1 /* 2 * Copyright (c) 1985, 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifndef lint 35 /*static char sccsid[] = "from: @(#)ftp.c 8.4 (Berkeley) 4/6/94";*/ 36 static char *rcsid = "$Id: ftp.c,v 1.10 1995/03/21 14:16:23 mycroft Exp $"; 37 #endif /* not lint */ 38 39 #include <sys/param.h> 40 #include <sys/stat.h> 41 #include <sys/ioctl.h> 42 #include <sys/socket.h> 43 #include <sys/time.h> 44 #include <sys/file.h> 45 46 #include <netinet/in.h> 47 #include <netinet/in_systm.h> 48 #include <netinet/ip.h> 49 #include <arpa/inet.h> 50 #include <arpa/ftp.h> 51 #include <arpa/telnet.h> 52 53 #include <ctype.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fcntl.h> 57 #include <netdb.h> 58 #include <pwd.h> 59 #include <signal.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 #include <varargs.h> 65 66 #include "ftp_var.h" 67 68 extern int h_errno; 69 70 struct sockaddr_in hisctladdr; 71 struct sockaddr_in data_addr; 72 int data = -1; 73 int abrtflag = 0; 74 jmp_buf ptabort; 75 int ptabflg; 76 int ptflag = 0; 77 struct sockaddr_in myctladdr; 78 off_t restart_point = 0; 79 80 81 FILE *cin, *cout; 82 83 char * 84 hookup(host, port) 85 char *host; 86 int port; 87 { 88 struct hostent *hp = 0; 89 int s, len, tos; 90 static char hostnamebuf[80]; 91 92 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 93 hisctladdr.sin_addr.s_addr = inet_addr(host); 94 if (hisctladdr.sin_addr.s_addr != -1) { 95 hisctladdr.sin_family = AF_INET; 96 (void) strncpy(hostnamebuf, host, sizeof(hostnamebuf)); 97 } else { 98 hp = gethostbyname(host); 99 if (hp == NULL) { 100 warnx("%s: %s", host, hstrerror(h_errno)); 101 code = -1; 102 return ((char *) 0); 103 } 104 hisctladdr.sin_family = hp->h_addrtype; 105 memmove((caddr_t)&hisctladdr.sin_addr, 106 hp->h_addr_list[0], hp->h_length); 107 (void) strncpy(hostnamebuf, hp->h_name, sizeof(hostnamebuf)); 108 } 109 hostname = hostnamebuf; 110 s = socket(hisctladdr.sin_family, SOCK_STREAM, 0); 111 if (s < 0) { 112 warn("socket"); 113 code = -1; 114 return (0); 115 } 116 hisctladdr.sin_port = port; 117 while (connect(s, (struct sockaddr *)&hisctladdr, sizeof (hisctladdr)) < 0) { 118 if (hp && hp->h_addr_list[1]) { 119 int oerrno = errno; 120 char *ia; 121 122 ia = inet_ntoa(hisctladdr.sin_addr); 123 errno = oerrno; 124 warn("connect to address %s", ia); 125 hp->h_addr_list++; 126 memmove((caddr_t)&hisctladdr.sin_addr, 127 hp->h_addr_list[0], hp->h_length); 128 fprintf(stdout, "Trying %s...\n", 129 inet_ntoa(hisctladdr.sin_addr)); 130 (void) close(s); 131 s = socket(hisctladdr.sin_family, SOCK_STREAM, 0); 132 if (s < 0) { 133 warn("socket"); 134 code = -1; 135 return (0); 136 } 137 continue; 138 } 139 warn("connect"); 140 code = -1; 141 goto bad; 142 } 143 len = sizeof (myctladdr); 144 if (getsockname(s, (struct sockaddr *)&myctladdr, &len) < 0) { 145 warn("getsockname"); 146 code = -1; 147 goto bad; 148 } 149 #ifdef IP_TOS 150 tos = IPTOS_LOWDELAY; 151 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) 152 warn("setsockopt TOS (ignored)"); 153 #endif 154 cin = fdopen(s, "r"); 155 cout = fdopen(s, "w"); 156 if (cin == NULL || cout == NULL) { 157 warnx("fdopen failed."); 158 if (cin) 159 (void) fclose(cin); 160 if (cout) 161 (void) fclose(cout); 162 code = -1; 163 goto bad; 164 } 165 if (verbose) 166 printf("Connected to %s.\n", hostname); 167 if (getreply(0) > 2) { /* read startup message from server */ 168 if (cin) 169 (void) fclose(cin); 170 if (cout) 171 (void) fclose(cout); 172 code = -1; 173 goto bad; 174 } 175 #ifdef SO_OOBINLINE 176 { 177 int on = 1; 178 179 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)) 180 < 0 && debug) { 181 warn("setsockopt"); 182 } 183 } 184 #endif /* SO_OOBINLINE */ 185 186 return (hostname); 187 bad: 188 (void) close(s); 189 return ((char *)0); 190 } 191 192 int 193 login(host) 194 char *host; 195 { 196 char tmp[80]; 197 char *user, *pass, *acct; 198 int n, aflag = 0; 199 200 user = pass = acct = 0; 201 if (ruserpass(host, &user, &pass, &acct) < 0) { 202 code = -1; 203 return (0); 204 } 205 while (user == NULL) { 206 char *myname = getlogin(); 207 208 if (myname == NULL) { 209 struct passwd *pp = getpwuid(getuid()); 210 211 if (pp != NULL) 212 myname = pp->pw_name; 213 } 214 if (myname) 215 printf("Name (%s:%s): ", host, myname); 216 else 217 printf("Name (%s): ", host); 218 (void) fgets(tmp, sizeof(tmp) - 1, stdin); 219 tmp[strlen(tmp) - 1] = '\0'; 220 if (*tmp == '\0') 221 user = myname; 222 else 223 user = tmp; 224 } 225 n = command("USER %s", user); 226 if (n == CONTINUE) { 227 if (pass == NULL) 228 pass = getpass("Password:"); 229 n = command("PASS %s", pass); 230 } 231 if (n == CONTINUE) { 232 aflag++; 233 acct = getpass("Account:"); 234 n = command("ACCT %s", acct); 235 } 236 if (n != COMPLETE) { 237 warnx("Login failed."); 238 return (0); 239 } 240 if (!aflag && acct != NULL) 241 (void) command("ACCT %s", acct); 242 if (proxy) 243 return (1); 244 for (n = 0; n < macnum; ++n) { 245 if (!strcmp("init", macros[n].mac_name)) { 246 (void) strcpy(line, "$init"); 247 makeargv(); 248 domacro(margc, margv); 249 break; 250 } 251 } 252 return (1); 253 } 254 255 void 256 cmdabort() 257 { 258 259 printf("\n"); 260 (void) fflush(stdout); 261 abrtflag++; 262 if (ptflag) 263 longjmp(ptabort,1); 264 } 265 266 /*VARARGS*/ 267 int 268 command(va_alist) 269 va_dcl 270 { 271 va_list ap; 272 char *fmt; 273 int r; 274 sig_t oldintr; 275 276 abrtflag = 0; 277 if (debug) { 278 printf("---> "); 279 va_start(ap); 280 fmt = va_arg(ap, char *); 281 if (strncmp("PASS ", fmt, 5) == 0) 282 printf("PASS XXXX"); 283 else 284 vfprintf(stdout, fmt, ap); 285 va_end(ap); 286 printf("\n"); 287 (void) fflush(stdout); 288 } 289 if (cout == NULL) { 290 warn("No control connection for command"); 291 code = -1; 292 return (0); 293 } 294 oldintr = signal(SIGINT, cmdabort); 295 va_start(ap); 296 fmt = va_arg(ap, char *); 297 vfprintf(cout, fmt, ap); 298 va_end(ap); 299 fprintf(cout, "\r\n"); 300 (void) fflush(cout); 301 cpend = 1; 302 r = getreply(!strcmp(fmt, "QUIT")); 303 if (abrtflag && oldintr != SIG_IGN) 304 (*oldintr)(SIGINT); 305 (void) signal(SIGINT, oldintr); 306 return (r); 307 } 308 309 char reply_string[BUFSIZ]; /* last line of previous reply */ 310 311 int 312 getreply(expecteof) 313 int expecteof; 314 { 315 int c, n; 316 int dig; 317 int originalcode = 0, continuation = 0; 318 sig_t oldintr; 319 int pflag = 0; 320 char *cp, *pt = pasv; 321 322 oldintr = signal(SIGINT, cmdabort); 323 for (;;) { 324 dig = n = code = 0; 325 cp = reply_string; 326 while ((c = getc(cin)) != '\n') { 327 if (c == IAC) { /* handle telnet commands */ 328 switch (c = getc(cin)) { 329 case WILL: 330 case WONT: 331 c = getc(cin); 332 fprintf(cout, "%c%c%c", IAC, DONT, c); 333 (void) fflush(cout); 334 break; 335 case DO: 336 case DONT: 337 c = getc(cin); 338 fprintf(cout, "%c%c%c", IAC, WONT, c); 339 (void) fflush(cout); 340 break; 341 default: 342 break; 343 } 344 continue; 345 } 346 dig++; 347 if (c == EOF) { 348 if (expecteof) { 349 (void) signal(SIGINT,oldintr); 350 code = 221; 351 return (0); 352 } 353 lostpeer(); 354 if (verbose) { 355 printf("421 Service not available, remote server has closed connection\n"); 356 (void) fflush(stdout); 357 } 358 code = 421; 359 return (4); 360 } 361 if (c != '\r' && (verbose > 0 || 362 (verbose > -1 && n == '5' && dig > 4))) { 363 if (proxflag && 364 (dig == 1 || dig == 5 && verbose == 0)) 365 printf("%s:",hostname); 366 (void) putchar(c); 367 } 368 if (dig < 4 && isdigit(c)) 369 code = code * 10 + (c - '0'); 370 if (!pflag && code == 227) 371 pflag = 1; 372 if (dig > 4 && pflag == 1 && isdigit(c)) 373 pflag = 2; 374 if (pflag == 2) { 375 if (c != '\r' && c != ')') 376 *pt++ = c; 377 else { 378 *pt = '\0'; 379 pflag = 3; 380 } 381 } 382 if (dig == 4 && c == '-') { 383 if (continuation) 384 code = 0; 385 continuation++; 386 } 387 if (n == 0) 388 n = c; 389 if (cp < &reply_string[sizeof(reply_string) - 1]) 390 *cp++ = c; 391 } 392 if (verbose > 0 || verbose > -1 && n == '5') { 393 (void) putchar(c); 394 (void) fflush (stdout); 395 } 396 if (continuation && code != originalcode) { 397 if (originalcode == 0) 398 originalcode = code; 399 continue; 400 } 401 *cp = '\0'; 402 if (n != '1') 403 cpend = 0; 404 (void) signal(SIGINT,oldintr); 405 if (code == 421 || originalcode == 421) 406 lostpeer(); 407 if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN) 408 (*oldintr)(SIGINT); 409 return (n - '0'); 410 } 411 } 412 413 int 414 empty(mask, sec) 415 struct fd_set *mask; 416 int sec; 417 { 418 struct timeval t; 419 420 t.tv_sec = (long) sec; 421 t.tv_usec = 0; 422 return (select(32, mask, (struct fd_set *) 0, (struct fd_set *) 0, &t)); 423 } 424 425 jmp_buf sendabort; 426 427 void 428 abortsend() 429 { 430 431 mflag = 0; 432 abrtflag = 0; 433 printf("\nsend aborted\nwaiting for remote to finish abort\n"); 434 (void) fflush(stdout); 435 longjmp(sendabort, 1); 436 } 437 438 #define HASHBYTES 1024 439 440 void 441 sendrequest(cmd, local, remote, printnames) 442 char *cmd, *local, *remote; 443 int printnames; 444 { 445 struct stat st; 446 struct timeval start, stop; 447 int c, d; 448 FILE *fin, *dout = 0, *popen(); 449 int (*closefunc) __P((FILE *)); 450 sig_t oldintr, oldintp; 451 long bytes = 0, hashbytes = HASHBYTES; 452 char *lmode, buf[BUFSIZ], *bufp; 453 454 if (verbose && printnames) { 455 if (local && *local != '-') 456 printf("local: %s ", local); 457 if (remote) 458 printf("remote: %s\n", remote); 459 } 460 if (proxy) { 461 proxtrans(cmd, local, remote); 462 return; 463 } 464 if (curtype != type) 465 changetype(type, 0); 466 closefunc = NULL; 467 oldintr = NULL; 468 oldintp = NULL; 469 lmode = "w"; 470 if (setjmp(sendabort)) { 471 while (cpend) { 472 (void) getreply(0); 473 } 474 if (data >= 0) { 475 (void) close(data); 476 data = -1; 477 } 478 if (oldintr) 479 (void) signal(SIGINT,oldintr); 480 if (oldintp) 481 (void) signal(SIGPIPE,oldintp); 482 code = -1; 483 return; 484 } 485 oldintr = signal(SIGINT, abortsend); 486 if (strcmp(local, "-") == 0) 487 fin = stdin; 488 else if (*local == '|') { 489 oldintp = signal(SIGPIPE,SIG_IGN); 490 fin = popen(local + 1, "r"); 491 if (fin == NULL) { 492 warn("%s", local + 1); 493 (void) signal(SIGINT, oldintr); 494 (void) signal(SIGPIPE, oldintp); 495 code = -1; 496 return; 497 } 498 closefunc = pclose; 499 } else { 500 fin = fopen(local, "r"); 501 if (fin == NULL) { 502 warn("local: %s", local); 503 (void) signal(SIGINT, oldintr); 504 code = -1; 505 return; 506 } 507 closefunc = fclose; 508 if (fstat(fileno(fin), &st) < 0 || 509 (st.st_mode&S_IFMT) != S_IFREG) { 510 fprintf(stdout, "%s: not a plain file.\n", local); 511 (void) signal(SIGINT, oldintr); 512 fclose(fin); 513 code = -1; 514 return; 515 } 516 } 517 if (initconn()) { 518 (void) signal(SIGINT, oldintr); 519 if (oldintp) 520 (void) signal(SIGPIPE, oldintp); 521 code = -1; 522 if (closefunc != NULL) 523 (*closefunc)(fin); 524 return; 525 } 526 if (setjmp(sendabort)) 527 goto abort; 528 529 if (restart_point && 530 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 531 int rc; 532 533 switch (curtype) { 534 case TYPE_A: 535 rc = fseek(fin, (long) restart_point, SEEK_SET); 536 break; 537 case TYPE_I: 538 case TYPE_L: 539 rc = lseek(fileno(fin), restart_point, SEEK_SET); 540 break; 541 } 542 if (rc < 0) { 543 warn("local: %s", local); 544 restart_point = 0; 545 if (closefunc != NULL) 546 (*closefunc)(fin); 547 return; 548 } 549 if (command("REST %ld", (long) restart_point) 550 != CONTINUE) { 551 restart_point = 0; 552 if (closefunc != NULL) 553 (*closefunc)(fin); 554 return; 555 } 556 restart_point = 0; 557 lmode = "r+w"; 558 } 559 if (remote) { 560 if (command("%s %s", cmd, remote) != PRELIM) { 561 (void) signal(SIGINT, oldintr); 562 if (oldintp) 563 (void) signal(SIGPIPE, oldintp); 564 if (closefunc != NULL) 565 (*closefunc)(fin); 566 return; 567 } 568 } else 569 if (command("%s", cmd) != PRELIM) { 570 (void) signal(SIGINT, oldintr); 571 if (oldintp) 572 (void) signal(SIGPIPE, oldintp); 573 if (closefunc != NULL) 574 (*closefunc)(fin); 575 return; 576 } 577 dout = dataconn(lmode); 578 if (dout == NULL) 579 goto abort; 580 (void) gettimeofday(&start, (struct timezone *)0); 581 oldintp = signal(SIGPIPE, SIG_IGN); 582 switch (curtype) { 583 584 case TYPE_I: 585 case TYPE_L: 586 errno = d = 0; 587 while ((c = read(fileno(fin), buf, sizeof (buf))) > 0) { 588 bytes += c; 589 for (bufp = buf; c > 0; c -= d, bufp += d) 590 if ((d = write(fileno(dout), bufp, c)) <= 0) 591 break; 592 if (hash) { 593 while (bytes >= hashbytes) { 594 (void) putchar('#'); 595 hashbytes += HASHBYTES; 596 } 597 (void) fflush(stdout); 598 } 599 } 600 if (hash && bytes > 0) { 601 if (bytes < HASHBYTES) 602 (void) putchar('#'); 603 (void) putchar('\n'); 604 (void) fflush(stdout); 605 } 606 if (c < 0) 607 warn("local: %s", local); 608 if (d < 0) { 609 if (errno != EPIPE) 610 warn("netout"); 611 bytes = -1; 612 } 613 break; 614 615 case TYPE_A: 616 while ((c = getc(fin)) != EOF) { 617 if (c == '\n') { 618 while (hash && (bytes >= hashbytes)) { 619 (void) putchar('#'); 620 (void) fflush(stdout); 621 hashbytes += HASHBYTES; 622 } 623 if (ferror(dout)) 624 break; 625 (void) putc('\r', dout); 626 bytes++; 627 } 628 (void) putc(c, dout); 629 bytes++; 630 /* if (c == '\r') { */ 631 /* (void) putc('\0', dout); // this violates rfc */ 632 /* bytes++; */ 633 /* } */ 634 } 635 if (hash) { 636 if (bytes < hashbytes) 637 (void) putchar('#'); 638 (void) putchar('\n'); 639 (void) fflush(stdout); 640 } 641 if (ferror(fin)) 642 warn("local: %s", local); 643 if (ferror(dout)) { 644 if (errno != EPIPE) 645 warn("netout"); 646 bytes = -1; 647 } 648 break; 649 } 650 (void) gettimeofday(&stop, (struct timezone *)0); 651 if (closefunc != NULL) 652 (*closefunc)(fin); 653 (void) fclose(dout); 654 (void) getreply(0); 655 (void) signal(SIGINT, oldintr); 656 if (oldintp) 657 (void) signal(SIGPIPE, oldintp); 658 if (bytes > 0) 659 ptransfer("sent", bytes, &start, &stop); 660 return; 661 abort: 662 (void) gettimeofday(&stop, (struct timezone *)0); 663 (void) signal(SIGINT, oldintr); 664 if (oldintp) 665 (void) signal(SIGPIPE, oldintp); 666 if (!cpend) { 667 code = -1; 668 return; 669 } 670 if (data >= 0) { 671 (void) close(data); 672 data = -1; 673 } 674 if (dout) 675 (void) fclose(dout); 676 (void) getreply(0); 677 code = -1; 678 if (closefunc != NULL && fin != NULL) 679 (*closefunc)(fin); 680 if (bytes > 0) 681 ptransfer("sent", bytes, &start, &stop); 682 } 683 684 jmp_buf recvabort; 685 686 void 687 abortrecv() 688 { 689 690 mflag = 0; 691 abrtflag = 0; 692 printf("\nreceive aborted\nwaiting for remote to finish abort\n"); 693 (void) fflush(stdout); 694 longjmp(recvabort, 1); 695 } 696 697 void 698 recvrequest(cmd, local, remote, lmode, printnames) 699 char *cmd, *local, *remote, *lmode; 700 int printnames; 701 { 702 FILE *fout, *din = 0; 703 int (*closefunc) __P((FILE *)); 704 sig_t oldintr, oldintp; 705 int c, d, is_retr, tcrflag, bare_lfs = 0; 706 static int bufsize; 707 static char *buf; 708 long bytes = 0, hashbytes = HASHBYTES; 709 struct timeval start, stop; 710 struct stat st; 711 712 is_retr = strcmp(cmd, "RETR") == 0; 713 if (is_retr && verbose && printnames) { 714 if (local && *local != '-') 715 printf("local: %s ", local); 716 if (remote) 717 printf("remote: %s\n", remote); 718 } 719 if (proxy && is_retr) { 720 proxtrans(cmd, local, remote); 721 return; 722 } 723 closefunc = NULL; 724 oldintr = NULL; 725 oldintp = NULL; 726 tcrflag = !crflag && is_retr; 727 if (setjmp(recvabort)) { 728 while (cpend) { 729 (void) getreply(0); 730 } 731 if (data >= 0) { 732 (void) close(data); 733 data = -1; 734 } 735 if (oldintr) 736 (void) signal(SIGINT, oldintr); 737 code = -1; 738 return; 739 } 740 oldintr = signal(SIGINT, abortrecv); 741 if (strcmp(local, "-") && *local != '|') { 742 if (access(local, 2) < 0) { 743 char *dir = strrchr(local, '/'); 744 745 if (errno != ENOENT && errno != EACCES) { 746 warn("local: %s", local); 747 (void) signal(SIGINT, oldintr); 748 code = -1; 749 return; 750 } 751 if (dir != NULL) 752 *dir = 0; 753 d = access(dir ? local : ".", 2); 754 if (dir != NULL) 755 *dir = '/'; 756 if (d < 0) { 757 warn("local: %s", local); 758 (void) signal(SIGINT, oldintr); 759 code = -1; 760 return; 761 } 762 if (!runique && errno == EACCES && 763 chmod(local, 0600) < 0) { 764 warn("local: %s", local); 765 (void) signal(SIGINT, oldintr); 766 (void) signal(SIGINT, oldintr); 767 code = -1; 768 return; 769 } 770 if (runique && errno == EACCES && 771 (local = gunique(local)) == NULL) { 772 (void) signal(SIGINT, oldintr); 773 code = -1; 774 return; 775 } 776 } 777 else if (runique && (local = gunique(local)) == NULL) { 778 (void) signal(SIGINT, oldintr); 779 code = -1; 780 return; 781 } 782 } 783 if (!is_retr) { 784 if (curtype != TYPE_A) 785 changetype(TYPE_A, 0); 786 } else if (curtype != type) 787 changetype(type, 0); 788 if (initconn()) { 789 (void) signal(SIGINT, oldintr); 790 code = -1; 791 return; 792 } 793 if (setjmp(recvabort)) 794 goto abort; 795 if (is_retr && restart_point && 796 command("REST %ld", (long) restart_point) != CONTINUE) 797 return; 798 if (remote) { 799 if (command("%s %s", cmd, remote) != PRELIM) { 800 (void) signal(SIGINT, oldintr); 801 return; 802 } 803 } else { 804 if (command("%s", cmd) != PRELIM) { 805 (void) signal(SIGINT, oldintr); 806 return; 807 } 808 } 809 din = dataconn("r"); 810 if (din == NULL) 811 goto abort; 812 if (strcmp(local, "-") == 0) 813 fout = stdout; 814 else if (*local == '|') { 815 oldintp = signal(SIGPIPE, SIG_IGN); 816 fout = popen(local + 1, "w"); 817 if (fout == NULL) { 818 warn("%s", local+1); 819 goto abort; 820 } 821 closefunc = pclose; 822 } else { 823 fout = fopen(local, lmode); 824 if (fout == NULL) { 825 warn("local: %s", local); 826 goto abort; 827 } 828 closefunc = fclose; 829 } 830 if (fstat(fileno(fout), &st) < 0 || st.st_blksize == 0) 831 st.st_blksize = BUFSIZ; 832 if (st.st_blksize > bufsize) { 833 if (buf) 834 (void) free(buf); 835 buf = malloc((unsigned)st.st_blksize); 836 if (buf == NULL) { 837 warn("malloc"); 838 bufsize = 0; 839 goto abort; 840 } 841 bufsize = st.st_blksize; 842 } 843 (void) gettimeofday(&start, (struct timezone *)0); 844 switch (curtype) { 845 846 case TYPE_I: 847 case TYPE_L: 848 if (restart_point && 849 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 850 warn("local: %s", local); 851 if (closefunc != NULL) 852 (*closefunc)(fout); 853 return; 854 } 855 errno = d = 0; 856 while ((c = read(fileno(din), buf, bufsize)) > 0) { 857 if ((d = write(fileno(fout), buf, c)) != c) 858 break; 859 bytes += c; 860 if (hash) { 861 while (bytes >= hashbytes) { 862 (void) putchar('#'); 863 hashbytes += HASHBYTES; 864 } 865 (void) fflush(stdout); 866 } 867 } 868 if (hash && bytes > 0) { 869 if (bytes < HASHBYTES) 870 (void) putchar('#'); 871 (void) putchar('\n'); 872 (void) fflush(stdout); 873 } 874 if (c < 0) { 875 if (errno != EPIPE) 876 warn("netin"); 877 bytes = -1; 878 } 879 if (d < c) { 880 if (d < 0) 881 warn("local: %s", local); 882 else 883 warnx("%s: short write", local); 884 } 885 break; 886 887 case TYPE_A: 888 if (restart_point) { 889 int i, n, ch; 890 891 if (fseek(fout, 0L, SEEK_SET) < 0) 892 goto done; 893 n = restart_point; 894 for (i = 0; i++ < n;) { 895 if ((ch = getc(fout)) == EOF) 896 goto done; 897 if (ch == '\n') 898 i++; 899 } 900 if (fseek(fout, 0L, SEEK_CUR) < 0) { 901 done: 902 warn("local: %s", local); 903 if (closefunc != NULL) 904 (*closefunc)(fout); 905 return; 906 } 907 } 908 while ((c = getc(din)) != EOF) { 909 if (c == '\n') 910 bare_lfs++; 911 while (c == '\r') { 912 while (hash && (bytes >= hashbytes)) { 913 (void) putchar('#'); 914 (void) fflush(stdout); 915 hashbytes += HASHBYTES; 916 } 917 bytes++; 918 if ((c = getc(din)) != '\n' || tcrflag) { 919 if (ferror(fout)) 920 goto break2; 921 (void) putc('\r', fout); 922 if (c == '\0') { 923 bytes++; 924 goto contin2; 925 } 926 if (c == EOF) 927 goto contin2; 928 } 929 } 930 (void) putc(c, fout); 931 bytes++; 932 contin2: ; 933 } 934 break2: 935 if (bare_lfs) { 936 printf("WARNING! %d bare linefeeds received in ASCII mode\n", bare_lfs); 937 printf("File may not have transferred correctly.\n"); 938 } 939 if (hash) { 940 if (bytes < hashbytes) 941 (void) putchar('#'); 942 (void) putchar('\n'); 943 (void) fflush(stdout); 944 } 945 if (ferror(din)) { 946 if (errno != EPIPE) 947 warn("netin"); 948 bytes = -1; 949 } 950 if (ferror(fout)) 951 warn("local: %s", local); 952 break; 953 } 954 if (closefunc != NULL) 955 (*closefunc)(fout); 956 (void) signal(SIGINT, oldintr); 957 if (oldintp) 958 (void) signal(SIGPIPE, oldintp); 959 (void) gettimeofday(&stop, (struct timezone *)0); 960 (void) fclose(din); 961 (void) getreply(0); 962 if (bytes > 0 && is_retr) 963 ptransfer("received", bytes, &start, &stop); 964 return; 965 abort: 966 967 /* abort using RFC959 recommended IP,SYNC sequence */ 968 969 (void) gettimeofday(&stop, (struct timezone *)0); 970 if (oldintp) 971 (void) signal(SIGPIPE, oldintr); 972 (void) signal(SIGINT, SIG_IGN); 973 if (!cpend) { 974 code = -1; 975 (void) signal(SIGINT, oldintr); 976 return; 977 } 978 979 abort_remote(din); 980 code = -1; 981 if (data >= 0) { 982 (void) close(data); 983 data = -1; 984 } 985 if (closefunc != NULL && fout != NULL) 986 (*closefunc)(fout); 987 if (din) 988 (void) fclose(din); 989 if (bytes > 0) 990 ptransfer("received", bytes, &start, &stop); 991 (void) signal(SIGINT, oldintr); 992 } 993 994 /* 995 * Need to start a listen on the data channel before we send the command, 996 * otherwise the server's connect may fail. 997 */ 998 int 999 initconn() 1000 { 1001 char *p, *a; 1002 int result, len, tmpno = 0; 1003 int on = 1; 1004 int a0, a1, a2, a3, p0, p1; 1005 1006 if (passivemode) { 1007 data = socket(AF_INET, SOCK_STREAM, 0); 1008 if (data < 0) { 1009 perror("ftp: socket"); 1010 return(1); 1011 } 1012 if ((options & SO_DEBUG) && 1013 setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, 1014 sizeof (on)) < 0) 1015 perror("ftp: setsockopt (ignored)"); 1016 if (command("PASV") != COMPLETE) { 1017 printf("Passive mode refused.\n"); 1018 goto bad; 1019 } 1020 1021 /* 1022 * What we've got at this point is a string of comma 1023 * separated one-byte unsigned integer values, separated 1024 * by commas. The first four are the an IP address. The 1025 * fifth is the MSB of the port number, the sixth is the 1026 * LSB. From that we'll prepare a sockaddr_in. 1027 */ 1028 1029 if (sscanf(pasv,"%d,%d,%d,%d,%d,%d", 1030 &a0, &a1, &a2, &a3, &p0, &p1) != 6) { 1031 printf("Passive mode address scan failure. " 1032 "Shouldn't happen!\n"); 1033 goto bad; 1034 } 1035 1036 bzero(&data_addr, sizeof(data_addr)); 1037 data_addr.sin_family = AF_INET; 1038 a = (char *)&data_addr.sin_addr.s_addr; 1039 a[0] = a0 & 0xff; 1040 a[1] = a1 & 0xff; 1041 a[2] = a2 & 0xff; 1042 a[3] = a3 & 0xff; 1043 p = (char *)&data_addr.sin_port; 1044 p[0] = p0 & 0xff; 1045 p[1] = p1 & 0xff; 1046 1047 if (connect(data, (struct sockaddr *)&data_addr, 1048 sizeof(data_addr)) < 0) { 1049 perror("ftp: connect"); 1050 goto bad; 1051 } 1052 #ifdef IP_TOS 1053 on = IPTOS_THROUGHPUT; 1054 if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, 1055 sizeof(int)) < 0) 1056 perror("ftp: setsockopt TOS (ignored)"); 1057 #endif 1058 return(0); 1059 } 1060 1061 noport: 1062 data_addr = myctladdr; 1063 if (sendport) 1064 data_addr.sin_port = 0; /* let system pick one */ 1065 if (data != -1) 1066 (void) close(data); 1067 data = socket(AF_INET, SOCK_STREAM, 0); 1068 if (data < 0) { 1069 warn("socket"); 1070 if (tmpno) 1071 sendport = 1; 1072 return (1); 1073 } 1074 if (!sendport) 1075 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, (char *)&on, sizeof (on)) < 0) { 1076 warn("setsockopt (reuse address)"); 1077 goto bad; 1078 } 1079 if (bind(data, (struct sockaddr *)&data_addr, sizeof (data_addr)) < 0) { 1080 warn("bind"); 1081 goto bad; 1082 } 1083 if (options & SO_DEBUG && 1084 setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on, sizeof (on)) < 0) 1085 warn("setsockopt (ignored)"); 1086 len = sizeof (data_addr); 1087 if (getsockname(data, (struct sockaddr *)&data_addr, &len) < 0) { 1088 warn("getsockname"); 1089 goto bad; 1090 } 1091 if (listen(data, 1) < 0) 1092 warn("listen"); 1093 if (sendport) { 1094 a = (char *)&data_addr.sin_addr; 1095 p = (char *)&data_addr.sin_port; 1096 #define UC(b) (((int)b)&0xff) 1097 result = 1098 command("PORT %d,%d,%d,%d,%d,%d", 1099 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1100 UC(p[0]), UC(p[1])); 1101 if (result == ERROR && sendport == -1) { 1102 sendport = 0; 1103 tmpno = 1; 1104 goto noport; 1105 } 1106 return (result != COMPLETE); 1107 } 1108 if (tmpno) 1109 sendport = 1; 1110 #ifdef IP_TOS 1111 on = IPTOS_THROUGHPUT; 1112 if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) 1113 warn("setsockopt TOS (ignored)"); 1114 #endif 1115 return (0); 1116 bad: 1117 (void) close(data), data = -1; 1118 if (tmpno) 1119 sendport = 1; 1120 return (1); 1121 } 1122 1123 FILE * 1124 dataconn(lmode) 1125 char *lmode; 1126 { 1127 struct sockaddr_in from; 1128 int s, fromlen = sizeof (from), tos; 1129 1130 if (passivemode) 1131 return (fdopen(data, lmode)); 1132 1133 s = accept(data, (struct sockaddr *) &from, &fromlen); 1134 if (s < 0) { 1135 warn("accept"); 1136 (void) close(data), data = -1; 1137 return (NULL); 1138 } 1139 (void) close(data); 1140 data = s; 1141 #ifdef IP_TOS 1142 tos = IPTOS_THROUGHPUT; 1143 if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) < 0) 1144 warn("setsockopt TOS (ignored)"); 1145 #endif 1146 return (fdopen(data, lmode)); 1147 } 1148 1149 void 1150 ptransfer(direction, bytes, t0, t1) 1151 char *direction; 1152 long bytes; 1153 struct timeval *t0, *t1; 1154 { 1155 struct timeval td; 1156 float s; 1157 long bs; 1158 1159 if (verbose) { 1160 timersub(t1, t0, &td); 1161 s = td.tv_sec + (td.tv_usec / 1000000.); 1162 #define nz(x) ((x) == 0 ? 1 : (x)) 1163 bs = bytes / nz(s); 1164 printf("%ld bytes %s in %.3g seconds (%ld bytes/s)\n", 1165 bytes, direction, s, bs); 1166 } 1167 } 1168 1169 void 1170 psabort() 1171 { 1172 1173 abrtflag++; 1174 } 1175 1176 void 1177 pswitch(flag) 1178 int flag; 1179 { 1180 sig_t oldintr; 1181 static struct comvars { 1182 int connect; 1183 char name[MAXHOSTNAMELEN]; 1184 struct sockaddr_in mctl; 1185 struct sockaddr_in hctl; 1186 FILE *in; 1187 FILE *out; 1188 int tpe; 1189 int curtpe; 1190 int cpnd; 1191 int sunqe; 1192 int runqe; 1193 int mcse; 1194 int ntflg; 1195 char nti[17]; 1196 char nto[17]; 1197 int mapflg; 1198 char mi[MAXPATHLEN]; 1199 char mo[MAXPATHLEN]; 1200 } proxstruct, tmpstruct; 1201 struct comvars *ip, *op; 1202 1203 abrtflag = 0; 1204 oldintr = signal(SIGINT, psabort); 1205 if (flag) { 1206 if (proxy) 1207 return; 1208 ip = &tmpstruct; 1209 op = &proxstruct; 1210 proxy++; 1211 } else { 1212 if (!proxy) 1213 return; 1214 ip = &proxstruct; 1215 op = &tmpstruct; 1216 proxy = 0; 1217 } 1218 ip->connect = connected; 1219 connected = op->connect; 1220 if (hostname) { 1221 (void) strncpy(ip->name, hostname, sizeof(ip->name) - 1); 1222 ip->name[strlen(ip->name)] = '\0'; 1223 } else 1224 ip->name[0] = 0; 1225 hostname = op->name; 1226 ip->hctl = hisctladdr; 1227 hisctladdr = op->hctl; 1228 ip->mctl = myctladdr; 1229 myctladdr = op->mctl; 1230 ip->in = cin; 1231 cin = op->in; 1232 ip->out = cout; 1233 cout = op->out; 1234 ip->tpe = type; 1235 type = op->tpe; 1236 ip->curtpe = curtype; 1237 curtype = op->curtpe; 1238 ip->cpnd = cpend; 1239 cpend = op->cpnd; 1240 ip->sunqe = sunique; 1241 sunique = op->sunqe; 1242 ip->runqe = runique; 1243 runique = op->runqe; 1244 ip->mcse = mcase; 1245 mcase = op->mcse; 1246 ip->ntflg = ntflag; 1247 ntflag = op->ntflg; 1248 (void) strncpy(ip->nti, ntin, 16); 1249 (ip->nti)[strlen(ip->nti)] = '\0'; 1250 (void) strcpy(ntin, op->nti); 1251 (void) strncpy(ip->nto, ntout, 16); 1252 (ip->nto)[strlen(ip->nto)] = '\0'; 1253 (void) strcpy(ntout, op->nto); 1254 ip->mapflg = mapflag; 1255 mapflag = op->mapflg; 1256 (void) strncpy(ip->mi, mapin, MAXPATHLEN - 1); 1257 (ip->mi)[strlen(ip->mi)] = '\0'; 1258 (void) strcpy(mapin, op->mi); 1259 (void) strncpy(ip->mo, mapout, MAXPATHLEN - 1); 1260 (ip->mo)[strlen(ip->mo)] = '\0'; 1261 (void) strcpy(mapout, op->mo); 1262 (void) signal(SIGINT, oldintr); 1263 if (abrtflag) { 1264 abrtflag = 0; 1265 (*oldintr)(SIGINT); 1266 } 1267 } 1268 1269 void 1270 abortpt() 1271 { 1272 1273 printf("\n"); 1274 (void) fflush(stdout); 1275 ptabflg++; 1276 mflag = 0; 1277 abrtflag = 0; 1278 longjmp(ptabort, 1); 1279 } 1280 1281 void 1282 proxtrans(cmd, local, remote) 1283 char *cmd, *local, *remote; 1284 { 1285 sig_t oldintr; 1286 int secndflag = 0, prox_type, nfnd; 1287 char *cmd2; 1288 struct fd_set mask; 1289 1290 if (strcmp(cmd, "RETR")) 1291 cmd2 = "RETR"; 1292 else 1293 cmd2 = runique ? "STOU" : "STOR"; 1294 if ((prox_type = type) == 0) { 1295 if (unix_server && unix_proxy) 1296 prox_type = TYPE_I; 1297 else 1298 prox_type = TYPE_A; 1299 } 1300 if (curtype != prox_type) 1301 changetype(prox_type, 1); 1302 if (command("PASV") != COMPLETE) { 1303 printf("proxy server does not support third party transfers.\n"); 1304 return; 1305 } 1306 pswitch(0); 1307 if (!connected) { 1308 printf("No primary connection\n"); 1309 pswitch(1); 1310 code = -1; 1311 return; 1312 } 1313 if (curtype != prox_type) 1314 changetype(prox_type, 1); 1315 if (command("PORT %s", pasv) != COMPLETE) { 1316 pswitch(1); 1317 return; 1318 } 1319 if (setjmp(ptabort)) 1320 goto abort; 1321 oldintr = signal(SIGINT, abortpt); 1322 if (command("%s %s", cmd, remote) != PRELIM) { 1323 (void) signal(SIGINT, oldintr); 1324 pswitch(1); 1325 return; 1326 } 1327 sleep(2); 1328 pswitch(1); 1329 secndflag++; 1330 if (command("%s %s", cmd2, local) != PRELIM) 1331 goto abort; 1332 ptflag++; 1333 (void) getreply(0); 1334 pswitch(0); 1335 (void) getreply(0); 1336 (void) signal(SIGINT, oldintr); 1337 pswitch(1); 1338 ptflag = 0; 1339 printf("local: %s remote: %s\n", local, remote); 1340 return; 1341 abort: 1342 (void) signal(SIGINT, SIG_IGN); 1343 ptflag = 0; 1344 if (strcmp(cmd, "RETR") && !proxy) 1345 pswitch(1); 1346 else if (!strcmp(cmd, "RETR") && proxy) 1347 pswitch(0); 1348 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1349 if (command("%s %s", cmd2, local) != PRELIM) { 1350 pswitch(0); 1351 if (cpend) 1352 abort_remote((FILE *) NULL); 1353 } 1354 pswitch(1); 1355 if (ptabflg) 1356 code = -1; 1357 (void) signal(SIGINT, oldintr); 1358 return; 1359 } 1360 if (cpend) 1361 abort_remote((FILE *) NULL); 1362 pswitch(!proxy); 1363 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1364 if (command("%s %s", cmd2, local) != PRELIM) { 1365 pswitch(0); 1366 if (cpend) 1367 abort_remote((FILE *) NULL); 1368 pswitch(1); 1369 if (ptabflg) 1370 code = -1; 1371 (void) signal(SIGINT, oldintr); 1372 return; 1373 } 1374 } 1375 if (cpend) 1376 abort_remote((FILE *) NULL); 1377 pswitch(!proxy); 1378 if (cpend) { 1379 FD_ZERO(&mask); 1380 FD_SET(fileno(cin), &mask); 1381 if ((nfnd = empty(&mask, 10)) <= 0) { 1382 if (nfnd < 0) { 1383 warn("abort"); 1384 } 1385 if (ptabflg) 1386 code = -1; 1387 lostpeer(); 1388 } 1389 (void) getreply(0); 1390 (void) getreply(0); 1391 } 1392 if (proxy) 1393 pswitch(0); 1394 pswitch(1); 1395 if (ptabflg) 1396 code = -1; 1397 (void) signal(SIGINT, oldintr); 1398 } 1399 1400 void 1401 reset(argc, argv) 1402 int argc; 1403 char *argv[]; 1404 { 1405 struct fd_set mask; 1406 int nfnd = 1; 1407 1408 FD_ZERO(&mask); 1409 while (nfnd > 0) { 1410 FD_SET(fileno(cin), &mask); 1411 if ((nfnd = empty(&mask,0)) < 0) { 1412 warn("reset"); 1413 code = -1; 1414 lostpeer(); 1415 } 1416 else if (nfnd) { 1417 (void) getreply(0); 1418 } 1419 } 1420 } 1421 1422 char * 1423 gunique(local) 1424 char *local; 1425 { 1426 static char new[MAXPATHLEN]; 1427 char *cp = strrchr(local, '/'); 1428 int d, count=0; 1429 char ext = '1'; 1430 1431 if (cp) 1432 *cp = '\0'; 1433 d = access(cp ? local : ".", 2); 1434 if (cp) 1435 *cp = '/'; 1436 if (d < 0) { 1437 warn("local: %s", local); 1438 return ((char *) 0); 1439 } 1440 (void) strcpy(new, local); 1441 cp = new + strlen(new); 1442 *cp++ = '.'; 1443 while (!d) { 1444 if (++count == 100) { 1445 printf("runique: can't find unique file name.\n"); 1446 return ((char *) 0); 1447 } 1448 *cp++ = ext; 1449 *cp = '\0'; 1450 if (ext == '9') 1451 ext = '0'; 1452 else 1453 ext++; 1454 if ((d = access(new, 0)) < 0) 1455 break; 1456 if (ext != '0') 1457 cp--; 1458 else if (*(cp - 2) == '.') 1459 *(cp - 1) = '1'; 1460 else { 1461 *(cp - 2) = *(cp - 2) + 1; 1462 cp--; 1463 } 1464 } 1465 return (new); 1466 } 1467 1468 void 1469 abort_remote(din) 1470 FILE *din; 1471 { 1472 char buf[BUFSIZ]; 1473 int nfnd; 1474 struct fd_set mask; 1475 1476 /* 1477 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 1478 * after urgent byte rather than before as is protocol now 1479 */ 1480 sprintf(buf, "%c%c%c", IAC, IP, IAC); 1481 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 1482 warn("abort"); 1483 fprintf(cout,"%cABOR\r\n", DM); 1484 (void) fflush(cout); 1485 FD_ZERO(&mask); 1486 FD_SET(fileno(cin), &mask); 1487 if (din) { 1488 FD_SET(fileno(din), &mask); 1489 } 1490 if ((nfnd = empty(&mask, 10)) <= 0) { 1491 if (nfnd < 0) { 1492 warn("abort"); 1493 } 1494 if (ptabflg) 1495 code = -1; 1496 lostpeer(); 1497 } 1498 if (din && FD_ISSET(fileno(din), &mask)) { 1499 while (read(fileno(din), buf, BUFSIZ) > 0) 1500 /* LOOP */; 1501 } 1502 if (getreply(0) == ERROR && code == 552) { 1503 /* 552 needed for nic style abort */ 1504 (void) getreply(0); 1505 } 1506 (void) getreply(0); 1507 } 1508