1 /* $NetBSD: ftp.c,v 1.134 2005/06/10 00:18:46 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 1.134 2005/06/10 00:18:46 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, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 char *cause = "unknown"; 172 socklen_t len; 173 int on = 1; 174 175 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 176 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 177 memset(&hints, 0, sizeof(hints)); 178 portnum = parseport(port, FTP_PORT); 179 hints.ai_flags = AI_CANONNAME; 180 hints.ai_family = family; 181 hints.ai_socktype = SOCK_STREAM; 182 hints.ai_protocol = 0; 183 error = getaddrinfo(host, NULL, &hints, &res0); 184 if (error) { 185 warnx("%s: %s", host, gai_strerror(error)); 186 code = -1; 187 return (0); 188 } 189 190 if (res0->ai_canonname) 191 (void)strlcpy(hostnamebuf, res0->ai_canonname, 192 sizeof(hostnamebuf)); 193 else 194 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 195 hostname = hostnamebuf; 196 197 for (res = res0; res; res = res->ai_next) { 198 /* 199 * make sure that ai_addr is NOT an IPv4 mapped address. 200 * IPv4 mapped address complicates too many things in FTP 201 * protocol handling, as FTP protocol is defined differently 202 * between IPv4 and IPv6. 203 * 204 * This may not be the best way to handle this situation, 205 * since the semantics of IPv4 mapped address is defined in 206 * the kernel. There are configurations where we should use 207 * IPv4 mapped address as native IPv6 address, not as 208 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 209 * 210 * More complete solution would be to have an additional 211 * getsockopt to grab "real" peername/sockname. "real" 212 * peername/sockname will be AF_INET if IPv4 mapped address 213 * is used to embed IPv4 address, and will be AF_INET6 if 214 * we use it as native. What a mess! 215 */ 216 ai_unmapped(res); 217 if (verbose && res0->ai_next) { 218 /* if we have multiple possibilities */ 219 if (getnameinfo(res->ai_addr, res->ai_addrlen, 220 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 221 strlcpy(hbuf, "?", sizeof(hbuf)); 222 fprintf(ttyout, "Trying %s...\n", hbuf); 223 } 224 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 225 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 226 if (s < 0) { 227 cause = "socket"; 228 continue; 229 } 230 error = xconnect(s, res->ai_addr, res->ai_addrlen); 231 if (error) { 232 /* this "if" clause is to prevent print warning twice */ 233 if (res->ai_next) { 234 if (getnameinfo(res->ai_addr, res->ai_addrlen, 235 hbuf, sizeof(hbuf), NULL, 0, 236 NI_NUMERICHOST)) 237 strlcpy(hbuf, "?", sizeof(hbuf)); 238 warn("connect to address %s", hbuf); 239 } 240 cause = "connect"; 241 close(s); 242 s = -1; 243 continue; 244 } 245 246 /* finally we got one */ 247 break; 248 } 249 if (s < 0) { 250 warn("%s", cause); 251 code = -1; 252 freeaddrinfo(res0); 253 return 0; 254 } 255 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 256 hisctladdr.su_len = res->ai_addrlen; 257 freeaddrinfo(res0); 258 res0 = res = NULL; 259 260 len = hisctladdr.su_len; 261 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 262 warn("getsockname"); 263 code = -1; 264 goto bad; 265 } 266 myctladdr.su_len = len; 267 268 #ifdef IPTOS_LOWDELAY 269 if (hisctladdr.su_family == AF_INET) { 270 int tos = IPTOS_LOWDELAY; 271 if (setsockopt(s, IPPROTO_IP, IP_TOS, 272 (void *)&tos, sizeof(tos)) == -1) { 273 if (debug) 274 warn("setsockopt %s (ignored)", 275 "IPTOS_LOWDELAY"); 276 } 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 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 302 (void *)&on, sizeof(on)) == -1) { 303 if (debug) 304 warn("setsockopt %s (ignored)", "SO_OOBINLINE"); 305 } 306 307 return (hostname); 308 bad: 309 (void)close(s); 310 return (NULL); 311 } 312 313 void 314 cmdabort(int notused) 315 { 316 int oerrno = errno; 317 318 sigint_raised = 1; 319 alarmtimer(0); 320 if (fromatty) 321 write(fileno(ttyout), "\n", 1); 322 abrtflag++; 323 if (ptflag) 324 siglongjmp(ptabort, 1); 325 errno = oerrno; 326 } 327 328 void 329 cmdtimeout(int notused) 330 { 331 int oerrno = errno; 332 333 alarmtimer(0); 334 if (fromatty) 335 write(fileno(ttyout), "\n", 1); 336 timeoutflag++; 337 if (ptflag) 338 siglongjmp(ptabort, 1); 339 errno = oerrno; 340 } 341 342 /*VARARGS*/ 343 int 344 command(const char *fmt, ...) 345 { 346 va_list ap; 347 int r; 348 sigfunc oldsigint; 349 350 if (debug) { 351 fputs("---> ", ttyout); 352 va_start(ap, fmt); 353 if (strncmp("PASS ", fmt, 5) == 0) 354 fputs("PASS XXXX", ttyout); 355 else if (strncmp("ACCT ", fmt, 5) == 0) 356 fputs("ACCT XXXX", ttyout); 357 else 358 vfprintf(ttyout, fmt, ap); 359 va_end(ap); 360 putc('\n', ttyout); 361 } 362 if (cout == NULL) { 363 warnx("No control connection for command."); 364 code = -1; 365 return (0); 366 } 367 368 abrtflag = 0; 369 370 oldsigint = xsignal(SIGINT, cmdabort); 371 372 va_start(ap, fmt); 373 vfprintf(cout, fmt, ap); 374 va_end(ap); 375 fputs("\r\n", cout); 376 (void)fflush(cout); 377 cpend = 1; 378 r = getreply(!strcmp(fmt, "QUIT")); 379 if (abrtflag && oldsigint != SIG_IGN) 380 (*oldsigint)(SIGINT); 381 (void)xsignal(SIGINT, oldsigint); 382 return (r); 383 } 384 385 int 386 getreply(int expecteof) 387 { 388 char current_line[BUFSIZ]; /* last line of previous reply */ 389 int c, n, line; 390 int dig; 391 int originalcode = 0, continuation = 0; 392 sigfunc oldsigint, oldsigalrm; 393 int pflag = 0; 394 char *cp, *pt = pasv; 395 396 abrtflag = 0; 397 timeoutflag = 0; 398 399 oldsigint = xsignal(SIGINT, cmdabort); 400 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 401 402 for (line = 0 ;; line++) { 403 dig = n = code = 0; 404 cp = current_line; 405 while (alarmtimer(60),((c = getc(cin)) != '\n')) { 406 if (c == IAC) { /* handle telnet commands */ 407 switch (c = getc(cin)) { 408 case WILL: 409 case WONT: 410 c = getc(cin); 411 fprintf(cout, "%c%c%c", IAC, DONT, c); 412 (void)fflush(cout); 413 break; 414 case DO: 415 case DONT: 416 c = getc(cin); 417 fprintf(cout, "%c%c%c", IAC, WONT, c); 418 (void)fflush(cout); 419 break; 420 default: 421 break; 422 } 423 continue; 424 } 425 dig++; 426 if (c == EOF) { 427 /* 428 * these will get trashed by pswitch() 429 * in lostpeer() 430 */ 431 int reply_timeoutflag = timeoutflag; 432 int reply_abrtflag = abrtflag; 433 434 alarmtimer(0); 435 if (expecteof && feof(cin)) { 436 (void)xsignal(SIGINT, oldsigint); 437 (void)xsignal(SIGALRM, oldsigalrm); 438 code = 221; 439 return (0); 440 } 441 cpend = 0; 442 lostpeer(0); 443 if (verbose) { 444 if (reply_timeoutflag) 445 fputs( 446 "421 Service not available, remote server timed out. Connection closed\n", 447 ttyout); 448 else if (reply_abrtflag) 449 fputs( 450 "421 Service not available, user interrupt. Connection closed.\n", 451 ttyout); 452 else 453 fputs( 454 "421 Service not available, remote server has closed connection.\n", 455 ttyout); 456 (void)fflush(ttyout); 457 } 458 code = 421; 459 (void)xsignal(SIGINT, oldsigint); 460 (void)xsignal(SIGALRM, oldsigalrm); 461 return (4); 462 } 463 if (c != '\r' && (verbose > 0 || 464 ((verbose > -1 && n == '5' && dig > 4) && 465 (((!n && c < '5') || (n && n < '5')) 466 || !retry_connect)))) { 467 if (proxflag && 468 (dig == 1 || (dig == 5 && verbose == 0))) 469 fprintf(ttyout, "%s:", hostname); 470 (void)putc(c, ttyout); 471 } 472 if (dig < 4 && isdigit(c)) 473 code = code * 10 + (c - '0'); 474 if (!pflag && (code == 227 || code == 228)) 475 pflag = 1; 476 else if (!pflag && code == 229) 477 pflag = 100; 478 if (dig > 4 && pflag == 1 && isdigit(c)) 479 pflag = 2; 480 if (pflag == 2) { 481 if (c != '\r' && c != ')') { 482 if (pt < &pasv[sizeof(pasv) - 1]) 483 *pt++ = c; 484 } else { 485 *pt = '\0'; 486 pflag = 3; 487 } 488 } 489 if (pflag == 100 && c == '(') 490 pflag = 2; 491 if (dig == 4 && c == '-') { 492 if (continuation) 493 code = 0; 494 continuation++; 495 } 496 if (n == 0) 497 n = c; 498 if (cp < ¤t_line[sizeof(current_line) - 1]) 499 *cp++ = c; 500 } 501 if (verbose > 0 || ((verbose > -1 && n == '5') && 502 (n < '5' || !retry_connect))) { 503 (void)putc(c, ttyout); 504 (void)fflush (ttyout); 505 } 506 if (cp[-1] == '\r') 507 cp[-1] = '\0'; 508 *cp = '\0'; 509 if (line == 0) 510 (void)strlcpy(reply_string, current_line, 511 sizeof(reply_string)); 512 if (line > 0 && code == 0 && reply_callback != NULL) 513 (*reply_callback)(current_line); 514 if (continuation && code != originalcode) { 515 if (originalcode == 0) 516 originalcode = code; 517 continue; 518 } 519 if (n != '1') 520 cpend = 0; 521 alarmtimer(0); 522 (void)xsignal(SIGINT, oldsigint); 523 (void)xsignal(SIGALRM, oldsigalrm); 524 if (code == 421 || originalcode == 421) 525 lostpeer(0); 526 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 527 (*oldsigint)(SIGINT); 528 if (timeoutflag && oldsigalrm != cmdtimeout && 529 oldsigalrm != SIG_IGN) 530 (*oldsigalrm)(SIGINT); 531 return (n - '0'); 532 } 533 } 534 535 static int 536 empty(FILE *cin, FILE *din, int sec) 537 { 538 int nr, nfd; 539 struct pollfd pfd[2]; 540 541 nfd = 0; 542 if (cin) { 543 pfd[nfd].fd = fileno(cin); 544 pfd[nfd++].events = POLLIN; 545 } 546 547 if (din) { 548 pfd[nfd].fd = fileno(din); 549 pfd[nfd++].events = POLLIN; 550 } 551 552 if ((nr = xpoll(pfd, nfd, sec * 1000)) <= 0) 553 return nr; 554 555 nr = 0; 556 nfd = 0; 557 if (cin) 558 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 559 if (din) 560 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 561 return nr; 562 } 563 564 sigjmp_buf xferabort; 565 566 void 567 abortxfer(int notused) 568 { 569 char msgbuf[100]; 570 size_t len; 571 572 sigint_raised = 1; 573 alarmtimer(0); 574 mflag = 0; 575 abrtflag = 0; 576 switch (direction[0]) { 577 case 'r': 578 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 579 break; 580 case 's': 581 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 582 break; 583 default: 584 errx(1, "abortxfer called with unknown direction `%s'", 585 direction); 586 } 587 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 588 sizeof(msgbuf)); 589 write(fileno(ttyout), msgbuf, len); 590 siglongjmp(xferabort, 1); 591 } 592 593 void 594 sendrequest(const char *cmd, const char *local, const char *remote, 595 int printnames) 596 { 597 struct stat st; 598 int c, d; 599 FILE *fin, *dout; 600 int (*closefunc)(FILE *); 601 sigfunc oldintr, oldintp; 602 volatile off_t hashbytes; 603 char *lmode, *bufp; 604 static size_t bufsize; 605 static char *buf; 606 int oprogress; 607 608 #ifdef __GNUC__ /* to shut up gcc warnings */ 609 (void)&fin; 610 (void)&dout; 611 (void)&closefunc; 612 (void)&oldintr; 613 (void)&oldintp; 614 (void)&lmode; 615 #endif 616 617 hashbytes = mark; 618 direction = "sent"; 619 dout = NULL; 620 bytes = 0; 621 filesize = -1; 622 oprogress = progress; 623 if (verbose && printnames) { 624 if (local && *local != '-') 625 fprintf(ttyout, "local: %s ", local); 626 if (remote) 627 fprintf(ttyout, "remote: %s\n", remote); 628 } 629 if (proxy) { 630 proxtrans(cmd, local, remote); 631 return; 632 } 633 if (curtype != type) 634 changetype(type, 0); 635 closefunc = NULL; 636 oldintr = NULL; 637 oldintp = NULL; 638 lmode = "w"; 639 if (sigsetjmp(xferabort, 1)) { 640 while (cpend) 641 (void)getreply(0); 642 code = -1; 643 goto cleanupsend; 644 } 645 (void)xsignal(SIGQUIT, psummary); 646 oldintr = xsignal(SIGINT, abortxfer); 647 if (strcmp(local, "-") == 0) { 648 fin = stdin; 649 progress = 0; 650 } else if (*local == '|') { 651 oldintp = xsignal(SIGPIPE, SIG_IGN); 652 fin = popen(local + 1, "r"); 653 if (fin == NULL) { 654 warn("%s", local + 1); 655 code = -1; 656 goto cleanupsend; 657 } 658 progress = 0; 659 closefunc = pclose; 660 } else { 661 fin = fopen(local, "r"); 662 if (fin == NULL) { 663 warn("local: %s", local); 664 code = -1; 665 goto cleanupsend; 666 } 667 closefunc = fclose; 668 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 669 fprintf(ttyout, "%s: not a plain file.\n", local); 670 code = -1; 671 goto cleanupsend; 672 } 673 filesize = st.st_size; 674 } 675 if (initconn()) { 676 code = -1; 677 goto cleanupsend; 678 } 679 if (sigsetjmp(xferabort, 1)) 680 goto abort; 681 682 if (restart_point && 683 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 684 int rc; 685 686 rc = -1; 687 switch (curtype) { 688 case TYPE_A: 689 rc = fseeko(fin, restart_point, SEEK_SET); 690 break; 691 case TYPE_I: 692 case TYPE_L: 693 rc = lseek(fileno(fin), restart_point, SEEK_SET); 694 break; 695 } 696 if (rc < 0) { 697 warn("local: %s", local); 698 goto cleanupsend; 699 } 700 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 701 goto cleanupsend; 702 lmode = "r+"; 703 } 704 if (remote) { 705 if (command("%s %s", cmd, remote) != PRELIM) 706 goto cleanupsend; 707 } else { 708 if (command("%s", cmd) != PRELIM) 709 goto cleanupsend; 710 } 711 dirchange = 1; 712 dout = dataconn(lmode); 713 if (dout == NULL) 714 goto abort; 715 716 if (sndbuf_size > bufsize) { 717 if (buf) 718 (void)free(buf); 719 bufsize = sndbuf_size; 720 buf = xmalloc(bufsize); 721 } 722 723 progressmeter(-1); 724 oldintp = xsignal(SIGPIPE, SIG_IGN); 725 726 switch (curtype) { 727 728 case TYPE_I: 729 case TYPE_L: 730 if (rate_put) { /* rate limited */ 731 while (1) { 732 struct timeval then, now, td; 733 off_t bufrem; 734 735 (void)gettimeofday(&then, NULL); 736 errno = c = d = 0; 737 bufrem = rate_put; 738 while (bufrem > 0) { 739 if ((c = read(fileno(fin), buf, 740 MIN(bufsize, bufrem))) <= 0) 741 goto senddone; 742 bytes += c; 743 bufrem -= c; 744 for (bufp = buf; c > 0; 745 c -= d, bufp += d) 746 if ((d = write(fileno(dout), 747 bufp, c)) <= 0) 748 break; 749 if (d < 0) 750 goto senddone; 751 if (hash && 752 (!progress || filesize < 0) ) { 753 while (bytes >= hashbytes) { 754 (void)putc('#', ttyout); 755 hashbytes += mark; 756 } 757 (void)fflush(ttyout); 758 } 759 } 760 while (1) { 761 (void)gettimeofday(&now, NULL); 762 timersub(&now, &then, &td); 763 if (td.tv_sec > 0) 764 break; 765 usleep(1000000 - td.tv_usec); 766 } 767 } 768 } else { /* simpler/faster; no rate limit */ 769 while (1) { 770 errno = c = d = 0; 771 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 772 goto senddone; 773 bytes += c; 774 for (bufp = buf; c > 0; c -= d, bufp += d) 775 if ((d = write(fileno(dout), bufp, c)) 776 <= 0) 777 break; 778 if (d < 0) 779 goto senddone; 780 if (hash && (!progress || filesize < 0) ) { 781 while (bytes >= hashbytes) { 782 (void)putc('#', ttyout); 783 hashbytes += mark; 784 } 785 (void)fflush(ttyout); 786 } 787 } 788 } 789 senddone: 790 if (hash && (!progress || filesize < 0) && bytes > 0) { 791 if (bytes < mark) 792 (void)putc('#', ttyout); 793 (void)putc('\n', ttyout); 794 } 795 if (c < 0) 796 warn("local: %s", local); 797 if (d < 0) { 798 if (errno != EPIPE) 799 warn("netout"); 800 bytes = -1; 801 } 802 break; 803 804 case TYPE_A: 805 while ((c = getc(fin)) != EOF) { 806 if (c == '\n') { 807 while (hash && (!progress || filesize < 0) && 808 (bytes >= hashbytes)) { 809 (void)putc('#', ttyout); 810 (void)fflush(ttyout); 811 hashbytes += mark; 812 } 813 if (ferror(dout)) 814 break; 815 (void)putc('\r', dout); 816 bytes++; 817 } 818 (void)putc(c, dout); 819 bytes++; 820 #if 0 /* this violates RFC */ 821 if (c == '\r') { 822 (void)putc('\0', dout); 823 bytes++; 824 } 825 #endif 826 } 827 if (hash && (!progress || filesize < 0)) { 828 if (bytes < hashbytes) 829 (void)putc('#', ttyout); 830 (void)putc('\n', ttyout); 831 } 832 if (ferror(fin)) 833 warn("local: %s", local); 834 if (ferror(dout)) { 835 if (errno != EPIPE) 836 warn("netout"); 837 bytes = -1; 838 } 839 break; 840 } 841 842 progressmeter(1); 843 if (closefunc != NULL) { 844 (*closefunc)(fin); 845 fin = NULL; 846 } 847 (void)fclose(dout); 848 dout = NULL; 849 (void)getreply(0); 850 if (bytes > 0) 851 ptransfer(0); 852 goto cleanupsend; 853 854 abort: 855 (void)xsignal(SIGINT, oldintr); 856 oldintr = NULL; 857 if (!cpend) { 858 code = -1; 859 goto cleanupsend; 860 } 861 if (data >= 0) { 862 (void)close(data); 863 data = -1; 864 } 865 if (dout) { 866 (void)fclose(dout); 867 dout = NULL; 868 } 869 (void)getreply(0); 870 code = -1; 871 if (bytes > 0) 872 ptransfer(0); 873 874 cleanupsend: 875 if (oldintr) 876 (void)xsignal(SIGINT, oldintr); 877 if (oldintp) 878 (void)xsignal(SIGPIPE, oldintp); 879 if (data >= 0) { 880 (void)close(data); 881 data = -1; 882 } 883 if (closefunc != NULL && fin != NULL) 884 (*closefunc)(fin); 885 if (dout) 886 (void)fclose(dout); 887 progress = oprogress; 888 restart_point = 0; 889 bytes = 0; 890 } 891 892 void 893 recvrequest(const char *cmd, const char *local, const char *remote, 894 const char *lmode, int printnames, int ignorespecial) 895 { 896 FILE *fout, *din; 897 int (*closefunc)(FILE *); 898 sigfunc oldintr, oldintp; 899 int c, d; 900 volatile int is_retr, tcrflag, bare_lfs; 901 static size_t bufsize; 902 static char *buf; 903 volatile off_t hashbytes; 904 struct stat st; 905 time_t mtime; 906 struct timeval tval[2]; 907 int oprogress; 908 int opreserve; 909 910 #ifdef __GNUC__ /* to shut up gcc warnings */ 911 (void)&local; 912 (void)&fout; 913 (void)&din; 914 (void)&closefunc; 915 (void)&oldintr; 916 (void)&oldintp; 917 #endif 918 919 fout = NULL; 920 din = NULL; 921 hashbytes = mark; 922 direction = "received"; 923 bytes = 0; 924 bare_lfs = 0; 925 filesize = -1; 926 oprogress = progress; 927 opreserve = preserve; 928 is_retr = (strcmp(cmd, "RETR") == 0); 929 if (is_retr && verbose && printnames) { 930 if (local && (ignorespecial || *local != '-')) 931 fprintf(ttyout, "local: %s ", local); 932 if (remote) 933 fprintf(ttyout, "remote: %s\n", remote); 934 } 935 if (proxy && is_retr) { 936 proxtrans(cmd, local, remote); 937 return; 938 } 939 closefunc = NULL; 940 oldintr = NULL; 941 oldintp = NULL; 942 tcrflag = !crflag && is_retr; 943 if (sigsetjmp(xferabort, 1)) { 944 while (cpend) 945 (void)getreply(0); 946 code = -1; 947 goto cleanuprecv; 948 } 949 (void)xsignal(SIGQUIT, psummary); 950 oldintr = xsignal(SIGINT, abortxfer); 951 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 952 if (access(local, W_OK) < 0) { 953 char *dir = strrchr(local, '/'); 954 955 if (errno != ENOENT && errno != EACCES) { 956 warn("local: %s", local); 957 code = -1; 958 goto cleanuprecv; 959 } 960 if (dir != NULL) 961 *dir = 0; 962 d = access(dir == local ? "/" : 963 dir ? local : ".", W_OK); 964 if (dir != NULL) 965 *dir = '/'; 966 if (d < 0) { 967 warn("local: %s", local); 968 code = -1; 969 goto cleanuprecv; 970 } 971 if (!runique && errno == EACCES && 972 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 973 warn("local: %s", local); 974 code = -1; 975 goto cleanuprecv; 976 } 977 if (runique && errno == EACCES && 978 (local = gunique(local)) == NULL) { 979 code = -1; 980 goto cleanuprecv; 981 } 982 } 983 else if (runique && (local = gunique(local)) == NULL) { 984 code = -1; 985 goto cleanuprecv; 986 } 987 } 988 if (!is_retr) { 989 if (curtype != TYPE_A) 990 changetype(TYPE_A, 0); 991 } else { 992 if (curtype != type) 993 changetype(type, 0); 994 filesize = remotesize(remote, 0); 995 if (code == 421 || code == -1) 996 goto cleanuprecv; 997 } 998 if (initconn()) { 999 code = -1; 1000 goto cleanuprecv; 1001 } 1002 if (sigsetjmp(xferabort, 1)) 1003 goto abort; 1004 if (is_retr && restart_point && 1005 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1006 goto cleanuprecv; 1007 if (! EMPTYSTRING(remote)) { 1008 if (command("%s %s", cmd, remote) != PRELIM) 1009 goto cleanuprecv; 1010 } else { 1011 if (command("%s", cmd) != PRELIM) 1012 goto cleanuprecv; 1013 } 1014 din = dataconn("r"); 1015 if (din == NULL) 1016 goto abort; 1017 if (!ignorespecial && strcmp(local, "-") == 0) { 1018 fout = stdout; 1019 progress = 0; 1020 preserve = 0; 1021 } else if (!ignorespecial && *local == '|') { 1022 oldintp = xsignal(SIGPIPE, SIG_IGN); 1023 fout = popen(local + 1, "w"); 1024 if (fout == NULL) { 1025 warn("%s", local+1); 1026 goto abort; 1027 } 1028 progress = 0; 1029 preserve = 0; 1030 closefunc = pclose; 1031 } else { 1032 fout = fopen(local, lmode); 1033 if (fout == NULL) { 1034 warn("local: %s", local); 1035 goto abort; 1036 } 1037 closefunc = fclose; 1038 } 1039 1040 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1041 progress = 0; 1042 preserve = 0; 1043 } 1044 if (rcvbuf_size > bufsize) { 1045 if (buf) 1046 (void)free(buf); 1047 bufsize = rcvbuf_size; 1048 buf = xmalloc(bufsize); 1049 } 1050 1051 progressmeter(-1); 1052 1053 switch (curtype) { 1054 1055 case TYPE_I: 1056 case TYPE_L: 1057 if (is_retr && restart_point && 1058 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1059 warn("local: %s", local); 1060 goto cleanuprecv; 1061 } 1062 if (rate_get) { /* rate limiting */ 1063 while (1) { 1064 struct timeval then, now, td; 1065 off_t bufrem; 1066 1067 (void)gettimeofday(&then, NULL); 1068 errno = c = d = 0; 1069 for (bufrem = rate_get; bufrem > 0; ) { 1070 if ((c = read(fileno(din), buf, 1071 MIN(bufsize, bufrem))) <= 0) 1072 goto recvdone; 1073 bytes += c; 1074 bufrem -=c; 1075 if ((d = write(fileno(fout), buf, c)) 1076 != c) 1077 goto recvdone; 1078 if (hash && 1079 (!progress || filesize < 0)) { 1080 while (bytes >= hashbytes) { 1081 (void)putc('#', ttyout); 1082 hashbytes += mark; 1083 } 1084 (void)fflush(ttyout); 1085 } 1086 } 1087 /* sleep until time is up */ 1088 while (1) { 1089 (void)gettimeofday(&now, NULL); 1090 timersub(&now, &then, &td); 1091 if (td.tv_sec > 0) 1092 break; 1093 usleep(1000000 - td.tv_usec); 1094 } 1095 } 1096 } else { /* faster code (no limiting) */ 1097 while (1) { 1098 errno = c = d = 0; 1099 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1100 goto recvdone; 1101 bytes += c; 1102 if ((d = write(fileno(fout), buf, c)) != c) 1103 goto recvdone; 1104 if (hash && (!progress || filesize < 0)) { 1105 while (bytes >= hashbytes) { 1106 (void)putc('#', ttyout); 1107 hashbytes += mark; 1108 } 1109 (void)fflush(ttyout); 1110 } 1111 } 1112 } 1113 recvdone: 1114 if (hash && (!progress || filesize < 0) && bytes > 0) { 1115 if (bytes < mark) 1116 (void)putc('#', ttyout); 1117 (void)putc('\n', ttyout); 1118 } 1119 if (c < 0) { 1120 if (errno != EPIPE) 1121 warn("netin"); 1122 bytes = -1; 1123 } 1124 if (d < c) { 1125 if (d < 0) 1126 warn("local: %s", local); 1127 else 1128 warnx("%s: short write", local); 1129 } 1130 break; 1131 1132 case TYPE_A: 1133 if (is_retr && restart_point) { 1134 int ch; 1135 off_t i; 1136 1137 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1138 goto done; 1139 for (i = 0; i++ < restart_point;) { 1140 if ((ch = getc(fout)) == EOF) 1141 goto done; 1142 if (ch == '\n') 1143 i++; 1144 } 1145 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1146 done: 1147 warn("local: %s", local); 1148 goto cleanuprecv; 1149 } 1150 } 1151 while ((c = getc(din)) != EOF) { 1152 if (c == '\n') 1153 bare_lfs++; 1154 while (c == '\r') { 1155 while (hash && (!progress || filesize < 0) && 1156 (bytes >= hashbytes)) { 1157 (void)putc('#', ttyout); 1158 (void)fflush(ttyout); 1159 hashbytes += mark; 1160 } 1161 bytes++; 1162 if ((c = getc(din)) != '\n' || tcrflag) { 1163 if (ferror(fout)) 1164 goto break2; 1165 (void)putc('\r', fout); 1166 if (c == '\0') { 1167 bytes++; 1168 goto contin2; 1169 } 1170 if (c == EOF) 1171 goto contin2; 1172 } 1173 } 1174 (void)putc(c, fout); 1175 bytes++; 1176 contin2: ; 1177 } 1178 break2: 1179 if (hash && (!progress || filesize < 0)) { 1180 if (bytes < hashbytes) 1181 (void)putc('#', ttyout); 1182 (void)putc('\n', ttyout); 1183 } 1184 if (ferror(din)) { 1185 if (errno != EPIPE) 1186 warn("netin"); 1187 bytes = -1; 1188 } 1189 if (ferror(fout)) 1190 warn("local: %s", local); 1191 break; 1192 } 1193 1194 progressmeter(1); 1195 if (closefunc != NULL) { 1196 (*closefunc)(fout); 1197 fout = NULL; 1198 } 1199 (void)fclose(din); 1200 din = NULL; 1201 (void)getreply(0); 1202 if (bare_lfs) { 1203 fprintf(ttyout, 1204 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1205 bare_lfs); 1206 fputs("File may not have transferred correctly.\n", ttyout); 1207 } 1208 if (bytes >= 0 && is_retr) { 1209 if (bytes > 0) 1210 ptransfer(0); 1211 if (preserve && (closefunc == fclose)) { 1212 mtime = remotemodtime(remote, 0); 1213 if (mtime != -1) { 1214 (void)gettimeofday(&tval[0], NULL); 1215 tval[1].tv_sec = mtime; 1216 tval[1].tv_usec = 0; 1217 if (utimes(local, tval) == -1) { 1218 fprintf(ttyout, 1219 "Can't change modification time on %s to %s", 1220 local, asctime(localtime(&mtime))); 1221 } 1222 } 1223 } 1224 } 1225 goto cleanuprecv; 1226 1227 abort: 1228 /* 1229 * abort using RFC 959 recommended IP,SYNC sequence 1230 */ 1231 if (! sigsetjmp(xferabort, 1)) { 1232 /* this is the first call */ 1233 (void)xsignal(SIGINT, abort_squared); 1234 if (!cpend) { 1235 code = -1; 1236 goto cleanuprecv; 1237 } 1238 abort_remote(din); 1239 } 1240 code = -1; 1241 if (bytes > 0) 1242 ptransfer(0); 1243 1244 cleanuprecv: 1245 if (oldintr) 1246 (void)xsignal(SIGINT, oldintr); 1247 if (oldintp) 1248 (void)xsignal(SIGPIPE, oldintp); 1249 if (data >= 0) { 1250 (void)close(data); 1251 data = -1; 1252 } 1253 if (closefunc != NULL && fout != NULL) 1254 (*closefunc)(fout); 1255 if (din) 1256 (void)fclose(din); 1257 progress = oprogress; 1258 preserve = opreserve; 1259 bytes = 0; 1260 } 1261 1262 /* 1263 * Need to start a listen on the data channel before we send the command, 1264 * otherwise the server's connect may fail. 1265 */ 1266 int 1267 initconn(void) 1268 { 1269 char *p, *a; 1270 int result, tmpno = 0; 1271 int on = 1; 1272 int error; 1273 unsigned int addr[16], port[2]; 1274 unsigned int af, hal, pal; 1275 socklen_t len; 1276 char *pasvcmd = NULL; 1277 1278 #ifdef INET6 1279 if (myctladdr.su_family == AF_INET6 && debug && 1280 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1281 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1282 warnx("use of scoped address can be troublesome"); 1283 } 1284 #endif 1285 reinit: 1286 if (passivemode) { 1287 data_addr = myctladdr; 1288 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1289 if (data < 0) { 1290 warn("socket"); 1291 return (1); 1292 } 1293 if ((options & SO_DEBUG) && 1294 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1295 (void *)&on, sizeof(on)) == -1) { 1296 if (debug) 1297 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1298 } 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 for data channel"); 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, 1533 (void *)&on, sizeof(on)) == -1) { 1534 if (debug) 1535 warn("setsockopt %s (ignored)", 1536 "IPTOS_THROUGHPUT"); 1537 } 1538 } 1539 #endif 1540 return (0); 1541 } 1542 1543 noport: 1544 data_addr = myctladdr; 1545 if (sendport) 1546 data_addr.su_port = 0; /* let system pick one */ 1547 if (data != -1) 1548 (void)close(data); 1549 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1550 if (data < 0) { 1551 warn("socket"); 1552 if (tmpno) 1553 sendport = 1; 1554 return (1); 1555 } 1556 if (!sendport) 1557 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1558 (void *)&on, sizeof(on)) == -1) { 1559 warn("setsockopt %s", "SO_REUSEADDR"); 1560 goto bad; 1561 } 1562 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1563 data_addr.su_len) < 0) { 1564 warn("bind"); 1565 goto bad; 1566 } 1567 if ((options & SO_DEBUG) && 1568 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1569 (void *)&on, sizeof(on)) == -1) { 1570 if (debug) 1571 warn("setsockopt %s (ignored)", "SO_DEBUG"); 1572 } 1573 len = sizeof(data_addr.si_su); 1574 memset((char *)&data_addr, 0, sizeof (data_addr)); 1575 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1576 warn("getsockname"); 1577 goto bad; 1578 } 1579 data_addr.su_len = len; 1580 if (xlisten(data, 1) < 0) 1581 warn("listen"); 1582 1583 if (sendport) { 1584 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1585 int af; 1586 struct sockinet tmp; 1587 1588 switch (data_addr.su_family) { 1589 case AF_INET: 1590 if (!epsv4 || epsv4bad) { 1591 result = COMPLETE + 1; 1592 break; 1593 } 1594 /* FALLTHROUGH */ 1595 #ifdef INET6 1596 case AF_INET6: 1597 #endif 1598 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1599 tmp = data_addr; 1600 #ifdef INET6 1601 if (tmp.su_family == AF_INET6) 1602 tmp.si_su.su_sin6.sin6_scope_id = 0; 1603 #endif 1604 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1605 tmp.su_len, hname, sizeof(hname), sname, 1606 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1607 result = ERROR; 1608 } else { 1609 result = command("EPRT |%d|%s|%s|", af, hname, 1610 sname); 1611 if (!connected) 1612 return (1); 1613 if (result != COMPLETE) { 1614 epsv4bad = 1; 1615 if (debug) 1616 fputs( 1617 "disabling epsv4 for this connection\n", 1618 ttyout); 1619 } 1620 } 1621 break; 1622 default: 1623 result = COMPLETE + 1; 1624 break; 1625 } 1626 if (result == COMPLETE) 1627 goto skip_port; 1628 1629 switch (data_addr.su_family) { 1630 case AF_INET: 1631 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1632 p = (char *)&data_addr.su_port; 1633 result = command("PORT %d,%d,%d,%d,%d,%d", 1634 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1635 UC(p[0]), UC(p[1])); 1636 break; 1637 #ifdef INET6 1638 case AF_INET6: 1639 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1640 p = (char *)&data_addr.su_port; 1641 result = command( 1642 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1643 6, 16, 1644 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1645 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1646 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1647 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1648 2, UC(p[0]), UC(p[1])); 1649 break; 1650 #endif 1651 default: 1652 result = COMPLETE + 1; /* xxx */ 1653 } 1654 if (!connected) 1655 return (1); 1656 skip_port: 1657 1658 if (result == ERROR && sendport == -1) { 1659 sendport = 0; 1660 tmpno = 1; 1661 goto noport; 1662 } 1663 return (result != COMPLETE); 1664 } 1665 if (tmpno) 1666 sendport = 1; 1667 #ifdef IPTOS_THROUGHPUT 1668 if (data_addr.su_family == AF_INET) { 1669 on = IPTOS_THROUGHPUT; 1670 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1671 (void *)&on, sizeof(on)) == -1) 1672 if (debug) 1673 warn("setsockopt %s (ignored)", 1674 "IPTOS_THROUGHPUT"); 1675 } 1676 #endif 1677 return (0); 1678 bad: 1679 (void)close(data); 1680 data = -1; 1681 if (tmpno) 1682 sendport = 1; 1683 return (1); 1684 } 1685 1686 FILE * 1687 dataconn(const char *lmode) 1688 { 1689 struct sockinet from; 1690 int s, flags, rv, timeout; 1691 struct timeval endtime, now, td; 1692 struct pollfd pfd[1]; 1693 socklen_t fromlen; 1694 1695 if (passivemode) /* passive data connection */ 1696 return (fdopen(data, lmode)); 1697 1698 /* active mode data connection */ 1699 1700 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1701 goto dataconn_failed; /* get current socket flags */ 1702 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1703 goto dataconn_failed; /* set non-blocking connect */ 1704 1705 /* NOTE: we now must restore socket flags on successful exit */ 1706 1707 /* limit time waiting on listening socket */ 1708 pfd[0].fd = data; 1709 pfd[0].events = POLLIN; 1710 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1711 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1712 /* without -q, default to 60s */ 1713 do { 1714 (void)gettimeofday(&now, NULL); 1715 timersub(&endtime, &now, &td); 1716 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1717 if (timeout < 0) 1718 timeout = 0; 1719 rv = xpoll(pfd, 1, timeout); 1720 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1721 if (rv == -1) { 1722 warn("poll waiting before accept"); 1723 goto dataconn_failed; 1724 } 1725 if (rv == 0) { 1726 warn("poll timeout waiting before accept"); 1727 goto dataconn_failed; 1728 } 1729 1730 /* (non-blocking) accept the connection */ 1731 fromlen = myctladdr.su_len; 1732 do { 1733 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1734 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1735 if (s == -1) { 1736 warn("accept"); 1737 goto dataconn_failed; 1738 } 1739 1740 (void)close(data); 1741 data = s; 1742 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1743 goto dataconn_failed; 1744 1745 #ifdef IPTOS_THROUGHPUT 1746 if (from.su_family == AF_INET) { 1747 int tos = IPTOS_THROUGHPUT; 1748 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1749 (void *)&tos, sizeof(tos)) == -1) { 1750 if (debug) 1751 warn("setsockopt %s (ignored)", 1752 "IPTOS_THROUGHPUT"); 1753 } 1754 } 1755 #endif 1756 return (fdopen(data, lmode)); 1757 1758 dataconn_failed: 1759 (void)close(data); 1760 data = -1; 1761 return (NULL); 1762 } 1763 1764 void 1765 psabort(int notused) 1766 { 1767 int oerrno = errno; 1768 1769 sigint_raised = 1; 1770 alarmtimer(0); 1771 abrtflag++; 1772 errno = oerrno; 1773 } 1774 1775 void 1776 pswitch(int flag) 1777 { 1778 sigfunc oldintr; 1779 static struct comvars { 1780 int connect; 1781 char name[MAXHOSTNAMELEN]; 1782 struct sockinet mctl; 1783 struct sockinet hctl; 1784 FILE *in; 1785 FILE *out; 1786 int tpe; 1787 int curtpe; 1788 int cpnd; 1789 int sunqe; 1790 int runqe; 1791 int mcse; 1792 int ntflg; 1793 char nti[17]; 1794 char nto[17]; 1795 int mapflg; 1796 char mi[MAXPATHLEN]; 1797 char mo[MAXPATHLEN]; 1798 } proxstruct, tmpstruct; 1799 struct comvars *ip, *op; 1800 1801 abrtflag = 0; 1802 oldintr = xsignal(SIGINT, psabort); 1803 if (flag) { 1804 if (proxy) 1805 return; 1806 ip = &tmpstruct; 1807 op = &proxstruct; 1808 proxy++; 1809 } else { 1810 if (!proxy) 1811 return; 1812 ip = &proxstruct; 1813 op = &tmpstruct; 1814 proxy = 0; 1815 } 1816 ip->connect = connected; 1817 connected = op->connect; 1818 if (hostname) 1819 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1820 else 1821 ip->name[0] = '\0'; 1822 hostname = op->name; 1823 ip->hctl = hisctladdr; 1824 hisctladdr = op->hctl; 1825 ip->mctl = myctladdr; 1826 myctladdr = op->mctl; 1827 ip->in = cin; 1828 cin = op->in; 1829 ip->out = cout; 1830 cout = op->out; 1831 ip->tpe = type; 1832 type = op->tpe; 1833 ip->curtpe = curtype; 1834 curtype = op->curtpe; 1835 ip->cpnd = cpend; 1836 cpend = op->cpnd; 1837 ip->sunqe = sunique; 1838 sunique = op->sunqe; 1839 ip->runqe = runique; 1840 runique = op->runqe; 1841 ip->mcse = mcase; 1842 mcase = op->mcse; 1843 ip->ntflg = ntflag; 1844 ntflag = op->ntflg; 1845 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1846 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1847 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1848 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1849 ip->mapflg = mapflag; 1850 mapflag = op->mapflg; 1851 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1852 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1853 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1854 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1855 (void)xsignal(SIGINT, oldintr); 1856 if (abrtflag) { 1857 abrtflag = 0; 1858 (*oldintr)(SIGINT); 1859 } 1860 } 1861 1862 void 1863 abortpt(int notused) 1864 { 1865 1866 sigint_raised = 1; 1867 alarmtimer(0); 1868 if (fromatty) 1869 write(fileno(ttyout), "\n", 1); 1870 ptabflg++; 1871 mflag = 0; 1872 abrtflag = 0; 1873 siglongjmp(ptabort, 1); 1874 } 1875 1876 void 1877 proxtrans(const char *cmd, const char *local, const char *remote) 1878 { 1879 sigfunc oldintr; 1880 int prox_type, nfnd; 1881 volatile int secndflag; 1882 char *cmd2; 1883 1884 #ifdef __GNUC__ /* to shut up gcc warnings */ 1885 (void)&oldintr; 1886 (void)&cmd2; 1887 #endif 1888 1889 oldintr = NULL; 1890 secndflag = 0; 1891 if (strcmp(cmd, "RETR")) 1892 cmd2 = "RETR"; 1893 else 1894 cmd2 = runique ? "STOU" : "STOR"; 1895 if ((prox_type = type) == 0) { 1896 if (unix_server && unix_proxy) 1897 prox_type = TYPE_I; 1898 else 1899 prox_type = TYPE_A; 1900 } 1901 if (curtype != prox_type) 1902 changetype(prox_type, 1); 1903 if (command("PASV") != COMPLETE) { 1904 fputs("proxy server does not support third party transfers.\n", 1905 ttyout); 1906 return; 1907 } 1908 pswitch(0); 1909 if (!connected) { 1910 fputs("No primary connection.\n", ttyout); 1911 pswitch(1); 1912 code = -1; 1913 return; 1914 } 1915 if (curtype != prox_type) 1916 changetype(prox_type, 1); 1917 if (command("PORT %s", pasv) != COMPLETE) { 1918 pswitch(1); 1919 return; 1920 } 1921 if (sigsetjmp(ptabort, 1)) 1922 goto abort; 1923 oldintr = xsignal(SIGINT, abortpt); 1924 if ((restart_point && 1925 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1926 || (command("%s %s", cmd, remote) != PRELIM)) { 1927 (void)xsignal(SIGINT, oldintr); 1928 pswitch(1); 1929 return; 1930 } 1931 sleep(2); 1932 pswitch(1); 1933 secndflag++; 1934 if ((restart_point && 1935 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1936 || (command("%s %s", cmd2, local) != PRELIM)) 1937 goto abort; 1938 ptflag++; 1939 (void)getreply(0); 1940 pswitch(0); 1941 (void)getreply(0); 1942 (void)xsignal(SIGINT, oldintr); 1943 pswitch(1); 1944 ptflag = 0; 1945 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1946 return; 1947 abort: 1948 if (sigsetjmp(xferabort, 1)) { 1949 (void)xsignal(SIGINT, oldintr); 1950 return; 1951 } 1952 (void)xsignal(SIGINT, abort_squared); 1953 ptflag = 0; 1954 if (strcmp(cmd, "RETR") && !proxy) 1955 pswitch(1); 1956 else if (!strcmp(cmd, "RETR") && proxy) 1957 pswitch(0); 1958 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1959 if (command("%s %s", cmd2, local) != PRELIM) { 1960 pswitch(0); 1961 if (cpend) 1962 abort_remote(NULL); 1963 } 1964 pswitch(1); 1965 if (ptabflg) 1966 code = -1; 1967 (void)xsignal(SIGINT, oldintr); 1968 return; 1969 } 1970 if (cpend) 1971 abort_remote(NULL); 1972 pswitch(!proxy); 1973 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1974 if (command("%s %s", cmd2, local) != PRELIM) { 1975 pswitch(0); 1976 if (cpend) 1977 abort_remote(NULL); 1978 pswitch(1); 1979 if (ptabflg) 1980 code = -1; 1981 (void)xsignal(SIGINT, oldintr); 1982 return; 1983 } 1984 } 1985 if (cpend) 1986 abort_remote(NULL); 1987 pswitch(!proxy); 1988 if (cpend) { 1989 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1990 if (nfnd < 0) 1991 warn("abort"); 1992 if (ptabflg) 1993 code = -1; 1994 lostpeer(0); 1995 } 1996 (void)getreply(0); 1997 (void)getreply(0); 1998 } 1999 if (proxy) 2000 pswitch(0); 2001 pswitch(1); 2002 if (ptabflg) 2003 code = -1; 2004 (void)xsignal(SIGINT, oldintr); 2005 } 2006 2007 void 2008 reset(int argc, char *argv[]) 2009 { 2010 int nfnd = 1; 2011 2012 if (argc == 0 && argv != NULL) { 2013 fprintf(ttyout, "usage: %s\n", argv[0]); 2014 code = -1; 2015 return; 2016 } 2017 while (nfnd > 0) { 2018 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2019 warn("reset"); 2020 code = -1; 2021 lostpeer(0); 2022 } else if (nfnd) 2023 (void)getreply(0); 2024 } 2025 } 2026 2027 char * 2028 gunique(const char *local) 2029 { 2030 static char new[MAXPATHLEN]; 2031 char *cp = strrchr(local, '/'); 2032 int d, count=0, len; 2033 char ext = '1'; 2034 2035 if (cp) 2036 *cp = '\0'; 2037 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2038 if (cp) 2039 *cp = '/'; 2040 if (d < 0) { 2041 warn("local: %s", local); 2042 return (NULL); 2043 } 2044 len = strlcpy(new, local, sizeof(new)); 2045 cp = &new[len]; 2046 *cp++ = '.'; 2047 while (!d) { 2048 if (++count == 100) { 2049 fputs("runique: can't find unique file name.\n", 2050 ttyout); 2051 return (NULL); 2052 } 2053 *cp++ = ext; 2054 *cp = '\0'; 2055 if (ext == '9') 2056 ext = '0'; 2057 else 2058 ext++; 2059 if ((d = access(new, F_OK)) < 0) 2060 break; 2061 if (ext != '0') 2062 cp--; 2063 else if (*(cp - 2) == '.') 2064 *(cp - 1) = '1'; 2065 else { 2066 *(cp - 2) = *(cp - 2) + 1; 2067 cp--; 2068 } 2069 } 2070 return (new); 2071 } 2072 2073 /* 2074 * abort_squared -- 2075 * aborts abort_remote(). lostpeer() is called because if the user is 2076 * too impatient to wait or there's another problem then ftp really 2077 * needs to get back to a known state. 2078 */ 2079 void 2080 abort_squared(int dummy) 2081 { 2082 char msgbuf[100]; 2083 size_t len; 2084 2085 sigint_raised = 1; 2086 alarmtimer(0); 2087 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2088 sizeof(msgbuf)); 2089 write(fileno(ttyout), msgbuf, len); 2090 lostpeer(0); 2091 siglongjmp(xferabort, 1); 2092 } 2093 2094 void 2095 abort_remote(FILE *din) 2096 { 2097 char buf[BUFSIZ]; 2098 int nfnd; 2099 2100 if (cout == NULL) { 2101 warnx("Lost control connection for abort."); 2102 if (ptabflg) 2103 code = -1; 2104 lostpeer(0); 2105 return; 2106 } 2107 /* 2108 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2109 * after urgent byte rather than before as is protocol now 2110 */ 2111 buf[0] = IAC; 2112 buf[1] = IP; 2113 buf[2] = IAC; 2114 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2115 warn("abort"); 2116 fprintf(cout, "%cABOR\r\n", DM); 2117 (void)fflush(cout); 2118 if ((nfnd = empty(cin, din, 10)) <= 0) { 2119 if (nfnd < 0) 2120 warn("abort"); 2121 if (ptabflg) 2122 code = -1; 2123 lostpeer(0); 2124 } 2125 if (din && (nfnd & 2)) { 2126 while (read(fileno(din), buf, BUFSIZ) > 0) 2127 continue; 2128 } 2129 if (getreply(0) == ERROR && code == 552) { 2130 /* 552 needed for nic style abort */ 2131 (void)getreply(0); 2132 } 2133 (void)getreply(0); 2134 } 2135 2136 void 2137 ai_unmapped(struct addrinfo *ai) 2138 { 2139 #ifdef INET6 2140 struct sockaddr_in6 *sin6; 2141 struct sockaddr_in sin; 2142 socklen_t len; 2143 2144 if (ai->ai_family != AF_INET6) 2145 return; 2146 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2147 sizeof(sin) > ai->ai_addrlen) 2148 return; 2149 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2150 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2151 return; 2152 2153 memset(&sin, 0, sizeof(sin)); 2154 sin.sin_family = AF_INET; 2155 len = sizeof(struct sockaddr_in); 2156 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2157 sizeof(sin.sin_addr)); 2158 sin.sin_port = sin6->sin6_port; 2159 2160 ai->ai_family = AF_INET; 2161 #if HAVE_SOCKADDR_SA_LEN 2162 sin.sin_len = len; 2163 #endif 2164 memcpy(ai->ai_addr, &sin, len); 2165 ai->ai_addrlen = len; 2166 #endif 2167 } 2168