop_buf[0] = '\0'; 1516 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len, 1517 ntop_buf, sizeof(ntop_buf), NULL, 0, NI_NUMERICHOST) 1518 && strcmp(remotehost, ntop_buf) != 0) { 1519 lreply(0, "Connected to %s (%s)", remotehost, ntop_buf); 1520 } else 1521 lreply(0, "Connected to %s", remotehost); 1522 if (logged_in) { 1523 if (guest) 1524 lreply(0, "Logged in anonymously"); 1525 else 1526 lreply(0, "Logged in as %s", pw->pw_name); 1527 } else if (askpasswd) 1528 lreply(0, "Waiting for password"); 1529 else 1530 lreply(0, "Waiting for user name"); 1531 b = printf(" TYPE: %s", typenames[type]); 1532 total_bytes += b; 1533 total_bytes_out += b; 1534 if (type == TYPE_A || type == TYPE_E) { 1535 b = printf(", FORM: %s", formnames[form]); 1536 total_bytes += b; 1537 total_bytes_out += b; 1538 } 1539 if (type == TYPE_L) { 1540 #if NBBY == 8 1541 b = printf(" %d", NBBY); 1542 #else 1543 /* XXX: `bytesize' needs to be defined in this case */ 1544 b = printf(" %d", bytesize); 1545 #endif 1546 total_bytes += b; 1547 total_bytes_out += b; 1548 } 1549 b = printf("; STRUcture: %s; transfer MODE: %s\r\n", 1550 strunames[stru], modenames[mode]); 1551 total_bytes += b; 1552 total_bytes_out += b; 1553 ispassive = 0; 1554 if (data != -1) { 1555 lreply(0, "Data connection open"); 1556 su = NULL; 1557 } else if (pdata != -1) { 1558 b = printf(" in Passive mode"); 1559 total_bytes += b; 1560 total_bytes_out += b; 1561 su = (union sockunion *)&pasv_addr; 1562 ispassive = 1; 1563 goto printaddr; 1564 } else if (usedefault == 0) { 1565 if (epsvall) { 1566 b = printf("211- EPSV only mode (EPSV ALL )\r\n"); 1567 total_bytes += b; 1568 total_bytes_out += b; 1569 goto epsvonly; 1570 } 1571 b = printf("211- %s", 1572 (data_dest.su_family == AF_INET) ? "PORT" : "LPRT"); 1573 total_bytes += b; 1574 total_bytes_out += b; 1575 su = (union sockunion *)&data_dest; 1576 printaddr: 1577 /* PASV/PORT */ 1578 if (su->su_family == AF_INET) { 1579 if (ispassive) 1580 b = printf("211- PASV "); 1581 else 1582 b = printf("211- PORT "); 1583 a = (u_char *) &su->su_sin.sin_addr; 1584 p = (u_char *) &su->su_sin.sin_port; 1585 #define UC(b) (((int) b) & 0xff) 1586 b += printf("(%d,%d,%d,%d,%d,%d)\r\n", 1587 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1588 UC(p[0]), UC(p[1])); 1589 total_bytes += b; 1590 total_bytes_out += b; 1591 } 1592 1593 /* LPSV/LPRT */ 1594 { 1595 int alen, af, i; 1596 1597 alen = 0; 1598 switch (su->su_family) { 1599 case AF_INET: 1600 a = (u_char *) &su->su_sin.sin_addr; 1601 p = (u_char *) &su->su_sin.sin_port; 1602 alen = sizeof(su->su_sin.sin_addr); 1603 af = 4; 1604 break; 1605 case AF_INET6: 1606 a = (u_char *) &su->su_sin6.sin6_addr; 1607 p = (u_char *) &su->su_sin6.sin6_port; 1608 alen = sizeof(su->su_sin6.sin6_addr); 1609 af = 6; 1610 break; 1611 default: 1612 af = 0; 1613 break; 1614 } 1615 if (af) { 1616 if (ispassive) 1617 b = printf("211- LPSV "); 1618 else 1619 b = printf("211- LPRT "); 1620 printf("(%d,%d", af, alen); 1621 for (i = 0; i < alen; i++) 1622 b += printf("%d,", UC(a[alen])); 1623 b += printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1])); 1624 total_bytes += b; 1625 total_bytes_out += b; 1626 #undef UC 1627 } 1628 } 1629 1630 /* EPRT/EPSV */ 1631 epsvonly:; 1632 { 1633 int af; 1634 1635 switch (su->su_family) { 1636 case AF_INET: 1637 af = 1; 1638 break; 1639 case AF_INET6: 1640 af = 2; 1641 break; 1642 default: 1643 af = 0; 1644 break; 1645 } 1646 if (af) { 1647 if (getnameinfo((struct sockaddr *)su, su->su_len, 1648 ntop_buf, sizeof(ntop_buf), NULL, 0, 1649 NI_NUMERICHOST) == 0) { 1650 if (ispassive) 1651 b = printf("211 - EPSV "); 1652 else 1653 b = printf("211 - EPRT "); 1654 b += printf("(|%d|%s|%d|)\r\n", 1655 af, ntop_buf, ntohs(su->su_port)); 1656 total_bytes += b; 1657 total_bytes_out += b; 1658 } 1659 } 1660 } 1661 } else 1662 lreply(0, "No data connection"); 1663 1664 if (logged_in) { 1665 lreply(0, "Data sent: %qd byte%s in %qd file%s", 1666 (qdfmt_t)total_data_out, PLURAL(total_data_out), 1667 (qdfmt_t)total_files_out, PLURAL(total_files_out)); 1668 lreply(0, "Data received: %qd byte%s in %qd file%s", 1669 (qdfmt_t)total_data_in, PLURAL(total_data_in), 1670 (qdfmt_t)total_files_in, PLURAL(total_files_in)); 1671 lreply(0, "Total data: %qd byte%s in %qd file%s", 1672 (qdfmt_t)total_data, PLURAL(total_data), 1673 (qdfmt_t)total_files, PLURAL(total_files)); 1674 } 1675 otbi = total_bytes_in; 1676 otbo = total_bytes_out; 1677 otb = total_bytes; 1678 lreply(0, "Traffic sent: %qd byte%s in %qd transfer%s", 1679 (qdfmt_t)otbo, PLURAL(otbo), 1680 (qdfmt_t)total_xfers_out, PLURAL(total_xfers_out)); 1681 lreply(0, "Traffic received: %qd byte%s in %qd transfer%s", 1682 (qdfmt_t)otbi, PLURAL(otbi), 1683 (qdfmt_t)total_xfers_in, PLURAL(total_xfers_in)); 1684 lreply(0, "Total traffic: %qd byte%s in %qd transfer%s", 1685 (qdfmt_t)otb, PLURAL(otb), 1686 (qdfmt_t)total_xfers, PLURAL(total_xfers)); 1687 1688 if (logged_in) { 1689 struct ftpconv *cp; 1690 1691 lreply(0, ""); 1692 lreply(0, "Class: %s", curclass.classname); 1693 lreply(0, "Check PORT/LPRT commands: %sabled", 1694 curclass.checkportcmd ? "en" : "dis"); 1695 if (curclass.display) 1696 lreply(0, "Display file: %s", curclass.display); 1697 if (curclass.notify) 1698 lreply(0, "Notify fileglob: %s", curclass.notify); 1699 lreply(0, "Idle timeout: %d, maximum timeout: %d", 1700 curclass.timeout, curclass.maxtimeout); 1701 lreply(0, "DELE, MKD, RMD, UMASK, CHMOD commands: %sabled", 1702 curclass.modify ? "en" : "dis"); 1703 lreply(0, "Umask: %.04o", curclass.umask); 1704 for (cp = curclass.conversions; cp != NULL; cp=cp->next) { 1705 if (cp->suffix == NULL || cp->types == NULL || 1706 cp->command == NULL) 1707 continue; 1708 lreply(0, 1709 "Conversion: %s [%s] disable: %s, command: %s", 1710 cp->suffix, cp->types, cp->disable, cp->command); 1711 } 1712 } 1713 1714 reply(211, "End of status"); 1715 } 1716 1717 void 1718 fatal(s) 1719 const char *s; 1720 { 1721 1722 reply(451, "Error in server: %s\n", s); 1723 reply(221, "Closing connection due to server error."); 1724 dologout(0); 1725 /* NOTREACHED */ 1726 } 1727 1728 void 1729 #ifdef __STDC__ 1730 reply(int n, const char *fmt, ...) 1731 #else 1732 reply(n, fmt, va_alist) 1733 int n; 1734 char *fmt; 1735 va_dcl 1736 #endif 1737 { 1738 off_t b; 1739 va_list ap; 1740 #ifdef __STDC__ 1741 va_start(ap, fmt); 1742 #else 1743 va_start(ap); 1744 #endif 1745 b = 0; 1746 b += printf("%d ", n); 1747 b += vprintf(fmt, ap); 1748 b += printf("\r\n"); 1749 total_bytes += b; 1750 total_bytes_out += b; 1751 (void)fflush(stdout); 1752 if (debug) { 1753 syslog(LOG_DEBUG, "<--- %d ", n); 1754 vsyslog(LOG_DEBUG, fmt, ap); 1755 } 1756 } 1757 1758 void 1759 #ifdef __STDC__ 1760 lreply(int n, const char *fmt, ...) 1761 #else 1762 lreply(n, fmt, va_alist) 1763 int n; 1764 char *fmt; 1765 va_dcl 1766 #endif 1767 { 1768 off_t b; 1769 va_list ap; 1770 #ifdef __STDC__ 1771 va_start(ap, fmt); 1772 #else 1773 va_start(ap); 1774 #endif 1775 b = 0; 1776 switch (n) { 1777 case 0: 1778 b += printf(" "); 1779 case -1: 1780 break; 1781 default: 1782 b += printf("%d-", n); 1783 break; 1784 } 1785 b += vprintf(fmt, ap); 1786 b += printf("\r\n"); 1787 total_bytes += b; 1788 total_bytes_out += b; 1789 (void)fflush(stdout); 1790 if (debug) { 1791 syslog(LOG_DEBUG, "<--- %d- ", n); 1792 vsyslog(LOG_DEBUG, fmt, ap); 1793 } 1794 } 1795 1796 static void 1797 ack(s) 1798 const char *s; 1799 { 1800 1801 reply(250, "%s command successful.", s); 1802 } 1803 1804 void 1805 delete(name) 1806 const char *name; 1807 { 1808 char *p = NULL; 1809 1810 if (remove(name) < 0) { 1811 p = strerror(errno); 1812 perror_reply(550, name); 1813 } else 1814 ack("DELE"); 1815 logcmd("delete", -1, name, NULL, NULL, p); 1816 } 1817 1818 void 1819 cwd(path) 1820 const char *path; 1821 { 1822 1823 if (chdir(path) < 0) 1824 perror_reply(550, path); 1825 else { 1826 show_chdir_messages(250); 1827 ack("CWD"); 1828 } 1829 } 1830 1831 static void 1832 replydirname(name, message) 1833 const char *name, *message; 1834 { 1835 char npath[MAXPATHLEN + 1]; 1836 int i; 1837 1838 for (i = 0; *name != '\0' && i < sizeof(npath) - 1; i++, name++) { 1839 npath[i] = *name; 1840 if (*name == '"') 1841 npath[++i] = '"'; 1842 } 1843 npath[i] = '\0'; 1844 reply(257, "\"%s\" %s", npath, message); 1845 } 1846 1847 void 1848 makedir(name) 1849 const char *name; 1850 { 1851 char *p = NULL; 1852 1853 if (mkdir(name, 0777) < 0) { 1854 p = strerror(errno); 1855 perror_reply(550, name); 1856 } else 1857 replydirname(name, "directory created."); 1858 logcmd("mkdir", -1, name, NULL, NULL, p); 1859 } 1860 1861 void 1862 removedir(name) 1863 const char *name; 1864 { 1865 char *p = NULL; 1866 1867 if (rmdir(name) < 0) { 1868 p = strerror(errno); 1869 perror_reply(550, name); 1870 } else 1871 ack("RMD"); 1872 logcmd("rmdir", -1, name, NULL, NULL, p); 1873 } 1874 1875 void 1876 pwd() 1877 { 1878 char path[MAXPATHLEN + 1]; 1879 1880 if (getcwd(path, sizeof(path) - 1) == NULL) 1881 reply(550, "Can't get the current directory: %s.", 1882 strerror(errno)); 1883 else 1884 replydirname(path, "is the current directory."); 1885 } 1886 1887 char * 1888 renamefrom(name) 1889 char *name; 1890 { 1891 struct stat st; 1892 1893 if (stat(name, &st) < 0) { 1894 perror_reply(550, name); 1895 return (NULL); 1896 } 1897 reply(350, "File exists, ready for destination name"); 1898 return (name); 1899 } 1900 1901 void 1902 renamecmd(from, to) 1903 const char *from, *to; 1904 { 1905 char *p = NULL; 1906 1907 if (rename(from, to) < 0) { 1908 p = strerror(errno); 1909 perror_reply(550, "rename"); 1910 } else 1911 ack("RNTO"); 1912 logcmd("rename", -1, from, to, NULL, p); 1913 } 1914 1915 static void 1916 dolog(who) 1917 struct sockaddr *who; 1918 { 1919 int error; 1920 error = getnameinfo(who, who->sa_len, remotehost, sizeof(remotehost), 1921 NULL, 0, 0); 1922 #ifdef HASSETPROCTITLE 1923 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1924 setproctitle(proctitle); 1925 #endif /* HASSETPROCTITLE */ 1926 1927 if (logging) 1928 syslog(LOG_INFO, "connection from %s", remotehost); 1929 } 1930 1931 /* 1932 * Record logout in wtmp file 1933 * and exit with supplied status. 1934 */ 1935 void 1936 dologout(status) 1937 int status; 1938 { 1939 /* 1940 * Prevent reception of SIGURG from resulting in a resumption 1941 * back to the main program loop. 1942 */ 1943 transflag = 0; 1944 1945 if (logged_in) { 1946 (void) seteuid((uid_t)0); 1947 logwtmp(ttyline, "", ""); 1948 #ifdef KERBEROS 1949 if (!notickets && krbtkfile_env) 1950 unlink(krbtkfile_env); 1951 #endif 1952 } 1953 /* beware of flushing buffers after a SIGPIPE */ 1954 _exit(status); 1955 } 1956 1957 static void 1958 myoob(signo) 1959 int signo; 1960 { 1961 char *cp; 1962 1963 /* only process if transfer occurring */ 1964 if (!transflag) 1965 return; 1966 cp = tmpline; 1967 if (getline(cp, 7, stdin) == NULL) { 1968 reply(221, "You could at least say goodbye."); 1969 dologout(0); 1970 } 1971 if (strcasecmp(cp, "ABOR\r\n") == 0) { 1972 tmpline[0] = '\0'; 1973 reply(426, "Transfer aborted. Data connection closed."); 1974 reply(226, "Abort successful"); 1975 longjmp(urgcatch, 1); 1976 } 1977 if (strcasecmp(cp, "STAT\r\n") == 0) { 1978 if (file_size != (off_t) -1) 1979 reply(213, "Status: %qd of %qd byte%s transferred", 1980 (qdfmt_t)byte_count, (qdfmt_t)file_size, 1981 PLURAL(byte_count)); 1982 else 1983 reply(213, "Status: %qd byte%s transferred", 1984 (qdfmt_t)byte_count, PLURAL(byte_count)); 1985 } 1986 } 1987 1988 /* 1989 * Note: a response of 425 is not mentioned as a possible response to 1990 * the PASV command in RFC959. However, it has been blessed as 1991 * a legitimate response by Jon Postel in a telephone conversation 1992 * with Rick Adams on 25 Jan 89. 1993 */ 1994 void 1995 passive() 1996 { 1997 int len; 1998 char *p, *a; 1999 2000 pdata = socket(AF_INET, SOCK_STREAM, 0); 2001 if (pdata < 0 || !logged_in) { 2002 perror_reply(425, "Can't open passive connection"); 2003 return; 2004 } 2005 pasv_addr = ctrl_addr; 2006 pasv_addr.su_port = 0; 2007 len = pasv_addr.su_len; 2008 (void) seteuid((uid_t)0); 2009 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0) { 2010 (void) seteuid((uid_t)pw->pw_uid); 2011 goto pasv_error; 2012 } 2013 (void) seteuid((uid_t)pw->pw_uid); 2014 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2015 goto pasv_error; 2016 if (listen(pdata, 1) < 0) 2017 goto pasv_error; 2018 a = (char *) &pasv_addr.su_sin.sin_addr; 2019 p = (char *) &pasv_addr.su_port; 2020 2021 #define UC(b) (((int) b) & 0xff) 2022 2023 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 2024 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 2025 return; 2026 2027 pasv_error: 2028 (void) seteuid((uid_t)pw->pw_uid); 2029 (void) close(pdata); 2030 pdata = -1; 2031 perror_reply(425, "Can't open passive connection"); 2032 return; 2033 } 2034 2035 /* 2036 * 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...) 2037 * 229 Entering Extended Passive Mode (|||port|) 2038 */ 2039 void 2040 long_passive(char *cmd, int pf) 2041 { 2042 int len; 2043 register char *p, *a; 2044 2045 if (!logged_in) { 2046 syslog(LOG_NOTICE, "long passive but not logged in"); 2047 reply(503, "Login with USER first."); 2048 return; 2049 } 2050 2051 if (pf != PF_UNSPEC) { 2052 if (ctrl_addr.su_family != pf) { 2053 switch (ctrl_addr.su_family) { 2054 case AF_INET: 2055 pf = 1; 2056 break; 2057 case AF_INET6: 2058 pf = 2; 2059 break; 2060 default: 2061 pf = 0; 2062 break; 2063 } 2064 /* 2065 * XXX 2066 * only EPRT/EPSV ready clients will understand this 2067 */ 2068 if (strcmp(cmd, "EPSV") == 0 && pf) { 2069 reply(522, "Network protocol mismatch, " 2070 "use (%d)", pf); 2071 } else 2072 reply(501, "Network protocol mismatch"); /*XXX*/ 2073 2074 return; 2075 } 2076 } 2077 2078 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 2079 if (pdata < 0) { 2080 perror_reply(425, "Can't open passive connection"); 2081 return; 2082 } 2083 pasv_addr = ctrl_addr; 2084 pasv_addr.su_port = 0; 2085 (void) seteuid((uid_t) 0); 2086 if (bind(pdata, (struct sockaddr *) &pasv_addr, pasv_addr.su_len) < 0) { 2087 (void) seteuid((uid_t) pw->pw_uid); 2088 goto pasv_error; 2089 } 2090 (void) seteuid((uid_t) pw->pw_uid); 2091 len = pasv_addr.su_len; 2092 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2093 goto pasv_error; 2094 if (listen(pdata, 1) < 0) 2095 goto pasv_error; 2096 p = (char *) &pasv_addr.su_port; 2097 2098 #define UC(b) (((int) b) & 0xff) 2099 2100 if (strcmp(cmd, "LPSV") == 0) { 2101 switch (pasv_addr.su_family) { 2102 case AF_INET: 2103 a = (char *) &pasv_addr.su_sin.sin_addr; 2104 reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)", 2105 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2106 2, UC(p[0]), UC(p[1])); 2107 return; 2108 case AF_INET6: 2109 a = (char *) &pasv_addr.su_sin6.sin6_addr; 2110 reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)", 2111 6, 16, 2112 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2113 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]), 2114 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]), 2115 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]), 2116 2, UC(p[0]), UC(p[1])); 2117 return; 2118 } 2119 #undef UC 2120 } else if (strcmp(cmd, "EPSV") == 0) { 2121 switch (pasv_addr.su_family) { 2122 case AF_INET: 2123 case AF_INET6: 2124 reply(229, "Entering Extended Passive Mode (|||%d|)", 2125 ntohs(pasv_addr.su_port)); 2126 return; 2127 } 2128 } else { 2129 /* more proper error code? */ 2130 } 2131 2132 pasv_error: 2133 (void) close(pdata); 2134 pdata = -1; 2135 perror_reply(425, "Can't open passive connection"); 2136 return; 2137 } 2138 2139 /* 2140 * Generate unique name for file with basename "local". 2141 * The file named "local" is already known to exist. 2142 * Generates failure reply on error. 2143 * 2144 * XXX this function should under go changes similar to 2145 * the mktemp(3)/mkstemp(3) changes. 2146 */ 2147 static char * 2148 gunique(local) 2149 const char *local; 2150 { 2151 static char new[MAXPATHLEN + 1]; 2152 struct stat st; 2153 int count, len; 2154 char *cp; 2155 2156 cp = strrchr(local, '/'); 2157 if (cp) 2158 *cp = '\0'; 2159 if (stat(cp ? local : ".", &st) < 0) { 2160 perror_reply(553, cp ? local : "."); 2161 return (NULL); 2162 } 2163 if (cp) 2164 *cp = '/'; 2165 (void) strcpy(new, local); 2166 len = strlen(new); 2167 cp = new + len; 2168 *cp++ = '.'; 2169 for (count = 1; count < 100; count++) { 2170 (void)snprintf(cp, sizeof(new) - len - 2, "%d", count); 2171 if (stat(new, &st) < 0) 2172 return (new); 2173 } 2174 reply(452, "Unique file name cannot be created."); 2175 return (NULL); 2176 } 2177 2178 /* 2179 * Format and send reply containing system error number. 2180 */ 2181 void 2182 perror_reply(code, string) 2183 int code; 2184 const char *string; 2185 { 2186 int save_errno; 2187 2188 save_errno = errno; 2189 reply(code, "%s: %s.", string, strerror(errno)); 2190 errno = save_errno; 2191 } 2192 2193 static char *onefile[] = { 2194 "", 2195 0 2196 }; 2197 2198 void 2199 send_file_list(whichf) 2200 const char *whichf; 2201 { 2202 struct stat st; 2203 DIR *dirp = NULL; 2204 struct dirent *dir; 2205 FILE *dout = NULL; 2206 char **dirlist, *dirname, *p; 2207 int simple = 0; 2208 int freeglob = 0; 2209 glob_t gl; 2210 off_t b; 2211 2212 #ifdef __GNUC__ 2213 (void) &dout; 2214 (void) &dirlist; 2215 (void) &simple; 2216 (void) &freeglob; 2217 #endif 2218 2219 p = NULL; 2220 if (strpbrk(whichf, "~{[*?") != NULL) { 2221 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 2222 2223 memset(&gl, 0, sizeof(gl)); 2224 freeglob = 1; 2225 if (glob(whichf, flags, 0, &gl)) { 2226 reply(550, "not found"); 2227 goto out; 2228 } else if (gl.gl_pathc == 0) { 2229 errno = ENOENT; 2230 perror_reply(550, whichf); 2231 goto out; 2232 } 2233 dirlist = gl.gl_pathv; 2234 } else { 2235 p = xstrdup(whichf); 2236 onefile[0] = p; 2237 dirlist = onefile; 2238 simple = 1; 2239 } 2240 /* XXX: } for vi sm */ 2241 2242 if (setjmp(urgcatch)) { 2243 transflag = 0; 2244 goto out; 2245 } 2246 while ((dirname = *dirlist++) != NULL) { 2247 int trailingslash = 0; 2248 2249 if (stat(dirname, &st) < 0) { 2250 /* 2251 * If user typed "ls -l", etc, and the client 2252 * used NLST, do what the user meant. 2253 */ 2254 if (dirname[0] == '-' && *dirlist == NULL && 2255 transflag == 0) { 2256 retrieve("/bin/ls %s", dirname); 2257 goto out; 2258 } 2259 perror_reply(550, whichf); 2260 if (dout != NULL) { 2261 (void) fclose(dout); 2262 transflag = 0; 2263 data = -1; 2264 pdata = -1; 2265 } 2266 goto out; 2267 } 2268 2269 if (S_ISREG(st.st_mode)) { 2270 if (dout == NULL) { 2271 dout = dataconn("file list", (off_t)-1, "w"); 2272 if (dout == NULL) 2273 goto out; 2274 transflag++; 2275 } 2276 b = fprintf(dout, "%s%s\n", dirname, 2277 type == TYPE_A ? "\r" : ""); 2278 total_bytes += b; 2279 total_bytes_out += b; 2280 byte_count += strlen(dirname) + 1; 2281 continue; 2282 } else if (!S_ISDIR(st.st_mode)) 2283 continue; 2284 2285 if (dirname[strlen(dirname) - 1] == '/') 2286 trailingslash++; 2287 2288 if ((dirp = opendir(dirname)) == NULL) 2289 continue; 2290 2291 while ((dir = readdir(dirp)) != NULL) { 2292 char nbuf[MAXPATHLEN + 1]; 2293 2294 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 2295 continue; 2296 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 2297 dir->d_namlen == 2) 2298 continue; 2299 2300 (void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname, 2301 trailingslash ? "" : "/", dir->d_name); 2302 2303 /* 2304 * We have to do a stat to ensure it's 2305 * not a directory or special file. 2306 */ 2307 if (simple || (stat(nbuf, &st) == 0 && 2308 S_ISREG(st.st_mode))) { 2309 char *p; 2310 2311 if (dout == NULL) { 2312 dout = dataconn("file list", (off_t)-1, 2313 "w"); 2314 if (dout == NULL) 2315 goto out; 2316 transflag++; 2317 } 2318 p = nbuf; 2319 if (nbuf[0] == '.' && nbuf[1] == '/') 2320 p = &nbuf[2]; 2321 b = fprintf(dout, "%s%s\n", p, 2322 type == TYPE_A ? "\r" : ""); 2323 total_bytes += b; 2324 total_bytes_out += b; 2325 byte_count += strlen(nbuf) + 1; 2326 } 2327 } 2328 (void) closedir(dirp); 2329 } 2330 2331 if (dout == NULL) 2332 reply(550, "No files found."); 2333 else if (ferror(dout) != 0) 2334 perror_reply(550, "Data connection"); 2335 else 2336 reply(226, "Transfer complete."); 2337 2338 transflag = 0; 2339 if (dout != NULL) 2340 (void) fclose(dout); 2341 data = -1; 2342 pdata = -1; 2343 out: 2344 total_xfers++; 2345 total_xfers_out++; 2346 if (p) 2347 free(p); 2348 if (freeglob) 2349 globfree(&gl); 2350 } 2351 2352 char * 2353 conffilename(s) 2354 const char *s; 2355 { 2356 static char filename[MAXPATHLEN + 1]; 2357 2358 (void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s); 2359 return filename; 2360 } 2361 2362 /* 2363 * logcmd -- 2364 * based on the arguments, syslog a message: 2365 * if bytes != -1 "<command> <file1> = <bytes> bytes" 2366 * else if file2 != NULL "<command> <file1> <file2>" 2367 * else "<command> <file1>" 2368 * if elapsed != NULL, append "in xxx.yyy seconds" 2369 * if error != NULL, append ": " + error 2370 */ 2371 2372 void 2373 logcmd(command, bytes, file1, file2, elapsed, error) 2374 const char *command; 2375 off_t bytes; 2376 const char *file1; 2377 const char *file2; 2378 const struct timeval *elapsed; 2379 const char *error; 2380 { 2381 char buf[MAXPATHLEN + 100], realfile[MAXPATHLEN + 1]; 2382 const char *p; 2383 size_t len; 2384 2385 if (logging <=1) 2386 return; 2387 2388 if ((p = realpath(file1, realfile)) == NULL) { 2389 #if 0 /* XXX: too noisy */ 2390 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2391 realfile, strerror(errno)); 2392 #endif 2393 p = file1; 2394 } 2395 len = snprintf(buf, sizeof(buf), "%s %s", command, p); 2396 2397 if (bytes != (off_t)-1) { 2398 len += snprintf(buf + len, sizeof(buf) - len, 2399 " = %qd byte%s", (qdfmt_t) bytes, PLURAL(bytes)); 2400 } else if (file2 != NULL) { 2401 if ((p = realpath(file2, realfile)) == NULL) { 2402 #if 0 /* XXX: too noisy */ 2403 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2404 realfile, strerror(errno)); 2405 #endif 2406 p = file2; 2407 } 2408 len += snprintf(buf + len, sizeof(buf) - len, " %s", p); 2409 } 2410 2411 if (elapsed != NULL) { 2412 len += snprintf(buf + len, sizeof(buf) - len, 2413 " in %ld.%.03d seconds", elapsed->tv_sec, 2414 (int)(elapsed->tv_usec / 1000)); 2415 } 2416 2417 if (error != NULL) 2418 len += snprintf(buf + len, sizeof(buf) - len, ": %s", error); 2419 2420 syslog(LOG_INFO, "%s", buf); 2421 } 2422 2423 char * 2424 xstrdup(s) 2425 const char *s; 2426 { 2427 char *new = strdup(s); 2428 2429 if (new == NULL) 2430 fatal("Local resource failure: malloc"); 2431 /* NOTREACHED */ 2432 return (new); 2433 } 2434
Indexes created Tue Sep 23 14:10:03 GMT 2025