1/* $NetBSD: ftp.c,v 1.18 2009/05/20 12:53:47 lukem Exp $ */ 2/* from NetBSD: ftp.c,v 1.159 2009/04/15 03:42:33 jld 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 99static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 100#else 101__RCSID(" NetBSD: ftp.c,v 1.159 2009/04/15 03:42:33 jld 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 <ctype.h> 118#include <err.h> 119#include <errno.h> 120#include <fcntl.h> 121#include <netdb.h> 122#include <stdio.h> 123#include <stdlib.h> 124#include <string.h> 125#include <time.h> 126#include <unistd.h> 127#include <stdarg.h> 128 129#endif /* tnftp */ 130 131#include "ftp_var.h" 132 133volatile sig_atomic_t abrtflag; 134volatile sig_atomic_t timeoutflag; 135 136sigjmp_buf ptabort; 137int ptabflg; 138int ptflag = 0; 139char pasv[BUFSIZ]; /* passive port for proxy data connection */ 140 141static int empty(FILE *, FILE *, int); 142 143struct sockinet { 144 union sockunion { 145 struct sockaddr_in su_sin; 146#ifdef INET6 147 struct sockaddr_in6 su_sin6; 148#endif 149 } si_su; 150#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 151 int si_len; 152#endif 153}; 154 155#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 156# define su_len si_len 157#else 158# define su_len si_su.su_sin.sin_len 159#endif 160#define su_family si_su.su_sin.sin_family 161#define su_port si_su.su_sin.sin_port 162 163struct sockinet myctladdr, hisctladdr, data_addr; 164 165char * 166hookup(const char *host, const char *port) 167{ 168 int s = -1, error; 169 struct addrinfo hints, *res, *res0; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 socklen_t len; 172 int on = 1; 173 174 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 175 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 176 memset(&hints, 0, sizeof(hints)); 177 hints.ai_flags = AI_CANONNAME; 178 hints.ai_family = family; 179 hints.ai_socktype = SOCK_STREAM; 180 hints.ai_protocol = 0; 181 error = getaddrinfo(host, port, &hints, &res0); 182 if (error) { 183 warnx("Can't lookup `%s:%s': %s", host, port, 184 (error == EAI_SYSTEM) ? strerror(errno) 185 : 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 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 199 200 ai_unmapped(res); 201 if (getnameinfo(res->ai_addr, res->ai_addrlen, 202 hname, sizeof(hname), sname, sizeof(sname), 203 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 204 strlcpy(hname, "?", sizeof(hname)); 205 strlcpy(sname, "?", sizeof(sname)); 206 } 207 if (verbose && res0->ai_next) { 208 /* if we have multiple possibilities */ 209 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); 210 } 211 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 212 if (s < 0) { 213 warn("Can't create socket for connection to `%s:%s'", 214 hname, sname); 215 continue; 216 } 217 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 218 close(s); 219 s = -1; 220 continue; 221 } 222 223 /* finally we got one */ 224 break; 225 } 226 if (s < 0) { 227 warnx("Can't connect to `%s:%s'", host, port); 228 code = -1; 229 freeaddrinfo(res0); 230 return 0; 231 } 232 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 233 hisctladdr.su_len = res->ai_addrlen; 234 freeaddrinfo(res0); 235 res0 = res = NULL; 236 237 len = hisctladdr.su_len; 238 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 239 warn("Can't determine my address of connection to `%s:%s'", 240 host, port); 241 code = -1; 242 goto bad; 243 } 244 myctladdr.su_len = len; 245 246#ifdef IPTOS_LOWDELAY 247 if (hisctladdr.su_family == AF_INET) { 248 int tos = IPTOS_LOWDELAY; 249 if (setsockopt(s, IPPROTO_IP, IP_TOS, 250 (void *)&tos, sizeof(tos)) == -1) { 251 DWARN("setsockopt %s (ignored)", 252 "IPTOS_LOWDELAY"); 253 } 254 } 255#endif 256 cin = fdopen(s, "r"); 257 cout = fdopen(s, "w"); 258 if (cin == NULL || cout == NULL) { 259 warnx("Can't fdopen socket"); 260 if (cin) 261 (void)fclose(cin); 262 if (cout) 263 (void)fclose(cout); 264 code = -1; 265 goto bad; 266 } 267 if (verbose) 268 fprintf(ttyout, "Connected to %s.\n", hostname); 269 if (getreply(0) > 2) { /* read startup message from server */ 270 if (cin) 271 (void)fclose(cin); 272 if (cout) 273 (void)fclose(cout); 274 code = -1; 275 goto bad; 276 } 277 278 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 279 (void *)&on, sizeof(on)) == -1) { 280 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 281 } 282 283 return (hostname); 284 bad: 285 (void)close(s); 286 return (NULL); 287} 288 289void 290cmdabort(int notused) 291{ 292 int oerrno = errno; 293 294 sigint_raised = 1; 295 alarmtimer(0); 296 if (fromatty) 297 write(fileno(ttyout), "\n", 1); 298 abrtflag++; 299 if (ptflag) 300 siglongjmp(ptabort, 1); 301 errno = oerrno; 302} 303 304void 305cmdtimeout(int notused) 306{ 307 int oerrno = errno; 308 309 alarmtimer(0); 310 if (fromatty) 311 write(fileno(ttyout), "\n", 1); 312 timeoutflag++; 313 if (ptflag) 314 siglongjmp(ptabort, 1); 315 errno = oerrno; 316} 317 318/*VARARGS*/ 319int 320command(const char *fmt, ...) 321{ 322 va_list ap; 323 int r; 324 sigfunc oldsigint; 325 326#ifndef NO_DEBUG 327 if (ftp_debug) { 328 fputs("---> ", ttyout); 329 va_start(ap, fmt); 330 if (strncmp("PASS ", fmt, 5) == 0) 331 fputs("PASS XXXX", ttyout); 332 else if (strncmp("ACCT ", fmt, 5) == 0) 333 fputs("ACCT XXXX", ttyout); 334 else 335 vfprintf(ttyout, fmt, ap); 336 va_end(ap); 337 putc('\n', ttyout); 338 } 339#endif 340 if (cout == NULL) { 341 warnx("No control connection for command"); 342 code = -1; 343 return (0); 344 } 345 346 abrtflag = 0; 347 348 oldsigint = xsignal(SIGINT, cmdabort); 349 350 va_start(ap, fmt); 351 vfprintf(cout, fmt, ap); 352 va_end(ap); 353 fputs("\r\n", cout); 354 (void)fflush(cout); 355 cpend = 1; 356 r = getreply(!strcmp(fmt, "QUIT")); 357 if (abrtflag && oldsigint != SIG_IGN) 358 (*oldsigint)(SIGINT); 359 (void)xsignal(SIGINT, oldsigint); 360 return (r); 361} 362 363static const char *m421[] = { 364 "remote server timed out. Connection closed", 365 "user interrupt. Connection closed", 366 "remote server has closed connection", 367}; 368 369int 370getreply(int expecteof) 371{ 372 char current_line[BUFSIZ]; /* last line of previous reply */ 373 int c, n, lineno; 374 int dig; 375 int originalcode = 0, continuation = 0; 376 sigfunc oldsigint, oldsigalrm; 377 int pflag = 0; 378 char *cp, *pt = pasv; 379 380 abrtflag = 0; 381 timeoutflag = 0; 382 383 oldsigint = xsignal(SIGINT, cmdabort); 384 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 385 386 for (lineno = 0 ;; lineno++) { 387 dig = n = code = 0; 388 cp = current_line; 389 while (alarmtimer(quit_time ? quit_time : 60), 390 ((c = getc(cin)) != '\n')) { 391 if (c == IAC) { /* handle telnet commands */ 392 switch (c = getc(cin)) { 393 case WILL: 394 case WONT: 395 c = getc(cin); 396 fprintf(cout, "%c%c%c", IAC, DONT, c); 397 (void)fflush(cout); 398 break; 399 case DO: 400 case DONT: 401 c = getc(cin); 402 fprintf(cout, "%c%c%c", IAC, WONT, c); 403 (void)fflush(cout); 404 break; 405 default: 406 break; 407 } 408 continue; 409 } 410 dig++; 411 if (c == EOF) { 412 /* 413 * these will get trashed by pswitch() 414 * in lostpeer() 415 */ 416 int reply_timeoutflag = timeoutflag; 417 int reply_abrtflag = abrtflag; 418 419 alarmtimer(0); 420 if (expecteof && feof(cin)) { 421 (void)xsignal(SIGINT, oldsigint); 422 (void)xsignal(SIGALRM, oldsigalrm); 423 code = 221; 424 return (0); 425 } 426 cpend = 0; 427 lostpeer(0); 428 if (verbose) { 429 size_t midx; 430 if (reply_timeoutflag) 431 midx = 0; 432 else if (reply_abrtflag) 433 midx = 1; 434 else 435 midx = 2; 436 (void)fprintf(ttyout, 437 "421 Service not available, %s.\n", m421[midx]); 438 (void)fflush(ttyout); 439 } 440 code = 421; 441 (void)xsignal(SIGINT, oldsigint); 442 (void)xsignal(SIGALRM, oldsigalrm); 443 return (4); 444 } 445 if (c != '\r' && (verbose > 0 || 446 ((verbose > -1 && n == '5' && dig > 4) && 447 (((!n && c < '5') || (n && n < '5')) 448 || !retry_connect)))) { 449 if (proxflag && 450 (dig == 1 || (dig == 5 && verbose == 0))) 451 fprintf(ttyout, "%s:", hostname); 452 (void)putc(c, ttyout); 453 } 454 if (dig < 4 && isdigit(c)) 455 code = code * 10 + (c - '0'); 456 if (!pflag && (code == 227 || code == 228)) 457 pflag = 1; 458 else if (!pflag && code == 229) 459 pflag = 100; 460 if (dig > 4 && pflag == 1 && isdigit(c)) 461 pflag = 2; 462 if (pflag == 2) { 463 if (c != '\r' && c != ')') { 464 if (pt < &pasv[sizeof(pasv) - 1]) 465 *pt++ = c; 466 } else { 467 *pt = '\0'; 468 pflag = 3; 469 } 470 } 471 if (pflag == 100 && c == '(') 472 pflag = 2; 473 if (dig == 4 && c == '-') { 474 if (continuation) 475 code = 0; 476 continuation++; 477 } 478 if (n == 0) 479 n = c; 480 if (cp < ¤t_line[sizeof(current_line) - 1]) 481 *cp++ = c; 482 } 483 if (verbose > 0 || ((verbose > -1 && n == '5') && 484 (n < '5' || !retry_connect))) { 485 (void)putc(c, ttyout); 486 (void)fflush(ttyout); 487 } 488 if (cp[-1] == '\r') 489 cp[-1] = '\0'; 490 *cp = '\0'; 491 if (lineno == 0) 492 (void)strlcpy(reply_string, current_line, 493 sizeof(reply_string)); 494 if (lineno > 0 && code == 0 && reply_callback != NULL) 495 (*reply_callback)(current_line); 496 if (continuation && code != originalcode) { 497 if (originalcode == 0) 498 originalcode = code; 499 continue; 500 } 501 if (n != '1') 502 cpend = 0; 503 alarmtimer(0); 504 (void)xsignal(SIGINT, oldsigint); 505 (void)xsignal(SIGALRM, oldsigalrm); 506 if (code == 421 || originalcode == 421) 507 lostpeer(0); 508 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 509 (*oldsigint)(SIGINT); 510 if (timeoutflag && oldsigalrm != cmdtimeout && 511 oldsigalrm != SIG_IGN) 512 (*oldsigalrm)(SIGINT); 513 return (n - '0'); 514 } 515} 516 517static int 518empty(FILE *ecin, FILE *din, int sec) 519{ 520 int nr, nfd; 521 struct pollfd pfd[2]; 522 523 nfd = 0; 524 if (ecin) { 525 pfd[nfd].fd = fileno(ecin); 526 pfd[nfd++].events = POLLIN; 527 } 528 529 if (din) { 530 pfd[nfd].fd = fileno(din); 531 pfd[nfd++].events = POLLIN; 532 } 533 534 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 535 return nr; 536 537 nr = 0; 538 nfd = 0; 539 if (ecin) 540 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 541 if (din) 542 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 543 return nr; 544} 545 546sigjmp_buf xferabort; 547 548void 549abortxfer(int notused) 550{ 551 char msgbuf[100]; 552 size_t len; 553 554 sigint_raised = 1; 555 alarmtimer(0); 556 mflag = 0; 557 abrtflag = 0; 558 switch (direction[0]) { 559 case 'r': 560 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 561 break; 562 case 's': 563 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 564 break; 565 default: 566 errx(1, "abortxfer: unknown direction `%s'", direction); 567 } 568 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 569 sizeof(msgbuf)); 570 write(fileno(ttyout), msgbuf, len); 571 siglongjmp(xferabort, 1); 572} 573 574/* 575 * Read data from infd & write to outfd, using buf/bufsize as the temporary 576 * buffer, dealing with short writes. 577 * If rate_limit != 0, rate-limit the transfer. 578 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 579 * Updates global variables: bytes. 580 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 581 * In the case of error, errno contains the appropriate error code. 582 */ 583static int 584copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 585 int rate_limit, int hash_interval) 586{ 587 volatile off_t hashc; 588 ssize_t inc, outc; 589 char *bufp; 590 struct timeval tvthen, tvnow, tvdiff; 591 off_t bufrem, bufchunk; 592 int serr; 593 594 hashc = hash_interval; 595 if (rate_limit) 596 bufchunk = rate_limit; 597 else 598 bufchunk = bufsize; 599 600 while (1) { 601 if (rate_limit) { 602 (void)gettimeofday(&tvthen, NULL); 603 } 604 errno = 0; 605 inc = outc = 0; 606 /* copy bufchunk at a time */ 607 bufrem = bufchunk; 608 while (bufrem > 0) { 609 inc = read(infd, buf, MIN((off_t)bufsize, bufrem)); 610 if (inc <= 0) 611 goto copy_done; 612 bytes += inc; 613 bufrem -= inc; 614 bufp = buf; 615 while (inc > 0) { 616 outc = write(outfd, bufp, inc); 617 if (outc < 0) 618 goto copy_done; 619 inc -= outc; 620 bufp += outc; 621 } 622 if (hash_interval) { 623 while (bytes >= hashc) { 624 (void)putc('#', ttyout); 625 hashc += hash_interval; 626 } 627 (void)fflush(ttyout); 628 } 629 } 630 if (rate_limit) { /* rate limited; wait if necessary */ 631 while (1) { 632 (void)gettimeofday(&tvnow, NULL); 633 timersub(&tvnow, &tvthen, &tvdiff); 634 if (tvdiff.tv_sec > 0) 635 break; 636 usleep(1000000 - tvdiff.tv_usec); 637 } 638 } 639 } 640 641 copy_done: 642 serr = errno; 643 if (hash_interval && bytes > 0) { 644 if (bytes < hash_interval) 645 (void)putc('#', ttyout); 646 (void)putc('\n', ttyout); 647 (void)fflush(ttyout); 648 } 649 errno = serr; 650 if (inc == -1) 651 return 1; 652 if (outc == -1) 653 return 2; 654 655 return 0; 656} 657 658void 659sendrequest(const char *cmd, const char *local, const char *remote, 660 int printnames) 661{ 662 struct stat st; 663 int c; 664 FILE *volatile fin; 665 FILE *volatile dout; 666 int (*volatile closefunc)(FILE *); 667 sigfunc volatile oldintr; 668 sigfunc volatile oldintp; 669 off_t volatile hashbytes; 670 int hash_interval; 671 const char *lmode; 672 static size_t bufsize; 673 static char *buf; 674 int oprogress; 675 676 hashbytes = mark; 677 direction = "sent"; 678 dout = NULL; 679 bytes = 0; 680 filesize = -1; 681 oprogress = progress; 682 if (verbose && printnames) { 683 if (*local != '-') 684 fprintf(ttyout, "local: %s ", local); 685 if (remote) 686 fprintf(ttyout, "remote: %s\n", remote); 687 } 688 if (proxy) { 689 proxtrans(cmd, local, remote); 690 return; 691 } 692 if (curtype != type) 693 changetype(type, 0); 694 closefunc = NULL; 695 oldintr = NULL; 696 oldintp = NULL; 697 lmode = "w"; 698 if (sigsetjmp(xferabort, 1)) { 699 while (cpend) 700 (void)getreply(0); 701 code = -1; 702 goto cleanupsend; 703 } 704 (void)xsignal(SIGQUIT, psummary); 705 oldintr = xsignal(SIGINT, abortxfer); 706 if (strcmp(local, "-") == 0) { 707 fin = stdin; 708 progress = 0; 709 } else if (*local == '|') { 710 oldintp = xsignal(SIGPIPE, SIG_IGN); 711 fin = popen(local + 1, "r"); 712 if (fin == NULL) { 713 warn("Can't execute `%s'", local + 1); 714 code = -1; 715 goto cleanupsend; 716 } 717 progress = 0; 718 closefunc = pclose; 719 } else { 720 fin = fopen(local, "r"); 721 if (fin == NULL) { 722 warn("Can't open `%s'", local); 723 code = -1; 724 goto cleanupsend; 725 } 726 closefunc = fclose; 727 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 728 fprintf(ttyout, "%s: not a plain file.\n", local); 729 code = -1; 730 goto cleanupsend; 731 } 732 filesize = st.st_size; 733 } 734 if (initconn()) { 735 code = -1; 736 goto cleanupsend; 737 } 738 if (sigsetjmp(xferabort, 1)) 739 goto abort; 740 741 if (restart_point && 742 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 743 int rc; 744 745 rc = -1; 746 switch (curtype) { 747 case TYPE_A: 748 rc = fseeko(fin, restart_point, SEEK_SET); 749 break; 750 case TYPE_I: 751 case TYPE_L: 752 rc = lseek(fileno(fin), restart_point, SEEK_SET); 753 break; 754 } 755 if (rc < 0) { 756 warn("Can't seek to restart `%s'", local); 757 goto cleanupsend; 758 } 759 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 760 goto cleanupsend; 761 lmode = "r+"; 762 } 763 if (remote) { 764 if (command("%s %s", cmd, remote) != PRELIM) 765 goto cleanupsend; 766 } else { 767 if (command("%s", cmd) != PRELIM) 768 goto cleanupsend; 769 } 770 dirchange = 1; 771 dout = dataconn(lmode); 772 if (dout == NULL) 773 goto abort; 774 775 if ((size_t)sndbuf_size > bufsize) { 776 if (buf) 777 (void)free(buf); 778 bufsize = sndbuf_size; 779 buf = ftp_malloc(bufsize); 780 } 781 782 progressmeter(-1); 783 oldintp = xsignal(SIGPIPE, SIG_IGN); 784 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 785 786 switch (curtype) { 787 788 case TYPE_I: 789 case TYPE_L: 790 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 791 rate_put, hash_interval); 792 if (c == 1) { 793 warn("Reading `%s'", local); 794 } else if (c == 2) { 795 if (errno != EPIPE) 796 warn("Writing to network"); 797 bytes = -1; 798 } 799 break; 800 801 case TYPE_A: 802 while ((c = getc(fin)) != EOF) { 803 if (c == '\n') { 804 while (hash_interval && bytes >= hashbytes) { 805 (void)putc('#', ttyout); 806 (void)fflush(ttyout); 807 hashbytes += mark; 808 } 809 if (ferror(dout)) 810 break; 811 (void)putc('\r', dout); 812 bytes++; 813 } 814 (void)putc(c, dout); 815 bytes++; 816#if 0 /* this violates RFC0959 */ 817 if (c == '\r') { 818 (void)putc('\0', dout); 819 bytes++; 820 } 821#endif 822 } 823 if (hash_interval) { 824 if (bytes < hashbytes) 825 (void)putc('#', ttyout); 826 (void)putc('\n', ttyout); 827 } 828 if (ferror(fin)) 829 warn("Reading `%s'", local); 830 if (ferror(dout)) { 831 if (errno != EPIPE) 832 warn("Writing to network"); 833 bytes = -1; 834 } 835 break; 836 } 837 838 progressmeter(1); 839 if (closefunc != NULL) { 840 (*closefunc)(fin); 841 fin = NULL; 842 } 843 (void)fclose(dout); 844 dout = NULL; 845 (void)getreply(0); 846 if (bytes > 0) 847 ptransfer(0); 848 goto cleanupsend; 849 850 abort: 851 (void)xsignal(SIGINT, oldintr); 852 oldintr = NULL; 853 if (!cpend) { 854 code = -1; 855 goto cleanupsend; 856 } 857 if (data >= 0) { 858 (void)close(data); 859 data = -1; 860 } 861 if (dout) { 862 (void)fclose(dout); 863 dout = NULL; 864 } 865 (void)getreply(0); 866 code = -1; 867 if (bytes > 0) 868 ptransfer(0); 869 870 cleanupsend: 871 if (oldintr) 872 (void)xsignal(SIGINT, oldintr); 873 if (oldintp) 874 (void)xsignal(SIGPIPE, oldintp); 875 if (data >= 0) { 876 (void)close(data); 877 data = -1; 878 } 879 if (closefunc != NULL && fin != NULL) 880 (*closefunc)(fin); 881 if (dout) 882 (void)fclose(dout); 883 progress = oprogress; 884 restart_point = 0; 885 bytes = 0; 886} 887 888void 889recvrequest(const char *cmd, const char *volatile local, const char *remote, 890 const char *lmode, int printnames, int ignorespecial) 891{ 892 FILE *volatile fout; 893 FILE *volatile din; 894 int (*volatile closefunc)(FILE *); 895 sigfunc volatile oldintr; 896 sigfunc volatile oldintp; 897 int c, d; 898 int volatile is_retr; 899 int volatile tcrflag; 900 int volatile bare_lfs; 901 static size_t bufsize; 902 static char *buf; 903 off_t volatile hashbytes; 904 int hash_interval; 905 struct stat st; 906 time_t mtime; 907 struct timeval tval[2]; 908 int oprogress; 909 int opreserve; 910 911 fout = NULL; 912 din = NULL; 913 hashbytes = mark; 914 direction = "received"; 915 bytes = 0; 916 bare_lfs = 0; 917 filesize = -1; 918 oprogress = progress; 919 opreserve = preserve; 920 is_retr = (strcmp(cmd, "RETR") == 0); 921 if (is_retr && verbose && printnames) { 922 if (ignorespecial || *local != '-') 923 fprintf(ttyout, "local: %s ", local); 924 if (remote) 925 fprintf(ttyout, "remote: %s\n", remote); 926 } 927 if (proxy && is_retr) { 928 proxtrans(cmd, local, remote); 929 return; 930 } 931 closefunc = NULL; 932 oldintr = NULL; 933 oldintp = NULL; 934 tcrflag = !crflag && is_retr; 935 if (sigsetjmp(xferabort, 1)) { 936 while (cpend) 937 (void)getreply(0); 938 code = -1; 939 goto cleanuprecv; 940 } 941 (void)xsignal(SIGQUIT, psummary); 942 oldintr = xsignal(SIGINT, abortxfer); 943 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 944 if (access(local, W_OK) < 0) { 945 char *dir = strrchr(local, '/'); 946 947 if (errno != ENOENT && errno != EACCES) { 948 warn("Can't access `%s'", local); 949 code = -1; 950 goto cleanuprecv; 951 } 952 if (dir != NULL) 953 *dir = 0; 954 d = access(dir == local ? "/" : 955 dir ? local : ".", W_OK); 956 if (dir != NULL) 957 *dir = '/'; 958 if (d < 0) { 959 warn("Can't access `%s'", local); 960 code = -1; 961 goto cleanuprecv; 962 } 963 if (!runique && errno == EACCES && 964 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 965 warn("Can't chmod `%s'", local); 966 code = -1; 967 goto cleanuprecv; 968 } 969 if (runique && errno == EACCES && 970 (local = gunique(local)) == NULL) { 971 code = -1; 972 goto cleanuprecv; 973 } 974 } 975 else if (runique && (local = gunique(local)) == NULL) { 976 code = -1; 977 goto cleanuprecv; 978 } 979 } 980 if (!is_retr) { 981 if (curtype != TYPE_A) 982 changetype(TYPE_A, 0); 983 } else { 984 if (curtype != type) 985 changetype(type, 0); 986 filesize = remotesize(remote, 0); 987 if (code == 421 || code == -1) 988 goto cleanuprecv; 989 } 990 if (initconn()) { 991 code = -1; 992 goto cleanuprecv; 993 } 994 if (sigsetjmp(xferabort, 1)) 995 goto abort; 996 if (is_retr && restart_point && 997 command("REST " LLF, (LLT) restart_point) != CONTINUE) 998 goto cleanuprecv; 999 if (! EMPTYSTRING(remote)) { 1000 if (command("%s %s", cmd, remote) != PRELIM) 1001 goto cleanuprecv; 1002 } else { 1003 if (command("%s", cmd) != PRELIM) 1004 goto cleanuprecv; 1005 } 1006 din = dataconn("r"); 1007 if (din == NULL) 1008 goto abort; 1009 if (!ignorespecial && strcmp(local, "-") == 0) { 1010 fout = stdout; 1011 progress = 0; 1012 preserve = 0; 1013 } else if (!ignorespecial && *local == '|') { 1014 oldintp = xsignal(SIGPIPE, SIG_IGN); 1015 fout = popen(local + 1, "w"); 1016 if (fout == NULL) { 1017 warn("Can't execute `%s'", local+1); 1018 goto abort; 1019 } 1020 progress = 0; 1021 preserve = 0; 1022 closefunc = pclose; 1023 } else { 1024 fout = fopen(local, lmode); 1025 if (fout == NULL) { 1026 warn("Can't open `%s'", local); 1027 goto abort; 1028 } 1029 closefunc = fclose; 1030 } 1031 1032 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1033 progress = 0; 1034 preserve = 0; 1035 } 1036 if ((size_t)rcvbuf_size > bufsize) { 1037 if (buf) 1038 (void)free(buf); 1039 bufsize = rcvbuf_size; 1040 buf = ftp_malloc(bufsize); 1041 } 1042 1043 progressmeter(-1); 1044 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1045 1046 switch (curtype) { 1047 1048 case TYPE_I: 1049 case TYPE_L: 1050 if (is_retr && restart_point && 1051 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1052 warn("Can't seek to restart `%s'", local); 1053 goto cleanuprecv; 1054 } 1055 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1056 rate_get, hash_interval); 1057 if (c == 1) { 1058 if (errno != EPIPE) 1059 warn("Reading from network"); 1060 bytes = -1; 1061 } else if (c == 2) { 1062 warn("Writing `%s'", local); 1063 } 1064 break; 1065 1066 case TYPE_A: 1067 if (is_retr && restart_point) { 1068 int ch; 1069 off_t i; 1070 1071 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1072 goto done; 1073 for (i = 0; i++ < restart_point;) { 1074 if ((ch = getc(fout)) == EOF) 1075 goto done; 1076 if (ch == '\n') 1077 i++; 1078 } 1079 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1080 done: 1081 warn("Can't seek to restart `%s'", local); 1082 goto cleanuprecv; 1083 } 1084 } 1085 while ((c = getc(din)) != EOF) { 1086 if (c == '\n') 1087 bare_lfs++; 1088 while (c == '\r') { 1089 while (hash_interval && bytes >= hashbytes) { 1090 (void)putc('#', ttyout); 1091 (void)fflush(ttyout); 1092 hashbytes += mark; 1093 } 1094 bytes++; 1095 if ((c = getc(din)) != '\n' || tcrflag) { 1096 if (ferror(fout)) 1097 goto break2; 1098 (void)putc('\r', fout); 1099 if (c == '\0') { 1100 bytes++; 1101 goto contin2; 1102 } 1103 if (c == EOF) 1104 goto contin2; 1105 } 1106 } 1107 (void)putc(c, fout); 1108 bytes++; 1109 contin2: ; 1110 } 1111 break2: 1112 if (hash_interval) { 1113 if (bytes < hashbytes) 1114 (void)putc('#', ttyout); 1115 (void)putc('\n', ttyout); 1116 } 1117 if (ferror(din)) { 1118 if (errno != EPIPE) 1119 warn("Reading from network"); 1120 bytes = -1; 1121 } 1122 if (ferror(fout)) 1123 warn("Writing `%s'", local); 1124 break; 1125 } 1126 1127 progressmeter(1); 1128 if (closefunc != NULL) { 1129 (*closefunc)(fout); 1130 fout = NULL; 1131 } 1132 (void)fclose(din); 1133 din = NULL; 1134 (void)getreply(0); 1135 if (bare_lfs) { 1136 fprintf(ttyout, 1137 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1138 bare_lfs); 1139 fputs("File may not have transferred correctly.\n", ttyout); 1140 } 1141 if (bytes >= 0 && is_retr) { 1142 if (bytes > 0) 1143 ptransfer(0); 1144 if (preserve && (closefunc == fclose)) { 1145 mtime = remotemodtime(remote, 0); 1146 if (mtime != -1) { 1147 (void)gettimeofday(&tval[0], NULL); 1148 tval[1].tv_sec = mtime; 1149 tval[1].tv_usec = 0; 1150 if (utimes(local, tval) == -1) { 1151 fprintf(ttyout, 1152 "Can't change modification time on %s to %s", 1153 local, 1154 rfc2822time(localtime(&mtime))); 1155 } 1156 } 1157 } 1158 } 1159 goto cleanuprecv; 1160 1161 abort: 1162 /* 1163 * abort using RFC0959 recommended IP,SYNC sequence 1164 */ 1165 if (! sigsetjmp(xferabort, 1)) { 1166 /* this is the first call */ 1167 (void)xsignal(SIGINT, abort_squared); 1168 if (!cpend) { 1169 code = -1; 1170 goto cleanuprecv; 1171 } 1172 abort_remote(din); 1173 } 1174 code = -1; 1175 if (bytes > 0) 1176 ptransfer(0); 1177 1178 cleanuprecv: 1179 if (oldintr) 1180 (void)xsignal(SIGINT, oldintr); 1181 if (oldintp) 1182 (void)xsignal(SIGPIPE, oldintp); 1183 if (data >= 0) { 1184 (void)close(data); 1185 data = -1; 1186 } 1187 if (closefunc != NULL && fout != NULL) 1188 (*closefunc)(fout); 1189 if (din) 1190 (void)fclose(din); 1191 progress = oprogress; 1192 preserve = opreserve; 1193 bytes = 0; 1194} 1195 1196/* 1197 * Need to start a listen on the data channel before we send the command, 1198 * otherwise the server's connect may fail. 1199 */ 1200int 1201initconn(void) 1202{ 1203 char *p, *a; 1204 int result, tmpno = 0; 1205 int on = 1; 1206 int error; 1207 unsigned int addr[16], port[2]; 1208 unsigned int af, hal, pal; 1209 socklen_t len; 1210 const char *pasvcmd = NULL; 1211 int overbose; 1212 1213#ifdef INET6 1214#ifndef NO_DEBUG 1215 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1216 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1217 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1218 warnx("Use of scoped addresses can be troublesome"); 1219 } 1220#endif 1221#endif 1222 1223 reinit: 1224 if (passivemode) { 1225 data_addr = myctladdr; 1226 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1227 if (data < 0) { 1228 warn("Can't create socket for data connection"); 1229 return (1); 1230 } 1231 if ((options & SO_DEBUG) && 1232 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1233 (void *)&on, sizeof(on)) == -1) { 1234 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1235 } 1236 result = COMPLETE + 1; 1237 switch (data_addr.su_family) { 1238 case AF_INET: 1239 if (epsv4 && !epsv4bad) { 1240 pasvcmd = "EPSV"; 1241 overbose = verbose; 1242 if (ftp_debug == 0) 1243 verbose = -1; 1244 result = command("EPSV"); 1245 verbose = overbose; 1246 if (verbose > 0 && 1247 (result == COMPLETE || !connected)) 1248 fprintf(ttyout, "%s\n", reply_string); 1249 if (!connected) 1250 return (1); 1251 /* 1252 * this code is to be friendly with broken 1253 * BSDI ftpd 1254 */ 1255 if (code / 10 == 22 && code != 229) { 1256 fputs( 1257"wrong server: return code must be 229\n", 1258 ttyout); 1259 result = COMPLETE + 1; 1260 } 1261 if (result != COMPLETE) { 1262 epsv4bad = 1; 1263 DPRINTF("disabling epsv4 for this " 1264 "connection\n"); 1265 } 1266 } 1267 if (result != COMPLETE) { 1268 pasvcmd = "PASV"; 1269 result = command("PASV"); 1270 if (!connected) 1271 return (1); 1272 } 1273 break; 1274#ifdef INET6 1275 case AF_INET6: 1276 if (epsv6 && !epsv6bad) { 1277 pasvcmd = "EPSV"; 1278 overbose = verbose; 1279 if (ftp_debug == 0) 1280 verbose = -1; 1281 result = command("EPSV"); 1282 verbose = overbose; 1283 if (verbose > 0 && 1284 (result == COMPLETE || !connected)) 1285 fprintf(ttyout, "%s\n", reply_string); 1286 if (!connected) 1287 return (1); 1288 /* 1289 * this code is to be friendly with 1290 * broken BSDI ftpd 1291 */ 1292 if (code / 10 == 22 && code != 229) { 1293 fputs( 1294 "wrong server: return code must be 229\n", 1295 ttyout); 1296 result = COMPLETE + 1; 1297 } 1298 if (result != COMPLETE) { 1299 epsv6bad = 1; 1300 DPRINTF("disabling epsv6 for this " 1301 "connection\n"); 1302 } 1303 } 1304 if (result != COMPLETE) { 1305 pasvcmd = "LPSV"; 1306 result = command("LPSV"); 1307 } 1308 if (!connected) 1309 return (1); 1310 break; 1311#endif 1312 default: 1313 result = COMPLETE + 1; 1314 break; 1315 } 1316 if (result != COMPLETE) { 1317 if (activefallback) { 1318 (void)close(data); 1319 data = -1; 1320 passivemode = 0; 1321#if 0 1322 activefallback = 0; 1323#endif 1324 goto reinit; 1325 } 1326 fputs("Passive mode refused.\n", ttyout); 1327 goto bad; 1328 } 1329 1330#define pack2(var, off) \ 1331 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1332#define pack4(var, off) \ 1333 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1334 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1335#define UC(b) (((int)b)&0xff) 1336 1337 /* 1338 * What we've got at this point is a string of comma separated 1339 * one-byte unsigned integer values, separated by commas. 1340 */ 1341 if (strcmp(pasvcmd, "PASV") == 0) { 1342 if (data_addr.su_family != AF_INET) { 1343 fputs( 1344 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1345 error = 1; 1346 goto bad; 1347 } 1348 if (code / 10 == 22 && code != 227) { 1349 fputs("wrong server: return code must be 227\n", 1350 ttyout); 1351 error = 1; 1352 goto bad; 1353 } 1354 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1355 &addr[0], &addr[1], &addr[2], &addr[3], 1356 &port[0], &port[1]); 1357 if (error != 6) { 1358 fputs( 1359"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1360 error = 1; 1361 goto bad; 1362 } 1363 error = 0; 1364 memset(&data_addr, 0, sizeof(data_addr)); 1365 data_addr.su_family = AF_INET; 1366 data_addr.su_len = sizeof(struct sockaddr_in); 1367 data_addr.si_su.su_sin.sin_addr.s_addr = 1368 htonl(pack4(addr, 0)); 1369 data_addr.su_port = htons(pack2(port, 0)); 1370 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1371 if (code / 10 == 22 && code != 228) { 1372 fputs("wrong server: return code must be 228\n", 1373 ttyout); 1374 error = 1; 1375 goto bad; 1376 } 1377 switch (data_addr.su_family) { 1378 case AF_INET: 1379 error = sscanf(pasv, 1380"%u,%u,%u,%u,%u,%u,%u,%u,%u", 1381 &af, &hal, 1382 &addr[0], &addr[1], &addr[2], &addr[3], 1383 &pal, &port[0], &port[1]); 1384 if (error != 9) { 1385 fputs( 1386"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1387 error = 1; 1388 goto bad; 1389 } 1390 if (af != 4 || hal != 4 || pal != 2) { 1391 fputs( 1392"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1393 error = 1; 1394 goto bad; 1395 } 1396 1397 error = 0; 1398 memset(&data_addr, 0, sizeof(data_addr)); 1399 data_addr.su_family = AF_INET; 1400 data_addr.su_len = sizeof(struct sockaddr_in); 1401 data_addr.si_su.su_sin.sin_addr.s_addr = 1402 htonl(pack4(addr, 0)); 1403 data_addr.su_port = htons(pack2(port, 0)); 1404 break; 1405#ifdef INET6 1406 case AF_INET6: 1407 error = sscanf(pasv, 1408"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1409 &af, &hal, 1410 &addr[0], &addr[1], &addr[2], &addr[3], 1411 &addr[4], &addr[5], &addr[6], &addr[7], 1412 &addr[8], &addr[9], &addr[10], 1413 &addr[11], &addr[12], &addr[13], 1414 &addr[14], &addr[15], 1415 &pal, &port[0], &port[1]); 1416 if (error != 21) { 1417 fputs( 1418"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1419 error = 1; 1420 goto bad; 1421 } 1422 if (af != 6 || hal != 16 || pal != 2) { 1423 fputs( 1424"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1425 error = 1; 1426 goto bad; 1427 } 1428 1429 error = 0; 1430 memset(&data_addr, 0, sizeof(data_addr)); 1431 data_addr.su_family = AF_INET6; 1432 data_addr.su_len = sizeof(struct sockaddr_in6); 1433 { 1434 size_t i; 1435 for (i = 0; i < sizeof(struct in6_addr); i++) { 1436 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1437 UC(addr[i]); 1438 } 1439 } 1440 data_addr.su_port = htons(pack2(port, 0)); 1441 break; 1442#endif 1443 default: 1444 error = 1; 1445 } 1446 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1447 char delim[4]; 1448 1449 port[0] = 0; 1450 if (code / 10 == 22 && code != 229) { 1451 fputs("wrong server: return code must be 229\n", 1452 ttyout); 1453 error = 1; 1454 goto bad; 1455 } 1456 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1457 &delim[1], &delim[2], &port[1], 1458 &delim[3]) != 5) { 1459 fputs("parse error!\n", ttyout); 1460 error = 1; 1461 goto bad; 1462 } 1463 if (delim[0] != delim[1] || delim[0] != delim[2] 1464 || delim[0] != delim[3]) { 1465 fputs("parse error!\n", ttyout); 1466 error = 1; 1467 goto bad; 1468 } 1469 data_addr = hisctladdr; 1470 data_addr.su_port = htons(port[1]); 1471 } else 1472 goto bad; 1473 1474 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1475 data_addr.su_len) < 0) { 1476 if (activefallback) { 1477 (void)close(data); 1478 data = -1; 1479 passivemode = 0; 1480#if 0 1481 activefallback = 0; 1482#endif 1483 goto reinit; 1484 } 1485 goto bad; 1486 } 1487#ifdef IPTOS_THROUGHPUT 1488 if (data_addr.su_family == AF_INET) { 1489 on = IPTOS_THROUGHPUT; 1490 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1491 (void *)&on, sizeof(on)) == -1) { 1492 DWARN("setsockopt %s (ignored)", 1493 "IPTOS_THROUGHPUT"); 1494 } 1495 } 1496#endif 1497 return (0); 1498 } 1499 1500 noport: 1501 data_addr = myctladdr; 1502 if (sendport) 1503 data_addr.su_port = 0; /* let system pick one */ 1504 if (data != -1) 1505 (void)close(data); 1506 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1507 if (data < 0) { 1508 warn("Can't create socket for data connection"); 1509 if (tmpno) 1510 sendport = 1; 1511 return (1); 1512 } 1513 if (!sendport) 1514 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1515 (void *)&on, sizeof(on)) == -1) { 1516 warn("Can't set SO_REUSEADDR on data connection"); 1517 goto bad; 1518 } 1519 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1520 data_addr.su_len) < 0) { 1521 warn("Can't bind for data connection"); 1522 goto bad; 1523 } 1524 if ((options & SO_DEBUG) && 1525 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1526 (void *)&on, sizeof(on)) == -1) { 1527 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1528 } 1529 len = sizeof(data_addr.si_su); 1530 memset((char *)&data_addr, 0, sizeof (data_addr)); 1531 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1532 warn("Can't determine my address of data connection"); 1533 goto bad; 1534 } 1535 data_addr.su_len = len; 1536 if (ftp_listen(data, 1) < 0) 1537 warn("Can't listen to data connection"); 1538 1539 if (sendport) { 1540 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1541 struct sockinet tmp; 1542 1543 switch (data_addr.su_family) { 1544 case AF_INET: 1545 if (!epsv4 || epsv4bad) { 1546 result = COMPLETE + 1; 1547 break; 1548 } 1549 /* FALLTHROUGH */ 1550#ifdef INET6 1551 case AF_INET6: 1552 if (!epsv6 || epsv6bad) { 1553 result = COMPLETE + 1; 1554 break; 1555 } 1556#endif 1557 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1558 tmp = data_addr; 1559#ifdef INET6 1560 if (tmp.su_family == AF_INET6) 1561 tmp.si_su.su_sin6.sin6_scope_id = 0; 1562#endif 1563 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1564 tmp.su_len, hname, sizeof(hname), sname, 1565 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1566 result = ERROR; 1567 } else { 1568 overbose = verbose; 1569 if (ftp_debug == 0) 1570 verbose = -1; 1571 result = command("EPRT |%u|%s|%s|", af, hname, 1572 sname); 1573 verbose = overbose; 1574 if (verbose > 0 && 1575 (result == COMPLETE || !connected)) 1576 fprintf(ttyout, "%s\n", reply_string); 1577 if (!connected) 1578 return (1); 1579 if (result != COMPLETE) { 1580 epsv4bad = 1; 1581 DPRINTF("disabling epsv4 for this " 1582 "connection\n"); 1583 } 1584 } 1585 break; 1586 default: 1587 result = COMPLETE + 1; 1588 break; 1589 } 1590 if (result == COMPLETE) 1591 goto skip_port; 1592 1593 switch (data_addr.su_family) { 1594 case AF_INET: 1595 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1596 p = (char *)&data_addr.su_port; 1597 result = command("PORT %d,%d,%d,%d,%d,%d", 1598 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1599 UC(p[0]), UC(p[1])); 1600 break; 1601#ifdef INET6 1602 case AF_INET6: 1603 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1604 p = (char *)&data_addr.su_port; 1605 result = command( 1606 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1607 6, 16, 1608 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1609 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1610 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1611 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1612 2, UC(p[0]), UC(p[1])); 1613 break; 1614#endif 1615 default: 1616 result = COMPLETE + 1; /* xxx */ 1617 } 1618 if (!connected) 1619 return (1); 1620 skip_port: 1621 1622 if (result == ERROR && sendport == -1) { 1623 sendport = 0; 1624 tmpno = 1; 1625 goto noport; 1626 } 1627 return (result != COMPLETE); 1628 } 1629 if (tmpno) 1630 sendport = 1; 1631#ifdef IPTOS_THROUGHPUT 1632 if (data_addr.su_family == AF_INET) { 1633 on = IPTOS_THROUGHPUT; 1634 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1635 (void *)&on, sizeof(on)) == -1) { 1636 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1637 } 1638 } 1639#endif 1640 return (0); 1641 bad: 1642 (void)close(data); 1643 data = -1; 1644 if (tmpno) 1645 sendport = 1; 1646 return (1); 1647} 1648 1649FILE * 1650dataconn(const char *lmode) 1651{ 1652 struct sockinet from; 1653 int s, flags, rv, timeout; 1654 struct timeval endtime, now, td; 1655 struct pollfd pfd[1]; 1656 socklen_t fromlen; 1657 1658 if (passivemode) /* passive data connection */ 1659 return (fdopen(data, lmode)); 1660 1661 /* active mode data connection */ 1662 1663 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1664 goto dataconn_failed; /* get current socket flags */ 1665 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1666 goto dataconn_failed; /* set non-blocking connect */ 1667 1668 /* NOTE: we now must restore socket flags on successful exit */ 1669 1670 /* limit time waiting on listening socket */ 1671 pfd[0].fd = data; 1672 pfd[0].events = POLLIN; 1673 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1674 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1675 /* without -q, default to 60s */ 1676 do { 1677 (void)gettimeofday(&now, NULL); 1678 timersub(&endtime, &now, &td); 1679 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1680 if (timeout < 0) 1681 timeout = 0; 1682 rv = ftp_poll(pfd, 1, timeout); 1683 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1684 if (rv == -1) { 1685 warn("Can't poll waiting before accept"); 1686 goto dataconn_failed; 1687 } 1688 if (rv == 0) { 1689 warnx("Poll timeout waiting before accept"); 1690 goto dataconn_failed; 1691 } 1692 1693 /* (non-blocking) accept the connection */ 1694 fromlen = myctladdr.su_len; 1695 do { 1696 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1697 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1698 if (s == -1) { 1699 warn("Can't accept data connection"); 1700 goto dataconn_failed; 1701 } 1702 1703 (void)close(data); 1704 data = s; 1705 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1706 goto dataconn_failed; 1707 1708#ifdef IPTOS_THROUGHPUT 1709 if (from.su_family == AF_INET) { 1710 int tos = IPTOS_THROUGHPUT; 1711 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1712 (void *)&tos, sizeof(tos)) == -1) { 1713 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1714 } 1715 } 1716#endif 1717 return (fdopen(data, lmode)); 1718 1719 dataconn_failed: 1720 (void)close(data); 1721 data = -1; 1722 return (NULL); 1723} 1724 1725void 1726psabort(int notused) 1727{ 1728 int oerrno = errno; 1729 1730 sigint_raised = 1; 1731 alarmtimer(0); 1732 abrtflag++; 1733 errno = oerrno; 1734} 1735 1736void 1737pswitch(int flag) 1738{ 1739 sigfunc oldintr; 1740 static struct comvars { 1741 int connect; 1742 char name[MAXHOSTNAMELEN]; 1743 struct sockinet mctl; 1744 struct sockinet hctl; 1745 FILE *in; 1746 FILE *out; 1747 int tpe; 1748 int curtpe; 1749 int cpnd; 1750 int sunqe; 1751 int runqe; 1752 int mcse; 1753 int ntflg; 1754 char nti[17]; 1755 char nto[17]; 1756 int mapflg; 1757 char mi[MAXPATHLEN]; 1758 char mo[MAXPATHLEN]; 1759 } proxstruct, tmpstruct; 1760 struct comvars *ip, *op; 1761 1762 abrtflag = 0; 1763 oldintr = xsignal(SIGINT, psabort); 1764 if (flag) { 1765 if (proxy) 1766 return; 1767 ip = &tmpstruct; 1768 op = &proxstruct; 1769 proxy++; 1770 } else { 1771 if (!proxy) 1772 return; 1773 ip = &proxstruct; 1774 op = &tmpstruct; 1775 proxy = 0; 1776 } 1777 ip->connect = connected; 1778 connected = op->connect; 1779 if (hostname) 1780 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1781 else 1782 ip->name[0] = '\0'; 1783 hostname = op->name; 1784 ip->hctl = hisctladdr; 1785 hisctladdr = op->hctl; 1786 ip->mctl = myctladdr; 1787 myctladdr = op->mctl; 1788 ip->in = cin; 1789 cin = op->in; 1790 ip->out = cout; 1791 cout = op->out; 1792 ip->tpe = type; 1793 type = op->tpe; 1794 ip->curtpe = curtype; 1795 curtype = op->curtpe; 1796 ip->cpnd = cpend; 1797 cpend = op->cpnd; 1798 ip->sunqe = sunique; 1799 sunique = op->sunqe; 1800 ip->runqe = runique; 1801 runique = op->runqe; 1802 ip->mcse = mcase; 1803 mcase = op->mcse; 1804 ip->ntflg = ntflag; 1805 ntflag = op->ntflg; 1806 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1807 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1808 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1809 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1810 ip->mapflg = mapflag; 1811 mapflag = op->mapflg; 1812 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1813 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1814 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1815 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1816 (void)xsignal(SIGINT, oldintr); 1817 if (abrtflag) { 1818 abrtflag = 0; 1819 (*oldintr)(SIGINT); 1820 } 1821} 1822 1823void 1824abortpt(int notused) 1825{ 1826 1827 sigint_raised = 1; 1828 alarmtimer(0); 1829 if (fromatty) 1830 write(fileno(ttyout), "\n", 1); 1831 ptabflg++; 1832 mflag = 0; 1833 abrtflag = 0; 1834 siglongjmp(ptabort, 1); 1835} 1836 1837void 1838proxtrans(const char *cmd, const char *local, const char *remote) 1839{ 1840 sigfunc volatile oldintr; 1841 int prox_type, nfnd; 1842 int volatile secndflag; 1843 const char *volatile cmd2; 1844 1845 oldintr = NULL; 1846 secndflag = 0; 1847 if (strcmp(cmd, "RETR")) 1848 cmd2 = "RETR"; 1849 else 1850 cmd2 = runique ? "STOU" : "STOR"; 1851 if ((prox_type = type) == 0) { 1852 if (unix_server && unix_proxy) 1853 prox_type = TYPE_I; 1854 else 1855 prox_type = TYPE_A; 1856 } 1857 if (curtype != prox_type) 1858 changetype(prox_type, 1); 1859 if (command("PASV") != COMPLETE) { 1860 fputs("proxy server does not support third party transfers.\n", 1861 ttyout); 1862 return; 1863 } 1864 pswitch(0); 1865 if (!connected) { 1866 fputs("No primary connection.\n", ttyout); 1867 pswitch(1); 1868 code = -1; 1869 return; 1870 } 1871 if (curtype != prox_type) 1872 changetype(prox_type, 1); 1873 if (command("PORT %s", pasv) != COMPLETE) { 1874 pswitch(1); 1875 return; 1876 } 1877 if (sigsetjmp(ptabort, 1)) 1878 goto abort; 1879 oldintr = xsignal(SIGINT, abortpt); 1880 if ((restart_point && 1881 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1882 || (command("%s %s", cmd, remote) != PRELIM)) { 1883 (void)xsignal(SIGINT, oldintr); 1884 pswitch(1); 1885 return; 1886 } 1887 sleep(2); 1888 pswitch(1); 1889 secndflag++; 1890 if ((restart_point && 1891 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1892 || (command("%s %s", cmd2, local) != PRELIM)) 1893 goto abort; 1894 ptflag++; 1895 (void)getreply(0); 1896 pswitch(0); 1897 (void)getreply(0); 1898 (void)xsignal(SIGINT, oldintr); 1899 pswitch(1); 1900 ptflag = 0; 1901 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1902 return; 1903 abort: 1904 if (sigsetjmp(xferabort, 1)) { 1905 (void)xsignal(SIGINT, oldintr); 1906 return; 1907 } 1908 (void)xsignal(SIGINT, abort_squared); 1909 ptflag = 0; 1910 if (strcmp(cmd, "RETR") && !proxy) 1911 pswitch(1); 1912 else if (!strcmp(cmd, "RETR") && proxy) 1913 pswitch(0); 1914 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1915 if (command("%s %s", cmd2, local) != PRELIM) { 1916 pswitch(0); 1917 if (cpend) 1918 abort_remote(NULL); 1919 } 1920 pswitch(1); 1921 if (ptabflg) 1922 code = -1; 1923 (void)xsignal(SIGINT, oldintr); 1924 return; 1925 } 1926 if (cpend) 1927 abort_remote(NULL); 1928 pswitch(!proxy); 1929 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1930 if (command("%s %s", cmd2, local) != PRELIM) { 1931 pswitch(0); 1932 if (cpend) 1933 abort_remote(NULL); 1934 pswitch(1); 1935 if (ptabflg) 1936 code = -1; 1937 (void)xsignal(SIGINT, oldintr); 1938 return; 1939 } 1940 } 1941 if (cpend) 1942 abort_remote(NULL); 1943 pswitch(!proxy); 1944 if (cpend) { 1945 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1946 if (nfnd < 0) 1947 warn("Error aborting proxy command"); 1948 if (ptabflg) 1949 code = -1; 1950 lostpeer(0); 1951 } 1952 (void)getreply(0); 1953 (void)getreply(0); 1954 } 1955 if (proxy) 1956 pswitch(0); 1957 pswitch(1); 1958 if (ptabflg) 1959 code = -1; 1960 (void)xsignal(SIGINT, oldintr); 1961} 1962 1963void 1964reset(int argc, char *argv[]) 1965{ 1966 int nfnd = 1; 1967 1968 if (argc == 0 && argv != NULL) { 1969 UPRINTF("usage: %s\n", argv[0]); 1970 code = -1; 1971 return; 1972 } 1973 while (nfnd > 0) { 1974 if ((nfnd = empty(cin, NULL, 0)) < 0) { 1975 warn("Error resetting connection"); 1976 code = -1; 1977 lostpeer(0); 1978 } else if (nfnd) 1979 (void)getreply(0); 1980 } 1981} 1982 1983char * 1984gunique(const char *local) 1985{ 1986 static char new[MAXPATHLEN]; 1987 char *cp = strrchr(local, '/'); 1988 int d, count=0, len; 1989 char ext = '1'; 1990 1991 if (cp) 1992 *cp = '\0'; 1993 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 1994 if (cp) 1995 *cp = '/'; 1996 if (d < 0) { 1997 warn("Can't access `%s'", local); 1998 return (NULL); 1999 } 2000 len = strlcpy(new, local, sizeof(new)); 2001 cp = &new[len]; 2002 *cp++ = '.'; 2003 while (!d) { 2004 if (++count == 100) { 2005 fputs("runique: can't find unique file name.\n", 2006 ttyout); 2007 return (NULL); 2008 } 2009 *cp++ = ext; 2010 *cp = '\0'; 2011 if (ext == '9') 2012 ext = '0'; 2013 else 2014 ext++; 2015 if ((d = access(new, F_OK)) < 0) 2016 break; 2017 if (ext != '0') 2018 cp--; 2019 else if (*(cp - 2) == '.') 2020 *(cp - 1) = '1'; 2021 else { 2022 *(cp - 2) = *(cp - 2) + 1; 2023 cp--; 2024 } 2025 } 2026 return (new); 2027} 2028 2029/* 2030 * abort_squared -- 2031 * aborts abort_remote(). lostpeer() is called because if the user is 2032 * too impatient to wait or there's another problem then ftp really 2033 * needs to get back to a known state. 2034 */ 2035void 2036abort_squared(int dummy) 2037{ 2038 char msgbuf[100]; 2039 size_t len; 2040 2041 sigint_raised = 1; 2042 alarmtimer(0); 2043 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2044 sizeof(msgbuf)); 2045 write(fileno(ttyout), msgbuf, len); 2046 lostpeer(0); 2047 siglongjmp(xferabort, 1); 2048} 2049 2050void 2051abort_remote(FILE *din) 2052{ 2053 unsigned char buf[BUFSIZ]; 2054 int nfnd; 2055 2056 if (cout == NULL) { 2057 warnx("Lost control connection for abort"); 2058 if (ptabflg) 2059 code = -1; 2060 lostpeer(0); 2061 return; 2062 } 2063 /* 2064 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2065 * after urgent byte rather than before as is protocol now 2066 */ 2067 buf[0] = IAC; 2068 buf[1] = IP; 2069 buf[2] = IAC; 2070 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2071 warn("Can't send abort message"); 2072 fprintf(cout, "%cABOR\r\n", DM); 2073 (void)fflush(cout); 2074 if ((nfnd = empty(cin, din, 10)) <= 0) { 2075 if (nfnd < 0) 2076 warn("Can't send abort message"); 2077 if (ptabflg) 2078 code = -1; 2079 lostpeer(0); 2080 } 2081 if (din && (nfnd & 2)) { 2082 while (read(fileno(din), buf, BUFSIZ) > 0) 2083 continue; 2084 } 2085 if (getreply(0) == ERROR && code == 552) { 2086 /* 552 needed for nic style abort */ 2087 (void)getreply(0); 2088 } 2089 (void)getreply(0); 2090} 2091 2092/* 2093 * Ensure that ai->ai_addr is NOT an IPv4 mapped address. 2094 * IPv4 mapped address complicates too many things in FTP 2095 * protocol handling, as FTP protocol is defined differently 2096 * between IPv4 and IPv6. 2097 * 2098 * This may not be the best way to handle this situation, 2099 * since the semantics of IPv4 mapped address is defined in 2100 * the kernel. There are configurations where we should use 2101 * IPv4 mapped address as native IPv6 address, not as 2102 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 2103 * 2104 * More complete solution would be to have an additional 2105 * getsockopt to grab "real" peername/sockname. "real" 2106 * peername/sockname will be AF_INET if IPv4 mapped address 2107 * is used to embed IPv4 address, and will be AF_INET6 if 2108 * we use it as native. What a mess! 2109 */ 2110void 2111ai_unmapped(struct addrinfo *ai) 2112{ 2113#ifdef INET6 2114 struct sockaddr_in6 *sin6; 2115 struct sockaddr_in sin; 2116 socklen_t len; 2117 2118 if (ai->ai_family != AF_INET6) 2119 return; 2120 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2121 sizeof(sin) > ai->ai_addrlen) 2122 return; 2123 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2124 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2125 return; 2126 2127 memset(&sin, 0, sizeof(sin)); 2128 sin.sin_family = AF_INET; 2129 len = sizeof(struct sockaddr_in); 2130 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2131 sizeof(sin.sin_addr)); 2132 sin.sin_port = sin6->sin6_port; 2133 2134 ai->ai_family = AF_INET; 2135#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 2136 sin.sin_len = len; 2137#endif 2138 memcpy(ai->ai_addr, &sin, len); 2139 ai->ai_addrlen = len; 2140#endif 2141} 2142 2143#ifdef NO_USAGE 2144void 2145xusage(void) 2146{ 2147 fputs("Usage error\n", ttyout); 2148} 2149#endif 2150