1 /* $NetBSD: ftp.c,v 1.19 2013/05/05 11:17:31 lukem Exp $ */ 2 /* from NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp */ 3 4 /*- 5 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 1985, 1989, 1993, 1994 35 * The Regents of the University of California. All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. Neither the name of the University nor the names of its contributors 46 * may be used to endorse or promote products derived from this software 47 * without specific prior written permission. 48 * 49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59 * SUCH DAMAGE. 60 */ 61 62 /* 63 * Copyright (C) 1997 and 1998 WIDE Project. 64 * All rights reserved. 65 * 66 * Redistribution and use in source and binary forms, with or without 67 * modification, are permitted provided that the following conditions 68 * are met: 69 * 1. Redistributions of source code must retain the above copyright 70 * notice, this list of conditions and the following disclaimer. 71 * 2. Redistributions in binary form must reproduce the above copyright 72 * notice, this list of conditions and the following disclaimer in the 73 * documentation and/or other materials provided with the distribution. 74 * 3. Neither the name of the project nor the names of its contributors 75 * may be used to endorse or promote products derived from this software 76 * without specific prior written permission. 77 * 78 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 79 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 80 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 81 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 82 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 83 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 84 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 85 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 86 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 87 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 88 * SUCH DAMAGE. 89 */ 90 91 #include "tnftp.h" 92 #include <arpa/telnet.h> 93 94 #if 0 /* tnftp */ 95 96 #include <sys/cdefs.h> 97 #ifndef lint 98 #if 0 99 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 100 #else 101 __RCSID(" NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp "); 102 #endif 103 #endif /* not lint */ 104 105 #include <sys/types.h> 106 #include <sys/stat.h> 107 #include <sys/socket.h> 108 #include <sys/time.h> 109 110 #include <netinet/in.h> 111 #include <netinet/in_systm.h> 112 #include <netinet/ip.h> 113 #include <arpa/inet.h> 114 #include <arpa/ftp.h> 115 #include <arpa/telnet.h> 116 117 #include <assert.h> 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 #endif /* tnftp */ 131 132 #include "ftp_var.h" 133 134 volatile sig_atomic_t abrtflag; 135 volatile sig_atomic_t timeoutflag; 136 137 sigjmp_buf ptabort; 138 int ptabflg; 139 int ptflag = 0; 140 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 141 142 static int empty(FILE *, FILE *, int); 143 __dead static void abort_squared(int); 144 145 struct sockinet { 146 union sockunion { 147 struct sockaddr_in su_sin; 148 #ifdef INET6 149 struct sockaddr_in6 su_sin6; 150 #endif 151 } si_su; 152 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 153 int si_len; 154 #endif 155 }; 156 157 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 158 # define su_len si_len 159 #else 160 # define su_len si_su.su_sin.sin_len 161 #endif 162 #define su_family si_su.su_sin.sin_family 163 #define su_port si_su.su_sin.sin_port 164 165 struct sockinet myctladdr, hisctladdr, data_addr; 166 167 char * 168 hookup(const char *host, const char *port) 169 { 170 int s = -1, error; 171 struct addrinfo hints, *res, *res0; 172 static char hostnamebuf[MAXHOSTNAMELEN]; 173 socklen_t len; 174 int on = 1; 175 176 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 177 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 178 memset(&hints, 0, sizeof(hints)); 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, port, &hints, &res0); 184 if (error) { 185 warnx("Can't lookup `%s:%s': %s", host, port, 186 (error == EAI_SYSTEM) ? strerror(errno) 187 : gai_strerror(error)); 188 code = -1; 189 return (0); 190 } 191 192 if (res0->ai_canonname) 193 (void)strlcpy(hostnamebuf, res0->ai_canonname, 194 sizeof(hostnamebuf)); 195 else 196 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 197 hostname = hostnamebuf; 198 199 for (res = res0; res; res = res->ai_next) { 200 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 201 202 ai_unmapped(res); 203 if (getnameinfo(res->ai_addr, res->ai_addrlen, 204 hname, sizeof(hname), sname, sizeof(sname), 205 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 206 strlcpy(hname, "?", sizeof(hname)); 207 strlcpy(sname, "?", sizeof(sname)); 208 } 209 if (verbose && res0->ai_next) { 210 /* if we have multiple possibilities */ 211 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); 212 } 213 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 214 if (s < 0) { 215 warn("Can't create socket for connection to `%s:%s'", 216 hname, sname); 217 continue; 218 } 219 if (ftp_connect(s, res->ai_addr, res->ai_addrlen, 220 verbose || !res->ai_next) < 0) { 221 close(s); 222 s = -1; 223 continue; 224 } 225 226 /* finally we got one */ 227 break; 228 } 229 if (s < 0) { 230 warnx("Can't connect to `%s:%s'", host, port); 231 code = -1; 232 freeaddrinfo(res0); 233 return 0; 234 } 235 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 236 hisctladdr.su_len = res->ai_addrlen; 237 freeaddrinfo(res0); 238 res0 = res = NULL; 239 240 len = hisctladdr.su_len; 241 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 242 warn("Can't determine my address of connection to `%s:%s'", 243 host, port); 244 code = -1; 245 goto bad; 246 } 247 myctladdr.su_len = len; 248 249 #ifdef IPTOS_LOWDELAY 250 if (hisctladdr.su_family == AF_INET) { 251 int tos = IPTOS_LOWDELAY; 252 if (setsockopt(s, IPPROTO_IP, IP_TOS, 253 (void *)&tos, sizeof(tos)) == -1) { 254 DWARN("setsockopt %s (ignored)", 255 "IPTOS_LOWDELAY"); 256 } 257 } 258 #endif 259 cin = fdopen(s, "r"); 260 cout = fdopen(s, "w"); 261 if (cin == NULL || cout == NULL) { 262 warnx("Can't fdopen socket"); 263 if (cin) 264 (void)fclose(cin); 265 if (cout) 266 (void)fclose(cout); 267 code = -1; 268 goto bad; 269 } 270 if (verbose) 271 fprintf(ttyout, "Connected to %s.\n", hostname); 272 if (getreply(0) > 2) { /* read startup message from server */ 273 if (cin) 274 (void)fclose(cin); 275 if (cout) 276 (void)fclose(cout); 277 code = -1; 278 goto bad; 279 } 280 281 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 282 (void *)&on, sizeof(on)) == -1) { 283 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 284 } 285 286 return (hostname); 287 bad: 288 (void)close(s); 289 return (NULL); 290 } 291 292 void 293 cmdabort(int notused) 294 { 295 int oerrno = errno; 296 297 sigint_raised = 1; 298 alarmtimer(0); 299 if (fromatty) 300 write(fileno(ttyout), "\n", 1); 301 abrtflag++; 302 if (ptflag) 303 siglongjmp(ptabort, 1); 304 errno = oerrno; 305 } 306 307 void 308 cmdtimeout(int notused) 309 { 310 int oerrno = errno; 311 312 alarmtimer(0); 313 if (fromatty) 314 write(fileno(ttyout), "\n", 1); 315 timeoutflag++; 316 if (ptflag) 317 siglongjmp(ptabort, 1); 318 errno = oerrno; 319 } 320 321 /*VARARGS*/ 322 int 323 command(const char *fmt, ...) 324 { 325 va_list ap; 326 int r; 327 sigfunc oldsigint; 328 329 #ifndef NO_DEBUG 330 if (ftp_debug) { 331 fputs("---> ", ttyout); 332 va_start(ap, fmt); 333 if (strncmp("PASS ", fmt, 5) == 0) 334 fputs("PASS XXXX", ttyout); 335 else if (strncmp("ACCT ", fmt, 5) == 0) 336 fputs("ACCT XXXX", ttyout); 337 else 338 vfprintf(ttyout, fmt, ap); 339 va_end(ap); 340 putc('\n', ttyout); 341 } 342 #endif 343 if (cout == NULL) { 344 warnx("No control connection for command"); 345 code = -1; 346 return (0); 347 } 348 349 abrtflag = 0; 350 351 oldsigint = xsignal(SIGINT, cmdabort); 352 353 va_start(ap, fmt); 354 vfprintf(cout, fmt, ap); 355 va_end(ap); 356 fputs("\r\n", cout); 357 (void)fflush(cout); 358 cpend = 1; 359 r = getreply(!strcmp(fmt, "QUIT")); 360 if (abrtflag && oldsigint != SIG_IGN) 361 (*oldsigint)(SIGINT); 362 (void)xsignal(SIGINT, oldsigint); 363 return (r); 364 } 365 366 static const char *m421[] = { 367 "remote server timed out. Connection closed", 368 "user interrupt. Connection closed", 369 "remote server has closed connection", 370 }; 371 372 int 373 getreply(int expecteof) 374 { 375 char current_line[BUFSIZ]; /* last line of previous reply */ 376 int c, n, lineno; 377 int dig; 378 int originalcode = 0, continuation = 0; 379 sigfunc oldsigint, oldsigalrm; 380 int pflag = 0; 381 char *cp, *pt = pasv; 382 383 abrtflag = 0; 384 timeoutflag = 0; 385 386 oldsigint = xsignal(SIGINT, cmdabort); 387 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 388 389 for (lineno = 0 ;; lineno++) { 390 dig = n = code = 0; 391 cp = current_line; 392 while (alarmtimer(quit_time ? quit_time : 60), 393 ((c = getc(cin)) != '\n')) { 394 if (c == IAC) { /* handle telnet commands */ 395 switch (c = getc(cin)) { 396 case WILL: 397 case WONT: 398 c = getc(cin); 399 fprintf(cout, "%c%c%c", IAC, DONT, c); 400 (void)fflush(cout); 401 break; 402 case DO: 403 case DONT: 404 c = getc(cin); 405 fprintf(cout, "%c%c%c", IAC, WONT, c); 406 (void)fflush(cout); 407 break; 408 default: 409 break; 410 } 411 continue; 412 } 413 dig++; 414 if (c == EOF) { 415 /* 416 * these will get trashed by pswitch() 417 * in lostpeer() 418 */ 419 int reply_timeoutflag = timeoutflag; 420 int reply_abrtflag = abrtflag; 421 422 alarmtimer(0); 423 if (expecteof && feof(cin)) { 424 (void)xsignal(SIGINT, oldsigint); 425 (void)xsignal(SIGALRM, oldsigalrm); 426 code = 221; 427 return (0); 428 } 429 cpend = 0; 430 lostpeer(0); 431 if (verbose) { 432 size_t midx; 433 if (reply_timeoutflag) 434 midx = 0; 435 else if (reply_abrtflag) 436 midx = 1; 437 else 438 midx = 2; 439 (void)fprintf(ttyout, 440 "421 Service not available, %s.\n", m421[midx]); 441 (void)fflush(ttyout); 442 } 443 code = 421; 444 (void)xsignal(SIGINT, oldsigint); 445 (void)xsignal(SIGALRM, oldsigalrm); 446 return (4); 447 } 448 if (c != '\r' && (verbose > 0 || 449 ((verbose > -1 && n == '5' && dig > 4) && 450 (((!n && c < '5') || (n && n < '5')) 451 || !retry_connect)))) { 452 if (proxflag && 453 (dig == 1 || (dig == 5 && verbose == 0))) 454 fprintf(ttyout, "%s:", hostname); 455 (void)putc(c, ttyout); 456 } 457 if (dig < 4 && isdigit(c)) 458 code = code * 10 + (c - '0'); 459 if (!pflag && (code == 227 || code == 228)) 460 pflag = 1; 461 else if (!pflag && code == 229) 462 pflag = 100; 463 if (dig > 4 && pflag == 1 && isdigit(c)) 464 pflag = 2; 465 if (pflag == 2) { 466 if (c != '\r' && c != ')') { 467 if (pt < &pasv[sizeof(pasv) - 1]) 468 *pt++ = c; 469 } else { 470 *pt = '\0'; 471 pflag = 3; 472 } 473 } 474 if (pflag == 100 && c == '(') 475 pflag = 2; 476 if (dig == 4 && c == '-') { 477 if (continuation) 478 code = 0; 479 continuation++; 480 } 481 if (n == 0) 482 n = c; 483 if (cp < ¤t_line[sizeof(current_line) - 1]) 484 *cp++ = c; 485 } 486 if (verbose > 0 || ((verbose > -1 && n == '5') && 487 (n < '5' || !retry_connect))) { 488 (void)putc(c, ttyout); 489 (void)fflush(ttyout); 490 } 491 if (cp[-1] == '\r') 492 cp[-1] = '\0'; 493 *cp = '\0'; 494 if (lineno == 0) 495 (void)strlcpy(reply_string, current_line, 496 sizeof(reply_string)); 497 if (lineno > 0 && code == 0 && reply_callback != NULL) 498 (*reply_callback)(current_line); 499 if (continuation && code != originalcode) { 500 if (originalcode == 0) 501 originalcode = code; 502 continue; 503 } 504 if (n != '1') 505 cpend = 0; 506 alarmtimer(0); 507 (void)xsignal(SIGINT, oldsigint); 508 (void)xsignal(SIGALRM, oldsigalrm); 509 if (code == 421 || originalcode == 421) 510 lostpeer(0); 511 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 512 (*oldsigint)(SIGINT); 513 if (timeoutflag && oldsigalrm != cmdtimeout && 514 oldsigalrm != SIG_IGN) 515 (*oldsigalrm)(SIGINT); 516 return (n - '0'); 517 } 518 } 519 520 static int 521 empty(FILE *ecin, FILE *din, int sec) 522 { 523 int nr, nfd; 524 struct pollfd pfd[2]; 525 526 nfd = 0; 527 if (ecin) { 528 pfd[nfd].fd = fileno(ecin); 529 pfd[nfd++].events = POLLIN; 530 } 531 532 if (din) { 533 pfd[nfd].fd = fileno(din); 534 pfd[nfd++].events = POLLIN; 535 } 536 537 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 538 return nr; 539 540 nr = 0; 541 nfd = 0; 542 if (ecin) 543 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 544 if (din) 545 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 546 return nr; 547 } 548 549 sigjmp_buf xferabort; 550 551 __dead static void 552 abortxfer(int notused) 553 { 554 char msgbuf[100]; 555 size_t len; 556 557 sigint_raised = 1; 558 alarmtimer(0); 559 mflag = 0; 560 abrtflag = 0; 561 switch (direction[0]) { 562 case 'r': 563 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 564 break; 565 case 's': 566 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 567 break; 568 default: 569 errx(1, "abortxfer: unknown direction `%s'", direction); 570 } 571 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 572 sizeof(msgbuf)); 573 write(fileno(ttyout), msgbuf, len); 574 siglongjmp(xferabort, 1); 575 } 576 577 /* 578 * Read data from infd & write to outfd, using buf/bufsize as the temporary 579 * buffer, dealing with short writes. 580 * If rate_limit != 0, rate-limit the transfer. 581 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 582 * Updates global variables: bytes. 583 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 584 * In the case of error, errno contains the appropriate error code. 585 */ 586 static int 587 copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 588 int rate_limit, int hash_interval) 589 { 590 volatile off_t hashc; 591 ssize_t inc, outc; 592 char *bufp; 593 struct timeval tvthen, tvnow, tvdiff; 594 off_t bufrem, bufchunk; 595 int serr; 596 597 hashc = hash_interval; 598 if (rate_limit) 599 bufchunk = rate_limit; 600 else 601 bufchunk = bufsize; 602 603 while (1) { 604 if (rate_limit) { 605 (void)gettimeofday(&tvthen, NULL); 606 } 607 errno = 0; 608 inc = outc = 0; 609 /* copy bufchunk at a time */ 610 bufrem = bufchunk; 611 while (bufrem > 0) { 612 inc = read(infd, buf, MIN((off_t)bufsize, bufrem)); 613 if (inc <= 0) 614 goto copy_done; 615 bytes += inc; 616 bufrem -= inc; 617 bufp = buf; 618 while (inc > 0) { 619 outc = write(outfd, bufp, inc); 620 if (outc < 0) 621 goto copy_done; 622 inc -= outc; 623 bufp += outc; 624 } 625 if (hash_interval) { 626 while (bytes >= hashc) { 627 (void)putc('#', ttyout); 628 hashc += hash_interval; 629 } 630 (void)fflush(ttyout); 631 } 632 } 633 if (rate_limit) { /* rate limited; wait if necessary */ 634 while (1) { 635 (void)gettimeofday(&tvnow, NULL); 636 timersub(&tvnow, &tvthen, &tvdiff); 637 if (tvdiff.tv_sec > 0) 638 break; 639 usleep(1000000 - tvdiff.tv_usec); 640 } 641 } 642 } 643 644 copy_done: 645 serr = errno; 646 if (hash_interval && bytes > 0) { 647 if (bytes < hash_interval) 648 (void)putc('#', ttyout); 649 (void)putc('\n', ttyout); 650 (void)fflush(ttyout); 651 } 652 errno = serr; 653 if (inc == -1) 654 return 1; 655 if (outc == -1) 656 return 2; 657 658 return 0; 659 } 660 661 void 662 sendrequest(const char *cmd, const char *local, const char *remote, 663 int printnames) 664 { 665 struct stat st; 666 int c; 667 FILE *volatile fin; 668 FILE *volatile dout; 669 int (*volatile closefunc)(FILE *); 670 sigfunc volatile oldintr; 671 sigfunc volatile oldintp; 672 off_t volatile hashbytes; 673 int hash_interval; 674 const char *lmode; 675 static size_t bufsize; 676 static char *buf; 677 int oprogress; 678 679 hashbytes = mark; 680 direction = "sent"; 681 dout = NULL; 682 bytes = 0; 683 filesize = -1; 684 oprogress = progress; 685 if (verbose && printnames) { 686 if (*local != '-') 687 fprintf(ttyout, "local: %s ", local); 688 if (remote) 689 fprintf(ttyout, "remote: %s\n", remote); 690 } 691 if (proxy) { 692 proxtrans(cmd, local, remote); 693 return; 694 } 695 if (curtype != type) 696 changetype(type, 0); 697 closefunc = NULL; 698 oldintr = NULL; 699 oldintp = NULL; 700 lmode = "w"; 701 if (sigsetjmp(xferabort, 1)) { 702 while (cpend) 703 (void)getreply(0); 704 code = -1; 705 goto cleanupsend; 706 } 707 (void)xsignal(SIGQUIT, psummary); 708 oldintr = xsignal(SIGINT, abortxfer); 709 if (strcmp(local, "-") == 0) { 710 fin = stdin; 711 progress = 0; 712 } else if (*local == '|') { 713 oldintp = xsignal(SIGPIPE, SIG_IGN); 714 fin = popen(local + 1, "r"); 715 if (fin == NULL) { 716 warn("Can't execute `%s'", local + 1); 717 code = -1; 718 goto cleanupsend; 719 } 720 progress = 0; 721 closefunc = pclose; 722 } else { 723 fin = fopen(local, "r"); 724 if (fin == NULL) { 725 warn("Can't open `%s'", local); 726 code = -1; 727 goto cleanupsend; 728 } 729 closefunc = fclose; 730 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 731 fprintf(ttyout, "%s: not a plain file.\n", local); 732 code = -1; 733 goto cleanupsend; 734 } 735 filesize = st.st_size; 736 } 737 if (initconn()) { 738 code = -1; 739 goto cleanupsend; 740 } 741 if (sigsetjmp(xferabort, 1)) 742 goto abort; 743 744 if (restart_point && 745 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 746 int rc; 747 748 rc = -1; 749 switch (curtype) { 750 case TYPE_A: 751 rc = fseeko(fin, restart_point, SEEK_SET); 752 break; 753 case TYPE_I: 754 case TYPE_L: 755 rc = lseek(fileno(fin), restart_point, SEEK_SET); 756 break; 757 } 758 if (rc < 0) { 759 warn("Can't seek to restart `%s'", local); 760 goto cleanupsend; 761 } 762 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 763 goto cleanupsend; 764 lmode = "r+"; 765 } 766 if (remote) { 767 if (command("%s %s", cmd, remote) != PRELIM) 768 goto cleanupsend; 769 } else { 770 if (command("%s", cmd) != PRELIM) 771 goto cleanupsend; 772 } 773 dirchange = 1; 774 dout = dataconn(lmode); 775 if (dout == NULL) 776 goto abort; 777 778 assert(sndbuf_size > 0); 779 if ((size_t)sndbuf_size > bufsize) { 780 if (buf) 781 (void)free(buf); 782 bufsize = sndbuf_size; 783 buf = ftp_malloc(bufsize); 784 } 785 786 progressmeter(-1); 787 oldintp = xsignal(SIGPIPE, SIG_IGN); 788 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 789 790 switch (curtype) { 791 792 case TYPE_I: 793 case TYPE_L: 794 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 795 rate_put, hash_interval); 796 if (c == 1) { 797 warn("Reading `%s'", local); 798 } else if (c == 2) { 799 if (errno != EPIPE) 800 warn("Writing to network"); 801 bytes = -1; 802 } 803 break; 804 805 case TYPE_A: 806 while ((c = getc(fin)) != EOF) { 807 if (c == '\n') { 808 while (hash_interval && bytes >= hashbytes) { 809 (void)putc('#', ttyout); 810 (void)fflush(ttyout); 811 hashbytes += mark; 812 } 813 if (ferror(dout)) 814 break; 815 (void)putc('\r', dout); 816 bytes++; 817 } 818 (void)putc(c, dout); 819 bytes++; 820 #if 0 /* this violates RFC 959 */ 821 if (c == '\r') { 822 (void)putc('\0', dout); 823 bytes++; 824 } 825 #endif 826 } 827 if (hash_interval) { 828 if (bytes < hashbytes) 829 (void)putc('#', ttyout); 830 (void)putc('\n', ttyout); 831 } 832 if (ferror(fin)) 833 warn("Reading `%s'", local); 834 if (ferror(dout)) { 835 if (errno != EPIPE) 836 warn("Writing to network"); 837 bytes = -1; 838 } 839 break; 840 } 841 842 progressmeter(1); 843 if (closefunc != NULL) { 844 (*closefunc)(fin); 845 fin = NULL; 846 } 847 (void)fclose(dout); 848 dout = NULL; 849 (void)getreply(0); 850 if (bytes > 0) 851 ptransfer(0); 852 goto cleanupsend; 853 854 abort: 855 (void)xsignal(SIGINT, oldintr); 856 oldintr = NULL; 857 if (!cpend) { 858 code = -1; 859 goto cleanupsend; 860 } 861 if (data >= 0) { 862 (void)close(data); 863 data = -1; 864 } 865 if (dout) { 866 (void)fclose(dout); 867 dout = NULL; 868 } 869 (void)getreply(0); 870 code = -1; 871 if (bytes > 0) 872 ptransfer(0); 873 874 cleanupsend: 875 if (oldintr) 876 (void)xsignal(SIGINT, oldintr); 877 if (oldintp) 878 (void)xsignal(SIGPIPE, oldintp); 879 if (data >= 0) { 880 (void)close(data); 881 data = -1; 882 } 883 if (closefunc != NULL && fin != NULL) 884 (*closefunc)(fin); 885 if (dout) 886 (void)fclose(dout); 887 progress = oprogress; 888 restart_point = 0; 889 bytes = 0; 890 } 891 892 void 893 recvrequest(const char *cmd, const char *volatile local, const char *remote, 894 const char *lmode, int printnames, int ignorespecial) 895 { 896 FILE *volatile fout; 897 FILE *volatile din; 898 int (*volatile closefunc)(FILE *); 899 sigfunc volatile oldintr; 900 sigfunc volatile oldintp; 901 int c, d; 902 int volatile is_retr; 903 int volatile tcrflag; 904 int volatile bare_lfs; 905 static size_t bufsize; 906 static char *buf; 907 off_t volatile hashbytes; 908 int hash_interval; 909 struct stat st; 910 time_t mtime; 911 struct timeval tval[2]; 912 int oprogress; 913 int opreserve; 914 915 fout = NULL; 916 din = NULL; 917 hashbytes = mark; 918 direction = "received"; 919 bytes = 0; 920 bare_lfs = 0; 921 filesize = -1; 922 oprogress = progress; 923 opreserve = preserve; 924 is_retr = (strcmp(cmd, "RETR") == 0); 925 if (is_retr && verbose && printnames) { 926 if (ignorespecial || *local != '-') 927 fprintf(ttyout, "local: %s ", local); 928 if (remote) 929 fprintf(ttyout, "remote: %s\n", remote); 930 } 931 if (proxy && is_retr) { 932 proxtrans(cmd, local, remote); 933 return; 934 } 935 closefunc = NULL; 936 oldintr = NULL; 937 oldintp = NULL; 938 tcrflag = !crflag && is_retr; 939 if (sigsetjmp(xferabort, 1)) { 940 while (cpend) 941 (void)getreply(0); 942 code = -1; 943 goto cleanuprecv; 944 } 945 (void)xsignal(SIGQUIT, psummary); 946 oldintr = xsignal(SIGINT, abortxfer); 947 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 948 if (access(local, W_OK) < 0) { 949 char *dir = strrchr(local, '/'); 950 951 if (errno != ENOENT && errno != EACCES) { 952 warn("Can't access `%s'", local); 953 code = -1; 954 goto cleanuprecv; 955 } 956 if (dir != NULL) 957 *dir = 0; 958 d = access(dir == local ? "/" : 959 dir ? local : ".", W_OK); 960 if (dir != NULL) 961 *dir = '/'; 962 if (d < 0) { 963 warn("Can't access `%s'", local); 964 code = -1; 965 goto cleanuprecv; 966 } 967 if (!runique && errno == EACCES && 968 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 969 warn("Can't chmod `%s'", local); 970 code = -1; 971 goto cleanuprecv; 972 } 973 if (runique && errno == EACCES && 974 (local = gunique(local)) == NULL) { 975 code = -1; 976 goto cleanuprecv; 977 } 978 } 979 else if (runique && (local = gunique(local)) == NULL) { 980 code = -1; 981 goto cleanuprecv; 982 } 983 } 984 if (!is_retr) { 985 if (curtype != TYPE_A) 986 changetype(TYPE_A, 0); 987 } else { 988 if (curtype != type) 989 changetype(type, 0); 990 filesize = remotesize(remote, 0); 991 if (code == 421 || code == -1) 992 goto cleanuprecv; 993 } 994 if (initconn()) { 995 code = -1; 996 goto cleanuprecv; 997 } 998 if (sigsetjmp(xferabort, 1)) 999 goto abort; 1000 if (is_retr && restart_point && 1001 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1002 goto cleanuprecv; 1003 if (! EMPTYSTRING(remote)) { 1004 if (command("%s %s", cmd, remote) != PRELIM) 1005 goto cleanuprecv; 1006 } else { 1007 if (command("%s", cmd) != PRELIM) 1008 goto cleanuprecv; 1009 } 1010 din = dataconn("r"); 1011 if (din == NULL) 1012 goto abort; 1013 if (!ignorespecial && strcmp(local, "-") == 0) { 1014 fout = stdout; 1015 progress = 0; 1016 preserve = 0; 1017 } else if (!ignorespecial && *local == '|') { 1018 oldintp = xsignal(SIGPIPE, SIG_IGN); 1019 fout = popen(local + 1, "w"); 1020 if (fout == NULL) { 1021 warn("Can't execute `%s'", local+1); 1022 goto abort; 1023 } 1024 progress = 0; 1025 preserve = 0; 1026 closefunc = pclose; 1027 } else { 1028 fout = fopen(local, lmode); 1029 if (fout == NULL) { 1030 warn("Can't open `%s'", local); 1031 goto abort; 1032 } 1033 closefunc = fclose; 1034 } 1035 1036 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1037 progress = 0; 1038 preserve = 0; 1039 } 1040 assert(rcvbuf_size > 0); 1041 if ((size_t)rcvbuf_size > bufsize) { 1042 if (buf) 1043 (void)free(buf); 1044 bufsize = rcvbuf_size; 1045 buf = ftp_malloc(bufsize); 1046 } 1047 1048 progressmeter(-1); 1049 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1050 1051 switch (curtype) { 1052 1053 case TYPE_I: 1054 case TYPE_L: 1055 if (is_retr && restart_point && 1056 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1057 warn("Can't seek to restart `%s'", local); 1058 goto cleanuprecv; 1059 } 1060 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1061 rate_get, hash_interval); 1062 if (c == 1) { 1063 if (errno != EPIPE) 1064 warn("Reading from network"); 1065 bytes = -1; 1066 } else if (c == 2) { 1067 warn("Writing `%s'", local); 1068 } 1069 break; 1070 1071 case TYPE_A: 1072 if (is_retr && restart_point) { 1073 int ch; 1074 off_t i; 1075 1076 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1077 goto done; 1078 for (i = 0; i++ < restart_point;) { 1079 if ((ch = getc(fout)) == EOF) 1080 goto done; 1081 if (ch == '\n') 1082 i++; 1083 } 1084 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1085 done: 1086 warn("Can't seek to restart `%s'", local); 1087 goto cleanuprecv; 1088 } 1089 } 1090 while ((c = getc(din)) != EOF) { 1091 if (c == '\n') 1092 bare_lfs++; 1093 while (c == '\r') { 1094 while (hash_interval && bytes >= hashbytes) { 1095 (void)putc('#', ttyout); 1096 (void)fflush(ttyout); 1097 hashbytes += mark; 1098 } 1099 bytes++; 1100 if ((c = getc(din)) != '\n' || tcrflag) { 1101 if (ferror(fout)) 1102 goto break2; 1103 (void)putc('\r', fout); 1104 if (c == '\0') { 1105 bytes++; 1106 goto contin2; 1107 } 1108 if (c == EOF) 1109 goto contin2; 1110 } 1111 } 1112 (void)putc(c, fout); 1113 bytes++; 1114 contin2: ; 1115 } 1116 break2: 1117 if (hash_interval) { 1118 if (bytes < hashbytes) 1119 (void)putc('#', ttyout); 1120 (void)putc('\n', ttyout); 1121 } 1122 if (ferror(din)) { 1123 if (errno != EPIPE) 1124 warn("Reading from network"); 1125 bytes = -1; 1126 } 1127 if (ferror(fout)) 1128 warn("Writing `%s'", local); 1129 break; 1130 } 1131 1132 progressmeter(1); 1133 if (closefunc != NULL) { 1134 (*closefunc)(fout); 1135 fout = NULL; 1136 } 1137 (void)fclose(din); 1138 din = NULL; 1139 (void)getreply(0); 1140 if (bare_lfs) { 1141 fprintf(ttyout, 1142 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1143 bare_lfs); 1144 fputs("File may not have transferred correctly.\n", ttyout); 1145 } 1146 if (bytes >= 0 && is_retr) { 1147 if (bytes > 0) 1148 ptransfer(0); 1149 if (preserve && (closefunc == fclose)) { 1150 mtime = remotemodtime(remote, 0); 1151 if (mtime != -1) { 1152 (void)gettimeofday(&tval[0], NULL); 1153 tval[1].tv_sec = mtime; 1154 tval[1].tv_usec = 0; 1155 if (utimes(local, tval) == -1) { 1156 fprintf(ttyout, 1157 "Can't change modification time on %s to %s", 1158 local, 1159 rfc2822time(localtime(&mtime))); 1160 } 1161 } 1162 } 1163 } 1164 goto cleanuprecv; 1165 1166 abort: 1167 /* 1168 * abort using RFC 959 recommended IP,SYNC sequence 1169 */ 1170 if (! sigsetjmp(xferabort, 1)) { 1171 /* this is the first call */ 1172 (void)xsignal(SIGINT, abort_squared); 1173 if (!cpend) { 1174 code = -1; 1175 goto cleanuprecv; 1176 } 1177 abort_remote(din); 1178 } 1179 code = -1; 1180 if (bytes > 0) 1181 ptransfer(0); 1182 1183 cleanuprecv: 1184 if (oldintr) 1185 (void)xsignal(SIGINT, oldintr); 1186 if (oldintp) 1187 (void)xsignal(SIGPIPE, oldintp); 1188 if (data >= 0) { 1189 (void)close(data); 1190 data = -1; 1191 } 1192 if (closefunc != NULL && fout != NULL) 1193 (*closefunc)(fout); 1194 if (din) 1195 (void)fclose(din); 1196 progress = oprogress; 1197 preserve = opreserve; 1198 bytes = 0; 1199 } 1200 1201 /* 1202 * Need to start a listen on the data channel before we send the command, 1203 * otherwise the server's connect may fail. 1204 */ 1205 int 1206 initconn(void) 1207 { 1208 char *p, *a; 1209 int result, tmpno = 0; 1210 int on = 1; 1211 int error; 1212 unsigned int addr[16], port[2]; 1213 unsigned int af, hal, pal; 1214 socklen_t len; 1215 const char *pasvcmd = NULL; 1216 int overbose; 1217 1218 #ifdef INET6 1219 #ifndef NO_DEBUG 1220 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1221 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1222 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1223 warnx("Use of scoped addresses can be troublesome"); 1224 } 1225 #endif 1226 #endif 1227 1228 reinit: 1229 if (passivemode) { 1230 data_addr = myctladdr; 1231 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1232 if (data < 0) { 1233 warn("Can't create socket for data connection"); 1234 return (1); 1235 } 1236 if ((options & SO_DEBUG) && 1237 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1238 (void *)&on, sizeof(on)) == -1) { 1239 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1240 } 1241 result = COMPLETE + 1; 1242 switch (data_addr.su_family) { 1243 case AF_INET: 1244 if (epsv4 && !epsv4bad) { 1245 pasvcmd = "EPSV"; 1246 overbose = verbose; 1247 if (ftp_debug == 0) 1248 verbose = -1; 1249 result = command("EPSV"); 1250 verbose = overbose; 1251 if (verbose > 0 && 1252 (result == COMPLETE || !connected)) 1253 fprintf(ttyout, "%s\n", reply_string); 1254 if (!connected) 1255 return (1); 1256 /* 1257 * this code is to be friendly with broken 1258 * BSDI ftpd 1259 */ 1260 if (code / 10 == 22 && code != 229) { 1261 fputs( 1262 "wrong server: return code must be 229\n", 1263 ttyout); 1264 result = COMPLETE + 1; 1265 } 1266 if (result != COMPLETE) { 1267 epsv4bad = 1; 1268 DPRINTF("disabling epsv4 for this " 1269 "connection\n"); 1270 } 1271 } 1272 if (result != COMPLETE) { 1273 pasvcmd = "PASV"; 1274 result = command("PASV"); 1275 if (!connected) 1276 return (1); 1277 } 1278 break; 1279 #ifdef INET6 1280 case AF_INET6: 1281 if (epsv6 && !epsv6bad) { 1282 pasvcmd = "EPSV"; 1283 overbose = verbose; 1284 if (ftp_debug == 0) 1285 verbose = -1; 1286 result = command("EPSV"); 1287 verbose = overbose; 1288 if (verbose > 0 && 1289 (result == COMPLETE || !connected)) 1290 fprintf(ttyout, "%s\n", reply_string); 1291 if (!connected) 1292 return (1); 1293 /* 1294 * this code is to be friendly with 1295 * broken BSDI ftpd 1296 */ 1297 if (code / 10 == 22 && code != 229) { 1298 fputs( 1299 "wrong server: return code must be 229\n", 1300 ttyout); 1301 result = COMPLETE + 1; 1302 } 1303 if (result != COMPLETE) { 1304 epsv6bad = 1; 1305 DPRINTF("disabling epsv6 for this " 1306 "connection\n"); 1307 } 1308 } 1309 if (result != COMPLETE) { 1310 pasvcmd = "LPSV"; 1311 result = command("LPSV"); 1312 } 1313 if (!connected) 1314 return (1); 1315 break; 1316 #endif 1317 default: 1318 result = COMPLETE + 1; 1319 break; 1320 } 1321 if (result != COMPLETE) { 1322 if (activefallback) { 1323 (void)close(data); 1324 data = -1; 1325 passivemode = 0; 1326 #if 0 1327 activefallback = 0; 1328 #endif 1329 goto reinit; 1330 } 1331 fputs("Passive mode refused.\n", ttyout); 1332 goto bad; 1333 } 1334 1335 #define pack2(var, off) \ 1336 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1337 #define pack4(var, off) \ 1338 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1339 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1340 #define UC(b) (((int)b)&0xff) 1341 1342 /* 1343 * What we've got at this point is a string of comma separated 1344 * one-byte unsigned integer values, separated by commas. 1345 */ 1346 if (strcmp(pasvcmd, "PASV") == 0) { 1347 if (data_addr.su_family != AF_INET) { 1348 fputs( 1349 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1350 error = 1; 1351 goto bad; 1352 } 1353 if (code / 10 == 22 && code != 227) { 1354 fputs("wrong server: return code must be 227\n", 1355 ttyout); 1356 error = 1; 1357 goto bad; 1358 } 1359 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1360 &addr[0], &addr[1], &addr[2], &addr[3], 1361 &port[0], &port[1]); 1362 if (error != 6) { 1363 fputs( 1364 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1365 error = 1; 1366 goto bad; 1367 } 1368 error = 0; 1369 memset(&data_addr, 0, sizeof(data_addr)); 1370 data_addr.su_family = AF_INET; 1371 data_addr.su_len = sizeof(struct sockaddr_in); 1372 data_addr.si_su.su_sin.sin_addr.s_addr = 1373 htonl(pack4(addr, 0)); 1374 data_addr.su_port = htons(pack2(port, 0)); 1375 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1376 if (code / 10 == 22 && code != 228) { 1377 fputs("wrong server: return code must be 228\n", 1378 ttyout); 1379 error = 1; 1380 goto bad; 1381 } 1382 switch (data_addr.su_family) { 1383 case AF_INET: 1384 error = sscanf(pasv, 1385 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1386 &af, &hal, 1387 &addr[0], &addr[1], &addr[2], &addr[3], 1388 &pal, &port[0], &port[1]); 1389 if (error != 9) { 1390 fputs( 1391 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1392 error = 1; 1393 goto bad; 1394 } 1395 if (af != 4 || hal != 4 || pal != 2) { 1396 fputs( 1397 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1398 error = 1; 1399 goto bad; 1400 } 1401 1402 error = 0; 1403 memset(&data_addr, 0, sizeof(data_addr)); 1404 data_addr.su_family = AF_INET; 1405 data_addr.su_len = sizeof(struct sockaddr_in); 1406 data_addr.si_su.su_sin.sin_addr.s_addr = 1407 htonl(pack4(addr, 0)); 1408 data_addr.su_port = htons(pack2(port, 0)); 1409 break; 1410 #ifdef INET6 1411 case AF_INET6: 1412 error = sscanf(pasv, 1413 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1414 &af, &hal, 1415 &addr[0], &addr[1], &addr[2], &addr[3], 1416 &addr[4], &addr[5], &addr[6], &addr[7], 1417 &addr[8], &addr[9], &addr[10], 1418 &addr[11], &addr[12], &addr[13], 1419 &addr[14], &addr[15], 1420 &pal, &port[0], &port[1]); 1421 if (error != 21) { 1422 fputs( 1423 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1424 error = 1; 1425 goto bad; 1426 } 1427 if (af != 6 || hal != 16 || pal != 2) { 1428 fputs( 1429 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1430 error = 1; 1431 goto bad; 1432 } 1433 1434 error = 0; 1435 memset(&data_addr, 0, sizeof(data_addr)); 1436 data_addr.su_family = AF_INET6; 1437 data_addr.su_len = sizeof(struct sockaddr_in6); 1438 { 1439 size_t i; 1440 for (i = 0; i < sizeof(struct in6_addr); i++) { 1441 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1442 UC(addr[i]); 1443 } 1444 } 1445 data_addr.su_port = htons(pack2(port, 0)); 1446 break; 1447 #endif 1448 default: 1449 error = 1; 1450 } 1451 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1452 char delim[4]; 1453 1454 port[0] = 0; 1455 if (code / 10 == 22 && code != 229) { 1456 fputs("wrong server: return code must be 229\n", 1457 ttyout); 1458 error = 1; 1459 goto bad; 1460 } 1461 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1462 &delim[1], &delim[2], &port[1], 1463 &delim[3]) != 5) { 1464 fputs("parse error!\n", ttyout); 1465 error = 1; 1466 goto bad; 1467 } 1468 if (delim[0] != delim[1] || delim[0] != delim[2] 1469 || delim[0] != delim[3]) { 1470 fputs("parse error!\n", ttyout); 1471 error = 1; 1472 goto bad; 1473 } 1474 data_addr = hisctladdr; 1475 data_addr.su_port = htons(port[1]); 1476 } else 1477 goto bad; 1478 1479 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1480 data_addr.su_len, 1) < 0) { 1481 if (activefallback) { 1482 (void)close(data); 1483 data = -1; 1484 passivemode = 0; 1485 #if 0 1486 activefallback = 0; 1487 #endif 1488 goto reinit; 1489 } 1490 goto bad; 1491 } 1492 #ifdef IPTOS_THROUGHPUT 1493 if (data_addr.su_family == AF_INET) { 1494 on = IPTOS_THROUGHPUT; 1495 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1496 (void *)&on, sizeof(on)) == -1) { 1497 DWARN("setsockopt %s (ignored)", 1498 "IPTOS_THROUGHPUT"); 1499 } 1500 } 1501 #endif 1502 return (0); 1503 } 1504 1505 noport: 1506 data_addr = myctladdr; 1507 if (sendport) 1508 data_addr.su_port = 0; /* let system pick one */ 1509 if (data != -1) 1510 (void)close(data); 1511 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1512 if (data < 0) { 1513 warn("Can't create socket for data connection"); 1514 if (tmpno) 1515 sendport = 1; 1516 return (1); 1517 } 1518 if (!sendport) 1519 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1520 (void *)&on, sizeof(on)) == -1) { 1521 warn("Can't set SO_REUSEADDR on data connection"); 1522 goto bad; 1523 } 1524 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1525 data_addr.su_len) < 0) { 1526 warn("Can't bind for data connection"); 1527 goto bad; 1528 } 1529 if ((options & SO_DEBUG) && 1530 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1531 (void *)&on, sizeof(on)) == -1) { 1532 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1533 } 1534 len = sizeof(data_addr.si_su); 1535 memset((char *)&data_addr, 0, sizeof (data_addr)); 1536 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1537 warn("Can't determine my address of data connection"); 1538 goto bad; 1539 } 1540 data_addr.su_len = len; 1541 if (ftp_listen(data, 1) < 0) 1542 warn("Can't listen to data connection"); 1543 1544 if (sendport) { 1545 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1546 struct sockinet tmp; 1547 1548 switch (data_addr.su_family) { 1549 case AF_INET: 1550 if (!epsv4 || epsv4bad) { 1551 result = COMPLETE + 1; 1552 break; 1553 } 1554 /* FALLTHROUGH */ 1555 #ifdef INET6 1556 case AF_INET6: 1557 if (!epsv6 || epsv6bad) { 1558 result = COMPLETE + 1; 1559 break; 1560 } 1561 #endif 1562 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1563 tmp = data_addr; 1564 #ifdef INET6 1565 if (tmp.su_family == AF_INET6) 1566 tmp.si_su.su_sin6.sin6_scope_id = 0; 1567 #endif 1568 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1569 tmp.su_len, hname, sizeof(hname), sname, 1570 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1571 result = ERROR; 1572 } else { 1573 overbose = verbose; 1574 if (ftp_debug == 0) 1575 verbose = -1; 1576 result = command("EPRT |%u|%s|%s|", af, hname, 1577 sname); 1578 verbose = overbose; 1579 if (verbose > 0 && 1580 (result == COMPLETE || !connected)) 1581 fprintf(ttyout, "%s\n", reply_string); 1582 if (!connected) 1583 return (1); 1584 if (result != COMPLETE) { 1585 epsv4bad = 1; 1586 DPRINTF("disabling epsv4 for this " 1587 "connection\n"); 1588 } 1589 } 1590 break; 1591 default: 1592 result = COMPLETE + 1; 1593 break; 1594 } 1595 if (result == COMPLETE) 1596 goto skip_port; 1597 1598 switch (data_addr.su_family) { 1599 case AF_INET: 1600 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1601 p = (char *)&data_addr.su_port; 1602 result = command("PORT %d,%d,%d,%d,%d,%d", 1603 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1604 UC(p[0]), UC(p[1])); 1605 break; 1606 #ifdef INET6 1607 case AF_INET6: { 1608 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)]; 1609 uint8_t up[sizeof(data_addr.su_port)]; 1610 1611 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr, 1612 sizeof(ua)); 1613 memcpy(up, &data_addr.su_port, sizeof(up)); 1614 1615 result = command( 1616 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1617 6, 16, 1618 ua[0], ua[1], ua[2], ua[3], 1619 ua[4], ua[5], ua[6], ua[7], 1620 ua[8], ua[9], ua[10], ua[11], 1621 ua[12], ua[13], ua[14], ua[15], 1622 2, 1623 up[0], up[1]); 1624 break; 1625 } 1626 #endif 1627 default: 1628 result = COMPLETE + 1; /* xxx */ 1629 } 1630 if (!connected) 1631 return (1); 1632 skip_port: 1633 1634 if (result == ERROR && sendport == -1) { 1635 sendport = 0; 1636 tmpno = 1; 1637 goto noport; 1638 } 1639 return (result != COMPLETE); 1640 } 1641 if (tmpno) 1642 sendport = 1; 1643 #ifdef IPTOS_THROUGHPUT 1644 if (data_addr.su_family == AF_INET) { 1645 on = IPTOS_THROUGHPUT; 1646 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1647 (void *)&on, sizeof(on)) == -1) { 1648 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1649 } 1650 } 1651 #endif 1652 return (0); 1653 bad: 1654 (void)close(data); 1655 data = -1; 1656 if (tmpno) 1657 sendport = 1; 1658 return (1); 1659 } 1660 1661 FILE * 1662 dataconn(const char *lmode) 1663 { 1664 struct sockinet from; 1665 int s, flags, rv, timeout; 1666 struct timeval endtime, now, td; 1667 struct pollfd pfd[1]; 1668 socklen_t fromlen; 1669 1670 if (passivemode) /* passive data connection */ 1671 return (fdopen(data, lmode)); 1672 1673 /* active mode data connection */ 1674 1675 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1676 goto dataconn_failed; /* get current socket flags */ 1677 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1678 goto dataconn_failed; /* set non-blocking connect */ 1679 1680 /* NOTE: we now must restore socket flags on successful exit */ 1681 1682 /* limit time waiting on listening socket */ 1683 pfd[0].fd = data; 1684 pfd[0].events = POLLIN; 1685 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1686 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1687 /* without -q, default to 60s */ 1688 do { 1689 (void)gettimeofday(&now, NULL); 1690 timersub(&endtime, &now, &td); 1691 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1692 if (timeout < 0) 1693 timeout = 0; 1694 rv = ftp_poll(pfd, 1, timeout); 1695 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1696 if (rv == -1) { 1697 warn("Can't poll waiting before accept"); 1698 goto dataconn_failed; 1699 } 1700 if (rv == 0) { 1701 warnx("Poll timeout waiting before accept"); 1702 goto dataconn_failed; 1703 } 1704 1705 /* (non-blocking) accept the connection */ 1706 fromlen = myctladdr.su_len; 1707 do { 1708 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1709 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1710 if (s == -1) { 1711 warn("Can't accept data connection"); 1712 goto dataconn_failed; 1713 } 1714 1715 (void)close(data); 1716 data = s; 1717 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1718 goto dataconn_failed; 1719 1720 #ifdef IPTOS_THROUGHPUT 1721 if (from.su_family == AF_INET) { 1722 int tos = IPTOS_THROUGHPUT; 1723 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1724 (void *)&tos, sizeof(tos)) == -1) { 1725 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1726 } 1727 } 1728 #endif 1729 return (fdopen(data, lmode)); 1730 1731 dataconn_failed: 1732 (void)close(data); 1733 data = -1; 1734 return (NULL); 1735 } 1736 1737 void 1738 psabort(int notused) 1739 { 1740 int oerrno = errno; 1741 1742 sigint_raised = 1; 1743 alarmtimer(0); 1744 abrtflag++; 1745 errno = oerrno; 1746 } 1747 1748 void 1749 pswitch(int flag) 1750 { 1751 sigfunc oldintr; 1752 static struct comvars { 1753 int connect; 1754 char name[MAXHOSTNAMELEN]; 1755 struct sockinet mctl; 1756 struct sockinet hctl; 1757 FILE *in; 1758 FILE *out; 1759 int tpe; 1760 int curtpe; 1761 int cpnd; 1762 int sunqe; 1763 int runqe; 1764 int mcse; 1765 int ntflg; 1766 char nti[17]; 1767 char nto[17]; 1768 int mapflg; 1769 char mi[MAXPATHLEN]; 1770 char mo[MAXPATHLEN]; 1771 } proxstruct, tmpstruct; 1772 struct comvars *ip, *op; 1773 1774 abrtflag = 0; 1775 oldintr = xsignal(SIGINT, psabort); 1776 if (flag) { 1777 if (proxy) 1778 return; 1779 ip = &tmpstruct; 1780 op = &proxstruct; 1781 proxy++; 1782 } else { 1783 if (!proxy) 1784 return; 1785 ip = &proxstruct; 1786 op = &tmpstruct; 1787 proxy = 0; 1788 } 1789 ip->connect = connected; 1790 connected = op->connect; 1791 if (hostname) 1792 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1793 else 1794 ip->name[0] = '\0'; 1795 hostname = op->name; 1796 ip->hctl = hisctladdr; 1797 hisctladdr = op->hctl; 1798 ip->mctl = myctladdr; 1799 myctladdr = op->mctl; 1800 ip->in = cin; 1801 cin = op->in; 1802 ip->out = cout; 1803 cout = op->out; 1804 ip->tpe = type; 1805 type = op->tpe; 1806 ip->curtpe = curtype; 1807 curtype = op->curtpe; 1808 ip->cpnd = cpend; 1809 cpend = op->cpnd; 1810 ip->sunqe = sunique; 1811 sunique = op->sunqe; 1812 ip->runqe = runique; 1813 runique = op->runqe; 1814 ip->mcse = mcase; 1815 mcase = op->mcse; 1816 ip->ntflg = ntflag; 1817 ntflag = op->ntflg; 1818 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1819 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1820 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1821 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1822 ip->mapflg = mapflag; 1823 mapflag = op->mapflg; 1824 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1825 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1826 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1827 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1828 (void)xsignal(SIGINT, oldintr); 1829 if (abrtflag) { 1830 abrtflag = 0; 1831 (*oldintr)(SIGINT); 1832 } 1833 } 1834 1835 __dead static void 1836 abortpt(int notused) 1837 { 1838 1839 sigint_raised = 1; 1840 alarmtimer(0); 1841 if (fromatty) 1842 write(fileno(ttyout), "\n", 1); 1843 ptabflg++; 1844 mflag = 0; 1845 abrtflag = 0; 1846 siglongjmp(ptabort, 1); 1847 } 1848 1849 void 1850 proxtrans(const char *cmd, const char *local, const char *remote) 1851 { 1852 sigfunc volatile oldintr; 1853 int prox_type, nfnd; 1854 int volatile secndflag; 1855 const char *volatile cmd2; 1856 1857 oldintr = NULL; 1858 secndflag = 0; 1859 if (strcmp(cmd, "RETR")) 1860 cmd2 = "RETR"; 1861 else 1862 cmd2 = runique ? "STOU" : "STOR"; 1863 if ((prox_type = type) == 0) { 1864 if (unix_server && unix_proxy) 1865 prox_type = TYPE_I; 1866 else 1867 prox_type = TYPE_A; 1868 } 1869 if (curtype != prox_type) 1870 changetype(prox_type, 1); 1871 if (command("PASV") != COMPLETE) { 1872 fputs("proxy server does not support third party transfers.\n", 1873 ttyout); 1874 return; 1875 } 1876 pswitch(0); 1877 if (!connected) { 1878 fputs("No primary connection.\n", ttyout); 1879 pswitch(1); 1880 code = -1; 1881 return; 1882 } 1883 if (curtype != prox_type) 1884 changetype(prox_type, 1); 1885 if (command("PORT %s", pasv) != COMPLETE) { 1886 pswitch(1); 1887 return; 1888 } 1889 if (sigsetjmp(ptabort, 1)) 1890 goto abort; 1891 oldintr = xsignal(SIGINT, abortpt); 1892 if ((restart_point && 1893 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1894 || (command("%s %s", cmd, remote) != PRELIM)) { 1895 (void)xsignal(SIGINT, oldintr); 1896 pswitch(1); 1897 return; 1898 } 1899 sleep(2); 1900 pswitch(1); 1901 secndflag++; 1902 if ((restart_point && 1903 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1904 || (command("%s %s", cmd2, local) != PRELIM)) 1905 goto abort; 1906 ptflag++; 1907 (void)getreply(0); 1908 pswitch(0); 1909 (void)getreply(0); 1910 (void)xsignal(SIGINT, oldintr); 1911 pswitch(1); 1912 ptflag = 0; 1913 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1914 return; 1915 abort: 1916 if (sigsetjmp(xferabort, 1)) { 1917 (void)xsignal(SIGINT, oldintr); 1918 return; 1919 } 1920 (void)xsignal(SIGINT, abort_squared); 1921 ptflag = 0; 1922 if (strcmp(cmd, "RETR") && !proxy) 1923 pswitch(1); 1924 else if (!strcmp(cmd, "RETR") && proxy) 1925 pswitch(0); 1926 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1927 if (command("%s %s", cmd2, local) != PRELIM) { 1928 pswitch(0); 1929 if (cpend) 1930 abort_remote(NULL); 1931 } 1932 pswitch(1); 1933 if (ptabflg) 1934 code = -1; 1935 (void)xsignal(SIGINT, oldintr); 1936 return; 1937 } 1938 if (cpend) 1939 abort_remote(NULL); 1940 pswitch(!proxy); 1941 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1942 if (command("%s %s", cmd2, local) != PRELIM) { 1943 pswitch(0); 1944 if (cpend) 1945 abort_remote(NULL); 1946 pswitch(1); 1947 if (ptabflg) 1948 code = -1; 1949 (void)xsignal(SIGINT, oldintr); 1950 return; 1951 } 1952 } 1953 if (cpend) 1954 abort_remote(NULL); 1955 pswitch(!proxy); 1956 if (cpend) { 1957 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1958 if (nfnd < 0) 1959 warn("Error aborting proxy command"); 1960 if (ptabflg) 1961 code = -1; 1962 lostpeer(0); 1963 } 1964 (void)getreply(0); 1965 (void)getreply(0); 1966 } 1967 if (proxy) 1968 pswitch(0); 1969 pswitch(1); 1970 if (ptabflg) 1971 code = -1; 1972 (void)xsignal(SIGINT, oldintr); 1973 } 1974 1975 void 1976 reset(int argc, char *argv[]) 1977 { 1978 int nfnd = 1; 1979 1980 if (argc == 0 && argv != NULL) { 1981 UPRINTF("usage: %s\n", argv[0]); 1982 code = -1; 1983 return; 1984 } 1985 while (nfnd > 0) { 1986 if ((nfnd = empty(cin, NULL, 0)) < 0) { 1987 warn("Error resetting connection"); 1988 code = -1; 1989 lostpeer(0); 1990 } else if (nfnd) 1991 (void)getreply(0); 1992 } 1993 } 1994 1995 char * 1996 gunique(const char *local) 1997 { 1998 static char new[MAXPATHLEN]; 1999 char *cp = strrchr(local, '/'); 2000 int d, count=0, len; 2001 char ext = '1'; 2002 2003 if (cp) 2004 *cp = '\0'; 2005 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2006 if (cp) 2007 *cp = '/'; 2008 if (d < 0) { 2009 warn("Can't access `%s'", local); 2010 return (NULL); 2011 } 2012 len = strlcpy(new, local, sizeof(new)); 2013 cp = &new[len]; 2014 *cp++ = '.'; 2015 while (!d) { 2016 if (++count == 100) { 2017 fputs("runique: can't find unique file name.\n", 2018 ttyout); 2019 return (NULL); 2020 } 2021 *cp++ = ext; 2022 *cp = '\0'; 2023 if (ext == '9') 2024 ext = '0'; 2025 else 2026 ext++; 2027 if ((d = access(new, F_OK)) < 0) 2028 break; 2029 if (ext != '0') 2030 cp--; 2031 else if (*(cp - 2) == '.') 2032 *(cp - 1) = '1'; 2033 else { 2034 *(cp - 2) = *(cp - 2) + 1; 2035 cp--; 2036 } 2037 } 2038 return (new); 2039 } 2040 2041 /* 2042 * abort_squared -- 2043 * aborts abort_remote(). lostpeer() is called because if the user is 2044 * too impatient to wait or there's another problem then ftp really 2045 * needs to get back to a known state. 2046 */ 2047 static void 2048 abort_squared(int dummy) 2049 { 2050 char msgbuf[100]; 2051 size_t len; 2052 2053 sigint_raised = 1; 2054 alarmtimer(0); 2055 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2056 sizeof(msgbuf)); 2057 write(fileno(ttyout), msgbuf, len); 2058 lostpeer(0); 2059 siglongjmp(xferabort, 1); 2060 } 2061 2062 void 2063 abort_remote(FILE *din) 2064 { 2065 char buf[BUFSIZ]; 2066 int nfnd; 2067 2068 if (cout == NULL) { 2069 warnx("Lost control connection for abort"); 2070 if (ptabflg) 2071 code = -1; 2072 lostpeer(0); 2073 return; 2074 } 2075 /* 2076 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2077 * after urgent byte rather than before as is protocol now 2078 */ 2079 buf[0] = IAC; 2080 buf[1] = IP; 2081 buf[2] = IAC; 2082 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2083 warn("Can't send abort message"); 2084 fprintf(cout, "%cABOR\r\n", DM); 2085 (void)fflush(cout); 2086 if ((nfnd = empty(cin, din, 10)) <= 0) { 2087 if (nfnd < 0) 2088 warn("Can't send abort message"); 2089 if (ptabflg) 2090 code = -1; 2091 lostpeer(0); 2092 } 2093 if (din && (nfnd & 2)) { 2094 while (read(fileno(din), buf, BUFSIZ) > 0) 2095 continue; 2096 } 2097 if (getreply(0) == ERROR && code == 552) { 2098 /* 552 needed for nic style abort */ 2099 (void)getreply(0); 2100 } 2101 (void)getreply(0); 2102 } 2103 2104 /* 2105 * Ensure that ai->ai_addr is NOT an IPv4 mapped address. 2106 * IPv4 mapped address complicates too many things in FTP 2107 * protocol handling, as FTP protocol is defined differently 2108 * between IPv4 and IPv6. 2109 * 2110 * This may not be the best way to handle this situation, 2111 * since the semantics of IPv4 mapped address is defined in 2112 * the kernel. There are configurations where we should use 2113 * IPv4 mapped address as native IPv6 address, not as 2114 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 2115 * 2116 * More complete solution would be to have an additional 2117 * getsockopt to grab "real" peername/sockname. "real" 2118 * peername/sockname will be AF_INET if IPv4 mapped address 2119 * is used to embed IPv4 address, and will be AF_INET6 if 2120 * we use it as native. What a mess! 2121 */ 2122 void 2123 ai_unmapped(struct addrinfo *ai) 2124 { 2125 #ifdef INET6 2126 struct sockaddr_in6 *sin6; 2127 struct sockaddr_in sin; 2128 socklen_t len; 2129 2130 if (ai->ai_family != AF_INET6) 2131 return; 2132 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2133 sizeof(sin) > ai->ai_addrlen) 2134 return; 2135 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2136 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2137 return; 2138 2139 memset(&sin, 0, sizeof(sin)); 2140 sin.sin_family = AF_INET; 2141 len = sizeof(struct sockaddr_in); 2142 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2143 sizeof(sin.sin_addr)); 2144 sin.sin_port = sin6->sin6_port; 2145 2146 ai->ai_family = AF_INET; 2147 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 2148 sin.sin_len = len; 2149 #endif 2150 memcpy(ai->ai_addr, &sin, len); 2151 ai->ai_addrlen = len; 2152 #endif 2153 } 2154 2155 #ifdef NO_USAGE 2156 void 2157 xusage(void) 2158 { 2159 fputs("Usage error\n", ttyout); 2160 } 2161 #endif 2162