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 99#include <sys/types.h> 100#include <sys/stat.h> 101#include <sys/socket.h> 102#include <sys/time.h> 103 104#include <netinet/in.h> 105#include <netinet/ip.h> 106#include <arpa/inet.h> 107#include <arpa/ftp.h> 108#include <arpa/telnet.h> 109 110#include <ctype.h> 111#include <err.h> 112#include <errno.h> 113#include <fcntl.h> 114#include <netdb.h> 115#include <stdio.h> 116#include <stdlib.h> 117#include <string.h> 118#include <time.h> 119#include <unistd.h> 120#include <stdarg.h> 121 122#include "ftp_var.h" 123 124volatile sig_atomic_t abrtflag; 125volatile sig_atomic_t timeoutflag; 126 127sigjmp_buf ptabort; 128int ptabflg; 129int ptflag = 0; 130char pasv[BUFSIZ]; /* passive port for proxy data connection */ 131 132static int empty(FILE *, FILE *, int); 133 134struct sockinet { 135 union sockunion { 136 struct sockaddr_in su_sin; 137#ifdef INET6 138 struct sockaddr_in6 su_sin6; 139#endif 140 } si_su; 141#if !HAVE_SOCKADDR_SA_LEN 142 int si_len; 143#endif 144}; 145 146#if !HAVE_SOCKADDR_SA_LEN 147# define su_len si_len 148#else 149# define su_len si_su.su_sin.sin_len 150#endif 151#define su_family si_su.su_sin.sin_family 152#define su_port si_su.su_sin.sin_port 153 154struct sockinet myctladdr, hisctladdr, data_addr; 155 156char * 157hookup(char *host, char *port) 158{ 159 int s = -1, error, portnum; 160 struct addrinfo hints, *res, *res0; 161 char hbuf[MAXHOSTNAMELEN]; 162 static char hostnamebuf[MAXHOSTNAMELEN]; 163 char *cause = "unknown"; 164 socklen_t len; 165 int on = 1; 166 167 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 168 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 169 memset(&hints, 0, sizeof(hints)); 170 portnum = parseport(port, FTP_PORT); 171 hints.ai_flags = AI_CANONNAME; 172 hints.ai_family = family; 173 hints.ai_socktype = SOCK_STREAM; 174 hints.ai_protocol = 0; 175 error = getaddrinfo(host, NULL, &hints, &res0); 176 if (error) { 177 warnx("%s", gai_strerror(error)); 178 code = -1; 179 return (0); 180 } 181 182 if (res0->ai_canonname) 183 (void)strlcpy(hostnamebuf, res0->ai_canonname, 184 sizeof(hostnamebuf)); 185 else 186 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 187 hostname = hostnamebuf; 188 189 for (res = res0; res; res = res->ai_next) { 190 /* 191 * make sure that ai_addr is NOT an IPv4 mapped address. 192 * IPv4 mapped address complicates too many things in FTP 193 * protocol handling, as FTP protocol is defined differently 194 * between IPv4 and IPv6. 195 * 196 * This may not be the best way to handle this situation, 197 * since the semantics of IPv4 mapped address is defined in 198 * the kernel. There are configurations where we should use 199 * IPv4 mapped address as native IPv6 address, not as 200 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 201 * 202 * More complete solution would be to have an additional 203 * getsockopt to grab "real" peername/sockname. "real" 204 * peername/sockname will be AF_INET if IPv4 mapped address 205 * is used to embed IPv4 address, and will be AF_INET6 if 206 * we use it as native. What a mess! 207 */ 208 ai_unmapped(res); 209#if 0 /*old behavior*/ 210 if (res != res0) /* not on the first address */ 211#else 212 if (res0->ai_next) /* if we have multiple possibilities */ 213#endif 214 { 215 if (getnameinfo(res->ai_addr, res->ai_addrlen, 216 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 217 strlcpy(hbuf, "?", sizeof(hbuf)); 218 fprintf(ttyout, "Trying %s...\n", hbuf); 219 } 220 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 221 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 222 if (s < 0) { 223 cause = "socket"; 224 continue; 225 } 226 error = xconnect(s, res->ai_addr, res->ai_addrlen); 227 if (error) { 228 /* this "if" clause is to prevent print warning twice */ 229 if (res->ai_next) { 230 if (getnameinfo(res->ai_addr, res->ai_addrlen, 231 hbuf, sizeof(hbuf), NULL, 0, 232 NI_NUMERICHOST)) 233 strlcpy(hbuf, "?", sizeof(hbuf)); 234 warn("connect to address %s", hbuf); 235 } 236 cause = "connect"; 237 close(s); 238 s = -1; 239 continue; 240 } 241 242 /* finally we got one */ 243 break; 244 } 245 if (s < 0) { 246 warn("%s", cause); 247 code = -1; 248 freeaddrinfo(res0); 249 return 0; 250 } 251 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 252 hisctladdr.su_len = res->ai_addrlen; 253 freeaddrinfo(res0); 254 res0 = res = NULL; 255 256 len = hisctladdr.su_len; 257 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 258 warn("getsockname"); 259 code = -1; 260 goto bad; 261 } 262 myctladdr.su_len = len; 263 264#ifdef IPTOS_LOWDELAY 265 if (hisctladdr.su_family == AF_INET) { 266 int tos = IPTOS_LOWDELAY; 267 if (setsockopt(s, IPPROTO_IP, IP_TOS, 268 (void *)&tos, sizeof(tos)) == -1) { 269 if (debug) 270 warn("setsockopt %s (ignored)", 271 "IPTOS_LOWDELAY"); 272 } 273 } 274#endif 275 cin = fdopen(s, "r"); 276 cout = fdopen(s, "w"); 277 if (cin == NULL || cout == NULL) { 278 warnx("fdopen failed."); 279 if (cin) 280 (void)fclose(cin); 281 if (cout) 282 (void)fclose(cout); 283 code = -1; 284 goto bad; 285 } 286 if (verbose) 287 fprintf(ttyout, "Connected to %s.\n", hostname); 288 if (getreply(0) > 2) { /* read startup message from server */ 289 if (cin) 290 (void)fclose(cin); 291 if (cout) 292 (void)fclose(cout); 293 code = -1; 294 goto bad; 295 } 296 297 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 298 (void *)&on, sizeof(on)) == -1) { 299 if (debug) 300 warn("setsockopt %s (ignored)", "SO_OOBINLINE"); 301 } 302 303 return (hostname); 304 bad: 305 (void)close(s); 306 return (NULL); 307} 308 309void 310cmdabort(int notused) 311{ 312 int oerrno = errno; 313 314 sigint_raised = 1; 315 alarmtimer(0); 316 if (fromatty) 317 write(fileno(ttyout), "\n", 1); 318 abrtflag++; 319 if (ptflag) 320 siglongjmp(ptabort, 1); 321 errno = oerrno; 322} 323 324void 325cmdtimeout(int notused) 326{ 327 int oerrno = errno; 328 329 alarmtimer(0); 330 if (fromatty) 331 write(fileno(ttyout), "\n", 1); 332 timeoutflag++; 333 if (ptflag) 334 siglongjmp(ptabort, 1); 335 errno = oerrno; 336} 337 338/*VARARGS*/ 339int 340command(const char *fmt, ...) 341{ 342 va_list ap; 343 int r; 344 sigfunc oldsigint; 345 346 if (debug) { 347 fputs("---> ", ttyout); 348 va_start(ap, fmt); 349 if (strncmp("PASS ", fmt, 5) == 0) 350 fputs("PASS XXXX", ttyout); 351 else if (strncmp("ACCT ", fmt, 5) == 0) 352 fputs("ACCT XXXX", ttyout); 353 else 354 vfprintf(ttyout, fmt, ap); 355 va_end(ap); 356 putc('\n', ttyout); 357 } 358 if (cout == NULL) { 359 warnx("No control connection for command."); 360 code = -1; 361 return (0); 362 } 363 364 abrtflag = 0; 365 366 oldsigint = xsignal(SIGINT, cmdabort); 367 368 va_start(ap, fmt); 369 vfprintf(cout, fmt, ap); 370 va_end(ap); 371 fputs("\r\n", cout); 372 (void)fflush(cout); 373 cpend = 1; 374 r = getreply(!strcmp(fmt, "QUIT")); 375 if (abrtflag && oldsigint != SIG_IGN) 376 (*oldsigint)(SIGINT); 377 (void)xsignal(SIGINT, oldsigint); 378 return (r); 379} 380 381int 382getreply(int expecteof) 383{ 384 char current_line[BUFSIZ]; /* last line of previous reply */ 385 int c, n, line; 386 int dig; 387 int originalcode = 0, continuation = 0; 388 sigfunc oldsigint, oldsigalrm; 389 int pflag = 0; 390 char *cp, *pt = pasv; 391 392 abrtflag = 0; 393 timeoutflag = 0; 394 395 oldsigint = xsignal(SIGINT, cmdabort); 396 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 397 398 for (line = 0 ;; line++) { 399 dig = n = code = 0; 400 cp = current_line; 401 while (alarmtimer(60),((c = getc(cin)) != '\n')) { 402 if (c == IAC) { /* handle telnet commands */ 403 switch (c = getc(cin)) { 404 case WILL: 405 case WONT: 406 c = getc(cin); 407 fprintf(cout, "%c%c%c", IAC, DONT, c); 408 (void)fflush(cout); 409 break; 410 case DO: 411 case DONT: 412 c = getc(cin); 413 fprintf(cout, "%c%c%c", IAC, WONT, c); 414 (void)fflush(cout); 415 break; 416 default: 417 break; 418 } 419 continue; 420 } 421 dig++; 422 if (c == EOF) { 423 /* 424 * these will get trashed by pswitch() 425 * in lostpeer() 426 */ 427 int reply_timeoutflag = timeoutflag; 428 int reply_abrtflag = abrtflag; 429 430 alarmtimer(0); 431 if (expecteof && feof(cin)) { 432 (void)xsignal(SIGINT, oldsigint); 433 (void)xsignal(SIGALRM, oldsigalrm); 434 code = 221; 435 return (0); 436 } 437 cpend = 0; 438 lostpeer(0); 439 if (verbose) { 440 if (reply_timeoutflag) 441 fputs( 442 "421 Service not available, remote server timed out. Connection closed\n", 443 ttyout); 444 else if (reply_abrtflag) 445 fputs( 446 "421 Service not available, user interrupt. Connection closed.\n", 447 ttyout); 448 else 449 fputs( 450 "421 Service not available, remote server has closed connection.\n", 451 ttyout); 452 (void)fflush(ttyout); 453 } 454 code = 421; 455 (void)xsignal(SIGINT, oldsigint); 456 (void)xsignal(SIGALRM, oldsigalrm); 457 return (4); 458 } 459 if (c != '\r' && (verbose > 0 || 460 ((verbose > -1 && n == '5' && dig > 4) && 461 (((!n && c < '5') || (n && n < '5')) 462 || !retry_connect)))) { 463 if (proxflag && 464 (dig == 1 || (dig == 5 && verbose == 0))) 465 fprintf(ttyout, "%s:", hostname); 466 (void)putc(c, ttyout); 467 } 468 if (dig < 4 && isdigit(c)) 469 code = code * 10 + (c - '0'); 470 if (!pflag && (code == 227 || code == 228)) 471 pflag = 1; 472 else if (!pflag && code == 229) 473 pflag = 100; 474 if (dig > 4 && pflag == 1 && isdigit(c)) 475 pflag = 2; 476 if (pflag == 2) { 477 if (c != '\r' && c != ')') { 478 if (pt < &pasv[sizeof(pasv) - 1]) 479 *pt++ = c; 480 } else { 481 *pt = '\0'; 482 pflag = 3; 483 } 484 } 485 if (pflag == 100 && c == '(') 486 pflag = 2; 487 if (dig == 4 && c == '-') { 488 if (continuation) 489 code = 0; 490 continuation++; 491 } 492 if (n == 0) 493 n = c; 494 if (cp < ¤t_line[sizeof(current_line) - 1]) 495 *cp++ = c; 496 } 497 if (verbose > 0 || ((verbose > -1 && n == '5') && 498 (n < '5' || !retry_connect))) { 499 (void)putc(c, ttyout); 500 (void)fflush (ttyout); 501 } 502 if (cp[-1] == '\r') 503 cp[-1] = '\0'; 504 *cp = '\0'; 505 if (line == 0) 506 (void)strlcpy(reply_string, current_line, 507 sizeof(reply_string)); 508 if (line > 0 && code == 0 && reply_callback != NULL) 509 (*reply_callback)(current_line); 510 if (continuation && code != originalcode) { 511 if (originalcode == 0) 512 originalcode = code; 513 continue; 514 } 515 if (n != '1') 516 cpend = 0; 517 alarmtimer(0); 518 (void)xsignal(SIGINT, oldsigint); 519 (void)xsignal(SIGALRM, oldsigalrm); 520 if (code == 421 || originalcode == 421) 521 lostpeer(0); 522 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 523 (*oldsigint)(SIGINT); 524 if (timeoutflag && oldsigalrm != cmdtimeout && 525 oldsigalrm != SIG_IGN) 526 (*oldsigalrm)(SIGINT); 527 return (n - '0'); 528 } 529} 530 531static int 532empty(FILE *cin, FILE *din, int sec) 533{ 534 int nr, nfd; 535 struct pollfd pfd[2]; 536 537 nfd = 0; 538 if (cin) { 539 pfd[nfd].fd = fileno(cin); 540 pfd[nfd++].events = POLLIN; 541 } 542 543 if (din) { 544 pfd[nfd].fd = fileno(din); 545 pfd[nfd++].events = POLLIN; 546 } 547 548 if ((nr = xpoll(pfd, nfd, sec * 1000)) <= 0) 549 return nr; 550 551 nr = 0; 552 nfd = 0; 553 if (cin) 554 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 555 if (din) 556 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 557 return nr; 558} 559 560sigjmp_buf xferabort; 561 562void 563abortxfer(int notused) 564{ 565 char msgbuf[100]; 566 size_t len; 567 568 sigint_raised = 1; 569 alarmtimer(0); 570 mflag = 0; 571 abrtflag = 0; 572 switch (direction[0]) { 573 case 'r': 574 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 575 break; 576 case 's': 577 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 578 break; 579 default: 580 errx(1, "abortxfer called with unknown direction `%s'", 581 direction); 582 } 583 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 584 sizeof(msgbuf)); 585 write(fileno(ttyout), msgbuf, len); 586 siglongjmp(xferabort, 1); 587} 588 589void 590sendrequest(const char *cmd, const char *local, const char *remote, 591 int printnames) 592{ 593 struct stat st; 594 int c, d; 595 FILE *fin, *dout; 596 int (*closefunc)(FILE *); 597 sigfunc oldintr, oldintp; 598 volatile off_t hashbytes; 599 char *lmode, *bufp; 600 static size_t bufsize; 601 static char *buf; 602 int oprogress; 603 604#ifdef __GNUC__ /* to shut up gcc warnings */ 605 (void)&fin; 606 (void)&dout; 607 (void)&closefunc; 608 (void)&oldintr; 609 (void)&oldintp; 610 (void)&lmode; 611#endif 612 613 hashbytes = mark; 614 direction = "sent"; 615 dout = NULL; 616 bytes = 0; 617 filesize = -1; 618 oprogress = progress; 619 if (verbose && printnames) { 620 if (local && *local != '-') 621 fprintf(ttyout, "local: %s ", local); 622 if (remote) 623 fprintf(ttyout, "remote: %s\n", remote); 624 } 625 if (proxy) { 626 proxtrans(cmd, local, remote); 627 return; 628 } 629 if (curtype != type) 630 changetype(type, 0); 631 closefunc = NULL; 632 oldintr = NULL; 633 oldintp = NULL; 634 lmode = "w"; 635 if (sigsetjmp(xferabort, 1)) { 636 while (cpend) 637 (void)getreply(0); 638 code = -1; 639 goto cleanupsend; 640 } 641 (void)xsignal(SIGQUIT, psummary); 642 oldintr = xsignal(SIGINT, abortxfer); 643 if (strcmp(local, "-") == 0) { 644 fin = stdin; 645 progress = 0; 646 } else if (*local == '|') { 647 oldintp = xsignal(SIGPIPE, SIG_IGN); 648 fin = popen(local + 1, "r"); 649 if (fin == NULL) { 650 warn("%s", local + 1); 651 code = -1; 652 goto cleanupsend; 653 } 654 progress = 0; 655 closefunc = pclose; 656 } else { 657 fin = fopen(local, "r"); 658 if (fin == NULL) { 659 warn("local: %s", local); 660 code = -1; 661 goto cleanupsend; 662 } 663 closefunc = fclose; 664 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 665 fprintf(ttyout, "%s: not a plain file.\n", local); 666 code = -1; 667 goto cleanupsend; 668 } 669 filesize = st.st_size; 670 } 671 if (initconn()) { 672 code = -1; 673 goto cleanupsend; 674 } 675 if (sigsetjmp(xferabort, 1)) 676 goto abort; 677 678 if (restart_point && 679 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 680 int rc; 681 682 rc = -1; 683 switch (curtype) { 684 case TYPE_A: 685 rc = fseeko(fin, restart_point, SEEK_SET); 686 break; 687 case TYPE_I: 688 case TYPE_L: 689 rc = lseek(fileno(fin), restart_point, SEEK_SET); 690 break; 691 } 692 if (rc < 0) { 693 warn("local: %s", local); 694 goto cleanupsend; 695 } 696 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 697 goto cleanupsend; 698 lmode = "r+"; 699 } 700 if (remote) { 701 if (command("%s %s", cmd, remote) != PRELIM) 702 goto cleanupsend; 703 } else { 704 if (command("%s", cmd) != PRELIM) 705 goto cleanupsend; 706 } 707 dirchange = 1; 708 dout = dataconn(lmode); 709 if (dout == NULL) 710 goto abort; 711 712 if (sndbuf_size > bufsize) { 713 if (buf) 714 (void)free(buf); 715 bufsize = sndbuf_size; 716 buf = xmalloc(bufsize); 717 } 718 719 progressmeter(-1); 720 oldintp = xsignal(SIGPIPE, SIG_IGN); 721 722 switch (curtype) { 723 724 case TYPE_I: 725 case TYPE_L: 726 if (rate_put) { /* rate limited */ 727 while (1) { 728 struct timeval then, now, td; 729 off_t bufrem; 730 731 (void)gettimeofday(&then, NULL); 732 errno = c = d = 0; 733 bufrem = rate_put; 734 while (bufrem > 0) { 735 if ((c = read(fileno(fin), buf, 736 MIN(bufsize, bufrem))) <= 0) 737 goto senddone; 738 bytes += c; 739 bufrem -= c; 740 for (bufp = buf; c > 0; 741 c -= d, bufp += d) 742 if ((d = write(fileno(dout), 743 bufp, c)) <= 0) 744 break; 745 if (d < 0) 746 goto senddone; 747 if (hash && 748 (!progress || filesize < 0) ) { 749 while (bytes >= hashbytes) { 750 (void)putc('#', ttyout); 751 hashbytes += mark; 752 } 753 (void)fflush(ttyout); 754 } 755 } 756 while (1) { 757 (void)gettimeofday(&now, NULL); 758 timersub(&now, &then, &td); 759 if (td.tv_sec > 0) 760 break; 761 usleep(1000000 - td.tv_usec); 762 } 763 } 764 } else { /* simpler/faster; no rate limit */ 765 while (1) { 766 errno = c = d = 0; 767 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 768 goto senddone; 769 bytes += c; 770 for (bufp = buf; c > 0; c -= d, bufp += d) 771 if ((d = write(fileno(dout), bufp, c)) 772 <= 0) 773 break; 774 if (d < 0) 775 goto senddone; 776 if (hash && (!progress || filesize < 0) ) { 777 while (bytes >= hashbytes) { 778 (void)putc('#', ttyout); 779 hashbytes += mark; 780 } 781 (void)fflush(ttyout); 782 } 783 } 784 } 785 senddone: 786 if (hash && (!progress || filesize < 0) && bytes > 0) { 787 if (bytes < mark) 788 (void)putc('#', ttyout); 789 (void)putc('\n', ttyout); 790 } 791 if (c < 0) 792 warn("local: %s", local); 793 if (d < 0) { 794 if (errno != EPIPE) 795 warn("netout"); 796 bytes = -1; 797 } 798 break; 799 800 case TYPE_A: 801 while ((c = getc(fin)) != EOF) { 802 if (c == '\n') { 803 while (hash && (!progress || filesize < 0) && 804 (bytes >= hashbytes)) { 805 (void)putc('#', ttyout); 806 (void)fflush(ttyout); 807 hashbytes += mark; 808 } 809 if (ferror(dout)) 810 break; 811 (void)putc('\r', dout); 812 bytes++; 813 } 814 (void)putc(c, dout); 815 bytes++; 816#if 0 /* this violates RFC */ 817 if (c == '\r') { 818 (void)putc('\0', dout); 819 bytes++; 820 } 821#endif 822 } 823 if (hash && (!progress || filesize < 0)) { 824 if (bytes < hashbytes) 825 (void)putc('#', ttyout); 826 (void)putc('\n', ttyout); 827 } 828 if (ferror(fin)) 829 warn("local: %s", local); 830 if (ferror(dout)) { 831 if (errno != EPIPE) 832 warn("netout"); 833 bytes = -1; 834 } 835 break; 836 } 837 838 progressmeter(1); 839 if (closefunc != NULL) { 840 (*closefunc)(fin); 841 fin = NULL; 842 } 843 (void)fclose(dout); 844 dout = NULL; 845 (void)getreply(0); 846 if (bytes > 0) 847 ptransfer(0); 848 goto cleanupsend; 849 850 abort: 851 (void)xsignal(SIGINT, oldintr); 852 oldintr = NULL; 853 if (!cpend) { 854 code = -1; 855 goto cleanupsend; 856 } 857 if (data >= 0) { 858 (void)close(data); 859 data = -1; 860 } 861 if (dout) { 862 (void)fclose(dout); 863 dout = NULL; 864 } 865 (void)getreply(0); 866 code = -1; 867 if (bytes > 0) 868 ptransfer(0); 869 870 cleanupsend: 871 if (oldintr) 872 (void)xsignal(SIGINT, oldintr); 873 if (oldintp) 874 (void)xsignal(SIGPIPE, oldintp); 875 if (data >= 0) { 876 (void)close(data); 877 data = -1; 878 } 879 if (closefunc != NULL && fin != NULL) 880 (*closefunc)(fin); 881 if (dout) 882 (void)fclose(dout); 883 progress = oprogress; 884 restart_point = 0; 885 bytes = 0; 886} 887 888void 889recvrequest(const char *cmd, const char *local, const char *remote, 890 const char *lmode, int printnames, int ignorespecial) 891{ 892 FILE *fout, *din; 893 int (*closefunc)(FILE *); 894 sigfunc oldintr, oldintp; 895 int c, d; 896 volatile int is_retr, tcrflag, bare_lfs; 897 static size_t bufsize; 898 static char *buf; 899 volatile off_t hashbytes; 900 struct stat st; 901 time_t mtime; 902 struct timeval tval[2]; 903 int oprogress; 904 int opreserve; 905 906#ifdef __GNUC__ /* to shut up gcc warnings */ 907 (void)&local; 908 (void)&fout; 909 (void)&din; 910 (void)&closefunc; 911 (void)&oldintr; 912 (void)&oldintp; 913#endif 914 915 fout = NULL; 916 din = NULL; 917 hashbytes = mark; 918 direction = "received"; 919 bytes = 0; 920 bare_lfs = 0; 921 filesize = -1; 922 oprogress = progress; 923 opreserve = preserve; 924 is_retr = (strcmp(cmd, "RETR") == 0); 925 if (is_retr && verbose && printnames) { 926 if (local && (ignorespecial || *local != '-')) 927 fprintf(ttyout, "local: %s ", local); 928 if (remote) 929 fprintf(ttyout, "remote: %s\n", remote); 930 } 931 if (proxy && is_retr) { 932 proxtrans(cmd, local, remote); 933 return; 934 } 935 closefunc = NULL; 936 oldintr = NULL; 937 oldintp = NULL; 938 tcrflag = !crflag && is_retr; 939 if (sigsetjmp(xferabort, 1)) { 940 while (cpend) 941 (void)getreply(0); 942 code = -1; 943 goto cleanuprecv; 944 } 945 (void)xsignal(SIGQUIT, psummary); 946 oldintr = xsignal(SIGINT, abortxfer); 947 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 948 if (access(local, W_OK) < 0) { 949 char *dir = strrchr(local, '/'); 950 951 if (errno != ENOENT && errno != EACCES) { 952 warn("local: %s", local); 953 code = -1; 954 goto cleanuprecv; 955 } 956 if (dir != NULL) 957 *dir = 0; 958 d = access(dir == local ? "/" : 959 dir ? local : ".", W_OK); 960 if (dir != NULL) 961 *dir = '/'; 962 if (d < 0) { 963 warn("local: %s", local); 964 code = -1; 965 goto cleanuprecv; 966 } 967 if (!runique && errno == EACCES && 968 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 969 warn("local: %s", local); 970 code = -1; 971 goto cleanuprecv; 972 } 973 if (runique && errno == EACCES && 974 (local = gunique(local)) == NULL) { 975 code = -1; 976 goto cleanuprecv; 977 } 978 } 979 else if (runique && (local = gunique(local)) == NULL) { 980 code = -1; 981 goto cleanuprecv; 982 } 983 } 984 if (!is_retr) { 985 if (curtype != TYPE_A) 986 changetype(TYPE_A, 0); 987 } else { 988 if (curtype != type) 989 changetype(type, 0); 990 filesize = remotesize(remote, 0); 991 if (code == 421 || code == -1) 992 goto cleanuprecv; 993 } 994 if (initconn()) { 995 code = -1; 996 goto cleanuprecv; 997 } 998 if (sigsetjmp(xferabort, 1)) 999 goto abort; 1000 if (is_retr && restart_point && 1001 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1002 goto cleanuprecv; 1003 if (! EMPTYSTRING(remote)) { 1004 if (command("%s %s", cmd, remote) != PRELIM) 1005 goto cleanuprecv; 1006 } else { 1007 if (command("%s", cmd) != PRELIM) 1008 goto cleanuprecv; 1009 } 1010 din = dataconn("r"); 1011 if (din == NULL) 1012 goto abort; 1013 if (!ignorespecial && strcmp(local, "-") == 0) { 1014 fout = stdout; 1015 progress = 0; 1016 preserve = 0; 1017 } else if (!ignorespecial && *local == '|') { 1018 oldintp = xsignal(SIGPIPE, SIG_IGN); 1019 fout = popen(local + 1, "w"); 1020 if (fout == NULL) { 1021 warn("%s", local+1); 1022 goto abort; 1023 } 1024 progress = 0; 1025 preserve = 0; 1026 closefunc = pclose; 1027 } else { 1028 fout = fopen(local, lmode); 1029 if (fout == NULL) { 1030 warn("local: %s", local); 1031 goto abort; 1032 } 1033 closefunc = fclose; 1034 } 1035 1036 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1037 progress = 0; 1038 preserve = 0; 1039 } 1040 if (rcvbuf_size > bufsize) { 1041 if (buf) 1042 (void)free(buf); 1043 bufsize = rcvbuf_size; 1044 buf = xmalloc(bufsize); 1045 } 1046 1047 progressmeter(-1); 1048 1049 switch (curtype) { 1050 1051 case TYPE_I: 1052 case TYPE_L: 1053 if (is_retr && restart_point && 1054 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1055 warn("local: %s", local); 1056 goto cleanuprecv; 1057 } 1058 if (rate_get) { /* rate limiting */ 1059 while (1) { 1060 struct timeval then, now, td; 1061 off_t bufrem; 1062 1063 (void)gettimeofday(&then, NULL); 1064 errno = c = d = 0; 1065 for (bufrem = rate_get; bufrem > 0; ) { 1066 if ((c = read(fileno(din), buf, 1067 MIN(bufsize, bufrem))) <= 0) 1068 goto recvdone; 1069 bytes += c; 1070 bufrem -=c; 1071 if ((d = write(fileno(fout), buf, c)) 1072 != c) 1073 goto recvdone; 1074 if (hash && 1075 (!progress || filesize < 0)) { 1076 while (bytes >= hashbytes) { 1077 (void)putc('#', ttyout); 1078 hashbytes += mark; 1079 } 1080 (void)fflush(ttyout); 1081 } 1082 } 1083 /* sleep until time is up */ 1084 while (1) { 1085 (void)gettimeofday(&now, NULL); 1086 timersub(&now, &then, &td); 1087 if (td.tv_sec > 0) 1088 break; 1089 usleep(1000000 - td.tv_usec); 1090 } 1091 } 1092 } else { /* faster code (no limiting) */ 1093 while (1) { 1094 errno = c = d = 0; 1095 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1096 goto recvdone; 1097 bytes += c; 1098 if ((d = write(fileno(fout), buf, c)) != c) 1099 goto recvdone; 1100 if (hash && (!progress || filesize < 0)) { 1101 while (bytes >= hashbytes) { 1102 (void)putc('#', ttyout); 1103 hashbytes += mark; 1104 } 1105 (void)fflush(ttyout); 1106 } 1107 } 1108 } 1109 recvdone: 1110 if (hash && (!progress || filesize < 0) && bytes > 0) { 1111 if (bytes < mark) 1112 (void)putc('#', ttyout); 1113 (void)putc('\n', ttyout); 1114 } 1115 if (c < 0) { 1116 if (errno != EPIPE) 1117 warn("netin"); 1118 bytes = -1; 1119 } 1120 if (d < c) { 1121 if (d < 0) 1122 warn("local: %s", local); 1123 else 1124 warnx("%s: short write", local); 1125 } 1126 break; 1127 1128 case TYPE_A: 1129 if (is_retr && restart_point) { 1130 int ch; 1131 off_t i; 1132 1133 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1134 goto done; 1135 for (i = 0; i++ < restart_point;) { 1136 if ((ch = getc(fout)) == EOF) 1137 goto done; 1138 if (ch == '\n') 1139 i++; 1140 } 1141 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1142 done: 1143 warn("local: %s", local); 1144 goto cleanuprecv; 1145 } 1146 } 1147 while ((c = getc(din)) != EOF) { 1148 if (c == '\n') 1149 bare_lfs++; 1150 while (c == '\r') { 1151 while (hash && (!progress || filesize < 0) && 1152 (bytes >= hashbytes)) { 1153 (void)putc('#', ttyout); 1154 (void)fflush(ttyout); 1155 hashbytes += mark; 1156 } 1157 bytes++; 1158 if ((c = getc(din)) != '\n' || tcrflag) { 1159 if (ferror(fout)) 1160 goto break2; 1161 (void)putc('\r', fout); 1162 if (c == '\0') { 1163 bytes++; 1164 goto contin2; 1165 } 1166 if (c == EOF) 1167 goto contin2; 1168 } 1169 } 1170 (void)putc(c, fout); 1171 bytes++; 1172 contin2: ; 1173 } 1174 break2: 1175 if (hash && (!progress || filesize < 0)) { 1176 if (bytes < hashbytes) 1177 (void)putc('#', ttyout); 1178 (void)putc('\n', ttyout); 1179 } 1180 if (ferror(din)) { 1181 if (errno != EPIPE) 1182 warn("netin"); 1183 bytes = -1; 1184 } 1185 if (ferror(fout)) 1186 warn("local: %s", local); 1187 break; 1188 } 1189 1190 progressmeter(1); 1191 if (closefunc != NULL) { 1192 (*closefunc)(fout); 1193 fout = NULL; 1194 } 1195 (void)fclose(din); 1196 din = NULL; 1197 (void)getreply(0); 1198 if (bare_lfs) { 1199 fprintf(ttyout, 1200 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1201 bare_lfs); 1202 fputs("File may not have transferred correctly.\n", ttyout); 1203 } 1204 if (bytes >= 0 && is_retr) { 1205 if (bytes > 0) 1206 ptransfer(0); 1207 if (preserve && (closefunc == fclose)) { 1208 mtime = remotemodtime(remote, 0); 1209 if (mtime != -1) { 1210 (void)gettimeofday(&tval[0], NULL); 1211 tval[1].tv_sec = mtime; 1212 tval[1].tv_usec = 0; 1213 if (utimes(local, tval) == -1) { 1214 fprintf(ttyout, 1215 "Can't change modification time on %s to %s", 1216 local, asctime(localtime(&mtime))); 1217 } 1218 } 1219 } 1220 } 1221 goto cleanuprecv; 1222 1223 abort: 1224 /* 1225 * abort using RFC 959 recommended IP,SYNC sequence 1226 */ 1227 if (! sigsetjmp(xferabort, 1)) { 1228 /* this is the first call */ 1229 (void)xsignal(SIGINT, abort_squared); 1230 if (!cpend) { 1231 code = -1; 1232 goto cleanuprecv; 1233 } 1234 abort_remote(din); 1235 } 1236 code = -1; 1237 if (bytes > 0) 1238 ptransfer(0); 1239 1240 cleanuprecv: 1241 if (oldintr) 1242 (void)xsignal(SIGINT, oldintr); 1243 if (oldintp) 1244 (void)xsignal(SIGPIPE, oldintp); 1245 if (data >= 0) { 1246 (void)close(data); 1247 data = -1; 1248 } 1249 if (closefunc != NULL && fout != NULL) 1250 (*closefunc)(fout); 1251 if (din) 1252 (void)fclose(din); 1253 progress = oprogress; 1254 preserve = opreserve; 1255 bytes = 0; 1256} 1257 1258/* 1259 * Need to start a listen on the data channel before we send the command, 1260 * otherwise the server's connect may fail. 1261 */ 1262int 1263initconn(void) 1264{ 1265 char *p, *a; 1266 int result, tmpno = 0; 1267 int on = 1; 1268 int error; 1269 u_int addr[16], port[2]; 1270 u_int af, hal, pal; 1271 socklen_t len; 1272 char *pasvcmd = NULL; 1273 1274#ifdef INET6 1275 if (myctladdr.su_family == AF_INET6 && debug && 1276 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1277 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1278 warnx("use of scoped address can be troublesome"); 1279 } 1280#endif 1281 reinit: 1282 if (passivemode) { 1283 data_addr = myctladdr; 1284 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1285 if (data < 0) { 1286 warn("socket"); 1287 return (1); 1288 } 1289 if ((options & SO_DEBUG) && 1290 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1291 (void *)&on, sizeof(on)) == -1) { 1292 if (debug) 1293 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1294 } 1295 result = COMPLETE + 1; 1296 switch (data_addr.su_family) { 1297 case AF_INET: 1298 if (epsv4 && !epsv4bad) { 1299 pasvcmd = "EPSV"; 1300 result = command("EPSV"); 1301 if (!connected) 1302 return (1); 1303 /* 1304 * this code is to be friendly with broken 1305 * BSDI ftpd 1306 */ 1307 if (code / 10 == 22 && code != 229) { 1308 fputs( 1309"wrong server: return code must be 229\n", 1310 ttyout); 1311 result = COMPLETE + 1; 1312 } 1313 if (result != COMPLETE) { 1314 epsv4bad = 1; 1315 if (debug) 1316 fputs( 1317 "disabling epsv4 for this connection\n", 1318 ttyout); 1319 } 1320 } 1321 if (result != COMPLETE) { 1322 pasvcmd = "PASV"; 1323 result = command("PASV"); 1324 if (!connected) 1325 return (1); 1326 } 1327 break; 1328#ifdef INET6 1329 case AF_INET6: 1330 pasvcmd = "EPSV"; 1331 result = command("EPSV"); 1332 if (!connected) 1333 return (1); 1334 /* this code is to be friendly with broken BSDI ftpd */ 1335 if (code / 10 == 22 && code != 229) { 1336 fputs( 1337"wrong server: return code must be 229\n", 1338 ttyout); 1339 result = COMPLETE + 1; 1340 } 1341 if (result != COMPLETE) { 1342 pasvcmd = "LPSV"; 1343 result = command("LPSV"); 1344 } 1345 if (!connected) 1346 return (1); 1347 break; 1348#endif 1349 default: 1350 result = COMPLETE + 1; 1351 break; 1352 } 1353 if (result != COMPLETE) { 1354 if (activefallback) { 1355 (void)close(data); 1356 data = -1; 1357 passivemode = 0; 1358#if 0 1359 activefallback = 0; 1360#endif 1361 goto reinit; 1362 } 1363 fputs("Passive mode refused.\n", ttyout); 1364 goto bad; 1365 } 1366 1367#define pack2(var, off) \ 1368 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1369#define pack4(var, off) \ 1370 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1371 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1372#define UC(b) (((int)b)&0xff) 1373 1374 /* 1375 * What we've got at this point is a string of comma separated 1376 * one-byte unsigned integer values, separated by commas. 1377 */ 1378 if (strcmp(pasvcmd, "PASV") == 0) { 1379 if (data_addr.su_family != AF_INET) { 1380 fputs( 1381 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1382 error = 1; 1383 goto bad; 1384 } 1385 if (code / 10 == 22 && code != 227) { 1386 fputs("wrong server: return code must be 227\n", 1387 ttyout); 1388 error = 1; 1389 goto bad; 1390 } 1391 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1392 &addr[0], &addr[1], &addr[2], &addr[3], 1393 &port[0], &port[1]); 1394 if (error != 6) { 1395 fputs( 1396"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1397 error = 1; 1398 goto bad; 1399 } 1400 error = 0; 1401 memset(&data_addr, 0, sizeof(data_addr)); 1402 data_addr.su_family = AF_INET; 1403 data_addr.su_len = sizeof(struct sockaddr_in); 1404 data_addr.si_su.su_sin.sin_addr.s_addr = 1405 htonl(pack4(addr, 0)); 1406 data_addr.su_port = htons(pack2(port, 0)); 1407 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1408 if (code / 10 == 22 && code != 228) { 1409 fputs("wrong server: return code must be 228\n", 1410 ttyout); 1411 error = 1; 1412 goto bad; 1413 } 1414 switch (data_addr.su_family) { 1415 case AF_INET: 1416 error = sscanf(pasv, 1417"%u,%u,%u,%u,%u,%u,%u,%u,%u", 1418 &af, &hal, 1419 &addr[0], &addr[1], &addr[2], &addr[3], 1420 &pal, &port[0], &port[1]); 1421 if (error != 9) { 1422 fputs( 1423"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1424 error = 1; 1425 goto bad; 1426 } 1427 if (af != 4 || hal != 4 || pal != 2) { 1428 fputs( 1429"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1430 error = 1; 1431 goto bad; 1432 } 1433 1434 error = 0; 1435 memset(&data_addr, 0, sizeof(data_addr)); 1436 data_addr.su_family = AF_INET; 1437 data_addr.su_len = sizeof(struct sockaddr_in); 1438 data_addr.si_su.su_sin.sin_addr.s_addr = 1439 htonl(pack4(addr, 0)); 1440 data_addr.su_port = htons(pack2(port, 0)); 1441 break; 1442#ifdef INET6 1443 case AF_INET6: 1444 error = sscanf(pasv, 1445"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1446 &af, &hal, 1447 &addr[0], &addr[1], &addr[2], &addr[3], 1448 &addr[4], &addr[5], &addr[6], &addr[7], 1449 &addr[8], &addr[9], &addr[10], 1450 &addr[11], &addr[12], &addr[13], 1451 &addr[14], &addr[15], 1452 &pal, &port[0], &port[1]); 1453 if (error != 21) { 1454 fputs( 1455"Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1456 error = 1; 1457 goto bad; 1458 } 1459 if (af != 6 || hal != 16 || pal != 2) { 1460 fputs( 1461"Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1462 error = 1; 1463 goto bad; 1464 } 1465 1466 error = 0; 1467 memset(&data_addr, 0, sizeof(data_addr)); 1468 data_addr.su_family = AF_INET6; 1469 data_addr.su_len = sizeof(struct sockaddr_in6); 1470 { 1471 int i; 1472 for (i = 0; i < sizeof(struct in6_addr); i++) { 1473 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1474 UC(addr[i]); 1475 } 1476 } 1477 data_addr.su_port = htons(pack2(port, 0)); 1478 break; 1479#endif 1480 default: 1481 error = 1; 1482 } 1483 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1484 char delim[4]; 1485 1486 port[0] = 0; 1487 if (code / 10 == 22 && code != 229) { 1488 fputs("wrong server: return code must be 229\n", 1489 ttyout); 1490 error = 1; 1491 goto bad; 1492 } 1493 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1494 &delim[1], &delim[2], &port[1], 1495 &delim[3]) != 5) { 1496 fputs("parse error!\n", ttyout); 1497 error = 1; 1498 goto bad; 1499 } 1500 if (delim[0] != delim[1] || delim[0] != delim[2] 1501 || delim[0] != delim[3]) { 1502 fputs("parse error!\n", ttyout); 1503 error = 1; 1504 goto bad; 1505 } 1506 data_addr = hisctladdr; 1507 data_addr.su_port = htons(port[1]); 1508 } else 1509 goto bad; 1510 1511 while (xconnect(data, (struct sockaddr *)&data_addr.si_su, 1512 data_addr.su_len) < 0) { 1513 if (activefallback) { 1514 (void)close(data); 1515 data = -1; 1516 passivemode = 0; 1517#if 0 1518 activefallback = 0; 1519#endif 1520 goto reinit; 1521 } 1522 warn("connect for data channel"); 1523 goto bad; 1524 } 1525#ifdef IPTOS_THROUGHPUT 1526 if (data_addr.su_family == AF_INET) { 1527 on = IPTOS_THROUGHPUT; 1528 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1529 (void *)&on, sizeof(on)) == -1) { 1530 if (debug) 1531 warn("setsockopt %s (ignored)", 1532 "IPTOS_THROUGHPUT"); 1533 } 1534 } 1535#endif 1536 return (0); 1537 } 1538 1539 noport: 1540 data_addr = myctladdr; 1541 if (sendport) 1542 data_addr.su_port = 0; /* let system pick one */ 1543 if (data != -1) 1544 (void)close(data); 1545 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1546 if (data < 0) { 1547 warn("socket"); 1548 if (tmpno) 1549 sendport = 1; 1550 return (1); 1551 } 1552 if (!sendport) 1553 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1554 (void *)&on, sizeof(on)) == -1) { 1555 warn("setsockopt %s", "SO_REUSEADDR"); 1556 goto bad; 1557 } 1558 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1559 data_addr.su_len) < 0) { 1560 warn("bind"); 1561 goto bad; 1562 } 1563 if ((options & SO_DEBUG) && 1564 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1565 (void *)&on, sizeof(on)) == -1) { 1566 if (debug) 1567 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1568 } 1569 len = sizeof(data_addr.si_su); 1570 memset((char *)&data_addr, 0, sizeof (data_addr)); 1571 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1572 warn("getsockname"); 1573 goto bad; 1574 } 1575 data_addr.su_len = len; 1576 if (xlisten(data, 1) < 0) 1577 warn("listen"); 1578 1579 if (sendport) { 1580 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1581 int af; 1582 struct sockinet tmp; 1583 1584 switch (data_addr.su_family) { 1585 case AF_INET: 1586 if (!epsv4 || epsv4bad) { 1587 result = COMPLETE + 1; 1588 break; 1589 } 1590 /* FALLTHROUGH */ 1591#ifdef INET6 1592 case AF_INET6: 1593#endif 1594 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1595 tmp = data_addr; 1596#ifdef INET6 1597 if (tmp.su_family == AF_INET6) 1598 tmp.si_su.su_sin6.sin6_scope_id = 0; 1599#endif 1600 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1601 tmp.su_len, hname, sizeof(hname), sname, 1602 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1603 result = ERROR; 1604 } else { 1605 result = command("EPRT |%d|%s|%s|", af, hname, 1606 sname); 1607 if (!connected) 1608 return (1); 1609 if (result != COMPLETE) { 1610 epsv4bad = 1; 1611 if (debug) 1612 fputs( 1613 "disabling epsv4 for this connection\n", 1614 ttyout); 1615 } 1616 } 1617 break; 1618 default: 1619 result = COMPLETE + 1; 1620 break; 1621 } 1622 if (result == COMPLETE) 1623 goto skip_port; 1624 1625 switch (data_addr.su_family) { 1626 case AF_INET: 1627 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1628 p = (char *)&data_addr.su_port; 1629 result = command("PORT %d,%d,%d,%d,%d,%d", 1630 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1631 UC(p[0]), UC(p[1])); 1632 break; 1633#ifdef INET6 1634 case AF_INET6: 1635 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1636 p = (char *)&data_addr.su_port; 1637 result = command( 1638 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1639 6, 16, 1640 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1641 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1642 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1643 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1644 2, UC(p[0]), UC(p[1])); 1645 break; 1646#endif 1647 default: 1648 result = COMPLETE + 1; /* xxx */ 1649 } 1650 if (!connected) 1651 return (1); 1652 skip_port: 1653 1654 if (result == ERROR && sendport == -1) { 1655 sendport = 0; 1656 tmpno = 1; 1657 goto noport; 1658 } 1659 return (result != COMPLETE); 1660 } 1661 if (tmpno) 1662 sendport = 1; 1663#ifdef IPTOS_THROUGHPUT 1664 if (data_addr.su_family == AF_INET) { 1665 on = IPTOS_THROUGHPUT; 1666 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1667 (void *)&on, sizeof(on)) == -1) 1668 if (debug) 1669 warn("setsockopt %s (ignored)", 1670 "IPTOS_THROUGHPUT"); 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 1682FILE * 1683dataconn(const char *lmode) 1684{ 1685 struct sockinet from; 1686 int s, flags, rv, timeout; 1687 struct timeval endtime, now, td; 1688 struct pollfd pfd[1]; 1689 socklen_t fromlen; 1690 1691 if (passivemode) /* passive data connection */ 1692 return (fdopen(data, lmode)); 1693 1694 /* active mode data connection */ 1695 1696 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1697 goto dataconn_failed; /* get current socket flags */ 1698 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1699 goto dataconn_failed; /* set non-blocking connect */ 1700 1701 /* NOTE: we now must restore socket flags on successful exit */ 1702 1703 /* limit time waiting on listening socket */ 1704 pfd[0].fd = data; 1705 pfd[0].events = POLLIN; 1706 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1707 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1708 /* without -q, default to 60s */ 1709 do { 1710 (void)gettimeofday(&now, NULL); 1711 timersub(&endtime, &now, &td); 1712 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1713 if (timeout < 0) 1714 timeout = 0; 1715 rv = xpoll(pfd, 1, timeout); 1716 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1717 if (rv == -1) { 1718 warn("poll waiting before accept"); 1719 goto dataconn_failed; 1720 } 1721 if (rv == 0) { 1722 warn("poll timeout waiting before accept"); 1723 goto dataconn_failed; 1724 } 1725 1726 /* (non-blocking) accept the connection */ 1727 fromlen = myctladdr.su_len; 1728 do { 1729 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1730 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1731 if (s == -1) { 1732 warn("accept"); 1733 goto dataconn_failed; 1734 } 1735 1736 (void)close(data); 1737 data = s; 1738 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1739 goto dataconn_failed; 1740 1741#ifdef IPTOS_THROUGHPUT 1742 if (from.su_family == AF_INET) { 1743 int tos = IPTOS_THROUGHPUT; 1744 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1745 (void *)&tos, sizeof(tos)) == -1) { 1746 if (debug) 1747 warn("setsockopt %s (ignored)", 1748 "IPTOS_THROUGHPUT"); 1749 } 1750 } 1751#endif 1752 return (fdopen(data, lmode)); 1753 1754 dataconn_failed: 1755 (void)close(data); 1756 data = -1; 1757 return (NULL); 1758} 1759 1760void 1761psabort(int notused) 1762{ 1763 int oerrno = errno; 1764 1765 sigint_raised = 1; 1766 alarmtimer(0); 1767 abrtflag++; 1768 errno = oerrno; 1769} 1770 1771void 1772pswitch(int flag) 1773{ 1774 sigfunc oldintr; 1775 static struct comvars { 1776 int connect; 1777 char name[MAXHOSTNAMELEN]; 1778 struct sockinet mctl; 1779 struct sockinet hctl; 1780 FILE *in; 1781 FILE *out; 1782 int tpe; 1783 int curtpe; 1784 int cpnd; 1785 int sunqe; 1786 int runqe; 1787 int mcse; 1788 int ntflg; 1789 char nti[17]; 1790 char nto[17]; 1791 int mapflg; 1792 char mi[MAXPATHLEN]; 1793 char mo[MAXPATHLEN]; 1794 } proxstruct, tmpstruct; 1795 struct comvars *ip, *op; 1796 1797 abrtflag = 0; 1798 oldintr = xsignal(SIGINT, psabort); 1799 if (flag) { 1800 if (proxy) 1801 return; 1802 ip = &tmpstruct; 1803 op = &proxstruct; 1804 proxy++; 1805 } else { 1806 if (!proxy) 1807 return; 1808 ip = &proxstruct; 1809 op = &tmpstruct; 1810 proxy = 0; 1811 } 1812 ip->connect = connected; 1813 connected = op->connect; 1814 if (hostname) 1815 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1816 else 1817 ip->name[0] = '\0'; 1818 hostname = op->name; 1819 ip->hctl = hisctladdr; 1820 hisctladdr = op->hctl; 1821 ip->mctl = myctladdr; 1822 myctladdr = op->mctl; 1823 ip->in = cin; 1824 cin = op->in; 1825 ip->out = cout; 1826 cout = op->out; 1827 ip->tpe = type; 1828 type = op->tpe; 1829 ip->curtpe = curtype; 1830 curtype = op->curtpe; 1831 ip->cpnd = cpend; 1832 cpend = op->cpnd; 1833 ip->sunqe = sunique; 1834 sunique = op->sunqe; 1835 ip->runqe = runique; 1836 runique = op->runqe; 1837 ip->mcse = mcase; 1838 mcase = op->mcse; 1839 ip->ntflg = ntflag; 1840 ntflag = op->ntflg; 1841 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1842 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1843 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1844 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1845 ip->mapflg = mapflag; 1846 mapflag = op->mapflg; 1847 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1848 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1849 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1850 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1851 (void)xsignal(SIGINT, oldintr); 1852 if (abrtflag) { 1853 abrtflag = 0; 1854 (*oldintr)(SIGINT); 1855 } 1856} 1857 1858void 1859abortpt(int notused) 1860{ 1861 1862 sigint_raised = 1; 1863 alarmtimer(0); 1864 if (fromatty) 1865 write(fileno(ttyout), "\n", 1); 1866 ptabflg++; 1867 mflag = 0; 1868 abrtflag = 0; 1869 siglongjmp(ptabort, 1); 1870} 1871 1872void 1873proxtrans(const char *cmd, const char *local, const char *remote) 1874{ 1875 sigfunc oldintr; 1876 int prox_type, nfnd; 1877 volatile int secndflag; 1878 char *cmd2; 1879 1880#ifdef __GNUC__ /* to shut up gcc warnings */ 1881 (void)&oldintr; 1882 (void)&cmd2; 1883#endif 1884 1885 oldintr = NULL; 1886 secndflag = 0; 1887 if (strcmp(cmd, "RETR")) 1888 cmd2 = "RETR"; 1889 else 1890 cmd2 = runique ? "STOU" : "STOR"; 1891 if ((prox_type = type) == 0) { 1892 if (unix_server && unix_proxy) 1893 prox_type = TYPE_I; 1894 else 1895 prox_type = TYPE_A; 1896 } 1897 if (curtype != prox_type) 1898 changetype(prox_type, 1); 1899 if (command("PASV") != COMPLETE) { 1900 fputs("proxy server does not support third party transfers.\n", 1901 ttyout); 1902 return; 1903 } 1904 pswitch(0); 1905 if (!connected) { 1906 fputs("No primary connection.\n", ttyout); 1907 pswitch(1); 1908 code = -1; 1909 return; 1910 } 1911 if (curtype != prox_type) 1912 changetype(prox_type, 1); 1913 if (command("PORT %s", pasv) != COMPLETE) { 1914 pswitch(1); 1915 return; 1916 } 1917 if (sigsetjmp(ptabort, 1)) 1918 goto abort; 1919 oldintr = xsignal(SIGINT, abortpt); 1920 if ((restart_point && 1921 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1922 || (command("%s %s", cmd, remote) != PRELIM)) { 1923 (void)xsignal(SIGINT, oldintr); 1924 pswitch(1); 1925 return; 1926 } 1927 sleep(2); 1928 pswitch(1); 1929 secndflag++; 1930 if ((restart_point && 1931 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1932 || (command("%s %s", cmd2, local) != PRELIM)) 1933 goto abort; 1934 ptflag++; 1935 (void)getreply(0); 1936 pswitch(0); 1937 (void)getreply(0); 1938 (void)xsignal(SIGINT, oldintr); 1939 pswitch(1); 1940 ptflag = 0; 1941 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1942 return; 1943 abort: 1944 if (sigsetjmp(xferabort, 1)) { 1945 (void)xsignal(SIGINT, oldintr); 1946 return; 1947 } 1948 (void)xsignal(SIGINT, abort_squared); 1949 ptflag = 0; 1950 if (strcmp(cmd, "RETR") && !proxy) 1951 pswitch(1); 1952 else if (!strcmp(cmd, "RETR") && proxy) 1953 pswitch(0); 1954 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1955 if (command("%s %s", cmd2, local) != PRELIM) { 1956 pswitch(0); 1957 if (cpend) 1958 abort_remote(NULL); 1959 } 1960 pswitch(1); 1961 if (ptabflg) 1962 code = -1; 1963 (void)xsignal(SIGINT, oldintr); 1964 return; 1965 } 1966 if (cpend) 1967 abort_remote(NULL); 1968 pswitch(!proxy); 1969 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1970 if (command("%s %s", cmd2, local) != PRELIM) { 1971 pswitch(0); 1972 if (cpend) 1973 abort_remote(NULL); 1974 pswitch(1); 1975 if (ptabflg) 1976 code = -1; 1977 (void)xsignal(SIGINT, oldintr); 1978 return; 1979 } 1980 } 1981 if (cpend) 1982 abort_remote(NULL); 1983 pswitch(!proxy); 1984 if (cpend) { 1985 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1986 if (nfnd < 0) 1987 warn("abort"); 1988 if (ptabflg) 1989 code = -1; 1990 lostpeer(0); 1991 } 1992 (void)getreply(0); 1993 (void)getreply(0); 1994 } 1995 if (proxy) 1996 pswitch(0); 1997 pswitch(1); 1998 if (ptabflg) 1999 code = -1; 2000 (void)xsignal(SIGINT, oldintr); 2001} 2002 2003void 2004reset(int argc, char *argv[]) 2005{ 2006 int nfnd = 1; 2007 2008 if (argc == 0 && argv != NULL) { 2009 fprintf(ttyout, "usage: %s\n", argv[0]); 2010 code = -1; 2011 return; 2012 } 2013 while (nfnd > 0) { 2014 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2015 warn("reset"); 2016 code = -1; 2017 lostpeer(0); 2018 } else if (nfnd) 2019 (void)getreply(0); 2020 } 2021} 2022 2023char * 2024gunique(const char *local) 2025{ 2026 static char new[MAXPATHLEN]; 2027 char *cp = strrchr(local, '/'); 2028 int d, count=0, len; 2029 char ext = '1'; 2030 2031 if (cp) 2032 *cp = '\0'; 2033 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2034 if (cp) 2035 *cp = '/'; 2036 if (d < 0) { 2037 warn("local: %s", local); 2038 return (NULL); 2039 } 2040 len = strlcpy(new, local, sizeof(new)); 2041 cp = &new[len]; 2042 *cp++ = '.'; 2043 while (!d) { 2044 if (++count == 100) { 2045 fputs("runique: can't find unique file name.\n", 2046 ttyout); 2047 return (NULL); 2048 } 2049 *cp++ = ext; 2050 *cp = '\0'; 2051 if (ext == '9') 2052 ext = '0'; 2053 else 2054 ext++; 2055 if ((d = access(new, F_OK)) < 0) 2056 break; 2057 if (ext != '0') 2058 cp--; 2059 else if (*(cp - 2) == '.') 2060 *(cp - 1) = '1'; 2061 else { 2062 *(cp - 2) = *(cp - 2) + 1; 2063 cp--; 2064 } 2065 } 2066 return (new); 2067} 2068 2069/* 2070 * abort_squared -- 2071 * aborts abort_remote(). lostpeer() is called because if the user is 2072 * too impatient to wait or there's another problem then ftp really 2073 * needs to get back to a known state. 2074 */ 2075void 2076abort_squared(int dummy) 2077{ 2078 char msgbuf[100]; 2079 size_t len; 2080 2081 sigint_raised = 1; 2082 alarmtimer(0); 2083 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2084 sizeof(msgbuf)); 2085 write(fileno(ttyout), msgbuf, len); 2086 lostpeer(0); 2087 siglongjmp(xferabort, 1); 2088} 2089 2090void 2091abort_remote(FILE *din) 2092{ 2093 char buf[BUFSIZ]; 2094 int nfnd; 2095 2096 if (cout == NULL) { 2097 warnx("Lost control connection for abort."); 2098 if (ptabflg) 2099 code = -1; 2100 lostpeer(0); 2101 return; 2102 } 2103 /* 2104 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2105 * after urgent byte rather than before as is protocol now 2106 */ 2107 buf[0] = IAC; 2108 buf[1] = IP; 2109 buf[2] = IAC; 2110 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2111 warn("abort"); 2112 fprintf(cout, "%cABOR\r\n", DM); 2113 (void)fflush(cout); 2114 if ((nfnd = empty(cin, din, 10)) <= 0) { 2115 if (nfnd < 0) 2116 warn("abort"); 2117 if (ptabflg) 2118 code = -1; 2119 lostpeer(0); 2120 } 2121 if (din && (nfnd & 2)) { 2122 while (read(fileno(din), buf, BUFSIZ) > 0) 2123 continue; 2124 } 2125 if (getreply(0) == ERROR && code == 552) { 2126 /* 552 needed for nic style abort */ 2127 (void)getreply(0); 2128 } 2129 (void)getreply(0); 2130} 2131 2132void 2133ai_unmapped(struct addrinfo *ai) 2134{ 2135#ifdef INET6 2136 struct sockaddr_in6 *sin6; 2137 struct sockaddr_in sin; 2138 socklen_t len; 2139 2140 if (ai->ai_family != AF_INET6) 2141 return; 2142 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2143 sizeof(sin) > ai->ai_addrlen) 2144 return; 2145 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2146 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2147 return; 2148 2149 memset(&sin, 0, sizeof(sin)); 2150 sin.sin_family = AF_INET; 2151 len = sizeof(struct sockaddr_in); 2152 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2153 sizeof(sin.sin_addr)); 2154 sin.sin_port = sin6->sin6_port; 2155 2156 ai->ai_family = AF_INET; 2157#if HAVE_SOCKADDR_SA_LEN 2158 sin.sin_len = len; 2159#endif 2160 memcpy(ai->ai_addr, &sin, len); 2161 ai->ai_addrlen = len; 2162#endif 2163} 2164