1 /* $NetBSD: ftp.c,v 1.162 2011/09/16 15:39:26 joerg Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1985, 1989, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 /* 62 * Copyright (C) 1997 and 1998 WIDE Project. 63 * All rights reserved. 64 * 65 * Redistribution and use in source and binary forms, with or without 66 * modification, are permitted provided that the following conditions 67 * are met: 68 * 1. Redistributions of source code must retain the above copyright 69 * notice, this list of conditions and the following disclaimer. 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in the 72 * documentation and/or other materials provided with the distribution. 73 * 3. Neither the name of the project nor the names of its contributors 74 * may be used to endorse or promote products derived from this software 75 * without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 80 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 87 * SUCH DAMAGE. 88 */ 89 90 #include <sys/cdefs.h> 91 #ifndef lint 92 #if 0 93 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 94 #else 95 __RCSID("$NetBSD: ftp.c,v 1.162 2011/09/16 15:39:26 joerg Exp $"); 96 #endif 97 #endif /* not lint */ 98 99 #include <sys/types.h> 100 #include <sys/stat.h> 101 #include <sys/socket.h> 102 #include <sys/time.h> 103 104 #include <netinet/in.h> 105 #include <netinet/in_systm.h> 106 #include <netinet/ip.h> 107 #include <arpa/inet.h> 108 #include <arpa/ftp.h> 109 #include <arpa/telnet.h> 110 111 #include <ctype.h> 112 #include <err.h> 113 #include <errno.h> 114 #include <fcntl.h> 115 #include <netdb.h> 116 #include <stdio.h> 117 #include <stdlib.h> 118 #include <string.h> 119 #include <time.h> 120 #include <unistd.h> 121 #include <stdarg.h> 122 123 #include "ftp_var.h" 124 125 volatile sig_atomic_t abrtflag; 126 volatile sig_atomic_t timeoutflag; 127 128 sigjmp_buf ptabort; 129 int ptabflg; 130 int ptflag = 0; 131 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 132 133 static int empty(FILE *, FILE *, int); 134 __dead static void abort_squared(int); 135 136 struct sockinet { 137 union sockunion { 138 struct sockaddr_in su_sin; 139 #ifdef INET6 140 struct sockaddr_in6 su_sin6; 141 #endif 142 } si_su; 143 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 144 int si_len; 145 #endif 146 }; 147 148 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 149 # define su_len si_len 150 #else 151 # define su_len si_su.su_sin.sin_len 152 #endif 153 #define su_family si_su.su_sin.sin_family 154 #define su_port si_su.su_sin.sin_port 155 156 struct sockinet myctladdr, hisctladdr, data_addr; 157 158 char * 159 hookup(const char *host, const char *port) 160 { 161 int s = -1, error; 162 struct addrinfo hints, *res, *res0; 163 static char hostnamebuf[MAXHOSTNAMELEN]; 164 socklen_t len; 165 int on = 1; 166 167 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 168 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 169 memset(&hints, 0, sizeof(hints)); 170 hints.ai_flags = AI_CANONNAME; 171 hints.ai_family = family; 172 hints.ai_socktype = SOCK_STREAM; 173 hints.ai_protocol = 0; 174 error = getaddrinfo(host, port, &hints, &res0); 175 if (error) { 176 warnx("Can't lookup `%s:%s': %s", host, port, 177 (error == EAI_SYSTEM) ? strerror(errno) 178 : gai_strerror(error)); 179 code = -1; 180 return (0); 181 } 182 183 if (res0->ai_canonname) 184 (void)strlcpy(hostnamebuf, res0->ai_canonname, 185 sizeof(hostnamebuf)); 186 else 187 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 188 hostname = hostnamebuf; 189 190 for (res = res0; res; res = res->ai_next) { 191 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 192 193 ai_unmapped(res); 194 if (getnameinfo(res->ai_addr, res->ai_addrlen, 195 hname, sizeof(hname), sname, sizeof(sname), 196 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 197 strlcpy(hname, "?", sizeof(hname)); 198 strlcpy(sname, "?", sizeof(sname)); 199 } 200 if (verbose && res0->ai_next) { 201 /* if we have multiple possibilities */ 202 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); 203 } 204 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 205 if (s < 0) { 206 warn("Can't create socket for connection to `%s:%s'", 207 hname, sname); 208 continue; 209 } 210 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 211 close(s); 212 s = -1; 213 continue; 214 } 215 216 /* finally we got one */ 217 break; 218 } 219 if (s < 0) { 220 warnx("Can't connect to `%s:%s'", host, port); 221 code = -1; 222 freeaddrinfo(res0); 223 return 0; 224 } 225 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 226 hisctladdr.su_len = res->ai_addrlen; 227 freeaddrinfo(res0); 228 res0 = res = NULL; 229 230 len = hisctladdr.su_len; 231 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 232 warn("Can't determine my address of connection to `%s:%s'", 233 host, port); 234 code = -1; 235 goto bad; 236 } 237 myctladdr.su_len = len; 238 239 #ifdef IPTOS_LOWDELAY 240 if (hisctladdr.su_family == AF_INET) { 241 int tos = IPTOS_LOWDELAY; 242 if (setsockopt(s, IPPROTO_IP, IP_TOS, 243 (void *)&tos, sizeof(tos)) == -1) { 244 DWARN("setsockopt %s (ignored)", 245 "IPTOS_LOWDELAY"); 246 } 247 } 248 #endif 249 cin = fdopen(s, "r"); 250 cout = fdopen(s, "w"); 251 if (cin == NULL || cout == NULL) { 252 warnx("Can't fdopen socket"); 253 if (cin) 254 (void)fclose(cin); 255 if (cout) 256 (void)fclose(cout); 257 code = -1; 258 goto bad; 259 } 260 if (verbose) 261 fprintf(ttyout, "Connected to %s.\n", hostname); 262 if (getreply(0) > 2) { /* read startup message from server */ 263 if (cin) 264 (void)fclose(cin); 265 if (cout) 266 (void)fclose(cout); 267 code = -1; 268 goto bad; 269 } 270 271 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 272 (void *)&on, sizeof(on)) == -1) { 273 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 274 } 275 276 return (hostname); 277 bad: 278 (void)close(s); 279 return (NULL); 280 } 281 282 void 283 cmdabort(int notused) 284 { 285 int oerrno = errno; 286 287 sigint_raised = 1; 288 alarmtimer(0); 289 if (fromatty) 290 write(fileno(ttyout), "\n", 1); 291 abrtflag++; 292 if (ptflag) 293 siglongjmp(ptabort, 1); 294 errno = oerrno; 295 } 296 297 void 298 cmdtimeout(int notused) 299 { 300 int oerrno = errno; 301 302 alarmtimer(0); 303 if (fromatty) 304 write(fileno(ttyout), "\n", 1); 305 timeoutflag++; 306 if (ptflag) 307 siglongjmp(ptabort, 1); 308 errno = oerrno; 309 } 310 311 /*VARARGS*/ 312 int 313 command(const char *fmt, ...) 314 { 315 va_list ap; 316 int r; 317 sigfunc oldsigint; 318 319 #ifndef NO_DEBUG 320 if (ftp_debug) { 321 fputs("---> ", ttyout); 322 va_start(ap, fmt); 323 if (strncmp("PASS ", fmt, 5) == 0) 324 fputs("PASS XXXX", ttyout); 325 else if (strncmp("ACCT ", fmt, 5) == 0) 326 fputs("ACCT XXXX", ttyout); 327 else 328 vfprintf(ttyout, fmt, ap); 329 va_end(ap); 330 putc('\n', ttyout); 331 } 332 #endif 333 if (cout == NULL) { 334 warnx("No control connection for command"); 335 code = -1; 336 return (0); 337 } 338 339 abrtflag = 0; 340 341 oldsigint = xsignal(SIGINT, cmdabort); 342 343 va_start(ap, fmt); 344 vfprintf(cout, fmt, ap); 345 va_end(ap); 346 fputs("\r\n", cout); 347 (void)fflush(cout); 348 cpend = 1; 349 r = getreply(!strcmp(fmt, "QUIT")); 350 if (abrtflag && oldsigint != SIG_IGN) 351 (*oldsigint)(SIGINT); 352 (void)xsignal(SIGINT, oldsigint); 353 return (r); 354 } 355 356 static const char *m421[] = { 357 "remote server timed out. Connection closed", 358 "user interrupt. Connection closed", 359 "remote server has closed connection", 360 }; 361 362 int 363 getreply(int expecteof) 364 { 365 char current_line[BUFSIZ]; /* last line of previous reply */ 366 int c, n, lineno; 367 int dig; 368 int originalcode = 0, continuation = 0; 369 sigfunc oldsigint, oldsigalrm; 370 int pflag = 0; 371 char *cp, *pt = pasv; 372 373 abrtflag = 0; 374 timeoutflag = 0; 375 376 oldsigint = xsignal(SIGINT, cmdabort); 377 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 378 379 for (lineno = 0 ;; lineno++) { 380 dig = n = code = 0; 381 cp = current_line; 382 while (alarmtimer(quit_time ? quit_time : 60), 383 ((c = getc(cin)) != '\n')) { 384 if (c == IAC) { /* handle telnet commands */ 385 switch (c = getc(cin)) { 386 case WILL: 387 case WONT: 388 c = getc(cin); 389 fprintf(cout, "%c%c%c", IAC, DONT, c); 390 (void)fflush(cout); 391 break; 392 case DO: 393 case DONT: 394 c = getc(cin); 395 fprintf(cout, "%c%c%c", IAC, WONT, c); 396 (void)fflush(cout); 397 break; 398 default: 399 break; 400 } 401 continue; 402 } 403 dig++; 404 if (c == EOF) { 405 /* 406 * these will get trashed by pswitch() 407 * in lostpeer() 408 */ 409 int reply_timeoutflag = timeoutflag; 410 int reply_abrtflag = abrtflag; 411 412 alarmtimer(0); 413 if (expecteof && feof(cin)) { 414 (void)xsignal(SIGINT, oldsigint); 415 (void)xsignal(SIGALRM, oldsigalrm); 416 code = 221; 417 return (0); 418 } 419 cpend = 0; 420 lostpeer(0); 421 if (verbose) { 422 size_t midx; 423 if (reply_timeoutflag) 424 midx = 0; 425 else if (reply_abrtflag) 426 midx = 1; 427 else 428 midx = 2; 429 (void)fprintf(ttyout, 430 "421 Service not available, %s.\n", m421[midx]); 431 (void)fflush(ttyout); 432 } 433 code = 421; 434 (void)xsignal(SIGINT, oldsigint); 435 (void)xsignal(SIGALRM, oldsigalrm); 436 return (4); 437 } 438 if (c != '\r' && (verbose > 0 || 439 ((verbose > -1 && n == '5' && dig > 4) && 440 (((!n && c < '5') || (n && n < '5')) 441 || !retry_connect)))) { 442 if (proxflag && 443 (dig == 1 || (dig == 5 && verbose == 0))) 444 fprintf(ttyout, "%s:", hostname); 445 (void)putc(c, ttyout); 446 } 447 if (dig < 4 && isdigit(c)) 448 code = code * 10 + (c - '0'); 449 if (!pflag && (code == 227 || code == 228)) 450 pflag = 1; 451 else if (!pflag && code == 229) 452 pflag = 100; 453 if (dig > 4 && pflag == 1 && isdigit(c)) 454 pflag = 2; 455 if (pflag == 2) { 456 if (c != '\r' && c != ')') { 457 if (pt < &pasv[sizeof(pasv) - 1]) 458 *pt++ = c; 459 } else { 460 *pt = '\0'; 461 pflag = 3; 462 } 463 } 464 if (pflag == 100 && c == '(') 465 pflag = 2; 466 if (dig == 4 && c == '-') { 467 if (continuation) 468 code = 0; 469 continuation++; 470 } 471 if (n == 0) 472 n = c; 473 if (cp < ¤t_line[sizeof(current_line) - 1]) 474 *cp++ = c; 475 } 476 if (verbose > 0 || ((verbose > -1 && n == '5') && 477 (n < '5' || !retry_connect))) { 478 (void)putc(c, ttyout); 479 (void)fflush(ttyout); 480 } 481 if (cp[-1] == '\r') 482 cp[-1] = '\0'; 483 *cp = '\0'; 484 if (lineno == 0) 485 (void)strlcpy(reply_string, current_line, 486 sizeof(reply_string)); 487 if (lineno > 0 && code == 0 && reply_callback != NULL) 488 (*reply_callback)(current_line); 489 if (continuation && code != originalcode) { 490 if (originalcode == 0) 491 originalcode = code; 492 continue; 493 } 494 if (n != '1') 495 cpend = 0; 496 alarmtimer(0); 497 (void)xsignal(SIGINT, oldsigint); 498 (void)xsignal(SIGALRM, oldsigalrm); 499 if (code == 421 || originalcode == 421) 500 lostpeer(0); 501 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 502 (*oldsigint)(SIGINT); 503 if (timeoutflag && oldsigalrm != cmdtimeout && 504 oldsigalrm != SIG_IGN) 505 (*oldsigalrm)(SIGINT); 506 return (n - '0'); 507 } 508 } 509 510 static int 511 empty(FILE *ecin, FILE *din, int sec) 512 { 513 int nr, nfd; 514 struct pollfd pfd[2]; 515 516 nfd = 0; 517 if (ecin) { 518 pfd[nfd].fd = fileno(ecin); 519 pfd[nfd++].events = POLLIN; 520 } 521 522 if (din) { 523 pfd[nfd].fd = fileno(din); 524 pfd[nfd++].events = POLLIN; 525 } 526 527 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 528 return nr; 529 530 nr = 0; 531 nfd = 0; 532 if (ecin) 533 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 534 if (din) 535 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 536 return nr; 537 } 538 539 sigjmp_buf xferabort; 540 541 __dead static void 542 abortxfer(int notused) 543 { 544 char msgbuf[100]; 545 size_t len; 546 547 sigint_raised = 1; 548 alarmtimer(0); 549 mflag = 0; 550 abrtflag = 0; 551 switch (direction[0]) { 552 case 'r': 553 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 554 break; 555 case 's': 556 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 557 break; 558 default: 559 errx(1, "abortxfer: unknown direction `%s'", direction); 560 } 561 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 562 sizeof(msgbuf)); 563 write(fileno(ttyout), msgbuf, len); 564 siglongjmp(xferabort, 1); 565 } 566 567 /* 568 * Read data from infd & write to outfd, using buf/bufsize as the temporary 569 * buffer, dealing with short writes. 570 * If rate_limit != 0, rate-limit the transfer. 571 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 572 * Updates global variables: bytes. 573 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 574 * In the case of error, errno contains the appropriate error code. 575 */ 576 static int 577 copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 578 int rate_limit, int hash_interval) 579 { 580 volatile off_t hashc; 581 ssize_t inc, outc; 582 char *bufp; 583 struct timeval tvthen, tvnow, tvdiff; 584 off_t bufrem, bufchunk; 585 int serr; 586 587 hashc = hash_interval; 588 if (rate_limit) 589 bufchunk = rate_limit; 590 else 591 bufchunk = bufsize; 592 593 while (1) { 594 if (rate_limit) { 595 (void)gettimeofday(&tvthen, NULL); 596 } 597 errno = 0; 598 inc = outc = 0; 599 /* copy bufchunk at a time */ 600 bufrem = bufchunk; 601 while (bufrem > 0) { 602 inc = read(infd, buf, MIN((off_t)bufsize, bufrem)); 603 if (inc <= 0) 604 goto copy_done; 605 bytes += inc; 606 bufrem -= inc; 607 bufp = buf; 608 while (inc > 0) { 609 outc = write(outfd, bufp, inc); 610 if (outc < 0) 611 goto copy_done; 612 inc -= outc; 613 bufp += outc; 614 } 615 if (hash_interval) { 616 while (bytes >= hashc) { 617 (void)putc('#', ttyout); 618 hashc += hash_interval; 619 } 620 (void)fflush(ttyout); 621 } 622 } 623 if (rate_limit) { /* rate limited; wait if necessary */ 624 while (1) { 625 (void)gettimeofday(&tvnow, NULL); 626 timersub(&tvnow, &tvthen, &tvdiff); 627 if (tvdiff.tv_sec > 0) 628 break; 629 usleep(1000000 - tvdiff.tv_usec); 630 } 631 } 632 } 633 634 copy_done: 635 serr = errno; 636 if (hash_interval && bytes > 0) { 637 if (bytes < hash_interval) 638 (void)putc('#', ttyout); 639 (void)putc('\n', ttyout); 640 (void)fflush(ttyout); 641 } 642 errno = serr; 643 if (inc == -1) 644 return 1; 645 if (outc == -1) 646 return 2; 647 648 return 0; 649 } 650 651 void 652 sendrequest(const char *cmd, const char *local, const char *remote, 653 int printnames) 654 { 655 struct stat st; 656 int c; 657 FILE *volatile fin; 658 FILE *volatile dout; 659 int (*volatile closefunc)(FILE *); 660 sigfunc volatile oldintr; 661 sigfunc volatile oldintp; 662 off_t volatile hashbytes; 663 int hash_interval; 664 const char *lmode; 665 static size_t bufsize; 666 static char *buf; 667 int oprogress; 668 669 hashbytes = mark; 670 direction = "sent"; 671 dout = NULL; 672 bytes = 0; 673 filesize = -1; 674 oprogress = progress; 675 if (verbose && printnames) { 676 if (*local != '-') 677 fprintf(ttyout, "local: %s ", local); 678 if (remote) 679 fprintf(ttyout, "remote: %s\n", remote); 680 } 681 if (proxy) { 682 proxtrans(cmd, local, remote); 683 return; 684 } 685 if (curtype != type) 686 changetype(type, 0); 687 closefunc = NULL; 688 oldintr = NULL; 689 oldintp = NULL; 690 lmode = "w"; 691 if (sigsetjmp(xferabort, 1)) { 692 while (cpend) 693 (void)getreply(0); 694 code = -1; 695 goto cleanupsend; 696 } 697 (void)xsignal(SIGQUIT, psummary); 698 oldintr = xsignal(SIGINT, abortxfer); 699 if (strcmp(local, "-") == 0) { 700 fin = stdin; 701 progress = 0; 702 } else if (*local == '|') { 703 oldintp = xsignal(SIGPIPE, SIG_IGN); 704 fin = popen(local + 1, "r"); 705 if (fin == NULL) { 706 warn("Can't execute `%s'", local + 1); 707 code = -1; 708 goto cleanupsend; 709 } 710 progress = 0; 711 closefunc = pclose; 712 } else { 713 fin = fopen(local, "r"); 714 if (fin == NULL) { 715 warn("Can't open `%s'", local); 716 code = -1; 717 goto cleanupsend; 718 } 719 closefunc = fclose; 720 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 721 fprintf(ttyout, "%s: not a plain file.\n", local); 722 code = -1; 723 goto cleanupsend; 724 } 725 filesize = st.st_size; 726 } 727 if (initconn()) { 728 code = -1; 729 goto cleanupsend; 730 } 731 if (sigsetjmp(xferabort, 1)) 732 goto abort; 733 734 if (restart_point && 735 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 736 int rc; 737 738 rc = -1; 739 switch (curtype) { 740 case TYPE_A: 741 rc = fseeko(fin, restart_point, SEEK_SET); 742 break; 743 case TYPE_I: 744 case TYPE_L: 745 rc = lseek(fileno(fin), restart_point, SEEK_SET); 746 break; 747 } 748 if (rc < 0) { 749 warn("Can't seek to restart `%s'", local); 750 goto cleanupsend; 751 } 752 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 753 goto cleanupsend; 754 lmode = "r+"; 755 } 756 if (remote) { 757 if (command("%s %s", cmd, remote) != PRELIM) 758 goto cleanupsend; 759 } else { 760 if (command("%s", cmd) != PRELIM) 761 goto cleanupsend; 762 } 763 dirchange = 1; 764 dout = dataconn(lmode); 765 if (dout == NULL) 766 goto abort; 767 768 if ((size_t)sndbuf_size > bufsize) { 769 if (buf) 770 (void)free(buf); 771 bufsize = sndbuf_size; 772 buf = ftp_malloc(bufsize); 773 } 774 775 progressmeter(-1); 776 oldintp = xsignal(SIGPIPE, SIG_IGN); 777 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 778 779 switch (curtype) { 780 781 case TYPE_I: 782 case TYPE_L: 783 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 784 rate_put, hash_interval); 785 if (c == 1) { 786 warn("Reading `%s'", local); 787 } else if (c == 2) { 788 if (errno != EPIPE) 789 warn("Writing to network"); 790 bytes = -1; 791 } 792 break; 793 794 case TYPE_A: 795 while ((c = getc(fin)) != EOF) { 796 if (c == '\n') { 797 while (hash_interval && bytes >= hashbytes) { 798 (void)putc('#', ttyout); 799 (void)fflush(ttyout); 800 hashbytes += mark; 801 } 802 if (ferror(dout)) 803 break; 804 (void)putc('\r', dout); 805 bytes++; 806 } 807 (void)putc(c, dout); 808 bytes++; 809 #if 0 /* this violates RFC 959 */ 810 if (c == '\r') { 811 (void)putc('\0', dout); 812 bytes++; 813 } 814 #endif 815 } 816 if (hash_interval) { 817 if (bytes < hashbytes) 818 (void)putc('#', ttyout); 819 (void)putc('\n', ttyout); 820 } 821 if (ferror(fin)) 822 warn("Reading `%s'", local); 823 if (ferror(dout)) { 824 if (errno != EPIPE) 825 warn("Writing to network"); 826 bytes = -1; 827 } 828 break; 829 } 830 831 progressmeter(1); 832 if (closefunc != NULL) { 833 (*closefunc)(fin); 834 fin = NULL; 835 } 836 (void)fclose(dout); 837 dout = NULL; 838 (void)getreply(0); 839 if (bytes > 0) 840 ptransfer(0); 841 goto cleanupsend; 842 843 abort: 844 (void)xsignal(SIGINT, oldintr); 845 oldintr = NULL; 846 if (!cpend) { 847 code = -1; 848 goto cleanupsend; 849 } 850 if (data >= 0) { 851 (void)close(data); 852 data = -1; 853 } 854 if (dout) { 855 (void)fclose(dout); 856 dout = NULL; 857 } 858 (void)getreply(0); 859 code = -1; 860 if (bytes > 0) 861 ptransfer(0); 862 863 cleanupsend: 864 if (oldintr) 865 (void)xsignal(SIGINT, oldintr); 866 if (oldintp) 867 (void)xsignal(SIGPIPE, oldintp); 868 if (data >= 0) { 869 (void)close(data); 870 data = -1; 871 } 872 if (closefunc != NULL && fin != NULL) 873 (*closefunc)(fin); 874 if (dout) 875 (void)fclose(dout); 876 progress = oprogress; 877 restart_point = 0; 878 bytes = 0; 879 } 880 881 void 882 recvrequest(const char *cmd, const char *volatile local, const char *remote, 883 const char *lmode, int printnames, int ignorespecial) 884 { 885 FILE *volatile fout; 886 FILE *volatile din; 887 int (*volatile closefunc)(FILE *); 888 sigfunc volatile oldintr; 889 sigfunc volatile oldintp; 890 int c, d; 891 int volatile is_retr; 892 int volatile tcrflag; 893 int volatile bare_lfs; 894 static size_t bufsize; 895 static char *buf; 896 off_t volatile hashbytes; 897 int hash_interval; 898 struct stat st; 899 time_t mtime; 900 struct timeval tval[2]; 901 int oprogress; 902 int opreserve; 903 904 fout = NULL; 905 din = NULL; 906 hashbytes = mark; 907 direction = "received"; 908 bytes = 0; 909 bare_lfs = 0; 910 filesize = -1; 911 oprogress = progress; 912 opreserve = preserve; 913 is_retr = (strcmp(cmd, "RETR") == 0); 914 if (is_retr && verbose && printnames) { 915 if (ignorespecial || *local != '-') 916 fprintf(ttyout, "local: %s ", local); 917 if (remote) 918 fprintf(ttyout, "remote: %s\n", remote); 919 } 920 if (proxy && is_retr) { 921 proxtrans(cmd, local, remote); 922 return; 923 } 924 closefunc = NULL; 925 oldintr = NULL; 926 oldintp = NULL; 927 tcrflag = !crflag && is_retr; 928 if (sigsetjmp(xferabort, 1)) { 929 while (cpend) 930 (void)getreply(0); 931 code = -1; 932 goto cleanuprecv; 933 } 934 (void)xsignal(SIGQUIT, psummary); 935 oldintr = xsignal(SIGINT, abortxfer); 936 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 937 if (access(local, W_OK) < 0) { 938 char *dir = strrchr(local, '/'); 939 940 if (errno != ENOENT && errno != EACCES) { 941 warn("Can't access `%s'", local); 942 code = -1; 943 goto cleanuprecv; 944 } 945 if (dir != NULL) 946 *dir = 0; 947 d = access(dir == local ? "/" : 948 dir ? local : ".", W_OK); 949 if (dir != NULL) 950 *dir = '/'; 951 if (d < 0) { 952 warn("Can't access `%s'", local); 953 code = -1; 954 goto cleanuprecv; 955 } 956 if (!runique && errno == EACCES && 957 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 958 warn("Can't chmod `%s'", local); 959 code = -1; 960 goto cleanuprecv; 961 } 962 if (runique && errno == EACCES && 963 (local = gunique(local)) == NULL) { 964 code = -1; 965 goto cleanuprecv; 966 } 967 } 968 else if (runique && (local = gunique(local)) == NULL) { 969 code = -1; 970 goto cleanuprecv; 971 } 972 } 973 if (!is_retr) { 974 if (curtype != TYPE_A) 975 changetype(TYPE_A, 0); 976 } else { 977 if (curtype != type) 978 changetype(type, 0); 979 filesize = remotesize(remote, 0); 980 if (code == 421 || code == -1) 981 goto cleanuprecv; 982 } 983 if (initconn()) { 984 code = -1; 985 goto cleanuprecv; 986 } 987 if (sigsetjmp(xferabort, 1)) 988 goto abort; 989 if (is_retr && restart_point && 990 command("REST " LLF, (LLT) restart_point) != CONTINUE) 991 goto cleanuprecv; 992 if (! EMPTYSTRING(remote)) { 993 if (command("%s %s", cmd, remote) != PRELIM) 994 goto cleanuprecv; 995 } else { 996 if (command("%s", cmd) != PRELIM) 997 goto cleanuprecv; 998 } 999 din = dataconn("r"); 1000 if (din == NULL) 1001 goto abort; 1002 if (!ignorespecial && strcmp(local, "-") == 0) { 1003 fout = stdout; 1004 progress = 0; 1005 preserve = 0; 1006 } else if (!ignorespecial && *local == '|') { 1007 oldintp = xsignal(SIGPIPE, SIG_IGN); 1008 fout = popen(local + 1, "w"); 1009 if (fout == NULL) { 1010 warn("Can't execute `%s'", local+1); 1011 goto abort; 1012 } 1013 progress = 0; 1014 preserve = 0; 1015 closefunc = pclose; 1016 } else { 1017 fout = fopen(local, lmode); 1018 if (fout == NULL) { 1019 warn("Can't open `%s'", local); 1020 goto abort; 1021 } 1022 closefunc = fclose; 1023 } 1024 1025 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1026 progress = 0; 1027 preserve = 0; 1028 } 1029 if ((size_t)rcvbuf_size > bufsize) { 1030 if (buf) 1031 (void)free(buf); 1032 bufsize = rcvbuf_size; 1033 buf = ftp_malloc(bufsize); 1034 } 1035 1036 progressmeter(-1); 1037 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1038 1039 switch (curtype) { 1040 1041 case TYPE_I: 1042 case TYPE_L: 1043 if (is_retr && restart_point && 1044 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1045 warn("Can't seek to restart `%s'", local); 1046 goto cleanuprecv; 1047 } 1048 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1049 rate_get, hash_interval); 1050 if (c == 1) { 1051 if (errno != EPIPE) 1052 warn("Reading from network"); 1053 bytes = -1; 1054 } else if (c == 2) { 1055 warn("Writing `%s'", local); 1056 } 1057 break; 1058 1059 case TYPE_A: 1060 if (is_retr && restart_point) { 1061 int ch; 1062 off_t i; 1063 1064 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1065 goto done; 1066 for (i = 0; i++ < restart_point;) { 1067 if ((ch = getc(fout)) == EOF) 1068 goto done; 1069 if (ch == '\n') 1070 i++; 1071 } 1072 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1073 done: 1074 warn("Can't seek to restart `%s'", local); 1075 goto cleanuprecv; 1076 } 1077 } 1078 while ((c = getc(din)) != EOF) { 1079 if (c == '\n') 1080 bare_lfs++; 1081 while (c == '\r') { 1082 while (hash_interval && bytes >= hashbytes) { 1083 (void)putc('#', ttyout); 1084 (void)fflush(ttyout); 1085 hashbytes += mark; 1086 } 1087 bytes++; 1088 if ((c = getc(din)) != '\n' || tcrflag) { 1089 if (ferror(fout)) 1090 goto break2; 1091 (void)putc('\r', fout); 1092 if (c == '\0') { 1093 bytes++; 1094 goto contin2; 1095 } 1096 if (c == EOF) 1097 goto contin2; 1098 } 1099 } 1100 (void)putc(c, fout); 1101 bytes++; 1102 contin2: ; 1103 } 1104 break2: 1105 if (hash_interval) { 1106 if (bytes < hashbytes) 1107 (void)putc('#', ttyout); 1108 (void)putc('\n', ttyout); 1109 } 1110 if (ferror(din)) { 1111 if (errno != EPIPE) 1112 warn("Reading from network"); 1113 bytes = -1; 1114 } 1115 if (ferror(fout)) 1116 warn("Writing `%s'", local); 1117 break; 1118 } 1119 1120 progressmeter(1); 1121 if (closefunc != NULL) { 1122 (*closefunc)(fout); 1123 fout = NULL; 1124 } 1125 (void)fclose(din); 1126 din = NULL; 1127 (void)getreply(0); 1128 if (bare_lfs) { 1129 fprintf(ttyout, 1130 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1131 bare_lfs); 1132 fputs("File may not have transferred correctly.\n", ttyout); 1133 } 1134 if (bytes >= 0 && is_retr) { 1135 if (bytes > 0) 1136 ptransfer(0); 1137 if (preserve && (closefunc == fclose)) { 1138 mtime = remotemodtime(remote, 0); 1139 if (mtime != -1) { 1140 (void)gettimeofday(&tval[0], NULL); 1141 tval[1].tv_sec = mtime; 1142 tval[1].tv_usec = 0; 1143 if (utimes(local, tval) == -1) { 1144 fprintf(ttyout, 1145 "Can't change modification time on %s to %s", 1146 local, 1147 rfc2822time(localtime(&mtime))); 1148 } 1149 } 1150 } 1151 } 1152 goto cleanuprecv; 1153 1154 abort: 1155 /* 1156 * abort using RFC 959 recommended IP,SYNC sequence 1157 */ 1158 if (! sigsetjmp(xferabort, 1)) { 1159 /* this is the first call */ 1160 (void)xsignal(SIGINT, abort_squared); 1161 if (!cpend) { 1162 code = -1; 1163 goto cleanuprecv; 1164 } 1165 abort_remote(din); 1166 } 1167 code = -1; 1168 if (bytes > 0) 1169 ptransfer(0); 1170 1171 cleanuprecv: 1172 if (oldintr) 1173 (void)xsignal(SIGINT, oldintr); 1174 if (oldintp) 1175 (void)xsignal(SIGPIPE, oldintp); 1176 if (data >= 0) { 1177 (void)close(data); 1178 data = -1; 1179 } 1180 if (closefunc != NULL && fout != NULL) 1181 (*closefunc)(fout); 1182 if (din) 1183 (void)fclose(din); 1184 progress = oprogress; 1185 preserve = opreserve; 1186 bytes = 0; 1187 } 1188 1189 /* 1190 * Need to start a listen on the data channel before we send the command, 1191 * otherwise the server's connect may fail. 1192 */ 1193 int 1194 initconn(void) 1195 { 1196 char *p, *a; 1197 int result, tmpno = 0; 1198 int on = 1; 1199 int error; 1200 unsigned int addr[16], port[2]; 1201 unsigned int af, hal, pal; 1202 socklen_t len; 1203 const char *pasvcmd = NULL; 1204 int overbose; 1205 1206 #ifdef INET6 1207 #ifndef NO_DEBUG 1208 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1209 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1210 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1211 warnx("Use of scoped addresses can be troublesome"); 1212 } 1213 #endif 1214 #endif 1215 1216 reinit: 1217 if (passivemode) { 1218 data_addr = myctladdr; 1219 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1220 if (data < 0) { 1221 warn("Can't create socket for data connection"); 1222 return (1); 1223 } 1224 if ((options & SO_DEBUG) && 1225 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1226 (void *)&on, sizeof(on)) == -1) { 1227 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1228 } 1229 result = COMPLETE + 1; 1230 switch (data_addr.su_family) { 1231 case AF_INET: 1232 if (epsv4 && !epsv4bad) { 1233 pasvcmd = "EPSV"; 1234 overbose = verbose; 1235 if (ftp_debug == 0) 1236 verbose = -1; 1237 result = command("EPSV"); 1238 verbose = overbose; 1239 if (verbose > 0 && 1240 (result == COMPLETE || !connected)) 1241 fprintf(ttyout, "%s\n", reply_string); 1242 if (!connected) 1243 return (1); 1244 /* 1245 * this code is to be friendly with broken 1246 * BSDI ftpd 1247 */ 1248 if (code / 10 == 22 && code != 229) { 1249 fputs( 1250 "wrong server: return code must be 229\n", 1251 ttyout); 1252 result = COMPLETE + 1; 1253 } 1254 if (result != COMPLETE) { 1255 epsv4bad = 1; 1256 DPRINTF("disabling epsv4 for this " 1257 "connection\n"); 1258 } 1259 } 1260 if (result != COMPLETE) { 1261 pasvcmd = "PASV"; 1262 result = command("PASV"); 1263 if (!connected) 1264 return (1); 1265 } 1266 break; 1267 #ifdef INET6 1268 case AF_INET6: 1269 if (epsv6 && !epsv6bad) { 1270 pasvcmd = "EPSV"; 1271 overbose = verbose; 1272 if (ftp_debug == 0) 1273 verbose = -1; 1274 result = command("EPSV"); 1275 verbose = overbose; 1276 if (verbose > 0 && 1277 (result == COMPLETE || !connected)) 1278 fprintf(ttyout, "%s\n", reply_string); 1279 if (!connected) 1280 return (1); 1281 /* 1282 * this code is to be friendly with 1283 * broken BSDI ftpd 1284 */ 1285 if (code / 10 == 22 && code != 229) { 1286 fputs( 1287 "wrong server: return code must be 229\n", 1288 ttyout); 1289 result = COMPLETE + 1; 1290 } 1291 if (result != COMPLETE) { 1292 epsv6bad = 1; 1293 DPRINTF("disabling epsv6 for this " 1294 "connection\n"); 1295 } 1296 } 1297 if (result != COMPLETE) { 1298 pasvcmd = "LPSV"; 1299 result = command("LPSV"); 1300 } 1301 if (!connected) 1302 return (1); 1303 break; 1304 #endif 1305 default: 1306 result = COMPLETE + 1; 1307 break; 1308 } 1309 if (result != COMPLETE) { 1310 if (activefallback) { 1311 (void)close(data); 1312 data = -1; 1313 passivemode = 0; 1314 #if 0 1315 activefallback = 0; 1316 #endif 1317 goto reinit; 1318 } 1319 fputs("Passive mode refused.\n", ttyout); 1320 goto bad; 1321 } 1322 1323 #define pack2(var, off) \ 1324 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1325 #define pack4(var, off) \ 1326 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1327 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1328 #define UC(b) (((int)b)&0xff) 1329 1330 /* 1331 * What we've got at this point is a string of comma separated 1332 * one-byte unsigned integer values, separated by commas. 1333 */ 1334 if (strcmp(pasvcmd, "PASV") == 0) { 1335 if (data_addr.su_family != AF_INET) { 1336 fputs( 1337 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1338 error = 1; 1339 goto bad; 1340 } 1341 if (code / 10 == 22 && code != 227) { 1342 fputs("wrong server: return code must be 227\n", 1343 ttyout); 1344 error = 1; 1345 goto bad; 1346 } 1347 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1348 &addr[0], &addr[1], &addr[2], &addr[3], 1349 &port[0], &port[1]); 1350 if (error != 6) { 1351 fputs( 1352 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1353 error = 1; 1354 goto bad; 1355 } 1356 error = 0; 1357 memset(&data_addr, 0, sizeof(data_addr)); 1358 data_addr.su_family = AF_INET; 1359 data_addr.su_len = sizeof(struct sockaddr_in); 1360 data_addr.si_su.su_sin.sin_addr.s_addr = 1361 htonl(pack4(addr, 0)); 1362 data_addr.su_port = htons(pack2(port, 0)); 1363 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1364 if (code / 10 == 22 && code != 228) { 1365 fputs("wrong server: return code must be 228\n", 1366 ttyout); 1367 error = 1; 1368 goto bad; 1369 } 1370 switch (data_addr.su_family) { 1371 case AF_INET: 1372 error = sscanf(pasv, 1373 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1374 &af, &hal, 1375 &addr[0], &addr[1], &addr[2], &addr[3], 1376 &pal, &port[0], &port[1]); 1377 if (error != 9) { 1378 fputs( 1379 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1380 error = 1; 1381 goto bad; 1382 } 1383 if (af != 4 || hal != 4 || pal != 2) { 1384 fputs( 1385 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1386 error = 1; 1387 goto bad; 1388 } 1389 1390 error = 0; 1391 memset(&data_addr, 0, sizeof(data_addr)); 1392 data_addr.su_family = AF_INET; 1393 data_addr.su_len = sizeof(struct sockaddr_in); 1394 data_addr.si_su.su_sin.sin_addr.s_addr = 1395 htonl(pack4(addr, 0)); 1396 data_addr.su_port = htons(pack2(port, 0)); 1397 break; 1398 #ifdef INET6 1399 case AF_INET6: 1400 error = sscanf(pasv, 1401 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1402 &af, &hal, 1403 &addr[0], &addr[1], &addr[2], &addr[3], 1404 &addr[4], &addr[5], &addr[6], &addr[7], 1405 &addr[8], &addr[9], &addr[10], 1406 &addr[11], &addr[12], &addr[13], 1407 &addr[14], &addr[15], 1408 &pal, &port[0], &port[1]); 1409 if (error != 21) { 1410 fputs( 1411 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1412 error = 1; 1413 goto bad; 1414 } 1415 if (af != 6 || hal != 16 || pal != 2) { 1416 fputs( 1417 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1418 error = 1; 1419 goto bad; 1420 } 1421 1422 error = 0; 1423 memset(&data_addr, 0, sizeof(data_addr)); 1424 data_addr.su_family = AF_INET6; 1425 data_addr.su_len = sizeof(struct sockaddr_in6); 1426 { 1427 size_t i; 1428 for (i = 0; i < sizeof(struct in6_addr); i++) { 1429 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1430 UC(addr[i]); 1431 } 1432 } 1433 data_addr.su_port = htons(pack2(port, 0)); 1434 break; 1435 #endif 1436 default: 1437 error = 1; 1438 } 1439 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1440 char delim[4]; 1441 1442 port[0] = 0; 1443 if (code / 10 == 22 && code != 229) { 1444 fputs("wrong server: return code must be 229\n", 1445 ttyout); 1446 error = 1; 1447 goto bad; 1448 } 1449 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1450 &delim[1], &delim[2], &port[1], 1451 &delim[3]) != 5) { 1452 fputs("parse error!\n", ttyout); 1453 error = 1; 1454 goto bad; 1455 } 1456 if (delim[0] != delim[1] || delim[0] != delim[2] 1457 || delim[0] != delim[3]) { 1458 fputs("parse error!\n", ttyout); 1459 error = 1; 1460 goto bad; 1461 } 1462 data_addr = hisctladdr; 1463 data_addr.su_port = htons(port[1]); 1464 } else 1465 goto bad; 1466 1467 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1468 data_addr.su_len) < 0) { 1469 if (activefallback) { 1470 (void)close(data); 1471 data = -1; 1472 passivemode = 0; 1473 #if 0 1474 activefallback = 0; 1475 #endif 1476 goto reinit; 1477 } 1478 goto bad; 1479 } 1480 #ifdef IPTOS_THROUGHPUT 1481 if (data_addr.su_family == AF_INET) { 1482 on = IPTOS_THROUGHPUT; 1483 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1484 (void *)&on, sizeof(on)) == -1) { 1485 DWARN("setsockopt %s (ignored)", 1486 "IPTOS_THROUGHPUT"); 1487 } 1488 } 1489 #endif 1490 return (0); 1491 } 1492 1493 noport: 1494 data_addr = myctladdr; 1495 if (sendport) 1496 data_addr.su_port = 0; /* let system pick one */ 1497 if (data != -1) 1498 (void)close(data); 1499 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1500 if (data < 0) { 1501 warn("Can't create socket for data connection"); 1502 if (tmpno) 1503 sendport = 1; 1504 return (1); 1505 } 1506 if (!sendport) 1507 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1508 (void *)&on, sizeof(on)) == -1) { 1509 warn("Can't set SO_REUSEADDR on data connection"); 1510 goto bad; 1511 } 1512 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1513 data_addr.su_len) < 0) { 1514 warn("Can't bind for data connection"); 1515 goto bad; 1516 } 1517 if ((options & SO_DEBUG) && 1518 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1519 (void *)&on, sizeof(on)) == -1) { 1520 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1521 } 1522 len = sizeof(data_addr.si_su); 1523 memset((char *)&data_addr, 0, sizeof (data_addr)); 1524 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1525 warn("Can't determine my address of data connection"); 1526 goto bad; 1527 } 1528 data_addr.su_len = len; 1529 if (ftp_listen(data, 1) < 0) 1530 warn("Can't listen to data connection"); 1531 1532 if (sendport) { 1533 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1534 struct sockinet tmp; 1535 1536 switch (data_addr.su_family) { 1537 case AF_INET: 1538 if (!epsv4 || epsv4bad) { 1539 result = COMPLETE + 1; 1540 break; 1541 } 1542 /* FALLTHROUGH */ 1543 #ifdef INET6 1544 case AF_INET6: 1545 if (!epsv6 || epsv6bad) { 1546 result = COMPLETE + 1; 1547 break; 1548 } 1549 #endif 1550 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1551 tmp = data_addr; 1552 #ifdef INET6 1553 if (tmp.su_family == AF_INET6) 1554 tmp.si_su.su_sin6.sin6_scope_id = 0; 1555 #endif 1556 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1557 tmp.su_len, hname, sizeof(hname), sname, 1558 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1559 result = ERROR; 1560 } else { 1561 overbose = verbose; 1562 if (ftp_debug == 0) 1563 verbose = -1; 1564 result = command("EPRT |%u|%s|%s|", af, hname, 1565 sname); 1566 verbose = overbose; 1567 if (verbose > 0 && 1568 (result == COMPLETE || !connected)) 1569 fprintf(ttyout, "%s\n", reply_string); 1570 if (!connected) 1571 return (1); 1572 if (result != COMPLETE) { 1573 epsv4bad = 1; 1574 DPRINTF("disabling epsv4 for this " 1575 "connection\n"); 1576 } 1577 } 1578 break; 1579 default: 1580 result = COMPLETE + 1; 1581 break; 1582 } 1583 if (result == COMPLETE) 1584 goto skip_port; 1585 1586 switch (data_addr.su_family) { 1587 case AF_INET: 1588 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1589 p = (char *)&data_addr.su_port; 1590 result = command("PORT %d,%d,%d,%d,%d,%d", 1591 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1592 UC(p[0]), UC(p[1])); 1593 break; 1594 #ifdef INET6 1595 case AF_INET6: { 1596 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)]; 1597 uint8_t up[sizeof(data_addr.su_port)]; 1598 1599 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr, 1600 sizeof(ua)); 1601 memcpy(up, &data_addr.su_port, sizeof(up)); 1602 1603 result = command( 1604 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1605 6, 16, 1606 ua[0], ua[1], ua[2], ua[3], 1607 ua[4], ua[5], ua[6], ua[7], 1608 ua[8], ua[9], ua[10], ua[11], 1609 ua[12], ua[13], ua[14], ua[15], 1610 2, 1611 up[0], up[1]); 1612 break; 1613 } 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 1649 FILE * 1650 dataconn(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 1725 void 1726 psabort(int notused) 1727 { 1728 int oerrno = errno; 1729 1730 sigint_raised = 1; 1731 alarmtimer(0); 1732 abrtflag++; 1733 errno = oerrno; 1734 } 1735 1736 void 1737 pswitch(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 1823 __dead static void 1824 abortpt(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 1837 void 1838 proxtrans(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 1963 void 1964 reset(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 1983 char * 1984 gunique(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 */ 2035 static void 2036 abort_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 2050 void 2051 abort_remote(FILE *din) 2052 { 2053 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 */ 2110 void 2111 ai_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 2144 void 2145 xusage(void) 2146 { 2147 fputs("Usage error\n", ttyout); 2148 } 2149 #endif 2150