ftp.c revision 223308
1/* $NetBSD: ftp.c,v 1.132 2005/05/14 15:26:43 lukem Exp $ */ 2 3/*- 4 * Copyright (c) 1996-2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39/* 40 * Copyright (c) 1985, 1989, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68/* 69 * Copyright (C) 1997 and 1998 WIDE Project. 70 * All rights reserved. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. Neither the name of the project nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97#include <sys/cdefs.h> 98#ifndef lint 99#if 0 100static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101#else 102__RCSID("$NetBSD: ftp.c,v 1.132 2005/05/14 15:26:43 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 132volatile sig_atomic_t abrtflag; 133volatile sig_atomic_t timeoutflag; 134 135sigjmp_buf ptabort; 136int ptabflg; 137int ptflag = 0; 138char pasv[BUFSIZ]; /* passive port for proxy data connection */ 139 140static int empty(FILE *, FILE *, int); 141 142struct sockinet { 143 union sockunion { 144 struct sockaddr_in su_sin; 145#ifdef INET6 146 struct sockaddr_in6 su_sin6; 147#endif 148 } si_su; 149#if !HAVE_SOCKADDR_SA_LEN 150 int si_len; 151#endif 152}; 153 154#if !HAVE_SOCKADDR_SA_LEN 155# define su_len si_len 156#else 157# define su_len si_su.su_sin.sin_len 158#endif 159#define su_family si_su.su_sin.sin_family 160#define su_port si_su.su_sin.sin_port 161 162struct sockinet myctladdr, hisctladdr, data_addr; 163 164char * 165hookup(char *host, char *port) 166{ 167 int s = -1, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 char *cause = "unknown"; 172 socklen_t len; 173 int on = 1; 174 175 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 176 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 177 memset(&hints, 0, sizeof(hints)); 178 portnum = parseport(port, FTP_PORT); 179 hints.ai_flags = AI_CANONNAME; 180 hints.ai_family = family; 181 hints.ai_socktype = SOCK_STREAM; 182 hints.ai_protocol = 0; 183 error = getaddrinfo(host, NULL, &hints, &res0); 184 if (error) { 185 warnx("%s", gai_strerror(error)); 186 code = -1; 187 return (0); 188 } 189 190 if (res0->ai_canonname) 191 (void)strlcpy(hostnamebuf, res0->ai_canonname, 192 sizeof(hostnamebuf)); 193 else 194 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 195 hostname = hostnamebuf; 196 197 for (res = res0; res; res = res->ai_next) { 198 /* 199 * make sure that ai_addr is NOT an IPv4 mapped address. 200 * IPv4 mapped address complicates too many things in FTP 201 * protocol handling, as FTP protocol is defined differently 202 * between IPv4 and IPv6. 203 * 204 * This may not be the best way to handle this situation, 205 * since the semantics of IPv4 mapped address is defined in 206 * the kernel. There are configurations where we should use 207 * IPv4 mapped address as native IPv6 address, not as 208 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 209 * 210 * More complete solution would be to have an additional 211 * getsockopt to grab "real" peername/sockname. "real" 212 * peername/sockname will be AF_INET if IPv4 mapped address 213 * is used to embed IPv4 address, and will be AF_INET6 if 214 * we use it as native. What a mess! 215 */ 216 ai_unmapped(res); 217#if 0 /*old behavior*/ 218 if (res != res0) /* not on the first address */ 219#else 220 if (res0->ai_next) /* if we have multiple possibilities */ 221#endif 222 { 223 if (getnameinfo(res->ai_addr, res->ai_addrlen, 224 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 225 strlcpy(hbuf, "?", sizeof(hbuf)); 226 fprintf(ttyout, "Trying %s...\n", hbuf); 227 } 228 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 229 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 230 if (s < 0) { 231 cause = "socket"; 232 continue; 233 } 234 error = xconnect(s, res->ai_addr, res->ai_addrlen); 235 if (error) { 236 /* this "if" clause is to prevent print warning twice */ 237 if (res->ai_next) { 238 if (getnameinfo(res->ai_addr, res->ai_addrlen, 239 hbuf, sizeof(hbuf), NULL, 0, 240 NI_NUMERICHOST)) 241 strlcpy(hbuf, "?", sizeof(hbuf)); 242 warn("connect to address %s", hbuf); 243 } 244 cause = "connect"; 245 close(s); 246 s = -1; 247 continue; 248 } 249 250 /* finally we got one */ 251 break; 252 } 253 if (s < 0) { 254 warn("%s", cause); 255 code = -1; 256 freeaddrinfo(res0); 257 return 0; 258 } 259 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 260 hisctladdr.su_len = res->ai_addrlen; 261 freeaddrinfo(res0); 262 res0 = res = NULL; 263 264 len = hisctladdr.su_len; 265 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 266 warn("getsockname"); 267 code = -1; 268 goto bad; 269 } 270 myctladdr.su_len = len; 271 272#ifdef IPTOS_LOWDELAY 273 if (hisctladdr.su_family == AF_INET) { 274 int tos = IPTOS_LOWDELAY; 275 if (setsockopt(s, IPPROTO_IP, IP_TOS, 276 (void *)&tos, sizeof(tos)) == -1) { 277 if (debug) 278 warn("setsockopt %s (ignored)", 279 "IPTOS_LOWDELAY"); 280 } 281 } 282#endif 283 cin = fdopen(s, "r"); 284 cout = fdopen(s, "w"); 285 if (cin == NULL || cout == NULL) { 286 warnx("fdopen failed."); 287 if (cin) 288 (void)fclose(cin); 289 if (cout) 290 (void)fclose(cout); 291 code = -1; 292 goto bad; 293 } 294 if (verbose) 295 fprintf(ttyout, "Connected to %s.\n", hostname); 296 if (getreply(0) > 2) { /* read startup message from server */ 297 if (cin) 298 (void)fclose(cin); 299 if (cout) 300 (void)fclose(cout); 301 code = -1; 302 goto bad; 303 } 304 305 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 306 (void *)&on, sizeof(on)) == -1) { 307 if (debug) 308 warn("setsockopt %s (ignored)", "SO_OOBINLINE"); 309 } 310 311 return (hostname); 312 bad: 313 (void)close(s); 314 return (NULL); 315} 316 317void 318cmdabort(int notused) 319{ 320 int oerrno = errno; 321 322 sigint_raised = 1; 323 alarmtimer(0); 324 if (fromatty) 325 write(fileno(ttyout), "\n", 1); 326 abrtflag++; 327 if (ptflag) 328 siglongjmp(ptabort, 1); 329 errno = oerrno; 330} 331 332void 333cmdtimeout(int notused) 334{ 335 int oerrno = errno; 336 337 alarmtimer(0); 338 if (fromatty) 339 write(fileno(ttyout), "\n", 1); 340 timeoutflag++; 341 if (ptflag) 342 siglongjmp(ptabort, 1); 343 errno = oerrno; 344} 345 346/*VARARGS*/ 347int 348command(const char *fmt, ...) 349{ 350 va_list ap; 351 int r; 352 sigfunc oldsigint; 353 354 if (debug) { 355 fputs("---> ", ttyout); 356 va_start(ap, fmt); 357 if (strncmp("PASS ", fmt, 5) == 0) 358 fputs("PASS XXXX", ttyout); 359 else if (strncmp("ACCT ", fmt, 5) == 0) 360 fputs("ACCT XXXX", ttyout); 361 else 362 vfprintf(ttyout, fmt, ap); 363 va_end(ap); 364 putc('\n', ttyout); 365 } 366 if (cout == NULL) { 367 warnx("No control connection for command."); 368 code = -1; 369 return (0); 370 } 371 372 abrtflag = 0; 373 374 oldsigint = xsignal(SIGINT, cmdabort); 375 376 va_start(ap, fmt); 377 vfprintf(cout, fmt, ap); 378 va_end(ap); 379 fputs("\r\n", cout); 380 (void)fflush(cout); 381 cpend = 1; 382 r = getreply(!strcmp(fmt, "QUIT")); 383 if (abrtflag && oldsigint != SIG_IGN) 384 (*oldsigint)(SIGINT); 385 (void)xsignal(SIGINT, oldsigint); 386 return (r); 387} 388 389int 390getreply(int expecteof) 391{ 392 char current_line[BUFSIZ]; /* last line of previous reply */ 393 int c, n, line; 394 int dig; 395 int originalcode = 0, continuation = 0; 396 sigfunc oldsigint, oldsigalrm; 397 int pflag = 0; 398 char *cp, *pt = pasv; 399 400 abrtflag = 0; 401 timeoutflag = 0; 402 403 oldsigint = xsignal(SIGINT, cmdabort); 404 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 405 406 for (line = 0 ;; line++) { 407 dig = n = code = 0; 408 cp = current_line; 409 while (alarmtimer(60),((c = getc(cin)) != '\n')) { 410 if (c == IAC) { /* handle telnet commands */ 411 switch (c = getc(cin)) { 412 case WILL: 413 case WONT: 414 c = getc(cin); 415 fprintf(cout, "%c%c%c", IAC, DONT, c); 416 (void)fflush(cout); 417 break; 418 case DO: 419 case DONT: 420 c = getc(cin); 421 fprintf(cout, "%c%c%c", IAC, WONT, c); 422 (void)fflush(cout); 423 break; 424 default: 425 break; 426 } 427 continue; 428 } 429 dig++; 430 if (c == EOF) { 431 /* 432 * these will get trashed by pswitch() 433 * in lostpeer() 434 */ 435 int reply_timeoutflag = timeoutflag; 436 int reply_abrtflag = abrtflag; 437 438 alarmtimer(0); 439 if (expecteof && feof(cin)) { 440 (void)xsignal(SIGINT, oldsigint); 441 (void)xsignal(SIGALRM, oldsigalrm); 442 code = 221; 443 return (0); 444 } 445 cpend = 0; 446 lostpeer(0); 447 if (verbose) { 448 if (reply_timeoutflag) 449 fputs( 450 "421 Service not available, remote server timed out. Connection closed\n", 451 ttyout); 452 else if (reply_abrtflag) 453 fputs( 454 "421 Service not available, user interrupt. Connection closed.\n", 455 ttyout); 456 else 457 fputs( 458 "421 Service not available, remote server has closed connection.\n", 459 ttyout); 460 (void)fflush(ttyout); 461 } 462 code = 421; 463 (void)xsignal(SIGINT, oldsigint); 464 (void)xsignal(SIGALRM, oldsigalrm); 465 return (4); 466 } 467 if (c != '\r' && (verbose > 0 || 468 ((verbose > -1 && n == '5' && dig > 4) && 469 (((!n && c < '5') || (n && n < '5')) 470 || !retry_connect)))) { 471 if (proxflag && 472 (dig == 1 || (dig == 5 && verbose == 0))) 473 fprintf(ttyout, "%s:", hostname); 474 (void)putc(c, ttyout); 475 } 476 if (dig < 4 && isdigit(c)) 477 code = code * 10 + (c - '0'); 478 if (!pflag && (code == 227 || code == 228)) 479 pflag = 1; 480 else if (!pflag && code == 229) 481 pflag = 100; 482 if (dig > 4 && pflag == 1 && isdigit(c)) 483 pflag = 2; 484 if (pflag == 2) { 485 if (c != '\r' && c != ')') { 486 if (pt < &pasv[sizeof(pasv) - 1]) 487 *pt++ = c; 488 } else { 489 *pt = '\0'; 490 pflag = 3; 491 } 492 } 493 if (pflag == 100 && c == '(') 494 pflag = 2; 495 if (dig == 4 && c == '-') { 496 if (continuation) 497 code = 0; 498 continuation++; 499 } 500 if (n == 0) 501 n = c; 502 if (cp < ¤t_line[sizeof(current_line) - 1]) 503 *cp++ = c; 504 } 505 if (verbose > 0 || ((verbose > -1 && n == '5') && 506 (n < '5' || !retry_connect))) { 507 (void)putc(c, ttyout); 508 (void)fflush (ttyout); 509 } 510 if (cp[-1] == '\r') 511 cp[-1] = '\0'; 512 *cp = '\0'; 513 if (line == 0) 514 (void)strlcpy(reply_string, current_line, 515 sizeof(reply_string)); 516 if (line > 0 && code == 0 && reply_callback != NULL) 517 (*reply_callback)(current_line); 518 if (continuation && code != originalcode) { 519 if (originalcode == 0) 520 originalcode = code; 521 continue; 522 } 523 if (n != '1') 524 cpend = 0; 525 alarmtimer(0); 526 (void)xsignal(SIGINT, oldsigint); 527 (void)xsignal(SIGALRM, oldsigalrm); 528 if (code == 421 || originalcode == 421) 529 lostpeer(0); 530 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 531 (*oldsigint)(SIGINT); 532 if (timeoutflag && oldsigalrm != cmdtimeout && 533 oldsigalrm != SIG_IGN) 534 (*oldsigalrm)(SIGINT); 535 return (n - '0'); 536 } 537} 538 539static int 540empty(FILE *cin, FILE *din, int sec) 541{ 542 int nr, nfd; 543 struct pollfd pfd[2]; 544 545 nfd = 0; 546 if (cin) { 547 pfd[nfd].fd = fileno(cin); 548 pfd[nfd++].events = POLLIN; 549 } 550 551 if (din) { 552 pfd[nfd].fd = fileno(din); 553 pfd[nfd++].events = POLLIN; 554 } 555 556 if ((nr = xpoll(pfd, nfd, sec * 1000)) <= 0) 557 return nr; 558 559 nr = 0; 560 nfd = 0; 561 if (cin) 562 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 563 if (din) 564 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 565 return nr; 566} 567 568sigjmp_buf xferabort; 569 570void 571abortxfer(int notused) 572{ 573 char msgbuf[100]; 574 size_t len; 575 576 sigint_raised = 1; 577 alarmtimer(0); 578 mflag = 0; 579 abrtflag = 0; 580 switch (direction[0]) { 581 case 'r': 582 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 583 break; 584 case 's': 585 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 586 break; 587 default: 588 errx(1, "abortxfer called with unknown direction `%s'", 589 direction); 590 } 591 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 592 sizeof(msgbuf)); 593 write(fileno(ttyout), msgbuf, len); 594 siglongjmp(xferabort, 1); 595} 596 597void 598sendrequest(const char *cmd, const char *local, const char *remote, 599 int printnames) 600{ 601 struct stat st; 602 int c, d; 603 FILE *fin, *dout; 604 int (*closefunc)(FILE *); 605 sigfunc oldintr, oldintp; 606 volatile off_t hashbytes; 607 char *lmode, *bufp; 608 static size_t bufsize; 609 static char *buf; 610 int oprogress; 611 612#ifdef __GNUC__ /* to shut up gcc warnings */ 613 (void)&fin; 614 (void)&dout; 615 (void)&closefunc; 616 (void)&oldintr; 617 (void)&oldintp; 618 (void)&lmode; 619#endif 620 621 hashbytes = mark; 622 direction = "sent"; 623 dout = NULL; 624 bytes = 0; 625 filesize = -1; 626 oprogress = progress; 627 if (verbose && printnames) { 628 if (local && *local != '-') 629 fprintf(ttyout, "local: %s ", local); 630 if (remote) 631 fprintf(ttyout, "remote: %s\n", remote); 632 } 633 if (proxy) { 634 proxtrans(cmd, local, remote); 635 return; 636 } 637 if (curtype != type) 638 changetype(type, 0); 639 closefunc = NULL; 640 oldintr = NULL; 641 oldintp = NULL; 642 lmode = "w"; 643 if (sigsetjmp(xferabort, 1)) { 644 while (cpend) 645 (void)getreply(0); 646 code = -1; 647 goto cleanupsend; 648 } 649 (void)xsignal(SIGQUIT, psummary); 650 oldintr = xsignal(SIGINT, abortxfer); 651 if (strcmp(local, "-") == 0) { 652 fin = stdin; 653 progress = 0; 654 } else if (*local == '|') { 655 oldintp = xsignal(SIGPIPE, SIG_IGN); 656 fin = popen(local + 1, "r"); 657 if (fin == NULL) { 658 warn("%s", local + 1); 659 code = -1; 660 goto cleanupsend; 661 } 662 progress = 0; 663 closefunc = pclose; 664 } else { 665 fin = fopen(local, "r"); 666 if (fin == NULL) { 667 warn("local: %s", local); 668 code = -1; 669 goto cleanupsend; 670 } 671 closefunc = fclose; 672 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 673 fprintf(ttyout, "%s: not a plain file.\n", local); 674 code = -1; 675 goto cleanupsend; 676 } 677 filesize = st.st_size; 678 } 679 if (initconn()) { 680 code = -1; 681 goto cleanupsend; 682 } 683 if (sigsetjmp(xferabort, 1)) 684 goto abort; 685 686 if (restart_point && 687 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 688 int rc; 689 690 rc = -1; 691 switch (curtype) { 692 case TYPE_A: 693 rc = fseeko(fin, restart_point, SEEK_SET); 694 break; 695 case TYPE_I: 696 case TYPE_L: 697 rc = lseek(fileno(fin), restart_point, SEEK_SET); 698 break; 699 } 700 if (rc < 0) { 701 warn("local: %s", local); 702 goto cleanupsend; 703 } 704 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 705 goto cleanupsend; 706 lmode = "r+"; 707 } 708 if (remote) { 709 if (command("%s %s", cmd, remote) != PRELIM) 710 goto cleanupsend; 711 } else { 712 if (command("%s", cmd) != PRELIM) 713 goto cleanupsend; 714 } 715 dirchange = 1; 716 dout = dataconn(lmode); 717 if (dout == NULL) 718 goto abort; 719 720 if (sndbuf_size > bufsize) { 721 if (buf) 722 (void)free(buf); 723 bufsize = sndbuf_size; 724 buf = xmalloc(bufsize); 725 } 726 727 progressmeter(-1); 728 oldintp = xsignal(SIGPIPE, SIG_IGN); 729 730 switch (curtype) { 731 732 case TYPE_I: 733 case TYPE_L: 734 if (rate_put) { /* rate limited */ 735 while (1) { 736 struct timeval then, now, td; 737 off_t bufrem; 738 739 (void)gettimeofday(&then, NULL); 740 errno = c = d = 0; 741 bufrem = rate_put; 742 while (bufrem > 0) { 743 if ((c = read(fileno(fin), buf, 744 MIN(bufsize, bufrem))) <= 0) 745 goto senddone; 746 bytes += c; 747 bufrem -= c; 748 for (bufp = buf; c > 0; 749 c -= d, bufp += d) 750 if ((d = write(fileno(dout), 751 bufp, c)) <= 0) 752 break; 753 if (d < 0) 754 goto senddone; 755 if (hash && 756 (!progress || filesize < 0) ) { 757 while (bytes >= hashbytes) { 758 (void)putc('#', ttyout); 759 hashbytes += mark; 760 } 761 (void)fflush(ttyout); 762 } 763 } 764 while (1) { 765 (void)gettimeofday(&now, NULL); 766 timersub(&now, &then, &td); 767 if (td.tv_sec > 0) 768 break; 769 usleep(1000000 - td.tv_usec); 770 } 771 } 772 } else { /* simpler/faster; no rate limit */ 773 while (1) { 774 errno = c = d = 0; 775 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 776 goto senddone; 777 bytes += c; 778 for (bufp = buf; c > 0; c -= d, bufp += d) 779 if ((d = write(fileno(dout), bufp, c)) 780 <= 0) 781 break; 782 if (d < 0) 783 goto senddone; 784 if (hash && (!progress || filesize < 0) ) { 785 while (bytes >= hashbytes) { 786 (void)putc('#', ttyout); 787 hashbytes += mark; 788 } 789 (void)fflush(ttyout); 790 } 791 } 792 } 793 senddone: 794 if (hash && (!progress || filesize < 0) && bytes > 0) { 795 if (bytes < mark) 796 (void)putc('#', ttyout); 797 (void)putc('\n', ttyout); 798 } 799 if (c < 0) 800 warn("local: %s", local); 801 if (d < 0) { 802 if (errno != EPIPE) 803 warn("netout"); 804 bytes = -1; 805 } 806 break; 807 808 case TYPE_A: 809 while ((c = getc(fin)) != EOF) { 810 if (c == '\n') { 811 while (hash && (!progress || filesize < 0) && 812 (bytes >= hashbytes)) { 813 (void)putc('#', ttyout); 814 (void)fflush(ttyout); 815 hashbytes += mark; 816 } 817 if (ferror(dout)) 818 break; 819 (void)putc('\r', dout); 820 bytes++; 821 } 822 (void)putc(c, dout); 823 bytes++; 824#if 0 /* this violates RFC */ 825 if (c == '\r') { 826 (void)putc('\0', dout); 827 bytes++; 828 } 829#endif 830 } 831 if (hash && (!progress || filesize < 0)) { 832 if (bytes < hashbytes) 833 (void)putc('#', ttyout); 834 (void)putc('\n', ttyout); 835 } 836 if (ferror(fin)) 837 warn("local: %s", local); 838 if (ferror(dout)) { 839 if (errno != EPIPE) 840 warn("netout"); 841 bytes = -1; 842 } 843 break; 844 } 845 846 progressmeter(1); 847 if (closefunc != NULL) { 848 (*closefunc)(fin); 849 fin = NULL; 850 } 851 (void)fclose(dout); 852 dout = NULL; 853 (void)getreply(0); 854 if (bytes > 0) 855 ptransfer(0); 856 goto cleanupsend; 857 858 abort: 859 (void)xsignal(SIGINT, oldintr); 860 oldintr = NULL; 861 if (!cpend) { 862 code = -1; 863 goto cleanupsend; 864 } 865 if (data >= 0) { 866 (void)close(data); 867 data = -1; 868 } 869 if (dout) { 870 (void)fclose(dout); 871 dout = NULL; 872 } 873 (void)getreply(0); 874 code = -1; 875 if (bytes > 0) 876 ptransfer(0); 877 878 cleanupsend: 879 if (oldintr) 880 (void)xsignal(SIGINT, oldintr); 881 if (oldintp) 882 (void)xsignal(SIGPIPE, oldintp); 883 if (data >= 0) { 884 (void)close(data); 885 data = -1; 886 } 887 if (closefunc != NULL && fin != NULL) 888 (*closefunc)(fin); 889 if (dout) 890 (void)fclose(dout); 891 progress = oprogress; 892 restart_point = 0; 893 bytes = 0; 894} 895 896void 897recvrequest(const char *cmd, const char *local, const char *remote, 898 const char *lmode, int printnames, int ignorespecial) 899{ 900 FILE *fout, *din; 901 int (*closefunc)(FILE *); 902 sigfunc oldintr, oldintp; 903 int c, d; 904 volatile int is_retr, tcrflag, bare_lfs; 905 static size_t bufsize; 906 static char *buf; 907 volatile off_t hashbytes; 908 struct stat st; 909 time_t mtime; 910 struct timeval tval[2]; 911 int oprogress; 912 int opreserve; 913 914#ifdef __GNUC__ /* to shut up gcc warnings */ 915 (void)&local; 916 (void)&fout; 917 (void)&din; 918 (void)&closefunc; 919 (void)&oldintr; 920 (void)&oldintp; 921#endif 922 923 fout = NULL; 924 din = NULL; 925 hashbytes = mark; 926 direction = "received"; 927 bytes = 0; 928 bare_lfs = 0; 929 filesize = -1; 930 oprogress = progress; 931 opreserve = preserve; 932 is_retr = (strcmp(cmd, "RETR") == 0); 933 if (is_retr && verbose && printnames) { 934 if (local && (ignorespecial || *local != '-')) 935 fprintf(ttyout, "local: %s ", local); 936 if (remote) 937 fprintf(ttyout, "remote: %s\n", remote); 938 } 939 if (proxy && is_retr) { 940 proxtrans(cmd, local, remote); 941 return; 942 } 943 closefunc = NULL; 944 oldintr = NULL; 945 oldintp = NULL; 946 tcrflag = !crflag && is_retr; 947 if (sigsetjmp(xferabort, 1)) { 948 while (cpend) 949 (void)getreply(0); 950 code = -1; 951 goto cleanuprecv; 952 } 953 (void)xsignal(SIGQUIT, psummary); 954 oldintr = xsignal(SIGINT, abortxfer); 955 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 956 if (access(local, W_OK) < 0) { 957 char *dir = strrchr(local, '/'); 958 959 if (errno != ENOENT && errno != EACCES) { 960 warn("local: %s", local); 961 code = -1; 962 goto cleanuprecv; 963 } 964 if (dir != NULL) 965 *dir = 0; 966 d = access(dir == local ? "/" : 967 dir ? local : ".", W_OK); 968 if (dir != NULL) 969 *dir = '/'; 970 if (d < 0) { 971 warn("local: %s", local); 972 code = -1; 973 goto cleanuprecv; 974 } 975 if (!runique && errno == EACCES && 976 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 977 warn("local: %s", local); 978 code = -1; 979 goto cleanuprecv; 980 } 981 if (runique && errno == EACCES && 982 (local = gunique(local)) == NULL) { 983 code = -1; 984 goto cleanuprecv; 985 } 986 } 987 else if (runique && (local = gunique(local)) == NULL) { 988 code = -1; 989 goto cleanuprecv; 990 } 991 } 992 if (!is_retr) { 993 if (curtype != TYPE_A) 994 changetype(TYPE_A, 0); 995 } else { 996 if (curtype != type) 997 changetype(type, 0); 998 filesize = remotesize(remote, 0); 999 if (code == 421 || code == -1) 1000 goto cleanuprecv; 1001 } 1002 if (initconn()) { 1003 code = -1; 1004 goto cleanuprecv; 1005 } 1006 if (sigsetjmp(xferabort, 1)) 1007 goto abort; 1008 if (is_retr && restart_point && 1009 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1010 goto cleanuprecv; 1011 if (! EMPTYSTRING(remote)) { 1012 if (command("%s %s", cmd, remote) != PRELIM) 1013 goto cleanuprecv; 1014 } else { 1015 if (command("%s", cmd) != PRELIM) 1016 goto cleanuprecv; 1017 } 1018 din = dataconn("r"); 1019 if (din == NULL) 1020 goto abort; 1021 if (!ignorespecial && strcmp(local, "-") == 0) { 1022 fout = stdout; 1023 progress = 0; 1024 preserve = 0; 1025 } else if (!ignorespecial && *local == '|') { 1026 oldintp = xsignal(SIGPIPE, SIG_IGN); 1027 fout = popen(local + 1, "w"); 1028 if (fout == NULL) { 1029 warn("%s", local+1); 1030 goto abort; 1031 } 1032 progress = 0; 1033 preserve = 0; 1034 closefunc = pclose; 1035 } else { 1036 fout = fopen(local, lmode); 1037 if (fout == NULL) { 1038 warn("local: %s", local); 1039 goto abort; 1040 } 1041 closefunc = fclose; 1042 } 1043 1044 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1045 progress = 0; 1046 preserve = 0; 1047 } 1048 if (rcvbuf_size > bufsize) { 1049 if (buf) 1050 (void)free(buf); 1051 bufsize = rcvbuf_size; 1052 buf = xmalloc(bufsize); 1053 } 1054 1055 progressmeter(-1); 1056 1057 switch (curtype) { 1058 1059 case TYPE_I: 1060 case TYPE_L: 1061 if (is_retr && restart_point && 1062 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1063 warn("local: %s", local); 1064 goto cleanuprecv; 1065 } 1066 if (rate_get) { /* rate limiting */ 1067 while (1) { 1068 struct timeval then, now, td; 1069 off_t bufrem; 1070 1071 (void)gettimeofday(&then, NULL); 1072 errno = c = d = 0; 1073 for (bufrem = rate_get; bufrem > 0; ) { 1074 if ((c = read(fileno(din), buf, 1075 MIN(bufsize, bufrem))) <= 0) 1076 goto recvdone; 1077 bytes += c; 1078 bufrem -=c; 1079 if ((d = write(fileno(fout), buf, c)) 1080 != c) 1081 goto recvdone; 1082 if (hash && 1083 (!progress || filesize < 0)) { 1084 while (bytes >= hashbytes) { 1085 (void)putc('#', ttyout); 1086 hashbytes += mark; 1087 } 1088 (void)fflush(ttyout); 1089 } 1090 } 1091 /* sleep until time is up */ 1092 while (1) { 1093 (void)gettimeofday(&now, NULL); 1094 timersub(&now, &then, &td); 1095 if (td.tv_sec > 0) 1096 break; 1097 usleep(1000000 - td.tv_usec); 1098 } 1099 } 1100 } else { /* faster code (no limiting) */ 1101 while (1) { 1102 errno = c = d = 0; 1103 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1104 goto recvdone; 1105 bytes += c; 1106 if ((d = write(fileno(fout), buf, c)) != c) 1107 goto recvdone; 1108 if (hash && (!progress || filesize < 0)) { 1109 while (bytes >= hashbytes) { 1110 (void)putc('#', ttyout); 1111 hashbytes += mark; 1112 } 1113 (void)fflush(ttyout); 1114 } 1115 } 1116 } 1117 recvdone: 1118 if (hash && (!progress || filesize < 0) && bytes > 0) { 1119 if (bytes < mark) 1120 (void)putc('#', ttyout); 1121 (void)putc('\n', ttyout); 1122 } 1123 if (c < 0) { 1124 if (errno != EPIPE) 1125 warn("netin"); 1126 bytes = -1; 1127 } 1128 if (d < c) { 1129 if (d < 0) 1130 warn("local: %s", local); 1131 else 1132 warnx("%s: short write", local); 1133 } 1134 break; 1135 1136 case TYPE_A: 1137 if (is_retr && restart_point) { 1138 int ch; 1139 off_t i; 1140 1141 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1142 goto done; 1143 for (i = 0; i++ < restart_point;) { 1144 if ((ch = getc(fout)) == EOF) 1145 goto done; 1146 if (ch == '\n') 1147 i++; 1148 } 1149 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1150 done: 1151 warn("local: %s", local); 1152 goto cleanuprecv; 1153 } 1154 } 1155 while ((c = getc(din)) != EOF) { 1156 if (c == '\n') 1157 bare_lfs++; 1158 while (c == '\r') { 1159 while (hash && (!progress || filesize < 0) && 1160 (bytes >= hashbytes)) { 1161 (void)putc('#', ttyout); 1162 (void)fflush(ttyout); 1163 hashbytes += mark; 1164 } 1165 bytes++; 1166 if ((c = getc(din)) != '\n' || tcrflag) { 1167 if (ferror(fout)) 1168 goto break2; 1169 (void)putc('\r', fout); 1170 if (c == '\0') { 1171 bytes++; 1172 goto contin2; 1173 } 1174 if (c == EOF) 1175 goto contin2; 1176 } 1177 } 1178 (void)putc(c, fout); 1179 bytes++; 1180 contin2: ; 1181 } 1182 break2: 1183 if (hash && (!progress || filesize < 0)) { 1184 if (bytes < hashbytes) 1185 (void)putc('#', ttyout); 1186 (void)putc('\n', ttyout); 1187 } 1188 if (ferror(din)) { 1189 if (errno != EPIPE) 1190 warn("netin"); 1191 bytes = -1; 1192 } 1193 if (ferror(fout)) 1194 warn("local: %s", local); 1195 break; 1196 } 1197 1198 progressmeter(1); 1199 if (closefunc != NULL) { 1200 (*closefunc)(fout); 1201 fout = NULL; 1202 } 1203 (void)fclose(din); 1204 din = NULL; 1205 (void)getreply(0); 1206 if (bare_lfs) { 1207 fprintf(ttyout, 1208 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1209 bare_lfs); 1210 fputs("File may not have transferred correctly.\n", ttyout); 1211 } 1212 if (bytes >= 0 && is_retr) { 1213 if (bytes > 0) 1214 ptransfer(0); 1215 if (preserve && (closefunc == fclose)) { 1216 mtime = remotemodtime(remote, 0); 1217 if (mtime != -1) { 1218 (void)gettimeofday(&tval[0], NULL); 1219 tval[1].tv_sec = mtime; 1220 tval[1].tv_usec = 0; 1221 if (utimes(local, tval) == -1) { 1222 fprintf(ttyout, 1223 "Can't change modification time on %s to %s", 1224 local, asctime(localtime(&mtime))); 1225 } 1226 } 1227 } 1228 } 1229 goto cleanuprecv; 1230 1231 abort: 1232 /* 1233 * abort using RFC 959 recommended IP,SYNC sequence 1234 */ 1235 if (! sigsetjmp(xferabort, 1)) { 1236 /* this is the first call */ 1237 (void)xsignal(SIGINT, abort_squared); 1238 if (!cpend) { 1239 code = -1; 1240 goto cleanuprecv; 1241 } 1242 abort_remote(din); 1243 } 1244 code = -1; 1245 if (bytes > 0) 1246 ptransfer(0); 1247 1248 cleanuprecv: 1249 if (oldintr) 1250 (void)xsignal(SIGINT, oldintr); 1251 if (oldintp) 1252 (void)xsignal(SIGPIPE, oldintp); 1253 if (data >= 0) { 1254 (void)close(data); 1255 data = -1; 1256 } 1257 if (closefunc != NULL && fout != NULL) 1258 (*closefunc)(fout); 1259 if (din) 1260 (void)fclose(din); 1261 progress = oprogress; 1262 preserve = opreserve; 1263 bytes = 0; 1264} 1265 1266/* 1267 * Need to start a listen on the data channel before we send the command, 1268 * otherwise the server's connect may fail. 1269 */ 1270int 1271initconn(void) 1272{ 1273 char *p, *a; 1274 int result, tmpno = 0; 1275 int on = 1; 1276 int error; 1277 u_int addr[16], port[2]; 1278 u_int af, hal, pal; 1279 socklen_t len; 1280 char *pasvcmd = NULL; 1281 1282#ifdef INET6 1283 if (myctladdr.su_family == AF_INET6 && debug && 1284 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1285 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1286 warnx("use of scoped address can be troublesome"); 1287 } 1288#endif 1289 reinit: 1290 if (passivemode) { 1291 data_addr = myctladdr; 1292 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1293 if (data < 0) { 1294 warn("socket"); 1295 return (1); 1296 } 1297 if ((options & SO_DEBUG) && 1298 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1299 (void *)&on, sizeof(on)) == -1) { 1300 if (debug) 1301 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1302 } 1303 result = COMPLETE + 1; 1304 switch (data_addr.su_family) { 1305 case AF_INET: 1306 if (epsv4 && !epsv4bad) { 1307 pasvcmd = "EPSV"; 1308 result = command("EPSV"); 1309 if (!connected) 1310 return (1); 1311 /* 1312 * this code is to be friendly with broken 1313 * BSDI ftpd 1314 */ 1315 if (code / 10 == 22 && code != 229) { 1316 fputs( 1317"wrong server: return code must be 229\n", 1318 ttyout); 1319 result = COMPLETE + 1; 1320 } 1321 if (result != COMPLETE) { 1322 epsv4bad = 1; 1323 if (debug) 1324 fputs( 1325 "disabling epsv4 for this connection\n", 1326 ttyout); 1327 } 1328 } 1329 if (result != COMPLETE) { 1330 pasvcmd = "PASV"; 1331 result = command("PASV"); 1332 if (!connected) 1333 return (1); 1334 } 1335 break; 1336#ifdef INET6 1337 case AF_INET6: 1338 pasvcmd = "EPSV"; 1339 result = command("EPSV"); 1340 if (!connected) 1341 return (1); 1342 /* this code is to be friendly with broken BSDI ftpd */ 1343 if (code / 10 == 22 && code != 229) { 1344 fputs( 1345"wrong server: return code must be 229\n", 1346 ttyout); 1347 result = COMPLETE + 1; 1348 } 1349 if (result != COMPLETE) { 1350 pasvcmd = "LPSV"; 1351 result = command("LPSV"); 1352 } 1353 if (!connected) 1354 return (1); 1355 break; 1356#endif 1357 default: 1358 result = COMPLETE + 1; 1359 break; 1360 } 1361 if (result != COMPLETE) { 1362 if (activefallback) { 1363 (void)close(data); 1364 data = -1; 1365 passivemode = 0; 1366#if 0 1367 activefallback = 0; 1368#endif 1369 goto reinit; 1370 } 1371 fputs("Passive mode refused.\n", ttyout); 1372 goto bad; 1373 } 1374 1375#define pack2(var, off) \ 1376 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1377#define pack4(var, off) \ 1378 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1379 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1380#define UC(b) (((int)b)&0xff) 1381 1382 /* 1383 * What we've got at this point is a string of comma separated 1384 * one-byte unsigned integer values, separated by commas. 1385 */ 1386 if (strcmp(pasvcmd, "PASV") == 0) { 1387 if (data_addr.su_family != AF_INET) { 1388 fputs( 1389 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1390 error = 1; 1391 goto bad; 1392 } 1393 if (code / 10 == 22 && code != 227) { 1394 fputs("wrong server: return code must be 227\n", 1395 ttyout); 1396 error = 1; 1397 goto bad; 1398 } 1399 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1400 &addr[0], &addr[1], &addr[2], &addr[3], 1401 &port[0], &port[1]); 1402 if (error != 6) { 1403 fputs( 1404"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1405 error = 1; 1406 goto bad; 1407 } 1408 error = 0; 1409 memset(&data_addr, 0, sizeof(data_addr)); 1410 data_addr.su_family = AF_INET; 1411 data_addr.su_len = sizeof(struct sockaddr_in); 1412 data_addr.si_su.su_sin.sin_addr.s_addr = 1413 htonl(pack4(addr, 0)); 1414 data_addr.su_port = htons(pack2(port, 0)); 1415 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1416 if (code / 10 == 22 && code != 228) { 1417 fputs("wrong server: return code must be 228\n", 1418 ttyout); 1419 error = 1; 1420 goto bad; 1421 } 1422 switch (data_addr.su_family) { 1423 case AF_INET: 1424 error = sscanf(pasv, 1425"%u,%u,%u,%u,%u,%u,%u,%u,%u", 1426 &af, &hal, 1427 &addr[0], &addr[1], &addr[2], &addr[3], 1428 &pal, &port[0], &port[1]); 1429 if (error != 9) { 1430 fputs( 1431"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1432 error = 1; 1433 goto bad; 1434 } 1435 if (af != 4 || hal != 4 || pal != 2) { 1436 fputs( 1437"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1438 error = 1; 1439 goto bad; 1440 } 1441 1442 error = 0; 1443 memset(&data_addr, 0, sizeof(data_addr)); 1444 data_addr.su_family = AF_INET; 1445 data_addr.su_len = sizeof(struct sockaddr_in); 1446 data_addr.si_su.su_sin.sin_addr.s_addr = 1447 htonl(pack4(addr, 0)); 1448 data_addr.su_port = htons(pack2(port, 0)); 1449 break; 1450#ifdef INET6 1451 case AF_INET6: 1452 error = sscanf(pasv, 1453"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1454 &af, &hal, 1455 &addr[0], &addr[1], &addr[2], &addr[3], 1456 &addr[4], &addr[5], &addr[6], &addr[7], 1457 &addr[8], &addr[9], &addr[10], 1458 &addr[11], &addr[12], &addr[13], 1459 &addr[14], &addr[15], 1460 &pal, &port[0], &port[1]); 1461 if (error != 21) { 1462 fputs( 1463"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1464 error = 1; 1465 goto bad; 1466 } 1467 if (af != 6 || hal != 16 || pal != 2) { 1468 fputs( 1469"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1470 error = 1; 1471 goto bad; 1472 } 1473 1474 error = 0; 1475 memset(&data_addr, 0, sizeof(data_addr)); 1476 data_addr.su_family = AF_INET6; 1477 data_addr.su_len = sizeof(struct sockaddr_in6); 1478 { 1479 int i; 1480 for (i = 0; i < sizeof(struct in6_addr); i++) { 1481 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1482 UC(addr[i]); 1483 } 1484 } 1485 data_addr.su_port = htons(pack2(port, 0)); 1486 break; 1487#endif 1488 default: 1489 error = 1; 1490 } 1491 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1492 char delim[4]; 1493 1494 port[0] = 0; 1495 if (code / 10 == 22 && code != 229) { 1496 fputs("wrong server: return code must be 229\n", 1497 ttyout); 1498 error = 1; 1499 goto bad; 1500 } 1501 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1502 &delim[1], &delim[2], &port[1], 1503 &delim[3]) != 5) { 1504 fputs("parse error!\n", ttyout); 1505 error = 1; 1506 goto bad; 1507 } 1508 if (delim[0] != delim[1] || delim[0] != delim[2] 1509 || delim[0] != delim[3]) { 1510 fputs("parse error!\n", ttyout); 1511 error = 1; 1512 goto bad; 1513 } 1514 data_addr = hisctladdr; 1515 data_addr.su_port = htons(port[1]); 1516 } else 1517 goto bad; 1518 1519 while (xconnect(data, (struct sockaddr *)&data_addr.si_su, 1520 data_addr.su_len) < 0) { 1521 if (activefallback) { 1522 (void)close(data); 1523 data = -1; 1524 passivemode = 0; 1525#if 0 1526 activefallback = 0; 1527#endif 1528 goto reinit; 1529 } 1530 warn("connect for data channel"); 1531 goto bad; 1532 } 1533#ifdef IPTOS_THROUGHPUT 1534 if (data_addr.su_family == AF_INET) { 1535 on = IPTOS_THROUGHPUT; 1536 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1537 (void *)&on, sizeof(on)) == -1) { 1538 if (debug) 1539 warn("setsockopt %s (ignored)", 1540 "IPTOS_THROUGHPUT"); 1541 } 1542 } 1543#endif 1544 return (0); 1545 } 1546 1547 noport: 1548 data_addr = myctladdr; 1549 if (sendport) 1550 data_addr.su_port = 0; /* let system pick one */ 1551 if (data != -1) 1552 (void)close(data); 1553 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1554 if (data < 0) { 1555 warn("socket"); 1556 if (tmpno) 1557 sendport = 1; 1558 return (1); 1559 } 1560 if (!sendport) 1561 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1562 (void *)&on, sizeof(on)) == -1) { 1563 warn("setsockopt %s", "SO_REUSEADDR"); 1564 goto bad; 1565 } 1566 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1567 data_addr.su_len) < 0) { 1568 warn("bind"); 1569 goto bad; 1570 } 1571 if ((options & SO_DEBUG) && 1572 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1573 (void *)&on, sizeof(on)) == -1) { 1574 if (debug) 1575 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1576 } 1577 len = sizeof(data_addr.si_su); 1578 memset((char *)&data_addr, 0, sizeof (data_addr)); 1579 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1580 warn("getsockname"); 1581 goto bad; 1582 } 1583 data_addr.su_len = len; 1584 if (xlisten(data, 1) < 0) 1585 warn("listen"); 1586 1587 if (sendport) { 1588 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1589 int af; 1590 struct sockinet tmp; 1591 1592 switch (data_addr.su_family) { 1593 case AF_INET: 1594 if (!epsv4 || epsv4bad) { 1595 result = COMPLETE + 1; 1596 break; 1597 } 1598 /* FALLTHROUGH */ 1599#ifdef INET6 1600 case AF_INET6: 1601#endif 1602 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1603 tmp = data_addr; 1604#ifdef INET6 1605 if (tmp.su_family == AF_INET6) 1606 tmp.si_su.su_sin6.sin6_scope_id = 0; 1607#endif 1608 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1609 tmp.su_len, hname, sizeof(hname), sname, 1610 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1611 result = ERROR; 1612 } else { 1613 result = command("EPRT |%d|%s|%s|", af, hname, 1614 sname); 1615 if (!connected) 1616 return (1); 1617 if (result != COMPLETE) { 1618 epsv4bad = 1; 1619 if (debug) 1620 fputs( 1621 "disabling epsv4 for this connection\n", 1622 ttyout); 1623 } 1624 } 1625 break; 1626 default: 1627 result = COMPLETE + 1; 1628 break; 1629 } 1630 if (result == COMPLETE) 1631 goto skip_port; 1632 1633 switch (data_addr.su_family) { 1634 case AF_INET: 1635 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1636 p = (char *)&data_addr.su_port; 1637 result = command("PORT %d,%d,%d,%d,%d,%d", 1638 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1639 UC(p[0]), UC(p[1])); 1640 break; 1641#ifdef INET6 1642 case AF_INET6: 1643 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1644 p = (char *)&data_addr.su_port; 1645 result = command( 1646 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1647 6, 16, 1648 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1649 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1650 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1651 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1652 2, UC(p[0]), UC(p[1])); 1653 break; 1654#endif 1655 default: 1656 result = COMPLETE + 1; /* xxx */ 1657 } 1658 if (!connected) 1659 return (1); 1660 skip_port: 1661 1662 if (result == ERROR && sendport == -1) { 1663 sendport = 0; 1664 tmpno = 1; 1665 goto noport; 1666 } 1667 return (result != COMPLETE); 1668 } 1669 if (tmpno) 1670 sendport = 1; 1671#ifdef IPTOS_THROUGHPUT 1672 if (data_addr.su_family == AF_INET) { 1673 on = IPTOS_THROUGHPUT; 1674 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1675 (void *)&on, sizeof(on)) == -1) 1676 if (debug) 1677 warn("setsockopt %s (ignored)", 1678 "IPTOS_THROUGHPUT"); 1679 } 1680#endif 1681 return (0); 1682 bad: 1683 (void)close(data); 1684 data = -1; 1685 if (tmpno) 1686 sendport = 1; 1687 return (1); 1688} 1689 1690FILE * 1691dataconn(const char *lmode) 1692{ 1693 struct sockinet from; 1694 int s, flags, rv, timeout; 1695 struct timeval endtime, now, td; 1696 struct pollfd pfd[1]; 1697 socklen_t fromlen; 1698 1699 if (passivemode) /* passive data connection */ 1700 return (fdopen(data, lmode)); 1701 1702 /* active mode data connection */ 1703 1704 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1705 goto dataconn_failed; /* get current socket flags */ 1706 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1707 goto dataconn_failed; /* set non-blocking connect */ 1708 1709 /* NOTE: we now must restore socket flags on successful exit */ 1710 1711 /* limit time waiting on listening socket */ 1712 pfd[0].fd = data; 1713 pfd[0].events = POLLIN; 1714 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1715 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1716 /* without -q, default to 60s */ 1717 do { 1718 (void)gettimeofday(&now, NULL); 1719 timersub(&endtime, &now, &td); 1720 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1721 if (timeout < 0) 1722 timeout = 0; 1723 rv = xpoll(pfd, 1, timeout); 1724 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1725 if (rv == -1) { 1726 warn("poll waiting before accept"); 1727 goto dataconn_failed; 1728 } 1729 if (rv == 0) { 1730 warn("poll timeout waiting before accept"); 1731 goto dataconn_failed; 1732 } 1733 1734 /* (non-blocking) accept the connection */ 1735 fromlen = myctladdr.su_len; 1736 do { 1737 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1738 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1739 if (s == -1) { 1740 warn("accept"); 1741 goto dataconn_failed; 1742 } 1743 1744 (void)close(data); 1745 data = s; 1746 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1747 goto dataconn_failed; 1748 1749#ifdef IPTOS_THROUGHPUT 1750 if (from.su_family == AF_INET) { 1751 int tos = IPTOS_THROUGHPUT; 1752 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1753 (void *)&tos, sizeof(tos)) == -1) { 1754 if (debug) 1755 warn("setsockopt %s (ignored)", 1756 "IPTOS_THROUGHPUT"); 1757 } 1758 } 1759#endif 1760 return (fdopen(data, lmode)); 1761 1762 dataconn_failed: 1763 (void)close(data); 1764 data = -1; 1765 return (NULL); 1766} 1767 1768void 1769psabort(int notused) 1770{ 1771 int oerrno = errno; 1772 1773 sigint_raised = 1; 1774 alarmtimer(0); 1775 abrtflag++; 1776 errno = oerrno; 1777} 1778 1779void 1780pswitch(int flag) 1781{ 1782 sigfunc oldintr; 1783 static struct comvars { 1784 int connect; 1785 char name[MAXHOSTNAMELEN]; 1786 struct sockinet mctl; 1787 struct sockinet hctl; 1788 FILE *in; 1789 FILE *out; 1790 int tpe; 1791 int curtpe; 1792 int cpnd; 1793 int sunqe; 1794 int runqe; 1795 int mcse; 1796 int ntflg; 1797 char nti[17]; 1798 char nto[17]; 1799 int mapflg; 1800 char mi[MAXPATHLEN]; 1801 char mo[MAXPATHLEN]; 1802 } proxstruct, tmpstruct; 1803 struct comvars *ip, *op; 1804 1805 abrtflag = 0; 1806 oldintr = xsignal(SIGINT, psabort); 1807 if (flag) { 1808 if (proxy) 1809 return; 1810 ip = &tmpstruct; 1811 op = &proxstruct; 1812 proxy++; 1813 } else { 1814 if (!proxy) 1815 return; 1816 ip = &proxstruct; 1817 op = &tmpstruct; 1818 proxy = 0; 1819 } 1820 ip->connect = connected; 1821 connected = op->connect; 1822 if (hostname) 1823 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1824 else 1825 ip->name[0] = '\0'; 1826 hostname = op->name; 1827 ip->hctl = hisctladdr; 1828 hisctladdr = op->hctl; 1829 ip->mctl = myctladdr; 1830 myctladdr = op->mctl; 1831 ip->in = cin; 1832 cin = op->in; 1833 ip->out = cout; 1834 cout = op->out; 1835 ip->tpe = type; 1836 type = op->tpe; 1837 ip->curtpe = curtype; 1838 curtype = op->curtpe; 1839 ip->cpnd = cpend; 1840 cpend = op->cpnd; 1841 ip->sunqe = sunique; 1842 sunique = op->sunqe; 1843 ip->runqe = runique; 1844 runique = op->runqe; 1845 ip->mcse = mcase; 1846 mcase = op->mcse; 1847 ip->ntflg = ntflag; 1848 ntflag = op->ntflg; 1849 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1850 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1851 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1852 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1853 ip->mapflg = mapflag; 1854 mapflag = op->mapflg; 1855 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1856 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1857 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1858 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1859 (void)xsignal(SIGINT, oldintr); 1860 if (abrtflag) { 1861 abrtflag = 0; 1862 (*oldintr)(SIGINT); 1863 } 1864} 1865 1866void 1867abortpt(int notused) 1868{ 1869 1870 sigint_raised = 1; 1871 alarmtimer(0); 1872 if (fromatty) 1873 write(fileno(ttyout), "\n", 1); 1874 ptabflg++; 1875 mflag = 0; 1876 abrtflag = 0; 1877 siglongjmp(ptabort, 1); 1878} 1879 1880void 1881proxtrans(const char *cmd, const char *local, const char *remote) 1882{ 1883 sigfunc oldintr; 1884 int prox_type, nfnd; 1885 volatile int secndflag; 1886 char *cmd2; 1887 1888#ifdef __GNUC__ /* to shut up gcc warnings */ 1889 (void)&oldintr; 1890 (void)&cmd2; 1891#endif 1892 1893 oldintr = NULL; 1894 secndflag = 0; 1895 if (strcmp(cmd, "RETR")) 1896 cmd2 = "RETR"; 1897 else 1898 cmd2 = runique ? "STOU" : "STOR"; 1899 if ((prox_type = type) == 0) { 1900 if (unix_server && unix_proxy) 1901 prox_type = TYPE_I; 1902 else 1903 prox_type = TYPE_A; 1904 } 1905 if (curtype != prox_type) 1906 changetype(prox_type, 1); 1907 if (command("PASV") != COMPLETE) { 1908 fputs("proxy server does not support third party transfers.\n", 1909 ttyout); 1910 return; 1911 } 1912 pswitch(0); 1913 if (!connected) { 1914 fputs("No primary connection.\n", ttyout); 1915 pswitch(1); 1916 code = -1; 1917 return; 1918 } 1919 if (curtype != prox_type) 1920 changetype(prox_type, 1); 1921 if (command("PORT %s", pasv) != COMPLETE) { 1922 pswitch(1); 1923 return; 1924 } 1925 if (sigsetjmp(ptabort, 1)) 1926 goto abort; 1927 oldintr = xsignal(SIGINT, abortpt); 1928 if ((restart_point && 1929 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1930 || (command("%s %s", cmd, remote) != PRELIM)) { 1931 (void)xsignal(SIGINT, oldintr); 1932 pswitch(1); 1933 return; 1934 } 1935 sleep(2); 1936 pswitch(1); 1937 secndflag++; 1938 if ((restart_point && 1939 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1940 || (command("%s %s", cmd2, local) != PRELIM)) 1941 goto abort; 1942 ptflag++; 1943 (void)getreply(0); 1944 pswitch(0); 1945 (void)getreply(0); 1946 (void)xsignal(SIGINT, oldintr); 1947 pswitch(1); 1948 ptflag = 0; 1949 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1950 return; 1951 abort: 1952 if (sigsetjmp(xferabort, 1)) { 1953 (void)xsignal(SIGINT, oldintr); 1954 return; 1955 } 1956 (void)xsignal(SIGINT, abort_squared); 1957 ptflag = 0; 1958 if (strcmp(cmd, "RETR") && !proxy) 1959 pswitch(1); 1960 else if (!strcmp(cmd, "RETR") && proxy) 1961 pswitch(0); 1962 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1963 if (command("%s %s", cmd2, local) != PRELIM) { 1964 pswitch(0); 1965 if (cpend) 1966 abort_remote(NULL); 1967 } 1968 pswitch(1); 1969 if (ptabflg) 1970 code = -1; 1971 (void)xsignal(SIGINT, oldintr); 1972 return; 1973 } 1974 if (cpend) 1975 abort_remote(NULL); 1976 pswitch(!proxy); 1977 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1978 if (command("%s %s", cmd2, local) != PRELIM) { 1979 pswitch(0); 1980 if (cpend) 1981 abort_remote(NULL); 1982 pswitch(1); 1983 if (ptabflg) 1984 code = -1; 1985 (void)xsignal(SIGINT, oldintr); 1986 return; 1987 } 1988 } 1989 if (cpend) 1990 abort_remote(NULL); 1991 pswitch(!proxy); 1992 if (cpend) { 1993 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1994 if (nfnd < 0) 1995 warn("abort"); 1996 if (ptabflg) 1997 code = -1; 1998 lostpeer(0); 1999 } 2000 (void)getreply(0); 2001 (void)getreply(0); 2002 } 2003 if (proxy) 2004 pswitch(0); 2005 pswitch(1); 2006 if (ptabflg) 2007 code = -1; 2008 (void)xsignal(SIGINT, oldintr); 2009} 2010 2011void 2012reset(int argc, char *argv[]) 2013{ 2014 int nfnd = 1; 2015 2016 if (argc == 0 && argv != NULL) { 2017 fprintf(ttyout, "usage: %s\n", argv[0]); 2018 code = -1; 2019 return; 2020 } 2021 while (nfnd > 0) { 2022 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2023 warn("reset"); 2024 code = -1; 2025 lostpeer(0); 2026 } else if (nfnd) 2027 (void)getreply(0); 2028 } 2029} 2030 2031char * 2032gunique(const char *local) 2033{ 2034 static char new[MAXPATHLEN]; 2035 char *cp = strrchr(local, '/'); 2036 int d, count=0, len; 2037 char ext = '1'; 2038 2039 if (cp) 2040 *cp = '\0'; 2041 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2042 if (cp) 2043 *cp = '/'; 2044 if (d < 0) { 2045 warn("local: %s", local); 2046 return (NULL); 2047 } 2048 len = strlcpy(new, local, sizeof(new)); 2049 cp = &new[len]; 2050 *cp++ = '.'; 2051 while (!d) { 2052 if (++count == 100) { 2053 fputs("runique: can't find unique file name.\n", 2054 ttyout); 2055 return (NULL); 2056 } 2057 *cp++ = ext; 2058 *cp = '\0'; 2059 if (ext == '9') 2060 ext = '0'; 2061 else 2062 ext++; 2063 if ((d = access(new, F_OK)) < 0) 2064 break; 2065 if (ext != '0') 2066 cp--; 2067 else if (*(cp - 2) == '.') 2068 *(cp - 1) = '1'; 2069 else { 2070 *(cp - 2) = *(cp - 2) + 1; 2071 cp--; 2072 } 2073 } 2074 return (new); 2075} 2076 2077/* 2078 * abort_squared -- 2079 * aborts abort_remote(). lostpeer() is called because if the user is 2080 * too impatient to wait or there's another problem then ftp really 2081 * needs to get back to a known state. 2082 */ 2083void 2084abort_squared(int dummy) 2085{ 2086 char msgbuf[100]; 2087 size_t len; 2088 2089 sigint_raised = 1; 2090 alarmtimer(0); 2091 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2092 sizeof(msgbuf)); 2093 write(fileno(ttyout), msgbuf, len); 2094 lostpeer(0); 2095 siglongjmp(xferabort, 1); 2096} 2097 2098void 2099abort_remote(FILE *din) 2100{ 2101 char buf[BUFSIZ]; 2102 int nfnd; 2103 2104 if (cout == NULL) { 2105 warnx("Lost control connection for abort."); 2106 if (ptabflg) 2107 code = -1; 2108 lostpeer(0); 2109 return; 2110 } 2111 /* 2112 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2113 * after urgent byte rather than before as is protocol now 2114 */ 2115 buf[0] = IAC; 2116 buf[1] = IP; 2117 buf[2] = IAC; 2118 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2119 warn("abort"); 2120 fprintf(cout, "%cABOR\r\n", DM); 2121 (void)fflush(cout); 2122 if ((nfnd = empty(cin, din, 10)) <= 0) { 2123 if (nfnd < 0) 2124 warn("abort"); 2125 if (ptabflg) 2126 code = -1; 2127 lostpeer(0); 2128 } 2129 if (din && (nfnd & 2)) { 2130 while (read(fileno(din), buf, BUFSIZ) > 0) 2131 continue; 2132 } 2133 if (getreply(0) == ERROR && code == 552) { 2134 /* 552 needed for nic style abort */ 2135 (void)getreply(0); 2136 } 2137 (void)getreply(0); 2138} 2139 2140void 2141ai_unmapped(struct addrinfo *ai) 2142{ 2143#ifdef INET6 2144 struct sockaddr_in6 *sin6; 2145 struct sockaddr_in sin; 2146 socklen_t len; 2147 2148 if (ai->ai_family != AF_INET6) 2149 return; 2150 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2151 sizeof(sin) > ai->ai_addrlen) 2152 return; 2153 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2154 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2155 return; 2156 2157 memset(&sin, 0, sizeof(sin)); 2158 sin.sin_family = AF_INET; 2159 len = sizeof(struct sockaddr_in); 2160 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2161 sizeof(sin.sin_addr)); 2162 sin.sin_port = sin6->sin6_port; 2163 2164 ai->ai_family = AF_INET; 2165#if HAVE_SOCKADDR_SA_LEN 2166 sin.sin_len = len; 2167#endif 2168 memcpy(ai->ai_addr, &sin, len); 2169 ai->ai_addrlen = len; 2170#endif 2171} 2172