ftpd.c revision 1.115
1 /* $NetBSD: ftpd.c,v 1.115 2000/11/30 02:59:11 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1985, 1988, 1990, 1992, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by the University of 54 * California, Berkeley and its contributors. 55 * 4. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 */ 71 72 /* 73 * Copyright (C) 1997 and 1998 WIDE Project. 74 * All rights reserved. 75 * 76 * Redistribution and use in source and binary forms, with or without 77 * modification, are permitted provided that the following conditions 78 * are met: 79 * 1. Redistributions of source code must retain the above copyright 80 * notice, this list of conditions and the following disclaimer. 81 * 2. Redistributions in binary form must reproduce the above copyright 82 * notice, this list of conditions and the following disclaimer in the 83 * documentation and/or other materials provided with the distribution. 84 * 3. Neither the name of the project nor the names of its contributors 85 * may be used to endorse or promote products derived from this software 86 * without specific prior written permission. 87 * 88 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 89 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 90 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 91 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 92 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 93 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 94 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 95 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 96 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 97 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 98 * 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 1.115 2000/11/30 02:59:11 lukem 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 <grp.h> 142 #include <limits.h> 143 #include <netdb.h> 144 #include <pwd.h> 145 #include <setjmp.h> 146 #include <signal.h> 147 #include <stdarg.h> 148 #include <stdio.h> 149 #include <stdlib.h> 150 #include <string.h> 151 #include <syslog.h> 152 #include <time.h> 153 #include <unistd.h> 154 #include <util.h> 155 #include <utmp.h> 156 #ifdef SKEY 157 #include <skey.h> 158 #endif 159 #ifdef KERBEROS5 160 #include <com_err.h> 161 #include <krb5/krb5.h> 162 #endif 163 164 #define GLOBAL 165 #include "extern.h" 166 #include "pathnames.h" 167 #include "version.h" 168 169 int data; 170 jmp_buf urgcatch; 171 struct passwd *pw; 172 int sflag; 173 int stru; /* avoid C keyword */ 174 int mode; 175 int dataport; /* use specific data port */ 176 int dopidfile; /* maintain pid file */ 177 int doutmp; /* update utmp file */ 178 int dowtmp; /* update wtmp file */ 179 int dropprivs; /* if privileges should or have been dropped */ 180 int mapped; /* IPv4 connection on AF_INET6 socket */ 181 off_t file_size; 182 off_t byte_count; 183 static char ttyline[20]; 184 static struct utmp utmp; /* for utmp */ 185 186 static const char *anondir = NULL; 187 static const char *confdir = NULL; 188 189 #if defined(KERBEROS) || defined(KERBEROS5) 190 int has_ccache = 0; 191 int notickets = 1; 192 char *krbtkfile_env = NULL; 193 char *tty = ttyline; 194 int login_krb5_forwardable_tgt = 0; 195 #endif 196 197 int epsvall = 0; 198 199 /* 200 * Timeout intervals for retrying connections 201 * to hosts that don't accept PORT cmds. This 202 * is a kludge, but given the problems with TCP... 203 */ 204 #define SWAITMAX 90 /* wait at most 90 seconds */ 205 #define SWAITINT 5 /* interval between retries */ 206 207 int swaitmax = SWAITMAX; 208 int swaitint = SWAITINT; 209 210 static int bind_pasv_addr(void); 211 static int checkuser(const char *, const char *, int, int, char **); 212 static int checkaccess(const char *); 213 static void dolog(struct sockinet *); 214 static void end_login(void); 215 static FILE *getdatasock(const char *); 216 static char *gunique(const char *); 217 static void lostconn(int); 218 static void myoob(int); 219 static int receive_data(FILE *, FILE *); 220 static int send_data(FILE *, FILE *, off_t, int); 221 static int valid_passwd(const struct passwd *, const char *); 222 static struct passwd *sgetpwnam(const char *); 223 224 int main(int, char *[]); 225 226 #if defined(KERBEROS) 227 int klogin(struct passwd *, char *, char *, char *); 228 void kdestroy(void); 229 #endif 230 #if defined(KERBEROS5) 231 int k5login(struct passwd *, char *, char *, char *); 232 void k5destroy(void); 233 #endif 234 235 int 236 main(int argc, char *argv[]) 237 { 238 int addrlen, ch, on = 1, tos, keepalive; 239 #ifdef KERBEROS5 240 krb5_error_code kerror; 241 #endif 242 char *p; 243 244 connections = 1; 245 debug = 0; 246 logging = 0; 247 pdata = -1; 248 sflag = 0; 249 dataport = 0; 250 dopidfile = 1; /* default: DO use a pid file to count users */ 251 doutmp = 0; /* default: don't log to utmp */ 252 dowtmp = 1; /* default: DO log to wtmp */ 253 dropprivs = 0; 254 mapped = 0; 255 usedefault = 1; 256 emailaddr = NULL; 257 hostname[0] = '\0'; 258 homedir[0] = '\0'; 259 gidcount = 0; 260 version = FTPD_VERSION; 261 262 /* 263 * LOG_NDELAY sets up the logging connection immediately, 264 * necessary for anonymous ftp's that chroot and can't do it later. 265 */ 266 openlog("ftpd", LOG_PID | LOG_NDELAY, LOG_FTP); 267 268 while ((ch = getopt(argc, argv, "a:c:C:de:h:HlP:qQrst:T:uUvV:wW")) 269 != -1) { 270 switch (ch) { 271 case 'a': 272 anondir = optarg; 273 break; 274 275 case 'c': 276 confdir = optarg; 277 break; 278 279 case 'C': 280 pw = sgetpwnam(optarg); 281 exit(checkaccess(optarg) ? 0 : 1); 282 /* NOTREACHED */ 283 284 case 'd': 285 case 'v': /* deprecated */ 286 debug = 1; 287 break; 288 289 case 'e': 290 emailaddr = optarg; 291 break; 292 293 case 'h': 294 strlcpy(hostname, optarg, sizeof(hostname)); 295 break; 296 297 case 'H': 298 if (gethostname(hostname, sizeof(hostname)) == -1) 299 hostname[0] = '\0'; 300 hostname[sizeof(hostname) - 1] = '\0'; 301 break; 302 303 case 'l': 304 logging++; /* > 1 == extra logging */ 305 break; 306 307 case 'P': 308 dataport = (int)strtol(optarg, &p, 10); 309 if (*p != '\0' || dataport < IPPORT_RESERVED || 310 dataport > IPPORT_ANONMAX) { 311 syslog(LOG_WARNING, "Invalid dataport %s", 312 optarg); 313 dataport = 0; 314 } 315 break; 316 317 case 'q': 318 dopidfile = 1; 319 break; 320 321 case 'Q': 322 dopidfile = 0; 323 break; 324 325 case 'r': 326 dropprivs = 1; 327 break; 328 329 case 's': 330 sflag = 1; 331 break; 332 333 case 't': 334 case 'T': 335 syslog(LOG_ERR, 336 "-%c has been deprecated in favour of ftpd.conf", 337 ch); 338 break; 339 340 case 'u': 341 doutmp = 1; 342 break; 343 344 case 'U': 345 doutmp = 0; 346 break; 347 348 case 'V': 349 if (EMPTYSTR(optarg) || strcmp(optarg, "-") == 0) 350 version = NULL; 351 else 352 version = xstrdup(optarg); 353 break; 354 355 case 'w': 356 dowtmp = 1; 357 break; 358 359 case 'W': 360 dowtmp = 0; 361 break; 362 363 default: 364 if (optopt == 'a' || optopt == 'C') 365 exit(1); 366 syslog(LOG_ERR, "unknown flag -%c ignored", optopt); 367 break; 368 } 369 } 370 if (EMPTYSTR(confdir)) 371 confdir = _DEFAULT_CONFDIR; 372 373 memset((char *)&his_addr, 0, sizeof (his_addr)); 374 addrlen = sizeof(his_addr.si_su); 375 if (getpeername(0, (struct sockaddr *)&his_addr.si_su, &addrlen) < 0) { 376 syslog(LOG_ERR, "getpeername (%s): %m",argv[0]); 377 exit(1); 378 } 379 his_addr.su_len = addrlen; 380 memset((char *)&ctrl_addr, 0, sizeof (ctrl_addr)); 381 addrlen = sizeof(ctrl_addr.si_su); 382 if (getsockname(0, (struct sockaddr *)&ctrl_addr, &addrlen) < 0) { 383 syslog(LOG_ERR, "getsockname (%s): %m",argv[0]); 384 exit(1); 385 } 386 ctrl_addr.su_len = addrlen; 387 #ifdef INET6 388 if (his_addr.su_family == AF_INET6 389 && IN6_IS_ADDR_V4MAPPED(&his_addr.su_6addr)) { 390 #if 1 391 /* 392 * IPv4 control connection arrived to AF_INET6 socket. 393 * I hate to do this, but this is the easiest solution. 394 * 395 * The assumption is untrue on SIIT environment. 396 */ 397 struct sockinet tmp_addr; 398 const int off = sizeof(struct in6_addr) - sizeof(struct in_addr); 399 400 tmp_addr = his_addr; 401 memset(&his_addr, 0, sizeof(his_addr)); 402 his_addr.su_family = AF_INET; 403 his_addr.su_len = sizeof(his_addr.si_su.su_sin); 404 memcpy(&his_addr.su_addr, &tmp_addr.su_6addr.s6_addr[off], 405 sizeof(his_addr.su_addr)); 406 his_addr.su_port = tmp_addr.su_port; 407 408 tmp_addr = ctrl_addr; 409 memset(&ctrl_addr, 0, sizeof(ctrl_addr)); 410 ctrl_addr.su_family = AF_INET; 411 ctrl_addr.su_len = sizeof(ctrl_addr.si_su.su_sin); 412 memcpy(&ctrl_addr.su_addr, &tmp_addr.su_6addr.s6_addr[off], 413 sizeof(ctrl_addr.su_addr)); 414 ctrl_addr.su_port = tmp_addr.su_port; 415 #else 416 while (fgets(line, sizeof(line), fd) != NULL) { 417 if ((cp = strchr(line, '\n')) != NULL) 418 *cp = '\0'; 419 reply(-530, "%s", line); 420 } 421 (void) fflush(stdout); 422 (void) fclose(fd); 423 reply(530, 424 "Connection from IPv4 mapped address is not supported."); 425 exit(0); 426 #endif 427 428 mapped = 1; 429 } else 430 #endif /* INET6 */ 431 mapped = 0; 432 #ifdef IP_TOS 433 if (!mapped && his_addr.su_family == AF_INET) { 434 tos = IPTOS_LOWDELAY; 435 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&tos, 436 sizeof(int)) < 0) 437 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 438 } 439 #endif 440 /* if the hostname hasn't been given, attempt to determine it */ 441 if (hostname[0] == '\0') { 442 if (getnameinfo((struct sockaddr *)&ctrl_addr.si_su, 443 ctrl_addr.su_len, hostname, sizeof(hostname), NULL, 0, 0) 444 != 0) 445 (void)gethostname(hostname, sizeof(hostname)); 446 hostname[sizeof(hostname) - 1] = '\0'; 447 } 448 449 /* set this here so klogin can use it... */ 450 (void)snprintf(ttyline, sizeof(ttyline), "ftp%d", getpid()); 451 452 (void) freopen(_PATH_DEVNULL, "w", stderr); 453 (void) signal(SIGPIPE, lostconn); 454 (void) signal(SIGCHLD, SIG_IGN); 455 if (signal(SIGURG, myoob) == SIG_ERR) 456 syslog(LOG_ERR, "signal: %m"); 457 458 /* Try to handle urgent data inline */ 459 #ifdef SO_OOBINLINE 460 if (setsockopt(0, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) < 0) 461 syslog(LOG_ERR, "setsockopt: %m"); 462 #endif 463 /* Set keepalives on the socket to detect dropped connections. */ 464 #ifdef SO_KEEPALIVE 465 keepalive = 1; 466 if (setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive, 467 sizeof(int)) < 0) 468 syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); 469 #endif 470 471 #ifdef F_SETOWN 472 if (fcntl(fileno(stdin), F_SETOWN, getpid()) == -1) 473 syslog(LOG_ERR, "fcntl F_SETOWN: %m"); 474 #endif 475 dolog(&his_addr); 476 /* 477 * Set up default state 478 */ 479 data = -1; 480 type = TYPE_A; 481 form = FORM_N; 482 stru = STRU_F; 483 mode = MODE_S; 484 tmpline[0] = '\0'; 485 hasyyerrored = 0; 486 487 #ifdef KERBEROS5 488 kerror = krb5_init_context(&kcontext); 489 if (kerror) { 490 syslog(LOG_NOTICE, "%s when initializing Kerberos context", 491 error_message(kerror)); 492 exit(0); 493 } 494 #endif /* KERBEROS5 */ 495 496 init_curclass(); 497 curclass.timeout = 300; /* 5 minutes, as per login(1) */ 498 curclass.type = CLASS_REAL; 499 500 /* If logins are disabled, print out the message. */ 501 if (display_file(_PATH_NOLOGIN, 530)) { 502 reply(530, "System not available."); 503 exit(0); 504 } 505 (void)display_file(conffilename(_PATH_FTPWELCOME), 220); 506 /* reply(220,) must follow */ 507 if (EMPTYSTR(version)) 508 reply(220, "%s FTP server ready.", hostname); 509 else 510 reply(220, "%s FTP server (%s) ready.", hostname, version); 511 512 (void) setjmp(errcatch); 513 for (;;) 514 (void) yyparse(); 515 /* NOTREACHED */ 516 } 517 518 static void 519 lostconn(int signo) 520 { 521 522 if (debug) 523 syslog(LOG_DEBUG, "lost connection"); 524 dologout(1); 525 } 526 527 /* 528 * Save the result of a getpwnam. Used for USER command, since 529 * the data returned must not be clobbered by any other command 530 * (e.g., globbing). 531 */ 532 static struct passwd * 533 sgetpwnam(const char *name) 534 { 535 static struct passwd save; 536 struct passwd *p; 537 538 if ((p = getpwnam(name)) == NULL) 539 return (p); 540 if (save.pw_name) { 541 free((char *)save.pw_name); 542 memset(save.pw_passwd, 0, strlen(save.pw_passwd)); 543 free((char *)save.pw_passwd); 544 free((char *)save.pw_gecos); 545 free((char *)save.pw_dir); 546 free((char *)save.pw_shell); 547 } 548 save = *p; 549 save.pw_name = xstrdup(p->pw_name); 550 save.pw_passwd = xstrdup(p->pw_passwd); 551 save.pw_gecos = xstrdup(p->pw_gecos); 552 save.pw_dir = xstrdup(p->pw_dir); 553 save.pw_shell = xstrdup(p->pw_shell); 554 return (&save); 555 } 556 557 static int login_attempts; /* number of failed login attempts */ 558 static int askpasswd; /* had user command, ask for passwd */ 559 static char curname[10]; /* current USER name */ 560 561 /* 562 * USER command. 563 * Sets global passwd pointer pw if named account exists and is acceptable; 564 * sets askpasswd if a PASS command is expected. If logged in previously, 565 * need to reset state. If name is "ftp" or "anonymous", the name is not in 566 * _PATH_FTPUSERS, and ftp account exists, set guest and pw, then just return. 567 * If account doesn't exist, ask for passwd anyway. Otherwise, check user 568 * requesting login privileges. Disallow anyone who does not have a standard 569 * shell as returned by getusershell(). Disallow anyone mentioned in the file 570 * _PATH_FTPUSERS to allow people such as root and uucp to be avoided. 571 */ 572 void 573 user(const char *name) 574 { 575 if (logged_in) { 576 switch (curclass.type) { 577 case CLASS_GUEST: 578 reply(530, "Can't change user from guest login."); 579 return; 580 case CLASS_CHROOT: 581 reply(530, "Can't change user from chroot user."); 582 return; 583 case CLASS_REAL: 584 if (dropprivs) { 585 reply(530, "Can't change user."); 586 return; 587 } 588 end_login(); 589 break; 590 default: 591 abort(); 592 } 593 } 594 595 #if defined(KERBEROS) 596 kdestroy(); 597 #endif 598 #if defined(KERBEROS5) 599 k5destroy(); 600 #endif 601 602 curclass.type = CLASS_REAL; 603 if (strcmp(name, "ftp") == 0 || strcmp(name, "anonymous") == 0) { 604 /* need `pw' setup for checkaccess() and checkuser () */ 605 if ((pw = sgetpwnam("ftp")) == NULL) 606 reply(530, "User %s unknown.", name); 607 else if (! checkaccess("ftp") || ! checkaccess("anonymous")) 608 reply(530, "User %s access denied.", name); 609 else { 610 curclass.type = CLASS_GUEST; 611 askpasswd = 1; 612 reply(331, 613 "Guest login ok, type your name as password."); 614 } 615 if (!askpasswd && logging) 616 syslog(LOG_NOTICE, 617 "ANONYMOUS FTP LOGIN REFUSED FROM %s", remotehost); 618 return; 619 } 620 621 pw = sgetpwnam(name); 622 if (logging) 623 strlcpy(curname, name, sizeof(curname)); 624 625 #ifdef SKEY 626 if (skey_haskey(name) == 0) { 627 const char *myskey; 628 629 myskey = skey_keyinfo(name); 630 reply(331, "Password [%s] required for %s.", 631 myskey ? myskey : "error getting challenge", name); 632 } else 633 #endif 634 reply(331, "Password required for %s.", name); 635 636 askpasswd = 1; 637 /* 638 * Delay before reading passwd after first failed 639 * attempt to slow down passwd-guessing programs. 640 */ 641 if (login_attempts) 642 sleep((unsigned) login_attempts); 643 } 644 645 /* 646 * Determine whether something is to happen (allow access, chroot) 647 * for a user. Each line is a shell-style glob followed by 648 * `yes' or `no'. 649 * 650 * For backward compatability, `allow' and `deny' are synonymns 651 * for `yes' and `no', respectively. 652 * 653 * Each glob is matched against the username in turn, and the first 654 * match found is used. If no match is found, the result is the 655 * argument `def'. If a match is found but without and explicit 656 * `yes'/`no', the result is the opposite of def. 657 * 658 * If the file doesn't exist at all, the result is the argument 659 * `nofile' 660 * 661 * Any line starting with `#' is considered a comment and ignored. 662 * 663 * Returns 0 if the user is denied, or 1 if they are allowed. 664 * 665 * NOTE: needs struct passwd *pw setup before use. 666 */ 667 int 668 checkuser(const char *fname, const char *name, int def, int nofile, 669 char **retclass) 670 { 671 FILE *fd; 672 int retval; 673 char *glob, *perm, *class, *buf, *p; 674 size_t len, line; 675 676 retval = def; 677 if (retclass != NULL) 678 *retclass = NULL; 679 if ((fd = fopen(conffilename(fname), "r")) == NULL) 680 return nofile; 681 682 line = 0; 683 for (; 684 (buf = fparseln(fd, &len, &line, NULL, FPARSELN_UNESCCOMM | 685 FPARSELN_UNESCCONT | FPARSELN_UNESCESC)) != NULL; 686 free(buf), buf = NULL) { 687 glob = perm = class = NULL; 688 p = buf; 689 if (len < 1) 690 continue; 691 if (p[len - 1] == '\n') 692 p[--len] = '\0'; 693 if (EMPTYSTR(p)) 694 continue; 695 696 NEXTWORD(p, glob); 697 NEXTWORD(p, perm); 698 NEXTWORD(p, class); 699 if (EMPTYSTR(glob)) 700 continue; 701 if (!EMPTYSTR(class)) { 702 if (strcasecmp(class, "all") == 0 || 703 strcasecmp(class, "none") == 0) { 704 syslog(LOG_WARNING, 705 "%s line %d: illegal user-defined class `%s' - skipping entry", 706 fname, (int)line, class); 707 continue; 708 } 709 } 710 711 /* have a host specifier */ 712 if ((p = strchr(glob, '@')) != NULL) { 713 unsigned long net, mask, addr; 714 int bits; 715 716 *p++ = '\0'; 717 /* check against network or CIDR */ 718 if (isdigit(*p) && 719 (bits = inet_net_pton(AF_INET, p, 720 &net, sizeof(net))) != -1) { 721 net = ntohl(net); 722 mask = 0xffffffffU << (32 - bits); 723 addr = ntohl(his_addr.su_addr.s_addr); 724 if ((addr & mask) != net) 725 continue; 726 727 /* check against hostname glob */ 728 } else if (fnmatch(p, remotehost, 0) != 0) 729 continue; 730 } 731 732 /* have a group specifier */ 733 if ((p = strchr(glob, ':')) != NULL) { 734 gid_t *groups, *ng; 735 int gsize, i, found; 736 737 *p++ = '\0'; 738 groups = NULL; 739 gsize = 16; 740 do { 741 ng = realloc(groups, gsize * sizeof(gid_t)); 742 if (ng == NULL) 743 fatal( 744 "Local resource failure: realloc"); 745 groups = ng; 746 } while (getgrouplist(pw->pw_name, pw->pw_gid, 747 groups, &gsize) == -1); 748 found = 0; 749 for (i = 0; i < gsize; i++) { 750 struct group *g; 751 752 if ((g = getgrgid(groups[i])) == NULL) 753 continue; 754 if (fnmatch(p, g->gr_name, 0) == 0) { 755 found = 1; 756 break; 757 } 758 } 759 free(groups); 760 if (!found) 761 continue; 762 } 763 764 /* check against username glob */ 765 if (fnmatch(glob, name, 0) != 0) 766 continue; 767 768 if (perm != NULL && 769 ((strcasecmp(perm, "allow") == 0) || 770 (strcasecmp(perm, "yes") == 0))) 771 retval = 1; 772 else if (perm != NULL && 773 ((strcasecmp(perm, "deny") == 0) || 774 (strcasecmp(perm, "no") == 0))) 775 retval = 0; 776 else 777 retval = !def; 778 if (!EMPTYSTR(class) && retclass != NULL) 779 *retclass = xstrdup(class); 780 free(buf); 781 break; 782 } 783 (void) fclose(fd); 784 return (retval); 785 } 786 787 /* 788 * Check if user is allowed by /etc/ftpusers 789 * returns 1 for yes, 0 for no 790 * 791 * NOTE: needs struct passwd *pw setup (for checkuser()) 792 */ 793 int 794 checkaccess(const char *name) 795 { 796 797 return (checkuser(_PATH_FTPUSERS, name, 1, 0, NULL)); 798 } 799 800 /* 801 * Terminate login as previous user, if any, resetting state; 802 * used when USER command is given or login fails. 803 */ 804 static void 805 end_login(void) 806 { 807 808 if (logged_in) { 809 if (dowtmp) 810 logwtmp(ttyline, "", ""); 811 if (doutmp) 812 logout(utmp.ut_line); 813 } 814 /* reset login state */ 815 (void) seteuid((uid_t)0); 816 pw = NULL; 817 logged_in = 0; 818 quietmessages = 0; 819 gidcount = 0; 820 curclass.type = CLASS_REAL; 821 } 822 823 void 824 pass(const char *passwd) 825 { 826 int rval; 827 const char *cp, *shell; 828 char *class, root[MAXPATHLEN]; 829 830 class = NULL; 831 if (logged_in || askpasswd == 0) { 832 reply(503, "Login with USER first."); 833 return; 834 } 835 askpasswd = 0; 836 if (curclass.type != CLASS_GUEST) { 837 /* "ftp" is the only account allowed with no password */ 838 if (pw == NULL) { 839 rval = 1; /* failure below */ 840 goto skip; 841 } 842 #if defined(KERBEROS) 843 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 844 rval = 0; 845 goto skip; 846 } 847 #endif 848 #if defined(KERBEROS5) 849 if (k5login(pw, "", hostname, (char *)passwd) == 0) { 850 rval = 0; 851 goto skip; 852 } 853 #endif 854 #ifdef SKEY 855 if (skey_haskey(pw->pw_name) == 0) { 856 char *p; 857 int r; 858 859 p = xstrdup(passwd); 860 r = skey_passcheck(pw->pw_name, p); 861 free(p); 862 if (r != -1) { 863 rval = 0; 864 goto skip; 865 } 866 } 867 #endif 868 if (!sflag && valid_passwd(pw, passwd)) { 869 rval = 0; 870 goto skip; 871 } 872 rval = 1; 873 874 skip: 875 if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire) 876 rval = 2; 877 878 /* 879 * If rval > 0, the user failed the authentication check 880 * above. If rval == 0, either Kerberos or local 881 * authentication succeeded. 882 */ 883 if (rval) { 884 reply(530, "%s", rval == 2 ? "Password expired." : 885 "Login incorrect."); 886 if (logging) { 887 syslog(LOG_NOTICE, 888 "FTP LOGIN FAILED FROM %s", remotehost); 889 syslog(LOG_AUTHPRIV | LOG_NOTICE, 890 "FTP LOGIN FAILED FROM %s, %s", 891 remotehost, curname); 892 } 893 pw = NULL; 894 if (login_attempts++ >= 5) { 895 syslog(LOG_NOTICE, 896 "repeated login failures from %s", 897 remotehost); 898 exit(0); 899 } 900 return; 901 } 902 } 903 904 /* password ok; see if anything else prevents login */ 905 if (! checkuser(_PATH_FTPUSERS, pw->pw_name, 1, 0, &class)) { 906 reply(530, "User %s may not use FTP.", pw->pw_name); 907 if (logging) 908 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 909 remotehost, pw->pw_name); 910 goto bad; 911 } 912 /* if not guest user, check for valid shell */ 913 if ((shell = pw->pw_shell) == NULL || *shell == 0) 914 shell = _PATH_BSHELL; 915 while ((cp = getusershell()) != NULL) 916 if (strcmp(cp, shell) == 0) 917 break; 918 endusershell(); 919 if (cp == NULL && curclass.type != CLASS_GUEST) { 920 reply(530, "User %s may not use FTP.", pw->pw_name); 921 if (logging) 922 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 923 remotehost, pw->pw_name); 924 goto bad; 925 } 926 927 login_attempts = 0; /* this time successful */ 928 if (setegid((gid_t)pw->pw_gid) < 0) { 929 reply(550, "Can't set gid."); 930 goto bad; 931 } 932 (void) initgroups(pw->pw_name, pw->pw_gid); 933 /* cache groups for cmds.c::matchgroup() */ 934 gidcount = getgroups(sizeof(gidlist), gidlist); 935 936 /* open wtmp before chroot */ 937 if (dowtmp) 938 logwtmp(ttyline, pw->pw_name, remotehost); 939 940 /* open utmp before chroot */ 941 if (doutmp) { 942 memset((void *)&utmp, 0, sizeof(utmp)); 943 (void)time(&utmp.ut_time); 944 (void)strncpy(utmp.ut_name, pw->pw_name, sizeof(utmp.ut_name)); 945 (void)strncpy(utmp.ut_host, remotehost, sizeof(utmp.ut_host)); 946 (void)strncpy(utmp.ut_line, ttyline, sizeof(utmp.ut_line)); 947 login(&utmp); 948 } 949 950 logged_in = 1; 951 952 /* check user in /etc/ftpchroot */ 953 if (checkuser(_PATH_FTPCHROOT, pw->pw_name, 0, 0, NULL)) { 954 if (curclass.type == CLASS_GUEST) { 955 syslog(LOG_NOTICE, 956 "Can't change guest user to chroot class; remove entry in %s", 957 _PATH_FTPCHROOT); 958 exit(1); 959 } 960 curclass.type = CLASS_CHROOT; 961 } 962 if (class == NULL) { 963 switch (curclass.type) { 964 case CLASS_GUEST: 965 class = xstrdup("guest"); 966 break; 967 case CLASS_CHROOT: 968 class = xstrdup("chroot"); 969 break; 970 case CLASS_REAL: 971 class = xstrdup("real"); 972 break; 973 default: 974 abort(); 975 } 976 } 977 978 /* parse ftpd.conf, setting up various parameters */ 979 parse_conf(class); 980 connections = 1; 981 if (dopidfile) 982 count_users(); 983 if (curclass.limit != -1 && connections > curclass.limit) { 984 if (! EMPTYSTR(curclass.limitfile)) 985 (void)display_file(conffilename(curclass.limitfile), 986 530); 987 reply(530, 988 "User %s access denied, connection limit of %d reached.", 989 pw->pw_name, curclass.limit); 990 syslog(LOG_NOTICE, 991 "Maximum connection limit of %d for class %s reached, login refused for %s", 992 curclass.limit, curclass.classname, pw->pw_name); 993 goto bad; 994 } 995 996 homedir[0] = '/'; 997 switch (curclass.type) { 998 case CLASS_GUEST: 999 /* 1000 * We MUST do a chdir() after the chroot. Otherwise 1001 * the old current directory will be accessible as "." 1002 * outside the new root! 1003 */ 1004 format_path(root, 1005 curclass.chroot ? curclass.chroot : 1006 anondir ? anondir : 1007 pw->pw_dir); 1008 format_path(homedir, 1009 curclass.homedir ? curclass.homedir : 1010 "/"); 1011 if (EMPTYSTR(homedir)) 1012 homedir[0] = '/'; 1013 if (EMPTYSTR(root) || chroot(root) < 0) { 1014 syslog(LOG_NOTICE, 1015 "GUEST user %s: can't chroot to %s: %m", 1016 pw->pw_name, root); 1017 goto bad_guest; 1018 } 1019 if (chdir(homedir) < 0) { 1020 syslog(LOG_NOTICE, 1021 "GUEST user %s: can't chdir to %s: %m", 1022 pw->pw_name, homedir); 1023 bad_guest: 1024 reply(550, "Can't set guest privileges."); 1025 goto bad; 1026 } 1027 break; 1028 case CLASS_CHROOT: 1029 format_path(root, 1030 curclass.chroot ? curclass.chroot : 1031 pw->pw_dir); 1032 format_path(homedir, 1033 curclass.homedir ? curclass.homedir : 1034 "/"); 1035 if (EMPTYSTR(homedir)) 1036 homedir[0] = '/'; 1037 if (EMPTYSTR(root) || chroot(root) < 0) { 1038 syslog(LOG_NOTICE, 1039 "CHROOT user %s: can't chroot to %s: %m", 1040 pw->pw_name, root); 1041 goto bad_chroot; 1042 } 1043 if (chdir(homedir) < 0) { 1044 syslog(LOG_NOTICE, 1045 "CHROOT user %s: can't chdir to %s: %m", 1046 pw->pw_name, homedir); 1047 bad_chroot: 1048 reply(550, "Can't change root."); 1049 goto bad; 1050 } 1051 break; 1052 case CLASS_REAL: 1053 format_path(homedir, 1054 curclass.homedir ? curclass.homedir : 1055 pw->pw_dir); 1056 if (EMPTYSTR(homedir) || chdir(homedir) < 0) { 1057 if (chdir("/") < 0) { 1058 syslog(LOG_NOTICE, 1059 "REAL user %s: can't chdir to %s: %m", 1060 pw->pw_name, 1061 !EMPTYSTR(homedir) ? homedir : "/"); 1062 reply(530, 1063 "User %s: can't change directory to %s.", 1064 pw->pw_name, 1065 !EMPTYSTR(homedir) ? homedir : "/"); 1066 goto bad; 1067 } else { 1068 reply(-230, 1069 "No directory! Logging in with home=/"); 1070 homedir[0] = '/'; 1071 } 1072 } 1073 break; 1074 } 1075 setlogin(pw->pw_name); 1076 if (dropprivs || 1077 (curclass.type != CLASS_REAL && 1078 ntohs(ctrl_addr.su_port) > IPPORT_RESERVED + 1)) { 1079 dropprivs++; 1080 if (setgid((gid_t)pw->pw_gid) < 0) { 1081 reply(550, "Can't set gid."); 1082 goto bad; 1083 } 1084 if (setuid((uid_t)pw->pw_uid) < 0) { 1085 reply(550, "Can't set uid."); 1086 goto bad; 1087 } 1088 } else { 1089 if (seteuid((uid_t)pw->pw_uid) < 0) { 1090 reply(550, "Can't set uid."); 1091 goto bad; 1092 } 1093 } 1094 setenv("HOME", homedir, 1); 1095 1096 if (curclass.type == CLASS_GUEST && passwd[0] == '-') 1097 quietmessages = 1; 1098 1099 /* 1100 * Display a login message, if it exists. 1101 * N.B. reply(230,) must follow the message. 1102 */ 1103 (void)display_file(conffilename(curclass.motd), 230); 1104 show_chdir_messages(230); 1105 if (curclass.type == CLASS_GUEST) { 1106 reply(230, "Guest login ok, access restrictions apply."); 1107 #if HAVE_SETPROCTITLE 1108 snprintf(proctitle, sizeof(proctitle), 1109 "%s: anonymous/%.*s", remotehost, 1110 (int) (sizeof(proctitle) - sizeof(remotehost) - 1111 sizeof(": anonymous/")), passwd); 1112 setproctitle("%s", proctitle); 1113 #endif /* HAVE_SETPROCTITLE */ 1114 if (logging) 1115 syslog(LOG_INFO, 1116 "ANONYMOUS FTP LOGIN FROM %s, %s (class: %s, type: %s)", 1117 remotehost, passwd, 1118 curclass.classname, CURCLASSTYPE); 1119 } else { 1120 reply(230, "User %s logged in.", pw->pw_name); 1121 #if HAVE_SETPROCTITLE 1122 snprintf(proctitle, sizeof(proctitle), 1123 "%s: %s", remotehost, pw->pw_name); 1124 setproctitle("%s", proctitle); 1125 #endif /* HAVE_SETPROCTITLE */ 1126 if (logging) 1127 syslog(LOG_INFO, 1128 "FTP LOGIN FROM %s as %s (class: %s, type: %s)", 1129 remotehost, pw->pw_name, 1130 curclass.classname, CURCLASSTYPE); 1131 } 1132 (void) umask(curclass.umask); 1133 goto cleanuppass; 1134 1135 bad: 1136 /* Forget all about it... */ 1137 end_login(); 1138 1139 cleanuppass: 1140 if (class) 1141 free(class); 1142 } 1143 1144 void 1145 retrieve(char *argv[], const char *name) 1146 { 1147 FILE *fin, *dout; 1148 struct stat st; 1149 int (*closefunc)(FILE *) = NULL; 1150 int log, sendrv, closerv, stderrfd, isconversion, isdata, isls; 1151 struct timeval start, finish, td, *tdp; 1152 const char *dispname; 1153 1154 sendrv = closerv = stderrfd = -1; 1155 isconversion = isdata = isls = log = 0; 1156 tdp = NULL; 1157 dispname = name; 1158 fin = dout = NULL; 1159 if (argv == NULL) { 1160 log = 1; 1161 isdata = 1; 1162 fin = fopen(name, "r"); 1163 closefunc = fclose; 1164 if (fin == NULL) 1165 argv = do_conversion(name); 1166 if (argv != NULL) { 1167 isconversion++; 1168 syslog(LOG_INFO, "get command: '%s' on '%s'", 1169 argv[0], name); 1170 } 1171 } 1172 if (argv != NULL) { 1173 char temp[MAXPATHLEN]; 1174 1175 if (strcmp(argv[0], INTERNAL_LS) == 0) { 1176 isls = 1; 1177 stderrfd = -1; 1178 } else { 1179 (void)snprintf(temp, sizeof(temp), "%s", TMPFILE); 1180 stderrfd = mkstemp(temp); 1181 if (stderrfd != -1) 1182 (void)unlink(temp); 1183 } 1184 dispname = argv[0]; 1185 fin = ftpd_popen(argv, "r", stderrfd); 1186 closefunc = ftpd_pclose; 1187 st.st_size = -1; 1188 st.st_blksize = BUFSIZ; 1189 } 1190 if (fin == NULL) { 1191 if (errno != 0) { 1192 perror_reply(550, dispname); 1193 if (log) 1194 logcmd("get", -1, name, NULL, NULL, 1195 strerror(errno)); 1196 } 1197 goto cleanupretrieve; 1198 } 1199 byte_count = -1; 1200 if (argv == NULL 1201 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 1202 reply(550, "%s: not a plain file.", dispname); 1203 goto done; 1204 } 1205 if (restart_point) { 1206 if (type == TYPE_A) { 1207 off_t i; 1208 int c; 1209 1210 for (i = 0; i < restart_point; i++) { 1211 if ((c=getc(fin)) == EOF) { 1212 perror_reply(550, dispname); 1213 goto done; 1214 } 1215 if (c == '\n') 1216 i++; 1217 } 1218 } else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 1219 perror_reply(550, dispname); 1220 goto done; 1221 } 1222 } 1223 dout = dataconn(dispname, st.st_size, "w"); 1224 if (dout == NULL) 1225 goto done; 1226 1227 (void)gettimeofday(&start, NULL); 1228 sendrv = send_data(fin, dout, st.st_blksize, isdata); 1229 (void)gettimeofday(&finish, NULL); 1230 (void) fclose(dout); /* close now to affect timing stats */ 1231 dout = NULL; 1232 timersub(&finish, &start, &td); 1233 tdp = &td; 1234 done: 1235 if (log) 1236 logcmd("get", byte_count, name, NULL, tdp, NULL); 1237 closerv = (*closefunc)(fin); 1238 if (sendrv == 0) { 1239 FILE *err; 1240 struct stat sb; 1241 1242 if (!isls && argv != NULL && closerv != 0) { 1243 reply(-226, 1244 "Command returned an exit status of %d", 1245 closerv); 1246 if (isconversion) 1247 syslog(LOG_INFO, 1248 "retrieve command: '%s' returned %d", 1249 argv[0], closerv); 1250 } 1251 if (!isls && argv != NULL && stderrfd != -1 && 1252 (fstat(stderrfd, &sb) == 0) && sb.st_size > 0 && 1253 ((err = fdopen(stderrfd, "r")) != NULL)) { 1254 char *cp, line[LINE_MAX]; 1255 1256 reply(-226, "Command error messages:"); 1257 rewind(err); 1258 while (fgets(line, sizeof(line), err) != NULL) { 1259 if ((cp = strchr(line, '\n')) != NULL) 1260 *cp = '\0'; 1261 reply(0, " %s", line); 1262 } 1263 (void) fflush(stdout); 1264 (void) fclose(err); 1265 /* a reply(226,) must follow */ 1266 } 1267 reply(226, "Transfer complete."); 1268 } 1269 cleanupretrieve: 1270 closedataconn(dout); 1271 if (stderrfd != -1) 1272 (void)close(stderrfd); 1273 if (isconversion) 1274 free(argv); 1275 } 1276 1277 void 1278 store(const char *name, const char *mode, int unique) 1279 { 1280 FILE *fout, *din; 1281 struct stat st; 1282 int (*closefunc)(FILE *); 1283 struct timeval start, finish, td, *tdp; 1284 char *desc; 1285 1286 din = NULL; 1287 desc = (*mode == 'w') ? "put" : "append"; 1288 if (unique && stat(name, &st) == 0 && 1289 (name = gunique(name)) == NULL) { 1290 logcmd(desc, -1, name, NULL, NULL, "cannot create unique file"); 1291 goto cleanupstore; 1292 } 1293 1294 if (restart_point) 1295 mode = "r+"; 1296 fout = fopen(name, mode); 1297 closefunc = fclose; 1298 tdp = NULL; 1299 if (fout == NULL) { 1300 perror_reply(553, name); 1301 logcmd(desc, -1, name, NULL, NULL, strerror(errno)); 1302 goto cleanupstore; 1303 } 1304 byte_count = -1; 1305 if (restart_point) { 1306 if (type == TYPE_A) { 1307 off_t i; 1308 int c; 1309 1310 for (i = 0; i < restart_point; i++) { 1311 if ((c=getc(fout)) == EOF) { 1312 perror_reply(550, name); 1313 goto done; 1314 } 1315 if (c == '\n') 1316 i++; 1317 } 1318 /* 1319 * We must do this seek to "current" position 1320 * because we are changing from reading to 1321 * writing. 1322 */ 1323 if (fseek(fout, 0L, SEEK_CUR) < 0) { 1324 perror_reply(550, name); 1325 goto done; 1326 } 1327 } else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1328 perror_reply(550, name); 1329 goto done; 1330 } 1331 } 1332 din = dataconn(name, (off_t)-1, "r"); 1333 if (din == NULL) 1334 goto done; 1335 (void)gettimeofday(&start, NULL); 1336 if (receive_data(din, fout) == 0) { 1337 if (unique) 1338 reply(226, "Transfer complete (unique file name:%s).", 1339 name); 1340 else 1341 reply(226, "Transfer complete."); 1342 } 1343 (void)gettimeofday(&finish, NULL); 1344 (void) fclose(din); /* close now to affect timing stats */ 1345 din = NULL; 1346 timersub(&finish, &start, &td); 1347 tdp = &td; 1348 done: 1349 logcmd(desc, byte_count, name, NULL, tdp, NULL); 1350 (*closefunc)(fout); 1351 cleanupstore: 1352 closedataconn(din); 1353 } 1354 1355 static FILE * 1356 getdatasock(const char *mode) 1357 { 1358 int on, s, t, tries; 1359 in_port_t port; 1360 1361 on = 1; 1362 if (data >= 0) 1363 return (fdopen(data, mode)); 1364 if (! dropprivs) 1365 (void) seteuid((uid_t)0); 1366 s = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 1367 if (s < 0) 1368 goto bad; 1369 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 1370 (char *) &on, sizeof(on)) < 0) 1371 goto bad; 1372 if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1373 (char *) &on, sizeof(on)) < 0) 1374 goto bad; 1375 /* anchor socket to avoid multi-homing problems */ 1376 data_source = ctrl_addr; 1377 /* 1378 * By default source port for PORT connctions is 1379 * ctrlport-1 (see RFC959 section 5.2). 1380 * However, if privs have been dropped and that 1381 * would be < IPPORT_RESERVED, use a random port 1382 * instead. 1383 */ 1384 if (dataport) 1385 port = dataport; 1386 else 1387 port = ntohs(ctrl_addr.su_port) - 1; 1388 if (dropprivs && port < IPPORT_RESERVED) 1389 port = 0; /* use random port */ 1390 data_source.su_port = htons(port); 1391 1392 for (tries = 1; ; tries++) { 1393 if (bind(s, (struct sockaddr *)&data_source.si_su, 1394 data_source.su_len) >= 0) 1395 break; 1396 if (errno != EADDRINUSE || tries > 10) 1397 goto bad; 1398 sleep(tries); 1399 } 1400 if (! dropprivs) 1401 (void) seteuid((uid_t)pw->pw_uid); 1402 #ifdef IP_TOS 1403 if (!mapped && ctrl_addr.su_family == AF_INET) { 1404 on = IPTOS_THROUGHPUT; 1405 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, 1406 sizeof(int)) < 0) 1407 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 1408 } 1409 #endif 1410 return (fdopen(s, mode)); 1411 bad: 1412 /* Return the real value of errno (close may change it) */ 1413 t = errno; 1414 if (! dropprivs) 1415 (void) seteuid((uid_t)pw->pw_uid); 1416 (void) close(s); 1417 errno = t; 1418 return (NULL); 1419 } 1420 1421 FILE * 1422 dataconn(const char *name, off_t size, const char *mode) 1423 { 1424 char sizebuf[32]; 1425 FILE *file; 1426 int retry = 0, tos, keepalive; 1427 1428 file_size = size; 1429 byte_count = 0; 1430 if (size != (off_t) -1) 1431 (void)snprintf(sizebuf, sizeof(sizebuf), " (" LLF " byte%s)", 1432 (LLT)size, PLURAL(size)); 1433 else 1434 sizebuf[0] = '\0'; 1435 if (pdata >= 0) { 1436 struct sockinet from; 1437 int s, fromlen = sizeof(from.su_len); 1438 1439 (void) alarm(curclass.timeout); 1440 s = accept(pdata, (struct sockaddr *)&from.si_su, &fromlen); 1441 (void) alarm(0); 1442 if (s < 0) { 1443 reply(425, "Can't open data connection."); 1444 (void) close(pdata); 1445 pdata = -1; 1446 return (NULL); 1447 } 1448 (void) close(pdata); 1449 pdata = s; 1450 switch (from.su_family) { 1451 case AF_INET: 1452 #ifdef IP_TOS 1453 if (!mapped) { 1454 tos = IPTOS_THROUGHPUT; 1455 (void) setsockopt(s, IPPROTO_IP, IP_TOS, 1456 (char *)&tos, sizeof(int)); 1457 } 1458 break; 1459 #endif 1460 } 1461 /* Set keepalives on the socket to detect dropped conns. */ 1462 #ifdef SO_KEEPALIVE 1463 keepalive = 1; 1464 (void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1465 (char *)&keepalive, sizeof(int)); 1466 #endif 1467 reply(150, "Opening %s mode data connection for '%s'%s.", 1468 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1469 return (fdopen(pdata, mode)); 1470 } 1471 if (data >= 0) { 1472 reply(125, "Using existing data connection for '%s'%s.", 1473 name, sizebuf); 1474 usedefault = 1; 1475 return (fdopen(data, mode)); 1476 } 1477 if (usedefault) 1478 data_dest = his_addr; 1479 usedefault = 1; 1480 file = getdatasock(mode); 1481 if (file == NULL) { 1482 char hbuf[NI_MAXHOST]; 1483 char pbuf[NI_MAXSERV]; 1484 1485 if (getnameinfo((struct sockaddr *)&data_source.si_su, 1486 data_source.su_len, hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), 1487 NI_NUMERICHOST | NI_NUMERICSERV)) 1488 strlcpy(hbuf, "?", sizeof(hbuf)); 1489 reply(425, "Can't create data socket (%s,%s): %s.", 1490 hbuf, pbuf, strerror(errno)); 1491 return (NULL); 1492 } 1493 data = fileno(file); 1494 while (connect(data, (struct sockaddr *)&data_dest.si_su, 1495 data_dest.su_len) < 0) { 1496 if (errno == EADDRINUSE && retry < swaitmax) { 1497 sleep((unsigned) swaitint); 1498 retry += swaitint; 1499 continue; 1500 } 1501 perror_reply(425, "Can't build data connection"); 1502 (void) fclose(file); 1503 data = -1; 1504 return (NULL); 1505 } 1506 reply(150, "Opening %s mode data connection for '%s'%s.", 1507 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1508 return (file); 1509 } 1510 1511 void 1512 closedataconn(FILE *fd) 1513 { 1514 1515 if (fd != NULL) 1516 (void)fclose(fd); 1517 data = -1; 1518 if (pdata >= 0) 1519 (void)close(pdata); 1520 pdata = -1; 1521 } 1522 1523 /* 1524 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 1525 * encapsulation of the data subject * to Mode, Structure, and Type. 1526 * 1527 * NB: Form isn't handled. 1528 */ 1529 static int 1530 send_data(FILE *instr, FILE *outstr, off_t blksize, int isdata) 1531 { 1532 int c, filefd, netfd, rval; 1533 char *buf; 1534 1535 transflag = 1; 1536 rval = -1; 1537 buf = NULL; 1538 if (setjmp(urgcatch)) 1539 goto cleanup_send_data; 1540 1541 switch (type) { 1542 1543 case TYPE_A: 1544 /* XXXLUKEM: rate limit ascii send (get) */ 1545 (void) alarm(curclass.timeout); 1546 while ((c = getc(instr)) != EOF) { 1547 byte_count++; 1548 if (c == '\n') { 1549 if (ferror(outstr)) 1550 goto data_err; 1551 (void) putc('\r', outstr); 1552 if (isdata) { 1553 total_data_out++; 1554 total_data++; 1555 } 1556 total_bytes_out++; 1557 total_bytes++; 1558 } 1559 (void) putc(c, outstr); 1560 if (isdata) { 1561 total_data_out++; 1562 total_data++; 1563 } 1564 total_bytes_out++; 1565 total_bytes++; 1566 if ((byte_count % 4096) == 0) 1567 (void) alarm(curclass.timeout); 1568 } 1569 (void) alarm(0); 1570 fflush(outstr); 1571 if (ferror(instr)) 1572 goto file_err; 1573 if (ferror(outstr)) 1574 goto data_err; 1575 rval = 0; 1576 goto cleanup_send_data; 1577 1578 case TYPE_I: 1579 case TYPE_L: 1580 if ((buf = malloc((size_t)blksize)) == NULL) { 1581 perror_reply(451, "Local resource failure: malloc"); 1582 goto cleanup_send_data; 1583 } 1584 filefd = fileno(instr); 1585 netfd = fileno(outstr); 1586 (void) alarm(curclass.timeout); 1587 if (curclass.rateget) { 1588 while (1) { 1589 int d; 1590 struct timeval then, now, td; 1591 off_t bufrem; 1592 char *bufp; 1593 1594 (void)gettimeofday(&then, NULL); 1595 errno = c = d = 0; 1596 bufrem = curclass.rateget; 1597 while (bufrem > 0) { 1598 if ((c = read(filefd, buf, 1599 MIN(blksize, bufrem))) <= 0) 1600 goto senddone; 1601 (void) alarm(curclass.timeout); 1602 bufrem -= c; 1603 byte_count += c; 1604 if (isdata) { 1605 total_data_out += c; 1606 total_data += c; 1607 } 1608 total_bytes_out += c; 1609 total_bytes += c; 1610 for (bufp = buf; c > 0; 1611 c -= d, bufp += d) 1612 if ((d = 1613 write(netfd, bufp, c)) <= 0) 1614 break; 1615 if (d < 0) 1616 goto data_err; 1617 } 1618 (void)gettimeofday(&now, NULL); 1619 timersub(&now, &then, &td); 1620 if (td.tv_sec == 0) 1621 usleep(1000000 - td.tv_usec); 1622 } 1623 } else { 1624 while ((c = read(filefd, buf, (size_t)blksize)) > 0) { 1625 if (write(netfd, buf, c) != c) 1626 goto data_err; 1627 (void) alarm(curclass.timeout); 1628 byte_count += c; 1629 if (isdata) { 1630 total_data_out += c; 1631 total_data += c; 1632 } 1633 total_bytes_out += c; 1634 total_bytes += c; 1635 } 1636 } 1637 senddone: 1638 if (c < 0) 1639 goto file_err; 1640 rval = 0; 1641 goto cleanup_send_data; 1642 1643 default: 1644 reply(550, "Unimplemented TYPE %d in send_data", type); 1645 goto cleanup_send_data; 1646 } 1647 1648 data_err: 1649 (void) alarm(0); 1650 perror_reply(426, "Data connection"); 1651 goto cleanup_send_data; 1652 1653 file_err: 1654 (void) alarm(0); 1655 perror_reply(551, "Error on input file"); 1656 /* FALLTHROUGH */ 1657 1658 cleanup_send_data: 1659 (void) alarm(0); 1660 transflag = 0; 1661 if (buf) 1662 free(buf); 1663 if (isdata) { 1664 total_files_out++; 1665 total_files++; 1666 } 1667 total_xfers_out++; 1668 total_xfers++; 1669 return (rval); 1670 } 1671 1672 /* 1673 * Transfer data from peer to "outstr" using the appropriate encapulation of 1674 * the data subject to Mode, Structure, and Type. 1675 * 1676 * N.B.: Form isn't handled. 1677 */ 1678 static int 1679 receive_data(FILE *instr, FILE *outstr) 1680 { 1681 int c, bare_lfs, netfd, filefd, rval; 1682 off_t byteswritten; 1683 char buf[BUFSIZ]; 1684 #ifdef __GNUC__ 1685 (void) &bare_lfs; 1686 #endif 1687 1688 bare_lfs = 0; 1689 transflag = 1; 1690 rval = -1; 1691 byteswritten = 0; 1692 if (setjmp(urgcatch)) 1693 goto cleanup_recv_data; 1694 1695 #define FILESIZECHECK(x) \ 1696 do { \ 1697 if (curclass.maxfilesize != -1 && \ 1698 (x) > curclass.maxfilesize) { \ 1699 errno = EFBIG; \ 1700 goto file_err; \ 1701 } \ 1702 } while (0) 1703 1704 switch (type) { 1705 1706 case TYPE_I: 1707 case TYPE_L: 1708 netfd = fileno(instr); 1709 filefd = fileno(outstr); 1710 (void) alarm(curclass.timeout); 1711 if (curclass.rateput) { 1712 while (1) { 1713 int d; 1714 struct timeval then, now, td; 1715 off_t bufrem; 1716 1717 (void)gettimeofday(&then, NULL); 1718 errno = c = d = 0; 1719 for (bufrem = curclass.rateput; bufrem > 0; ) { 1720 if ((c = read(netfd, buf, 1721 MIN(sizeof(buf), bufrem))) <= 0) 1722 goto recvdone; 1723 FILESIZECHECK(byte_count + c); 1724 if ((d = write(filefd, buf, c)) != c) 1725 goto file_err; 1726 (void) alarm(curclass.timeout); 1727 bufrem -= c; 1728 byte_count += c; 1729 total_data_in += c; 1730 total_data += c; 1731 total_bytes_in += c; 1732 total_bytes += c; 1733 } 1734 (void)gettimeofday(&now, NULL); 1735 timersub(&now, &then, &td); 1736 if (td.tv_sec == 0) 1737 usleep(1000000 - td.tv_usec); 1738 } 1739 } else { 1740 while ((c = read(netfd, buf, sizeof(buf))) > 0) { 1741 FILESIZECHECK(byte_count + c); 1742 if (write(filefd, buf, c) != c) 1743 goto file_err; 1744 (void) alarm(curclass.timeout); 1745 byte_count += c; 1746 total_data_in += c; 1747 total_data += c; 1748 total_bytes_in += c; 1749 total_bytes += c; 1750 } 1751 } 1752 recvdone: 1753 if (c < 0) 1754 goto data_err; 1755 rval = 0; 1756 goto cleanup_recv_data; 1757 1758 case TYPE_E: 1759 reply(553, "TYPE E not implemented."); 1760 goto cleanup_recv_data; 1761 1762 case TYPE_A: 1763 (void) alarm(curclass.timeout); 1764 /* XXXLUKEM: rate limit ascii receive (put) */ 1765 while ((c = getc(instr)) != EOF) { 1766 byte_count++; 1767 total_data_in++; 1768 total_data++; 1769 total_bytes_in++; 1770 total_bytes++; 1771 if ((byte_count % 4096) == 0) 1772 (void) alarm(curclass.timeout); 1773 if (c == '\n') 1774 bare_lfs++; 1775 while (c == '\r') { 1776 if (ferror(outstr)) 1777 goto data_err; 1778 if ((c = getc(instr)) != '\n') { 1779 byte_count++; 1780 total_data_in++; 1781 total_data++; 1782 total_bytes_in++; 1783 total_bytes++; 1784 if ((byte_count % 4096) == 0) 1785 (void) alarm(curclass.timeout); 1786 byteswritten++; 1787 FILESIZECHECK(byteswritten); 1788 (void) putc ('\r', outstr); 1789 if (c == '\0' || c == EOF) 1790 goto contin2; 1791 } 1792 } 1793 byteswritten++; 1794 FILESIZECHECK(byteswritten); 1795 (void) putc(c, outstr); 1796 contin2: ; 1797 } 1798 (void) alarm(0); 1799 fflush(outstr); 1800 if (ferror(instr)) 1801 goto data_err; 1802 if (ferror(outstr)) 1803 goto file_err; 1804 if (bare_lfs) { 1805 reply(-226, 1806 "WARNING! %d bare linefeeds received in ASCII mode", 1807 bare_lfs); 1808 reply(0, "File may not have transferred correctly."); 1809 } 1810 rval = 0; 1811 goto cleanup_recv_data; 1812 1813 default: 1814 reply(550, "Unimplemented TYPE %d in receive_data", type); 1815 goto cleanup_recv_data; 1816 } 1817 #undef FILESIZECHECK(x) 1818 1819 data_err: 1820 (void) alarm(0); 1821 perror_reply(426, "Data Connection"); 1822 goto cleanup_recv_data; 1823 1824 file_err: 1825 (void) alarm(0); 1826 perror_reply(452, "Error writing file"); 1827 goto cleanup_recv_data; 1828 1829 cleanup_recv_data: 1830 (void) alarm(0); 1831 transflag = 0; 1832 total_files_in++; 1833 total_files++; 1834 total_xfers_in++; 1835 total_xfers++; 1836 return (rval); 1837 } 1838 1839 void 1840 statcmd(void) 1841 { 1842 struct sockinet *su = NULL; 1843 static char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; 1844 u_char *a, *p; 1845 int ispassive, af; 1846 off_t otbi, otbo, otb; 1847 1848 a = p = (u_char *)NULL; 1849 1850 reply(-211, "%s FTP server status:", hostname); 1851 reply(0, "Version: %s", EMPTYSTR(version) ? "<suppressed>" : version); 1852 hbuf[0] = '\0'; 1853 if (!getnameinfo((struct sockaddr *)&his_addr.si_su, his_addr.su_len, 1854 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) 1855 && strcmp(remotehost, hbuf) != 0) 1856 reply(0, "Connected to %s (%s)", remotehost, hbuf); 1857 else 1858 reply(0, "Connected to %s", remotehost); 1859 1860 if (logged_in) { 1861 if (curclass.type == CLASS_GUEST) 1862 reply(0, "Logged in anonymously"); 1863 else 1864 reply(0, "Logged in as %s%s", pw->pw_name, 1865 curclass.type == CLASS_CHROOT ? " (chroot)" : ""); 1866 } else if (askpasswd) 1867 reply(0, "Waiting for password"); 1868 else 1869 reply(0, "Waiting for user name"); 1870 cprintf(stdout, " TYPE: %s", typenames[type]); 1871 if (type == TYPE_A || type == TYPE_E) 1872 cprintf(stdout, ", FORM: %s", formnames[form]); 1873 if (type == TYPE_L) { 1874 #if NBBY == 8 1875 cprintf(stdout, " %d", NBBY); 1876 #else 1877 /* XXX: `bytesize' needs to be defined in this case */ 1878 cprintf(stdout, " %d", bytesize); 1879 #endif 1880 } 1881 cprintf(stdout, "; STRUcture: %s; transfer MODE: %s\r\n", 1882 strunames[stru], modenames[mode]); 1883 ispassive = 0; 1884 if (data != -1) { 1885 reply(0, "Data connection open"); 1886 su = NULL; 1887 } else if (pdata != -1) { 1888 reply(0, "in Passive mode"); 1889 su = (struct sockinet *)&pasv_addr; 1890 ispassive = 1; 1891 goto printaddr; 1892 } else if (usedefault == 0) { 1893 if (epsvall) { 1894 reply(0, "EPSV only mode (EPSV ALL)"); 1895 goto epsvonly; 1896 } 1897 su = (struct sockinet *)&data_dest; 1898 printaddr: 1899 /* PASV/PORT */ 1900 if (su->su_family == AF_INET) { 1901 a = (u_char *) &su->su_addr; 1902 p = (u_char *) &su->su_port; 1903 #define UC(b) (((int) b) & 0xff) 1904 reply(0, "%s (%d,%d,%d,%d,%d,%d)", 1905 ispassive ? "PASV" : "PORT" , 1906 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1907 UC(p[0]), UC(p[1])); 1908 } 1909 1910 /* LPSV/LPRT */ 1911 { 1912 int alen, af, i; 1913 1914 alen = 0; 1915 switch (su->su_family) { 1916 case AF_INET: 1917 a = (u_char *) &su->su_addr; 1918 p = (u_char *) &su->su_port; 1919 alen = sizeof(su->su_addr); 1920 af = 4; 1921 break; 1922 #ifdef INET6 1923 case AF_INET6: 1924 a = (u_char *) &su->su_6addr; 1925 p = (u_char *) &su->su_port; 1926 alen = sizeof(su->su_6addr); 1927 af = 6; 1928 break; 1929 #endif 1930 default: 1931 af = 0; 1932 break; 1933 } 1934 if (af) { 1935 cprintf(stdout, " %s (%d,%d", 1936 ispassive ? "LPSV" : "LPRT", af, alen); 1937 for (i = 0; i < alen; i++) 1938 cprintf(stdout, ",%d", UC(a[i])); 1939 cprintf(stdout, ",%d,%d,%d)\r\n", 1940 2, UC(p[0]), UC(p[1])); 1941 #undef UC 1942 } 1943 } 1944 1945 /* EPRT/EPSV */ 1946 epsvonly: 1947 af = af2epsvproto(su->su_family); 1948 hbuf[0] = '\0'; 1949 if (af > 0) { 1950 struct sockinet tmp; 1951 1952 tmp = *su; 1953 #ifdef INET6 1954 if (tmp.su_family == AF_INET6) 1955 tmp.su_scope_id = 0; 1956 #endif 1957 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1958 tmp.su_len, hbuf, sizeof(hbuf), sbuf, sizeof(sbuf), 1959 NI_NUMERICHOST | NI_NUMERICSERV) == 0) 1960 reply(0, "%s (|%d|%s|%s|)", 1961 ispassive ? "EPSV" : "EPRT", 1962 af, hbuf, sbuf); 1963 } 1964 } else 1965 reply(0, "No data connection"); 1966 1967 if (logged_in) { 1968 reply(0, 1969 "Data sent: " LLF " byte%s in " LLF " file%s", 1970 (LLT)total_data_out, PLURAL(total_data_out), 1971 (LLT)total_files_out, PLURAL(total_files_out)); 1972 reply(0, 1973 "Data received: " LLF " byte%s in " LLF " file%s", 1974 (LLT)total_data_in, PLURAL(total_data_in), 1975 (LLT)total_files_in, PLURAL(total_files_in)); 1976 reply(0, 1977 "Total data: " LLF " byte%s in " LLF " file%s", 1978 (LLT)total_data, PLURAL(total_data), 1979 (LLT)total_files, PLURAL(total_files)); 1980 } 1981 otbi = total_bytes_in; 1982 otbo = total_bytes_out; 1983 otb = total_bytes; 1984 reply(0, "Traffic sent: " LLF " byte%s in " LLF " transfer%s", 1985 (LLT)otbo, PLURAL(otbo), 1986 (LLT)total_xfers_out, PLURAL(total_xfers_out)); 1987 reply(0, "Traffic received: " LLF " byte%s in " LLF " transfer%s", 1988 (LLT)otbi, PLURAL(otbi), 1989 (LLT)total_xfers_in, PLURAL(total_xfers_in)); 1990 reply(0, "Total traffic: " LLF " byte%s in " LLF " transfer%s", 1991 (LLT)otb, PLURAL(otb), 1992 (LLT)total_xfers, PLURAL(total_xfers)); 1993 1994 if (logged_in) { 1995 struct ftpconv *cp; 1996 1997 reply(0, "%s", ""); 1998 reply(0, "Class: %s, type: %s", 1999 curclass.classname, CURCLASSTYPE); 2000 reply(0, "Check PORT/LPRT commands: %sabled", 2001 CURCLASS_FLAGS_ISSET(checkportcmd) ? "en" : "dis"); 2002 if (! EMPTYSTR(curclass.display)) 2003 reply(0, "Display file: %s", curclass.display); 2004 if (! EMPTYSTR(curclass.notify)) 2005 reply(0, "Notify fileglob: %s", curclass.notify); 2006 reply(0, "Idle timeout: %d, maximum timeout: %d", 2007 curclass.timeout, curclass.maxtimeout); 2008 reply(0, "Current connections: %d", connections); 2009 if (curclass.limit == -1) 2010 reply(0, "Maximum connections: unlimited"); 2011 else 2012 reply(0, "Maximum connections: %d", curclass.limit); 2013 if (curclass.limitfile) 2014 reply(0, "Connection limit exceeded message file: %s", 2015 curclass.limitfile); 2016 if (! EMPTYSTR(curclass.chroot)) 2017 reply(0, "Chroot format: %s", curclass.chroot); 2018 if (! EMPTYSTR(curclass.homedir)) 2019 reply(0, "Homedir format: %s", curclass.homedir); 2020 if (curclass.maxfilesize == -1) 2021 reply(0, "Maximum file size: unlimited"); 2022 else 2023 reply(0, "Maximum file size: " LLF, 2024 (LLT)curclass.maxfilesize); 2025 if (! EMPTYSTR(curclass.motd)) 2026 reply(0, "MotD file: %s", curclass.motd); 2027 reply(0, 2028 "Modify commands (CHMOD, DELE, MKD, RMD, RNFR, UMASK): %sabled", 2029 CURCLASS_FLAGS_ISSET(modify) ? "en" : "dis"); 2030 reply(0, "Upload commands (APPE, STOR, STOU): %sabled", 2031 CURCLASS_FLAGS_ISSET(upload) ? "en" : "dis"); 2032 reply(0, "Sanitize file names: %sabled", 2033 CURCLASS_FLAGS_ISSET(sanenames) ? "en" : "dis"); 2034 reply(0, "PASV/LPSV/EPSV connections: %sabled", 2035 CURCLASS_FLAGS_ISSET(passive) ? "en" : "dis"); 2036 if (curclass.portmin && curclass.portmax) 2037 reply(0, "PASV port range: %d - %d", 2038 curclass.portmin, curclass.portmax); 2039 if (curclass.rateget) 2040 reply(0, "Rate get limit: " LLF " bytes/sec", 2041 (LLT)curclass.rateget); 2042 else 2043 reply(0, "Rate get limit: disabled"); 2044 if (curclass.rateput) 2045 reply(0, "Rate put limit: " LLF " bytes/sec", 2046 (LLT)curclass.rateput); 2047 else 2048 reply(0, "Rate put limit: disabled"); 2049 reply(0, "Umask: %.04o", curclass.umask); 2050 for (cp = curclass.conversions; cp != NULL; cp=cp->next) { 2051 if (cp->suffix == NULL || cp->types == NULL || 2052 cp->command == NULL) 2053 continue; 2054 reply(0, "Conversion: %s [%s] disable: %s, command: %s", 2055 cp->suffix, cp->types, cp->disable, cp->command); 2056 } 2057 } 2058 2059 reply(211, "End of status"); 2060 } 2061 2062 void 2063 fatal(const char *s) 2064 { 2065 2066 reply(451, "Error in server: %s\n", s); 2067 reply(221, "Closing connection due to server error."); 2068 dologout(0); 2069 /* NOTREACHED */ 2070 } 2071 2072 /* 2073 * reply() -- 2074 * depending on the value of n, display fmt with a trailing CRLF and 2075 * prefix of: 2076 * n < -1 prefix the message with abs(n) + "-" (initial line) 2077 * n == 0 prefix the message with 4 spaces (middle lines) 2078 * n > 0 prefix the message with n + " " (final line) 2079 */ 2080 void 2081 reply(int n, const char *fmt, ...) 2082 { 2083 off_t b; 2084 va_list ap; 2085 2086 va_start(ap, fmt); 2087 b = 0; 2088 if (n == 0) 2089 cprintf(stdout, " "); 2090 else if (n < 0) 2091 cprintf(stdout, "%d-", -n); 2092 else 2093 cprintf(stdout, "%d ", n); 2094 b = vprintf(fmt, ap); 2095 total_bytes += b; 2096 total_bytes_out += b; 2097 cprintf(stdout, "\r\n"); 2098 (void)fflush(stdout); 2099 if (debug) { 2100 syslog(LOG_DEBUG, "<--- %d%c", abs(n), (n < 0) ? '-' : ' '); 2101 vsyslog(LOG_DEBUG, fmt, ap); 2102 } 2103 } 2104 2105 static void 2106 dolog(struct sockinet *who) 2107 { 2108 2109 if (getnameinfo((struct sockaddr *)&who->si_su, 2110 who->su_len, remotehost, sizeof(remotehost), NULL, 0, 0)) 2111 strlcpy(remotehost, "?", sizeof(remotehost)); 2112 2113 #if HAVE_SETPROCTITLE 2114 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 2115 setproctitle("%s", proctitle); 2116 #endif /* HAVE_SETPROCTITLE */ 2117 if (logging) 2118 syslog(LOG_INFO, "connection from %s to %s", 2119 remotehost, hostname); 2120 } 2121 2122 /* 2123 * Record logout in wtmp file 2124 * and exit with supplied status. 2125 */ 2126 void 2127 dologout(int status) 2128 { 2129 /* 2130 * Prevent reception of SIGURG from resulting in a resumption 2131 * back to the main program loop. 2132 */ 2133 transflag = 0; 2134 2135 if (logged_in) { 2136 if (dowtmp) 2137 logwtmp(ttyline, "", ""); 2138 if (doutmp) 2139 logout(utmp.ut_line); 2140 #ifdef KERBEROS 2141 if (!notickets && krbtkfile_env) 2142 unlink(krbtkfile_env); 2143 #endif 2144 } 2145 /* beware of flushing buffers after a SIGPIPE */ 2146 _exit(status); 2147 } 2148 2149 static void 2150 myoob(int signo) 2151 { 2152 char *cp; 2153 2154 /* only process if transfer occurring */ 2155 if (!transflag) 2156 return; 2157 cp = tmpline; 2158 if (getline(cp, 7, stdin) == NULL) { 2159 reply(221, "You could at least say goodbye."); 2160 dologout(0); 2161 } 2162 if (strcasecmp(cp, "ABOR\r\n") == 0) { 2163 tmpline[0] = '\0'; 2164 reply(426, "Transfer aborted. Data connection closed."); 2165 reply(226, "Abort successful"); 2166 longjmp(urgcatch, 1); 2167 } 2168 if (strcasecmp(cp, "STAT\r\n") == 0) { 2169 tmpline[0] = '\0'; 2170 if (file_size != (off_t) -1) 2171 reply(213, 2172 "Status: " LLF " of " LLF " byte%s transferred", 2173 (LLT)byte_count, (LLT)file_size, 2174 PLURAL(byte_count)); 2175 else 2176 reply(213, "Status: " LLF " byte%s transferred", 2177 (LLT)byte_count, PLURAL(byte_count)); 2178 } 2179 } 2180 2181 static int 2182 bind_pasv_addr(void) 2183 { 2184 static int passiveport; 2185 int port, len; 2186 2187 len = pasv_addr.su_len; 2188 if (curclass.portmin == 0 && curclass.portmax == 0) { 2189 pasv_addr.su_port = 0; 2190 return (bind(pdata, (struct sockaddr *)&pasv_addr.si_su, len)); 2191 } 2192 2193 if (passiveport == 0) { 2194 srand(getpid()); 2195 passiveport = rand() % (curclass.portmax - curclass.portmin) 2196 + curclass.portmin; 2197 } 2198 2199 port = passiveport; 2200 while (1) { 2201 port++; 2202 if (port > curclass.portmax) 2203 port = curclass.portmin; 2204 else if (port == passiveport) { 2205 errno = EAGAIN; 2206 return (-1); 2207 } 2208 pasv_addr.su_port = htons(port); 2209 if (bind(pdata, (struct sockaddr *)&pasv_addr.si_su, len) == 0) 2210 break; 2211 if (errno != EADDRINUSE) 2212 return (-1); 2213 } 2214 passiveport = port; 2215 return (0); 2216 } 2217 2218 /* 2219 * Note: a response of 425 is not mentioned as a possible response to 2220 * the PASV command in RFC959. However, it has been blessed as 2221 * a legitimate response by Jon Postel in a telephone conversation 2222 * with Rick Adams on 25 Jan 89. 2223 */ 2224 void 2225 passive(void) 2226 { 2227 int len; 2228 char *p, *a; 2229 2230 if (pdata >= 0) 2231 close(pdata); 2232 pdata = socket(AF_INET, SOCK_STREAM, 0); 2233 if (pdata < 0 || !logged_in) { 2234 perror_reply(425, "Can't open passive connection"); 2235 return; 2236 } 2237 pasv_addr = ctrl_addr; 2238 2239 if (bind_pasv_addr() < 0) 2240 goto pasv_error; 2241 len = pasv_addr.su_len; 2242 if (getsockname(pdata, (struct sockaddr *) &pasv_addr.si_su, &len) < 0) 2243 goto pasv_error; 2244 pasv_addr.su_len = len; 2245 if (listen(pdata, 1) < 0) 2246 goto pasv_error; 2247 a = (char *) &pasv_addr.su_addr; 2248 p = (char *) &pasv_addr.su_port; 2249 2250 #define UC(b) (((int) b) & 0xff) 2251 2252 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 2253 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 2254 return; 2255 2256 pasv_error: 2257 (void) close(pdata); 2258 pdata = -1; 2259 perror_reply(425, "Can't open passive connection"); 2260 return; 2261 } 2262 2263 /* 2264 * convert protocol identifier to/from AF 2265 */ 2266 int 2267 lpsvproto2af(int proto) 2268 { 2269 2270 switch (proto) { 2271 case 4: 2272 return AF_INET; 2273 #ifdef INET6 2274 case 6: 2275 return AF_INET6; 2276 #endif 2277 default: 2278 return -1; 2279 } 2280 } 2281 2282 int 2283 af2lpsvproto(int af) 2284 { 2285 2286 switch (af) { 2287 case AF_INET: 2288 return 4; 2289 #ifdef INET6 2290 case AF_INET6: 2291 return 6; 2292 #endif 2293 default: 2294 return -1; 2295 } 2296 } 2297 2298 int 2299 epsvproto2af(int proto) 2300 { 2301 2302 switch (proto) { 2303 case 1: 2304 return AF_INET; 2305 #ifdef INET6 2306 case 2: 2307 return AF_INET6; 2308 #endif 2309 default: 2310 return -1; 2311 } 2312 } 2313 2314 int 2315 af2epsvproto(int af) 2316 { 2317 2318 switch (af) { 2319 case AF_INET: 2320 return 1; 2321 #ifdef INET6 2322 case AF_INET6: 2323 return 2; 2324 #endif 2325 default: 2326 return -1; 2327 } 2328 } 2329 2330 /* 2331 * 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...) 2332 * 229 Entering Extended Passive Mode (|||port|) 2333 */ 2334 void 2335 long_passive(char *cmd, int pf) 2336 { 2337 int len; 2338 char *p, *a; 2339 2340 if (!logged_in) { 2341 syslog(LOG_NOTICE, "long passive but not logged in"); 2342 reply(503, "Login with USER first."); 2343 return; 2344 } 2345 2346 if (pf != PF_UNSPEC && ctrl_addr.su_family != pf) { 2347 /* 2348 * XXX: only EPRT/EPSV ready clients will understand this 2349 */ 2350 if (strcmp(cmd, "EPSV") != 0) 2351 reply(501, "Network protocol mismatch"); /*XXX*/ 2352 else 2353 epsv_protounsupp("Network protocol mismatch"); 2354 2355 return; 2356 } 2357 2358 if (pdata >= 0) 2359 close(pdata); 2360 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 2361 if (pdata < 0) { 2362 perror_reply(425, "Can't open passive connection"); 2363 return; 2364 } 2365 pasv_addr = ctrl_addr; 2366 if (bind_pasv_addr() < 0) 2367 goto pasv_error; 2368 len = pasv_addr.su_len; 2369 if (getsockname(pdata, (struct sockaddr *) &pasv_addr.si_su, &len) < 0) 2370 goto pasv_error; 2371 pasv_addr.su_len = len; 2372 if (listen(pdata, 1) < 0) 2373 goto pasv_error; 2374 p = (char *) &pasv_addr.su_port; 2375 2376 #define UC(b) (((int) b) & 0xff) 2377 2378 if (strcmp(cmd, "LPSV") == 0) { 2379 switch (pasv_addr.su_family) { 2380 case AF_INET: 2381 a = (char *) &pasv_addr.su_addr; 2382 reply(228, 2383 "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)", 2384 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2385 2, UC(p[0]), UC(p[1])); 2386 return; 2387 #ifdef INET6 2388 case AF_INET6: 2389 a = (char *) &pasv_addr.su_6addr; 2390 reply(228, 2391 "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)", 2392 6, 16, 2393 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2394 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]), 2395 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]), 2396 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]), 2397 2, UC(p[0]), UC(p[1])); 2398 return; 2399 #endif 2400 } 2401 #undef UC 2402 } else if (strcmp(cmd, "EPSV") == 0) { 2403 switch (pasv_addr.su_family) { 2404 case AF_INET: 2405 #ifdef INET6 2406 case AF_INET6: 2407 #endif 2408 reply(229, "Entering Extended Passive Mode (|||%d|)", 2409 ntohs(pasv_addr.su_port)); 2410 return; 2411 } 2412 } else { 2413 /* more proper error code? */ 2414 } 2415 2416 pasv_error: 2417 (void) close(pdata); 2418 pdata = -1; 2419 perror_reply(425, "Can't open passive connection"); 2420 return; 2421 } 2422 2423 int 2424 extended_port(const char *arg) 2425 { 2426 char *tmp = NULL; 2427 char *result[3]; 2428 char *p, *q; 2429 char delim; 2430 struct addrinfo hints; 2431 struct addrinfo *res = NULL; 2432 int i; 2433 unsigned long proto; 2434 2435 tmp = xstrdup(arg); 2436 p = tmp; 2437 delim = p[0]; 2438 p++; 2439 memset(result, 0, sizeof(result)); 2440 for (i = 0; i < 3; i++) { 2441 q = strchr(p, delim); 2442 if (!q || *q != delim) 2443 goto parsefail; 2444 *q++ = '\0'; 2445 result[i] = p; 2446 p = q; 2447 } 2448 2449 /* some more sanity checks */ 2450 p = NULL; 2451 (void)strtoul(result[2], &p, 10); 2452 if (!*result[2] || *p) 2453 goto parsefail; 2454 p = NULL; 2455 proto = strtoul(result[0], &p, 10); 2456 if (!*result[0] || *p) 2457 goto protounsupp; 2458 2459 memset(&hints, 0, sizeof(hints)); 2460 hints.ai_family = epsvproto2af((int)proto); 2461 if (hints.ai_family < 0) 2462 goto protounsupp; 2463 hints.ai_socktype = SOCK_STREAM; 2464 hints.ai_flags = AI_NUMERICHOST; 2465 if (getaddrinfo(result[1], result[2], &hints, &res)) 2466 goto parsefail; 2467 if (res->ai_next) 2468 goto parsefail; 2469 if (sizeof(data_dest) < res->ai_addrlen) 2470 goto parsefail; 2471 memcpy(&data_dest, res->ai_addr, res->ai_addrlen); 2472 #ifdef INET6 2473 if (his_addr.su_family == AF_INET6 && 2474 data_dest.su_family == AF_INET6) { 2475 /* XXX: more sanity checks! */ 2476 data_dest.su_scope_id = his_addr.su_scope_id; 2477 } 2478 #endif 2479 2480 if (tmp != NULL) 2481 free(tmp); 2482 if (res) 2483 freeaddrinfo(res); 2484 return 0; 2485 2486 parsefail: 2487 reply(500, "Invalid argument, rejected."); 2488 usedefault = 1; 2489 if (tmp != NULL) 2490 free(tmp); 2491 if (res) 2492 freeaddrinfo(res); 2493 return -1; 2494 2495 protounsupp: 2496 epsv_protounsupp("Protocol not supported"); 2497 usedefault = 1; 2498 if (tmp != NULL) 2499 free(tmp); 2500 if (res) 2501 freeaddrinfo(res); 2502 return -1; 2503 } 2504 2505 /* 2506 * 522 Protocol not supported (proto,...) 2507 * as we assume address family for control and data connections are the same, 2508 * we do not return the list of address families we support - instead, we 2509 * return the address family of the control connection. 2510 */ 2511 void 2512 epsv_protounsupp(const char *message) 2513 { 2514 int proto; 2515 2516 proto = af2epsvproto(ctrl_addr.su_family); 2517 if (proto < 0) 2518 reply(501, "%s", message); /* XXX */ 2519 else 2520 reply(522, "%s, use (%d)", message, proto); 2521 } 2522 2523 /* 2524 * Generate unique name for file with basename "local". 2525 * The file named "local" is already known to exist. 2526 * Generates failure reply on error. 2527 * 2528 * XXX: this function should under go changes similar to 2529 * the mktemp(3)/mkstemp(3) changes. 2530 */ 2531 static char * 2532 gunique(const char *local) 2533 { 2534 static char new[MAXPATHLEN]; 2535 struct stat st; 2536 char *cp; 2537 int count; 2538 2539 cp = strrchr(local, '/'); 2540 if (cp) 2541 *cp = '\0'; 2542 if (stat(cp ? local : ".", &st) < 0) { 2543 perror_reply(553, cp ? local : "."); 2544 return (NULL); 2545 } 2546 if (cp) 2547 *cp = '/'; 2548 for (count = 1; count < 100; count++) { 2549 (void)snprintf(new, sizeof(new) - 1, "%s.%d", local, count); 2550 if (stat(new, &st) < 0) 2551 return (new); 2552 } 2553 reply(452, "Unique file name cannot be created."); 2554 return (NULL); 2555 } 2556 2557 /* 2558 * Format and send reply containing system error number. 2559 */ 2560 void 2561 perror_reply(int code, const char *string) 2562 { 2563 int save_errno; 2564 2565 save_errno = errno; 2566 reply(code, "%s: %s.", string, strerror(errno)); 2567 errno = save_errno; 2568 } 2569 2570 static char *onefile[] = { 2571 "", 2572 0 2573 }; 2574 2575 void 2576 send_file_list(const char *whichf) 2577 { 2578 struct stat st; 2579 DIR *dirp = NULL; 2580 struct dirent *dir; 2581 FILE *dout = NULL; 2582 char **dirlist, *dirname, *p; 2583 int simple = 0; 2584 int freeglob = 0; 2585 glob_t gl; 2586 off_t b; 2587 2588 #ifdef __GNUC__ 2589 (void) &dout; 2590 (void) &dirlist; 2591 (void) &simple; 2592 (void) &freeglob; 2593 #endif 2594 2595 p = NULL; 2596 if (strpbrk(whichf, "~{[*?") != NULL) { 2597 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 2598 2599 memset(&gl, 0, sizeof(gl)); 2600 freeglob = 1; 2601 if (glob(whichf, flags, 0, &gl)) { 2602 reply(550, "not found"); 2603 goto out; 2604 } else if (gl.gl_pathc == 0) { 2605 errno = ENOENT; 2606 perror_reply(550, whichf); 2607 goto out; 2608 } 2609 dirlist = gl.gl_pathv; 2610 } else { 2611 p = xstrdup(whichf); 2612 onefile[0] = p; 2613 dirlist = onefile; 2614 simple = 1; 2615 } 2616 /* XXX: } for vi sm */ 2617 2618 if (setjmp(urgcatch)) { 2619 transflag = 0; 2620 goto out; 2621 } 2622 while ((dirname = *dirlist++) != NULL) { 2623 int trailingslash = 0; 2624 2625 if (stat(dirname, &st) < 0) { 2626 /* 2627 * If user typed "ls -l", etc, and the client 2628 * used NLST, do what the user meant. 2629 */ 2630 /* XXX: nuke this support? */ 2631 if (dirname[0] == '-' && *dirlist == NULL && 2632 transflag == 0) { 2633 char *argv[] = { INTERNAL_LS, "", NULL }; 2634 2635 argv[1] = dirname; 2636 retrieve(argv, dirname); 2637 goto out; 2638 } 2639 perror_reply(550, whichf); 2640 goto cleanup_send_file_list; 2641 } 2642 2643 if (S_ISREG(st.st_mode)) { 2644 if (dout == NULL) { 2645 dout = dataconn("file list", (off_t)-1, "w"); 2646 if (dout == NULL) 2647 goto out; 2648 transflag++; 2649 } 2650 b = fprintf(dout, "%s%s\n", dirname, 2651 type == TYPE_A ? "\r" : ""); 2652 total_bytes += b; 2653 total_bytes_out += b; 2654 byte_count += strlen(dirname) + 1; 2655 continue; 2656 } else if (!S_ISDIR(st.st_mode)) 2657 continue; 2658 2659 if (dirname[strlen(dirname) - 1] == '/') 2660 trailingslash++; 2661 2662 if ((dirp = opendir(dirname)) == NULL) 2663 continue; 2664 2665 while ((dir = readdir(dirp)) != NULL) { 2666 char nbuf[MAXPATHLEN]; 2667 2668 if (ISDOTDIR(dir->d_name) || ISDOTDOTDIR(dir->d_name)) 2669 continue; 2670 2671 (void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname, 2672 trailingslash ? "" : "/", dir->d_name); 2673 2674 /* 2675 * We have to do a stat to ensure it's 2676 * not a directory or special file. 2677 */ 2678 /* XXX: follow RFC959 and filter out non files ? */ 2679 if (simple || (stat(nbuf, &st) == 0 && 2680 S_ISREG(st.st_mode))) { 2681 char *p; 2682 2683 if (dout == NULL) { 2684 dout = dataconn("file list", (off_t)-1, 2685 "w"); 2686 if (dout == NULL) 2687 goto out; 2688 transflag++; 2689 } 2690 p = nbuf; 2691 if (nbuf[0] == '.' && nbuf[1] == '/') 2692 p = &nbuf[2]; 2693 b = fprintf(dout, "%s%s\n", p, 2694 type == TYPE_A ? "\r" : ""); 2695 total_bytes += b; 2696 total_bytes_out += b; 2697 byte_count += strlen(nbuf) + 1; 2698 } 2699 } 2700 (void) closedir(dirp); 2701 } 2702 2703 if (dout == NULL) 2704 reply(550, "No files found."); 2705 else if (ferror(dout) != 0) 2706 perror_reply(550, "Data connection"); 2707 else 2708 reply(226, "Transfer complete."); 2709 2710 cleanup_send_file_list: 2711 transflag = 0; 2712 closedataconn(dout); 2713 out: 2714 total_xfers++; 2715 total_xfers_out++; 2716 if (p) 2717 free(p); 2718 if (freeglob) 2719 globfree(&gl); 2720 } 2721 2722 char * 2723 conffilename(const char *s) 2724 { 2725 static char filename[MAXPATHLEN]; 2726 2727 if (*s == '/') 2728 strlcpy(filename, s, sizeof(filename)); 2729 else 2730 (void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s); 2731 return (filename); 2732 } 2733 2734 /* 2735 * logcmd -- 2736 * based on the arguments, syslog a message: 2737 * if bytes != -1 "<command> <file1> = <bytes> bytes" 2738 * else if file2 != NULL "<command> <file1> <file2>" 2739 * else "<command> <file1>" 2740 * if elapsed != NULL, append "in xxx.yyy seconds" 2741 * if error != NULL, append ": " + error 2742 */ 2743 void 2744 logcmd(const char *command, off_t bytes, const char *file1, const char *file2, 2745 const struct timeval *elapsed, const char *error) 2746 { 2747 char buf[MAXPATHLEN * 2 + 100], realfile[MAXPATHLEN]; 2748 const char *p; 2749 size_t len; 2750 2751 if (logging <=1) 2752 return; 2753 2754 if ((p = realpath(file1, realfile)) == NULL) 2755 p = file1; 2756 len = snprintf(buf, sizeof(buf), "%s %s", command, p); 2757 2758 if (bytes != (off_t)-1) { 2759 len += snprintf(buf + len, sizeof(buf) - len, 2760 " = " LLF " byte%s", (LLT) bytes, PLURAL(bytes)); 2761 } else if (file2 != NULL) { 2762 if ((p = realpath(file2, realfile)) == NULL) 2763 p = file2; 2764 len += snprintf(buf + len, sizeof(buf) - len, " %s", p); 2765 } 2766 2767 if (elapsed != NULL) { 2768 len += snprintf(buf + len, sizeof(buf) - len, 2769 " in %ld.%.03d seconds", elapsed->tv_sec, 2770 (int)(elapsed->tv_usec / 1000)); 2771 } 2772 2773 if (error != NULL) 2774 len += snprintf(buf + len, sizeof(buf) - len, ": %s", error); 2775 2776 syslog(LOG_INFO, "%s", buf); 2777 } 2778 2779 /* 2780 * determine if password is valid for user given in pw 2781 * returns 1 if ok, 0 if not. 2782 */ 2783 int 2784 valid_passwd(const struct passwd *pw, const char *password) 2785 { 2786 char *orig, *new; 2787 int rv; 2788 2789 /* save existing password */ 2790 orig = pw->pw_passwd; 2791 /* don't let people without passwords in */ 2792 if (orig[0] == '\0') 2793 return 0; 2794 /* encrypt given password */ 2795 new = crypt(password, orig); 2796 /* compare */ 2797 rv = strcmp(new, orig) == 0; 2798 return (rv); 2799 } 2800 2801 char * 2802 xstrdup(const char *s) 2803 { 2804 char *new = strdup(s); 2805 2806 if (new == NULL) 2807 fatal("Local resource failure: malloc"); 2808 /* NOTREACHED */ 2809 return (new); 2810 } 2811 2812 /* 2813 * As per fprintf(), but increment total_bytes and total_bytes_out, 2814 * by the appropriate amount. 2815 */ 2816 void 2817 cprintf(FILE *fd, const char *fmt, ...) 2818 { 2819 off_t b; 2820 va_list ap; 2821 2822 va_start(ap, fmt); 2823 b = vfprintf(fd, fmt, ap); 2824 total_bytes += b; 2825 total_bytes_out += b; 2826 } 2827
Indexes created Wed Sep 24 15:09:51 GMT 2025