1 /* 2 * Copyright (c) 1997-2000 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "push_locl.h" 35 RCSID("$Id: push.c,v 1.44 2001/02/20 01:44:47 assar Exp $"); 36 37 #ifdef KRB4 38 static int use_v4 = -1; 39 #endif 40 41 #ifdef KRB5 42 static int use_v5 = -1; 43 static krb5_context context; 44 #endif 45 46 static char *port_str; 47 static int verbose_level; 48 static int do_fork; 49 static int do_leave; 50 static int do_version; 51 static int do_help; 52 static int do_from; 53 static int do_count; 54 static char *header_str; 55 56 struct getargs args[] = { 57 #ifdef KRB4 58 { "krb4", '4', arg_flag, &use_v4, "Use Kerberos V4", 59 NULL }, 60 #endif 61 #ifdef KRB5 62 { "krb5", '5', arg_flag, &use_v5, "Use Kerberos V5", 63 NULL }, 64 #endif 65 { "verbose",'v', arg_counter, &verbose_level, "Verbose", 66 NULL }, 67 { "fork", 'f', arg_flag, &do_fork, "Fork deleting proc", 68 NULL }, 69 { "leave", 'l', arg_flag, &do_leave, "Leave mail on server", 70 NULL }, 71 { "port", 'p', arg_string, &port_str, "Use this port", 72 "number-or-service" }, 73 { "from", 0, arg_flag, &do_from, "Behave like from", 74 NULL }, 75 { "headers", 0, arg_string, &header_str, "Headers to print", NULL }, 76 { "count", 'c', arg_flag, &do_count, "Print number of messages", NULL}, 77 { "version", 0, arg_flag, &do_version, "Print version", 78 NULL }, 79 { "help", 0, arg_flag, &do_help, NULL, 80 NULL } 81 82 }; 83 84 static void 85 usage (int ret) 86 { 87 arg_printusage (args, 88 sizeof(args) / sizeof(args[0]), 89 NULL, 90 "[[{po:username[@hostname] | hostname[:username]}] ...] " 91 "filename"); 92 exit (ret); 93 } 94 95 static int 96 do_connect (const char *hostname, int port, int nodelay) 97 { 98 struct addrinfo *ai, *a; 99 struct addrinfo hints; 100 int error; 101 int s = -1; 102 char portstr[NI_MAXSERV]; 103 104 memset (&hints, 0, sizeof(hints)); 105 hints.ai_socktype = SOCK_STREAM; 106 hints.ai_protocol = IPPROTO_TCP; 107 108 snprintf (portstr, sizeof(portstr), "%u", ntohs(port)); 109 110 error = getaddrinfo (hostname, portstr, &hints, &ai); 111 if (error) 112 errx (1, "getaddrinfo(%s): %s", hostname, gai_strerror(error)); 113 114 for (a = ai; a != NULL; a = a->ai_next) { 115 s = socket (a->ai_family, a->ai_socktype, a->ai_protocol); 116 if (s < 0) 117 continue; 118 if (connect (s, a->ai_addr, a->ai_addrlen) < 0) { 119 warn ("connect(%s)", hostname); 120 close (s); 121 continue; 122 } 123 break; 124 } 125 freeaddrinfo (ai); 126 if (a == NULL) { 127 warnx ("failed to contact %s", hostname); 128 return -1; 129 } 130 131 if(setsockopt(s, IPPROTO_TCP, TCP_NODELAY, 132 (void *)&nodelay, sizeof(nodelay)) < 0) 133 err (1, "setsockopt TCP_NODELAY"); 134 return s; 135 } 136 137 typedef enum { INIT = 0, GREET, USER, PASS, STAT, RETR, TOP, 138 DELE, XDELE, QUIT} pop_state; 139 140 #define PUSH_BUFSIZ 65536 141 142 #define STEP 16 143 144 struct write_state { 145 struct iovec *iovecs; 146 size_t niovecs, maxiovecs, allociovecs; 147 int fd; 148 }; 149 150 static void 151 write_state_init (struct write_state *w, int fd) 152 { 153 #ifdef UIO_MAXIOV 154 w->maxiovecs = UIO_MAXIOV; 155 #else 156 w->maxiovecs = 16; 157 #endif 158 w->allociovecs = min(STEP, w->maxiovecs); 159 w->niovecs = 0; 160 w->iovecs = emalloc(w->allociovecs * sizeof(*w->iovecs)); 161 w->fd = fd; 162 } 163 164 static void 165 write_state_add (struct write_state *w, void *v, size_t len) 166 { 167 if(w->niovecs == w->allociovecs) { 168 if(w->niovecs == w->maxiovecs) { 169 if(writev (w->fd, w->iovecs, w->niovecs) < 0) 170 err(1, "writev"); 171 w->niovecs = 0; 172 } else { 173 w->allociovecs = min(w->allociovecs + STEP, w->maxiovecs); 174 w->iovecs = erealloc (w->iovecs, 175 w->allociovecs * sizeof(*w->iovecs)); 176 } 177 } 178 w->iovecs[w->niovecs].iov_base = v; 179 w->iovecs[w->niovecs].iov_len = len; 180 ++w->niovecs; 181 } 182 183 static void 184 write_state_flush (struct write_state *w) 185 { 186 if (w->niovecs) { 187 if (writev (w->fd, w->iovecs, w->niovecs) < 0) 188 err (1, "writev"); 189 w->niovecs = 0; 190 } 191 } 192 193 static void 194 write_state_destroy (struct write_state *w) 195 { 196 free (w->iovecs); 197 } 198 199 static int 200 doit(int s, 201 const char *host, 202 const char *user, 203 const char *outfilename, 204 const char *header_str, 205 int leavep, 206 int verbose, 207 int forkp) 208 { 209 int ret; 210 char out_buf[PUSH_BUFSIZ]; 211 size_t out_len = 0; 212 char in_buf[PUSH_BUFSIZ + 1]; /* sentinel */ 213 size_t in_len = 0; 214 char *in_ptr = in_buf; 215 pop_state state = INIT; 216 unsigned count, bytes; 217 unsigned asked_for = 0, retrieved = 0, asked_deleted = 0, deleted = 0; 218 unsigned sent_xdele = 0; 219 int out_fd; 220 char from_line[128]; 221 size_t from_line_length; 222 time_t now; 223 struct write_state write_state; 224 int numheaders = 1; 225 char **headers = NULL; 226 int i; 227 char *tmp = NULL; 228 229 if (do_from) { 230 char *tmp2; 231 232 tmp2 = tmp = estrdup(header_str); 233 234 out_fd = -1; 235 if (verbose) 236 fprintf (stderr, "%s@%s\n", user, host); 237 while (*tmp != '\0') { 238 tmp = strchr(tmp, ','); 239 if (tmp == NULL) 240 break; 241 tmp++; 242 numheaders++; 243 } 244 245 headers = emalloc(sizeof(char *) * (numheaders + 1)); 246 for (i = 0; i < numheaders; i++) { 247 headers[i] = strtok_r(tmp2, ",", &tmp2); 248 } 249 headers[numheaders] = NULL; 250 } else { 251 out_fd = open(outfilename, O_WRONLY | O_APPEND | O_CREAT, 0666); 252 if (out_fd < 0) 253 err (1, "open %s", outfilename); 254 if (verbose) 255 fprintf (stderr, "%s@%s -> %s\n", user, host, outfilename); 256 } 257 258 now = time(NULL); 259 from_line_length = snprintf (from_line, sizeof(from_line), 260 "From %s %s", "push", ctime(&now)); 261 262 out_len = snprintf (out_buf, sizeof(out_buf), 263 "USER %s\r\nPASS hej\r\nSTAT\r\n", 264 user); 265 if (net_write (s, out_buf, out_len) != out_len) 266 err (1, "write"); 267 if (verbose > 1) 268 write (STDERR_FILENO, out_buf, out_len); 269 270 if (!do_from) 271 write_state_init (&write_state, out_fd); 272 273 while(state != QUIT) { 274 fd_set readset, writeset; 275 276 FD_ZERO(&readset); 277 FD_ZERO(&writeset); 278 if (s >= FD_SETSIZE) 279 errx (1, "fd too large"); 280 FD_SET(s,&readset); 281 if (((state == STAT || state == RETR || state == TOP) 282 && asked_for < count) 283 || (state == XDELE && !sent_xdele) 284 || (state == DELE && asked_deleted < count)) 285 FD_SET(s,&writeset); 286 ret = select (s + 1, &readset, &writeset, NULL, NULL); 287 if (ret < 0) { 288 if (errno == EAGAIN) 289 continue; 290 else 291 err (1, "select"); 292 } 293 294 if (FD_ISSET(s, &readset)) { 295 char *beg, *p; 296 size_t rem; 297 int blank_line = 0; 298 299 ret = read (s, in_ptr, sizeof(in_buf) - in_len - 1); 300 if (ret < 0) 301 err (1, "read"); 302 else if (ret == 0) 303 errx (1, "EOF during read"); 304 305 in_len += ret; 306 in_ptr += ret; 307 *in_ptr = '\0'; 308 309 beg = in_buf; 310 rem = in_len; 311 while(rem > 1 312 && (p = strstr(beg, "\r\n")) != NULL) { 313 if (state == TOP) { 314 char *copy = beg; 315 316 for (i = 0; i < numheaders; i++) { 317 size_t len; 318 319 len = min(p - copy + 1, strlen(headers[i])); 320 if (strncasecmp(copy, headers[i], len) == 0) { 321 fprintf (stdout, "%.*s\n", (int)(p - copy), copy); 322 } 323 } 324 if (beg[0] == '.' && beg[1] == '\r' && beg[2] == '\n') { 325 if (numheaders > 1) 326 fprintf (stdout, "\n"); 327 state = STAT; 328 if (++retrieved == count) { 329 state = QUIT; 330 net_write (s, "QUIT\r\n", 6); 331 if (verbose > 1) 332 net_write (STDERR_FILENO, "QUIT\r\n", 6); 333 } 334 } 335 rem -= p - beg + 2; 336 beg = p + 2; 337 } else if (state == RETR) { 338 char *copy = beg; 339 if (beg[0] == '.') { 340 if (beg[1] == '\r' && beg[2] == '\n') { 341 if(!blank_line) 342 write_state_add(&write_state, "\n", 1); 343 state = STAT; 344 rem -= p - beg + 2; 345 beg = p + 2; 346 if (++retrieved == count) { 347 write_state_flush (&write_state); 348 if (fsync (out_fd) < 0) 349 err (1, "fsync"); 350 close(out_fd); 351 if (leavep) { 352 state = QUIT; 353 net_write (s, "QUIT\r\n", 6); 354 if (verbose > 1) 355 net_write (STDERR_FILENO, "QUIT\r\n", 6); 356 } else { 357 if (forkp) { 358 pid_t pid; 359 360 pid = fork(); 361 if (pid < 0) 362 warn ("fork"); 363 else if(pid != 0) { 364 if(verbose) 365 fprintf (stderr, 366 "(exiting)"); 367 return 0; 368 } 369 } 370 371 state = XDELE; 372 if (verbose) 373 fprintf (stderr, "deleting... "); 374 } 375 } 376 continue; 377 } else 378 ++copy; 379 } 380 *p = '\n'; 381 if(blank_line && 382 strncmp(copy, "From ", min(p - copy + 1, 5)) == 0) 383 write_state_add(&write_state, ">", 1); 384 write_state_add(&write_state, copy, p - copy + 1); 385 blank_line = (*copy == '\n'); 386 rem -= p - beg + 2; 387 beg = p + 2; 388 } else if (rem >= 3 && strncmp (beg, "+OK", 3) == 0) { 389 if (state == STAT) { 390 if (!do_from) 391 write_state_add(&write_state, 392 from_line, from_line_length); 393 blank_line = 0; 394 if (do_from) 395 state = TOP; 396 else 397 state = RETR; 398 } else if (state == XDELE) { 399 state = QUIT; 400 net_write (s, "QUIT\r\n", 6); 401 if (verbose > 1) 402 net_write (STDERR_FILENO, "QUIT\r\n", 6); 403 break; 404 } else if (state == DELE) { 405 if (++deleted == count) { 406 state = QUIT; 407 net_write (s, "QUIT\r\n", 6); 408 if (verbose > 1) 409 net_write (STDERR_FILENO, "QUIT\r\n", 6); 410 break; 411 } 412 } else if (++state == STAT) { 413 if(sscanf (beg + 4, "%u %u", &count, &bytes) != 2) 414 errx(1, "Bad STAT-line: %.*s", (int)(p - beg), beg); 415 if (verbose) { 416 fprintf (stderr, "%u message(s) (%u bytes). " 417 "fetching... ", 418 count, bytes); 419 if (do_from) 420 fprintf (stderr, "\n"); 421 } else if (do_count) { 422 fprintf (stderr, "%u message(s) (%u bytes).\n", 423 count, bytes); 424 } 425 if (count == 0) { 426 state = QUIT; 427 net_write (s, "QUIT\r\n", 6); 428 if (verbose > 1) 429 net_write (STDERR_FILENO, "QUIT\r\n", 6); 430 break; 431 } 432 } 433 434 rem -= p - beg + 2; 435 beg = p + 2; 436 } else { 437 if(state == XDELE) { 438 state = DELE; 439 rem -= p - beg + 2; 440 beg = p + 2; 441 } else 442 errx (1, "Bad response: %.*s", (int)(p - beg), beg); 443 } 444 } 445 if (!do_from) 446 write_state_flush (&write_state); 447 448 memmove (in_buf, beg, rem); 449 in_len = rem; 450 in_ptr = in_buf + rem; 451 } 452 if (FD_ISSET(s, &writeset)) { 453 if ((state == STAT && !do_from) || state == RETR) 454 out_len = snprintf (out_buf, sizeof(out_buf), 455 "RETR %u\r\n", ++asked_for); 456 else if ((state == STAT && do_from) || state == TOP) 457 out_len = snprintf (out_buf, sizeof(out_buf), 458 "TOP %u 0\r\n", ++asked_for); 459 else if(state == XDELE) { 460 out_len = snprintf(out_buf, sizeof(out_buf), 461 "XDELE %u %u\r\n", 1, count); 462 sent_xdele++; 463 } 464 else if(state == DELE) 465 out_len = snprintf (out_buf, sizeof(out_buf), 466 "DELE %u\r\n", ++asked_deleted); 467 if (net_write (s, out_buf, out_len) != out_len) 468 err (1, "write"); 469 if (verbose > 1) 470 write (STDERR_FILENO, out_buf, out_len); 471 } 472 } 473 if (verbose) 474 fprintf (stderr, "Done\n"); 475 if (do_from) { 476 free (tmp); 477 free (headers); 478 } else { 479 write_state_destroy (&write_state); 480 } 481 return 0; 482 } 483 484 #ifdef KRB5 485 static int 486 do_v5 (const char *host, 487 int port, 488 const char *user, 489 const char *filename, 490 const char *header_str, 491 int leavep, 492 int verbose, 493 int forkp) 494 { 495 krb5_error_code ret; 496 krb5_auth_context auth_context = NULL; 497 krb5_principal server; 498 int s; 499 500 s = do_connect (host, port, 1); 501 if (s < 0) 502 return 1; 503 504 ret = krb5_sname_to_principal (context, 505 host, 506 "pop", 507 KRB5_NT_SRV_HST, 508 &server); 509 if (ret) { 510 warnx ("krb5_sname_to_principal: %s", 511 krb5_get_err_text (context, ret)); 512 return 1; 513 } 514 515 ret = krb5_sendauth (context, 516 &auth_context, 517 &s, 518 "KPOPV1.0", 519 NULL, 520 server, 521 0, 522 NULL, 523 NULL, 524 NULL, 525 NULL, 526 NULL, 527 NULL); 528 krb5_free_principal (context, server); 529 if (ret) { 530 warnx ("krb5_sendauth: %s", 531 krb5_get_err_text (context, ret)); 532 return 1; 533 } 534 return doit (s, host, user, filename, header_str, leavep, verbose, forkp); 535 } 536 #endif 537 538 #ifdef KRB4 539 static int 540 do_v4 (const char *host, 541 int port, 542 const char *user, 543 const char *filename, 544 const char *header_str, 545 int leavep, 546 int verbose, 547 int forkp) 548 { 549 KTEXT_ST ticket; 550 MSG_DAT msg_data; 551 CREDENTIALS cred; 552 des_key_schedule sched; 553 int s; 554 int ret; 555 556 s = do_connect (host, port, 1); 557 if (s < 0) 558 return 1; 559 ret = krb_sendauth(0, 560 s, 561 &ticket, 562 "pop", 563 (char *)host, 564 krb_realmofhost(host), 565 getpid(), 566 &msg_data, 567 &cred, 568 sched, 569 NULL, 570 NULL, 571 "KPOPV0.1"); 572 if(ret) { 573 warnx("krb_sendauth: %s", krb_get_err_text(ret)); 574 return 1; 575 } 576 return doit (s, host, user, filename, header_str, leavep, verbose, forkp); 577 } 578 #endif /* KRB4 */ 579 580 #ifdef HESIOD 581 582 #ifdef HESIOD_INTERFACES 583 584 static char * 585 hesiod_get_pobox (const char **user) 586 { 587 void *context; 588 struct hesiod_postoffice *hpo; 589 char *ret = NULL; 590 591 if(hesiod_init (&context) != 0) 592 err (1, "hesiod_init"); 593 594 hpo = hesiod_getmailhost (context, *user); 595 if (hpo == NULL) { 596 warn ("hesiod_getmailhost %s", *user); 597 } else { 598 if (strcasecmp(hpo->hesiod_po_type, "pop") != 0) 599 errx (1, "Unsupported po type %s", hpo->hesiod_po_type); 600 601 ret = estrdup(hpo->hesiod_po_host); 602 *user = estrdup(hpo->hesiod_po_name); 603 hesiod_free_postoffice (context, hpo); 604 } 605 hesiod_end (context); 606 return ret; 607 } 608 609 #else /* !HESIOD_INTERFACES */ 610 611 static char * 612 hesiod_get_pobox (const char **user) 613 { 614 char *ret = NULL; 615 struct hes_postoffice *hpo; 616 617 hpo = hes_getmailhost (*user); 618 if (hpo == NULL) { 619 warn ("hes_getmailhost %s", *user); 620 } else { 621 if (strcasecmp(hpo->po_type, "pop") != 0) 622 errx (1, "Unsupported po type %s", hpo->po_type); 623 624 ret = estrdup(hpo->po_host); 625 *user = estrdup(hpo->po_name); 626 } 627 return ret; 628 } 629 630 #endif /* HESIOD_INTERFACES */ 631 632 #endif /* HESIOD */ 633 634 static char * 635 get_pobox (const char **user) 636 { 637 char *ret = NULL; 638 639 #ifdef HESIOD 640 ret = hesiod_get_pobox (user); 641 #endif 642 643 if (ret == NULL) 644 ret = getenv("MAILHOST"); 645 if (ret == NULL) 646 errx (1, "MAILHOST not set"); 647 return ret; 648 } 649 650 static void 651 parse_pobox (char *a0, const char **host, const char **user) 652 { 653 const char *h, *u; 654 char *p; 655 int po = 0; 656 657 if (a0 == NULL) { 658 659 *user = getenv ("USERNAME"); 660 if (*user == NULL) { 661 struct passwd *pwd = getpwuid (getuid ()); 662 663 if (pwd == NULL) 664 errx (1, "Who are you?"); 665 *user = estrdup (pwd->pw_name); 666 } 667 *host = get_pobox (user); 668 return; 669 } 670 671 /* if the specification starts with po:, remember this information */ 672 if(strncmp(a0, "po:", 3) == 0) { 673 a0 += 3; 674 po++; 675 } 676 /* if there is an `@', the hostname is after it, otherwise at the 677 beginning of the string */ 678 p = strchr(a0, '@'); 679 if(p != NULL) { 680 *p++ = '\0'; 681 h = p; 682 } else { 683 h = a0; 684 } 685 /* if there is a `:', the username comes before it, otherwise at 686 the beginning of the string */ 687 p = strchr(a0, ':'); 688 if(p != NULL) { 689 *p++ = '\0'; 690 u = p; 691 } else { 692 u = a0; 693 } 694 if(h == u) { 695 /* some inconsistent compatibility with various mailers */ 696 if(po) { 697 h = get_pobox (&u); 698 } else { 699 u = get_default_username (); 700 if (u == NULL) 701 errx (1, "Who are you?"); 702 } 703 } 704 *host = h; 705 *user = u; 706 } 707 708 int 709 main(int argc, char **argv) 710 { 711 int port = 0; 712 int optind = 0; 713 int ret = 1; 714 const char *host, *user, *filename = NULL; 715 char *pobox = NULL; 716 717 setprogname (argv[0]); 718 719 #ifdef KRB5 720 { 721 krb5_error_code ret; 722 723 ret = krb5_init_context (&context); 724 if (ret) 725 errx (1, "krb5_init_context failed: %d", ret); 726 } 727 #endif 728 729 if (getarg (args, sizeof(args) / sizeof(args[0]), argc, argv, 730 &optind)) 731 usage (1); 732 733 argc -= optind; 734 argv += optind; 735 736 #if defined(KRB4) && defined(KRB5) 737 if(use_v4 == -1 && use_v5 == 1) 738 use_v4 = 0; 739 if(use_v5 == -1 && use_v4 == 1) 740 use_v5 = 0; 741 #endif 742 743 if (do_help) 744 usage (0); 745 746 if (do_version) { 747 print_version(NULL); 748 return 0; 749 } 750 751 if (do_from && header_str == NULL) 752 header_str = "From:"; 753 else if (header_str != NULL) 754 do_from = 1; 755 756 if (do_from) { 757 if (argc == 0) 758 pobox = NULL; 759 else if (argc == 1) 760 pobox = argv[0]; 761 else 762 usage (1); 763 } else { 764 if (argc == 1) { 765 filename = argv[0]; 766 pobox = NULL; 767 } else if (argc == 2) { 768 filename = argv[1]; 769 pobox = argv[0]; 770 } else 771 usage (1); 772 } 773 774 if (port_str) { 775 struct servent *s = roken_getservbyname (port_str, "tcp"); 776 777 if (s) 778 port = s->s_port; 779 else { 780 char *ptr; 781 782 port = strtol (port_str, &ptr, 10); 783 if (port == 0 && ptr == port_str) 784 errx (1, "Bad port `%s'", port_str); 785 port = htons(port); 786 } 787 } 788 if (port == 0) { 789 #ifdef KRB5 790 port = krb5_getportbyname (context, "kpop", "tcp", 1109); 791 #elif defined(KRB4) 792 port = k_getportbyname ("kpop", "tcp", htons(1109)); 793 #else 794 #error must define KRB4 or KRB5 795 #endif 796 } 797 798 parse_pobox (pobox, &host, &user); 799 800 #ifdef KRB5 801 if (ret && use_v5) { 802 ret = do_v5 (host, port, user, filename, header_str, 803 do_leave, verbose_level, do_fork); 804 } 805 #endif 806 807 #ifdef KRB4 808 if (ret && use_v4) { 809 ret = do_v4 (host, port, user, filename, header_str, 810 do_leave, verbose_level, do_fork); 811 } 812 #endif /* KRB4 */ 813 return ret; 814 } 815