ftpd.c revision 1.69
1 /* $NetBSD: ftpd.c,v 1.69 1999/08/25 16:23:52 christos 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 1.69 1999/08/25 16:23:52 christos 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[0] == '#') 632 continue; 633 perm = strtok(NULL, " \t\n"); 634 if (fnmatch(glob, name, 0) == 0) { 635 if (perm != NULL && 636 ((strcasecmp(perm, "allow") == 0) || 637 (strcasecmp(perm, "yes") == 0))) 638 retval = TRUE; 639 else if (perm != NULL && 640 ((strcasecmp(perm, "deny") == 0) || 641 (strcasecmp(perm, "no") == 0))) 642 retval = FALSE; 643 else 644 retval = !def; 645 break; 646 } 647 } 648 (void) fclose(fd); 649 return (retval); 650 } 651 652 /* 653 * Check if user is allowed by /etc/ftpusers 654 * returns 0 for yes, 1 for no 655 */ 656 int 657 checkaccess(name) 658 const char *name; 659 { 660 661 return (! checkuser(_PATH_FTPUSERS, name, TRUE, FALSE)); 662 } 663 664 /* 665 * Terminate login as previous user, if any, resetting state; 666 * used when USER command is given or login fails. 667 */ 668 static void 669 end_login() 670 { 671 672 (void) seteuid((uid_t)0); 673 if (logged_in) 674 logwtmp(ttyline, "", ""); 675 pw = NULL; 676 logged_in = 0; 677 guest = 0; 678 dochroot = 0; 679 } 680 681 void 682 pass(passwd) 683 const char *passwd; 684 { 685 int rval; 686 FILE *fd; 687 char const *cp, *shell, *home; 688 689 if (logged_in || askpasswd == 0) { 690 reply(503, "Login with USER first."); 691 return; 692 } 693 askpasswd = 0; 694 if (!guest) { /* "ftp" is only account allowed no password */ 695 if (pw == NULL) { 696 rval = 1; /* failure below */ 697 goto skip; 698 } 699 #ifdef KERBEROS 700 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 701 rval = 0; 702 goto skip; 703 } 704 #endif 705 #ifdef KERBEROS5 706 if (klogin(pw, "", hostname, (char *)passwd) == 0) { 707 rval = 0; 708 goto skip; 709 } 710 #endif 711 #ifdef SKEY 712 if (skey_haskey(pw->pw_name) == 0) { 713 char *p; 714 int r; 715 716 p = xstrdup(passwd); 717 r = skey_passcheck(pw->pw_name, p); 718 free(p); 719 if (r != -1) { 720 rval = 0; 721 goto skip; 722 } 723 } 724 #endif 725 if (!sflag && *pw->pw_passwd != '\0' && 726 !strcmp(crypt(passwd, pw->pw_passwd), pw->pw_passwd)) { 727 rval = 0; 728 goto skip; 729 } 730 rval = 1; 731 732 skip: 733 if (pw != NULL && pw->pw_expire && time(NULL) >= pw->pw_expire) 734 rval = 2; 735 /* 736 * If rval > 0, the user failed the authentication check 737 * above. If rval == 0, either Kerberos or local authentication 738 * succeeded. 739 */ 740 if (rval) { 741 reply(530, rval == 2 ? "Password expired." : 742 "Login incorrect."); 743 if (logging) { 744 syslog(LOG_NOTICE, 745 "FTP LOGIN FAILED FROM %s", remotehost); 746 syslog(LOG_AUTHPRIV | LOG_NOTICE, 747 "FTP LOGIN FAILED FROM %s, %s", 748 remotehost, curname); 749 } 750 pw = NULL; 751 if (login_attempts++ >= 5) { 752 syslog(LOG_NOTICE, 753 "repeated login failures from %s", 754 remotehost); 755 exit(0); 756 } 757 return; 758 } 759 } 760 761 /* password was ok; see if anything else prevents login */ 762 if (checkaccess(pw->pw_name)) { 763 reply(530, "User %s may not use FTP.", pw->pw_name); 764 if (logging) 765 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 766 remotehost, pw->pw_name); 767 pw = (struct passwd *) NULL; 768 return; 769 } 770 /* check for valid shell, if not guest user */ 771 if ((shell = pw->pw_shell) == NULL || *shell == 0) 772 shell = _PATH_BSHELL; 773 while ((cp = getusershell()) != NULL) 774 if (strcmp(cp, shell) == 0) 775 break; 776 endusershell(); 777 if (cp == NULL && guest == 0) { 778 reply(530, "User %s may not use FTP.", pw->pw_name); 779 if (logging) 780 syslog(LOG_NOTICE, "FTP LOGIN REFUSED FROM %s, %s", 781 remotehost, pw->pw_name); 782 pw = (struct passwd *) NULL; 783 return; 784 } 785 786 login_attempts = 0; /* this time successful */ 787 if (setegid((gid_t)pw->pw_gid) < 0) { 788 reply(550, "Can't set gid."); 789 return; 790 } 791 (void) initgroups(pw->pw_name, pw->pw_gid); 792 793 /* open wtmp before chroot */ 794 logwtmp(ttyline, pw->pw_name, remotehost); 795 logged_in = 1; 796 797 dochroot = checkuser(_PATH_FTPCHROOT, pw->pw_name, FALSE, FALSE); 798 799 /* parse ftpd.conf, setting up various parameters */ 800 if (guest) 801 parse_conf(CLASS_GUEST); 802 else if (dochroot) 803 parse_conf(CLASS_CHROOT); 804 else 805 parse_conf(CLASS_REAL); 806 807 home = "/"; 808 if (guest) { 809 /* 810 * We MUST do a chdir() after the chroot. Otherwise 811 * the old current directory will be accessible as "." 812 * outside the new root! 813 */ 814 if (chroot(anondir ? anondir : pw->pw_dir) < 0 || 815 chdir("/") < 0) { 816 reply(550, "Can't set guest privileges."); 817 goto bad; 818 } 819 } else if (dochroot) { 820 if (chroot(pw->pw_dir) < 0 || chdir("/") < 0) { 821 reply(550, "Can't change root."); 822 goto bad; 823 } 824 } else if (chdir(pw->pw_dir) < 0) { 825 if (chdir("/") < 0) { 826 reply(530, "User %s: can't change directory to %s.", 827 pw->pw_name, pw->pw_dir); 828 goto bad; 829 } else 830 lreply(230, "No directory! Logging in with home=/"); 831 } else 832 home = pw->pw_dir; 833 if (seteuid((uid_t)pw->pw_uid) < 0) { 834 reply(550, "Can't set uid."); 835 goto bad; 836 } 837 setenv("HOME", home, 1); 838 839 840 /* 841 * Display a login message, if it exists. 842 * N.B. reply(230,) must follow the message. 843 */ 844 if ((fd = fopen(conffilename(_PATH_FTPLOGINMESG), "r")) != NULL) { 845 char *cp, line[LINE_MAX]; 846 847 lreply(230, ""); 848 while (fgets(line, sizeof(line), fd) != NULL) { 849 if ((cp = strchr(line, '\n')) != NULL) 850 *cp = '\0'; 851 lreply(0, "%s", line); 852 } 853 (void) fflush(stdout); 854 (void) fclose(fd); 855 } 856 show_chdir_messages(230); 857 if (guest) { 858 reply(230, "Guest login ok, access restrictions apply."); 859 #ifdef HASSETPROCTITLE 860 snprintf(proctitle, sizeof(proctitle), 861 "%s: anonymous/%.*s", remotehost, 862 (int) (sizeof(proctitle) - sizeof(remotehost) - 863 sizeof(": anonymous/")), passwd); 864 setproctitle(proctitle); 865 #endif /* HASSETPROCTITLE */ 866 if (logging) 867 syslog(LOG_INFO, "ANONYMOUS FTP LOGIN FROM %s, %s", 868 remotehost, passwd); 869 } else { 870 reply(230, "User %s logged in.", pw->pw_name); 871 #ifdef HASSETPROCTITLE 872 snprintf(proctitle, sizeof(proctitle), 873 "%s: %s", remotehost, pw->pw_name); 874 setproctitle(proctitle); 875 #endif /* HASSETPROCTITLE */ 876 if (logging) 877 syslog(LOG_INFO, "FTP LOGIN FROM %s as %s", 878 remotehost, pw->pw_name); 879 } 880 (void) umask(curclass.umask); 881 return; 882 bad: 883 /* Forget all about it... */ 884 end_login(); 885 } 886 887 void 888 retrieve(cmd, name) 889 const char *cmd, *name; 890 { 891 FILE *fin = NULL, *dout; 892 struct stat st; 893 int (*closefunc) __P((FILE *)) = NULL; 894 int log, sendrv, closerv, stderrfd, isconversion, isdata, isls; 895 struct timeval start, finish, td, *tdp; 896 char tline[BUFSIZ]; 897 const char *dispname; 898 899 sendrv = closerv = stderrfd = -1; 900 isconversion = isdata = isls = log = 0; 901 tdp = NULL; 902 dispname = name; 903 if (cmd == NULL) { 904 log = 1; 905 isdata = 1; 906 fin = fopen(name, "r"); 907 closefunc = fclose; 908 if (fin == NULL) 909 cmd = do_conversion(name); 910 if (cmd != NULL) { 911 isconversion++; 912 syslog(LOG_INFO, "get command: '%s'", cmd); 913 } 914 } 915 if (cmd != NULL) { 916 char temp[MAXPATHLEN + 1]; 917 918 if (strncmp(cmd, INTERNAL_LS, sizeof(INTERNAL_LS) - 1) == 0 && 919 strchr(" \t\n", cmd[sizeof(INTERNAL_LS) - 1]) != NULL) { 920 isls = 1; 921 stderrfd = -1; 922 } else { 923 (void)snprintf(temp, sizeof(temp), "%s", TMPFILE); 924 stderrfd = mkstemp(temp); 925 if (stderrfd != -1) 926 (void)unlink(temp); 927 } 928 (void)snprintf(tline, sizeof(tline), cmd, name); 929 dispname = tline; 930 fin = ftpd_popen(tline, "r", stderrfd); 931 closefunc = ftpd_pclose; 932 st.st_size = -1; 933 st.st_blksize = BUFSIZ; 934 } 935 if (fin == NULL) { 936 if (errno != 0) { 937 perror_reply(550, dispname); 938 if (log) 939 logcmd("get", -1, name, NULL, NULL, 940 strerror(errno)); 941 } 942 if (stderrfd != -1) 943 (void)close(stderrfd); 944 return; 945 } 946 byte_count = -1; 947 if (cmd == NULL 948 && (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode))) { 949 reply(550, "%s: not a plain file.", dispname); 950 goto done; 951 } 952 if (restart_point) { 953 if (type == TYPE_A) { 954 off_t i; 955 int c; 956 957 for (i = 0; i < restart_point; i++) { 958 if ((c=getc(fin)) == EOF) { 959 perror_reply(550, dispname); 960 goto done; 961 } 962 if (c == '\n') 963 i++; 964 } 965 } else if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 966 perror_reply(550, dispname); 967 goto done; 968 } 969 } 970 dout = dataconn(dispname, st.st_size, "w"); 971 if (dout == NULL) 972 goto done; 973 974 (void)gettimeofday(&start, NULL); 975 sendrv = send_data(fin, dout, st.st_blksize, isdata); 976 (void)gettimeofday(&finish, NULL); 977 (void) fclose(dout); 978 timersub(&finish, &start, &td); 979 tdp = &td; 980 data = -1; 981 pdata = -1; 982 done: 983 if (log) 984 logcmd("get", byte_count, name, NULL, tdp, NULL); 985 closerv = (*closefunc)(fin); 986 if (sendrv == 0) { 987 FILE *err; 988 struct stat sb; 989 990 if (!isls && cmd != NULL && closerv != 0) { 991 lreply(226, 992 "Command returned an exit status of %d", 993 closerv); 994 if (isconversion) 995 syslog(LOG_INFO, 996 "get command: '%s' returned %d", 997 cmd, closerv); 998 } 999 if (!isls && cmd != NULL && stderrfd != -1 && 1000 (fstat(stderrfd, &sb) == 0) && sb.st_size > 0 && 1001 ((err = fdopen(stderrfd, "r")) != NULL)) { 1002 char *cp, line[LINE_MAX]; 1003 1004 lreply(226, "Command error messages:"); 1005 rewind(err); 1006 while (fgets(line, sizeof(line), err) != NULL) { 1007 if ((cp = strchr(line, '\n')) != NULL) 1008 *cp = '\0'; 1009 lreply(0, " %s", line); 1010 } 1011 (void) fflush(stdout); 1012 (void) fclose(err); 1013 /* a reply(226,) must follow */ 1014 } 1015 reply(226, "Transfer complete."); 1016 } 1017 if (stderrfd != -1) 1018 (void)close(stderrfd); 1019 } 1020 1021 void 1022 store(name, mode, unique) 1023 const char *name, *mode; 1024 int unique; 1025 { 1026 FILE *fout, *din; 1027 struct stat st; 1028 int (*closefunc) __P((FILE *)); 1029 struct timeval start, finish, td, *tdp; 1030 char *desc; 1031 1032 desc = (*mode == 'w') ? "put" : "append"; 1033 if (unique && stat(name, &st) == 0 && 1034 (name = gunique(name)) == NULL) { 1035 logcmd(desc, -1, name, NULL, NULL, "cannot create unique file"); 1036 return; 1037 } 1038 1039 if (restart_point) 1040 mode = "r+"; 1041 fout = fopen(name, mode); 1042 closefunc = fclose; 1043 tdp = NULL; 1044 if (fout == NULL) { 1045 perror_reply(553, name); 1046 logcmd(desc, -1, name, NULL, NULL, strerror(errno)); 1047 return; 1048 } 1049 byte_count = -1; 1050 if (restart_point) { 1051 if (type == TYPE_A) { 1052 off_t i; 1053 int c; 1054 1055 for (i = 0; i < restart_point; i++) { 1056 if ((c=getc(fout)) == EOF) { 1057 perror_reply(550, name); 1058 goto done; 1059 } 1060 if (c == '\n') 1061 i++; 1062 } 1063 /* 1064 * We must do this seek to "current" position 1065 * because we are changing from reading to 1066 * writing. 1067 */ 1068 if (fseek(fout, 0L, SEEK_CUR) < 0) { 1069 perror_reply(550, name); 1070 goto done; 1071 } 1072 } else if (lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1073 perror_reply(550, name); 1074 goto done; 1075 } 1076 } 1077 din = dataconn(name, (off_t)-1, "r"); 1078 if (din == NULL) 1079 goto done; 1080 (void)gettimeofday(&start, NULL); 1081 if (receive_data(din, fout) == 0) { 1082 if (unique) 1083 reply(226, "Transfer complete (unique file name:%s).", 1084 name); 1085 else 1086 reply(226, "Transfer complete."); 1087 } 1088 (void)gettimeofday(&finish, NULL); 1089 (void) fclose(din); 1090 timersub(&finish, &start, &td); 1091 tdp = &td; 1092 data = -1; 1093 pdata = -1; 1094 done: 1095 logcmd(desc, byte_count, name, NULL, tdp, NULL); 1096 (*closefunc)(fout); 1097 } 1098 1099 static FILE * 1100 getdatasock(mode) 1101 const char *mode; 1102 { 1103 int on = 1, s, t, tries; 1104 1105 if (data >= 0) 1106 return (fdopen(data, mode)); 1107 (void) seteuid((uid_t)0); 1108 s = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 1109 if (s < 0) 1110 goto bad; 1111 if (setsockopt(s, SOL_SOCKET, SO_REUSEADDR, 1112 (char *) &on, sizeof(on)) < 0) 1113 goto bad; 1114 if (setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1115 (char *) &on, sizeof(on)) < 0) 1116 goto bad; 1117 /* anchor socket to avoid multi-homing problems */ 1118 data_source = ctrl_addr; 1119 data_source.su_port = htons(20); /* ftp-data port */ 1120 for (tries = 1; ; tries++) { 1121 if (bind(s, (struct sockaddr *)&data_source, 1122 data_source.su_len) >= 0) 1123 break; 1124 if (errno != EADDRINUSE || tries > 10) 1125 goto bad; 1126 sleep(tries); 1127 } 1128 (void) seteuid((uid_t)pw->pw_uid); 1129 #ifdef IP_TOS 1130 if (ctrl_addr.su_family == AF_INET) { 1131 on = IPTOS_THROUGHPUT; 1132 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&on, 1133 sizeof(int)) < 0) 1134 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); 1135 } 1136 #endif 1137 return (fdopen(s, mode)); 1138 bad: 1139 /* Return the real value of errno (close may change it) */ 1140 t = errno; 1141 (void) seteuid((uid_t)pw->pw_uid); 1142 (void) close(s); 1143 errno = t; 1144 return (NULL); 1145 } 1146 1147 static FILE * 1148 dataconn(name, size, mode) 1149 const char *name; 1150 off_t size; 1151 const char *mode; 1152 { 1153 char sizebuf[32]; 1154 FILE *file; 1155 int retry = 0, tos, keepalive; 1156 1157 file_size = size; 1158 byte_count = 0; 1159 if (size != (off_t) -1) 1160 (void)snprintf(sizebuf, sizeof(sizebuf), " (%qd byte%s)", 1161 (qdfmt_t)size, PLURAL(size)); 1162 else 1163 sizebuf[0] = '\0'; 1164 if (pdata >= 0) { 1165 union sockunion from; 1166 int s, fromlen = sizeof(from); 1167 1168 (void) alarm(curclass.timeout); 1169 s = accept(pdata, (struct sockaddr *)&from, &fromlen); 1170 (void) alarm(0); 1171 if (s < 0) { 1172 reply(425, "Can't open data connection."); 1173 (void) close(pdata); 1174 pdata = -1; 1175 return (NULL); 1176 } 1177 (void) close(pdata); 1178 pdata = s; 1179 switch (from.su_family) { 1180 case AF_INET: 1181 #ifdef IP_TOS 1182 tos = IPTOS_THROUGHPUT; 1183 (void) setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 1184 sizeof(int)); 1185 break; 1186 #endif 1187 } 1188 /* Set keepalives on the socket to detect dropped conns. */ 1189 #ifdef SO_KEEPALIVE 1190 keepalive = 1; 1191 (void) setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, 1192 (char *)&keepalive, sizeof(int)); 1193 #endif 1194 reply(150, "Opening %s mode data connection for '%s'%s.", 1195 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1196 return (fdopen(pdata, mode)); 1197 } 1198 if (data >= 0) { 1199 reply(125, "Using existing data connection for '%s'%s.", 1200 name, sizebuf); 1201 usedefault = 1; 1202 return (fdopen(data, mode)); 1203 } 1204 if (usedefault) 1205 data_dest = his_addr; 1206 usedefault = 1; 1207 file = getdatasock(mode); 1208 if (file == NULL) { 1209 char hbuf[INET6_ADDRSTRLEN]; 1210 char pbuf[10]; 1211 getnameinfo((struct sockaddr *)&data_source, data_source.su_len, 1212 hbuf, sizeof(hbuf), pbuf, sizeof(pbuf), 1213 NI_NUMERICHOST | NI_NUMERICSERV); 1214 reply(425, "Can't create data socket (%s,%s): %s.", 1215 hbuf, pbuf, strerror(errno)); 1216 return (NULL); 1217 } 1218 data = fileno(file); 1219 while (connect(data, (struct sockaddr *)&data_dest, 1220 data_dest.su_len) < 0) { 1221 if (errno == EADDRINUSE && retry < swaitmax) { 1222 sleep((unsigned) swaitint); 1223 retry += swaitint; 1224 continue; 1225 } 1226 perror_reply(425, "Can't build data connection"); 1227 (void) fclose(file); 1228 data = -1; 1229 return (NULL); 1230 } 1231 reply(150, "Opening %s mode data connection for '%s'%s.", 1232 type == TYPE_A ? "ASCII" : "BINARY", name, sizebuf); 1233 return (file); 1234 } 1235 1236 /* 1237 * Tranfer the contents of "instr" to "outstr" peer using the appropriate 1238 * encapsulation of the data subject * to Mode, Structure, and Type. 1239 * 1240 * NB: Form isn't handled. 1241 */ 1242 static int 1243 send_data(instr, outstr, blksize, isdata) 1244 FILE *instr, *outstr; 1245 off_t blksize; 1246 int isdata; 1247 { 1248 int c, cnt, filefd, netfd, rval; 1249 char *buf; 1250 1251 transflag = 1; 1252 rval = -1; 1253 buf = NULL; 1254 if (setjmp(urgcatch)) 1255 goto cleanup_send_data; 1256 1257 switch (type) { 1258 1259 case TYPE_A: 1260 (void) alarm(curclass.timeout); 1261 while ((c = getc(instr)) != EOF) { 1262 byte_count++; 1263 if (c == '\n') { 1264 if (ferror(outstr)) 1265 goto data_err; 1266 (void) putc('\r', outstr); 1267 if (isdata) { 1268 total_data_out++; 1269 total_data++; 1270 } 1271 total_bytes_out++; 1272 total_bytes++; 1273 } 1274 (void) putc(c, outstr); 1275 if (isdata) { 1276 total_data_out++; 1277 total_data++; 1278 } 1279 total_bytes_out++; 1280 total_bytes++; 1281 if ((byte_count % 4096) == 0) 1282 (void) alarm(curclass.timeout); 1283 } 1284 (void) alarm(0); 1285 fflush(outstr); 1286 if (ferror(instr)) 1287 goto file_err; 1288 if (ferror(outstr)) 1289 goto data_err; 1290 rval = 0; 1291 goto cleanup_send_data; 1292 1293 case TYPE_I: 1294 case TYPE_L: 1295 if ((buf = malloc((size_t)blksize)) == NULL) { 1296 perror_reply(451, "Local resource failure: malloc"); 1297 goto cleanup_send_data; 1298 } 1299 filefd = fileno(instr); 1300 netfd = fileno(outstr); 1301 (void) alarm(curclass.timeout); 1302 while ((cnt = read(filefd, buf, (size_t)blksize)) > 0) { 1303 if (write(netfd, buf, cnt) != cnt) 1304 goto data_err; 1305 (void) alarm(curclass.timeout); 1306 byte_count += cnt; 1307 if (isdata) { 1308 total_data_out += cnt; 1309 total_data += cnt; 1310 } 1311 total_bytes_out += cnt; 1312 total_bytes += cnt; 1313 } 1314 if (cnt < 0) 1315 goto file_err; 1316 rval = 0; 1317 goto cleanup_send_data; 1318 1319 default: 1320 reply(550, "Unimplemented TYPE %d in send_data", type); 1321 goto cleanup_send_data; 1322 } 1323 1324 data_err: 1325 (void) alarm(0); 1326 perror_reply(426, "Data connection"); 1327 goto cleanup_send_data; 1328 1329 file_err: 1330 (void) alarm(0); 1331 perror_reply(551, "Error on input file"); 1332 /* FALLTHROUGH */ 1333 1334 cleanup_send_data: 1335 (void) alarm(0); 1336 transflag = 0; 1337 if (buf) 1338 free(buf); 1339 if (isdata) { 1340 total_files_out++; 1341 total_files++; 1342 } 1343 total_xfers_out++; 1344 total_xfers++; 1345 return (rval); 1346 } 1347 1348 /* 1349 * Transfer data from peer to "outstr" using the appropriate encapulation of 1350 * the data subject to Mode, Structure, and Type. 1351 * 1352 * N.B.: Form isn't handled. 1353 */ 1354 static int 1355 receive_data(instr, outstr) 1356 FILE *instr, *outstr; 1357 { 1358 int c, cnt, bare_lfs, netfd, filefd, rval; 1359 char buf[BUFSIZ]; 1360 #ifdef __GNUC__ 1361 (void) &bare_lfs; 1362 #endif 1363 1364 bare_lfs = 0; 1365 transflag = 1; 1366 rval = -1; 1367 if (setjmp(urgcatch)) 1368 goto cleanup_recv_data; 1369 1370 switch (type) { 1371 1372 case TYPE_I: 1373 case TYPE_L: 1374 netfd = fileno(instr); 1375 filefd = fileno(outstr); 1376 (void) alarm(curclass.timeout); 1377 while ((cnt = read(netfd, buf, sizeof(buf))) > 0) { 1378 if (write(filefd, buf, cnt) != cnt) 1379 goto file_err; 1380 (void) alarm(curclass.timeout); 1381 byte_count += cnt; 1382 total_data_in += cnt; 1383 total_data += cnt; 1384 total_bytes_in += cnt; 1385 total_bytes += cnt; 1386 } 1387 if (cnt < 0) 1388 goto data_err; 1389 rval = 0; 1390 goto cleanup_recv_data; 1391 1392 case TYPE_E: 1393 reply(553, "TYPE E not implemented."); 1394 goto cleanup_recv_data; 1395 1396 case TYPE_A: 1397 (void) alarm(curclass.timeout); 1398 while ((c = getc(instr)) != EOF) { 1399 byte_count++; 1400 total_data_in++; 1401 total_data++; 1402 total_bytes_in++; 1403 total_bytes++; 1404 if ((byte_count % 4096) == 0) 1405 (void) alarm(curclass.timeout); 1406 if (c == '\n') 1407 bare_lfs++; 1408 while (c == '\r') { 1409 if (ferror(outstr)) 1410 goto data_err; 1411 if ((c = getc(instr)) != '\n') { 1412 byte_count++; 1413 total_data_in++; 1414 total_data++; 1415 total_bytes_in++; 1416 total_bytes++; 1417 if ((byte_count % 4096) == 0) 1418 (void) alarm(curclass.timeout); 1419 (void) putc ('\r', outstr); 1420 if (c == '\0' || c == EOF) 1421 goto contin2; 1422 } 1423 } 1424 (void) putc(c, outstr); 1425 contin2: ; 1426 } 1427 (void) alarm(0); 1428 fflush(outstr); 1429 if (ferror(instr)) 1430 goto data_err; 1431 if (ferror(outstr)) 1432 goto file_err; 1433 if (bare_lfs) { 1434 lreply(226, 1435 "WARNING! %d bare linefeeds received in ASCII mode", 1436 bare_lfs); 1437 lreply(0, "File may not have transferred correctly."); 1438 } 1439 rval = 0; 1440 goto cleanup_recv_data; 1441 1442 default: 1443 reply(550, "Unimplemented TYPE %d in receive_data", type); 1444 goto cleanup_recv_data; 1445 } 1446 1447 data_err: 1448 (void) alarm(0); 1449 perror_reply(426, "Data Connection"); 1450 goto cleanup_recv_data; 1451 1452 file_err: 1453 (void) alarm(0); 1454 perror_reply(452, "Error writing file"); 1455 goto cleanup_recv_data; 1456 1457 cleanup_recv_data: 1458 (void) alarm(0); 1459 transflag = 0; 1460 total_files_in++; 1461 total_files++; 1462 total_xfers_in++; 1463 total_xfers++; 1464 return (rval); 1465 } 1466 1467 void 1468 statfilecmd(filename) 1469 const char *filename; 1470 { 1471 FILE *fin; 1472 int c; 1473 char line[LINE_MAX]; 1474 1475 (void)snprintf(line, sizeof(line), "/bin/ls -lgA %s", filename); 1476 fin = ftpd_popen(line, "r", STDOUT_FILENO); 1477 lreply(211, "status of %s:", filename); 1478 while ((c = getc(fin)) != EOF) { 1479 if (c == '\n') { 1480 if (ferror(stdout)){ 1481 perror_reply(421, "control connection"); 1482 (void) ftpd_pclose(fin); 1483 dologout(1); 1484 /* NOTREACHED */ 1485 } 1486 if (ferror(fin)) { 1487 perror_reply(551, filename); 1488 (void) ftpd_pclose(fin); 1489 return; 1490 } 1491 (void) putc('\r', stdout); 1492 total_bytes++; 1493 total_bytes_out++; 1494 } 1495 (void) putc(c, stdout); 1496 total_bytes++; 1497 total_bytes_out++; 1498 } 1499 (void) ftpd_pclose(fin); 1500 reply(211, "End of Status"); 1501 } 1502 1503 void 1504 statcmd() 1505 { 1506 union sockunion *su = NULL; 1507 static char ntop_buf[INET6_ADDRSTRLEN]; 1508 u_char *a, *p; 1509 int ispassive; 1510 off_t b, otbi, otbo, otb; 1511 1512 a = p = (u_char *)NULL; 1513 1514 lreply(211, "%s FTP server status:", hostname); 1515 lreply(0, "%s", version); 1516 ntop_buf[0] = '\0'; 1517 if (!getnameinfo((struct sockaddr *)&his_addr, his_addr.su_len, 1518 ntop_buf, sizeof(ntop_buf), NULL, 0, NI_NUMERICHOST) 1519 && strcmp(remotehost, ntop_buf) != 0) { 1520 lreply(0, "Connected to %s (%s)", remotehost, ntop_buf); 1521 } else 1522 lreply(0, "Connected to %s", remotehost); 1523 if (logged_in) { 1524 if (guest) 1525 lreply(0, "Logged in anonymously"); 1526 else 1527 lreply(0, "Logged in as %s", pw->pw_name); 1528 } else if (askpasswd) 1529 lreply(0, "Waiting for password"); 1530 else 1531 lreply(0, "Waiting for user name"); 1532 b = printf(" TYPE: %s", typenames[type]); 1533 total_bytes += b; 1534 total_bytes_out += b; 1535 if (type == TYPE_A || type == TYPE_E) { 1536 b = printf(", FORM: %s", formnames[form]); 1537 total_bytes += b; 1538 total_bytes_out += b; 1539 } 1540 if (type == TYPE_L) { 1541 #if NBBY == 8 1542 b = printf(" %d", NBBY); 1543 #else 1544 /* XXX: `bytesize' needs to be defined in this case */ 1545 b = printf(" %d", bytesize); 1546 #endif 1547 total_bytes += b; 1548 total_bytes_out += b; 1549 } 1550 b = printf("; STRUcture: %s; transfer MODE: %s\r\n", 1551 strunames[stru], modenames[mode]); 1552 total_bytes += b; 1553 total_bytes_out += b; 1554 ispassive = 0; 1555 if (data != -1) { 1556 lreply(0, "Data connection open"); 1557 su = NULL; 1558 } else if (pdata != -1) { 1559 b = printf(" in Passive mode"); 1560 total_bytes += b; 1561 total_bytes_out += b; 1562 su = (union sockunion *)&pasv_addr; 1563 ispassive = 1; 1564 goto printaddr; 1565 } else if (usedefault == 0) { 1566 if (epsvall) { 1567 b = printf("211- EPSV only mode (EPSV ALL )\r\n"); 1568 total_bytes += b; 1569 total_bytes_out += b; 1570 goto epsvonly; 1571 } 1572 b = printf("211- %s", 1573 (data_dest.su_family == AF_INET) ? "PORT" : "LPRT"); 1574 total_bytes += b; 1575 total_bytes_out += b; 1576 su = (union sockunion *)&data_dest; 1577 printaddr: 1578 /* PASV/PORT */ 1579 if (su->su_family == AF_INET) { 1580 if (ispassive) 1581 b = printf("211- PASV "); 1582 else 1583 b = printf("211- PORT "); 1584 a = (u_char *) &su->su_sin.sin_addr; 1585 p = (u_char *) &su->su_sin.sin_port; 1586 #define UC(b) (((int) b) & 0xff) 1587 b += printf("(%d,%d,%d,%d,%d,%d)\r\n", 1588 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1589 UC(p[0]), UC(p[1])); 1590 total_bytes += b; 1591 total_bytes_out += b; 1592 } 1593 1594 /* LPSV/LPRT */ 1595 { 1596 int alen, af, i; 1597 1598 alen = 0; 1599 switch (su->su_family) { 1600 case AF_INET: 1601 a = (u_char *) &su->su_sin.sin_addr; 1602 p = (u_char *) &su->su_sin.sin_port; 1603 alen = sizeof(su->su_sin.sin_addr); 1604 af = 4; 1605 break; 1606 case AF_INET6: 1607 a = (u_char *) &su->su_sin6.sin6_addr; 1608 p = (u_char *) &su->su_sin6.sin6_port; 1609 alen = sizeof(su->su_sin6.sin6_addr); 1610 af = 6; 1611 break; 1612 default: 1613 af = 0; 1614 break; 1615 } 1616 if (af) { 1617 if (ispassive) 1618 b = printf("211- LPSV "); 1619 else 1620 b = printf("211- LPRT "); 1621 printf("(%d,%d", af, alen); 1622 for (i = 0; i < alen; i++) 1623 b += printf("%d,", UC(a[alen])); 1624 b += printf("%d,%d,%d)\r\n", 2, UC(p[0]), UC(p[1])); 1625 total_bytes += b; 1626 total_bytes_out += b; 1627 #undef UC 1628 } 1629 } 1630 1631 /* EPRT/EPSV */ 1632 epsvonly:; 1633 { 1634 int af; 1635 1636 switch (su->su_family) { 1637 case AF_INET: 1638 af = 1; 1639 break; 1640 case AF_INET6: 1641 af = 2; 1642 break; 1643 default: 1644 af = 0; 1645 break; 1646 } 1647 if (af) { 1648 if (getnameinfo((struct sockaddr *)su, su->su_len, 1649 ntop_buf, sizeof(ntop_buf), NULL, 0, 1650 NI_NUMERICHOST) == 0) { 1651 if (ispassive) 1652 b = printf("211 - EPSV "); 1653 else 1654 b = printf("211 - EPRT "); 1655 b += printf("(|%d|%s|%d|)\r\n", 1656 af, ntop_buf, ntohs(su->su_port)); 1657 total_bytes += b; 1658 total_bytes_out += b; 1659 } 1660 } 1661 } 1662 } else 1663 lreply(0, "No data connection"); 1664 1665 if (logged_in) { 1666 lreply(0, "Data sent: %qd byte%s in %qd file%s", 1667 (qdfmt_t)total_data_out, PLURAL(total_data_out), 1668 (qdfmt_t)total_files_out, PLURAL(total_files_out)); 1669 lreply(0, "Data received: %qd byte%s in %qd file%s", 1670 (qdfmt_t)total_data_in, PLURAL(total_data_in), 1671 (qdfmt_t)total_files_in, PLURAL(total_files_in)); 1672 lreply(0, "Total data: %qd byte%s in %qd file%s", 1673 (qdfmt_t)total_data, PLURAL(total_data), 1674 (qdfmt_t)total_files, PLURAL(total_files)); 1675 } 1676 otbi = total_bytes_in; 1677 otbo = total_bytes_out; 1678 otb = total_bytes; 1679 lreply(0, "Traffic sent: %qd byte%s in %qd transfer%s", 1680 (qdfmt_t)otbo, PLURAL(otbo), 1681 (qdfmt_t)total_xfers_out, PLURAL(total_xfers_out)); 1682 lreply(0, "Traffic received: %qd byte%s in %qd transfer%s", 1683 (qdfmt_t)otbi, PLURAL(otbi), 1684 (qdfmt_t)total_xfers_in, PLURAL(total_xfers_in)); 1685 lreply(0, "Total traffic: %qd byte%s in %qd transfer%s", 1686 (qdfmt_t)otb, PLURAL(otb), 1687 (qdfmt_t)total_xfers, PLURAL(total_xfers)); 1688 1689 if (logged_in) { 1690 struct ftpconv *cp; 1691 1692 lreply(0, ""); 1693 lreply(0, "Class: %s", curclass.classname); 1694 lreply(0, "Check PORT/LPRT commands: %sabled", 1695 curclass.checkportcmd ? "en" : "dis"); 1696 if (curclass.display) 1697 lreply(0, "Display file: %s", curclass.display); 1698 if (curclass.notify) 1699 lreply(0, "Notify fileglob: %s", curclass.notify); 1700 lreply(0, "Idle timeout: %d, maximum timeout: %d", 1701 curclass.timeout, curclass.maxtimeout); 1702 lreply(0, "DELE, MKD, RMD, UMASK, CHMOD commands: %sabled", 1703 curclass.modify ? "en" : "dis"); 1704 lreply(0, "Umask: %.04o", curclass.umask); 1705 for (cp = curclass.conversions; cp != NULL; cp=cp->next) { 1706 if (cp->suffix == NULL || cp->types == NULL || 1707 cp->command == NULL) 1708 continue; 1709 lreply(0, 1710 "Conversion: %s [%s] disable: %s, command: %s", 1711 cp->suffix, cp->types, cp->disable, cp->command); 1712 } 1713 } 1714 1715 reply(211, "End of status"); 1716 } 1717 1718 void 1719 fatal(s) 1720 const char *s; 1721 { 1722 1723 reply(451, "Error in server: %s\n", s); 1724 reply(221, "Closing connection due to server error."); 1725 dologout(0); 1726 /* NOTREACHED */ 1727 } 1728 1729 void 1730 #ifdef __STDC__ 1731 reply(int n, const char *fmt, ...) 1732 #else 1733 reply(n, fmt, va_alist) 1734 int n; 1735 char *fmt; 1736 va_dcl 1737 #endif 1738 { 1739 off_t b; 1740 va_list ap; 1741 #ifdef __STDC__ 1742 va_start(ap, fmt); 1743 #else 1744 va_start(ap); 1745 #endif 1746 b = 0; 1747 b += printf("%d ", n); 1748 b += vprintf(fmt, ap); 1749 b += printf("\r\n"); 1750 total_bytes += b; 1751 total_bytes_out += b; 1752 (void)fflush(stdout); 1753 if (debug) { 1754 syslog(LOG_DEBUG, "<--- %d ", n); 1755 vsyslog(LOG_DEBUG, fmt, ap); 1756 } 1757 } 1758 1759 void 1760 #ifdef __STDC__ 1761 lreply(int n, const char *fmt, ...) 1762 #else 1763 lreply(n, fmt, va_alist) 1764 int n; 1765 char *fmt; 1766 va_dcl 1767 #endif 1768 { 1769 off_t b; 1770 va_list ap; 1771 #ifdef __STDC__ 1772 va_start(ap, fmt); 1773 #else 1774 va_start(ap); 1775 #endif 1776 b = 0; 1777 switch (n) { 1778 case 0: 1779 b += printf(" "); 1780 case -1: 1781 break; 1782 default: 1783 b += printf("%d-", n); 1784 break; 1785 } 1786 b += vprintf(fmt, ap); 1787 b += printf("\r\n"); 1788 total_bytes += b; 1789 total_bytes_out += b; 1790 (void)fflush(stdout); 1791 if (debug) { 1792 syslog(LOG_DEBUG, "<--- %d- ", n); 1793 vsyslog(LOG_DEBUG, fmt, ap); 1794 } 1795 } 1796 1797 static void 1798 ack(s) 1799 const char *s; 1800 { 1801 1802 reply(250, "%s command successful.", s); 1803 } 1804 1805 void 1806 delete(name) 1807 const char *name; 1808 { 1809 char *p = NULL; 1810 1811 if (remove(name) < 0) { 1812 p = strerror(errno); 1813 perror_reply(550, name); 1814 } else 1815 ack("DELE"); 1816 logcmd("delete", -1, name, NULL, NULL, p); 1817 } 1818 1819 void 1820 cwd(path) 1821 const char *path; 1822 { 1823 1824 if (chdir(path) < 0) 1825 perror_reply(550, path); 1826 else { 1827 show_chdir_messages(250); 1828 ack("CWD"); 1829 } 1830 } 1831 1832 static void 1833 replydirname(name, message) 1834 const char *name, *message; 1835 { 1836 char npath[MAXPATHLEN + 1]; 1837 int i; 1838 1839 for (i = 0; *name != '\0' && i < sizeof(npath) - 1; i++, name++) { 1840 npath[i] = *name; 1841 if (*name == '"') 1842 npath[++i] = '"'; 1843 } 1844 npath[i] = '\0'; 1845 reply(257, "\"%s\" %s", npath, message); 1846 } 1847 1848 void 1849 makedir(name) 1850 const char *name; 1851 { 1852 char *p = NULL; 1853 1854 if (mkdir(name, 0777) < 0) { 1855 p = strerror(errno); 1856 perror_reply(550, name); 1857 } else 1858 replydirname(name, "directory created."); 1859 logcmd("mkdir", -1, name, NULL, NULL, p); 1860 } 1861 1862 void 1863 removedir(name) 1864 const char *name; 1865 { 1866 char *p = NULL; 1867 1868 if (rmdir(name) < 0) { 1869 p = strerror(errno); 1870 perror_reply(550, name); 1871 } else 1872 ack("RMD"); 1873 logcmd("rmdir", -1, name, NULL, NULL, p); 1874 } 1875 1876 void 1877 pwd() 1878 { 1879 char path[MAXPATHLEN + 1]; 1880 1881 if (getcwd(path, sizeof(path) - 1) == NULL) 1882 reply(550, "Can't get the current directory: %s.", 1883 strerror(errno)); 1884 else 1885 replydirname(path, "is the current directory."); 1886 } 1887 1888 char * 1889 renamefrom(name) 1890 char *name; 1891 { 1892 struct stat st; 1893 1894 if (stat(name, &st) < 0) { 1895 perror_reply(550, name); 1896 return (NULL); 1897 } 1898 reply(350, "File exists, ready for destination name"); 1899 return (name); 1900 } 1901 1902 void 1903 renamecmd(from, to) 1904 const char *from, *to; 1905 { 1906 char *p = NULL; 1907 1908 if (rename(from, to) < 0) { 1909 p = strerror(errno); 1910 perror_reply(550, "rename"); 1911 } else 1912 ack("RNTO"); 1913 logcmd("rename", -1, from, to, NULL, p); 1914 } 1915 1916 static void 1917 dolog(who) 1918 struct sockaddr *who; 1919 { 1920 int error; 1921 error = getnameinfo(who, who->sa_len, remotehost, sizeof(remotehost), 1922 NULL, 0, 0); 1923 #ifdef HASSETPROCTITLE 1924 snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost); 1925 setproctitle(proctitle); 1926 #endif /* HASSETPROCTITLE */ 1927 1928 if (logging) 1929 syslog(LOG_INFO, "connection from %s", remotehost); 1930 } 1931 1932 /* 1933 * Record logout in wtmp file 1934 * and exit with supplied status. 1935 */ 1936 void 1937 dologout(status) 1938 int status; 1939 { 1940 /* 1941 * Prevent reception of SIGURG from resulting in a resumption 1942 * back to the main program loop. 1943 */ 1944 transflag = 0; 1945 1946 if (logged_in) { 1947 (void) seteuid((uid_t)0); 1948 logwtmp(ttyline, "", ""); 1949 #ifdef KERBEROS 1950 if (!notickets && krbtkfile_env) 1951 unlink(krbtkfile_env); 1952 #endif 1953 } 1954 /* beware of flushing buffers after a SIGPIPE */ 1955 _exit(status); 1956 } 1957 1958 static void 1959 myoob(signo) 1960 int signo; 1961 { 1962 char *cp; 1963 1964 /* only process if transfer occurring */ 1965 if (!transflag) 1966 return; 1967 cp = tmpline; 1968 if (getline(cp, 7, stdin) == NULL) { 1969 reply(221, "You could at least say goodbye."); 1970 dologout(0); 1971 } 1972 if (strcasecmp(cp, "ABOR\r\n") == 0) { 1973 tmpline[0] = '\0'; 1974 reply(426, "Transfer aborted. Data connection closed."); 1975 reply(226, "Abort successful"); 1976 longjmp(urgcatch, 1); 1977 } 1978 if (strcasecmp(cp, "STAT\r\n") == 0) { 1979 if (file_size != (off_t) -1) 1980 reply(213, "Status: %qd of %qd byte%s transferred", 1981 (qdfmt_t)byte_count, (qdfmt_t)file_size, 1982 PLURAL(byte_count)); 1983 else 1984 reply(213, "Status: %qd byte%s transferred", 1985 (qdfmt_t)byte_count, PLURAL(byte_count)); 1986 } 1987 } 1988 1989 /* 1990 * Note: a response of 425 is not mentioned as a possible response to 1991 * the PASV command in RFC959. However, it has been blessed as 1992 * a legitimate response by Jon Postel in a telephone conversation 1993 * with Rick Adams on 25 Jan 89. 1994 */ 1995 void 1996 passive() 1997 { 1998 int len; 1999 char *p, *a; 2000 2001 pdata = socket(AF_INET, SOCK_STREAM, 0); 2002 if (pdata < 0 || !logged_in) { 2003 perror_reply(425, "Can't open passive connection"); 2004 return; 2005 } 2006 pasv_addr = ctrl_addr; 2007 pasv_addr.su_port = 0; 2008 len = pasv_addr.su_len; 2009 (void) seteuid((uid_t)0); 2010 if (bind(pdata, (struct sockaddr *)&pasv_addr, len) < 0) { 2011 (void) seteuid((uid_t)pw->pw_uid); 2012 goto pasv_error; 2013 } 2014 (void) seteuid((uid_t)pw->pw_uid); 2015 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2016 goto pasv_error; 2017 if (listen(pdata, 1) < 0) 2018 goto pasv_error; 2019 a = (char *) &pasv_addr.su_sin.sin_addr; 2020 p = (char *) &pasv_addr.su_port; 2021 2022 #define UC(b) (((int) b) & 0xff) 2023 2024 reply(227, "Entering Passive Mode (%d,%d,%d,%d,%d,%d)", UC(a[0]), 2025 UC(a[1]), UC(a[2]), UC(a[3]), UC(p[0]), UC(p[1])); 2026 return; 2027 2028 pasv_error: 2029 (void) seteuid((uid_t)pw->pw_uid); 2030 (void) close(pdata); 2031 pdata = -1; 2032 perror_reply(425, "Can't open passive connection"); 2033 return; 2034 } 2035 2036 /* 2037 * 228 Entering Long Passive Mode (af, hal, h1, h2, h3,..., pal, p1, p2...) 2038 * 229 Entering Extended Passive Mode (|||port|) 2039 */ 2040 void 2041 long_passive(char *cmd, int pf) 2042 { 2043 int len; 2044 register char *p, *a; 2045 2046 if (!logged_in) { 2047 syslog(LOG_NOTICE, "long passive but not logged in"); 2048 reply(503, "Login with USER first."); 2049 return; 2050 } 2051 2052 if (pf != PF_UNSPEC) { 2053 if (ctrl_addr.su_family != pf) { 2054 switch (ctrl_addr.su_family) { 2055 case AF_INET: 2056 pf = 1; 2057 break; 2058 case AF_INET6: 2059 pf = 2; 2060 break; 2061 default: 2062 pf = 0; 2063 break; 2064 } 2065 /* 2066 * XXX 2067 * only EPRT/EPSV ready clients will understand this 2068 */ 2069 if (strcmp(cmd, "EPSV") == 0 && pf) { 2070 reply(522, "Network protocol mismatch, " 2071 "use (%d)", pf); 2072 } else 2073 reply(501, "Network protocol mismatch"); /*XXX*/ 2074 2075 return; 2076 } 2077 } 2078 2079 pdata = socket(ctrl_addr.su_family, SOCK_STREAM, 0); 2080 if (pdata < 0) { 2081 perror_reply(425, "Can't open passive connection"); 2082 return; 2083 } 2084 pasv_addr = ctrl_addr; 2085 pasv_addr.su_port = 0; 2086 (void) seteuid((uid_t) 0); 2087 if (bind(pdata, (struct sockaddr *) &pasv_addr, pasv_addr.su_len) < 0) { 2088 (void) seteuid((uid_t) pw->pw_uid); 2089 goto pasv_error; 2090 } 2091 (void) seteuid((uid_t) pw->pw_uid); 2092 len = pasv_addr.su_len; 2093 if (getsockname(pdata, (struct sockaddr *) &pasv_addr, &len) < 0) 2094 goto pasv_error; 2095 if (listen(pdata, 1) < 0) 2096 goto pasv_error; 2097 p = (char *) &pasv_addr.su_port; 2098 2099 #define UC(b) (((int) b) & 0xff) 2100 2101 if (strcmp(cmd, "LPSV") == 0) { 2102 switch (pasv_addr.su_family) { 2103 case AF_INET: 2104 a = (char *) &pasv_addr.su_sin.sin_addr; 2105 reply(228, "Entering Long Passive Mode (%d,%d,%d,%d,%d,%d,%d,%d,%d)", 2106 4, 4, UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2107 2, UC(p[0]), UC(p[1])); 2108 return; 2109 case AF_INET6: 2110 a = (char *) &pasv_addr.su_sin6.sin6_addr; 2111 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)", 2112 6, 16, 2113 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 2114 UC(a[4]), UC(a[5]), UC(a[6]), UC(a[7]), 2115 UC(a[8]), UC(a[9]), UC(a[10]), UC(a[11]), 2116 UC(a[12]), UC(a[13]), UC(a[14]), UC(a[15]), 2117 2, UC(p[0]), UC(p[1])); 2118 return; 2119 } 2120 #undef UC 2121 } else if (strcmp(cmd, "EPSV") == 0) { 2122 switch (pasv_addr.su_family) { 2123 case AF_INET: 2124 case AF_INET6: 2125 reply(229, "Entering Extended Passive Mode (|||%d|)", 2126 ntohs(pasv_addr.su_port)); 2127 return; 2128 } 2129 } else { 2130 /* more proper error code? */ 2131 } 2132 2133 pasv_error: 2134 (void) close(pdata); 2135 pdata = -1; 2136 perror_reply(425, "Can't open passive connection"); 2137 return; 2138 } 2139 2140 /* 2141 * Generate unique name for file with basename "local". 2142 * The file named "local" is already known to exist. 2143 * Generates failure reply on error. 2144 * 2145 * XXX this function should under go changes similar to 2146 * the mktemp(3)/mkstemp(3) changes. 2147 */ 2148 static char * 2149 gunique(local) 2150 const char *local; 2151 { 2152 static char new[MAXPATHLEN + 1]; 2153 struct stat st; 2154 int count, len; 2155 char *cp; 2156 2157 cp = strrchr(local, '/'); 2158 if (cp) 2159 *cp = '\0'; 2160 if (stat(cp ? local : ".", &st) < 0) { 2161 perror_reply(553, cp ? local : "."); 2162 return (NULL); 2163 } 2164 if (cp) 2165 *cp = '/'; 2166 (void) strcpy(new, local); 2167 len = strlen(new); 2168 cp = new + len; 2169 *cp++ = '.'; 2170 for (count = 1; count < 100; count++) { 2171 (void)snprintf(cp, sizeof(new) - len - 2, "%d", count); 2172 if (stat(new, &st) < 0) 2173 return (new); 2174 } 2175 reply(452, "Unique file name cannot be created."); 2176 return (NULL); 2177 } 2178 2179 /* 2180 * Format and send reply containing system error number. 2181 */ 2182 void 2183 perror_reply(code, string) 2184 int code; 2185 const char *string; 2186 { 2187 int save_errno; 2188 2189 save_errno = errno; 2190 reply(code, "%s: %s.", string, strerror(errno)); 2191 errno = save_errno; 2192 } 2193 2194 static char *onefile[] = { 2195 "", 2196 0 2197 }; 2198 2199 void 2200 send_file_list(whichf) 2201 const char *whichf; 2202 { 2203 struct stat st; 2204 DIR *dirp = NULL; 2205 struct dirent *dir; 2206 FILE *dout = NULL; 2207 char **dirlist, *dirname, *p; 2208 int simple = 0; 2209 int freeglob = 0; 2210 glob_t gl; 2211 off_t b; 2212 2213 #ifdef __GNUC__ 2214 (void) &dout; 2215 (void) &dirlist; 2216 (void) &simple; 2217 (void) &freeglob; 2218 #endif 2219 2220 p = NULL; 2221 if (strpbrk(whichf, "~{[*?") != NULL) { 2222 int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 2223 2224 memset(&gl, 0, sizeof(gl)); 2225 freeglob = 1; 2226 if (glob(whichf, flags, 0, &gl)) { 2227 reply(550, "not found"); 2228 goto out; 2229 } else if (gl.gl_pathc == 0) { 2230 errno = ENOENT; 2231 perror_reply(550, whichf); 2232 goto out; 2233 } 2234 dirlist = gl.gl_pathv; 2235 } else { 2236 p = xstrdup(whichf); 2237 onefile[0] = p; 2238 dirlist = onefile; 2239 simple = 1; 2240 } 2241 /* XXX: } for vi sm */ 2242 2243 if (setjmp(urgcatch)) { 2244 transflag = 0; 2245 goto out; 2246 } 2247 while ((dirname = *dirlist++) != NULL) { 2248 int trailingslash = 0; 2249 2250 if (stat(dirname, &st) < 0) { 2251 /* 2252 * If user typed "ls -l", etc, and the client 2253 * used NLST, do what the user meant. 2254 */ 2255 if (dirname[0] == '-' && *dirlist == NULL && 2256 transflag == 0) { 2257 retrieve("/bin/ls %s", dirname); 2258 goto out; 2259 } 2260 perror_reply(550, whichf); 2261 if (dout != NULL) { 2262 (void) fclose(dout); 2263 transflag = 0; 2264 data = -1; 2265 pdata = -1; 2266 } 2267 goto out; 2268 } 2269 2270 if (S_ISREG(st.st_mode)) { 2271 if (dout == NULL) { 2272 dout = dataconn("file list", (off_t)-1, "w"); 2273 if (dout == NULL) 2274 goto out; 2275 transflag++; 2276 } 2277 b = fprintf(dout, "%s%s\n", dirname, 2278 type == TYPE_A ? "\r" : ""); 2279 total_bytes += b; 2280 total_bytes_out += b; 2281 byte_count += strlen(dirname) + 1; 2282 continue; 2283 } else if (!S_ISDIR(st.st_mode)) 2284 continue; 2285 2286 if (dirname[strlen(dirname) - 1] == '/') 2287 trailingslash++; 2288 2289 if ((dirp = opendir(dirname)) == NULL) 2290 continue; 2291 2292 while ((dir = readdir(dirp)) != NULL) { 2293 char nbuf[MAXPATHLEN + 1]; 2294 2295 if (dir->d_name[0] == '.' && dir->d_namlen == 1) 2296 continue; 2297 if (dir->d_name[0] == '.' && dir->d_name[1] == '.' && 2298 dir->d_namlen == 2) 2299 continue; 2300 2301 (void)snprintf(nbuf, sizeof(nbuf), "%s%s%s", dirname, 2302 trailingslash ? "" : "/", dir->d_name); 2303 2304 /* 2305 * We have to do a stat to ensure it's 2306 * not a directory or special file. 2307 */ 2308 if (simple || (stat(nbuf, &st) == 0 && 2309 S_ISREG(st.st_mode))) { 2310 char *p; 2311 2312 if (dout == NULL) { 2313 dout = dataconn("file list", (off_t)-1, 2314 "w"); 2315 if (dout == NULL) 2316 goto out; 2317 transflag++; 2318 } 2319 p = nbuf; 2320 if (nbuf[0] == '.' && nbuf[1] == '/') 2321 p = &nbuf[2]; 2322 b = fprintf(dout, "%s%s\n", p, 2323 type == TYPE_A ? "\r" : ""); 2324 total_bytes += b; 2325 total_bytes_out += b; 2326 byte_count += strlen(nbuf) + 1; 2327 } 2328 } 2329 (void) closedir(dirp); 2330 } 2331 2332 if (dout == NULL) 2333 reply(550, "No files found."); 2334 else if (ferror(dout) != 0) 2335 perror_reply(550, "Data connection"); 2336 else 2337 reply(226, "Transfer complete."); 2338 2339 transflag = 0; 2340 if (dout != NULL) 2341 (void) fclose(dout); 2342 data = -1; 2343 pdata = -1; 2344 out: 2345 total_xfers++; 2346 total_xfers_out++; 2347 if (p) 2348 free(p); 2349 if (freeglob) 2350 globfree(&gl); 2351 } 2352 2353 char * 2354 conffilename(s) 2355 const char *s; 2356 { 2357 static char filename[MAXPATHLEN + 1]; 2358 2359 (void)snprintf(filename, sizeof(filename), "%s/%s", confdir ,s); 2360 return filename; 2361 } 2362 2363 /* 2364 * logcmd -- 2365 * based on the arguments, syslog a message: 2366 * if bytes != -1 "<command> <file1> = <bytes> bytes" 2367 * else if file2 != NULL "<command> <file1> <file2>" 2368 * else "<command> <file1>" 2369 * if elapsed != NULL, append "in xxx.yyy seconds" 2370 * if error != NULL, append ": " + error 2371 */ 2372 2373 void 2374 logcmd(command, bytes, file1, file2, elapsed, error) 2375 const char *command; 2376 off_t bytes; 2377 const char *file1; 2378 const char *file2; 2379 const struct timeval *elapsed; 2380 const char *error; 2381 { 2382 char buf[MAXPATHLEN + 100], realfile[MAXPATHLEN + 1]; 2383 const char *p; 2384 size_t len; 2385 2386 if (logging <=1) 2387 return; 2388 2389 if ((p = realpath(file1, realfile)) == NULL) { 2390 #if 0 /* XXX: too noisy */ 2391 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2392 realfile, strerror(errno)); 2393 #endif 2394 p = file1; 2395 } 2396 len = snprintf(buf, sizeof(buf), "%s %s", command, p); 2397 2398 if (bytes != (off_t)-1) { 2399 len += snprintf(buf + len, sizeof(buf) - len, 2400 " = %qd byte%s", (qdfmt_t) bytes, PLURAL(bytes)); 2401 } else if (file2 != NULL) { 2402 if ((p = realpath(file2, realfile)) == NULL) { 2403 #if 0 /* XXX: too noisy */ 2404 syslog(LOG_WARNING, "realpath `%s' failed: %s", 2405 realfile, strerror(errno)); 2406 #endif 2407 p = file2; 2408 } 2409 len += snprintf(buf + len, sizeof(buf) - len, " %s", p); 2410 } 2411 2412 if (elapsed != NULL) { 2413 len += snprintf(buf + len, sizeof(buf) - len, 2414 " in %ld.%.03d seconds", elapsed->tv_sec, 2415 (int)(elapsed->tv_usec / 1000)); 2416 } 2417 2418 if (error != NULL) 2419 len += snprintf(buf + len, sizeof(buf) - len, ": %s", error); 2420 2421 syslog(LOG_INFO, "%s", buf); 2422 } 2423 2424 char * 2425 xstrdup(s) 2426 const char *s; 2427 { 2428 char *new = strdup(s); 2429 2430 if (new == NULL) 2431 fatal("Local resource failure: malloc"); 2432 /* NOTREACHED */ 2433 return (new); 2434 } 2435
Indexes created Sat Sep 27 14:09:57 GMT 2025