ftpd.c revision 1.70
1 /* $NetBSD: ftpd.c,v 1.70 1999/09/30 18:12:34 tron 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 1.70 1999/09/30 18:12:34 tron 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 <kerberosIV/com_err.h> 157 #include <krb5/krb5.h> 158 #endif 159 160 #include "extern.h" 161 #include "pathnames.h" 162 163 #if __STDC__ 164 #include <stdarg.h> 165 #else 166 #include <varargs.h> 167 #endif 168 169 #ifndef TRUE 170 #define TRUE 1 171 #define FALSE 0 172 #endif 173 174 const char version[] = "Version: 7.2.0"; 175 176 union sockunion ctrl_addr; 177 union sockunion data_source; 178 union sockunion data_dest; 179 union sockunion his_addr; 180 union sockunion pasv_addr; 181 182 int data; 183 jmp_buf errcatch, urgcatch; 184 int logged_in; 185 struct passwd *pw; 186 int debug; 187 int sflag; 188 int logging; 189 int guest; 190 int dochroot; 191 int type; 192 int form; 193 int stru; /* avoid C keyword */ 194 int mode; 195 int usedefault = 1; /* for data transfers */ 196 int pdata = -1; /* for passive mode */ 197 int family = AF_INET; 198 sig_atomic_t transflag; 199 off_t file_size; 200 off_t byte_count; 201 char tmpline[7]; 202 char hostname[MAXHOSTNAMELEN+1]; 203 char remotehost[MAXHOSTNAMELEN+1]; 204 static char ttyline[20]; 205 char *tty = ttyline; /* for klogin */ 206 207 off_t total_data_in; /* total file data bytes received */ 208 off_t total_data_out; /* total file data bytes sent data */ 209 off_t total_data; /* total file data bytes transferred data */ 210 off_t total_files_in; /* total number of data files received */ 211 off_t total_files_out; /* total number of data files sent */ 212 off_t total_files; /* total number of data files transferred */ 213 off_t total_bytes_in; /* total bytes received */ 214 off_t total_bytes_out; /* total bytes sent */ 215 off_t total_bytes; /* total bytes transferred */ 216 off_t total_xfers_in; /* total number of xfers incoming */ 217 off_t total_xfers_out; /* total number of xfers outgoing */ 218 off_t total_xfers; /* total number of xfers */ 219 220 static char *anondir = NULL; 221 static char confdir[MAXPATHLEN]; 222 223 #if defined(KERBEROS) || defined(KERBEROS5) 224 int notickets = 1; 225 char *krbtkfile_env = NULL; 226 #endif 227 228 int epsvall = 0; 229 230 /* 231 * Timeout intervals for retrying connections 232 * to hosts that don't accept PORT cmds. This 233 * is a kludge, but given the problems with TCP... 234 */ 235 #define SWAITMAX 90 /* wait at most 90 seconds */ 236 #define SWAITINT 5 /* interval between retries */ 237 238 int swaitmax = SWAITMAX; 239 int swaitint = SWAITINT; 240 241 #ifdef HASSETPROCTITLE 242 char proctitle[BUFSIZ]; /* initial part of title */ 243 #endif /* HASSETPROCTITLE */ 244 245 static void ack __P((const char *)); 246 static void myoob __P((int)); 247 static int checkuser __P((const char *, const char *, int, int)); 248 static int checkaccess __P((const char *)); 249 static FILE *dataconn __P((const char *, off_t, const char *)); 250 static void dolog __P((struct sockaddr *)); 251 static void end_login __P((void)); 252 static FILE *getdatasock __P((const char *)); 253 static char *gunique __P((const char *)); 254 static void lostconn __P((int)); 255 static int receive_data __P((FILE *, FILE *)); 256 static void replydirname __P((const char *, const char *)); 257 static int send_data __P((FILE *, FILE *, off_t, int)); 258 static struct passwd * 259 sgetpwnam __P((const char *)); 260 261 int main __P((int, char *[])); 262 263 #if defined(KERBEROS) || defined(KERBEROS5) 264 int klogin __P((struct passwd *, char *, char *, char *)); 265 void kdestroy __P((void)); 266 #endif 267 268 int 269 main(argc, argv) 270 int argc; 271 char *argv[]; 272 { 273 int addrlen, ch, on = 1, tos, keepalive; 274 char *cp, line[LINE_MAX]; 275 FILE *fd; 276 #ifdef KERBEROS5 277 krb5_error_code kerror; 278 #endif 279 280 debug = 0; 281 logging = 0; 282 sflag = 0; 283 (void)strcpy(confdir, _DEFAULT_CONFDIR); 284 285 while ((ch = getopt(argc, argv, "a:c:C:dlst:T:u:v46")) != -1) { 286 switch (ch) { 287 case 'a': 288 anondir = optarg; 289 break; 290 291 case 'c': 292 (void)strncpy(confdir, optarg, sizeof(confdir)); 293 confdir[sizeof(confdir)-1] = '\0'; 294 break; 295 296 case 'C': 297 exit(checkaccess(optarg)); 298 /* NOTREACHED */ 299 300 case 'd': 301 case 'v': /* deprecated */ 302 debug = 1; 303 break; 304 305 case 'l': 306 logging++; /* > 1 == extra logging */ 307 break; 308 309 case 's': 310 sflag = 1; 311 break; 312 313 case 't': 314 case 'T': 315 case 'u': 316 warnx("-%c has been deprecated in favour of ftpd.conf", 317 ch); 318 break; 319 320 case '4': 321 family = AF_INET; 322 break; 323 324 case '6': 325 family = AF_INET6; 326 break; 327 328 default: 329 if (optopt == 'a' || optopt == 'C') 330 exit(1); 331 warnx("unknown flag -%c ignored", optopt); 332 break; 333 } 334 } 335 336 /* 337 * LOG_NDELAY sets up the logging connection immediately, 338 * necessary for anonymous ftp's that chroot and can't do it later. 339 */ 340 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 341 addrlen = sizeof(his_addr); /* xxx */ 342 if (getpeername(0, (struct sockaddr *)&his_addr, &addrlen) < 0) { 343 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 344 exit(1); 345 } 346 addrlen = sizeof(ctrl_addr); 347 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 348 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 349 exit(1); 350 } 351 if (his_addr.su_family == AF_INET6 352 && IN6_IS_ADDR_V4MAPPED(&his_addr.su_sin6.sin6_addr)) { 353 #if 1 354 /* 355 * IPv4 control connection arrived to AF_INET6 socket. 356 * I hate to do this, but this is the easiest solution. 357 */ 358 union sockunion tmp_addr; 359 360 tmp_addr = his_addr; 361 memset(&his_addr, 0, sizeof(his_addr)); 362 his_addr.su_sin.sin_family = AF_INET; 363 his_addr.su_sin.sin_len = sizeof(his_addr.su_sin); 364 memcpy(&his_addr.su_sin.sin_addr, 365 &tmp_addr.su_sin6.sin6_addr.s6_addr32[3], 366 sizeof(his_addr.su_sin.sin_addr)); 367 his_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port; 368 369 tmp_addr = ctrl_addr; 370 memset(&ctrl_addr, 0, sizeof(ctrl_addr)); 371 ctrl_addr.su_sin.sin_family = AF_INET; 372 ctrl_addr.su_sin.sin_len = sizeof(ctrl_addr.su_sin); 373 memcpy(&ctrl_addr.su_sin.sin_addr, 374 &tmp_addr.su_sin6.sin6_addr.s6_addr32[3], 375 sizeof(ctrl_addr.su_sin.sin_addr)); 376 ctrl_addr.su_sin.sin_port = tmp_addr.su_sin6.sin6_port; 377 #else 378 while (fgets(line, sizeof(line), fd) != NULL) { 379 if ((cp = strchr(line, '\n')) != NULL) 380 *cp = '\0'; 381 lreply(530, "%s", line); 382 } 383 (void) fflush(stdout); 384 (void) fclose(fd); 385 reply(530, 386 "Connection from IPv4 mapped address is not supported."); 387 exit(0); 388 #endif 389 } 390 #ifdef IP_TOS 391 if (family == AF_INET) { 392 tos = IPTOS_LOWDELAY; 393 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, 394 sizeof(int)) < 0) 395 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 396 } 397 #endif 398 data_source.su_port = htons(ntohs(ctrl_addr.su_port) - 1); 399 400 /* set this here so klogin can use it... */ 401 (void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid()); 402 403 (void) freopen(_PATH_DEVNULL, "w", stderr); 404 (void) signal(SIGPIPE, lostconn); 405 (void) signal(SIGCHLD, SIG_IGN); 406 if ((long)signal(SIGURG, myoob) < 0) 407 syslog(LOG_ERR, "signal: %m"); 408 409 /* Try to handle urgent data inline */ 410 #ifdef SO_OOBINLINE 411 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 412 syslog(LOG_ERR, "setsockopt: %m"); 413 #endif 414 /* Set keepalives on the socket to detect dropped connections. */ 415 #ifdef SO_KEEPALIVE 416 keepalive = 1; 417 if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive, 418 sizeof(int)) < 0) 419 syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); 420 #endif 421 422 #ifdef F_SETOWN 423 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 424 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 425 #endif 426 dolog((struct sockaddr *)&his_addr); 427 /* 428 * Set up default state 429 */ 430 data = -1; 431 type = TYPE_A; 432 form = FORM_N; 433 stru = STRU_F; 434 mode = MODE_S; 435 tmpline[0] = '\0'; 436 hasyyerrored = 0; 437 438 #ifdef KERBEROS5 439 kerror = krb5_init_context(&kcontext); 440 if (kerror) { 441 syslog(LOG_NOTICE, "%s when initializing Kerberos context", 442 error_message(kerror)); 443 exit(0); 444 } 445 #endif /* KERBEROS5 */ 446 447 /* If logins are disabled, print out the message. */ 448 if ((fd = fopen(_PATH_NOLOGIN,"r")) != NULL) { 449 lreply(530, ""); 450 while (fgets(line, sizeof(line), fd) != NULL) { 451 if ((cp = strchr(line, '\n')) != NULL) 452 *cp = '\0'; 453 lreply(0, "%s", line); 454 } 455 (void) fflush(stdout); 456 (void) fclose(fd); 457 reply(530, "System not available."); 458 exit(0); 459 } 460 if ((fd = fopen(conffilename(_PATH_FTPWELCOME), "r")) != NULL) { 461 lreply(220, ""); 462 while (fgets(line, sizeof(line), fd) != NULL) { 463 if ((cp = strchr(line, '\n')) != NULL) 464 *cp = '\0'; 465 lreply(0, "%s", line); 466 } 467 (void) fflush(stdout); 468 (void) fclose(fd); 469 /* reply(220,) must follow */ 470 } 471 (void)gethostname(hostname, sizeof(hostname)); 472 hostname[sizeof(hostname) - 1] = '\0'; 473 reply(220, "%s FTP server (%s) ready.", hostname, version); 474 curclass.timeout = 300; /* 5 minutes, as per login(1) */ 475 (void) setjmp(errcatch); 476 for (;;) 477 (void) yyparse(); 478 /* NOTREACHED */ 479 } 480 481 static void 482 lostconn(signo) 483 int signo; 484 { 485 486 if (debug) 487 syslog(LOG_DEBUG, "lost connection"); 488 dologout(1); 489 } 490 491 /* 492 * Save the result of a getpwnam. Used for USER command, since 493 * the data returned must not be clobbered by any other command 494 * (e.g., globbing). 495 */ 496 static struct passwd * 497 sgetpwnam(name) 498 const char *name; 499 { 500 static struct passwd save; 501 struct passwd *p; 502 503 if ((p = getpwnam(name)) == NULL) 504 return (p); 505 if (save.pw_name) { 506 free((char *)save.pw_name); 507 free((char *)save.pw_passwd); 508 free((char *)save.pw_gecos); 509 free((char *)save.pw_dir); 510 free((char *)save.pw_shell); 511 } 512 save = *p; 513 save.pw_name = xstrdup(p->pw_name); 514 save.pw_passwd = xstrdup(p->pw_passwd); 515 save.pw_gecos = xstrdup(p->pw_gecos); 516 save.pw_dir = xstrdup(p->pw_dir); 517 save.pw_shell = xstrdup(p->pw_shell); 518 return (&save); 519 } 520 521 static int login_attempts; /* number of failed login attempts */ 522 static int askpasswd; /* had user command, ask for passwd */ 523 static char curname[10]; /* current USER name */ 524 525 /* 526 * USER command. 527 * Sets global passwd pointer pw if named account exists and is acceptable; 528 * sets askpasswd if a PASS command is expected. If logged in previously, 529 * need to reset state. If name is "ftp" or "anonymous", the name is not in 530 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 531 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 532 * requesting login privileges. Disallow anyone who does not have a standard 533 * shell as returned by getusershell(). Disallow anyone mentioned in the file 534 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 535 */ 536 void 537 user(name) 538 const char *name; 539 { 540 if (logged_in) { 541 if (guest) { 542 reply(530, "Can't change user from guest login."); 543 return; 544 } else if (dochroot) { 545 reply(530, "Can't change user from chroot user."); 546 return; 547 } 548 end_login(); 549 } 550 551 #if defined(KERBEROS) || defined(KERBEROS5) 552 kdestroy(); 553 #endif 554 555 guest = 0; 556 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 557 if (checkaccess("ftp") || checkaccess("anonymous")) 558 reply(530, "User %s access denied.", name); 559 else if ((pw = sgetpwnam("ftp")) != NULL) { 560 guest = 1; 561 askpasswd = 1; 562 reply(331, 563 "Guest login ok, type your name as password."); 564 } else 565 reply(530, "User %s unknown.", name); 566 if (!askpasswd && logging) 567 syslog(LOG_NOTICE, 568 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 569 return; 570 } 571 572 pw = sgetpwnam(name); 573 if (logging) 574 strncpy(curname, name, sizeof(curname)-1); 575 576 #ifdef SKEY 577 if (skey_haskey(name) == 0) { 578 char *myskey; 579 580 myskey = skey_keyinfo(name); 581 reply(331, "Password [%s] required for %s.", 582 myskey ? myskey : "error getting challenge", name); 583 } else 584 #endif 585 reply(331, "Password required for %s.", name); 586 587 askpasswd = 1; 588 /* 589 * Delay before reading passwd after first failed 590 * attempt to slow down passwd-guessing programs. 591 */ 592 if (login_attempts) 593 sleep((unsigned) login_attempts); 594 } 595 596 /* 597 * Determine whether something is to happen (allow access, chroot) 598 * for a user. Each line is a shell-style glob followed by 599 * `yes' or `no'. 600 * 601 * For backward compatability, `allow' and `deny' are synonymns 602 * for `yes' and `no', respectively. 603 * 604 * Each glob is matched against the username in turn, and the first 605 * match found is used. If no match is found, the result is the 606 * argument `def'. If a match is found but without and explicit 607 * `yes'/`no', the result is the opposite of def. 608 * 609 * If the file doesn't exist at all, the result is the argument 610 * `nofile' 611 * 612 * Any line starting with `#' is considered a comment and ignored. 613 * 614 * Returns FALSE if the user is denied, or TRUE if they are allowed. 615 */ 616 int 617 checkuser(fname, name, def, nofile) 618 const char *fname, *name; 619 int def, nofile; 620 { 621 FILE *fd; 622 int retval; 623 char *glob, *perm, line[BUFSIZ]; 624 625 retval = def; 626 if ((fd = fopen(conffilename(fname), "r")) == NULL) 627 return nofile; 628 629 while (fgets(line, sizeof(line), fd) != NULL) { 630 glob = strtok(line, " \t\n"); 631 if (glob == NULL || glob[0] == '#') 632 continue; 633 perm = strtok(NULL, " \t\n"); 634 if (perm == NULL) 635 continue; 636 if (fnmatch(glob, name, 0) == 0) { 637 if (perm != NULL && 638 ((strcasecmp(perm, "allow") == 0) || 639 (strcasecmp(perm, "yes") == 0))) 640 retval = TRUE; 641 else if (perm != NULL && 642 ((strcasecmp(perm, "deny") == 0) || 643 (strcasecmp(perm, "no") == 0))) 644 retval = FALSE; 645 else 646 retval = !def; 647 break; 648 } 649 } 650 (void) fclose(fd); 651 return (retval); 652 } 653 654 /* 655 * Check if user is allowed by /etc/ftpusers 656 * returns 0 for yes, 1 for no 657 */ 658 int 659 checkaccess(name) 660 const char *name; 661 { 662 663 return (! checkuser(_PATH_FTPUSERS, name, TRUE, FALSE)); 664 } 665 666 /* 667 * Terminate login as previous user, if any, resetting state; 668 * used when USER command is given or login fails. 669 */ 670 static void 671 end_login() 672 { 673 674 (void) seteuid((uid_t)0); 675 if (logged_in) 676 logwtmp(ttyline, "", ""); 677 pw = NULL; 678 logged_in = 0; 679 guest = 0; 680 dochroot = 0; 681 } 682 683 void 684 pass(passwd) 685 const char *passwd; 686 { 687 int rval; 688 FILE *fd; 689 char const *cp, *shell, *home; 690 691 if (logged_in || askpasswd == 0) { 692 reply(503, "Login with USER first."); 693 return; 694 } 695 askpasswd = 0; 696 if (!guest) { /* "ftp" is only account allowed no password */ 697 if (pw == NULL) { 698 rval = 1; /* failure below */ 699 goto skip; 700 } 701 #ifdef KERBEROS 702 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 703 rval = 0; 704 goto skip; 705 } 706 #endif 707 #ifdef KERBEROS5 708 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 709 rval = 0; 710 goto skip; 711 } 712 #endif 713 #ifdef SKEY 714 if (skey_haskey(pw->pw_name) == 0) { 715 char *p; 716 int r; 717 718 p = xstrdup(passwd); 719 r = skey_passcheck(pw->pw_name, p); 720 free(p); 721 if (r != -1) { 722 rval = 0; 723 goto skip; 724 } 725 } 726 #endif 727 if (!sflag && *pw->pw_passwd != '\0' && 728 !strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd)) { 729 rval = 0; 730 goto skip; 731 } 732 rval = 1; 733 734 skip: 735 if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire) 736 rval = 2; 737 /* 738 * If rval > 0, the user failed the authentication check 739 * above. If rval == 0, either Kerberos or local authentication 740 * succeeded. 741 */ 742 if (rval) { 743 reply(530, rval == 2 ? "Password expired." : 744 "Login incorrect."); 745 if (logging) { 746 syslog(LOG_NOTICE, 747 "FTP LOGIN FAILED FROM %s", remotehost); 748 syslog(LOG_AUTHPRIV | LOG_NOTICE, 749 "FTP LOGIN FAILED FROM %s, %s", 750 remotehost, curname); 751 } 752 pw = NULL; 753 if (login_attempts++ >= 5) { 754 syslog(LOG_NOTICE, 755 "repeated login failures from %s", 756 remotehost); 757 exit(0); 758 } 759 return; 760 } 761 } 762 763 /* password was ok; see if anything else prevents login */ 764 if (checkaccess(pw->pw_name)) { 765 reply(530, "User %s may not use FTP.", pw->pw_name); 766 if (logging) 767 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 768 remotehost, pw->pw_name); 769 pw = (struct passwd *) NULL; 770 return; 771 } 772 /* check for valid shell, if not guest user */ 773 if ((shell = pw->pw_shell) == NULL || *shell == 0) 774 shell = _PATH_BSHELL; 775 while ((cp = getusershell()) != NULL) 776 if (strcmp(cp, shell) == 0) 777 break; 778 endusershell(); 779 if (cp == NULL && guest == 0) { 780 reply(530, "User %s may not use FTP.", pw->pw_name); 781 if (logging) 782 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 783 remotehost, pw->pw_name); 784 pw = (struct passwd *) NULL; 785 return; 786 } 787 788 login_attempts = 0; /* this time successful */ 789 if (setegid((gid_t)pw->pw_gid) < 0) { 790 reply(550, "Can't set gid."); 791 return; 792 } 793 (void) initgroups(pw->pw_name, pw->pw_gid); 794 795 /* open wtmp before chroot */ 796 logwtmp(ttyline, pw->pw_name, remotehost); 797 logged_in = 1; 798 799 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name, FALSE, FALSE); 800 801 /* parse ftpd.conf, setting up various parameters */ 802 if (guest) 803 parse_conf(CLASS_GUEST); 804 else if (dochroot) 805 parse_conf(CLASS_CHROOT); 806 else 807 parse_conf(CLASS_REAL); 808 809 home = "/"; 810 if (guest) { 811 /* 812 * We MUST do a chdir() after the chroot. Otherwise 813 * the old current directory will be accessible as "." 814 * outside the new root! 815 */ 816 if (chroot(anondir ? anondir : pw->pw_dir) < 0 || 817 chdir("/") < 0) { 818 reply(550, "Can't set guest privileges."); 819 goto bad; 820 } 821 } else if (dochroot) { 822 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 823 reply(550, "Can't change root."); 824 goto bad; 825 } 826 } else if (chdir(pw->pw_dir) < 0) { 827 if (chdir("/") < 0) { 828 reply(530, "User %s: can't change directory to %s.", 829 pw->pw_name, pw->pw_dir); 830 goto bad; 831 } else 832 lreply(230, "No directory! Logging in with home=/"); 833 } else 834 home = pw->pw_dir; 835 if (seteuid((uid_t)pw->pw_uid) < 0) { 836 reply(550, "Can't set uid."); 837 goto bad; 838 } 839 setenv("HOME", home, 1); 840 841 842 /* 843 * Display a login message, if it exists. 844 * N.B. reply(230,) must follow the message. 845 */ 846 if ((fd = fopen(conffilename(_PATH_FTPLOGINMESG), "r")) != NULL) { 847 char *cp, line[LINE_MAX]; 848 849 lreply(230, ""); 850 while (fgets(line, sizeof(line), fd) != NULL) { 851 if ((cp = strchr(line, '\n')) != NULL) 852 *cp = '\0'; 853 lreply(0, "%s", line); 854 } 855 (void) fflush(stdout); 856 (void) fclose(fd); 857 } 858 show_chdir_messages(230); 859 if (guest) { 860 reply(230, "Guest login ok, access restrictions apply."); 861 #ifdef HASSETPROCTITLE 862 snprintf(proctitle, sizeof(proctitle), 863 "%s: anonymous/%.*s", remotehost, 864 (int) (sizeof(proctitle) - sizeof(remotehost) - 865 sizeof(": anonymous/")), passwd); 866 setproctitle(proctitle); 867 #endif /* HASSETPROCTITLE */ 868 if (logging) 869 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 870 remotehost, passwd); 871 } else { 872 reply(230, "User %s logged in.", pw->pw_name); 873 #ifdef HASSETPROCTITLE 874 snprintf(proctitle, sizeof(proctitle), 875 "%s: %s", remotehost, pw->pw_name); 876 setproctitle(proctitle); 877 #endif /* HASSETPROCTITLE */ 878 if (logging) 879 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 880 remotehost, pw->pw_name); 881 } 882 (void) umask(curclass.umask); 883 return; 884 bad: 885 /* Forget all about it... */ 886 end_login(); 887 } 888 889 void 890 retrieve(cmd, name) 891 const char *cmd, *name; 892 { 893 FILE *fin = NULL, *dout; 894 struct stat st; 895 int (*closefunc) __P((FILE *)) = NULL; 896 int log, sendrv, closerv, stderrfd, isconversion, isdata, isls; 897 struct timeval start, finish, td, *tdp; 898 char tline[BUFSIZ]; 899 const char *dispname; 900 901 sendrv = closerv = stderrfd = -1; 902 isconversion = isdata = isls = log = 0; 903 tdp = NULL; 904 dispname = name; 905 if (cmd == NULL) { 906 log = 1; 907 isdata = 1; 908 fin = fopen(name, "r"); 909 closefunc = fclose; 910 if (fin == NULL) 911 cmd = do_conversion(name); 912 if (cmd != NULL) { 913 isconversion++; 914 syslog(LOG_INFO, "get command: '%s'", cmd); 915 } 916 } 917 if (cmd != NULL) { 918 char temp[MAXPATHLEN + 1]; 919 920 if (strncmp(cmd, INTERNAL_LS, sizeof(INTERNAL_LS) - 1) == 0 && 921 strchr(" \t\n", cmd[sizeof(INTERNAL_LS) - 1]) != NULL) { 922 isls = 1; 923 stderrfd = -1; 924 } else { 925 (void)snprintf(temp, sizeof(temp), "%s", TMPFILE); 926 stderrfd = mkstemp(temp); 927 if (stderrfd != -1) 928 (void)unlink(temp); 929 } 930 (void)snprintf(tline, sizeof(tline), cmd, name); 931 dispname = tline; 932 fin = ftpd_popen(tline, "r", stderrfd); 933 closefunc = ftpd_pclose; 934 st.st_size = -1; 935 st.st_blksize = BUFSIZ; 936 } 937 if (fin == NULL) { 938 if (errno != 0) { 939 perror_reply(550, dispname); 940 if (log) 941 logcmd("get", -1, name, NULL, NULL, 942 strerror(errno)); 943 } 944 if (stderrfd != -1) 945 (void)close(stderrfd); 946 return; 947 } 948 byte_count = -1; 949 if (cmd == NULL 950 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 951 reply(550, "%s: not a plain file.", dispname); 952 goto done; 953 } 954 if (restart_point) { 955 if (type == TYPE_A) { 956 off_t i; 957 int c; 958 959 for (i = 0; i < restart_point; i++) { 960 if ((c=getc(fin)) == EOF) { 961 perror_reply(550, dispname); 962 goto done; 963 } 964 if (c == '\n') 965 i++; 966 } 967 } else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 968 perror_reply(550, dispname); 969 goto done; 970 } 971 } 972 dout = dataconn(dispname, st.st_size, "w"); 973 if (dout == NULL) 974 goto done; 975 976 (void)gettimeofday(&start, NULL); 977 sendrv = send_data(fin, dout, st.st_blksize, isdata); 978 (void)gettimeofday(&finish, NULL); 979 (void) fclose(dout); 980 timersub(&finish, &start, &td); 981 tdp = &td; 982 data = -1; 983 pdata = -1; 984 done: 985 if (log) 986 logcmd("get", byte_count, name, NULL, tdp, NULL); 987 closerv = (*closefunc)(fin); 988 if (sendrv == 0) { 989 FILE *err; 990 struct stat sb; 991 992 if (!isls && cmd != NULL && closerv != 0) { 993 lreply(226, 994 "Command returned an exit status of %d", 995 closerv); 996 if (isconversion) 997 syslog(LOG_INFO, 998 "get command: '%s' returned %d", 999 cmd, closerv); 1000 } 1001 if (!isls && cmd != NULL && stderrfd != -1 && 1002 (fstat(stderrfd, &sb) == 0) && sb.st_size > 0 && 1003 ((err = fdopen(stderrfd, "r")) != NULL)) { 1004 char *cp, line[LINE_MAX]; 1005 1006 lreply(226, "Command error messages:"); 1007 rewind(err); 1008 while (fgets(line, sizeof(line), err) != NULL) { 1009 if ((cp = strchr(line, '\n')) != NULL) 1010 *cp = '\0'; 1011 lreply(0, " %s", line); 1012 } 1013 (void) fflush(stdout); 1014 (void) fclose(err); 1015 /* a reply(226,) must follow */ 1016 } 1017 reply(226, "Transfer complete."); 1018 } 1019 if (stderrfd != -1) 1020 (void)close(stderrfd); 1021 } 1022 1023 void 1024 store(name, mode, unique) 1025 const char *name, *mode; 1026 int unique; 1027 { 1028 FILE *fout, *din; 1029 struct stat st; 1030 int (*closefunc) __P((FILE *)); 1031 struct timeval start, finish, td, *tdp; 1032 char *desc; 1033 1034 desc = (*mode == 'w') ? "put" : "append"; 1035 if (unique && stat(name, &st) == 0 && 1036 (name = gunique(name)) == NULL) { 1037 logcmd(desc, -1, name, NULL, NULL, "cannot create unique file"); 1038 return; 1039 } 1040 1041 if (restart_point) 1042 mode = "r+"; 1043 fout = fopen(name, mode); 1044 closefunc = fclose; 1045 tdp = NULL; 1046 if (fout == NULL) { 1047 perror_reply(553, name); 1048 logcmd(desc, -1, name, NULL, NULL, strerror(errno)); 1049 return; 1050 } 1051 byte_count = -1; 1052 if (restart_point) { 1053 if (type == TYPE_A) { 1054 off_t i; 1055 int c; 1056 1057 for (i = 0; i < restart_point; i++) { 1058 if ((c=getc(fout)) == EOF) { 1059 perror_reply(550, name); 1060 goto done; 1061 } 1062 if (c == '\n') 1063 i++; 1064 } 1065 /* 1066 * We must do this seek to "current" position 1067 * because we are changing from reading to 1068 * writing. 1069 */ 1070 if (fseek(fout, 0L, SEEK_CUR) < 0) { 1071 perror_reply(550, name); 1072 goto done; 1073 } 1074 } else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1075 perror_reply(550, name); 1076 goto done; 1077 } 1078 } 1079 din = dataconn(name, (off_t)-1, "r"); 1080 if (din == NULL) 1081 goto done; 1082 (void)gettimeofday(&start, NULL); 1083 if (receive_data(din, fout) == 0) { 1084 if (unique) 1085 reply(226, "Transfer complete (unique file name:%s).", 1086 name); 1087 else 1088 reply(226, "Transfer complete."); 1089 } 1090 (void)gettimeofday(&finish, NULL); 1091 (void) fclose(din); 1092 timersub(&finish, &start, &td); 1093 tdp = &td; 1094 data = -1; 1095 pdata = -1; 1096 done: 1097 logcmd(desc, byte_count, name, NULL, tdp, NULL); 1098 (*closefunc)(fout); 1099 } 1100 1101 static FILE * 1102 getdatasock(mode) 1103 const char *mode; 1104 { 1105 int on = 1, s, t, tries; 1106 1107 if (data >= 0) 1108 return (fdopen(data, mode)); 1109 (void) seteuid((uid_t)0); 1110 s = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 1111 if (s < 0) 1112 goto bad; 1113 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 1114 (char *) &on, sizeof(on)) < 0) 1115 goto bad; 1116 if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1117 (char *) &on, sizeof(on)) < 0) 1118 goto bad; 1119 /* anchor socket to avoid multi-homing problems */ 1120 data_source = ctrl_addr; 1121 data_source.su_port = htons(20); /* ftp-data port */ 1122 for (tries = 1; ; tries++) { 1123 if (bind(s, (struct sockaddr *)&data_source, 1124 data_source.su_len) >= 0) 1125 break; 1126 if (errno != EADDRINUSE || tries > 10) 1127 goto bad; 1128 sleep(tries); 1129 } 1130 (void) seteuid((uid_t)pw->pw_uid); 1131 #ifdef IP_TOS 1132 if (ctrl_addr.su_family == AF_INET) { 1133 on = IPTOS_THROUGHPUT; 1134 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, 1135 sizeof(int)) < 0) 1136 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 1137 } 1138 #endif 1139 return (fdopen(s, mode)); 1140 bad: 1141 /* Return the real value of errno (close may change it) */ 1142 t = errno; 1143 (void) seteuid((uid_t)pw->pw_uid); 1144 (void) close(s); 1145 errno = t; 1146 return (NULL); 1147 } 1148 1149 static FILE * 1150 dataconn(name, size, mode) 1151 const char *name; 1152 off_t size; 1153 const char *mode; 1154 { 1155 char sizebuf[32]; 1156 FILE *file; 1157 int retry = 0, tos, keepalive; 1158 1159 file_size = size; 1160 byte_count = 0; 1161 if (size != (off_t) -1) 1162 (void)snprintf(sizebuf, sizeof(sizebuf), " (%qd byte%s)", 1163 (qdfmt_t)size, PLURAL(size)); 1164 else 1165 sizebuf[0] = '\0'; 1166 if (pdata >= 0) { 1167 union sockunion from; 1168 int s, fromlen = sizeof(from); 1169 1170 (void) alarm(curclass.timeout); 1171 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 1172 (void) alarm(0); 1173 if (s < 0) { 1174 reply(425, "Can't open data connection."); 1175 (void) close(pdata); 1176 pdata = -1; 1177 return (NULL); 1178 } 1179 (void) close(pdata); 1180 pdata = s; 1181 switch (from.su_family) { 1182 case AF_INET: 1183 #ifdef IP_TOS 1184 tos = IPTOS_THROUGHPUT; 1185 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 1186 sizeof(int)); 1187 break; 1188 #endif 1189 } 1190 /* Set keepalives on the socket to detect dropped conns. */ 1191 #ifdef SO_KEEPALIVE 1192 keepalive = 1; 1193 (void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1194 (char *)&keepalive, sizeof(int)); 1195 #endif 1196 reply(150, "Opening %s mode data connection for '%s'%s.", 1197 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1198 return (fdopen(pdata, mode)); 1199 } 1200 if (data >= 0) { 1201 reply(125, "Using existing data connection for '%s'%s.", 1202 name, sizebuf); 1203 usedefault = 1; 1204 return (fdopen(data, mode)); 1205 } 1206 if (usedefault) 1207 data_dest = his_addr; 1208 usedefault = 1; 1209 file = getdatasock(mode); 1210 if (file == NULL) { 1211 char hbuf[INET6_ADDRSTRLEN]; 1212 char pbuf[10]; 1213 getnameinfo((struct sockaddr *)&data_source, data_source.su_len, 1214 hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), 1215 NI_NUMERICHOST | NI_NUMERICSERV); 1216 reply(425, "Can't create data socket (%s,%s): %s.", 1217 hbuf, pbuf, strerror(errno)); 1218 return (NULL); 1219 } 1220 data = fileno(file); 1221 while (connect(data, (struct sockaddr *)&data_dest, 1222 data_dest.su_len) < 0) { 1223 if (errno == EADDRINUSE && retry < swaitmax) { 1224 sleep((unsigned) swaitint); 1225 retry += swaitint; 1226 continue; 1227 } 1228 perror_reply(425, "Can't build data connection"); 1229 (void) fclose(file); 1230 data = -1; 1231 return (NULL); 1232 } 1233 reply(150, "Opening %s mode data connection for '%s'%s.", 1234 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1235 return (file); 1236 } 1237 1238 /* 1239 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 1240 * encapsulation of the data subject * to Mode, Structure, and Type. 1241 * 1242 * NB: Form isn't handled. 1243 */ 1244 static int 1245 send_data(instr, outstr, blksize, isdata) 1246 FILE *instr, *outstr; 1247 off_t blksize; 1248 int isdata; 1249 { 1250 int c, cnt, filefd, netfd, rval; 1251 char *buf; 1252 1253 transflag = 1; 1254 rval = -1; 1255 buf = NULL; 1256 if (setjmp(urgcatch)) 1257 goto cleanup_send_data; 1258 1259 switch (type) { 1260 1261 case TYPE_A: 1262 (void) alarm(curclass.timeout); 1263 while ((c = getc(instr)) != EOF) { 1264 byte_count++; 1265 if (c == '\n') { 1266 if (ferror(outstr)) 1267 goto data_err; 1268 (void) putc('\r', outstr); 1269 if (isdata) { 1270 total_data_out++; 1271 total_data++; 1272 } 1273 total_bytes_out++; 1274 total_bytes++; 1275 } 1276 (void) putc(c, outstr); 1277 if (isdata) { 1278 total_data_out++; 1279 total_data++; 1280 } 1281 total_bytes_out++; 1282 total_bytes++; 1283 if ((byte_count % 4096) == 0) 1284 (void) alarm(curclass.timeout); 1285 } 1286 (void) alarm(0); 1287 fflush(outstr); 1288 if (ferror(instr)) 1289 goto file_err; 1290 if (ferror(outstr)) 1291 goto data_err; 1292 rval = 0; 1293 goto cleanup_send_data; 1294 1295 case TYPE_I: 1296 case TYPE_L: 1297 if ((buf = malloc((size_t)blksize)) == NULL) { 1298 perror_reply(451, "Local resource failure: malloc"); 1299 goto cleanup_send_data; 1300 } 1301 filefd = fileno(instr); 1302 netfd = fileno(outstr); 1303 (void) alarm(curclass.timeout); 1304 while ((cnt = read(filefd, buf, (size_t)blksize)) > 0) { 1305 if (write(netfd, buf, cnt) != cnt) 1306 goto data_err; 1307 (void) alarm(curclass.timeout); 1308 byte_count += cnt; 1309 if (isdata) { 1310 total_data_out += cnt; 1311 total_data += cnt; 1312 } 1313 total_bytes_out += cnt; 1314 total_bytes += cnt; 1315 } 1316 if (cnt < 0) 1317 goto file_err; 1318 rval = 0; 1319 goto cleanup_send_data; 1320 1321 default: 1322 reply(550, "Unimplemented TYPE %d in send_data", type); 1323 goto cleanup_send_data; 1324 } 1325 1326 data_err: 1327 (void) alarm(0); 1328 perror_reply(426, "Data connection"); 1329 goto cleanup_send_data; 1330 1331 file_err: 1332 (void) alarm(0); 1333 perror_reply(551, "Error on input file"); 1334 /* FALLTHROUGH */ 1335 1336 cleanup_send_data: 1337 (void) alarm(0); 1338 transflag = 0; 1339 if (buf) 1340 free(buf); 1341 if (isdata) { 1342 total_files_out++; 1343 total_files++; 1344 } 1345 total_xfers_out++; 1346 total_xfers++; 1347 return (rval); 1348 } 1349 1350 /* 1351 * Transfer data from peer to "outstr" using the appropriate encapulation of 1352 * the data subject to Mode, Structure, and Type. 1353 * 1354 * N.B.: Form isn't handled. 1355 */ 1356 static int 1357 receive_data(instr, outstr) 1358 FILE *instr, *outstr; 1359 { 1360 int c, cnt, bare_lfs, netfd, filefd, rval; 1361 char buf[BUFSIZ]; 1362 #ifdef __GNUC__ 1363 (void) &bare_lfs; 1364 #endif 1365 1366 bare_lfs = 0; 1367 transflag = 1; 1368 rval = -1; 1369 if (setjmp(urgcatch)) 1370 goto cleanup_recv_data; 1371 1372 switch (type) { 1373 1374 case TYPE_I: 1375 case TYPE_L: 1376 netfd = fileno(instr); 1377 filefd = fileno(outstr); 1378 (void) alarm(curclass.timeout); 1379 while ((cnt = read(netfd, buf, sizeof(buf))) > 0) { 1380 if (write(filefd, buf, cnt) != cnt) 1381 goto file_err; 1382 (void) alarm(curclass.timeout); 1383 byte_count += cnt; 1384 total_data_in += cnt; 1385 total_data += cnt; 1386 total_bytes_in += cnt; 1387 total_bytes += cnt; 1388 } 1389 if (cnt < 0) 1390 goto data_err; 1391 rval = 0; 1392 goto cleanup_recv_data; 1393 1394 case TYPE_E: 1395 reply(553, "TYPE E not implemented."); 1396 goto cleanup_recv_data; 1397 1398 case TYPE_A: 1399 (void) alarm(curclass.timeout); 1400 while ((c = getc(instr)) != EOF) { 1401 byte_count++; 1402 total_data_in++; 1403 total_data++; 1404 total_bytes_in++; 1405 total_bytes++; 1406 if ((byte_count % 4096) == 0) 1407 (void) alarm(curclass.timeout); 1408 if (c == '\n') 1409 bare_lfs++; 1410 while (c == '\r') { 1411 if (ferror(outstr)) 1412 goto data_err; 1413 if ((c = getc(instr)) != '\n') { 1414 byte_count++; 1415 total_data_in++; 1416 total_data++; 1417 total_bytes_in++; 1418 total_bytes++; 1419 if ((byte_count % 4096) == 0) 1420 (void) alarm(curclass.timeout); 1421 (void) putc ('\r', outstr); 1422 if (c == '\0' || c == EOF) 1423 goto contin2; 1424 } 1425 } 1426 (void) putc(c, outstr); 1427 contin2: ; 1428 } 1429 (void) alarm(0); 1430 fflush(outstr); 1431 if (ferror(instr)) 1432 goto data_err; 1433 if (ferror(outstr)) 1434 goto file_err; 1435 if (bare_lfs) { 1436 lreply(226, 1437 "WARNING! %d bare linefeeds received in ASCII mode", 1438 bare_lfs); 1439 lreply(0, "File may not have transferred correctly."); 1440 } 1441 rval = 0; 1442 goto cleanup_recv_data; 1443 1444 default: 1445 reply(550, "Unimplemented TYPE %d in receive_data", type); 1446 goto cleanup_recv_data; 1447 } 1448 1449 data_err: 1450 (void) alarm(0); 1451 perror_reply(426, "Data Connection"); 1452 goto cleanup_recv_data; 1453 1454 file_err: 1455 (void) alarm(0); 1456 perror_reply(452, "Error writing file"); 1457 goto cleanup_recv_data; 1458 1459 cleanup_recv_data: 1460 (void) alarm(0); 1461 transflag = 0; 1462 total_files_in++; 1463 total_files++; 1464 total_xfers_in++; 1465 total_xfers++; 1466 return (rval); 1467 } 1468 1469 void 1470 statfilecmd(filename) 1471 const char *filename; 1472 { 1473 FILE *fin; 1474 int c; 1475 char line[LINE_MAX]; 1476 1477 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1478 fin = ftpd_popen(line, "r", STDOUT_FILENO); 1479 lreply(211, "status of %s:", filename); 1480 while ((c = getc(fin)) != EOF) { 1481 if (c == '\n') { 1482 if (ferror(stdout)){ 1483 perror_reply(421, "control connection"); 1484 (void) ftpd_pclose(fin); 1485 dologout(1); 1486 /* NOTREACHED */ 1487 } 1488 if (ferror(fin)) { 1489 perror_reply(551, filename); 1490 (void) ftpd_pclose(fin); 1491 return; 1492 } 1493 (void) putc('\r', stdout); 1494 total_bytes++; 1495 total_bytes_out++; 1496 } 1497 (void) putc(c, stdout); 1498 total_bytes++; 1499 total_bytes_out++; 1500 } 1501 (void) ftpd_pclose(fin); 1502 reply(211, "End of Status"); 1503 } 1504 1505 void 1506 statcmd() 1507 { 1508 union sockunion *su = NULL; 1509 static char ntop_buf[INET6_ADDRSTRLEN]; 1510 u_char *a, *p; 1511 int ispassive; 1512 off_t b, otbi, otbo, otb; 1513 1514 a = p = (u_char *)NULL; 1515 1516 lreply(211, "%s FTP server status:", hostname); 1517 lreply(0, "%s", version); 1518 ntop_buf[0] = '\0'; 1519 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len, 1520 ntop_buf, sizeof(ntop_buf), NULL, 0, NI_NUMERICHOST) 1521 && strcmp(remotehost, ntop_buf) != 0) { 1522 lreply(0, "Connected to %s (%s)", remotehost, ntop_buf); 1523 } else 1524 lreply(0, "Connected to %s", remotehost); 1525 if (logged_in) { 1526 if (guest) 1527 lreply(0, "Logged in anonymously"); 1528 else 1529 lreply(0, "Logged in as %s", pw->pw_name); 1530 } else if (askpasswd) 1531 lreply(0, "Waiting for password"); 1532 else 1533 lreply(0, "Waiting for user name"); 1534 b = printf(" TYPE: %s", typenames[type]); 1535 total_bytes += b; 1536 total_bytes_out += b; 1537 if (type == TYPE_A || type == TYPE_E) { 1538 b = printf(", FORM: %s", formnames[form]); 1539 total_bytes += b; 1540 total_bytes_out += b; 1541 } 1542 if (type == TYPE_L) { 1543 #if NBBY == 8 1544 b = printf(" %d", NBBY); 1545 #else 1546 /* XXX: `bytesize' needs to be defined in this case */ 1547 b = printf(" %d", bytesize); 1548 #endif 1549 total_bytes += b; 1550 total_bytes_out += b; 1551 } 1552 b = printf("; STRUcture: %s; transfer MODE: %s\r\n", 1553 strunames[stru], modenames[mode]); 1554 total_bytes += b; 1555 total_bytes_out += b; 1556 ispassive = 0; 1557 if (data != -1) { 1558 lreply(0, "Data connection open"); 1559 su = NULL; 1560 } else if (pdata != -1) { 1561 b = printf(" in Passive mode"); 1562 total_bytes += b; 1563 total_bytes_out += b; 1564 su = (union sockunion *)&pasv_addr; 1565 ispassive = 1; 1566 goto printaddr; 1567 } else if (usedefault == 0) { 1568 if (epsvall) { 1569 b = printf("211- EPSV only mode (EPSV ALL )\r\n"); 1570 total_bytes += b; 1571 total_bytes_out += b; 1572 goto epsvonly; 1573 } 1574 b = printf("211- %s", 1575 (data_dest.su_family == AF_INET) ? "PORT" : "LPRT"); 1576 total_bytes += b; 1577 total_bytes_out += b; 1578 su = (union sockunion *)&data_dest; 1579 printaddr: 1580 /* PASV/PORT */ 1581 if (su->su_family == AF_INET) { 1582 if (ispassive) 1583 b = printf("211- PASV "); 1584 else 1585 b = printf("211- PORT "); 1586 a = (u_char *) &su->su_sin.sin_addr; 1587 p = (u_char *) &su->su_sin.sin_port; 1588 #define UC(b) (((int) b) & 0xff) 1589 b += printf("(%d,%d,%d,%d,%d,%d)\r\n", 1590 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1591 UC(p[0]), UC(p[1])); 1592 total_bytes += b; 1593 total_bytes_out += b; 1594 } 1595 1596 /* LPSV/LPRT */ 1597 { 1598 int alen, af, i; 1599 1600 alen = 0; 1601 switch (su->su_family) { 1602 case AF_INET: 1603 a = (u_char *) &su->su_sin.sin_addr; 1604 p = (u_char *) &su->su_sin.sin_port; 1605 alen = sizeof(su->su_sin.sin_addr); 1606 af = 4; 1607 break; 1608 case AF_INET6: 1609 a = (u_char *) &su->su_sin6.sin6_addr; 1610 p = (u_char *) &su->su_sin6.sin6_port; 1611 alen = sizeof(su->su_sin6.sin6_addr); 1612 af = 6; 1613 break; 1614 default: 1615 af = 0; 1616 break; 1617 } 1618 if (af) { 1619 if (ispassive) 1620 b = printf("211- LPSV "); 1621 else 1622 b = printf("211- LPRT "); 1623 printf("(%d,%d", af, alen); 1624 for (i = 0; i < alen; i++) 1625 b += printf("%d,", UC(a[alen])); 1626 b += printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1])); 1627 total_bytes += b; 1628 total_bytes_out += b; 1629 #undef UC 1630 } 1631 } 1632 1633 /* EPRT/EPSV */ 1634 epsvonly:; 1635 { 1636 int af; 1637 1638 switch (su->su_family) { 1639 case AF_INET: 1640 af = 1; 1641 break; 1642 case AF_INET6: 1643 af = 2; 1644 break; 1645 default: 1646 af = 0; 1647 break; 1648 } 1649 if (af) { 1650 if (getnameinfo((struct sockaddr *)su, su->su_len, 1651 ntop_buf, sizeof(ntop_buf), NULL, 0, 1652 NI_NUMERICHOST) == 0) { 1653 if (ispassive) 1654 b = printf("211 - EPSV "); 1655 else 1656 b = printf("211 - EPRT "); 1657 b += printf("(|%d|%s|%d|)\r\n", 1658 af, ntop_buf, ntohs(su->su_port)); 1659 total_bytes += b; 1660 total_bytes_out += b; 1661 } 1662 } 1663 } 1664 } else 1665 lreply(0, "No data connection"); 1666 1667 if (logged_in) { 1668 lreply(0, "Data sent: %qd byte%s in %qd file%s", 1669 (qdfmt_t)total_data_out, PLURAL(total_data_out), 1670 (qdfmt_t)total_files_out, PLURAL(total_files_out)); 1671 lreply(0, "Data received: %qd byte%s in %qd file%s", 1672 (qdfmt_t)total_data_in, PLURAL(total_data_in), 1673 (qdfmt_t)total_files_in, PLURAL(total_files_in)); 1674 lreply(0, "Total data: %qd byte%s in %qd file%s", 1675 (qdfmt_t)total_data, PLURAL(total_data), 1676 (qdfmt_t)total_files, PLURAL(total_files)); 1677 } 1678 otbi = total_bytes_in; 1679 otbo = total_bytes_out; 1680 otb = total_bytes; 1681 lreply(0, "Traffic sent: %qd byte%s in %qd transfer%s", 1682 (qdfmt_t)otbo, PLURAL(otbo), 1683 (qdfmt_t)total_xfers_out, PLURAL(total_xfers_out)); 1684 lreply(0, "Traffic received: %qd byte%s in %qd transfer%s", 1685 (qdfmt_t)otbi, PLURAL(otbi), 1686 (qdfmt_t)total_xfers_in, PLURAL(total_xfers_in)); 1687 lreply(0, "Total traffic: %qd byte%s in %qd transfer%s", 1688 (qdfmt_t)otb, PLURAL(otb), 1689 (qdfmt_t)total_xfers, PLURAL(total_xfers)); 1690 1691 if (logged_in) { 1692 struct ftpconv *cp; 1693 1694 lreply(0, ""); 1695 lreply(0, "Class: %s", curclass.classname); 1696 lreply(0, "Check PORT/LPRT commands: %sabled", 1697 curclass.checkportcmd ? "en" : "dis"); 1698 if (curclass.display) 1699 lreply(0, "Display file: %s", curclass.display); 1700 if (curclass.notify) 1701 lreply(0, "Notify fileglob: %s", curclass.notify); 1702 lreply(0, "Idle timeout: %d, maximum timeout: %d", 1703 curclass.timeout, curclass.maxtimeout); 1704 lreply(0, "DELE, MKD, RMD, UMASK, CHMOD commands: %sabled", 1705 curclass.modify ? "en" : "dis"); 1706 lreply(0, "Umask: %.04o", curclass.umask); 1707 for (cp = curclass.conversions; cp != NULL; cp=cp->next) { 1708 if (cp->suffix == NULL || cp->types == NULL || 1709 cp->command == NULL) 1710 continue; 1711 lreply(0, 1712 "Conversion: %s [%s] disable: %s, command: %s", 1713 cp->suffix, cp->types, cp->disable, cp->command); 1714 } 1715 } 1716 1717 reply(211, "End of status"); 1718 } 1719 1720 void 1721 fatal(s) 1722 const char *s; 1723 { 1724 1725 reply(451, "Error in server: %s\n", s); 1726 reply(221, "Closing connection due to server error."); 1727 dologout(0); 1728 /* NOTREACHED */ 1729 } 1730 1731 void 1732 #ifdef __STDC__ 1733 reply(int n, const char *fmt, ...) 1734 #else 1735 reply(n, fmt, va_alist) 1736 int n; 1737 char *fmt; 1738 va_dcl 1739 #endif 1740 { 1741 off_t b; 1742 va_list ap; 1743 #ifdef __STDC__ 1744 va_start(ap, fmt); 1745 #else 1746 va_start(ap); 1747 #endif 1748 b = 0; 1749 b += printf("%d ", n); 1750 b += vprintf(fmt, ap); 1751 b += printf("\r\n"); 1752 total_bytes += b; 1753 total_bytes_out += b; 1754 (void)fflush(stdout); 1755 if (debug) { 1756 syslog(LOG_DEBUG, "<--- %d ", n); 1757 vsyslog(LOG_DEBUG, fmt, ap); 1758 } 1759 } 1760 1761 void 1762 #ifdef __STDC__ 1763 lreply(int n, const char *fmt, ...) 1764 #else 1765 lreply(n, fmt, va_alist) 1766 int n; 1767 char *fmt; 1768 va_dcl 1769 #endif 1770 { 1771 off_t b; 1772 va_list ap; 1773 #ifdef __STDC__ 1774 va_start(ap, fmt); 1775 #else 1776 va_start(ap); 1777 #endif 1778 b = 0; 1779 switch (n) { 1780 case 0: 1781 b += printf(" "); 1782 case -1: 1783 break; 1784 default: 1785 b += printf("%d-", n); 1786 break; 1787 } 1788 b += vprintf(fmt, ap); 1789 b += printf("\r\n"); 1790 total_bytes += b; 1791 total_bytes_out += b; 1792 (void)fflush(stdout); 1793 if (debug) { 1794 syslog(LOG_DEBUG, "<--- %d- ", n); 1795 vsyslog(LOG_DEBUG, fmt, ap); 1796 } 1797 } 1798 1799 static void 1800 ack(s) 1801 const char *s; 1802 { 1803 1804 reply(250, "%s command successful.", s); 1805 } 1806 1807 void 1808 delete(name) 1809 const char *name; 1810 { 1811 char *p = NULL; 1812 1813 if (remove(name) < 0) { 1814 p = strerror(errno); 1815 perror_reply(550, name); 1816 } else 1817 ack("DELE"); 1818 logcmd("delete", -1, name, NULL, NULL, p); 1819 } 1820 1821 void 1822 cwd(path) 1823 const char *path; 1824 { 1825 1826 if (chdir(path) < 0) 1827 perror_reply(550, path); 1828 else { 1829 show_chdir_messages(250); 1830 ack("CWD"); 1831 } 1832 } 1833 1834 static void 1835 replydirname(name, message) 1836 const char *name, *message; 1837 { 1838 char npath[MAXPATHLEN + 1]; 1839 int i; 1840 1841 for (i = 0; *name != '\0' && i < sizeof(npath) - 1; i++, name++) { 1842 npath[i] = *name; 1843 if (*name == '"') 1844 npath[++i] = '"'; 1845 } 1846 npath[i] = '\0'; 1847 reply(257, "\"%s\" %s", npath, message); 1848 } 1849 1850 void 1851 makedir(name) 1852 const char *name; 1853 { 1854 char *p = NULL; 1855 1856 if (mkdir(name, 0777) < 0) { 1857 p = strerror(errno); 1858 perror_reply(550, name); 1859 } else 1860 replydirname(name, "directory created."); 1861 logcmd("mkdir", -1, name, NULL, NULL, p); 1862 } 1863 1864 void 1865 removedir(name) 1866 const char *name; 1867 { 1868 char *p = NULL; 1869 1870 if (rmdir(name) < 0) { 1871 p = strerror(errno); 1872 perror_reply(550, name); 1873 } else 1874 ack("RMD"); 1875 logcmd("rmdir", -1, name, NULL, NULL, p); 1876 } 1877 1878 void 1879 pwd() 1880 { 1881 char path[MAXPATHLEN + 1]; 1882 1883 if (getcwd(path, sizeof(path) - 1) == NULL) 1884 reply(550, "Can't get the current directory: %s.", 1885 strerror(errno)); 1886 else 1887 replydirname(path, "is the current directory."); 1888 } 1889 1890 char * 1891 renamefrom(name) 1892 char *name; 1893 { 1894 struct stat st; 1895 1896 if (stat(name, &st) < 0) { 1897 perror_reply(550, name); 1898 return (NULL); 1899 } 1900 reply(350, "File exists, ready for destination name"); 1901 return (name); 1902 } 1903 1904 void 1905 renamecmd(from, to) 1906 const char *from, *to; 1907 { 1908 char *p = NULL; 1909 1910 if (rename(from, to) < 0) { 1911 p = strerror(errno); 1912 perror_reply(550, "rename"); 1913 } else 1914 ack("RNTO"); 1915 logcmd("rename", -1, from, to, NULL, p); 1916 } 1917 1918 static void 1919 dolog(who) 1920 struct sockaddr *who; 1921 { 1922 int error; 1923 error = getnameinfo(who, who->sa_len, remotehost, sizeof(remotehost), 1924 NULL, 0, 0); 1925 #ifdef HASSETPROCTITLE 1926 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1927 setproctitle(proctitle); 1928 #endif /* HASSETPROCTITLE */ 1929 1930 if (logging) 1931 syslog(LOG_INFO, "connection from %s", remotehost); 1932 } 1933 1934 /* 1935 * Record logout in wtmp file 1936 * and exit with supplied status. 1937 */ 1938 void 1939 dologout(status) 1940 int status; 1941 { 1942 /* 1943 * Prevent reception of SIGURG from resulting in a resumption 1944 * back to the main program loop. 1945 */ 1946 transflag = 0; 1947 1948 if (logged_in) { 1949 (void) seteuid((uid_t)0); 1950 logwtmp(ttyline, "", ""); 1951 #ifdef KERBEROS 1952 if (!notickets && krbtkfile_env) 1953 unlink(krbtkfile_env); 1954 #endif 1955 } 1956 /* beware of flushing buffers after a SIGPIPE */ 1957 _exit(status); 1958 } 1959 1960 static void 1961 myoob(signo) 1962 int signo; 1963 { 1964 char *cp; 1965 1966 /* only process if transfer occurring */ 1967 if (!transflag) 1968 return; 1969 cp = tmpline; 1970 if (getline(cp, 7, stdin) == NULL) { 1971 reply(221, "You could at least say goodbye."); 1972 dologout(0); 1973 } 1974 if (strcasecmp(cp, "ABOR\r\n") == 0) { 1975 tmpline[0] = '\0'; 1976 reply(426, "Transfer aborted. Data connection closed."); 1977 reply(226, "Abort successful"); 1978 longjmp(urgcatch, 1); 1979 } 1980 if (strcasecmp(cp, "STAT\r\n") == 0) { 1981 if (file_size != (off_t) -1) 1982 reply(213, "Status: %qd of %qd byte%s transferred", 1983 (qdfmt_t)byte_count, (qdfmt_t)file_size, 1984 PLURAL(byte_count)); 1985 else 1986 reply(213, "Status: %qd byte%s transferred", 1987 (qdfmt_t)byte_count, PLURAL(byte_count)); 1988 } 1989 } 1990 1991 /* 1992 * Note: a response of 425 is not mentioned as a possible response to 1993 * the PASV command in RFC959. However, it has been blessed as 1994 * a legitimate response by Jon Postel in a telephone conversation 1995 * with Rick Adams on 25 Jan 89. 1996 */ 1997 void 1998 passive() 1999 { 2000 int len; 2001 char *p, *a; 2002 2003 pdata = socket(AF_INET, SOCK_STREAM, 0); 2004 if (pdata < 0 || !logged_in) { 2005 perror_reply(425, "Can't open passive connection"); 2006 return; 2007 } 2008 pasv_addr = ctrl_addr; 2009 pasv_addr.su_port = 0; 2010 len = pasv_addr.su_len; 2011 (void) seteuid((uid_t)0); 2012 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0) { 2013 (void) seteuid((uid_t)pw->pw_uid); 2014 goto pasv_error; 2015 } 2016 (void) seteuid((uid_t)pw->pw_uid); 2017 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2018 goto pasv_error; 2019 if (listen(pdata, 1) < 0) 2020 goto pasv_error; 2021 a = (char *) &pasv_addr.su_sin.sin_addr; 2022 p = (char *) &pasv_addr.su_port; 2023 2024 #define UC(b) (((int) b) & 0xff) 2025 2026 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 2027 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 2028 return; 2029 2030 pasv_error: 2031 (void) seteuid((uid_t)pw->pw_uid); 2032 (void) close(pdata); 2033 pdata = -1; 2034 perror_reply(425, "Can't open passive connection"); 2035 return; 2036 } 2037 2038 /* 2039 * 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...) 2040 * 229 Entering Extended Passive Mode (|||port|) 2041 */ 2042 void 2043 long_passive(char *cmd, int pf) 2044 { 2045 int len; 2046 register char *p, *a; 2047 2048 if (!logged_in) { 2049 syslog(LOG_NOTICE, "long passive but not logged in"); 2050 reply(503, "Login with USER first."); 2051 return; 2052 } 2053 2054 if (pf != PF_UNSPEC) { 2055 if (ctrl_addr.su_family != pf) { 2056 switch (ctrl_addr.su_family) { 2057 case AF_INET: 2058 pf = 1; 2059 break; 2060 case AF_INET6: 2061 pf = 2; 2062 break; 2063 default: 2064 pf = 0; 2065 break; 2066 } 2067 /* 2068 * XXX 2069 * only EPRT/EPSV ready clients will understand this 2070 */ 2071 if (strcmp(cmd, "EPSV") == 0 && pf) { 2072 reply(522, "Network protocol mismatch, " 2073 "use (%d)", pf); 2074 } else 2075 reply(501, "Network protocol mismatch"); /*XXX*/ 2076 2077 return; 2078 } 2079 } 2080 2081 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 2082 if (pdata < 0) { 2083 perror_reply(425, "Can't open passive connection"); 2084 return; 2085 } 2086 pasv_addr = ctrl_addr; 2087 pasv_addr.su_port = 0; 2088 (void) seteuid((uid_t) 0); 2089 if (bind(pdata, (struct sockaddr *) &pasv_addr, pasv_addr.su_len) < 0) { 2090 (void) seteuid((uid_t) pw->pw_uid); 2091 goto pasv_error; 2092 } 2093 (void) seteuid((uid_t) pw->pw_uid); 2094 len = pasv_addr.su_len; 2095 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2096 goto pasv_error; 2097 if (listen(pdata, 1) < 0) 2098 goto pasv_error; 2099 p = (char *) &pasv_addr.su_port; 2100 2101 #define UC(b) (((int) b) & 0xff) 2102 2103 if (strcmp(cmd, "LPSV") == 0) { 2104 switch (pasv_addr.su_family) { 2105 case AF_INET: 2106 a = (char *) &pasv_addr.su_sin.sin_addr; 2107 reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)", 2108 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2109 2, UC(p[0]), UC(p[1])); 2110 return; 2111 case AF_INET6: 2112 a = (char *) &pasv_addr.su_sin6.sin6_addr; 2113 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)", 2114 6, 16, 2115 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2116 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]), 2117 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]), 2118 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]), 2119 2, UC(p[0]), UC(p[1])); 2120 return; 2121 } 2122 #undef UC 2123 } else if (strcmp(cmd, "EPSV") == 0) { 2124 switch (pasv_addr.su_family) { 2125 case AF_INET: 2126 case AF_INET6: 2127 reply(229, "Entering Extended Passive Mode (|||%d|)", 2128 ntohs(pasv_addr.su_port)); 2129 return; 2130 } 2131 } else { 2132 /* more proper error code? */ 2133 } 2134 2135 pasv_error: 2136 (void) close(pdata); 2137 pdata = -1; 2138 perror_reply(425, "Can't open passive connection"); 2139 return; 2140 } 2141 2142 /* 2143 * Generate unique name for file with basename "local". 2144 * The file named "local" is already known to exist. 2145 * Generates failure reply on error. 2146 * 2147 * XXX this function should under go changes similar to 2148 * the mktemp(3)/mkstemp(3) changes. 2149 */ 2150 static char * 2151 gunique(local) 2152 const char *local; 2153 { 2154 static char new[MAXPATHLEN + 1]; 2155 struct stat st; 2156 int count, len; 2157 char *cp; 2158 2159 cp = strrchr(local, '/'); 2160 if (cp) 2161 *cp = '\0'; 2162 if (stat(cp ? local : ".", &st) < 0) { 2163 perror_reply(553, cp ? local : "."); 2164 return (NULL); 2165 } 2166 if (cp) 2167 *cp = '/'; 2168 (void) strcpy(new, local); 2169 len = strlen(new); 2170 cp = new + len; 2171 *cp++ = '.'; 2172 for (count = 1; count < 100; count++) { 2173 (void)snprintf(cp, sizeof(new) - len - 2, "%d", count); 2174 if (stat(new, &st) < 0) 2175 return (new); 2176 } 2177 reply(452, "Unique file name cannot be created."); 2178 return (NULL); 2179 } 2180 2181 /* 2182 * Format and send reply containing system error number. 2183 */ 2184 void 2185 perror_reply(code, string) 2186 int code; 2187 const char *string; 2188 { 2189 int save_errno; 2190 2191 save_errno = errno; 2192 reply(code, "%s: %s.", string, strerror(errno)); 2193 errno = save_errno; 2194 } 2195 2196 static char *onefile[] = { 2197 "", 2198 0 2199 }; 2200 2201 void 2202 send_file_list(whichf) 2203 const char *whichf; 2204 { 2205 struct stat st; 2206 DIR *dirp = NULL; 2207 struct dirent *dir; 2208 FILE *dout = NULL; 2209 char **dirlist, *dirname, *p; 2210 int simple = 0; 2211 int freeglob = 0; 2212 glob_t gl; 2213 off_t b; 2214 2215 #ifdef __GNUC__ 2216 (void) &dout; 2217 (void) &dirlist; 2218 (void) &simple; 2219 (void) &freeglob; 2220 #endif 2221 2222 p = NULL; 2223 if (strpbrk(whichf, "~{[*?") != NULL) { 2224 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 2225 2226 memset(&gl, 0, sizeof(gl)); 2227 freeglob = 1; 2228 if (glob(whichf, flags, 0, &gl)) { 2229 reply(550, "not found"); 2230 goto out; 2231 } else if (gl.gl_pathc == 0) { 2232 errno = ENOENT; 2233 perror_reply(550, whichf); 2234 goto out; 2235 } 2236 dirlist = gl.gl_pathv; 2237 } else { 2238 p = xstrdup(whichf); 2239 onefile[0] = p; 2240 dirlist = onefile; 2241 simple = 1; 2242 } 2243 /* XXX: } for vi sm */ 2244 2245 if (setjmp(urgcatch)) { 2246 transflag = 0; 2247 goto out; 2248 } 2249 while ((dirname = *dirlist++) != NULL) { 2250 int trailingslash = 0; 2251 2252 if (stat(dirname, &st) < 0) { 2253 /* 2254 * If user typed "ls -l", etc, and the client 2255 * used NLST, do what the user meant. 2256 */ 2257 if (dirname[0] == '-' && *dirlist == NULL && 2258 transflag == 0) { 2259 retrieve("/bin/ls %s", dirname); 2260 goto out; 2261 } 2262 perror_reply(550, whichf); 2263 if (dout != NULL) { 2264 (void) fclose(dout); 2265 transflag = 0; 2266 data = -1; 2267 pdata = -1; 2268 } 2269 goto out; 2270 } 2271 2272 if (S_ISREG(st.st_mode)) { 2273 if (dout == NULL) { 2274 dout = dataconn("file list", (off_t)-1, "w"); 2275 if (dout == NULL) 2276 goto out; 2277 transflag++; 2278 } 2279 b = fprintf(dout, "%s%s\n", dirname, 2280 type == TYPE_A ? "\r" : ""); 2281 total_bytes += b; 2282 total_bytes_out += b; 2283 byte_count += strlen(dirname) + 1; 2284 continue; 2285 } else if (!S_ISDIR(st.st_mode)) 2286 continue; 2287 2288 if (dirname[strlen(dirname) - 1] == '/') 2289 trailingslash++; 2290 2291 if ((dirp = opendir(dirname)) == NULL) 2292 continue; 2293 2294 while ((dir = readdir(dirp)) != NULL) { 2295 char nbuf[MAXPATHLEN + 1]; 2296 2297 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 2298 continue; 2299 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 2300 dir->d_namlen == 2) 2301 continue; 2302 2303 (void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname, 2304 trailingslash ? "" : "/", dir->d_name); 2305 2306 /* 2307 * We have to do a stat to ensure it's 2308 * not a directory or special file. 2309 */ 2310 if (simple || (stat(nbuf, &st) == 0 && 2311 S_ISREG(st.st_mode))) { 2312 char *p; 2313 2314 if (dout == NULL) { 2315 dout = dataconn("file list", (off_t)-1, 2316 "w"); 2317 if (dout == NULL) 2318 goto out; 2319 transflag++; 2320 } 2321 p = nbuf; 2322 if (nbuf[0] == '.' && nbuf[1] == '/') 2323 p = &nbuf[2]; 2324 b = fprintf(dout, "%s%s\n", p, 2325 type == TYPE_A ? "\r" : ""); 2326 total_bytes += b; 2327 total_bytes_out += b; 2328 byte_count += strlen(nbuf) + 1; 2329 } 2330 } 2331 (void) closedir(dirp); 2332 } 2333 2334 if (dout == NULL) 2335 reply(550, "No files found."); 2336 else if (ferror(dout) != 0) 2337 perror_reply(550, "Data connection"); 2338 else 2339 reply(226, "Transfer complete."); 2340 2341 transflag = 0; 2342 if (dout != NULL) 2343 (void) fclose(dout); 2344 data = -1; 2345 pdata = -1; 2346 out: 2347 total_xfers++; 2348 total_xfers_out++; 2349 if (p) 2350 free(p); 2351 if (freeglob) 2352 globfree(&gl); 2353 } 2354 2355 char * 2356 conffilename(s) 2357 const char *s; 2358 { 2359 static char filename[MAXPATHLEN + 1]; 2360 2361 (void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s); 2362 return filename; 2363 } 2364 2365 /* 2366 * logcmd -- 2367 * based on the arguments, syslog a message: 2368 * if bytes != -1 "<command> <file1> = <bytes> bytes" 2369 * else if file2 != NULL "<command> <file1> <file2>" 2370 * else "<command> <file1>" 2371 * if elapsed != NULL, append "in xxx.yyy seconds" 2372 * if error != NULL, append ": " + error 2373 */ 2374 2375 void 2376 logcmd(command, bytes, file1, file2, elapsed, error) 2377 const char *command; 2378 off_t bytes; 2379 const char *file1; 2380 const char *file2; 2381 const struct timeval *elapsed; 2382 const char *error; 2383 { 2384 char buf[MAXPATHLEN + 100], realfile[MAXPATHLEN + 1]; 2385 const char *p; 2386 size_t len; 2387 2388 if (logging <=1) 2389 return; 2390 2391 if ((p = realpath(file1, realfile)) == NULL) { 2392 #if 0 /* XXX: too noisy */ 2393 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2394 realfile, strerror(errno)); 2395 #endif 2396 p = file1; 2397 } 2398 len = snprintf(buf, sizeof(buf), "%s %s", command, p); 2399 2400 if (bytes != (off_t)-1) { 2401 len += snprintf(buf + len, sizeof(buf) - len, 2402 " = %qd byte%s", (qdfmt_t) bytes, PLURAL(bytes)); 2403 } else if (file2 != NULL) { 2404 if ((p = realpath(file2, realfile)) == NULL) { 2405 #if 0 /* XXX: too noisy */ 2406 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2407 realfile, strerror(errno)); 2408 #endif 2409 p = file2; 2410 } 2411 len += snprintf(buf + len, sizeof(buf) - len, " %s", p); 2412 } 2413 2414 if (elapsed != NULL) { 2415 len += snprintf(buf + len, sizeof(buf) - len, 2416 " in %ld.%.03d seconds", elapsed->tv_sec, 2417 (int)(elapsed->tv_usec / 1000)); 2418 } 2419 2420 if (error != NULL) 2421 len += snprintf(buf + len, sizeof(buf) - len, ": %s", error); 2422 2423 syslog(LOG_INFO, "%s", buf); 2424 } 2425 2426 char * 2427 xstrdup(s) 2428 const char *s; 2429 { 2430 char *new = strdup(s); 2431 2432 if (new == NULL) 2433 fatal("Local resource failure: malloc"); 2434 /* NOTREACHED */ 2435 return (new); 2436 } 2437
Indexes created Wed Sep 24 05:09:52 GMT 2025