1 /* $NetBSD: ftp.c,v 1.129 2005/04/11 05:47:56 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 0 100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101 #else 102 __RCSID("$NetBSD: ftp.c,v 1.129 2005/04/11 05:47:56 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 !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 161 162 struct sockinet myctladdr, hisctladdr, data_addr; 163 164 char * 165 hookup(char *host, char *port) 166 { 167 int s = -1, len, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 char *cause = "unknown"; 172 173 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 174 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 175 memset(&hints, 0, sizeof(hints)); 176 portnum = parseport(port, FTP_PORT); 177 hints.ai_flags = AI_CANONNAME; 178 hints.ai_family = family; 179 hints.ai_socktype = SOCK_STREAM; 180 hints.ai_protocol = 0; 181 error = getaddrinfo(host, NULL, &hints, &res0); 182 if (error) { 183 warnx("%s", gai_strerror(error)); 184 code = -1; 185 return (0); 186 } 187 188 if (res0->ai_canonname) 189 (void)strlcpy(hostnamebuf, res0->ai_canonname, 190 sizeof(hostnamebuf)); 191 else 192 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 193 hostname = hostnamebuf; 194 195 for (res = res0; res; res = res->ai_next) { 196 /* 197 * make sure that ai_addr is NOT an IPv4 mapped address. 198 * IPv4 mapped address complicates too many things in FTP 199 * protocol handling, as FTP protocol is defined differently 200 * between IPv4 and IPv6. 201 * 202 * This may not be the best way to handle this situation, 203 * since the semantics of IPv4 mapped address is defined in 204 * the kernel. There are configurations where we should use 205 * IPv4 mapped address as native IPv6 address, not as 206 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 207 * 208 * More complete solution would be to have an additional 209 * getsockopt to grab "real" peername/sockname. "real" 210 * peername/sockname will be AF_INET if IPv4 mapped address 211 * is used to embed IPv4 address, and will be AF_INET6 if 212 * we use it as native. What a mess! 213 */ 214 ai_unmapped(res); 215 #if 0 /*old behavior*/ 216 if (res != res0) /* not on the first address */ 217 #else 218 if (res0->ai_next) /* if we have multiple possibilities */ 219 #endif 220 { 221 if (getnameinfo(res->ai_addr, res->ai_addrlen, 222 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 223 strlcpy(hbuf, "?", sizeof(hbuf)); 224 fprintf(ttyout, "Trying %s...\n", hbuf); 225 } 226 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 227 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 228 if (s < 0) { 229 cause = "socket"; 230 continue; 231 } 232 error = xconnect(s, res->ai_addr, res->ai_addrlen); 233 if (error) { 234 /* this "if" clause is to prevent print warning twice */ 235 if (res->ai_next) { 236 if (getnameinfo(res->ai_addr, res->ai_addrlen, 237 hbuf, sizeof(hbuf), NULL, 0, 238 NI_NUMERICHOST)) 239 strlcpy(hbuf, "?", sizeof(hbuf)); 240 warn("connect to address %s", hbuf); 241 } 242 cause = "connect"; 243 close(s); 244 s = -1; 245 continue; 246 } 247 248 /* finally we got one */ 249 break; 250 } 251 if (s < 0) { 252 warn("%s", cause); 253 code = -1; 254 freeaddrinfo(res0); 255 return 0; 256 } 257 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 258 hisctladdr.su_len = res->ai_addrlen; 259 freeaddrinfo(res0); 260 res0 = res = NULL; 261 262 len = hisctladdr.su_len; 263 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) < 0) { 264 warn("getsockname"); 265 code = -1; 266 goto bad; 267 } 268 myctladdr.su_len = len; 269 270 #ifdef IPTOS_LOWDELAY 271 if (hisctladdr.su_family == AF_INET) { 272 int tos = IPTOS_LOWDELAY; 273 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 274 sizeof(int)) < 0) 275 if (debug) 276 warn("setsockopt TOS (ignored)"); 277 } 278 #endif 279 cin = fdopen(s, "r"); 280 cout = fdopen(s, "w"); 281 if (cin == NULL || cout == NULL) { 282 warnx("fdopen failed."); 283 if (cin) 284 (void)fclose(cin); 285 if (cout) 286 (void)fclose(cout); 287 code = -1; 288 goto bad; 289 } 290 if (verbose) 291 fprintf(ttyout, "Connected to %s.\n", hostname); 292 if (getreply(0) > 2) { /* read startup message from server */ 293 if (cin) 294 (void)fclose(cin); 295 if (cout) 296 (void)fclose(cout); 297 code = -1; 298 goto bad; 299 } 300 { 301 int on = 1; 302 303 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) 304 < 0 && debug) { 305 warn("setsockopt"); 306 } 307 } 308 309 return (hostname); 310 bad: 311 (void)close(s); 312 return (NULL); 313 } 314 315 void 316 cmdabort(int notused) 317 { 318 int oerrno = errno; 319 320 sigint_raised = 1; 321 alarmtimer(0); 322 if (fromatty) 323 write(fileno(ttyout), "\n", 1); 324 abrtflag++; 325 if (ptflag) 326 siglongjmp(ptabort, 1); 327 errno = oerrno; 328 } 329 330 void 331 cmdtimeout(int notused) 332 { 333 int oerrno = errno; 334 335 alarmtimer(0); 336 if (fromatty) 337 write(fileno(ttyout), "\n", 1); 338 timeoutflag++; 339 if (ptflag) 340 siglongjmp(ptabort, 1); 341 errno = oerrno; 342 } 343 344 /*VARARGS*/ 345 int 346 command(const char *fmt, ...) 347 { 348 va_list ap; 349 int r; 350 sigfunc oldsigint; 351 352 if (debug) { 353 fputs("---> ", ttyout); 354 va_start(ap, fmt); 355 if (strncmp("PASS ", fmt, 5) == 0) 356 fputs("PASS XXXX", ttyout); 357 else if (strncmp("ACCT ", fmt, 5) == 0) 358 fputs("ACCT XXXX", ttyout); 359 else 360 vfprintf(ttyout, fmt, ap); 361 va_end(ap); 362 putc('\n', ttyout); 363 } 364 if (cout == NULL) { 365 warnx("No control connection for command."); 366 code = -1; 367 return (0); 368 } 369 370 abrtflag = 0; 371 372 oldsigint = xsignal(SIGINT, cmdabort); 373 374 va_start(ap, fmt); 375 vfprintf(cout, fmt, ap); 376 va_end(ap); 377 fputs("\r\n", cout); 378 (void)fflush(cout); 379 cpend = 1; 380 r = getreply(!strcmp(fmt, "QUIT")); 381 if (abrtflag && oldsigint != SIG_IGN) 382 (*oldsigint)(SIGINT); 383 (void)xsignal(SIGINT, oldsigint); 384 return (r); 385 } 386 387 int 388 getreply(int expecteof) 389 { 390 char current_line[BUFSIZ]; /* last line of previous reply */ 391 int c, n, line; 392 int dig; 393 int originalcode = 0, continuation = 0; 394 sigfunc oldsigint, oldsigalrm; 395 int pflag = 0; 396 char *cp, *pt = pasv; 397 398 abrtflag = 0; 399 timeoutflag = 0; 400 401 oldsigint = xsignal(SIGINT, cmdabort); 402 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 403 404 for (line = 0 ;; line++) { 405 dig = n = code = 0; 406 cp = current_line; 407 while (alarmtimer(60),((c = getc(cin)) != '\n')) { 408 if (c == IAC) { /* handle telnet commands */ 409 switch (c = getc(cin)) { 410 case WILL: 411 case WONT: 412 c = getc(cin); 413 fprintf(cout, "%c%c%c", IAC, DONT, c); 414 (void)fflush(cout); 415 break; 416 case DO: 417 case DONT: 418 c = getc(cin); 419 fprintf(cout, "%c%c%c", IAC, WONT, c); 420 (void)fflush(cout); 421 break; 422 default: 423 break; 424 } 425 continue; 426 } 427 dig++; 428 if (c == EOF) { 429 /* 430 * these will get trashed by pswitch() 431 * in lostpeer() 432 */ 433 int reply_timeoutflag = timeoutflag; 434 int reply_abrtflag = abrtflag; 435 436 alarmtimer(0); 437 if (expecteof && feof(cin)) { 438 (void)xsignal(SIGINT, oldsigint); 439 (void)xsignal(SIGALRM, oldsigalrm); 440 code = 221; 441 return (0); 442 } 443 cpend = 0; 444 lostpeer(0); 445 if (verbose) { 446 if (reply_timeoutflag) 447 fputs( 448 "421 Service not available, remote server timed out. Connection closed\n", 449 ttyout); 450 else if (reply_abrtflag) 451 fputs( 452 "421 Service not available, user interrupt. Connection closed.\n", 453 ttyout); 454 else 455 fputs( 456 "421 Service not available, remote server has closed connection.\n", 457 ttyout); 458 (void)fflush(ttyout); 459 } 460 code = 421; 461 (void)xsignal(SIGINT, oldsigint); 462 (void)xsignal(SIGALRM, oldsigalrm); 463 return (4); 464 } 465 if (c != '\r' && (verbose > 0 || 466 ((verbose > -1 && n == '5' && dig > 4) && 467 (((!n && c < '5') || (n && n < '5')) 468 || !retry_connect)))) { 469 if (proxflag && 470 (dig == 1 || (dig == 5 && verbose == 0))) 471 fprintf(ttyout, "%s:", hostname); 472 (void)putc(c, ttyout); 473 } 474 if (dig < 4 && isdigit(c)) 475 code = code * 10 + (c - '0'); 476 if (!pflag && (code == 227 || code == 228)) 477 pflag = 1; 478 else if (!pflag && code == 229) 479 pflag = 100; 480 if (dig > 4 && pflag == 1 && isdigit(c)) 481 pflag = 2; 482 if (pflag == 2) { 483 if (c != '\r' && c != ')') { 484 if (pt < &pasv[sizeof(pasv) - 1]) 485 *pt++ = c; 486 } else { 487 *pt = '\0'; 488 pflag = 3; 489 } 490 } 491 if (pflag == 100 && c == '(') 492 pflag = 2; 493 if (dig == 4 && c == '-') { 494 if (continuation) 495 code = 0; 496 continuation++; 497 } 498 if (n == 0) 499 n = c; 500 if (cp < ¤t_line[sizeof(current_line) - 1]) 501 *cp++ = c; 502 } 503 if (verbose > 0 || ((verbose > -1 && n == '5') && 504 (n < '5' || !retry_connect))) { 505 (void)putc(c, ttyout); 506 (void)fflush (ttyout); 507 } 508 if (cp[-1] == '\r') 509 cp[-1] = '\0'; 510 *cp = '\0'; 511 if (line == 0) 512 (void)strlcpy(reply_string, current_line, 513 sizeof(reply_string)); 514 if (line > 0 && code == 0 && reply_callback != NULL) 515 (*reply_callback)(current_line); 516 if (continuation && code != originalcode) { 517 if (originalcode == 0) 518 originalcode = code; 519 continue; 520 } 521 if (n != '1') 522 cpend = 0; 523 alarmtimer(0); 524 (void)xsignal(SIGINT, oldsigint); 525 (void)xsignal(SIGALRM, oldsigalrm); 526 if (code == 421 || originalcode == 421) 527 lostpeer(0); 528 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 529 (*oldsigint)(SIGINT); 530 if (timeoutflag && oldsigalrm != cmdtimeout && 531 oldsigalrm != SIG_IGN) 532 (*oldsigalrm)(SIGINT); 533 return (n - '0'); 534 } 535 } 536 537 static int 538 empty(FILE *cin, FILE *din, int sec) 539 { 540 int nr, nfd; 541 struct pollfd pfd[2]; 542 543 nfd = 0; 544 if (cin) { 545 pfd[nfd].fd = fileno(cin); 546 pfd[nfd++].events = POLLIN; 547 } 548 549 if (din) { 550 pfd[nfd].fd = fileno(din); 551 pfd[nfd++].events = POLLIN; 552 } 553 554 if ((nr = xpoll(pfd, nfd, sec * 1000)) <= 0) 555 return nr; 556 557 nr = 0; 558 nfd = 0; 559 if (cin) 560 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 561 if (din) 562 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 563 return nr; 564 } 565 566 sigjmp_buf xferabort; 567 568 void 569 abortxfer(int notused) 570 { 571 char msgbuf[100]; 572 int len; 573 574 sigint_raised = 1; 575 alarmtimer(0); 576 mflag = 0; 577 abrtflag = 0; 578 switch (direction[0]) { 579 case 'r': 580 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 581 break; 582 case 's': 583 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 584 break; 585 default: 586 errx(1, "abortxfer called with unknown direction `%s'", 587 direction); 588 } 589 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 590 sizeof(msgbuf)); 591 write(fileno(ttyout), msgbuf, len); 592 siglongjmp(xferabort, 1); 593 } 594 595 void 596 sendrequest(const char *cmd, const char *local, const char *remote, 597 int printnames) 598 { 599 struct stat st; 600 int c, d; 601 FILE *fin, *dout; 602 int (*closefunc)(FILE *); 603 sigfunc oldintr, oldintp; 604 volatile off_t hashbytes; 605 char *lmode, *bufp; 606 static size_t bufsize; 607 static char *buf; 608 int oprogress; 609 610 #ifdef __GNUC__ /* to shut up gcc warnings */ 611 (void)&fin; 612 (void)&dout; 613 (void)&closefunc; 614 (void)&oldintr; 615 (void)&oldintp; 616 (void)&lmode; 617 #endif 618 619 hashbytes = mark; 620 direction = "sent"; 621 dout = NULL; 622 bytes = 0; 623 filesize = -1; 624 oprogress = progress; 625 if (verbose && printnames) { 626 if (local && *local != '-') 627 fprintf(ttyout, "local: %s ", local); 628 if (remote) 629 fprintf(ttyout, "remote: %s\n", remote); 630 } 631 if (proxy) { 632 proxtrans(cmd, local, remote); 633 return; 634 } 635 if (curtype != type) 636 changetype(type, 0); 637 closefunc = NULL; 638 oldintr = NULL; 639 oldintp = NULL; 640 lmode = "w"; 641 if (sigsetjmp(xferabort, 1)) { 642 while (cpend) 643 (void)getreply(0); 644 code = -1; 645 goto cleanupsend; 646 } 647 (void)xsignal(SIGQUIT, psummary); 648 oldintr = xsignal(SIGINT, abortxfer); 649 if (strcmp(local, "-") == 0) { 650 fin = stdin; 651 progress = 0; 652 } else if (*local == '|') { 653 oldintp = xsignal(SIGPIPE, SIG_IGN); 654 fin = popen(local + 1, "r"); 655 if (fin == NULL) { 656 warn("%s", local + 1); 657 code = -1; 658 goto cleanupsend; 659 } 660 progress = 0; 661 closefunc = pclose; 662 } else { 663 fin = fopen(local, "r"); 664 if (fin == NULL) { 665 warn("local: %s", local); 666 code = -1; 667 goto cleanupsend; 668 } 669 closefunc = fclose; 670 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 671 fprintf(ttyout, "%s: not a plain file.\n", local); 672 code = -1; 673 goto cleanupsend; 674 } 675 filesize = st.st_size; 676 } 677 if (initconn()) { 678 code = -1; 679 goto cleanupsend; 680 } 681 if (sigsetjmp(xferabort, 1)) 682 goto abort; 683 684 if (restart_point && 685 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 686 int rc; 687 688 rc = -1; 689 switch (curtype) { 690 case TYPE_A: 691 rc = fseeko(fin, restart_point, SEEK_SET); 692 break; 693 case TYPE_I: 694 case TYPE_L: 695 rc = lseek(fileno(fin), restart_point, SEEK_SET); 696 break; 697 } 698 if (rc < 0) { 699 warn("local: %s", local); 700 goto cleanupsend; 701 } 702 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 703 goto cleanupsend; 704 lmode = "r+"; 705 } 706 if (remote) { 707 if (command("%s %s", cmd, remote) != PRELIM) 708 goto cleanupsend; 709 } else { 710 if (command("%s", cmd) != PRELIM) 711 goto cleanupsend; 712 } 713 dirchange = 1; 714 dout = dataconn(lmode); 715 if (dout == NULL) 716 goto abort; 717 718 if (sndbuf_size > bufsize) { 719 if (buf) 720 (void)free(buf); 721 bufsize = sndbuf_size; 722 buf = xmalloc(bufsize); 723 } 724 725 progressmeter(-1); 726 oldintp = xsignal(SIGPIPE, SIG_IGN); 727 728 switch (curtype) { 729 730 case TYPE_I: 731 case TYPE_L: 732 if (rate_put) { /* rate limited */ 733 while (1) { 734 struct timeval then, now, td; 735 off_t bufrem; 736 737 (void)gettimeofday(&then, NULL); 738 errno = c = d = 0; 739 bufrem = rate_put; 740 while (bufrem > 0) { 741 if ((c = read(fileno(fin), buf, 742 MIN(bufsize, bufrem))) <= 0) 743 goto senddone; 744 bytes += c; 745 bufrem -= c; 746 for (bufp = buf; c > 0; 747 c -= d, bufp += d) 748 if ((d = write(fileno(dout), 749 bufp, c)) <= 0) 750 break; 751 if (d < 0) 752 goto senddone; 753 if (hash && 754 (!progress || filesize < 0) ) { 755 while (bytes >= hashbytes) { 756 (void)putc('#', ttyout); 757 hashbytes += mark; 758 } 759 (void)fflush(ttyout); 760 } 761 } 762 while (1) { 763 (void)gettimeofday(&now, NULL); 764 timersub(&now, &then, &td); 765 if (td.tv_sec > 0) 766 break; 767 usleep(1000000 - td.tv_usec); 768 } 769 } 770 } else { /* simpler/faster; no rate limit */ 771 while (1) { 772 errno = c = d = 0; 773 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 774 goto senddone; 775 bytes += c; 776 for (bufp = buf; c > 0; c -= d, bufp += d) 777 if ((d = write(fileno(dout), bufp, c)) 778 <= 0) 779 break; 780 if (d < 0) 781 goto senddone; 782 if (hash && (!progress || filesize < 0) ) { 783 while (bytes >= hashbytes) { 784 (void)putc('#', ttyout); 785 hashbytes += mark; 786 } 787 (void)fflush(ttyout); 788 } 789 } 790 } 791 senddone: 792 if (hash && (!progress || filesize < 0) && bytes > 0) { 793 if (bytes < mark) 794 (void)putc('#', ttyout); 795 (void)putc('\n', ttyout); 796 } 797 if (c < 0) 798 warn("local: %s", local); 799 if (d < 0) { 800 if (errno != EPIPE) 801 warn("netout"); 802 bytes = -1; 803 } 804 break; 805 806 case TYPE_A: 807 while ((c = getc(fin)) != EOF) { 808 if (c == '\n') { 809 while (hash && (!progress || filesize < 0) && 810 (bytes >= hashbytes)) { 811 (void)putc('#', ttyout); 812 (void)fflush(ttyout); 813 hashbytes += mark; 814 } 815 if (ferror(dout)) 816 break; 817 (void)putc('\r', dout); 818 bytes++; 819 } 820 (void)putc(c, dout); 821 bytes++; 822 #if 0 /* this violates RFC */ 823 if (c == '\r') { 824 (void)putc('\0', dout); 825 bytes++; 826 } 827 #endif 828 } 829 if (hash && (!progress || filesize < 0)) { 830 if (bytes < hashbytes) 831 (void)putc('#', ttyout); 832 (void)putc('\n', ttyout); 833 } 834 if (ferror(fin)) 835 warn("local: %s", local); 836 if (ferror(dout)) { 837 if (errno != EPIPE) 838 warn("netout"); 839 bytes = -1; 840 } 841 break; 842 } 843 844 progressmeter(1); 845 if (closefunc != NULL) { 846 (*closefunc)(fin); 847 fin = NULL; 848 } 849 (void)fclose(dout); 850 dout = NULL; 851 (void)getreply(0); 852 if (bytes > 0) 853 ptransfer(0); 854 goto cleanupsend; 855 856 abort: 857 (void)xsignal(SIGINT, oldintr); 858 oldintr = NULL; 859 if (!cpend) { 860 code = -1; 861 goto cleanupsend; 862 } 863 if (data >= 0) { 864 (void)close(data); 865 data = -1; 866 } 867 if (dout) { 868 (void)fclose(dout); 869 dout = NULL; 870 } 871 (void)getreply(0); 872 code = -1; 873 if (bytes > 0) 874 ptransfer(0); 875 876 cleanupsend: 877 if (oldintr) 878 (void)xsignal(SIGINT, oldintr); 879 if (oldintp) 880 (void)xsignal(SIGPIPE, oldintp); 881 if (data >= 0) { 882 (void)close(data); 883 data = -1; 884 } 885 if (closefunc != NULL && fin != NULL) 886 (*closefunc)(fin); 887 if (dout) 888 (void)fclose(dout); 889 progress = oprogress; 890 restart_point = 0; 891 bytes = 0; 892 } 893 894 void 895 recvrequest(const char *cmd, const char *local, const char *remote, 896 const char *lmode, int printnames, int ignorespecial) 897 { 898 FILE *fout, *din; 899 int (*closefunc)(FILE *); 900 sigfunc oldintr, oldintp; 901 int c, d; 902 volatile int is_retr, tcrflag, bare_lfs; 903 static size_t bufsize; 904 static char *buf; 905 volatile off_t hashbytes; 906 struct stat st; 907 time_t mtime; 908 struct timeval tval[2]; 909 int oprogress; 910 int opreserve; 911 912 #ifdef __GNUC__ /* to shut up gcc warnings */ 913 (void)&local; 914 (void)&fout; 915 (void)&din; 916 (void)&closefunc; 917 (void)&oldintr; 918 (void)&oldintp; 919 #endif 920 921 fout = NULL; 922 din = NULL; 923 hashbytes = mark; 924 direction = "received"; 925 bytes = 0; 926 bare_lfs = 0; 927 filesize = -1; 928 oprogress = progress; 929 opreserve = preserve; 930 is_retr = (strcmp(cmd, "RETR") == 0); 931 if (is_retr && verbose && printnames) { 932 if (local && (ignorespecial || *local != '-')) 933 fprintf(ttyout, "local: %s ", local); 934 if (remote) 935 fprintf(ttyout, "remote: %s\n", remote); 936 } 937 if (proxy && is_retr) { 938 proxtrans(cmd, local, remote); 939 return; 940 } 941 closefunc = NULL; 942 oldintr = NULL; 943 oldintp = NULL; 944 tcrflag = !crflag && is_retr; 945 if (sigsetjmp(xferabort, 1)) { 946 while (cpend) 947 (void)getreply(0); 948 code = -1; 949 goto cleanuprecv; 950 } 951 (void)xsignal(SIGQUIT, psummary); 952 oldintr = xsignal(SIGINT, abortxfer); 953 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 954 if (access(local, W_OK) < 0) { 955 char *dir = strrchr(local, '/'); 956 957 if (errno != ENOENT && errno != EACCES) { 958 warn("local: %s", local); 959 code = -1; 960 goto cleanuprecv; 961 } 962 if (dir != NULL) 963 *dir = 0; 964 d = access(dir == local ? "/" : 965 dir ? local : ".", W_OK); 966 if (dir != NULL) 967 *dir = '/'; 968 if (d < 0) { 969 warn("local: %s", local); 970 code = -1; 971 goto cleanuprecv; 972 } 973 if (!runique && errno == EACCES && 974 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 975 warn("local: %s", local); 976 code = -1; 977 goto cleanuprecv; 978 } 979 if (runique && errno == EACCES && 980 (local = gunique(local)) == NULL) { 981 code = -1; 982 goto cleanuprecv; 983 } 984 } 985 else if (runique && (local = gunique(local)) == NULL) { 986 code = -1; 987 goto cleanuprecv; 988 } 989 } 990 if (!is_retr) { 991 if (curtype != TYPE_A) 992 changetype(TYPE_A, 0); 993 } else { 994 if (curtype != type) 995 changetype(type, 0); 996 filesize = remotesize(remote, 0); 997 if (code == 421 || code == -1) 998 goto cleanuprecv; 999 } 1000 if (initconn()) { 1001 code = -1; 1002 goto cleanuprecv; 1003 } 1004 if (sigsetjmp(xferabort, 1)) 1005 goto abort; 1006 if (is_retr && restart_point && 1007 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1008 goto cleanuprecv; 1009 if (! EMPTYSTRING(remote)) { 1010 if (command("%s %s", cmd, remote) != PRELIM) 1011 goto cleanuprecv; 1012 } else { 1013 if (command("%s", cmd) != PRELIM) 1014 goto cleanuprecv; 1015 } 1016 din = dataconn("r"); 1017 if (din == NULL) 1018 goto abort; 1019 if (!ignorespecial && strcmp(local, "-") == 0) { 1020 fout = stdout; 1021 progress = 0; 1022 preserve = 0; 1023 } else if (!ignorespecial && *local == '|') { 1024 oldintp = xsignal(SIGPIPE, SIG_IGN); 1025 fout = popen(local + 1, "w"); 1026 if (fout == NULL) { 1027 warn("%s", local+1); 1028 goto abort; 1029 } 1030 progress = 0; 1031 preserve = 0; 1032 closefunc = pclose; 1033 } else { 1034 fout = fopen(local, lmode); 1035 if (fout == NULL) { 1036 warn("local: %s", local); 1037 goto abort; 1038 } 1039 closefunc = fclose; 1040 } 1041 1042 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1043 progress = 0; 1044 preserve = 0; 1045 } 1046 if (rcvbuf_size > bufsize) { 1047 if (buf) 1048 (void)free(buf); 1049 bufsize = rcvbuf_size; 1050 buf = xmalloc(bufsize); 1051 } 1052 1053 progressmeter(-1); 1054 1055 switch (curtype) { 1056 1057 case TYPE_I: 1058 case TYPE_L: 1059 if (is_retr && restart_point && 1060 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1061 warn("local: %s", local); 1062 goto cleanuprecv; 1063 } 1064 if (rate_get) { /* rate limiting */ 1065 while (1) { 1066 struct timeval then, now, td; 1067 off_t bufrem; 1068 1069 (void)gettimeofday(&then, NULL); 1070 errno = c = d = 0; 1071 for (bufrem = rate_get; bufrem > 0; ) { 1072 if ((c = read(fileno(din), buf, 1073 MIN(bufsize, bufrem))) <= 0) 1074 goto recvdone; 1075 bytes += c; 1076 bufrem -=c; 1077 if ((d = write(fileno(fout), buf, c)) 1078 != c) 1079 goto recvdone; 1080 if (hash && 1081 (!progress || filesize < 0)) { 1082 while (bytes >= hashbytes) { 1083 (void)putc('#', ttyout); 1084 hashbytes += mark; 1085 } 1086 (void)fflush(ttyout); 1087 } 1088 } 1089 /* sleep until time is up */ 1090 while (1) { 1091 (void)gettimeofday(&now, NULL); 1092 timersub(&now, &then, &td); 1093 if (td.tv_sec > 0) 1094 break; 1095 usleep(1000000 - td.tv_usec); 1096 } 1097 } 1098 } else { /* faster code (no limiting) */ 1099 while (1) { 1100 errno = c = d = 0; 1101 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1102 goto recvdone; 1103 bytes += c; 1104 if ((d = write(fileno(fout), buf, c)) != c) 1105 goto recvdone; 1106 if (hash && (!progress || filesize < 0)) { 1107 while (bytes >= hashbytes) { 1108 (void)putc('#', ttyout); 1109 hashbytes += mark; 1110 } 1111 (void)fflush(ttyout); 1112 } 1113 } 1114 } 1115 recvdone: 1116 if (hash && (!progress || filesize < 0) && bytes > 0) { 1117 if (bytes < mark) 1118 (void)putc('#', ttyout); 1119 (void)putc('\n', ttyout); 1120 } 1121 if (c < 0) { 1122 if (errno != EPIPE) 1123 warn("netin"); 1124 bytes = -1; 1125 } 1126 if (d < c) { 1127 if (d < 0) 1128 warn("local: %s", local); 1129 else 1130 warnx("%s: short write", local); 1131 } 1132 break; 1133 1134 case TYPE_A: 1135 if (is_retr && restart_point) { 1136 int ch; 1137 off_t i; 1138 1139 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1140 goto done; 1141 for (i = 0; i++ < restart_point;) { 1142 if ((ch = getc(fout)) == EOF) 1143 goto done; 1144 if (ch == '\n') 1145 i++; 1146 } 1147 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1148 done: 1149 warn("local: %s", local); 1150 goto cleanuprecv; 1151 } 1152 } 1153 while ((c = getc(din)) != EOF) { 1154 if (c == '\n') 1155 bare_lfs++; 1156 while (c == '\r') { 1157 while (hash && (!progress || filesize < 0) && 1158 (bytes >= hashbytes)) { 1159 (void)putc('#', ttyout); 1160 (void)fflush(ttyout); 1161 hashbytes += mark; 1162 } 1163 bytes++; 1164 if ((c = getc(din)) != '\n' || tcrflag) { 1165 if (ferror(fout)) 1166 goto break2; 1167 (void)putc('\r', fout); 1168 if (c == '\0') { 1169 bytes++; 1170 goto contin2; 1171 } 1172 if (c == EOF) 1173 goto contin2; 1174 } 1175 } 1176 (void)putc(c, fout); 1177 bytes++; 1178 contin2: ; 1179 } 1180 break2: 1181 if (hash && (!progress || filesize < 0)) { 1182 if (bytes < hashbytes) 1183 (void)putc('#', ttyout); 1184 (void)putc('\n', ttyout); 1185 } 1186 if (ferror(din)) { 1187 if (errno != EPIPE) 1188 warn("netin"); 1189 bytes = -1; 1190 } 1191 if (ferror(fout)) 1192 warn("local: %s", local); 1193 break; 1194 } 1195 1196 progressmeter(1); 1197 if (closefunc != NULL) { 1198 (*closefunc)(fout); 1199 fout = NULL; 1200 } 1201 (void)fclose(din); 1202 din = NULL; 1203 (void)getreply(0); 1204 if (bare_lfs) { 1205 fprintf(ttyout, 1206 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1207 bare_lfs); 1208 fputs("File may not have transferred correctly.\n", ttyout); 1209 } 1210 if (bytes >= 0 && is_retr) { 1211 if (bytes > 0) 1212 ptransfer(0); 1213 if (preserve && (closefunc == fclose)) { 1214 mtime = remotemodtime(remote, 0); 1215 if (mtime != -1) { 1216 (void)gettimeofday(&tval[0], NULL); 1217 tval[1].tv_sec = mtime; 1218 tval[1].tv_usec = 0; 1219 if (utimes(local, tval) == -1) { 1220 fprintf(ttyout, 1221 "Can't change modification time on %s to %s", 1222 local, asctime(localtime(&mtime))); 1223 } 1224 } 1225 } 1226 } 1227 goto cleanuprecv; 1228 1229 abort: 1230 /* 1231 * abort using RFC 959 recommended IP,SYNC sequence 1232 */ 1233 if (! sigsetjmp(xferabort, 1)) { 1234 /* this is the first call */ 1235 (void)xsignal(SIGINT, abort_squared); 1236 if (!cpend) { 1237 code = -1; 1238 goto cleanuprecv; 1239 } 1240 abort_remote(din); 1241 } 1242 code = -1; 1243 if (bytes > 0) 1244 ptransfer(0); 1245 1246 cleanuprecv: 1247 if (oldintr) 1248 (void)xsignal(SIGINT, oldintr); 1249 if (oldintp) 1250 (void)xsignal(SIGPIPE, oldintp); 1251 if (data >= 0) { 1252 (void)close(data); 1253 data = -1; 1254 } 1255 if (closefunc != NULL && fout != NULL) 1256 (*closefunc)(fout); 1257 if (din) 1258 (void)fclose(din); 1259 progress = oprogress; 1260 preserve = opreserve; 1261 bytes = 0; 1262 } 1263 1264 /* 1265 * Need to start a listen on the data channel before we send the command, 1266 * otherwise the server's connect may fail. 1267 */ 1268 int 1269 initconn(void) 1270 { 1271 char *p, *a; 1272 int result, len, tmpno = 0; 1273 int on = 1; 1274 int error; 1275 u_int addr[16], port[2]; 1276 u_int af, hal, pal; 1277 char *pasvcmd = NULL; 1278 1279 #ifdef INET6 1280 if (myctladdr.su_family == AF_INET6 && debug && 1281 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1282 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1283 warnx("use of scoped address can be troublesome"); 1284 } 1285 #endif 1286 reinit: 1287 if (passivemode) { 1288 data_addr = myctladdr; 1289 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1290 if (data < 0) { 1291 warn("socket"); 1292 return (1); 1293 } 1294 if ((options & SO_DEBUG) && 1295 setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, 1296 sizeof(on)) < 0) 1297 if (debug) 1298 warn("setsockopt (ignored)"); 1299 result = COMPLETE + 1; 1300 switch (data_addr.su_family) { 1301 case AF_INET: 1302 if (epsv4 && !epsv4bad) { 1303 pasvcmd = "EPSV"; 1304 result = command("EPSV"); 1305 if (!connected) 1306 return (1); 1307 /* 1308 * this code is to be friendly with broken 1309 * BSDI ftpd 1310 */ 1311 if (code / 10 == 22 && code != 229) { 1312 fputs( 1313 "wrong server: return code must be 229\n", 1314 ttyout); 1315 result = COMPLETE + 1; 1316 } 1317 if (result != COMPLETE) { 1318 epsv4bad = 1; 1319 if (debug) 1320 fputs( 1321 "disabling epsv4 for this connection\n", 1322 ttyout); 1323 } 1324 } 1325 if (result != COMPLETE) { 1326 pasvcmd = "PASV"; 1327 result = command("PASV"); 1328 if (!connected) 1329 return (1); 1330 } 1331 break; 1332 #ifdef INET6 1333 case AF_INET6: 1334 pasvcmd = "EPSV"; 1335 result = command("EPSV"); 1336 if (!connected) 1337 return (1); 1338 /* this code is to be friendly with broken BSDI ftpd */ 1339 if (code / 10 == 22 && code != 229) { 1340 fputs( 1341 "wrong server: return code must be 229\n", 1342 ttyout); 1343 result = COMPLETE + 1; 1344 } 1345 if (result != COMPLETE) { 1346 pasvcmd = "LPSV"; 1347 result = command("LPSV"); 1348 } 1349 if (!connected) 1350 return (1); 1351 break; 1352 #endif 1353 default: 1354 result = COMPLETE + 1; 1355 break; 1356 } 1357 if (result != COMPLETE) { 1358 if (activefallback) { 1359 (void)close(data); 1360 data = -1; 1361 passivemode = 0; 1362 #if 0 1363 activefallback = 0; 1364 #endif 1365 goto reinit; 1366 } 1367 fputs("Passive mode refused.\n", ttyout); 1368 goto bad; 1369 } 1370 1371 #define pack2(var, off) \ 1372 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1373 #define pack4(var, off) \ 1374 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1375 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1376 #define UC(b) (((int)b)&0xff) 1377 1378 /* 1379 * What we've got at this point is a string of comma separated 1380 * one-byte unsigned integer values, separated by commas. 1381 */ 1382 if (strcmp(pasvcmd, "PASV") == 0) { 1383 if (data_addr.su_family != AF_INET) { 1384 fputs( 1385 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1386 error = 1; 1387 goto bad; 1388 } 1389 if (code / 10 == 22 && code != 227) { 1390 fputs("wrong server: return code must be 227\n", 1391 ttyout); 1392 error = 1; 1393 goto bad; 1394 } 1395 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1396 &addr[0], &addr[1], &addr[2], &addr[3], 1397 &port[0], &port[1]); 1398 if (error != 6) { 1399 fputs( 1400 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1401 error = 1; 1402 goto bad; 1403 } 1404 error = 0; 1405 memset(&data_addr, 0, sizeof(data_addr)); 1406 data_addr.su_family = AF_INET; 1407 data_addr.su_len = sizeof(struct sockaddr_in); 1408 data_addr.si_su.su_sin.sin_addr.s_addr = 1409 htonl(pack4(addr, 0)); 1410 data_addr.su_port = htons(pack2(port, 0)); 1411 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1412 if (code / 10 == 22 && code != 228) { 1413 fputs("wrong server: return code must be 228\n", 1414 ttyout); 1415 error = 1; 1416 goto bad; 1417 } 1418 switch (data_addr.su_family) { 1419 case AF_INET: 1420 error = sscanf(pasv, 1421 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1422 &af, &hal, 1423 &addr[0], &addr[1], &addr[2], &addr[3], 1424 &pal, &port[0], &port[1]); 1425 if (error != 9) { 1426 fputs( 1427 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1428 error = 1; 1429 goto bad; 1430 } 1431 if (af != 4 || hal != 4 || pal != 2) { 1432 fputs( 1433 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1434 error = 1; 1435 goto bad; 1436 } 1437 1438 error = 0; 1439 memset(&data_addr, 0, sizeof(data_addr)); 1440 data_addr.su_family = AF_INET; 1441 data_addr.su_len = sizeof(struct sockaddr_in); 1442 data_addr.si_su.su_sin.sin_addr.s_addr = 1443 htonl(pack4(addr, 0)); 1444 data_addr.su_port = htons(pack2(port, 0)); 1445 break; 1446 #ifdef INET6 1447 case AF_INET6: 1448 error = sscanf(pasv, 1449 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1450 &af, &hal, 1451 &addr[0], &addr[1], &addr[2], &addr[3], 1452 &addr[4], &addr[5], &addr[6], &addr[7], 1453 &addr[8], &addr[9], &addr[10], 1454 &addr[11], &addr[12], &addr[13], 1455 &addr[14], &addr[15], 1456 &pal, &port[0], &port[1]); 1457 if (error != 21) { 1458 fputs( 1459 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1460 error = 1; 1461 goto bad; 1462 } 1463 if (af != 6 || hal != 16 || pal != 2) { 1464 fputs( 1465 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1466 error = 1; 1467 goto bad; 1468 } 1469 1470 error = 0; 1471 memset(&data_addr, 0, sizeof(data_addr)); 1472 data_addr.su_family = AF_INET6; 1473 data_addr.su_len = sizeof(struct sockaddr_in6); 1474 { 1475 int i; 1476 for (i = 0; i < sizeof(struct in6_addr); i++) { 1477 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1478 UC(addr[i]); 1479 } 1480 } 1481 data_addr.su_port = htons(pack2(port, 0)); 1482 break; 1483 #endif 1484 default: 1485 error = 1; 1486 } 1487 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1488 char delim[4]; 1489 1490 port[0] = 0; 1491 if (code / 10 == 22 && code != 229) { 1492 fputs("wrong server: return code must be 229\n", 1493 ttyout); 1494 error = 1; 1495 goto bad; 1496 } 1497 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1498 &delim[1], &delim[2], &port[1], 1499 &delim[3]) != 5) { 1500 fputs("parse error!\n", ttyout); 1501 error = 1; 1502 goto bad; 1503 } 1504 if (delim[0] != delim[1] || delim[0] != delim[2] 1505 || delim[0] != delim[3]) { 1506 fputs("parse error!\n", ttyout); 1507 error = 1; 1508 goto bad; 1509 } 1510 data_addr = hisctladdr; 1511 data_addr.su_port = htons(port[1]); 1512 } else 1513 goto bad; 1514 1515 while (xconnect(data, (struct sockaddr *)&data_addr.si_su, 1516 data_addr.su_len) < 0) { 1517 if (activefallback) { 1518 (void)close(data); 1519 data = -1; 1520 passivemode = 0; 1521 #if 0 1522 activefallback = 0; 1523 #endif 1524 goto reinit; 1525 } 1526 warn("connect"); 1527 goto bad; 1528 } 1529 #ifdef IPTOS_THROUGHPUT 1530 if (data_addr.su_family == AF_INET) { 1531 on = IPTOS_THROUGHPUT; 1532 if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, 1533 sizeof(int)) < 0) 1534 if (debug) 1535 warn("setsockopt TOS (ignored)"); 1536 } 1537 #endif 1538 return (0); 1539 } 1540 1541 noport: 1542 data_addr = myctladdr; 1543 if (sendport) 1544 data_addr.su_port = 0; /* let system pick one */ 1545 if (data != -1) 1546 (void)close(data); 1547 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1548 if (data < 0) { 1549 warn("socket"); 1550 if (tmpno) 1551 sendport = 1; 1552 return (1); 1553 } 1554 if (!sendport) 1555 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, (char *)&on, 1556 sizeof(on)) < 0) { 1557 warn("setsockopt (reuse address)"); 1558 goto bad; 1559 } 1560 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1561 data_addr.su_len) < 0) { 1562 warn("bind"); 1563 goto bad; 1564 } 1565 if (options & SO_DEBUG && 1566 setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, 1567 sizeof(on)) < 0) 1568 if (debug) 1569 warn("setsockopt (ignored)"); 1570 len = sizeof(data_addr.si_su); 1571 memset((char *)&data_addr, 0, sizeof (data_addr)); 1572 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) < 0) { 1573 warn("getsockname"); 1574 goto bad; 1575 } 1576 data_addr.su_len = len; 1577 if (xlisten(data, 1) < 0) 1578 warn("listen"); 1579 1580 if (sendport) { 1581 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1582 int af; 1583 struct sockinet tmp; 1584 1585 switch (data_addr.su_family) { 1586 case AF_INET: 1587 if (!epsv4 || epsv4bad) { 1588 result = COMPLETE + 1; 1589 break; 1590 } 1591 /* FALLTHROUGH */ 1592 #ifdef INET6 1593 case AF_INET6: 1594 #endif 1595 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1596 tmp = data_addr; 1597 #ifdef INET6 1598 if (tmp.su_family == AF_INET6) 1599 tmp.si_su.su_sin6.sin6_scope_id = 0; 1600 #endif 1601 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1602 tmp.su_len, hname, sizeof(hname), sname, 1603 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1604 result = ERROR; 1605 } else { 1606 result = command("EPRT |%d|%s|%s|", af, hname, 1607 sname); 1608 if (!connected) 1609 return (1); 1610 if (result != COMPLETE) { 1611 epsv4bad = 1; 1612 if (debug) 1613 fputs( 1614 "disabling epsv4 for this connection\n", 1615 ttyout); 1616 } 1617 } 1618 break; 1619 default: 1620 result = COMPLETE + 1; 1621 break; 1622 } 1623 if (result == COMPLETE) 1624 goto skip_port; 1625 1626 switch (data_addr.su_family) { 1627 case AF_INET: 1628 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1629 p = (char *)&data_addr.su_port; 1630 result = command("PORT %d,%d,%d,%d,%d,%d", 1631 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1632 UC(p[0]), UC(p[1])); 1633 break; 1634 #ifdef INET6 1635 case AF_INET6: 1636 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1637 p = (char *)&data_addr.su_port; 1638 result = command( 1639 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1640 6, 16, 1641 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1642 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1643 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1644 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1645 2, UC(p[0]), UC(p[1])); 1646 break; 1647 #endif 1648 default: 1649 result = COMPLETE + 1; /* xxx */ 1650 } 1651 if (!connected) 1652 return (1); 1653 skip_port: 1654 1655 if (result == ERROR && sendport == -1) { 1656 sendport = 0; 1657 tmpno = 1; 1658 goto noport; 1659 } 1660 return (result != COMPLETE); 1661 } 1662 if (tmpno) 1663 sendport = 1; 1664 #ifdef IPTOS_THROUGHPUT 1665 if (data_addr.su_family == AF_INET) { 1666 on = IPTOS_THROUGHPUT; 1667 if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, 1668 sizeof(int)) < 0) 1669 if (debug) 1670 warn("setsockopt TOS (ignored)"); 1671 } 1672 #endif 1673 return (0); 1674 bad: 1675 (void)close(data); 1676 data = -1; 1677 if (tmpno) 1678 sendport = 1; 1679 return (1); 1680 } 1681 1682 FILE * 1683 dataconn(const char *lmode) 1684 { 1685 struct sockinet from; 1686 int s, fromlen, flags, rv, timeout; 1687 struct timeval endtime, now, td; 1688 struct pollfd pfd[1]; 1689 1690 if (passivemode) /* passive data connection */ 1691 return (fdopen(data, lmode)); 1692 1693 /* active mode data connection */ 1694 1695 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1696 goto dataconn_failed; /* get current socket flags */ 1697 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1698 goto dataconn_failed; /* set non-blocking connect */ 1699 1700 /* NOTE: we now must restore socket flags on successful exit */ 1701 1702 /* limit time waiting on listening socket */ 1703 pfd[0].fd = data; 1704 pfd[0].events = POLLIN; 1705 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1706 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1707 /* without -q, default to 60s */ 1708 do { 1709 (void)gettimeofday(&now, NULL); 1710 timersub(&endtime, &now, &td); 1711 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1712 if (timeout < 0) 1713 timeout = 0; 1714 rv = xpoll(pfd, 1, timeout); 1715 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1716 if (rv == -1) { 1717 warn("poll waiting before accept"); 1718 goto dataconn_failed; 1719 } 1720 if (rv == 0) { 1721 warn("poll timeout waiting before accept"); 1722 goto dataconn_failed; 1723 } 1724 1725 /* (non-blocking) accept the connection */ 1726 fromlen = myctladdr.su_len; 1727 do { 1728 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1729 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1730 if (s == -1) { 1731 warn("accept"); 1732 goto dataconn_failed; 1733 } 1734 1735 (void)close(data); 1736 data = s; 1737 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1738 goto dataconn_failed; 1739 1740 #ifdef IPTOS_THROUGHPUT 1741 if (from.su_family == AF_INET) { 1742 int tos = IPTOS_THROUGHPUT; 1743 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, 1744 sizeof(int)) < 0) { 1745 if (debug) 1746 warn("setsockopt TOS (ignored)"); 1747 } 1748 } 1749 #endif 1750 return (fdopen(data, lmode)); 1751 1752 dataconn_failed: 1753 (void)close(data); 1754 data = -1; 1755 return (NULL); 1756 } 1757 1758 void 1759 psabort(int notused) 1760 { 1761 int oerrno = errno; 1762 1763 sigint_raised = 1; 1764 alarmtimer(0); 1765 abrtflag++; 1766 errno = oerrno; 1767 } 1768 1769 void 1770 pswitch(int flag) 1771 { 1772 sigfunc oldintr; 1773 static struct comvars { 1774 int connect; 1775 char name[MAXHOSTNAMELEN]; 1776 struct sockinet mctl; 1777 struct sockinet hctl; 1778 FILE *in; 1779 FILE *out; 1780 int tpe; 1781 int curtpe; 1782 int cpnd; 1783 int sunqe; 1784 int runqe; 1785 int mcse; 1786 int ntflg; 1787 char nti[17]; 1788 char nto[17]; 1789 int mapflg; 1790 char mi[MAXPATHLEN]; 1791 char mo[MAXPATHLEN]; 1792 } proxstruct, tmpstruct; 1793 struct comvars *ip, *op; 1794 1795 abrtflag = 0; 1796 oldintr = xsignal(SIGINT, psabort); 1797 if (flag) { 1798 if (proxy) 1799 return; 1800 ip = &tmpstruct; 1801 op = &proxstruct; 1802 proxy++; 1803 } else { 1804 if (!proxy) 1805 return; 1806 ip = &proxstruct; 1807 op = &tmpstruct; 1808 proxy = 0; 1809 } 1810 ip->connect = connected; 1811 connected = op->connect; 1812 if (hostname) 1813 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1814 else 1815 ip->name[0] = '\0'; 1816 hostname = op->name; 1817 ip->hctl = hisctladdr; 1818 hisctladdr = op->hctl; 1819 ip->mctl = myctladdr; 1820 myctladdr = op->mctl; 1821 ip->in = cin; 1822 cin = op->in; 1823 ip->out = cout; 1824 cout = op->out; 1825 ip->tpe = type; 1826 type = op->tpe; 1827 ip->curtpe = curtype; 1828 curtype = op->curtpe; 1829 ip->cpnd = cpend; 1830 cpend = op->cpnd; 1831 ip->sunqe = sunique; 1832 sunique = op->sunqe; 1833 ip->runqe = runique; 1834 runique = op->runqe; 1835 ip->mcse = mcase; 1836 mcase = op->mcse; 1837 ip->ntflg = ntflag; 1838 ntflag = op->ntflg; 1839 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1840 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1841 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1842 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1843 ip->mapflg = mapflag; 1844 mapflag = op->mapflg; 1845 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1846 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1847 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1848 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1849 (void)xsignal(SIGINT, oldintr); 1850 if (abrtflag) { 1851 abrtflag = 0; 1852 (*oldintr)(SIGINT); 1853 } 1854 } 1855 1856 void 1857 abortpt(int notused) 1858 { 1859 1860 sigint_raised = 1; 1861 alarmtimer(0); 1862 if (fromatty) 1863 write(fileno(ttyout), "\n", 1); 1864 ptabflg++; 1865 mflag = 0; 1866 abrtflag = 0; 1867 siglongjmp(ptabort, 1); 1868 } 1869 1870 void 1871 proxtrans(const char *cmd, const char *local, const char *remote) 1872 { 1873 sigfunc oldintr; 1874 int prox_type, nfnd; 1875 volatile int secndflag; 1876 char *cmd2; 1877 1878 #ifdef __GNUC__ /* to shut up gcc warnings */ 1879 (void)&oldintr; 1880 (void)&cmd2; 1881 #endif 1882 1883 oldintr = NULL; 1884 secndflag = 0; 1885 if (strcmp(cmd, "RETR")) 1886 cmd2 = "RETR"; 1887 else 1888 cmd2 = runique ? "STOU" : "STOR"; 1889 if ((prox_type = type) == 0) { 1890 if (unix_server && unix_proxy) 1891 prox_type = TYPE_I; 1892 else 1893 prox_type = TYPE_A; 1894 } 1895 if (curtype != prox_type) 1896 changetype(prox_type, 1); 1897 if (command("PASV") != COMPLETE) { 1898 fputs("proxy server does not support third party transfers.\n", 1899 ttyout); 1900 return; 1901 } 1902 pswitch(0); 1903 if (!connected) { 1904 fputs("No primary connection.\n", ttyout); 1905 pswitch(1); 1906 code = -1; 1907 return; 1908 } 1909 if (curtype != prox_type) 1910 changetype(prox_type, 1); 1911 if (command("PORT %s", pasv) != COMPLETE) { 1912 pswitch(1); 1913 return; 1914 } 1915 if (sigsetjmp(ptabort, 1)) 1916 goto abort; 1917 oldintr = xsignal(SIGINT, abortpt); 1918 if ((restart_point && 1919 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1920 || (command("%s %s", cmd, remote) != PRELIM)) { 1921 (void)xsignal(SIGINT, oldintr); 1922 pswitch(1); 1923 return; 1924 } 1925 sleep(2); 1926 pswitch(1); 1927 secndflag++; 1928 if ((restart_point && 1929 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1930 || (command("%s %s", cmd2, local) != PRELIM)) 1931 goto abort; 1932 ptflag++; 1933 (void)getreply(0); 1934 pswitch(0); 1935 (void)getreply(0); 1936 (void)xsignal(SIGINT, oldintr); 1937 pswitch(1); 1938 ptflag = 0; 1939 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1940 return; 1941 abort: 1942 if (sigsetjmp(xferabort, 1)) { 1943 (void)xsignal(SIGINT, oldintr); 1944 return; 1945 } 1946 (void)xsignal(SIGINT, abort_squared); 1947 ptflag = 0; 1948 if (strcmp(cmd, "RETR") && !proxy) 1949 pswitch(1); 1950 else if (!strcmp(cmd, "RETR") && proxy) 1951 pswitch(0); 1952 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1953 if (command("%s %s", cmd2, local) != PRELIM) { 1954 pswitch(0); 1955 if (cpend) 1956 abort_remote(NULL); 1957 } 1958 pswitch(1); 1959 if (ptabflg) 1960 code = -1; 1961 (void)xsignal(SIGINT, oldintr); 1962 return; 1963 } 1964 if (cpend) 1965 abort_remote(NULL); 1966 pswitch(!proxy); 1967 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1968 if (command("%s %s", cmd2, local) != PRELIM) { 1969 pswitch(0); 1970 if (cpend) 1971 abort_remote(NULL); 1972 pswitch(1); 1973 if (ptabflg) 1974 code = -1; 1975 (void)xsignal(SIGINT, oldintr); 1976 return; 1977 } 1978 } 1979 if (cpend) 1980 abort_remote(NULL); 1981 pswitch(!proxy); 1982 if (cpend) { 1983 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1984 if (nfnd < 0) 1985 warn("abort"); 1986 if (ptabflg) 1987 code = -1; 1988 lostpeer(0); 1989 } 1990 (void)getreply(0); 1991 (void)getreply(0); 1992 } 1993 if (proxy) 1994 pswitch(0); 1995 pswitch(1); 1996 if (ptabflg) 1997 code = -1; 1998 (void)xsignal(SIGINT, oldintr); 1999 } 2000 2001 void 2002 reset(int argc, char *argv[]) 2003 { 2004 int nfnd = 1; 2005 2006 if (argc == 0 && argv != NULL) { 2007 fprintf(ttyout, "usage: %s\n", argv[0]); 2008 code = -1; 2009 return; 2010 } 2011 while (nfnd > 0) { 2012 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2013 warn("reset"); 2014 code = -1; 2015 lostpeer(0); 2016 } else if (nfnd) 2017 (void)getreply(0); 2018 } 2019 } 2020 2021 char * 2022 gunique(const char *local) 2023 { 2024 static char new[MAXPATHLEN]; 2025 char *cp = strrchr(local, '/'); 2026 int d, count=0, len; 2027 char ext = '1'; 2028 2029 if (cp) 2030 *cp = '\0'; 2031 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2032 if (cp) 2033 *cp = '/'; 2034 if (d < 0) { 2035 warn("local: %s", local); 2036 return (NULL); 2037 } 2038 len = strlcpy(new, local, sizeof(new)); 2039 cp = &new[len]; 2040 *cp++ = '.'; 2041 while (!d) { 2042 if (++count == 100) { 2043 fputs("runique: can't find unique file name.\n", 2044 ttyout); 2045 return (NULL); 2046 } 2047 *cp++ = ext; 2048 *cp = '\0'; 2049 if (ext == '9') 2050 ext = '0'; 2051 else 2052 ext++; 2053 if ((d = access(new, F_OK)) < 0) 2054 break; 2055 if (ext != '0') 2056 cp--; 2057 else if (*(cp - 2) == '.') 2058 *(cp - 1) = '1'; 2059 else { 2060 *(cp - 2) = *(cp - 2) + 1; 2061 cp--; 2062 } 2063 } 2064 return (new); 2065 } 2066 2067 /* 2068 * abort_squared -- 2069 * aborts abort_remote(). lostpeer() is called because if the user is 2070 * too impatient to wait or there's another problem then ftp really 2071 * needs to get back to a known state. 2072 */ 2073 void 2074 abort_squared(int dummy) 2075 { 2076 char msgbuf[100]; 2077 int len; 2078 2079 sigint_raised = 1; 2080 alarmtimer(0); 2081 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2082 sizeof(msgbuf)); 2083 write(fileno(ttyout), msgbuf, len); 2084 lostpeer(0); 2085 siglongjmp(xferabort, 1); 2086 } 2087 2088 void 2089 abort_remote(FILE *din) 2090 { 2091 char buf[BUFSIZ]; 2092 int nfnd; 2093 2094 if (cout == NULL) { 2095 warnx("Lost control connection for abort."); 2096 if (ptabflg) 2097 code = -1; 2098 lostpeer(0); 2099 return; 2100 } 2101 /* 2102 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2103 * after urgent byte rather than before as is protocol now 2104 */ 2105 buf[0] = IAC; 2106 buf[1] = IP; 2107 buf[2] = IAC; 2108 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2109 warn("abort"); 2110 fprintf(cout, "%cABOR\r\n", DM); 2111 (void)fflush(cout); 2112 if ((nfnd = empty(cin, din, 10)) <= 0) { 2113 if (nfnd < 0) 2114 warn("abort"); 2115 if (ptabflg) 2116 code = -1; 2117 lostpeer(0); 2118 } 2119 if (din && (nfnd & 2)) { 2120 while (read(fileno(din), buf, BUFSIZ) > 0) 2121 continue; 2122 } 2123 if (getreply(0) == ERROR && code == 552) { 2124 /* 552 needed for nic style abort */ 2125 (void)getreply(0); 2126 } 2127 (void)getreply(0); 2128 } 2129 2130 void 2131 ai_unmapped(struct addrinfo *ai) 2132 { 2133 #ifdef INET6 2134 struct sockaddr_in6 *sin6; 2135 struct sockaddr_in sin; 2136 int len; 2137 2138 if (ai->ai_family != AF_INET6) 2139 return; 2140 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2141 sizeof(sin) > ai->ai_addrlen) 2142 return; 2143 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2144 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2145 return; 2146 2147 memset(&sin, 0, sizeof(sin)); 2148 sin.sin_family = AF_INET; 2149 len = sizeof(struct sockaddr_in); 2150 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2151 sizeof(sin.sin_addr)); 2152 sin.sin_port = sin6->sin6_port; 2153 2154 ai->ai_family = AF_INET; 2155 #if HAVE_SOCKADDR_SA_LEN 2156 sin.sin_len = len; 2157 #endif 2158 memcpy(ai->ai_addr, &sin, len); 2159 ai->ai_addrlen = len; 2160 #endif 2161 } 2162