1 /* $NetBSD: ftp.c,v 1.142 2006/10/23 19:53:24 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2005 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, 1989, 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. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Copyright (C) 1997 and 1998 WIDE Project. 70 * All rights reserved. 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. Neither the name of the project nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97 #include <sys/cdefs.h> 98 #ifndef lint 99 #if 0 100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101 #else 102 __RCSID("$NetBSD: ftp.c,v 1.142 2006/10/23 19:53:24 christos Exp $"); 103 #endif 104 #endif /* not lint */ 105 106 #include <sys/types.h> 107 #include <sys/stat.h> 108 #include <sys/socket.h> 109 #include <sys/time.h> 110 111 #include <netinet/in.h> 112 #include <netinet/in_systm.h> 113 #include <netinet/ip.h> 114 #include <arpa/inet.h> 115 #include <arpa/ftp.h> 116 #include <arpa/telnet.h> 117 118 #include <ctype.h> 119 #include <err.h> 120 #include <errno.h> 121 #include <fcntl.h> 122 #include <netdb.h> 123 #include <stdio.h> 124 #include <stdlib.h> 125 #include <string.h> 126 #include <time.h> 127 #include <unistd.h> 128 #include <stdarg.h> 129 130 #include "ftp_var.h" 131 132 volatile sig_atomic_t abrtflag; 133 volatile sig_atomic_t timeoutflag; 134 135 sigjmp_buf ptabort; 136 int ptabflg; 137 int ptflag = 0; 138 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 139 140 static int empty(FILE *, FILE *, int); 141 142 struct sockinet { 143 union sockunion { 144 struct sockaddr_in su_sin; 145 #ifdef INET6 146 struct sockaddr_in6 su_sin6; 147 #endif 148 } si_su; 149 #if !HAVE_SOCKADDR_SA_LEN 150 int si_len; 151 #endif 152 }; 153 154 #if !HAVE_SOCKADDR_SA_LEN 155 # define su_len si_len 156 #else 157 # define su_len si_su.su_sin.sin_len 158 #endif 159 #define su_family si_su.su_sin.sin_family 160 #define su_port si_su.su_sin.sin_port 161 162 struct sockinet myctladdr, hisctladdr, data_addr; 163 164 char * 165 hookup(char *host, char *port) 166 { 167 int s = -1, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 char *cause = "unknown"; 172 socklen_t len; 173 int on = 1; 174 175 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 176 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 177 memset(&hints, 0, sizeof(hints)); 178 portnum = parseport(port, FTP_PORT); 179 hints.ai_flags = AI_CANONNAME; 180 hints.ai_family = family; 181 hints.ai_socktype = SOCK_STREAM; 182 hints.ai_protocol = 0; 183 error = getaddrinfo(host, NULL, &hints, &res0); 184 if (error) { 185 warnx("%s: %s", host, gai_strerror(error)); 186 code = -1; 187 return (0); 188 } 189 190 if (res0->ai_canonname) 191 (void)strlcpy(hostnamebuf, res0->ai_canonname, 192 sizeof(hostnamebuf)); 193 else 194 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 195 hostname = hostnamebuf; 196 197 for (res = res0; res; res = res->ai_next) { 198 /* 199 * make sure that ai_addr is NOT an IPv4 mapped address. 200 * IPv4 mapped address complicates too many things in FTP 201 * protocol handling, as FTP protocol is defined differently 202 * between IPv4 and IPv6. 203 * 204 * This may not be the best way to handle this situation, 205 * since the semantics of IPv4 mapped address is defined in 206 * the kernel. There are configurations where we should use 207 * IPv4 mapped address as native IPv6 address, not as 208 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 209 * 210 * More complete solution would be to have an additional 211 * getsockopt to grab "real" peername/sockname. "real" 212 * peername/sockname will be AF_INET if IPv4 mapped address 213 * is used to embed IPv4 address, and will be AF_INET6 if 214 * we use it as native. What a mess! 215 */ 216 ai_unmapped(res); 217 if (verbose && res0->ai_next) { 218 /* if we have multiple possibilities */ 219 if (getnameinfo(res->ai_addr, res->ai_addrlen, 220 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 221 strlcpy(hbuf, "?", sizeof(hbuf)); 222 fprintf(ttyout, "Trying %s...\n", hbuf); 223 } 224 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 225 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 226 if (s < 0) { 227 cause = "socket"; 228 continue; 229 } 230 error = ftp_connect(s, res->ai_addr, res->ai_addrlen); 231 if (error) { 232 /* this "if" clause is to prevent print warning twice */ 233 if (res->ai_next) { 234 if (getnameinfo(res->ai_addr, res->ai_addrlen, 235 hbuf, sizeof(hbuf), NULL, 0, 236 NI_NUMERICHOST)) 237 strlcpy(hbuf, "?", sizeof(hbuf)); 238 warn("connect to address %s", hbuf); 239 } 240 cause = "connect"; 241 close(s); 242 s = -1; 243 continue; 244 } 245 246 /* finally we got one */ 247 break; 248 } 249 if (s < 0) { 250 warn("%s", cause); 251 code = -1; 252 freeaddrinfo(res0); 253 return 0; 254 } 255 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 256 hisctladdr.su_len = res->ai_addrlen; 257 freeaddrinfo(res0); 258 res0 = res = NULL; 259 260 len = hisctladdr.su_len; 261 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 262 warn("getsockname"); 263 code = -1; 264 goto bad; 265 } 266 myctladdr.su_len = len; 267 268 #ifdef IPTOS_LOWDELAY 269 if (hisctladdr.su_family == AF_INET) { 270 int tos = IPTOS_LOWDELAY; 271 if (setsockopt(s, IPPROTO_IP, IP_TOS, 272 (void *)&tos, sizeof(tos)) == -1) { 273 DWARN("setsockopt %s (ignored)", 274 "IPTOS_LOWDELAY"); 275 } 276 } 277 #endif 278 cin = fdopen(s, "r"); 279 cout = fdopen(s, "w"); 280 if (cin == NULL || cout == NULL) { 281 warnx("fdopen failed."); 282 if (cin) 283 (void)fclose(cin); 284 if (cout) 285 (void)fclose(cout); 286 code = -1; 287 goto bad; 288 } 289 if (verbose) 290 fprintf(ttyout, "Connected to %s.\n", hostname); 291 if (getreply(0) > 2) { /* read startup message from server */ 292 if (cin) 293 (void)fclose(cin); 294 if (cout) 295 (void)fclose(cout); 296 code = -1; 297 goto bad; 298 } 299 300 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 301 (void *)&on, sizeof(on)) == -1) { 302 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 303 } 304 305 return (hostname); 306 bad: 307 (void)close(s); 308 return (NULL); 309 } 310 311 void 312 cmdabort(int notused) 313 { 314 int oerrno = errno; 315 316 sigint_raised = 1; 317 alarmtimer(0); 318 if (fromatty) 319 write(fileno(ttyout), "\n", 1); 320 abrtflag++; 321 if (ptflag) 322 siglongjmp(ptabort, 1); 323 errno = oerrno; 324 } 325 326 void 327 cmdtimeout(int notused) 328 { 329 int oerrno = errno; 330 331 alarmtimer(0); 332 if (fromatty) 333 write(fileno(ttyout), "\n", 1); 334 timeoutflag++; 335 if (ptflag) 336 siglongjmp(ptabort, 1); 337 errno = oerrno; 338 } 339 340 /*VARARGS*/ 341 int 342 command(const char *fmt, ...) 343 { 344 va_list ap; 345 int r; 346 sigfunc oldsigint; 347 348 #ifndef NO_DEBUG 349 if (ftp_debug) { 350 fputs("---> ", ttyout); 351 va_start(ap, fmt); 352 if (strncmp("PASS ", fmt, 5) == 0) 353 fputs("PASS XXXX", ttyout); 354 else if (strncmp("ACCT ", fmt, 5) == 0) 355 fputs("ACCT XXXX", ttyout); 356 else 357 vfprintf(ttyout, fmt, ap); 358 va_end(ap); 359 putc('\n', ttyout); 360 } 361 #endif 362 if (cout == NULL) { 363 warnx("No control connection for command."); 364 code = -1; 365 return (0); 366 } 367 368 abrtflag = 0; 369 370 oldsigint = xsignal(SIGINT, cmdabort); 371 372 va_start(ap, fmt); 373 vfprintf(cout, fmt, ap); 374 va_end(ap); 375 fputs("\r\n", cout); 376 (void)fflush(cout); 377 cpend = 1; 378 r = getreply(!strcmp(fmt, "QUIT")); 379 if (abrtflag && oldsigint != SIG_IGN) 380 (*oldsigint)(SIGINT); 381 (void)xsignal(SIGINT, oldsigint); 382 return (r); 383 } 384 385 static const char *m421[] = { 386 "remote server timed out. Connection closed", 387 "user interrupt. Connection closed", 388 "remote server has closed connection", 389 }; 390 391 int 392 getreply(int expecteof) 393 { 394 char current_line[BUFSIZ]; /* last line of previous reply */ 395 int c, n, line; 396 int dig; 397 int originalcode = 0, continuation = 0; 398 sigfunc oldsigint, oldsigalrm; 399 int pflag = 0; 400 char *cp, *pt = pasv; 401 402 abrtflag = 0; 403 timeoutflag = 0; 404 405 oldsigint = xsignal(SIGINT, cmdabort); 406 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 407 408 for (line = 0 ;; line++) { 409 dig = n = code = 0; 410 cp = current_line; 411 while (alarmtimer(quit_time ? quit_time : 60), 412 ((c = getc(cin)) != '\n')) { 413 if (c == IAC) { /* handle telnet commands */ 414 switch (c = getc(cin)) { 415 case WILL: 416 case WONT: 417 c = getc(cin); 418 fprintf(cout, "%c%c%c", IAC, DONT, c); 419 (void)fflush(cout); 420 break; 421 case DO: 422 case DONT: 423 c = getc(cin); 424 fprintf(cout, "%c%c%c", IAC, WONT, c); 425 (void)fflush(cout); 426 break; 427 default: 428 break; 429 } 430 continue; 431 } 432 dig++; 433 if (c == EOF) { 434 /* 435 * these will get trashed by pswitch() 436 * in lostpeer() 437 */ 438 int reply_timeoutflag = timeoutflag; 439 int reply_abrtflag = abrtflag; 440 441 alarmtimer(0); 442 if (expecteof && feof(cin)) { 443 (void)xsignal(SIGINT, oldsigint); 444 (void)xsignal(SIGALRM, oldsigalrm); 445 code = 221; 446 return (0); 447 } 448 cpend = 0; 449 lostpeer(0); 450 if (verbose) { 451 size_t midx; 452 if (reply_timeoutflag) 453 midx = 0; 454 else if (reply_abrtflag) 455 midx = 1; 456 else 457 midx = 2; 458 (void)fprintf(ttyout, 459 "421 Service not available, %s.\n", m421[midx]); 460 (void)fflush(ttyout); 461 } 462 code = 421; 463 (void)xsignal(SIGINT, oldsigint); 464 (void)xsignal(SIGALRM, oldsigalrm); 465 return (4); 466 } 467 if (c != '\r' && (verbose > 0 || 468 ((verbose > -1 && n == '5' && dig > 4) && 469 (((!n && c < '5') || (n && n < '5')) 470 || !retry_connect)))) { 471 if (proxflag && 472 (dig == 1 || (dig == 5 && verbose == 0))) 473 fprintf(ttyout, "%s:", hostname); 474 (void)putc(c, ttyout); 475 } 476 if (dig < 4 && isdigit(c)) 477 code = code * 10 + (c - '0'); 478 if (!pflag && (code == 227 || code == 228)) 479 pflag = 1; 480 else if (!pflag && code == 229) 481 pflag = 100; 482 if (dig > 4 && pflag == 1 && isdigit(c)) 483 pflag = 2; 484 if (pflag == 2) { 485 if (c != '\r' && c != ')') { 486 if (pt < &pasv[sizeof(pasv) - 1]) 487 *pt++ = c; 488 } else { 489 *pt = '\0'; 490 pflag = 3; 491 } 492 } 493 if (pflag == 100 && c == '(') 494 pflag = 2; 495 if (dig == 4 && c == '-') { 496 if (continuation) 497 code = 0; 498 continuation++; 499 } 500 if (n == 0) 501 n = c; 502 if (cp < ¤t_line[sizeof(current_line) - 1]) 503 *cp++ = c; 504 } 505 if (verbose > 0 || ((verbose > -1 && n == '5') && 506 (n < '5' || !retry_connect))) { 507 (void)putc(c, ttyout); 508 (void)fflush (ttyout); 509 } 510 if (cp[-1] == '\r') 511 cp[-1] = '\0'; 512 *cp = '\0'; 513 if (line == 0) 514 (void)strlcpy(reply_string, current_line, 515 sizeof(reply_string)); 516 if (line > 0 && code == 0 && reply_callback != NULL) 517 (*reply_callback)(current_line); 518 if (continuation && code != originalcode) { 519 if (originalcode == 0) 520 originalcode = code; 521 continue; 522 } 523 if (n != '1') 524 cpend = 0; 525 alarmtimer(0); 526 (void)xsignal(SIGINT, oldsigint); 527 (void)xsignal(SIGALRM, oldsigalrm); 528 if (code == 421 || originalcode == 421) 529 lostpeer(0); 530 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 531 (*oldsigint)(SIGINT); 532 if (timeoutflag && oldsigalrm != cmdtimeout && 533 oldsigalrm != SIG_IGN) 534 (*oldsigalrm)(SIGINT); 535 return (n - '0'); 536 } 537 } 538 539 static int 540 empty(FILE *cin, FILE *din, int sec) 541 { 542 int nr, nfd; 543 struct pollfd pfd[2]; 544 545 nfd = 0; 546 if (cin) { 547 pfd[nfd].fd = fileno(cin); 548 pfd[nfd++].events = POLLIN; 549 } 550 551 if (din) { 552 pfd[nfd].fd = fileno(din); 553 pfd[nfd++].events = POLLIN; 554 } 555 556 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 557 return nr; 558 559 nr = 0; 560 nfd = 0; 561 if (cin) 562 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 563 if (din) 564 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 565 return nr; 566 } 567 568 sigjmp_buf xferabort; 569 570 void 571 abortxfer(int notused) 572 { 573 char msgbuf[100]; 574 size_t len; 575 576 sigint_raised = 1; 577 alarmtimer(0); 578 mflag = 0; 579 abrtflag = 0; 580 switch (direction[0]) { 581 case 'r': 582 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 583 break; 584 case 's': 585 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 586 break; 587 default: 588 errx(1, "abortxfer called with unknown direction `%s'", 589 direction); 590 } 591 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 592 sizeof(msgbuf)); 593 write(fileno(ttyout), msgbuf, len); 594 siglongjmp(xferabort, 1); 595 } 596 597 void 598 sendrequest(const char *cmd, const char *local, const char *remote, 599 int printnames) 600 { 601 struct stat st; 602 int c, d; 603 FILE *fin, *dout; 604 int (*closefunc)(FILE *); 605 sigfunc oldintr, oldintp; 606 volatile off_t hashbytes; 607 char *lmode, *bufp; 608 static size_t bufsize; 609 static char *buf; 610 int oprogress; 611 612 #ifdef __GNUC__ /* to shut up gcc warnings */ 613 (void)&fin; 614 (void)&dout; 615 (void)&closefunc; 616 (void)&oldintr; 617 (void)&oldintp; 618 (void)&lmode; 619 fin = NULL; /* XXX gcc4 */ 620 #endif 621 622 hashbytes = mark; 623 direction = "sent"; 624 dout = NULL; 625 bytes = 0; 626 filesize = -1; 627 oprogress = progress; 628 if (verbose && printnames) { 629 if (*local != '-') 630 fprintf(ttyout, "local: %s ", local); 631 if (remote) 632 fprintf(ttyout, "remote: %s\n", remote); 633 } 634 if (proxy) { 635 proxtrans(cmd, local, remote); 636 return; 637 } 638 if (curtype != type) 639 changetype(type, 0); 640 closefunc = NULL; 641 oldintr = NULL; 642 oldintp = NULL; 643 lmode = "w"; 644 if (sigsetjmp(xferabort, 1)) { 645 while (cpend) 646 (void)getreply(0); 647 code = -1; 648 goto cleanupsend; 649 } 650 (void)xsignal(SIGQUIT, psummary); 651 oldintr = xsignal(SIGINT, abortxfer); 652 if (strcmp(local, "-") == 0) { 653 fin = stdin; 654 progress = 0; 655 } else if (*local == '|') { 656 oldintp = xsignal(SIGPIPE, SIG_IGN); 657 fin = popen(local + 1, "r"); 658 if (fin == NULL) { 659 warn("%s", local + 1); 660 code = -1; 661 goto cleanupsend; 662 } 663 progress = 0; 664 closefunc = pclose; 665 } else { 666 fin = fopen(local, "r"); 667 if (fin == NULL) { 668 warn("local: %s", local); 669 code = -1; 670 goto cleanupsend; 671 } 672 closefunc = fclose; 673 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 674 fprintf(ttyout, "%s: not a plain file.\n", local); 675 code = -1; 676 goto cleanupsend; 677 } 678 filesize = st.st_size; 679 } 680 if (initconn()) { 681 code = -1; 682 goto cleanupsend; 683 } 684 if (sigsetjmp(xferabort, 1)) 685 goto abort; 686 687 if (restart_point && 688 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 689 int rc; 690 691 rc = -1; 692 switch (curtype) { 693 case TYPE_A: 694 rc = fseeko(fin, restart_point, SEEK_SET); 695 break; 696 case TYPE_I: 697 case TYPE_L: 698 rc = lseek(fileno(fin), restart_point, SEEK_SET); 699 break; 700 } 701 if (rc < 0) { 702 warn("local: %s", local); 703 goto cleanupsend; 704 } 705 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 706 goto cleanupsend; 707 lmode = "r+"; 708 } 709 if (remote) { 710 if (command("%s %s", cmd, remote) != PRELIM) 711 goto cleanupsend; 712 } else { 713 if (command("%s", cmd) != PRELIM) 714 goto cleanupsend; 715 } 716 dirchange = 1; 717 dout = dataconn(lmode); 718 if (dout == NULL) 719 goto abort; 720 721 if (sndbuf_size > bufsize) { 722 if (buf) 723 (void)free(buf); 724 bufsize = sndbuf_size; 725 buf = ftp_malloc(bufsize); 726 } 727 728 progressmeter(-1); 729 oldintp = xsignal(SIGPIPE, SIG_IGN); 730 731 switch (curtype) { 732 733 case TYPE_I: 734 case TYPE_L: 735 if (rate_put) { /* rate limited */ 736 while (1) { 737 struct timeval then, now, td; 738 off_t bufrem; 739 740 (void)gettimeofday(&then, NULL); 741 errno = c = d = 0; 742 bufrem = rate_put; 743 while (bufrem > 0) { 744 if ((c = read(fileno(fin), buf, 745 MIN(bufsize, bufrem))) <= 0) 746 goto senddone; 747 bytes += c; 748 bufrem -= c; 749 for (bufp = buf; c > 0; 750 c -= d, bufp += d) 751 if ((d = write(fileno(dout), 752 bufp, c)) <= 0) 753 break; 754 if (d < 0) 755 goto senddone; 756 if (hash && 757 (!progress || filesize < 0) ) { 758 while (bytes >= hashbytes) { 759 (void)putc('#', ttyout); 760 hashbytes += mark; 761 } 762 (void)fflush(ttyout); 763 } 764 } 765 while (1) { 766 (void)gettimeofday(&now, NULL); 767 timersub(&now, &then, &td); 768 if (td.tv_sec > 0) 769 break; 770 usleep(1000000 - td.tv_usec); 771 } 772 } 773 } else { /* simpler/faster; no rate limit */ 774 while (1) { 775 errno = c = d = 0; 776 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 777 goto senddone; 778 bytes += c; 779 for (bufp = buf; c > 0; c -= d, bufp += d) 780 if ((d = write(fileno(dout), bufp, c)) 781 <= 0) 782 break; 783 if (d < 0) 784 goto senddone; 785 if (hash && (!progress || filesize < 0) ) { 786 while (bytes >= hashbytes) { 787 (void)putc('#', ttyout); 788 hashbytes += mark; 789 } 790 (void)fflush(ttyout); 791 } 792 } 793 } 794 senddone: 795 if (hash && (!progress || filesize < 0) && bytes > 0) { 796 if (bytes < mark) 797 (void)putc('#', ttyout); 798 (void)putc('\n', ttyout); 799 } 800 if (c < 0) 801 warn("local: %s", local); 802 if (d < 0) { 803 if (errno != EPIPE) 804 warn("netout"); 805 bytes = -1; 806 } 807 break; 808 809 case TYPE_A: 810 while ((c = getc(fin)) != EOF) { 811 if (c == '\n') { 812 while (hash && (!progress || filesize < 0) && 813 (bytes >= hashbytes)) { 814 (void)putc('#', ttyout); 815 (void)fflush(ttyout); 816 hashbytes += mark; 817 } 818 if (ferror(dout)) 819 break; 820 (void)putc('\r', dout); 821 bytes++; 822 } 823 (void)putc(c, dout); 824 bytes++; 825 #if 0 /* this violates RFC */ 826 if (c == '\r') { 827 (void)putc('\0', dout); 828 bytes++; 829 } 830 #endif 831 } 832 if (hash && (!progress || filesize < 0)) { 833 if (bytes < hashbytes) 834 (void)putc('#', ttyout); 835 (void)putc('\n', ttyout); 836 } 837 if (ferror(fin)) 838 warn("local: %s", local); 839 if (ferror(dout)) { 840 if (errno != EPIPE) 841 warn("netout"); 842 bytes = -1; 843 } 844 break; 845 } 846 847 progressmeter(1); 848 if (closefunc != NULL) { 849 (*closefunc)(fin); 850 fin = NULL; 851 } 852 (void)fclose(dout); 853 dout = NULL; 854 (void)getreply(0); 855 if (bytes > 0) 856 ptransfer(0); 857 goto cleanupsend; 858 859 abort: 860 (void)xsignal(SIGINT, oldintr); 861 oldintr = NULL; 862 if (!cpend) { 863 code = -1; 864 goto cleanupsend; 865 } 866 if (data >= 0) { 867 (void)close(data); 868 data = -1; 869 } 870 if (dout) { 871 (void)fclose(dout); 872 dout = NULL; 873 } 874 (void)getreply(0); 875 code = -1; 876 if (bytes > 0) 877 ptransfer(0); 878 879 cleanupsend: 880 if (oldintr) 881 (void)xsignal(SIGINT, oldintr); 882 if (oldintp) 883 (void)xsignal(SIGPIPE, oldintp); 884 if (data >= 0) { 885 (void)close(data); 886 data = -1; 887 } 888 if (closefunc != NULL && fin != NULL) 889 (*closefunc)(fin); 890 if (dout) 891 (void)fclose(dout); 892 progress = oprogress; 893 restart_point = 0; 894 bytes = 0; 895 } 896 897 void 898 recvrequest(const char *cmd, const char *local, const char *remote, 899 const char *lmode, int printnames, int ignorespecial) 900 { 901 FILE *fout, *din; 902 int (*closefunc)(FILE *); 903 sigfunc oldintr, oldintp; 904 int c, d; 905 volatile int is_retr, tcrflag, bare_lfs; 906 static size_t bufsize; 907 static char *buf; 908 volatile off_t hashbytes; 909 struct stat st; 910 time_t mtime; 911 struct timeval tval[2]; 912 int oprogress; 913 int opreserve; 914 915 #ifdef __GNUC__ /* to shut up gcc warnings */ 916 (void)&local; 917 (void)&fout; 918 (void)&din; 919 (void)&closefunc; 920 (void)&oldintr; 921 (void)&oldintp; 922 #endif 923 924 fout = NULL; 925 din = NULL; 926 hashbytes = mark; 927 direction = "received"; 928 bytes = 0; 929 bare_lfs = 0; 930 filesize = -1; 931 oprogress = progress; 932 opreserve = preserve; 933 is_retr = (strcmp(cmd, "RETR") == 0); 934 if (is_retr && verbose && printnames) { 935 if (ignorespecial || *local != '-') 936 fprintf(ttyout, "local: %s ", local); 937 if (remote) 938 fprintf(ttyout, "remote: %s\n", remote); 939 } 940 if (proxy && is_retr) { 941 proxtrans(cmd, local, remote); 942 return; 943 } 944 closefunc = NULL; 945 oldintr = NULL; 946 oldintp = NULL; 947 tcrflag = !crflag && is_retr; 948 if (sigsetjmp(xferabort, 1)) { 949 while (cpend) 950 (void)getreply(0); 951 code = -1; 952 goto cleanuprecv; 953 } 954 (void)xsignal(SIGQUIT, psummary); 955 oldintr = xsignal(SIGINT, abortxfer); 956 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 957 if (access(local, W_OK) < 0) { 958 char *dir = strrchr(local, '/'); 959 960 if (errno != ENOENT && errno != EACCES) { 961 warn("local: %s", local); 962 code = -1; 963 goto cleanuprecv; 964 } 965 if (dir != NULL) 966 *dir = 0; 967 d = access(dir == local ? "/" : 968 dir ? local : ".", W_OK); 969 if (dir != NULL) 970 *dir = '/'; 971 if (d < 0) { 972 warn("local: %s", local); 973 code = -1; 974 goto cleanuprecv; 975 } 976 if (!runique && errno == EACCES && 977 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 978 warn("local: %s", local); 979 code = -1; 980 goto cleanuprecv; 981 } 982 if (runique && errno == EACCES && 983 (local = gunique(local)) == NULL) { 984 code = -1; 985 goto cleanuprecv; 986 } 987 } 988 else if (runique && (local = gunique(local)) == NULL) { 989 code = -1; 990 goto cleanuprecv; 991 } 992 } 993 if (!is_retr) { 994 if (curtype != TYPE_A) 995 changetype(TYPE_A, 0); 996 } else { 997 if (curtype != type) 998 changetype(type, 0); 999 filesize = remotesize(remote, 0); 1000 if (code == 421 || code == -1) 1001 goto cleanuprecv; 1002 } 1003 if (initconn()) { 1004 code = -1; 1005 goto cleanuprecv; 1006 } 1007 if (sigsetjmp(xferabort, 1)) 1008 goto abort; 1009 if (is_retr && restart_point && 1010 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1011 goto cleanuprecv; 1012 if (! EMPTYSTRING(remote)) { 1013 if (command("%s %s", cmd, remote) != PRELIM) 1014 goto cleanuprecv; 1015 } else { 1016 if (command("%s", cmd) != PRELIM) 1017 goto cleanuprecv; 1018 } 1019 din = dataconn("r"); 1020 if (din == NULL) 1021 goto abort; 1022 if (!ignorespecial && strcmp(local, "-") == 0) { 1023 fout = stdout; 1024 progress = 0; 1025 preserve = 0; 1026 } else if (!ignorespecial && *local == '|') { 1027 oldintp = xsignal(SIGPIPE, SIG_IGN); 1028 fout = popen(local + 1, "w"); 1029 if (fout == NULL) { 1030 warn("%s", local+1); 1031 goto abort; 1032 } 1033 progress = 0; 1034 preserve = 0; 1035 closefunc = pclose; 1036 } else { 1037 fout = fopen(local, lmode); 1038 if (fout == NULL) { 1039 warn("local: %s", local); 1040 goto abort; 1041 } 1042 closefunc = fclose; 1043 } 1044 1045 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1046 progress = 0; 1047 preserve = 0; 1048 } 1049 if (rcvbuf_size > bufsize) { 1050 if (buf) 1051 (void)free(buf); 1052 bufsize = rcvbuf_size; 1053 buf = ftp_malloc(bufsize); 1054 } 1055 1056 progressmeter(-1); 1057 1058 switch (curtype) { 1059 1060 case TYPE_I: 1061 case TYPE_L: 1062 if (is_retr && restart_point && 1063 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1064 warn("local: %s", local); 1065 goto cleanuprecv; 1066 } 1067 if (rate_get) { /* rate limiting */ 1068 while (1) { 1069 struct timeval then, now, td; 1070 off_t bufrem; 1071 1072 (void)gettimeofday(&then, NULL); 1073 errno = c = d = 0; 1074 for (bufrem = rate_get; bufrem > 0; ) { 1075 if ((c = read(fileno(din), buf, 1076 MIN(bufsize, bufrem))) <= 0) 1077 goto recvdone; 1078 bytes += c; 1079 bufrem -=c; 1080 if ((d = write(fileno(fout), buf, c)) 1081 != c) 1082 goto recvdone; 1083 if (hash && 1084 (!progress || filesize < 0)) { 1085 while (bytes >= hashbytes) { 1086 (void)putc('#', ttyout); 1087 hashbytes += mark; 1088 } 1089 (void)fflush(ttyout); 1090 } 1091 } 1092 /* sleep until time is up */ 1093 while (1) { 1094 (void)gettimeofday(&now, NULL); 1095 timersub(&now, &then, &td); 1096 if (td.tv_sec > 0) 1097 break; 1098 usleep(1000000 - td.tv_usec); 1099 } 1100 } 1101 } else { /* faster code (no limiting) */ 1102 while (1) { 1103 errno = c = d = 0; 1104 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1105 goto recvdone; 1106 bytes += c; 1107 if ((d = write(fileno(fout), buf, c)) != c) 1108 goto recvdone; 1109 if (hash && (!progress || filesize < 0)) { 1110 while (bytes >= hashbytes) { 1111 (void)putc('#', ttyout); 1112 hashbytes += mark; 1113 } 1114 (void)fflush(ttyout); 1115 } 1116 } 1117 } 1118 recvdone: 1119 if (hash && (!progress || filesize < 0) && bytes > 0) { 1120 if (bytes < mark) 1121 (void)putc('#', ttyout); 1122 (void)putc('\n', ttyout); 1123 } 1124 if (c < 0) { 1125 if (errno != EPIPE) 1126 warn("netin"); 1127 bytes = -1; 1128 } 1129 if (d < c) { 1130 if (d < 0) 1131 warn("local: %s", local); 1132 else 1133 warnx("%s: short write", local); 1134 } 1135 break; 1136 1137 case TYPE_A: 1138 if (is_retr && restart_point) { 1139 int ch; 1140 off_t i; 1141 1142 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1143 goto done; 1144 for (i = 0; i++ < restart_point;) { 1145 if ((ch = getc(fout)) == EOF) 1146 goto done; 1147 if (ch == '\n') 1148 i++; 1149 } 1150 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1151 done: 1152 warn("local: %s", local); 1153 goto cleanuprecv; 1154 } 1155 } 1156 while ((c = getc(din)) != EOF) { 1157 if (c == '\n') 1158 bare_lfs++; 1159 while (c == '\r') { 1160 while (hash && (!progress || filesize < 0) && 1161 (bytes >= hashbytes)) { 1162 (void)putc('#', ttyout); 1163 (void)fflush(ttyout); 1164 hashbytes += mark; 1165 } 1166 bytes++; 1167 if ((c = getc(din)) != '\n' || tcrflag) { 1168 if (ferror(fout)) 1169 goto break2; 1170 (void)putc('\r', fout); 1171 if (c == '\0') { 1172 bytes++; 1173 goto contin2; 1174 } 1175 if (c == EOF) 1176 goto contin2; 1177 } 1178 } 1179 (void)putc(c, fout); 1180 bytes++; 1181 contin2: ; 1182 } 1183 break2: 1184 if (hash && (!progress || filesize < 0)) { 1185 if (bytes < hashbytes) 1186 (void)putc('#', ttyout); 1187 (void)putc('\n', ttyout); 1188 } 1189 if (ferror(din)) { 1190 if (errno != EPIPE) 1191 warn("netin"); 1192 bytes = -1; 1193 } 1194 if (ferror(fout)) 1195 warn("local: %s", local); 1196 break; 1197 } 1198 1199 progressmeter(1); 1200 if (closefunc != NULL) { 1201 (*closefunc)(fout); 1202 fout = NULL; 1203 } 1204 (void)fclose(din); 1205 din = NULL; 1206 (void)getreply(0); 1207 if (bare_lfs) { 1208 fprintf(ttyout, 1209 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1210 bare_lfs); 1211 fputs("File may not have transferred correctly.\n", ttyout); 1212 } 1213 if (bytes >= 0 && is_retr) { 1214 if (bytes > 0) 1215 ptransfer(0); 1216 if (preserve && (closefunc == fclose)) { 1217 mtime = remotemodtime(remote, 0); 1218 if (mtime != -1) { 1219 (void)gettimeofday(&tval[0], NULL); 1220 tval[1].tv_sec = mtime; 1221 tval[1].tv_usec = 0; 1222 if (utimes(local, tval) == -1) { 1223 fprintf(ttyout, 1224 "Can't change modification time on %s to %s", 1225 local, asctime(localtime(&mtime))); 1226 } 1227 } 1228 } 1229 } 1230 goto cleanuprecv; 1231 1232 abort: 1233 /* 1234 * abort using RFC 959 recommended IP,SYNC sequence 1235 */ 1236 if (! sigsetjmp(xferabort, 1)) { 1237 /* this is the first call */ 1238 (void)xsignal(SIGINT, abort_squared); 1239 if (!cpend) { 1240 code = -1; 1241 goto cleanuprecv; 1242 } 1243 abort_remote(din); 1244 } 1245 code = -1; 1246 if (bytes > 0) 1247 ptransfer(0); 1248 1249 cleanuprecv: 1250 if (oldintr) 1251 (void)xsignal(SIGINT, oldintr); 1252 if (oldintp) 1253 (void)xsignal(SIGPIPE, oldintp); 1254 if (data >= 0) { 1255 (void)close(data); 1256 data = -1; 1257 } 1258 if (closefunc != NULL && fout != NULL) 1259 (*closefunc)(fout); 1260 if (din) 1261 (void)fclose(din); 1262 progress = oprogress; 1263 preserve = opreserve; 1264 bytes = 0; 1265 } 1266 1267 /* 1268 * Need to start a listen on the data channel before we send the command, 1269 * otherwise the server's connect may fail. 1270 */ 1271 int 1272 initconn(void) 1273 { 1274 char *p, *a; 1275 int result, tmpno = 0; 1276 int on = 1; 1277 int error; 1278 unsigned int addr[16], port[2]; 1279 unsigned int af, hal, pal; 1280 socklen_t len; 1281 char *pasvcmd = NULL; 1282 1283 #ifdef INET6 1284 #ifndef NO_DEBUG 1285 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1286 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1287 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1288 warnx("use of scoped address can be troublesome"); 1289 } 1290 #endif 1291 #endif 1292 reinit: 1293 if (passivemode) { 1294 data_addr = myctladdr; 1295 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1296 if (data < 0) { 1297 warn("socket"); 1298 return (1); 1299 } 1300 if ((options & SO_DEBUG) && 1301 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1302 (void *)&on, sizeof(on)) == -1) { 1303 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1304 } 1305 result = COMPLETE + 1; 1306 switch (data_addr.su_family) { 1307 case AF_INET: 1308 if (epsv4 && !epsv4bad) { 1309 pasvcmd = "EPSV"; 1310 result = command("EPSV"); 1311 if (!connected) 1312 return (1); 1313 /* 1314 * this code is to be friendly with broken 1315 * BSDI ftpd 1316 */ 1317 if (code / 10 == 22 && code != 229) { 1318 fputs( 1319 "wrong server: return code must be 229\n", 1320 ttyout); 1321 result = COMPLETE + 1; 1322 } 1323 if (result != COMPLETE) { 1324 epsv4bad = 1; 1325 DPRINTF("disabling epsv4 for this " 1326 "connection\n"); 1327 } 1328 } 1329 if (result != COMPLETE) { 1330 pasvcmd = "PASV"; 1331 result = command("PASV"); 1332 if (!connected) 1333 return (1); 1334 } 1335 break; 1336 #ifdef INET6 1337 case AF_INET6: 1338 pasvcmd = "EPSV"; 1339 result = command("EPSV"); 1340 if (!connected) 1341 return (1); 1342 /* this code is to be friendly with broken BSDI ftpd */ 1343 if (code / 10 == 22 && code != 229) { 1344 fputs( 1345 "wrong server: return code must be 229\n", 1346 ttyout); 1347 result = COMPLETE + 1; 1348 } 1349 if (result != COMPLETE) { 1350 pasvcmd = "LPSV"; 1351 result = command("LPSV"); 1352 } 1353 if (!connected) 1354 return (1); 1355 break; 1356 #endif 1357 default: 1358 result = COMPLETE + 1; 1359 break; 1360 } 1361 if (result != COMPLETE) { 1362 if (activefallback) { 1363 (void)close(data); 1364 data = -1; 1365 passivemode = 0; 1366 #if 0 1367 activefallback = 0; 1368 #endif 1369 goto reinit; 1370 } 1371 fputs("Passive mode refused.\n", ttyout); 1372 goto bad; 1373 } 1374 1375 #define pack2(var, off) \ 1376 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1377 #define pack4(var, off) \ 1378 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1379 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1380 #define UC(b) (((int)b)&0xff) 1381 1382 /* 1383 * What we've got at this point is a string of comma separated 1384 * one-byte unsigned integer values, separated by commas. 1385 */ 1386 if (strcmp(pasvcmd, "PASV") == 0) { 1387 if (data_addr.su_family != AF_INET) { 1388 fputs( 1389 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1390 error = 1; 1391 goto bad; 1392 } 1393 if (code / 10 == 22 && code != 227) { 1394 fputs("wrong server: return code must be 227\n", 1395 ttyout); 1396 error = 1; 1397 goto bad; 1398 } 1399 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1400 &addr[0], &addr[1], &addr[2], &addr[3], 1401 &port[0], &port[1]); 1402 if (error != 6) { 1403 fputs( 1404 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1405 error = 1; 1406 goto bad; 1407 } 1408 error = 0; 1409 memset(&data_addr, 0, sizeof(data_addr)); 1410 data_addr.su_family = AF_INET; 1411 data_addr.su_len = sizeof(struct sockaddr_in); 1412 data_addr.si_su.su_sin.sin_addr.s_addr = 1413 htonl(pack4(addr, 0)); 1414 data_addr.su_port = htons(pack2(port, 0)); 1415 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1416 if (code / 10 == 22 && code != 228) { 1417 fputs("wrong server: return code must be 228\n", 1418 ttyout); 1419 error = 1; 1420 goto bad; 1421 } 1422 switch (data_addr.su_family) { 1423 case AF_INET: 1424 error = sscanf(pasv, 1425 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1426 &af, &hal, 1427 &addr[0], &addr[1], &addr[2], &addr[3], 1428 &pal, &port[0], &port[1]); 1429 if (error != 9) { 1430 fputs( 1431 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1432 error = 1; 1433 goto bad; 1434 } 1435 if (af != 4 || hal != 4 || pal != 2) { 1436 fputs( 1437 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1438 error = 1; 1439 goto bad; 1440 } 1441 1442 error = 0; 1443 memset(&data_addr, 0, sizeof(data_addr)); 1444 data_addr.su_family = AF_INET; 1445 data_addr.su_len = sizeof(struct sockaddr_in); 1446 data_addr.si_su.su_sin.sin_addr.s_addr = 1447 htonl(pack4(addr, 0)); 1448 data_addr.su_port = htons(pack2(port, 0)); 1449 break; 1450 #ifdef INET6 1451 case AF_INET6: 1452 error = sscanf(pasv, 1453 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1454 &af, &hal, 1455 &addr[0], &addr[1], &addr[2], &addr[3], 1456 &addr[4], &addr[5], &addr[6], &addr[7], 1457 &addr[8], &addr[9], &addr[10], 1458 &addr[11], &addr[12], &addr[13], 1459 &addr[14], &addr[15], 1460 &pal, &port[0], &port[1]); 1461 if (error != 21) { 1462 fputs( 1463 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1464 error = 1; 1465 goto bad; 1466 } 1467 if (af != 6 || hal != 16 || pal != 2) { 1468 fputs( 1469 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1470 error = 1; 1471 goto bad; 1472 } 1473 1474 error = 0; 1475 memset(&data_addr, 0, sizeof(data_addr)); 1476 data_addr.su_family = AF_INET6; 1477 data_addr.su_len = sizeof(struct sockaddr_in6); 1478 { 1479 int i; 1480 for (i = 0; i < sizeof(struct in6_addr); i++) { 1481 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1482 UC(addr[i]); 1483 } 1484 } 1485 data_addr.su_port = htons(pack2(port, 0)); 1486 break; 1487 #endif 1488 default: 1489 error = 1; 1490 } 1491 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1492 char delim[4]; 1493 1494 port[0] = 0; 1495 if (code / 10 == 22 && code != 229) { 1496 fputs("wrong server: return code must be 229\n", 1497 ttyout); 1498 error = 1; 1499 goto bad; 1500 } 1501 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1502 &delim[1], &delim[2], &port[1], 1503 &delim[3]) != 5) { 1504 fputs("parse error!\n", ttyout); 1505 error = 1; 1506 goto bad; 1507 } 1508 if (delim[0] != delim[1] || delim[0] != delim[2] 1509 || delim[0] != delim[3]) { 1510 fputs("parse error!\n", ttyout); 1511 error = 1; 1512 goto bad; 1513 } 1514 data_addr = hisctladdr; 1515 data_addr.su_port = htons(port[1]); 1516 } else 1517 goto bad; 1518 1519 while (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1520 data_addr.su_len) < 0) { 1521 if (activefallback) { 1522 (void)close(data); 1523 data = -1; 1524 passivemode = 0; 1525 #if 0 1526 activefallback = 0; 1527 #endif 1528 goto reinit; 1529 } 1530 warn("connect for data channel"); 1531 goto bad; 1532 } 1533 #ifdef IPTOS_THROUGHPUT 1534 if (data_addr.su_family == AF_INET) { 1535 on = IPTOS_THROUGHPUT; 1536 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1537 (void *)&on, sizeof(on)) == -1) { 1538 DWARN("setsockopt %s (ignored)", 1539 "IPTOS_THROUGHPUT"); 1540 } 1541 } 1542 #endif 1543 return (0); 1544 } 1545 1546 noport: 1547 data_addr = myctladdr; 1548 if (sendport) 1549 data_addr.su_port = 0; /* let system pick one */ 1550 if (data != -1) 1551 (void)close(data); 1552 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1553 if (data < 0) { 1554 warn("socket"); 1555 if (tmpno) 1556 sendport = 1; 1557 return (1); 1558 } 1559 if (!sendport) 1560 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1561 (void *)&on, sizeof(on)) == -1) { 1562 warn("setsockopt %s", "SO_REUSEADDR"); 1563 goto bad; 1564 } 1565 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1566 data_addr.su_len) < 0) { 1567 warn("bind"); 1568 goto bad; 1569 } 1570 if ((options & SO_DEBUG) && 1571 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1572 (void *)&on, sizeof(on)) == -1) { 1573 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1574 } 1575 len = sizeof(data_addr.si_su); 1576 memset((char *)&data_addr, 0, sizeof (data_addr)); 1577 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1578 warn("getsockname"); 1579 goto bad; 1580 } 1581 data_addr.su_len = len; 1582 if (ftp_listen(data, 1) < 0) 1583 warn("listen"); 1584 1585 if (sendport) { 1586 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1587 int af; 1588 struct sockinet tmp; 1589 1590 switch (data_addr.su_family) { 1591 case AF_INET: 1592 if (!epsv4 || epsv4bad) { 1593 result = COMPLETE + 1; 1594 break; 1595 } 1596 /* FALLTHROUGH */ 1597 #ifdef INET6 1598 case AF_INET6: 1599 #endif 1600 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1601 tmp = data_addr; 1602 #ifdef INET6 1603 if (tmp.su_family == AF_INET6) 1604 tmp.si_su.su_sin6.sin6_scope_id = 0; 1605 #endif 1606 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1607 tmp.su_len, hname, sizeof(hname), sname, 1608 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1609 result = ERROR; 1610 } else { 1611 result = command("EPRT |%d|%s|%s|", af, hname, 1612 sname); 1613 if (!connected) 1614 return (1); 1615 if (result != COMPLETE) { 1616 epsv4bad = 1; 1617 DPRINTF("disabling epsv4 for this " 1618 "connection\n"); 1619 } 1620 } 1621 break; 1622 default: 1623 result = COMPLETE + 1; 1624 break; 1625 } 1626 if (result == COMPLETE) 1627 goto skip_port; 1628 1629 switch (data_addr.su_family) { 1630 case AF_INET: 1631 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1632 p = (char *)&data_addr.su_port; 1633 result = command("PORT %d,%d,%d,%d,%d,%d", 1634 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1635 UC(p[0]), UC(p[1])); 1636 break; 1637 #ifdef INET6 1638 case AF_INET6: 1639 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1640 p = (char *)&data_addr.su_port; 1641 result = command( 1642 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1643 6, 16, 1644 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1645 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1646 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1647 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1648 2, UC(p[0]), UC(p[1])); 1649 break; 1650 #endif 1651 default: 1652 result = COMPLETE + 1; /* xxx */ 1653 } 1654 if (!connected) 1655 return (1); 1656 skip_port: 1657 1658 if (result == ERROR && sendport == -1) { 1659 sendport = 0; 1660 tmpno = 1; 1661 goto noport; 1662 } 1663 return (result != COMPLETE); 1664 } 1665 if (tmpno) 1666 sendport = 1; 1667 #ifdef IPTOS_THROUGHPUT 1668 if (data_addr.su_family == AF_INET) { 1669 on = IPTOS_THROUGHPUT; 1670 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1671 (void *)&on, sizeof(on)) == -1) 1672 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1673 } 1674 #endif 1675 return (0); 1676 bad: 1677 (void)close(data); 1678 data = -1; 1679 if (tmpno) 1680 sendport = 1; 1681 return (1); 1682 } 1683 1684 FILE * 1685 dataconn(const char *lmode) 1686 { 1687 struct sockinet from; 1688 int s, flags, rv, timeout; 1689 struct timeval endtime, now, td; 1690 struct pollfd pfd[1]; 1691 socklen_t fromlen; 1692 1693 if (passivemode) /* passive data connection */ 1694 return (fdopen(data, lmode)); 1695 1696 /* active mode data connection */ 1697 1698 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1699 goto dataconn_failed; /* get current socket flags */ 1700 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1701 goto dataconn_failed; /* set non-blocking connect */ 1702 1703 /* NOTE: we now must restore socket flags on successful exit */ 1704 1705 /* limit time waiting on listening socket */ 1706 pfd[0].fd = data; 1707 pfd[0].events = POLLIN; 1708 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1709 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1710 /* without -q, default to 60s */ 1711 do { 1712 (void)gettimeofday(&now, NULL); 1713 timersub(&endtime, &now, &td); 1714 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1715 if (timeout < 0) 1716 timeout = 0; 1717 rv = ftp_poll(pfd, 1, timeout); 1718 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1719 if (rv == -1) { 1720 warn("poll waiting before accept"); 1721 goto dataconn_failed; 1722 } 1723 if (rv == 0) { 1724 warn("poll timeout waiting before accept"); 1725 goto dataconn_failed; 1726 } 1727 1728 /* (non-blocking) accept the connection */ 1729 fromlen = myctladdr.su_len; 1730 do { 1731 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1732 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1733 if (s == -1) { 1734 warn("accept"); 1735 goto dataconn_failed; 1736 } 1737 1738 (void)close(data); 1739 data = s; 1740 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1741 goto dataconn_failed; 1742 1743 #ifdef IPTOS_THROUGHPUT 1744 if (from.su_family == AF_INET) { 1745 int tos = IPTOS_THROUGHPUT; 1746 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1747 (void *)&tos, sizeof(tos)) == -1) { 1748 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1749 } 1750 } 1751 #endif 1752 return (fdopen(data, lmode)); 1753 1754 dataconn_failed: 1755 (void)close(data); 1756 data = -1; 1757 return (NULL); 1758 } 1759 1760 void 1761 psabort(int notused) 1762 { 1763 int oerrno = errno; 1764 1765 sigint_raised = 1; 1766 alarmtimer(0); 1767 abrtflag++; 1768 errno = oerrno; 1769 } 1770 1771 void 1772 pswitch(int flag) 1773 { 1774 sigfunc oldintr; 1775 static struct comvars { 1776 int connect; 1777 char name[MAXHOSTNAMELEN]; 1778 struct sockinet mctl; 1779 struct sockinet hctl; 1780 FILE *in; 1781 FILE *out; 1782 int tpe; 1783 int curtpe; 1784 int cpnd; 1785 int sunqe; 1786 int runqe; 1787 int mcse; 1788 int ntflg; 1789 char nti[17]; 1790 char nto[17]; 1791 int mapflg; 1792 char mi[MAXPATHLEN]; 1793 char mo[MAXPATHLEN]; 1794 } proxstruct, tmpstruct; 1795 struct comvars *ip, *op; 1796 1797 abrtflag = 0; 1798 oldintr = xsignal(SIGINT, psabort); 1799 if (flag) { 1800 if (proxy) 1801 return; 1802 ip = &tmpstruct; 1803 op = &proxstruct; 1804 proxy++; 1805 } else { 1806 if (!proxy) 1807 return; 1808 ip = &proxstruct; 1809 op = &tmpstruct; 1810 proxy = 0; 1811 } 1812 ip->connect = connected; 1813 connected = op->connect; 1814 if (hostname) 1815 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1816 else 1817 ip->name[0] = '\0'; 1818 hostname = op->name; 1819 ip->hctl = hisctladdr; 1820 hisctladdr = op->hctl; 1821 ip->mctl = myctladdr; 1822 myctladdr = op->mctl; 1823 ip->in = cin; 1824 cin = op->in; 1825 ip->out = cout; 1826 cout = op->out; 1827 ip->tpe = type; 1828 type = op->tpe; 1829 ip->curtpe = curtype; 1830 curtype = op->curtpe; 1831 ip->cpnd = cpend; 1832 cpend = op->cpnd; 1833 ip->sunqe = sunique; 1834 sunique = op->sunqe; 1835 ip->runqe = runique; 1836 runique = op->runqe; 1837 ip->mcse = mcase; 1838 mcase = op->mcse; 1839 ip->ntflg = ntflag; 1840 ntflag = op->ntflg; 1841 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1842 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1843 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1844 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1845 ip->mapflg = mapflag; 1846 mapflag = op->mapflg; 1847 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1848 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1849 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1850 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1851 (void)xsignal(SIGINT, oldintr); 1852 if (abrtflag) { 1853 abrtflag = 0; 1854 (*oldintr)(SIGINT); 1855 } 1856 } 1857 1858 void 1859 abortpt(int notused) 1860 { 1861 1862 sigint_raised = 1; 1863 alarmtimer(0); 1864 if (fromatty) 1865 write(fileno(ttyout), "\n", 1); 1866 ptabflg++; 1867 mflag = 0; 1868 abrtflag = 0; 1869 siglongjmp(ptabort, 1); 1870 } 1871 1872 void 1873 proxtrans(const char *cmd, const char *local, const char *remote) 1874 { 1875 sigfunc oldintr; 1876 int prox_type, nfnd; 1877 volatile int secndflag; 1878 char *cmd2; 1879 1880 #ifdef __GNUC__ /* to shut up gcc warnings */ 1881 (void)&oldintr; 1882 (void)&cmd2; 1883 #endif 1884 1885 oldintr = NULL; 1886 secndflag = 0; 1887 if (strcmp(cmd, "RETR")) 1888 cmd2 = "RETR"; 1889 else 1890 cmd2 = runique ? "STOU" : "STOR"; 1891 if ((prox_type = type) == 0) { 1892 if (unix_server && unix_proxy) 1893 prox_type = TYPE_I; 1894 else 1895 prox_type = TYPE_A; 1896 } 1897 if (curtype != prox_type) 1898 changetype(prox_type, 1); 1899 if (command("PASV") != COMPLETE) { 1900 fputs("proxy server does not support third party transfers.\n", 1901 ttyout); 1902 return; 1903 } 1904 pswitch(0); 1905 if (!connected) { 1906 fputs("No primary connection.\n", ttyout); 1907 pswitch(1); 1908 code = -1; 1909 return; 1910 } 1911 if (curtype != prox_type) 1912 changetype(prox_type, 1); 1913 if (command("PORT %s", pasv) != COMPLETE) { 1914 pswitch(1); 1915 return; 1916 } 1917 if (sigsetjmp(ptabort, 1)) 1918 goto abort; 1919 oldintr = xsignal(SIGINT, abortpt); 1920 if ((restart_point && 1921 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1922 || (command("%s %s", cmd, remote) != PRELIM)) { 1923 (void)xsignal(SIGINT, oldintr); 1924 pswitch(1); 1925 return; 1926 } 1927 sleep(2); 1928 pswitch(1); 1929 secndflag++; 1930 if ((restart_point && 1931 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1932 || (command("%s %s", cmd2, local) != PRELIM)) 1933 goto abort; 1934 ptflag++; 1935 (void)getreply(0); 1936 pswitch(0); 1937 (void)getreply(0); 1938 (void)xsignal(SIGINT, oldintr); 1939 pswitch(1); 1940 ptflag = 0; 1941 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1942 return; 1943 abort: 1944 if (sigsetjmp(xferabort, 1)) { 1945 (void)xsignal(SIGINT, oldintr); 1946 return; 1947 } 1948 (void)xsignal(SIGINT, abort_squared); 1949 ptflag = 0; 1950 if (strcmp(cmd, "RETR") && !proxy) 1951 pswitch(1); 1952 else if (!strcmp(cmd, "RETR") && proxy) 1953 pswitch(0); 1954 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1955 if (command("%s %s", cmd2, local) != PRELIM) { 1956 pswitch(0); 1957 if (cpend) 1958 abort_remote(NULL); 1959 } 1960 pswitch(1); 1961 if (ptabflg) 1962 code = -1; 1963 (void)xsignal(SIGINT, oldintr); 1964 return; 1965 } 1966 if (cpend) 1967 abort_remote(NULL); 1968 pswitch(!proxy); 1969 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1970 if (command("%s %s", cmd2, local) != PRELIM) { 1971 pswitch(0); 1972 if (cpend) 1973 abort_remote(NULL); 1974 pswitch(1); 1975 if (ptabflg) 1976 code = -1; 1977 (void)xsignal(SIGINT, oldintr); 1978 return; 1979 } 1980 } 1981 if (cpend) 1982 abort_remote(NULL); 1983 pswitch(!proxy); 1984 if (cpend) { 1985 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1986 if (nfnd < 0) 1987 warn("abort"); 1988 if (ptabflg) 1989 code = -1; 1990 lostpeer(0); 1991 } 1992 (void)getreply(0); 1993 (void)getreply(0); 1994 } 1995 if (proxy) 1996 pswitch(0); 1997 pswitch(1); 1998 if (ptabflg) 1999 code = -1; 2000 (void)xsignal(SIGINT, oldintr); 2001 } 2002 2003 void 2004 reset(int argc, char *argv[]) 2005 { 2006 int nfnd = 1; 2007 2008 if (argc == 0 && argv != NULL) { 2009 UPRINTF("usage: %s\n", argv[0]); 2010 code = -1; 2011 return; 2012 } 2013 while (nfnd > 0) { 2014 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2015 warn("reset"); 2016 code = -1; 2017 lostpeer(0); 2018 } else if (nfnd) 2019 (void)getreply(0); 2020 } 2021 } 2022 2023 char * 2024 gunique(const char *local) 2025 { 2026 static char new[MAXPATHLEN]; 2027 char *cp = strrchr(local, '/'); 2028 int d, count=0, len; 2029 char ext = '1'; 2030 2031 if (cp) 2032 *cp = '\0'; 2033 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2034 if (cp) 2035 *cp = '/'; 2036 if (d < 0) { 2037 warn("local: %s", local); 2038 return (NULL); 2039 } 2040 len = strlcpy(new, local, sizeof(new)); 2041 cp = &new[len]; 2042 *cp++ = '.'; 2043 while (!d) { 2044 if (++count == 100) { 2045 fputs("runique: can't find unique file name.\n", 2046 ttyout); 2047 return (NULL); 2048 } 2049 *cp++ = ext; 2050 *cp = '\0'; 2051 if (ext == '9') 2052 ext = '0'; 2053 else 2054 ext++; 2055 if ((d = access(new, F_OK)) < 0) 2056 break; 2057 if (ext != '0') 2058 cp--; 2059 else if (*(cp - 2) == '.') 2060 *(cp - 1) = '1'; 2061 else { 2062 *(cp - 2) = *(cp - 2) + 1; 2063 cp--; 2064 } 2065 } 2066 return (new); 2067 } 2068 2069 /* 2070 * abort_squared -- 2071 * aborts abort_remote(). lostpeer() is called because if the user is 2072 * too impatient to wait or there's another problem then ftp really 2073 * needs to get back to a known state. 2074 */ 2075 void 2076 abort_squared(int dummy) 2077 { 2078 char msgbuf[100]; 2079 size_t len; 2080 2081 sigint_raised = 1; 2082 alarmtimer(0); 2083 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2084 sizeof(msgbuf)); 2085 write(fileno(ttyout), msgbuf, len); 2086 lostpeer(0); 2087 siglongjmp(xferabort, 1); 2088 } 2089 2090 void 2091 abort_remote(FILE *din) 2092 { 2093 char buf[BUFSIZ]; 2094 int nfnd; 2095 2096 if (cout == NULL) { 2097 warnx("Lost control connection for abort."); 2098 if (ptabflg) 2099 code = -1; 2100 lostpeer(0); 2101 return; 2102 } 2103 /* 2104 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2105 * after urgent byte rather than before as is protocol now 2106 */ 2107 buf[0] = IAC; 2108 buf[1] = IP; 2109 buf[2] = IAC; 2110 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2111 warn("abort"); 2112 fprintf(cout, "%cABOR\r\n", DM); 2113 (void)fflush(cout); 2114 if ((nfnd = empty(cin, din, 10)) <= 0) { 2115 if (nfnd < 0) 2116 warn("abort"); 2117 if (ptabflg) 2118 code = -1; 2119 lostpeer(0); 2120 } 2121 if (din && (nfnd & 2)) { 2122 while (read(fileno(din), buf, BUFSIZ) > 0) 2123 continue; 2124 } 2125 if (getreply(0) == ERROR && code == 552) { 2126 /* 552 needed for nic style abort */ 2127 (void)getreply(0); 2128 } 2129 (void)getreply(0); 2130 } 2131 2132 void 2133 ai_unmapped(struct addrinfo *ai) 2134 { 2135 #ifdef INET6 2136 struct sockaddr_in6 *sin6; 2137 struct sockaddr_in sin; 2138 socklen_t len; 2139 2140 if (ai->ai_family != AF_INET6) 2141 return; 2142 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2143 sizeof(sin) > ai->ai_addrlen) 2144 return; 2145 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2146 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2147 return; 2148 2149 memset(&sin, 0, sizeof(sin)); 2150 sin.sin_family = AF_INET; 2151 len = sizeof(struct sockaddr_in); 2152 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2153 sizeof(sin.sin_addr)); 2154 sin.sin_port = sin6->sin6_port; 2155 2156 ai->ai_family = AF_INET; 2157 #if HAVE_SOCKADDR_SA_LEN 2158 sin.sin_len = len; 2159 #endif 2160 memcpy(ai->ai_addr, &sin, len); 2161 ai->ai_addrlen = len; 2162 #endif 2163 } 2164 2165 #ifdef NO_USAGE 2166 void 2167 xusage(void) 2168 { 2169 fputs("Usage error\n", ttyout); 2170 } 2171 #endif 2172