1 /* $NetBSD: ftp.c,v 1.154 2008/04/22 12:59:33 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1985, 1989, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Copyright (C) 1997 and 1998 WIDE Project. 70 * All rights reserved. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. Neither the name of the project nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97 #include <sys/cdefs.h> 98 #ifndef lint 99 #if 0 100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101 #else 102 __RCSID("$NetBSD: ftp.c,v 1.154 2008/04/22 12:59:33 lukem Exp $"); 103 #endif 104 #endif /* not lint */ 105 106 #include <sys/types.h> 107 #include <sys/stat.h> 108 #include <sys/socket.h> 109 #include <sys/time.h> 110 111 #include <netinet/in.h> 112 #include <netinet/in_systm.h> 113 #include <netinet/ip.h> 114 #include <arpa/inet.h> 115 #include <arpa/ftp.h> 116 #include <arpa/telnet.h> 117 118 #include <ctype.h> 119 #include <err.h> 120 #include <errno.h> 121 #include <fcntl.h> 122 #include <netdb.h> 123 #include <stdio.h> 124 #include <stdlib.h> 125 #include <string.h> 126 #include <time.h> 127 #include <unistd.h> 128 #include <stdarg.h> 129 130 #include "ftp_var.h" 131 132 volatile sig_atomic_t abrtflag; 133 volatile sig_atomic_t timeoutflag; 134 135 sigjmp_buf ptabort; 136 int ptabflg; 137 int ptflag = 0; 138 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 139 140 static int empty(FILE *, FILE *, int); 141 142 struct sockinet { 143 union sockunion { 144 struct sockaddr_in su_sin; 145 #ifdef INET6 146 struct sockaddr_in6 su_sin6; 147 #endif 148 } si_su; 149 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 150 int si_len; 151 #endif 152 }; 153 154 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 155 # define su_len si_len 156 #else 157 # define su_len si_su.su_sin.sin_len 158 #endif 159 #define su_family si_su.su_sin.sin_family 160 #define su_port si_su.su_sin.sin_port 161 162 struct sockinet myctladdr, hisctladdr, data_addr; 163 164 char * 165 hookup(char *host, char *port) 166 { 167 int s = -1, error; 168 struct addrinfo hints, *res, *res0; 169 static char hostnamebuf[MAXHOSTNAMELEN]; 170 socklen_t len; 171 int on = 1; 172 173 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 174 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 175 memset(&hints, 0, sizeof(hints)); 176 hints.ai_flags = AI_CANONNAME; 177 hints.ai_family = family; 178 hints.ai_socktype = SOCK_STREAM; 179 hints.ai_protocol = 0; 180 error = getaddrinfo(host, port, &hints, &res0); 181 if (error) { 182 warnx("Can't lookup `%s:%s': %s", host, port, 183 (error == EAI_SYSTEM) ? strerror(errno) 184 : gai_strerror(error)); 185 code = -1; 186 return (0); 187 } 188 189 if (res0->ai_canonname) 190 (void)strlcpy(hostnamebuf, res0->ai_canonname, 191 sizeof(hostnamebuf)); 192 else 193 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 194 hostname = hostnamebuf; 195 196 for (res = res0; res; res = res->ai_next) { 197 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 198 199 ai_unmapped(res); 200 if (getnameinfo(res->ai_addr, res->ai_addrlen, 201 hname, sizeof(hname), sname, sizeof(sname), 202 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 203 strlcpy(hname, "?", sizeof(hname)); 204 strlcpy(sname, "?", sizeof(sname)); 205 } 206 if (verbose && res0->ai_next) { 207 /* if we have multiple possibilities */ 208 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); 209 } 210 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 211 if (s < 0) { 212 warn("Can't create socket for connection to `%s:%s'", 213 hname, sname); 214 continue; 215 } 216 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 217 close(s); 218 s = -1; 219 continue; 220 } 221 222 /* finally we got one */ 223 break; 224 } 225 if (s < 0) { 226 warnx("Can't connect to `%s:%s'", host, port); 227 code = -1; 228 freeaddrinfo(res0); 229 return 0; 230 } 231 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 232 hisctladdr.su_len = res->ai_addrlen; 233 freeaddrinfo(res0); 234 res0 = res = NULL; 235 236 len = hisctladdr.su_len; 237 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 238 warn("Can't determine my address of connection to `%s:%s'", 239 host, port); 240 code = -1; 241 goto bad; 242 } 243 myctladdr.su_len = len; 244 245 #ifdef IPTOS_LOWDELAY 246 if (hisctladdr.su_family == AF_INET) { 247 int tos = IPTOS_LOWDELAY; 248 if (setsockopt(s, IPPROTO_IP, IP_TOS, 249 (void *)&tos, sizeof(tos)) == -1) { 250 DWARN("setsockopt %s (ignored)", 251 "IPTOS_LOWDELAY"); 252 } 253 } 254 #endif 255 cin = fdopen(s, "r"); 256 cout = fdopen(s, "w"); 257 if (cin == NULL || cout == NULL) { 258 warnx("Can't fdopen socket"); 259 if (cin) 260 (void)fclose(cin); 261 if (cout) 262 (void)fclose(cout); 263 code = -1; 264 goto bad; 265 } 266 if (verbose) 267 fprintf(ttyout, "Connected to %s.\n", hostname); 268 if (getreply(0) > 2) { /* read startup message from server */ 269 if (cin) 270 (void)fclose(cin); 271 if (cout) 272 (void)fclose(cout); 273 code = -1; 274 goto bad; 275 } 276 277 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 278 (void *)&on, sizeof(on)) == -1) { 279 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 280 } 281 282 return (hostname); 283 bad: 284 (void)close(s); 285 return (NULL); 286 } 287 288 void 289 cmdabort(int notused) 290 { 291 int oerrno = errno; 292 293 sigint_raised = 1; 294 alarmtimer(0); 295 if (fromatty) 296 write(fileno(ttyout), "\n", 1); 297 abrtflag++; 298 if (ptflag) 299 siglongjmp(ptabort, 1); 300 errno = oerrno; 301 } 302 303 void 304 cmdtimeout(int notused) 305 { 306 int oerrno = errno; 307 308 alarmtimer(0); 309 if (fromatty) 310 write(fileno(ttyout), "\n", 1); 311 timeoutflag++; 312 if (ptflag) 313 siglongjmp(ptabort, 1); 314 errno = oerrno; 315 } 316 317 /*VARARGS*/ 318 int 319 command(const char *fmt, ...) 320 { 321 va_list ap; 322 int r; 323 sigfunc oldsigint; 324 325 #ifndef NO_DEBUG 326 if (ftp_debug) { 327 fputs("---> ", ttyout); 328 va_start(ap, fmt); 329 if (strncmp("PASS ", fmt, 5) == 0) 330 fputs("PASS XXXX", ttyout); 331 else if (strncmp("ACCT ", fmt, 5) == 0) 332 fputs("ACCT XXXX", ttyout); 333 else 334 vfprintf(ttyout, fmt, ap); 335 va_end(ap); 336 putc('\n', ttyout); 337 } 338 #endif 339 if (cout == NULL) { 340 warnx("No control connection for command"); 341 code = -1; 342 return (0); 343 } 344 345 abrtflag = 0; 346 347 oldsigint = xsignal(SIGINT, cmdabort); 348 349 va_start(ap, fmt); 350 vfprintf(cout, fmt, ap); 351 va_end(ap); 352 fputs("\r\n", cout); 353 (void)fflush(cout); 354 cpend = 1; 355 r = getreply(!strcmp(fmt, "QUIT")); 356 if (abrtflag && oldsigint != SIG_IGN) 357 (*oldsigint)(SIGINT); 358 (void)xsignal(SIGINT, oldsigint); 359 return (r); 360 } 361 362 static const char *m421[] = { 363 "remote server timed out. Connection closed", 364 "user interrupt. Connection closed", 365 "remote server has closed connection", 366 }; 367 368 int 369 getreply(int expecteof) 370 { 371 char current_line[BUFSIZ]; /* last line of previous reply */ 372 int c, n, line; 373 int dig; 374 int originalcode = 0, continuation = 0; 375 sigfunc oldsigint, oldsigalrm; 376 int pflag = 0; 377 char *cp, *pt = pasv; 378 379 abrtflag = 0; 380 timeoutflag = 0; 381 382 oldsigint = xsignal(SIGINT, cmdabort); 383 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 384 385 for (line = 0 ;; line++) { 386 dig = n = code = 0; 387 cp = current_line; 388 while (alarmtimer(quit_time ? quit_time : 60), 389 ((c = getc(cin)) != '\n')) { 390 if (c == IAC) { /* handle telnet commands */ 391 switch (c = getc(cin)) { 392 case WILL: 393 case WONT: 394 c = getc(cin); 395 fprintf(cout, "%c%c%c", IAC, DONT, c); 396 (void)fflush(cout); 397 break; 398 case DO: 399 case DONT: 400 c = getc(cin); 401 fprintf(cout, "%c%c%c", IAC, WONT, c); 402 (void)fflush(cout); 403 break; 404 default: 405 break; 406 } 407 continue; 408 } 409 dig++; 410 if (c == EOF) { 411 /* 412 * these will get trashed by pswitch() 413 * in lostpeer() 414 */ 415 int reply_timeoutflag = timeoutflag; 416 int reply_abrtflag = abrtflag; 417 418 alarmtimer(0); 419 if (expecteof && feof(cin)) { 420 (void)xsignal(SIGINT, oldsigint); 421 (void)xsignal(SIGALRM, oldsigalrm); 422 code = 221; 423 return (0); 424 } 425 cpend = 0; 426 lostpeer(0); 427 if (verbose) { 428 size_t midx; 429 if (reply_timeoutflag) 430 midx = 0; 431 else if (reply_abrtflag) 432 midx = 1; 433 else 434 midx = 2; 435 (void)fprintf(ttyout, 436 "421 Service not available, %s.\n", m421[midx]); 437 (void)fflush(ttyout); 438 } 439 code = 421; 440 (void)xsignal(SIGINT, oldsigint); 441 (void)xsignal(SIGALRM, oldsigalrm); 442 return (4); 443 } 444 if (c != '\r' && (verbose > 0 || 445 ((verbose > -1 && n == '5' && dig > 4) && 446 (((!n && c < '5') || (n && n < '5')) 447 || !retry_connect)))) { 448 if (proxflag && 449 (dig == 1 || (dig == 5 && verbose == 0))) 450 fprintf(ttyout, "%s:", hostname); 451 (void)putc(c, ttyout); 452 } 453 if (dig < 4 && isdigit(c)) 454 code = code * 10 + (c - '0'); 455 if (!pflag && (code == 227 || code == 228)) 456 pflag = 1; 457 else if (!pflag && code == 229) 458 pflag = 100; 459 if (dig > 4 && pflag == 1 && isdigit(c)) 460 pflag = 2; 461 if (pflag == 2) { 462 if (c != '\r' && c != ')') { 463 if (pt < &pasv[sizeof(pasv) - 1]) 464 *pt++ = c; 465 } else { 466 *pt = '\0'; 467 pflag = 3; 468 } 469 } 470 if (pflag == 100 && c == '(') 471 pflag = 2; 472 if (dig == 4 && c == '-') { 473 if (continuation) 474 code = 0; 475 continuation++; 476 } 477 if (n == 0) 478 n = c; 479 if (cp < ¤t_line[sizeof(current_line) - 1]) 480 *cp++ = c; 481 } 482 if (verbose > 0 || ((verbose > -1 && n == '5') && 483 (n < '5' || !retry_connect))) { 484 (void)putc(c, ttyout); 485 (void)fflush(ttyout); 486 } 487 if (cp[-1] == '\r') 488 cp[-1] = '\0'; 489 *cp = '\0'; 490 if (line == 0) 491 (void)strlcpy(reply_string, current_line, 492 sizeof(reply_string)); 493 if (line > 0 && code == 0 && reply_callback != NULL) 494 (*reply_callback)(current_line); 495 if (continuation && code != originalcode) { 496 if (originalcode == 0) 497 originalcode = code; 498 continue; 499 } 500 if (n != '1') 501 cpend = 0; 502 alarmtimer(0); 503 (void)xsignal(SIGINT, oldsigint); 504 (void)xsignal(SIGALRM, oldsigalrm); 505 if (code == 421 || originalcode == 421) 506 lostpeer(0); 507 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 508 (*oldsigint)(SIGINT); 509 if (timeoutflag && oldsigalrm != cmdtimeout && 510 oldsigalrm != SIG_IGN) 511 (*oldsigalrm)(SIGINT); 512 return (n - '0'); 513 } 514 } 515 516 static int 517 empty(FILE *cin, FILE *din, int sec) 518 { 519 int nr, nfd; 520 struct pollfd pfd[2]; 521 522 nfd = 0; 523 if (cin) { 524 pfd[nfd].fd = fileno(cin); 525 pfd[nfd++].events = POLLIN; 526 } 527 528 if (din) { 529 pfd[nfd].fd = fileno(din); 530 pfd[nfd++].events = POLLIN; 531 } 532 533 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 534 return nr; 535 536 nr = 0; 537 nfd = 0; 538 if (cin) 539 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 540 if (din) 541 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 542 return nr; 543 } 544 545 sigjmp_buf xferabort; 546 547 void 548 abortxfer(int notused) 549 { 550 char msgbuf[100]; 551 size_t len; 552 553 sigint_raised = 1; 554 alarmtimer(0); 555 mflag = 0; 556 abrtflag = 0; 557 switch (direction[0]) { 558 case 'r': 559 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 560 break; 561 case 's': 562 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 563 break; 564 default: 565 errx(1, "abortxfer: unknown direction `%s'", direction); 566 } 567 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 568 sizeof(msgbuf)); 569 write(fileno(ttyout), msgbuf, len); 570 siglongjmp(xferabort, 1); 571 } 572 573 /* 574 * Read data from infd & write to outfd, using buf/bufsize as the temporary 575 * buffer, dealing with short writes. 576 * If rate_limit != 0, rate-limit the transfer. 577 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 578 * Updates global variables: bytes. 579 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 580 * In the case of error, errno contains the appropriate error code. 581 */ 582 static int 583 copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 584 int rate_limit, int hash_interval) 585 { 586 volatile off_t hashc; 587 ssize_t inc, outc; 588 char *bufp; 589 struct timeval tvthen, tvnow, tvdiff; 590 off_t bufrem, bufchunk; 591 int serr; 592 593 hashc = hash_interval; 594 if (rate_limit) 595 bufchunk = rate_limit; 596 else 597 bufchunk = bufsize; 598 599 while (1) { 600 if (rate_limit) { 601 (void)gettimeofday(&tvthen, NULL); 602 } 603 errno = 0; 604 inc = outc = 0; 605 /* copy bufchunk at a time */ 606 bufrem = bufchunk; 607 while (bufrem > 0) { 608 inc = read(infd, buf, MIN(bufsize, bufrem)); 609 if (inc <= 0) 610 goto copy_done; 611 bytes += inc; 612 bufrem -= inc; 613 bufp = buf; 614 while (inc > 0) { 615 outc = write(outfd, bufp, inc); 616 if (outc < 0) 617 goto copy_done; 618 inc -= outc; 619 bufp += outc; 620 } 621 if (hash_interval) { 622 while (bytes >= hashc) { 623 (void)putc('#', ttyout); 624 hashc += hash_interval; 625 } 626 (void)fflush(ttyout); 627 } 628 } 629 if (rate_limit) { /* rate limited; wait if necessary */ 630 while (1) { 631 (void)gettimeofday(&tvnow, NULL); 632 timersub(&tvnow, &tvthen, &tvdiff); 633 if (tvdiff.tv_sec > 0) 634 break; 635 usleep(1000000 - tvdiff.tv_usec); 636 } 637 } 638 } 639 640 copy_done: 641 serr = errno; 642 if (hash_interval && bytes > 0) { 643 if (bytes < hash_interval) 644 (void)putc('#', ttyout); 645 (void)putc('\n', ttyout); 646 (void)fflush(ttyout); 647 } 648 errno = serr; 649 if (inc == -1) 650 return 1; 651 if (outc == -1) 652 return 2; 653 654 return 0; 655 } 656 657 void 658 sendrequest(const char *cmd, const char *local, const char *remote, 659 int printnames) 660 { 661 struct stat st; 662 int c; 663 FILE *volatile fin; 664 FILE *volatile dout; 665 int (*volatile closefunc)(FILE *); 666 sigfunc volatile oldintr; 667 sigfunc volatile oldintp; 668 off_t volatile hashbytes; 669 int hash_interval; 670 char *volatile lmode; 671 static size_t bufsize; 672 static char *buf; 673 int oprogress; 674 675 hashbytes = mark; 676 direction = "sent"; 677 dout = NULL; 678 bytes = 0; 679 filesize = -1; 680 oprogress = progress; 681 if (verbose && printnames) { 682 if (*local != '-') 683 fprintf(ttyout, "local: %s ", local); 684 if (remote) 685 fprintf(ttyout, "remote: %s\n", remote); 686 } 687 if (proxy) { 688 proxtrans(cmd, local, remote); 689 return; 690 } 691 if (curtype != type) 692 changetype(type, 0); 693 closefunc = NULL; 694 oldintr = NULL; 695 oldintp = NULL; 696 lmode = "w"; 697 if (sigsetjmp(xferabort, 1)) { 698 while (cpend) 699 (void)getreply(0); 700 code = -1; 701 goto cleanupsend; 702 } 703 (void)xsignal(SIGQUIT, psummary); 704 oldintr = xsignal(SIGINT, abortxfer); 705 if (strcmp(local, "-") == 0) { 706 fin = stdin; 707 progress = 0; 708 } else if (*local == '|') { 709 oldintp = xsignal(SIGPIPE, SIG_IGN); 710 fin = popen(local + 1, "r"); 711 if (fin == NULL) { 712 warn("Can't execute `%s'", local + 1); 713 code = -1; 714 goto cleanupsend; 715 } 716 progress = 0; 717 closefunc = pclose; 718 } else { 719 fin = fopen(local, "r"); 720 if (fin == NULL) { 721 warn("Can't open `%s'", local); 722 code = -1; 723 goto cleanupsend; 724 } 725 closefunc = fclose; 726 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 727 fprintf(ttyout, "%s: not a plain file.\n", local); 728 code = -1; 729 goto cleanupsend; 730 } 731 filesize = st.st_size; 732 } 733 if (initconn()) { 734 code = -1; 735 goto cleanupsend; 736 } 737 if (sigsetjmp(xferabort, 1)) 738 goto abort; 739 740 if (restart_point && 741 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 742 int rc; 743 744 rc = -1; 745 switch (curtype) { 746 case TYPE_A: 747 rc = fseeko(fin, restart_point, SEEK_SET); 748 break; 749 case TYPE_I: 750 case TYPE_L: 751 rc = lseek(fileno(fin), restart_point, SEEK_SET); 752 break; 753 } 754 if (rc < 0) { 755 warn("Can't seek to restart `%s'", local); 756 goto cleanupsend; 757 } 758 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 759 goto cleanupsend; 760 lmode = "r+"; 761 } 762 if (remote) { 763 if (command("%s %s", cmd, remote) != PRELIM) 764 goto cleanupsend; 765 } else { 766 if (command("%s", cmd) != PRELIM) 767 goto cleanupsend; 768 } 769 dirchange = 1; 770 dout = dataconn(lmode); 771 if (dout == NULL) 772 goto abort; 773 774 if (sndbuf_size > bufsize) { 775 if (buf) 776 (void)free(buf); 777 bufsize = sndbuf_size; 778 buf = ftp_malloc(bufsize); 779 } 780 781 progressmeter(-1); 782 oldintp = xsignal(SIGPIPE, SIG_IGN); 783 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 784 785 switch (curtype) { 786 787 case TYPE_I: 788 case TYPE_L: 789 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 790 rate_put, hash_interval); 791 if (c == 1) { 792 warn("Reading `%s'", local); 793 } else if (c == 2) { 794 if (errno != EPIPE) 795 warn("Writing to network"); 796 bytes = -1; 797 } 798 break; 799 800 case TYPE_A: 801 while ((c = getc(fin)) != EOF) { 802 if (c == '\n') { 803 while (hash_interval && bytes >= hashbytes) { 804 (void)putc('#', ttyout); 805 (void)fflush(ttyout); 806 hashbytes += mark; 807 } 808 if (ferror(dout)) 809 break; 810 (void)putc('\r', dout); 811 bytes++; 812 } 813 (void)putc(c, dout); 814 bytes++; 815 #if 0 /* this violates RFC0959 */ 816 if (c == '\r') { 817 (void)putc('\0', dout); 818 bytes++; 819 } 820 #endif 821 } 822 if (hash_interval) { 823 if (bytes < hashbytes) 824 (void)putc('#', ttyout); 825 (void)putc('\n', ttyout); 826 } 827 if (ferror(fin)) 828 warn("Reading `%s'", local); 829 if (ferror(dout)) { 830 if (errno != EPIPE) 831 warn("Writing to network"); 832 bytes = -1; 833 } 834 break; 835 } 836 837 progressmeter(1); 838 if (closefunc != NULL) { 839 (*closefunc)(fin); 840 fin = NULL; 841 } 842 (void)fclose(dout); 843 dout = NULL; 844 (void)getreply(0); 845 if (bytes > 0) 846 ptransfer(0); 847 goto cleanupsend; 848 849 abort: 850 (void)xsignal(SIGINT, oldintr); 851 oldintr = NULL; 852 if (!cpend) { 853 code = -1; 854 goto cleanupsend; 855 } 856 if (data >= 0) { 857 (void)close(data); 858 data = -1; 859 } 860 if (dout) { 861 (void)fclose(dout); 862 dout = NULL; 863 } 864 (void)getreply(0); 865 code = -1; 866 if (bytes > 0) 867 ptransfer(0); 868 869 cleanupsend: 870 if (oldintr) 871 (void)xsignal(SIGINT, oldintr); 872 if (oldintp) 873 (void)xsignal(SIGPIPE, oldintp); 874 if (data >= 0) { 875 (void)close(data); 876 data = -1; 877 } 878 if (closefunc != NULL && fin != NULL) 879 (*closefunc)(fin); 880 if (dout) 881 (void)fclose(dout); 882 progress = oprogress; 883 restart_point = 0; 884 bytes = 0; 885 } 886 887 void 888 recvrequest(const char *cmd, const char *volatile local, const char *remote, 889 const char *lmode, int printnames, int ignorespecial) 890 { 891 FILE *volatile fout; 892 FILE *volatile din; 893 int (*volatile closefunc)(FILE *); 894 sigfunc volatile oldintr; 895 sigfunc volatile oldintp; 896 int c, d; 897 int volatile is_retr; 898 int volatile tcrflag; 899 int volatile bare_lfs; 900 static size_t bufsize; 901 static char *buf; 902 off_t volatile hashbytes; 903 int hash_interval; 904 struct stat st; 905 time_t mtime; 906 struct timeval tval[2]; 907 int oprogress; 908 int opreserve; 909 910 fout = NULL; 911 din = NULL; 912 hashbytes = mark; 913 direction = "received"; 914 bytes = 0; 915 bare_lfs = 0; 916 filesize = -1; 917 oprogress = progress; 918 opreserve = preserve; 919 is_retr = (strcmp(cmd, "RETR") == 0); 920 if (is_retr && verbose && printnames) { 921 if (ignorespecial || *local != '-') 922 fprintf(ttyout, "local: %s ", local); 923 if (remote) 924 fprintf(ttyout, "remote: %s\n", remote); 925 } 926 if (proxy && is_retr) { 927 proxtrans(cmd, local, remote); 928 return; 929 } 930 closefunc = NULL; 931 oldintr = NULL; 932 oldintp = NULL; 933 tcrflag = !crflag && is_retr; 934 if (sigsetjmp(xferabort, 1)) { 935 while (cpend) 936 (void)getreply(0); 937 code = -1; 938 goto cleanuprecv; 939 } 940 (void)xsignal(SIGQUIT, psummary); 941 oldintr = xsignal(SIGINT, abortxfer); 942 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 943 if (access(local, W_OK) < 0) { 944 char *dir = strrchr(local, '/'); 945 946 if (errno != ENOENT && errno != EACCES) { 947 warn("Can't access `%s'", local); 948 code = -1; 949 goto cleanuprecv; 950 } 951 if (dir != NULL) 952 *dir = 0; 953 d = access(dir == local ? "/" : 954 dir ? local : ".", W_OK); 955 if (dir != NULL) 956 *dir = '/'; 957 if (d < 0) { 958 warn("Can't access `%s'", local); 959 code = -1; 960 goto cleanuprecv; 961 } 962 if (!runique && errno == EACCES && 963 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 964 warn("Can't chmod `%s'", local); 965 code = -1; 966 goto cleanuprecv; 967 } 968 if (runique && errno == EACCES && 969 (local = gunique(local)) == NULL) { 970 code = -1; 971 goto cleanuprecv; 972 } 973 } 974 else if (runique && (local = gunique(local)) == NULL) { 975 code = -1; 976 goto cleanuprecv; 977 } 978 } 979 if (!is_retr) { 980 if (curtype != TYPE_A) 981 changetype(TYPE_A, 0); 982 } else { 983 if (curtype != type) 984 changetype(type, 0); 985 filesize = remotesize(remote, 0); 986 if (code == 421 || code == -1) 987 goto cleanuprecv; 988 } 989 if (initconn()) { 990 code = -1; 991 goto cleanuprecv; 992 } 993 if (sigsetjmp(xferabort, 1)) 994 goto abort; 995 if (is_retr && restart_point && 996 command("REST " LLF, (LLT) restart_point) != CONTINUE) 997 goto cleanuprecv; 998 if (! EMPTYSTRING(remote)) { 999 if (command("%s %s", cmd, remote) != PRELIM) 1000 goto cleanuprecv; 1001 } else { 1002 if (command("%s", cmd) != PRELIM) 1003 goto cleanuprecv; 1004 } 1005 din = dataconn("r"); 1006 if (din == NULL) 1007 goto abort; 1008 if (!ignorespecial && strcmp(local, "-") == 0) { 1009 fout = stdout; 1010 progress = 0; 1011 preserve = 0; 1012 } else if (!ignorespecial && *local == '|') { 1013 oldintp = xsignal(SIGPIPE, SIG_IGN); 1014 fout = popen(local + 1, "w"); 1015 if (fout == NULL) { 1016 warn("Can't execute `%s'", local+1); 1017 goto abort; 1018 } 1019 progress = 0; 1020 preserve = 0; 1021 closefunc = pclose; 1022 } else { 1023 fout = fopen(local, lmode); 1024 if (fout == NULL) { 1025 warn("Can't open `%s'", local); 1026 goto abort; 1027 } 1028 closefunc = fclose; 1029 } 1030 1031 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1032 progress = 0; 1033 preserve = 0; 1034 } 1035 if (rcvbuf_size > bufsize) { 1036 if (buf) 1037 (void)free(buf); 1038 bufsize = rcvbuf_size; 1039 buf = ftp_malloc(bufsize); 1040 } 1041 1042 progressmeter(-1); 1043 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1044 1045 switch (curtype) { 1046 1047 case TYPE_I: 1048 case TYPE_L: 1049 if (is_retr && restart_point && 1050 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1051 warn("Can't seek to restart `%s'", local); 1052 goto cleanuprecv; 1053 } 1054 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1055 rate_get, hash_interval); 1056 if (c == 1) { 1057 if (errno != EPIPE) 1058 warn("Reading from network"); 1059 bytes = -1; 1060 } else if (c == 2) { 1061 warn("Writing `%s'", local); 1062 } 1063 break; 1064 1065 case TYPE_A: 1066 if (is_retr && restart_point) { 1067 int ch; 1068 off_t i; 1069 1070 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1071 goto done; 1072 for (i = 0; i++ < restart_point;) { 1073 if ((ch = getc(fout)) == EOF) 1074 goto done; 1075 if (ch == '\n') 1076 i++; 1077 } 1078 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1079 done: 1080 warn("Can't seek to restart `%s'", local); 1081 goto cleanuprecv; 1082 } 1083 } 1084 while ((c = getc(din)) != EOF) { 1085 if (c == '\n') 1086 bare_lfs++; 1087 while (c == '\r') { 1088 while (hash_interval && bytes >= hashbytes) { 1089 (void)putc('#', ttyout); 1090 (void)fflush(ttyout); 1091 hashbytes += mark; 1092 } 1093 bytes++; 1094 if ((c = getc(din)) != '\n' || tcrflag) { 1095 if (ferror(fout)) 1096 goto break2; 1097 (void)putc('\r', fout); 1098 if (c == '\0') { 1099 bytes++; 1100 goto contin2; 1101 } 1102 if (c == EOF) 1103 goto contin2; 1104 } 1105 } 1106 (void)putc(c, fout); 1107 bytes++; 1108 contin2: ; 1109 } 1110 break2: 1111 if (hash_interval) { 1112 if (bytes < hashbytes) 1113 (void)putc('#', ttyout); 1114 (void)putc('\n', ttyout); 1115 } 1116 if (ferror(din)) { 1117 if (errno != EPIPE) 1118 warn("Reading from network"); 1119 bytes = -1; 1120 } 1121 if (ferror(fout)) 1122 warn("Writing `%s'", local); 1123 break; 1124 } 1125 1126 progressmeter(1); 1127 if (closefunc != NULL) { 1128 (*closefunc)(fout); 1129 fout = NULL; 1130 } 1131 (void)fclose(din); 1132 din = NULL; 1133 (void)getreply(0); 1134 if (bare_lfs) { 1135 fprintf(ttyout, 1136 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1137 bare_lfs); 1138 fputs("File may not have transferred correctly.\n", ttyout); 1139 } 1140 if (bytes >= 0 && is_retr) { 1141 if (bytes > 0) 1142 ptransfer(0); 1143 if (preserve && (closefunc == fclose)) { 1144 mtime = remotemodtime(remote, 0); 1145 if (mtime != -1) { 1146 (void)gettimeofday(&tval[0], NULL); 1147 tval[1].tv_sec = mtime; 1148 tval[1].tv_usec = 0; 1149 if (utimes(local, tval) == -1) { 1150 fprintf(ttyout, 1151 "Can't change modification time on %s to %s", 1152 local, 1153 rfc2822time(localtime(&mtime))); 1154 } 1155 } 1156 } 1157 } 1158 goto cleanuprecv; 1159 1160 abort: 1161 /* 1162 * abort using RFC0959 recommended IP,SYNC sequence 1163 */ 1164 if (! sigsetjmp(xferabort, 1)) { 1165 /* this is the first call */ 1166 (void)xsignal(SIGINT, abort_squared); 1167 if (!cpend) { 1168 code = -1; 1169 goto cleanuprecv; 1170 } 1171 abort_remote(din); 1172 } 1173 code = -1; 1174 if (bytes > 0) 1175 ptransfer(0); 1176 1177 cleanuprecv: 1178 if (oldintr) 1179 (void)xsignal(SIGINT, oldintr); 1180 if (oldintp) 1181 (void)xsignal(SIGPIPE, oldintp); 1182 if (data >= 0) { 1183 (void)close(data); 1184 data = -1; 1185 } 1186 if (closefunc != NULL && fout != NULL) 1187 (*closefunc)(fout); 1188 if (din) 1189 (void)fclose(din); 1190 progress = oprogress; 1191 preserve = opreserve; 1192 bytes = 0; 1193 } 1194 1195 /* 1196 * Need to start a listen on the data channel before we send the command, 1197 * otherwise the server's connect may fail. 1198 */ 1199 int 1200 initconn(void) 1201 { 1202 char *p, *a; 1203 int result, tmpno = 0; 1204 int on = 1; 1205 int error; 1206 unsigned int addr[16], port[2]; 1207 unsigned int af, hal, pal; 1208 socklen_t len; 1209 char *pasvcmd = NULL; 1210 int overbose; 1211 1212 #ifdef INET6 1213 #ifndef NO_DEBUG 1214 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1215 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1216 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1217 warnx("Use of scoped addresses can be troublesome"); 1218 } 1219 #endif 1220 #endif 1221 1222 reinit: 1223 if (passivemode) { 1224 data_addr = myctladdr; 1225 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1226 if (data < 0) { 1227 warn("Can't create socket for data connection"); 1228 return (1); 1229 } 1230 if ((options & SO_DEBUG) && 1231 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1232 (void *)&on, sizeof(on)) == -1) { 1233 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1234 } 1235 result = COMPLETE + 1; 1236 switch (data_addr.su_family) { 1237 case AF_INET: 1238 if (epsv4 && !epsv4bad) { 1239 pasvcmd = "EPSV"; 1240 overbose = verbose; 1241 if (ftp_debug == 0) 1242 verbose = -1; 1243 result = command("EPSV"); 1244 verbose = overbose; 1245 if (verbose > 0 && 1246 (result == COMPLETE || !connected)) 1247 fprintf(ttyout, "%s\n", reply_string); 1248 if (!connected) 1249 return (1); 1250 /* 1251 * this code is to be friendly with broken 1252 * BSDI ftpd 1253 */ 1254 if (code / 10 == 22 && code != 229) { 1255 fputs( 1256 "wrong server: return code must be 229\n", 1257 ttyout); 1258 result = COMPLETE + 1; 1259 } 1260 if (result != COMPLETE) { 1261 epsv4bad = 1; 1262 DPRINTF("disabling epsv4 for this " 1263 "connection\n"); 1264 } 1265 } 1266 if (result != COMPLETE) { 1267 pasvcmd = "PASV"; 1268 result = command("PASV"); 1269 if (!connected) 1270 return (1); 1271 } 1272 break; 1273 #ifdef INET6 1274 case AF_INET6: 1275 pasvcmd = "EPSV"; 1276 overbose = verbose; 1277 if (ftp_debug == 0) 1278 verbose = -1; 1279 result = command("EPSV"); 1280 verbose = overbose; 1281 if (verbose > 0 && 1282 (result == COMPLETE || !connected)) 1283 fprintf(ttyout, "%s\n", reply_string); 1284 if (!connected) 1285 return (1); 1286 /* this code is to be friendly with broken BSDI ftpd */ 1287 if (code / 10 == 22 && code != 229) { 1288 fputs( 1289 "wrong server: return code must be 229\n", 1290 ttyout); 1291 result = COMPLETE + 1; 1292 } 1293 if (result != COMPLETE) { 1294 pasvcmd = "LPSV"; 1295 result = command("LPSV"); 1296 } 1297 if (!connected) 1298 return (1); 1299 break; 1300 #endif 1301 default: 1302 result = COMPLETE + 1; 1303 break; 1304 } 1305 if (result != COMPLETE) { 1306 if (activefallback) { 1307 (void)close(data); 1308 data = -1; 1309 passivemode = 0; 1310 #if 0 1311 activefallback = 0; 1312 #endif 1313 goto reinit; 1314 } 1315 fputs("Passive mode refused.\n", ttyout); 1316 goto bad; 1317 } 1318 1319 #define pack2(var, off) \ 1320 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1321 #define pack4(var, off) \ 1322 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1323 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1324 #define UC(b) (((int)b)&0xff) 1325 1326 /* 1327 * What we've got at this point is a string of comma separated 1328 * one-byte unsigned integer values, separated by commas. 1329 */ 1330 if (strcmp(pasvcmd, "PASV") == 0) { 1331 if (data_addr.su_family != AF_INET) { 1332 fputs( 1333 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1334 error = 1; 1335 goto bad; 1336 } 1337 if (code / 10 == 22 && code != 227) { 1338 fputs("wrong server: return code must be 227\n", 1339 ttyout); 1340 error = 1; 1341 goto bad; 1342 } 1343 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1344 &addr[0], &addr[1], &addr[2], &addr[3], 1345 &port[0], &port[1]); 1346 if (error != 6) { 1347 fputs( 1348 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1349 error = 1; 1350 goto bad; 1351 } 1352 error = 0; 1353 memset(&data_addr, 0, sizeof(data_addr)); 1354 data_addr.su_family = AF_INET; 1355 data_addr.su_len = sizeof(struct sockaddr_in); 1356 data_addr.si_su.su_sin.sin_addr.s_addr = 1357 htonl(pack4(addr, 0)); 1358 data_addr.su_port = htons(pack2(port, 0)); 1359 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1360 if (code / 10 == 22 && code != 228) { 1361 fputs("wrong server: return code must be 228\n", 1362 ttyout); 1363 error = 1; 1364 goto bad; 1365 } 1366 switch (data_addr.su_family) { 1367 case AF_INET: 1368 error = sscanf(pasv, 1369 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1370 &af, &hal, 1371 &addr[0], &addr[1], &addr[2], &addr[3], 1372 &pal, &port[0], &port[1]); 1373 if (error != 9) { 1374 fputs( 1375 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1376 error = 1; 1377 goto bad; 1378 } 1379 if (af != 4 || hal != 4 || pal != 2) { 1380 fputs( 1381 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1382 error = 1; 1383 goto bad; 1384 } 1385 1386 error = 0; 1387 memset(&data_addr, 0, sizeof(data_addr)); 1388 data_addr.su_family = AF_INET; 1389 data_addr.su_len = sizeof(struct sockaddr_in); 1390 data_addr.si_su.su_sin.sin_addr.s_addr = 1391 htonl(pack4(addr, 0)); 1392 data_addr.su_port = htons(pack2(port, 0)); 1393 break; 1394 #ifdef INET6 1395 case AF_INET6: 1396 error = sscanf(pasv, 1397 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1398 &af, &hal, 1399 &addr[0], &addr[1], &addr[2], &addr[3], 1400 &addr[4], &addr[5], &addr[6], &addr[7], 1401 &addr[8], &addr[9], &addr[10], 1402 &addr[11], &addr[12], &addr[13], 1403 &addr[14], &addr[15], 1404 &pal, &port[0], &port[1]); 1405 if (error != 21) { 1406 fputs( 1407 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1408 error = 1; 1409 goto bad; 1410 } 1411 if (af != 6 || hal != 16 || pal != 2) { 1412 fputs( 1413 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1414 error = 1; 1415 goto bad; 1416 } 1417 1418 error = 0; 1419 memset(&data_addr, 0, sizeof(data_addr)); 1420 data_addr.su_family = AF_INET6; 1421 data_addr.su_len = sizeof(struct sockaddr_in6); 1422 { 1423 int i; 1424 for (i = 0; i < sizeof(struct in6_addr); i++) { 1425 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1426 UC(addr[i]); 1427 } 1428 } 1429 data_addr.su_port = htons(pack2(port, 0)); 1430 break; 1431 #endif 1432 default: 1433 error = 1; 1434 } 1435 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1436 char delim[4]; 1437 1438 port[0] = 0; 1439 if (code / 10 == 22 && code != 229) { 1440 fputs("wrong server: return code must be 229\n", 1441 ttyout); 1442 error = 1; 1443 goto bad; 1444 } 1445 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1446 &delim[1], &delim[2], &port[1], 1447 &delim[3]) != 5) { 1448 fputs("parse error!\n", ttyout); 1449 error = 1; 1450 goto bad; 1451 } 1452 if (delim[0] != delim[1] || delim[0] != delim[2] 1453 || delim[0] != delim[3]) { 1454 fputs("parse error!\n", ttyout); 1455 error = 1; 1456 goto bad; 1457 } 1458 data_addr = hisctladdr; 1459 data_addr.su_port = htons(port[1]); 1460 } else 1461 goto bad; 1462 1463 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1464 data_addr.su_len) < 0) { 1465 if (activefallback) { 1466 (void)close(data); 1467 data = -1; 1468 passivemode = 0; 1469 #if 0 1470 activefallback = 0; 1471 #endif 1472 goto reinit; 1473 } 1474 goto bad; 1475 } 1476 #ifdef IPTOS_THROUGHPUT 1477 if (data_addr.su_family == AF_INET) { 1478 on = IPTOS_THROUGHPUT; 1479 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1480 (void *)&on, sizeof(on)) == -1) { 1481 DWARN("setsockopt %s (ignored)", 1482 "IPTOS_THROUGHPUT"); 1483 } 1484 } 1485 #endif 1486 return (0); 1487 } 1488 1489 noport: 1490 data_addr = myctladdr; 1491 if (sendport) 1492 data_addr.su_port = 0; /* let system pick one */ 1493 if (data != -1) 1494 (void)close(data); 1495 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1496 if (data < 0) { 1497 warn("Can't create socket for data connection"); 1498 if (tmpno) 1499 sendport = 1; 1500 return (1); 1501 } 1502 if (!sendport) 1503 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1504 (void *)&on, sizeof(on)) == -1) { 1505 warn("Can't set SO_REUSEADDR on data connection"); 1506 goto bad; 1507 } 1508 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1509 data_addr.su_len) < 0) { 1510 warn("Can't bind for data connection"); 1511 goto bad; 1512 } 1513 if ((options & SO_DEBUG) && 1514 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1515 (void *)&on, sizeof(on)) == -1) { 1516 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1517 } 1518 len = sizeof(data_addr.si_su); 1519 memset((char *)&data_addr, 0, sizeof (data_addr)); 1520 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1521 warn("Can't determine my address of data connection"); 1522 goto bad; 1523 } 1524 data_addr.su_len = len; 1525 if (ftp_listen(data, 1) < 0) 1526 warn("Can't listen to data connection"); 1527 1528 if (sendport) { 1529 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1530 int af; 1531 struct sockinet tmp; 1532 1533 switch (data_addr.su_family) { 1534 case AF_INET: 1535 if (!epsv4 || epsv4bad) { 1536 result = COMPLETE + 1; 1537 break; 1538 } 1539 /* FALLTHROUGH */ 1540 #ifdef INET6 1541 case AF_INET6: 1542 #endif 1543 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1544 tmp = data_addr; 1545 #ifdef INET6 1546 if (tmp.su_family == AF_INET6) 1547 tmp.si_su.su_sin6.sin6_scope_id = 0; 1548 #endif 1549 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1550 tmp.su_len, hname, sizeof(hname), sname, 1551 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1552 result = ERROR; 1553 } else { 1554 overbose = verbose; 1555 if (ftp_debug == 0) 1556 verbose = -1; 1557 result = command("EPRT |%d|%s|%s|", af, hname, 1558 sname); 1559 verbose = overbose; 1560 if (verbose > 0 && 1561 (result == COMPLETE || !connected)) 1562 fprintf(ttyout, "%s\n", reply_string); 1563 if (!connected) 1564 return (1); 1565 if (result != COMPLETE) { 1566 epsv4bad = 1; 1567 DPRINTF("disabling epsv4 for this " 1568 "connection\n"); 1569 } 1570 } 1571 break; 1572 default: 1573 result = COMPLETE + 1; 1574 break; 1575 } 1576 if (result == COMPLETE) 1577 goto skip_port; 1578 1579 switch (data_addr.su_family) { 1580 case AF_INET: 1581 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1582 p = (char *)&data_addr.su_port; 1583 result = command("PORT %d,%d,%d,%d,%d,%d", 1584 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1585 UC(p[0]), UC(p[1])); 1586 break; 1587 #ifdef INET6 1588 case AF_INET6: 1589 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1590 p = (char *)&data_addr.su_port; 1591 result = command( 1592 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1593 6, 16, 1594 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1595 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1596 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1597 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1598 2, UC(p[0]), UC(p[1])); 1599 break; 1600 #endif 1601 default: 1602 result = COMPLETE + 1; /* xxx */ 1603 } 1604 if (!connected) 1605 return (1); 1606 skip_port: 1607 1608 if (result == ERROR && sendport == -1) { 1609 sendport = 0; 1610 tmpno = 1; 1611 goto noport; 1612 } 1613 return (result != COMPLETE); 1614 } 1615 if (tmpno) 1616 sendport = 1; 1617 #ifdef IPTOS_THROUGHPUT 1618 if (data_addr.su_family == AF_INET) { 1619 on = IPTOS_THROUGHPUT; 1620 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1621 (void *)&on, sizeof(on)) == -1) 1622 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1623 } 1624 #endif 1625 return (0); 1626 bad: 1627 (void)close(data); 1628 data = -1; 1629 if (tmpno) 1630 sendport = 1; 1631 return (1); 1632 } 1633 1634 FILE * 1635 dataconn(const char *lmode) 1636 { 1637 struct sockinet from; 1638 int s, flags, rv, timeout; 1639 struct timeval endtime, now, td; 1640 struct pollfd pfd[1]; 1641 socklen_t fromlen; 1642 1643 if (passivemode) /* passive data connection */ 1644 return (fdopen(data, lmode)); 1645 1646 /* active mode data connection */ 1647 1648 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1649 goto dataconn_failed; /* get current socket flags */ 1650 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1651 goto dataconn_failed; /* set non-blocking connect */ 1652 1653 /* NOTE: we now must restore socket flags on successful exit */ 1654 1655 /* limit time waiting on listening socket */ 1656 pfd[0].fd = data; 1657 pfd[0].events = POLLIN; 1658 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1659 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1660 /* without -q, default to 60s */ 1661 do { 1662 (void)gettimeofday(&now, NULL); 1663 timersub(&endtime, &now, &td); 1664 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1665 if (timeout < 0) 1666 timeout = 0; 1667 rv = ftp_poll(pfd, 1, timeout); 1668 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1669 if (rv == -1) { 1670 warn("Can't poll waiting before accept"); 1671 goto dataconn_failed; 1672 } 1673 if (rv == 0) { 1674 warnx("Poll timeout waiting before accept"); 1675 goto dataconn_failed; 1676 } 1677 1678 /* (non-blocking) accept the connection */ 1679 fromlen = myctladdr.su_len; 1680 do { 1681 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1682 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1683 if (s == -1) { 1684 warn("Can't accept data connection"); 1685 goto dataconn_failed; 1686 } 1687 1688 (void)close(data); 1689 data = s; 1690 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1691 goto dataconn_failed; 1692 1693 #ifdef IPTOS_THROUGHPUT 1694 if (from.su_family == AF_INET) { 1695 int tos = IPTOS_THROUGHPUT; 1696 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1697 (void *)&tos, sizeof(tos)) == -1) { 1698 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1699 } 1700 } 1701 #endif 1702 return (fdopen(data, lmode)); 1703 1704 dataconn_failed: 1705 (void)close(data); 1706 data = -1; 1707 return (NULL); 1708 } 1709 1710 void 1711 psabort(int notused) 1712 { 1713 int oerrno = errno; 1714 1715 sigint_raised = 1; 1716 alarmtimer(0); 1717 abrtflag++; 1718 errno = oerrno; 1719 } 1720 1721 void 1722 pswitch(int flag) 1723 { 1724 sigfunc oldintr; 1725 static struct comvars { 1726 int connect; 1727 char name[MAXHOSTNAMELEN]; 1728 struct sockinet mctl; 1729 struct sockinet hctl; 1730 FILE *in; 1731 FILE *out; 1732 int tpe; 1733 int curtpe; 1734 int cpnd; 1735 int sunqe; 1736 int runqe; 1737 int mcse; 1738 int ntflg; 1739 char nti[17]; 1740 char nto[17]; 1741 int mapflg; 1742 char mi[MAXPATHLEN]; 1743 char mo[MAXPATHLEN]; 1744 } proxstruct, tmpstruct; 1745 struct comvars *ip, *op; 1746 1747 abrtflag = 0; 1748 oldintr = xsignal(SIGINT, psabort); 1749 if (flag) { 1750 if (proxy) 1751 return; 1752 ip = &tmpstruct; 1753 op = &proxstruct; 1754 proxy++; 1755 } else { 1756 if (!proxy) 1757 return; 1758 ip = &proxstruct; 1759 op = &tmpstruct; 1760 proxy = 0; 1761 } 1762 ip->connect = connected; 1763 connected = op->connect; 1764 if (hostname) 1765 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1766 else 1767 ip->name[0] = '\0'; 1768 hostname = op->name; 1769 ip->hctl = hisctladdr; 1770 hisctladdr = op->hctl; 1771 ip->mctl = myctladdr; 1772 myctladdr = op->mctl; 1773 ip->in = cin; 1774 cin = op->in; 1775 ip->out = cout; 1776 cout = op->out; 1777 ip->tpe = type; 1778 type = op->tpe; 1779 ip->curtpe = curtype; 1780 curtype = op->curtpe; 1781 ip->cpnd = cpend; 1782 cpend = op->cpnd; 1783 ip->sunqe = sunique; 1784 sunique = op->sunqe; 1785 ip->runqe = runique; 1786 runique = op->runqe; 1787 ip->mcse = mcase; 1788 mcase = op->mcse; 1789 ip->ntflg = ntflag; 1790 ntflag = op->ntflg; 1791 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1792 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1793 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1794 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1795 ip->mapflg = mapflag; 1796 mapflag = op->mapflg; 1797 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1798 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1799 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1800 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1801 (void)xsignal(SIGINT, oldintr); 1802 if (abrtflag) { 1803 abrtflag = 0; 1804 (*oldintr)(SIGINT); 1805 } 1806 } 1807 1808 void 1809 abortpt(int notused) 1810 { 1811 1812 sigint_raised = 1; 1813 alarmtimer(0); 1814 if (fromatty) 1815 write(fileno(ttyout), "\n", 1); 1816 ptabflg++; 1817 mflag = 0; 1818 abrtflag = 0; 1819 siglongjmp(ptabort, 1); 1820 } 1821 1822 void 1823 proxtrans(const char *cmd, const char *local, const char *remote) 1824 { 1825 sigfunc volatile oldintr; 1826 int prox_type, nfnd; 1827 int volatile secndflag; 1828 char *volatile cmd2; 1829 1830 oldintr = NULL; 1831 secndflag = 0; 1832 if (strcmp(cmd, "RETR")) 1833 cmd2 = "RETR"; 1834 else 1835 cmd2 = runique ? "STOU" : "STOR"; 1836 if ((prox_type = type) == 0) { 1837 if (unix_server && unix_proxy) 1838 prox_type = TYPE_I; 1839 else 1840 prox_type = TYPE_A; 1841 } 1842 if (curtype != prox_type) 1843 changetype(prox_type, 1); 1844 if (command("PASV") != COMPLETE) { 1845 fputs("proxy server does not support third party transfers.\n", 1846 ttyout); 1847 return; 1848 } 1849 pswitch(0); 1850 if (!connected) { 1851 fputs("No primary connection.\n", ttyout); 1852 pswitch(1); 1853 code = -1; 1854 return; 1855 } 1856 if (curtype != prox_type) 1857 changetype(prox_type, 1); 1858 if (command("PORT %s", pasv) != COMPLETE) { 1859 pswitch(1); 1860 return; 1861 } 1862 if (sigsetjmp(ptabort, 1)) 1863 goto abort; 1864 oldintr = xsignal(SIGINT, abortpt); 1865 if ((restart_point && 1866 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1867 || (command("%s %s", cmd, remote) != PRELIM)) { 1868 (void)xsignal(SIGINT, oldintr); 1869 pswitch(1); 1870 return; 1871 } 1872 sleep(2); 1873 pswitch(1); 1874 secndflag++; 1875 if ((restart_point && 1876 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1877 || (command("%s %s", cmd2, local) != PRELIM)) 1878 goto abort; 1879 ptflag++; 1880 (void)getreply(0); 1881 pswitch(0); 1882 (void)getreply(0); 1883 (void)xsignal(SIGINT, oldintr); 1884 pswitch(1); 1885 ptflag = 0; 1886 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1887 return; 1888 abort: 1889 if (sigsetjmp(xferabort, 1)) { 1890 (void)xsignal(SIGINT, oldintr); 1891 return; 1892 } 1893 (void)xsignal(SIGINT, abort_squared); 1894 ptflag = 0; 1895 if (strcmp(cmd, "RETR") && !proxy) 1896 pswitch(1); 1897 else if (!strcmp(cmd, "RETR") && proxy) 1898 pswitch(0); 1899 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1900 if (command("%s %s", cmd2, local) != PRELIM) { 1901 pswitch(0); 1902 if (cpend) 1903 abort_remote(NULL); 1904 } 1905 pswitch(1); 1906 if (ptabflg) 1907 code = -1; 1908 (void)xsignal(SIGINT, oldintr); 1909 return; 1910 } 1911 if (cpend) 1912 abort_remote(NULL); 1913 pswitch(!proxy); 1914 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1915 if (command("%s %s", cmd2, local) != PRELIM) { 1916 pswitch(0); 1917 if (cpend) 1918 abort_remote(NULL); 1919 pswitch(1); 1920 if (ptabflg) 1921 code = -1; 1922 (void)xsignal(SIGINT, oldintr); 1923 return; 1924 } 1925 } 1926 if (cpend) 1927 abort_remote(NULL); 1928 pswitch(!proxy); 1929 if (cpend) { 1930 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1931 if (nfnd < 0) 1932 warn("Error aborting proxy command"); 1933 if (ptabflg) 1934 code = -1; 1935 lostpeer(0); 1936 } 1937 (void)getreply(0); 1938 (void)getreply(0); 1939 } 1940 if (proxy) 1941 pswitch(0); 1942 pswitch(1); 1943 if (ptabflg) 1944 code = -1; 1945 (void)xsignal(SIGINT, oldintr); 1946 } 1947 1948 void 1949 reset(int argc, char *argv[]) 1950 { 1951 int nfnd = 1; 1952 1953 if (argc == 0 && argv != NULL) { 1954 UPRINTF("usage: %s\n", argv[0]); 1955 code = -1; 1956 return; 1957 } 1958 while (nfnd > 0) { 1959 if ((nfnd = empty(cin, NULL, 0)) < 0) { 1960 warn("Error resetting connection"); 1961 code = -1; 1962 lostpeer(0); 1963 } else if (nfnd) 1964 (void)getreply(0); 1965 } 1966 } 1967 1968 char * 1969 gunique(const char *local) 1970 { 1971 static char new[MAXPATHLEN]; 1972 char *cp = strrchr(local, '/'); 1973 int d, count=0, len; 1974 char ext = '1'; 1975 1976 if (cp) 1977 *cp = '\0'; 1978 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 1979 if (cp) 1980 *cp = '/'; 1981 if (d < 0) { 1982 warn("Can't access `%s'", local); 1983 return (NULL); 1984 } 1985 len = strlcpy(new, local, sizeof(new)); 1986 cp = &new[len]; 1987 *cp++ = '.'; 1988 while (!d) { 1989 if (++count == 100) { 1990 fputs("runique: can't find unique file name.\n", 1991 ttyout); 1992 return (NULL); 1993 } 1994 *cp++ = ext; 1995 *cp = '\0'; 1996 if (ext == '9') 1997 ext = '0'; 1998 else 1999 ext++; 2000 if ((d = access(new, F_OK)) < 0) 2001 break; 2002 if (ext != '0') 2003 cp--; 2004 else if (*(cp - 2) == '.') 2005 *(cp - 1) = '1'; 2006 else { 2007 *(cp - 2) = *(cp - 2) + 1; 2008 cp--; 2009 } 2010 } 2011 return (new); 2012 } 2013 2014 /* 2015 * abort_squared -- 2016 * aborts abort_remote(). lostpeer() is called because if the user is 2017 * too impatient to wait or there's another problem then ftp really 2018 * needs to get back to a known state. 2019 */ 2020 void 2021 abort_squared(int dummy) 2022 { 2023 char msgbuf[100]; 2024 size_t len; 2025 2026 sigint_raised = 1; 2027 alarmtimer(0); 2028 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2029 sizeof(msgbuf)); 2030 write(fileno(ttyout), msgbuf, len); 2031 lostpeer(0); 2032 siglongjmp(xferabort, 1); 2033 } 2034 2035 void 2036 abort_remote(FILE *din) 2037 { 2038 char buf[BUFSIZ]; 2039 int nfnd; 2040 2041 if (cout == NULL) { 2042 warnx("Lost control connection for abort"); 2043 if (ptabflg) 2044 code = -1; 2045 lostpeer(0); 2046 return; 2047 } 2048 /* 2049 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2050 * after urgent byte rather than before as is protocol now 2051 */ 2052 buf[0] = IAC; 2053 buf[1] = IP; 2054 buf[2] = IAC; 2055 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2056 warn("Can't send abort message"); 2057 fprintf(cout, "%cABOR\r\n", DM); 2058 (void)fflush(cout); 2059 if ((nfnd = empty(cin, din, 10)) <= 0) { 2060 if (nfnd < 0) 2061 warn("Can't send abort message"); 2062 if (ptabflg) 2063 code = -1; 2064 lostpeer(0); 2065 } 2066 if (din && (nfnd & 2)) { 2067 while (read(fileno(din), buf, BUFSIZ) > 0) 2068 continue; 2069 } 2070 if (getreply(0) == ERROR && code == 552) { 2071 /* 552 needed for nic style abort */ 2072 (void)getreply(0); 2073 } 2074 (void)getreply(0); 2075 } 2076 2077 /* 2078 * Ensure that ai->ai_addr is NOT an IPv4 mapped address. 2079 * IPv4 mapped address complicates too many things in FTP 2080 * protocol handling, as FTP protocol is defined differently 2081 * between IPv4 and IPv6. 2082 * 2083 * This may not be the best way to handle this situation, 2084 * since the semantics of IPv4 mapped address is defined in 2085 * the kernel. There are configurations where we should use 2086 * IPv4 mapped address as native IPv6 address, not as 2087 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 2088 * 2089 * More complete solution would be to have an additional 2090 * getsockopt to grab "real" peername/sockname. "real" 2091 * peername/sockname will be AF_INET if IPv4 mapped address 2092 * is used to embed IPv4 address, and will be AF_INET6 if 2093 * we use it as native. What a mess! 2094 */ 2095 void 2096 ai_unmapped(struct addrinfo *ai) 2097 { 2098 #ifdef INET6 2099 struct sockaddr_in6 *sin6; 2100 struct sockaddr_in sin; 2101 socklen_t len; 2102 2103 if (ai->ai_family != AF_INET6) 2104 return; 2105 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2106 sizeof(sin) > ai->ai_addrlen) 2107 return; 2108 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2109 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2110 return; 2111 2112 memset(&sin, 0, sizeof(sin)); 2113 sin.sin_family = AF_INET; 2114 len = sizeof(struct sockaddr_in); 2115 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2116 sizeof(sin.sin_addr)); 2117 sin.sin_port = sin6->sin6_port; 2118 2119 ai->ai_family = AF_INET; 2120 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 2121 sin.sin_len = len; 2122 #endif 2123 memcpy(ai->ai_addr, &sin, len); 2124 ai->ai_addrlen = len; 2125 #endif 2126 } 2127 2128 #ifdef NO_USAGE 2129 void 2130 xusage(void) 2131 { 2132 fputs("Usage error\n", ttyout); 2133 } 2134 #endif 2135