1 /* $NetBSD: fetch.c,v 1.125 2000/09/28 12:29:23 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2000 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 * This code is derived from software contributed to The NetBSD Foundation 11 * by Scott Aaron Bamford. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42 #include <sys/cdefs.h> 43 #ifndef lint 44 __RCSID("$NetBSD: fetch.c,v 1.125 2000/09/28 12:29:23 lukem Exp $"); 45 #endif /* not lint */ 46 47 /* 48 * FTP User Program -- Command line file retrieval 49 */ 50 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <sys/socket.h> 54 #include <sys/stat.h> 55 #include <sys/time.h> 56 57 #include <netinet/in.h> 58 59 #include <arpa/ftp.h> 60 #include <arpa/inet.h> 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <netdb.h> 66 #include <fcntl.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 #include <time.h> 72 #include <util.h> 73 74 #include "ftp_var.h" 75 #include "version.h" 76 77 typedef enum { 78 UNKNOWN_URL_T=-1, 79 HTTP_URL_T, 80 FTP_URL_T, 81 FILE_URL_T, 82 CLASSIC_URL_T 83 } url_t; 84 85 void aborthttp(int); 86 static int auth_url(const char *, char **, const char *, const char *); 87 static void base64_encode(const char *, size_t, char *); 88 static int go_fetch(const char *); 89 static int fetch_ftp(const char *); 90 static int fetch_url(const char *, const char *, char *, char *); 91 static int parse_url(const char *, const char *, url_t *, char **, 92 char **, char **, char **, in_port_t *, char **); 93 static void url_decode(char *); 94 95 static int redirect_loop; 96 97 98 #define ABOUT_URL "about:" /* propaganda */ 99 #define FILE_URL "file://" /* file URL prefix */ 100 #define FTP_URL "ftp://" /* ftp URL prefix */ 101 #define HTTP_URL "http://" /* http URL prefix */ 102 103 104 /* 105 * Generate authorization response based on given authentication challenge. 106 * Returns -1 if an error occurred, otherwise 0. 107 * Sets response to a malloc(3)ed string; caller should free. 108 */ 109 static int 110 auth_url(const char *challenge, char **response, const char *guser, 111 const char *gpass) 112 { 113 char *cp, *ep, *clear, *line, *realm, *scheme; 114 char user[BUFSIZ], *pass; 115 int rval; 116 size_t len, clen, rlen; 117 118 *response = NULL; 119 clear = realm = scheme = NULL; 120 rval = -1; 121 line = xstrdup(challenge); 122 cp = line; 123 124 if (debug) 125 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 126 127 scheme = strsep(&cp, " "); 128 #define SCHEME_BASIC "Basic" 129 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 130 warnx("Unsupported WWW Authentication challenge - `%s'", 131 challenge); 132 goto cleanup_auth_url; 133 } 134 cp += strspn(cp, " "); 135 136 #define REALM "realm=\"" 137 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 138 cp += sizeof(REALM) - 1; 139 else { 140 warnx("Unsupported WWW Authentication challenge - `%s'", 141 challenge); 142 goto cleanup_auth_url; 143 } 144 if ((ep = strchr(cp, '\"')) != NULL) { 145 size_t len = ep - cp; 146 147 realm = (char *)xmalloc(len + 1); 148 (void)strlcpy(realm, cp, len + 1); 149 } else { 150 warnx("Unsupported WWW Authentication challenge - `%s'", 151 challenge); 152 goto cleanup_auth_url; 153 } 154 155 if (guser != NULL) 156 (void)strlcpy(user, guser, sizeof(user)); 157 else { 158 fprintf(ttyout, "Username for `%s': ", realm); 159 (void)fflush(ttyout); 160 if (fgets(user, sizeof(user) - 1, stdin) == NULL) { 161 clearerr(stdin); 162 goto cleanup_auth_url; 163 } 164 user[strlen(user) - 1] = '\0'; 165 } 166 if (gpass != NULL) 167 pass = (char *)gpass; 168 else 169 pass = getpass("Password: "); 170 171 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 172 clear = (char *)xmalloc(clen); 173 (void)strlcpy(clear, user, clen); 174 (void)strlcat(clear, ":", clen); 175 (void)strlcat(clear, pass, clen); 176 if (gpass == NULL) 177 memset(pass, 0, strlen(pass)); 178 179 /* scheme + " " + enc + "\0" */ 180 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 181 *response = (char *)xmalloc(rlen); 182 (void)strlcpy(*response, scheme, rlen); 183 len = strlcat(*response, " ", rlen); 184 base64_encode(clear, clen, *response + len); 185 memset(clear, 0, clen); 186 rval = 0; 187 188 cleanup_auth_url: 189 FREEPTR(clear); 190 FREEPTR(line); 191 FREEPTR(realm); 192 return (rval); 193 } 194 195 /* 196 * Encode len bytes starting at clear using base64 encoding into encoded, 197 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 198 */ 199 static void 200 base64_encode(const char *clear, size_t len, char *encoded) 201 { 202 static const char enc[] = 203 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 204 char *cp; 205 int i; 206 207 cp = encoded; 208 for (i = 0; i < len; i += 3) { 209 *(cp++) = enc[((clear[i + 0] >> 2))]; 210 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 211 | ((clear[i + 1] >> 4) & 0x0f)]; 212 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 213 | ((clear[i + 2] >> 6) & 0x03)]; 214 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 215 } 216 *cp = '\0'; 217 while (i-- > len) 218 *(--cp) = '='; 219 } 220 221 /* 222 * Decode %xx escapes in given string, `in-place'. 223 */ 224 static void 225 url_decode(char *url) 226 { 227 unsigned char *p, *q; 228 229 if (EMPTYSTRING(url)) 230 return; 231 p = q = (unsigned char *)url; 232 233 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 234 while (*p) { 235 if (p[0] == '%' 236 && p[1] && isxdigit((unsigned char)p[1]) 237 && p[2] && isxdigit((unsigned char)p[2])) { 238 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 239 p+=3; 240 } else 241 *q++ = *p++; 242 } 243 *q = '\0'; 244 } 245 246 247 /* 248 * Parse URL of form: 249 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 250 * Returns -1 if a parse error occurred, otherwise 0. 251 * It's the caller's responsibility to url_decode() the returned 252 * user, pass and path. 253 * 254 * Sets type to url_t, each of the given char ** pointers to a 255 * malloc(3)ed strings of the relevant section, and port to 256 * the number given, or ftpport if ftp://, or httpport if http://. 257 * 258 * If <host> is surrounded by `[' and ']', it's parsed as an 259 * IPv6 address (as per RFC 2732). 260 * 261 * XXX: this is not totally RFC 1738 compliant; <path> will have the 262 * leading `/' unless it's an ftp:// URL, as this makes things easier 263 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 264 * host and the url-path removed, but any additional leading slashes 265 * in the url-path are retained (because they imply that we should 266 * later do "CWD" with a null argument). 267 * 268 * Examples: 269 * input url output path 270 * --------- ----------- 271 * "ftp://host" NULL 272 * "http://host/" NULL 273 * "file://host/dir/file" "dir/file" 274 * "ftp://host/" "" 275 * "ftp://host//" NULL 276 * "ftp://host//dir/file" "/dir/file" 277 */ 278 static int 279 parse_url(const char *url, const char *desc, url_t *type, 280 char **user, char **pass, char **host, char **port, 281 in_port_t *portnum, char **path) 282 { 283 const char *origurl; 284 char *cp, *ep, *thost, *tport; 285 size_t len; 286 287 if (url == NULL || desc == NULL || type == NULL || user == NULL 288 || pass == NULL || host == NULL || port == NULL || portnum == NULL 289 || path == NULL) 290 errx(1, "parse_url: invoked with NULL argument!"); 291 292 origurl = url; 293 *type = UNKNOWN_URL_T; 294 *user = *pass = *host = *port = *path = NULL; 295 *portnum = 0; 296 tport = NULL; 297 298 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 299 url += sizeof(HTTP_URL) - 1; 300 *type = HTTP_URL_T; 301 *portnum = HTTP_PORT; 302 tport = httpport; 303 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 304 url += sizeof(FTP_URL) - 1; 305 *type = FTP_URL_T; 306 *portnum = FTP_PORT; 307 tport = ftpport; 308 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 309 url += sizeof(FILE_URL) - 1; 310 *type = FILE_URL_T; 311 } else { 312 warnx("Invalid %s `%s'", desc, url); 313 cleanup_parse_url: 314 FREEPTR(*user); 315 FREEPTR(*pass); 316 FREEPTR(*host); 317 FREEPTR(*port); 318 FREEPTR(*path); 319 return (-1); 320 } 321 322 if (*url == '\0') 323 return (0); 324 325 /* find [user[:pass]@]host[:port] */ 326 ep = strchr(url, '/'); 327 if (ep == NULL) 328 thost = xstrdup(url); 329 else { 330 len = ep - url; 331 thost = (char *)xmalloc(len + 1); 332 (void)strlcpy(thost, url, len + 1); 333 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 334 ep++; 335 *path = xstrdup(ep); 336 } 337 338 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 339 if (cp != NULL) { 340 if (*type == FTP_URL_T) 341 anonftp = 0; /* disable anonftp */ 342 *user = thost; 343 *cp = '\0'; 344 thost = xstrdup(cp + 1); 345 cp = strchr(*user, ':'); 346 if (cp != NULL) { 347 *cp = '\0'; 348 *pass = xstrdup(cp + 1); 349 } 350 } 351 352 #ifdef INET6 353 /* 354 * Check if thost is an encoded IPv6 address, as per 355 * RFC 2732: 356 * `[' ipv6-address ']' 357 */ 358 if (*thost == '[') { 359 cp = thost + 1; 360 if ((ep = strchr(cp, ']')) == NULL || 361 (ep[1] != '\0' && ep[1] != ':')) { 362 warnx("Invalid address `%s' in %s `%s'", 363 thost, desc, origurl); 364 goto cleanup_parse_url; 365 } 366 len = ep - cp; /* change `[xyz]' -> `xyz' */ 367 memmove(thost, thost + 1, len); 368 thost[len] = '\0'; 369 if (! isipv6addr(thost)) { 370 warnx("Invalid IPv6 address `%s' in %s `%s'", 371 thost, desc, origurl); 372 goto cleanup_parse_url; 373 } 374 cp = ep + 1; 375 if (*cp == ':') 376 cp++; 377 else 378 cp = NULL; 379 } else 380 #endif /* INET6 */ 381 if ((cp = strchr(thost, ':')) != NULL) 382 *cp++ = '\0'; 383 *host = thost; 384 385 /* look for [:port] */ 386 if (cp != NULL) { 387 long nport; 388 389 nport = parseport(cp, -1); 390 if (nport == -1) { 391 warnx("Unknown port `%s' in %s `%s'", 392 cp, desc, origurl); 393 goto cleanup_parse_url; 394 } 395 *portnum = nport; 396 tport = cp; 397 } 398 399 if (tport != NULL) 400 *port = xstrdup(tport); 401 if (*path == NULL) 402 *path = xstrdup(""); 403 404 if (debug) 405 fprintf(ttyout, 406 "parse_url: user `%s' pass `%s' host %s port %s(%d) " 407 "path `%s'\n", 408 *user ? *user : "<null>", *pass ? *pass : "<null>", 409 *host ? *host : "<null>", *port ? *port : "<null>", 410 *portnum ? *portnum : -1, *path ? *path : "<null>"); 411 412 return (0); 413 } 414 415 sigjmp_buf httpabort; 416 417 /* 418 * Retrieve URL, via a proxy if necessary, using HTTP. 419 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 420 * http_proxy as appropriate. 421 * Supports HTTP redirects. 422 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 423 * is still open (e.g, ftp xfer with trailing /) 424 */ 425 static int 426 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 427 { 428 struct addrinfo hints, *res, *res0 = NULL; 429 int error; 430 char hbuf[NI_MAXHOST]; 431 volatile sigfunc oldintr, oldintp; 432 volatile int s; 433 struct stat sb; 434 int ischunked, isproxy, rval, hcode; 435 size_t len; 436 static size_t bufsize; 437 static char *xferbuf; 438 char *cp, *ep, *buf, *savefile; 439 char *auth, *location, *message; 440 char *user, *pass, *host, *port, *path, *decodedpath; 441 char *puser, *ppass; 442 off_t hashbytes, rangestart, rangeend, entitylen; 443 int (*closefunc)(FILE *); 444 FILE *fin, *fout; 445 time_t mtime; 446 url_t urltype; 447 in_port_t portnum; 448 449 oldintr = oldintp = NULL; 450 closefunc = NULL; 451 fin = fout = NULL; 452 s = -1; 453 buf = savefile = NULL; 454 auth = location = message = NULL; 455 ischunked = isproxy = hcode = 0; 456 rval = 1; 457 user = pass = host = path = decodedpath = puser = ppass = NULL; 458 459 #ifdef __GNUC__ /* shut up gcc warnings */ 460 (void)&closefunc; 461 (void)&fin; 462 (void)&fout; 463 (void)&buf; 464 (void)&savefile; 465 (void)&rval; 466 (void)&isproxy; 467 (void)&hcode; 468 (void)&ischunked; 469 (void)&message; 470 (void)&location; 471 (void)&auth; 472 (void)&decodedpath; 473 #endif 474 475 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 476 &portnum, &path) == -1) 477 goto cleanup_fetch_url; 478 479 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 480 && strcasecmp(host, "localhost") != 0) { 481 warnx("No support for non local file URL `%s'", url); 482 goto cleanup_fetch_url; 483 } 484 485 if (EMPTYSTRING(path)) { 486 if (urltype == FTP_URL_T) { 487 rval = fetch_ftp(url); 488 goto cleanup_fetch_url; 489 } 490 if (urltype != HTTP_URL_T || outfile == NULL) { 491 warnx("Invalid URL (no file after host) `%s'", url); 492 goto cleanup_fetch_url; 493 } 494 } 495 496 decodedpath = xstrdup(path); 497 url_decode(decodedpath); 498 499 if (outfile) 500 savefile = xstrdup(outfile); 501 else { 502 cp = strrchr(decodedpath, '/'); /* find savefile */ 503 if (cp != NULL) 504 savefile = xstrdup(cp + 1); 505 else 506 savefile = xstrdup(decodedpath); 507 } 508 if (EMPTYSTRING(savefile)) { 509 if (urltype == FTP_URL_T) { 510 rval = fetch_ftp(url); 511 goto cleanup_fetch_url; 512 } 513 warnx("Invalid URL (no file after directory) `%s'", url); 514 goto cleanup_fetch_url; 515 } else { 516 if (debug) 517 fprintf(ttyout, "got savefile as `%s'\n", savefile); 518 } 519 520 restart_point = 0; 521 filesize = -1; 522 rangestart = rangeend = entitylen = -1; 523 mtime = -1; 524 if (restartautofetch) { 525 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 526 stat(savefile, &sb) == 0) 527 restart_point = sb.st_size; 528 } 529 if (urltype == FILE_URL_T) { /* file:// URLs */ 530 direction = "copied"; 531 fin = fopen(decodedpath, "r"); 532 if (fin == NULL) { 533 warn("Cannot open file `%s'", decodedpath); 534 goto cleanup_fetch_url; 535 } 536 if (fstat(fileno(fin), &sb) == 0) { 537 mtime = sb.st_mtime; 538 filesize = sb.st_size; 539 } 540 if (restart_point) { 541 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 542 warn("Can't lseek to restart `%s'", 543 decodedpath); 544 goto cleanup_fetch_url; 545 } 546 } 547 if (verbose) { 548 fprintf(ttyout, "Copying %s", decodedpath); 549 if (restart_point) 550 fprintf(ttyout, " (restarting at " LLF ")", 551 (LLT)restart_point); 552 fputs("\n", ttyout); 553 } 554 } else { /* ftp:// or http:// URLs */ 555 char *leading; 556 int hasleading; 557 558 if (proxyenv == NULL) { 559 if (urltype == HTTP_URL_T) 560 proxyenv = getoptionvalue("http_proxy"); 561 else if (urltype == FTP_URL_T) 562 proxyenv = getoptionvalue("ftp_proxy"); 563 } 564 direction = "retrieved"; 565 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 566 url_t purltype; 567 char *phost, *ppath; 568 char *pport, *no_proxy; 569 570 isproxy = 1; 571 572 /* check URL against list of no_proxied sites */ 573 no_proxy = getoptionvalue("no_proxy"); 574 if (! EMPTYSTRING(no_proxy)) { 575 char *np, *np_copy; 576 long np_port; 577 size_t hlen, plen; 578 579 np_copy = xstrdup(no_proxy); 580 hlen = strlen(host); 581 while ((cp = strsep(&np_copy, " ,")) != NULL) { 582 if (*cp == '\0') 583 continue; 584 if ((np = strrchr(cp, ':')) != NULL) { 585 *np = '\0'; 586 np_port = 587 strtol(np + 1, &ep, 10); 588 if (*ep != '\0') 589 continue; 590 if (np_port != portnum) 591 continue; 592 } 593 plen = strlen(cp); 594 if (hlen < plen) 595 continue; 596 if (strncasecmp(host + hlen - plen, 597 cp, plen) == 0) { 598 isproxy = 0; 599 break; 600 } 601 } 602 FREEPTR(np_copy); 603 } 604 605 if (isproxy) { 606 if (parse_url(proxyenv, "proxy URL", &purltype, 607 &puser, &ppass, &phost, &pport, &portnum, 608 &ppath) == -1) 609 goto cleanup_fetch_url; 610 611 if ((purltype != HTTP_URL_T 612 && purltype != FTP_URL_T) || 613 EMPTYSTRING(phost) || 614 (! EMPTYSTRING(ppath) 615 && strcmp(ppath, "/") != 0)) { 616 warnx("Malformed proxy URL `%s'", 617 proxyenv); 618 FREEPTR(phost); 619 FREEPTR(pport); 620 FREEPTR(ppath); 621 goto cleanup_fetch_url; 622 } 623 if (isipv6addr(host) && 624 strchr(host, '%') != NULL) { 625 warnx( 626 "Scoped address notation `%s' disallowed via web proxy", 627 host); 628 FREEPTR(phost); 629 FREEPTR(pport); 630 FREEPTR(ppath); 631 goto cleanup_fetch_url; 632 } 633 634 FREEPTR(host); 635 host = phost; 636 FREEPTR(port); 637 port = pport; 638 FREEPTR(path); 639 path = xstrdup(url); 640 FREEPTR(ppath); 641 } 642 } /* ! EMPTYSTRING(proxyenv) */ 643 644 memset(&hints, 0, sizeof(hints)); 645 hints.ai_flags = 0; 646 hints.ai_family = AF_UNSPEC; 647 hints.ai_socktype = SOCK_STREAM; 648 hints.ai_protocol = 0; 649 error = getaddrinfo(host, NULL, &hints, &res0); 650 if (error) { 651 warnx("%s", gai_strerror(error)); 652 goto cleanup_fetch_url; 653 } 654 if (res0->ai_canonname) 655 host = res0->ai_canonname; 656 657 s = -1; 658 for (res = res0; res; res = res->ai_next) { 659 /* 660 * see comment in hookup() 661 */ 662 ai_unmapped(res); 663 if (getnameinfo(res->ai_addr, res->ai_addrlen, 664 hbuf, sizeof(hbuf), NULL, 0, 665 NI_NUMERICHOST) != 0) 666 strncpy(hbuf, "invalid", sizeof(hbuf)); 667 668 if (verbose && res != res0) 669 fprintf(ttyout, "Trying %s...\n", hbuf); 670 671 ((struct sockaddr_in *)res->ai_addr)->sin_port = 672 htons(portnum); 673 s = socket(res->ai_family, SOCK_STREAM, 674 res->ai_protocol); 675 if (s < 0) { 676 warn("Can't create socket"); 677 continue; 678 } 679 680 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 681 warn("Connect to address `%s'", hbuf); 682 close(s); 683 s = -1; 684 continue; 685 } 686 687 /* success */ 688 break; 689 } 690 freeaddrinfo(res0); 691 692 if (s < 0) { 693 warn("Can't connect to %s", host); 694 goto cleanup_fetch_url; 695 } 696 697 fin = fdopen(s, "r+"); 698 /* 699 * Construct and send the request. 700 */ 701 if (verbose) 702 fprintf(ttyout, "Requesting %s\n", url); 703 leading = " ("; 704 hasleading = 0; 705 if (isproxy) { 706 if (verbose) { 707 fprintf(ttyout, "%svia %s:%s", leading, 708 host, port); 709 leading = ", "; 710 hasleading++; 711 } 712 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 713 if (flushcache) 714 fprintf(fin, "Pragma: no-cache\r\n"); 715 } else { 716 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 717 if (strchr(host, ':')) { 718 char *h, *p; 719 720 /* 721 * strip off IPv6 scope identifier, since it is 722 * local to the node 723 */ 724 h = xstrdup(host); 725 if (isipv6addr(h) && 726 (p = strchr(h, '%')) != NULL) { 727 *p = '\0'; 728 } 729 fprintf(fin, "Host: [%s]:%d\r\n", h, portnum); 730 free(h); 731 } else 732 fprintf(fin, "Host: %s:%d\r\n", host, portnum); 733 fprintf(fin, "Accept: */*\r\n"); 734 fprintf(fin, "Connection: close\r\n"); 735 if (restart_point) { 736 fputs(leading, ttyout); 737 fprintf(fin, "Range: bytes=" LLF "-\r\n", 738 (LLT)restart_point); 739 fprintf(ttyout, "restarting at " LLF, 740 (LLT)restart_point); 741 leading = ", "; 742 hasleading++; 743 } 744 if (flushcache) 745 fprintf(fin, "Cache-Control: no-cache\r\n"); 746 } 747 fprintf(fin, "User-Agent: %s/%s\r\n", FTP_PRODUCT, FTP_VERSION); 748 if (wwwauth) { 749 if (verbose) { 750 fprintf(ttyout, "%swith authorization", 751 leading); 752 leading = ", "; 753 hasleading++; 754 } 755 fprintf(fin, "Authorization: %s\r\n", wwwauth); 756 } 757 if (proxyauth) { 758 if (verbose) { 759 fprintf(ttyout, 760 "%swith proxy authorization", leading); 761 leading = ", "; 762 hasleading++; 763 } 764 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 765 } 766 if (verbose && hasleading) 767 fputs(")\n", ttyout); 768 fprintf(fin, "\r\n"); 769 if (fflush(fin) == EOF) { 770 warn("Writing HTTP request"); 771 goto cleanup_fetch_url; 772 } 773 774 /* Read the response */ 775 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 776 warn("Receiving HTTP reply"); 777 goto cleanup_fetch_url; 778 } 779 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 780 buf[--len] = '\0'; 781 if (debug) 782 fprintf(ttyout, "received `%s'\n", buf); 783 784 /* Determine HTTP response code */ 785 cp = strchr(buf, ' '); 786 if (cp == NULL) 787 goto improper; 788 else 789 cp++; 790 hcode = strtol(cp, &ep, 10); 791 if (*ep != '\0' && !isspace((unsigned char)*ep)) 792 goto improper; 793 message = xstrdup(cp); 794 795 /* Read the rest of the header. */ 796 FREEPTR(buf); 797 while (1) { 798 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 799 == NULL) { 800 warn("Receiving HTTP reply"); 801 goto cleanup_fetch_url; 802 } 803 while (len > 0 && 804 (buf[len-1] == '\r' || buf[len-1] == '\n')) 805 buf[--len] = '\0'; 806 if (len == 0) 807 break; 808 if (debug) 809 fprintf(ttyout, "received `%s'\n", buf); 810 811 /* Look for some headers */ 812 cp = buf; 813 814 #define CONTENTLEN "Content-Length: " 815 if (strncasecmp(cp, CONTENTLEN, 816 sizeof(CONTENTLEN) - 1) == 0) { 817 cp += sizeof(CONTENTLEN) - 1; 818 filesize = STRTOLL(cp, &ep, 10); 819 if (filesize < 0 || *ep != '\0') 820 goto improper; 821 if (debug) 822 fprintf(ttyout, 823 "parsed len as: " LLF "\n", 824 (LLT)filesize); 825 826 #define CONTENTRANGE "Content-Range: bytes " 827 } else if (strncasecmp(cp, CONTENTRANGE, 828 sizeof(CONTENTRANGE) - 1) == 0) { 829 cp += sizeof(CONTENTRANGE) - 1; 830 rangestart = STRTOLL(cp, &ep, 10); 831 if (rangestart < 0 || *ep != '-') 832 goto improper; 833 cp = ep + 1; 834 rangeend = STRTOLL(cp, &ep, 10); 835 if (rangeend < 0 || *ep != '/' || 836 rangeend < rangestart) 837 goto improper; 838 cp = ep + 1; 839 entitylen = STRTOLL(cp, &ep, 10); 840 if (entitylen < 0 || *ep != '\0') 841 goto improper; 842 843 if (debug) 844 fprintf(ttyout, 845 "parsed range as: " 846 LLF "-" LLF "/" LLF "\n", 847 (LLT)rangestart, 848 (LLT)rangeend, 849 (LLT)entitylen); 850 if (! restart_point) { 851 warnx( 852 "Received unexpected Content-Range header"); 853 goto cleanup_fetch_url; 854 } 855 856 #define LASTMOD "Last-Modified: " 857 } else if (strncasecmp(cp, LASTMOD, 858 sizeof(LASTMOD) - 1) == 0) { 859 struct tm parsed; 860 char *t; 861 862 cp += sizeof(LASTMOD) - 1; 863 /* RFC 1123 */ 864 if ((t = strptime(cp, 865 "%a, %d %b %Y %H:%M:%S GMT", 866 &parsed)) 867 /* RFC 850 */ 868 || (t = strptime(cp, 869 "%a, %d-%b-%y %H:%M:%S GMT", 870 &parsed)) 871 /* asctime */ 872 || (t = strptime(cp, 873 "%a, %b %d %H:%M:%S %Y", 874 &parsed))) { 875 parsed.tm_isdst = -1; 876 if (*t == '\0') 877 mtime = timegm(&parsed); 878 if (debug && mtime != -1) { 879 fprintf(ttyout, 880 "parsed date as: %s", 881 ctime(&mtime)); 882 } 883 } 884 885 #define LOCATION "Location: " 886 } else if (strncasecmp(cp, LOCATION, 887 sizeof(LOCATION) - 1) == 0) { 888 cp += sizeof(LOCATION) - 1; 889 location = xstrdup(cp); 890 if (debug) 891 fprintf(ttyout, 892 "parsed location as: %s\n", cp); 893 894 #define TRANSENC "Transfer-Encoding: " 895 } else if (strncasecmp(cp, TRANSENC, 896 sizeof(TRANSENC) - 1) == 0) { 897 cp += sizeof(TRANSENC) - 1; 898 if (strcasecmp(cp, "binary") == 0) { 899 warnx( 900 "Bogus transfer encoding - `%s' (fetching anyway)", 901 cp); 902 continue; 903 } 904 if (strcasecmp(cp, "chunked") != 0) { 905 warnx( 906 "Unsupported transfer encoding - `%s'", 907 cp); 908 goto cleanup_fetch_url; 909 } 910 ischunked++; 911 if (debug) 912 fprintf(ttyout, 913 "using chunked encoding\n"); 914 915 #define PROXYAUTH "Proxy-Authenticate: " 916 } else if (strncasecmp(cp, PROXYAUTH, 917 sizeof(PROXYAUTH) - 1) == 0) { 918 cp += sizeof(PROXYAUTH) - 1; 919 FREEPTR(auth); 920 auth = xstrdup(cp); 921 if (debug) 922 fprintf(ttyout, 923 "parsed proxy-auth as: %s\n", cp); 924 925 #define WWWAUTH "WWW-Authenticate: " 926 } else if (strncasecmp(cp, WWWAUTH, 927 sizeof(WWWAUTH) - 1) == 0) { 928 cp += sizeof(WWWAUTH) - 1; 929 FREEPTR(auth); 930 auth = xstrdup(cp); 931 if (debug) 932 fprintf(ttyout, 933 "parsed www-auth as: %s\n", cp); 934 935 } 936 937 } 938 /* finished parsing header */ 939 FREEPTR(buf); 940 941 switch (hcode) { 942 case 200: 943 break; 944 case 206: 945 if (! restart_point) { 946 warnx("Not expecting partial content header"); 947 goto cleanup_fetch_url; 948 } 949 break; 950 case 300: 951 case 301: 952 case 302: 953 case 303: 954 case 305: 955 if (EMPTYSTRING(location)) { 956 warnx( 957 "No redirection Location provided by server"); 958 goto cleanup_fetch_url; 959 } 960 if (redirect_loop++ > 5) { 961 warnx("Too many redirections requested"); 962 goto cleanup_fetch_url; 963 } 964 if (hcode == 305) { 965 if (verbose) 966 fprintf(ttyout, "Redirected via %s\n", 967 location); 968 rval = fetch_url(url, location, 969 proxyauth, wwwauth); 970 } else { 971 if (verbose) 972 fprintf(ttyout, "Redirected to %s\n", 973 location); 974 rval = go_fetch(location); 975 } 976 goto cleanup_fetch_url; 977 case 401: 978 case 407: 979 { 980 char **authp; 981 char *auser, *apass; 982 983 fprintf(ttyout, "%s\n", message); 984 if (EMPTYSTRING(auth)) { 985 warnx( 986 "No authentication challenge provided by server"); 987 goto cleanup_fetch_url; 988 } 989 if (hcode == 401) { 990 authp = &wwwauth; 991 auser = user; 992 apass = pass; 993 } else { 994 authp = &proxyauth; 995 auser = puser; 996 apass = ppass; 997 } 998 if (*authp != NULL) { 999 char reply[10]; 1000 1001 fprintf(ttyout, 1002 "Authorization failed. Retry (y/n)? "); 1003 if (fgets(reply, sizeof(reply), stdin) 1004 == NULL) { 1005 clearerr(stdin); 1006 goto cleanup_fetch_url; 1007 } else { 1008 if (tolower(reply[0]) != 'y') 1009 goto cleanup_fetch_url; 1010 } 1011 auser = NULL; 1012 apass = NULL; 1013 } 1014 if (auth_url(auth, authp, auser, apass) == 0) { 1015 rval = fetch_url(url, proxyenv, 1016 proxyauth, wwwauth); 1017 memset(*authp, 0, strlen(*authp)); 1018 FREEPTR(*authp); 1019 } 1020 goto cleanup_fetch_url; 1021 } 1022 default: 1023 if (message) 1024 warnx("Error retrieving file - `%s'", message); 1025 else 1026 warnx("Unknown error retrieving file"); 1027 goto cleanup_fetch_url; 1028 } 1029 } /* end of ftp:// or http:// specific setup */ 1030 1031 /* Open the output file. */ 1032 if (strcmp(savefile, "-") == 0) { 1033 fout = stdout; 1034 } else if (*savefile == '|') { 1035 oldintp = xsignal(SIGPIPE, SIG_IGN); 1036 fout = popen(savefile + 1, "w"); 1037 if (fout == NULL) { 1038 warn("Can't run `%s'", savefile + 1); 1039 goto cleanup_fetch_url; 1040 } 1041 closefunc = pclose; 1042 } else { 1043 if (restart_point){ 1044 if (entitylen != -1) 1045 filesize = entitylen; 1046 if (rangestart != -1 && rangestart != restart_point) { 1047 warnx( 1048 "Size of `%s' differs from save file `%s'", 1049 url, savefile); 1050 goto cleanup_fetch_url; 1051 } 1052 fout = fopen(savefile, "a"); 1053 } else 1054 fout = fopen(savefile, "w"); 1055 if (fout == NULL) { 1056 warn("Can't open `%s'", savefile); 1057 goto cleanup_fetch_url; 1058 } 1059 closefunc = fclose; 1060 } 1061 1062 /* Trap signals */ 1063 if (sigsetjmp(httpabort, 1)) 1064 goto cleanup_fetch_url; 1065 (void)xsignal(SIGQUIT, psummary); 1066 oldintr = xsignal(SIGINT, aborthttp); 1067 1068 if (rcvbuf_size > bufsize) { 1069 if (xferbuf) 1070 (void)free(xferbuf); 1071 bufsize = rcvbuf_size; 1072 xferbuf = xmalloc(bufsize); 1073 } 1074 1075 bytes = 0; 1076 hashbytes = mark; 1077 progressmeter(-1); 1078 1079 /* Finally, suck down the file. */ 1080 do { 1081 long chunksize; 1082 1083 chunksize = 0; 1084 /* read chunksize */ 1085 if (ischunked) { 1086 if (fgets(xferbuf, bufsize, fin) == NULL) { 1087 warnx("Unexpected EOF reading chunksize"); 1088 goto cleanup_fetch_url; 1089 } 1090 chunksize = strtol(xferbuf, &ep, 16); 1091 1092 /* 1093 * XXX: Work around bug in Apache 1.3.9 and 1094 * 1.3.11, which incorrectly put trailing 1095 * space after the chunksize. 1096 */ 1097 while (*ep == ' ') 1098 ep++; 1099 1100 if (strcmp(ep, "\r\n") != 0) { 1101 warnx("Unexpected data following chunksize"); 1102 goto cleanup_fetch_url; 1103 } 1104 if (debug) 1105 fprintf(ttyout, "got chunksize of " LLF "\n", 1106 (LLT)chunksize); 1107 if (chunksize == 0) 1108 break; 1109 } 1110 /* transfer file or chunk */ 1111 while (1) { 1112 struct timeval then, now, td; 1113 off_t bufrem; 1114 1115 if (rate_get) 1116 (void)gettimeofday(&then, NULL); 1117 bufrem = rate_get ? rate_get : bufsize; 1118 if (ischunked) 1119 bufrem = MIN(chunksize, bufrem); 1120 while (bufrem > 0) { 1121 len = fread(xferbuf, sizeof(char), 1122 MIN(bufsize, bufrem), fin); 1123 if (len <= 0) 1124 goto chunkdone; 1125 bytes += len; 1126 bufrem -= len; 1127 if (fwrite(xferbuf, sizeof(char), len, fout) 1128 != len) { 1129 warn("Writing `%s'", savefile); 1130 goto cleanup_fetch_url; 1131 } 1132 if (hash && !progress) { 1133 while (bytes >= hashbytes) { 1134 (void)putc('#', ttyout); 1135 hashbytes += mark; 1136 } 1137 (void)fflush(ttyout); 1138 } 1139 if (ischunked) { 1140 chunksize -= len; 1141 if (chunksize <= 0) 1142 break; 1143 } 1144 } 1145 if (rate_get) { 1146 while (1) { 1147 (void)gettimeofday(&now, NULL); 1148 timersub(&now, &then, &td); 1149 if (td.tv_sec > 0) 1150 break; 1151 usleep(1000000 - td.tv_usec); 1152 } 1153 } 1154 if (ischunked && chunksize <= 0) 1155 break; 1156 } 1157 /* read CRLF after chunk*/ 1158 chunkdone: 1159 if (ischunked) { 1160 if (fgets(xferbuf, bufsize, fin) == NULL) 1161 break; 1162 if (strcmp(xferbuf, "\r\n") != 0) { 1163 warnx("Unexpected data following chunk"); 1164 goto cleanup_fetch_url; 1165 } 1166 } 1167 } while (ischunked); 1168 if (hash && !progress && bytes > 0) { 1169 if (bytes < mark) 1170 (void)putc('#', ttyout); 1171 (void)putc('\n', ttyout); 1172 } 1173 if (ferror(fin)) { 1174 warn("Reading file"); 1175 goto cleanup_fetch_url; 1176 } 1177 progressmeter(1); 1178 bytes = 0; 1179 (void)fflush(fout); 1180 if (closefunc == fclose && mtime != -1) { 1181 struct timeval tval[2]; 1182 1183 (void)gettimeofday(&tval[0], NULL); 1184 tval[1].tv_sec = mtime; 1185 tval[1].tv_usec = 0; 1186 (*closefunc)(fout); 1187 fout = NULL; 1188 1189 if (utimes(savefile, tval) == -1) { 1190 fprintf(ttyout, 1191 "Can't change modification time to %s", 1192 asctime(localtime(&mtime))); 1193 } 1194 } 1195 if (bytes > 0) 1196 ptransfer(0); 1197 1198 rval = 0; 1199 goto cleanup_fetch_url; 1200 1201 improper: 1202 warnx("Improper response from `%s'", host); 1203 1204 cleanup_fetch_url: 1205 if (oldintr) 1206 (void)xsignal(SIGINT, oldintr); 1207 if (oldintp) 1208 (void)xsignal(SIGPIPE, oldintp); 1209 if (fin != NULL) 1210 fclose(fin); 1211 else if (s != -1) 1212 close(s); 1213 if (closefunc != NULL && fout != NULL) 1214 (*closefunc)(fout); 1215 FREEPTR(savefile); 1216 FREEPTR(user); 1217 FREEPTR(pass); 1218 FREEPTR(host); 1219 FREEPTR(port); 1220 FREEPTR(path); 1221 FREEPTR(decodedpath); 1222 FREEPTR(puser); 1223 FREEPTR(ppass); 1224 FREEPTR(buf); 1225 FREEPTR(auth); 1226 FREEPTR(location); 1227 FREEPTR(message); 1228 return (rval); 1229 } 1230 1231 /* 1232 * Abort a HTTP retrieval 1233 */ 1234 void 1235 aborthttp(int notused) 1236 { 1237 char msgbuf[100]; 1238 int len; 1239 1240 alarmtimer(0); 1241 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1242 write(fileno(ttyout), msgbuf, len); 1243 siglongjmp(httpabort, 1); 1244 } 1245 1246 /* 1247 * Retrieve ftp URL or classic ftp argument using FTP. 1248 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1249 * is still open (e.g, ftp xfer with trailing /) 1250 */ 1251 static int 1252 fetch_ftp(const char *url) 1253 { 1254 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1255 char *host, *path, *dir, *file, *user, *pass; 1256 char *port; 1257 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1258 in_port_t portnum; 1259 url_t urltype; 1260 1261 host = path = dir = file = user = pass = NULL; 1262 port = NULL; 1263 rval = 1; 1264 type = TYPE_I; 1265 1266 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1267 if ((parse_url(url, "URL", &urltype, &user, &pass, 1268 &host, &port, &portnum, &path) == -1) || 1269 (user != NULL && *user == '\0') || 1270 (pass != NULL && *pass == '\0') || 1271 EMPTYSTRING(host)) { 1272 warnx("Invalid URL `%s'", url); 1273 goto cleanup_fetch_ftp; 1274 } 1275 url_decode(user); 1276 url_decode(pass); 1277 /* 1278 * Note: Don't url_decode(path) here. We need to keep the 1279 * distinction between "/" and "%2F" until later. 1280 */ 1281 1282 /* check for trailing ';type=[aid]' */ 1283 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1284 if (strcasecmp(cp, ";type=a") == 0) 1285 type = TYPE_A; 1286 else if (strcasecmp(cp, ";type=i") == 0) 1287 type = TYPE_I; 1288 else if (strcasecmp(cp, ";type=d") == 0) { 1289 warnx( 1290 "Directory listing via a URL is not supported"); 1291 goto cleanup_fetch_ftp; 1292 } else { 1293 warnx("Invalid suffix `%s' in URL `%s'", cp, 1294 url); 1295 goto cleanup_fetch_ftp; 1296 } 1297 *cp = 0; 1298 } 1299 } else { /* classic style `[user@]host:[file]' */ 1300 urltype = CLASSIC_URL_T; 1301 host = xstrdup(url); 1302 cp = strchr(host, '@'); 1303 if (cp != NULL) { 1304 *cp = '\0'; 1305 user = host; 1306 anonftp = 0; /* disable anonftp */ 1307 host = xstrdup(cp + 1); 1308 } 1309 cp = strchr(host, ':'); 1310 if (cp != NULL) { 1311 *cp = '\0'; 1312 path = xstrdup(cp + 1); 1313 } 1314 } 1315 if (EMPTYSTRING(host)) 1316 goto cleanup_fetch_ftp; 1317 1318 /* Extract the file and (if present) directory name. */ 1319 dir = path; 1320 if (! EMPTYSTRING(dir)) { 1321 /* 1322 * If we are dealing with classic `[user@]host:[path]' syntax, 1323 * then a path of the form `/file' (resulting from input of the 1324 * form `host:/file') means that we should do "CWD /" before 1325 * retrieving the file. So we set dir="/" and file="file". 1326 * 1327 * But if we are dealing with URLs like `ftp://host/path' then 1328 * a path of the form `/file' (resulting from a URL of the form 1329 * `ftp://host//file') means that we should do `CWD ' (with an 1330 * empty argument) before retrieving the file. So we set 1331 * dir="" and file="file". 1332 * 1333 * If the path does not contain / at all, we set dir=NULL. 1334 * (We get a path without any slashes if we are dealing with 1335 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1336 * 1337 * In all other cases, we set dir to a string that does not 1338 * include the final '/' that separates the dir part from the 1339 * file part of the path. (This will be the empty string if 1340 * and only if we are dealing with a path of the form `/file' 1341 * resulting from an URL of the form `ftp://host//file'.) 1342 */ 1343 cp = strrchr(dir, '/'); 1344 if (cp == dir && urltype == CLASSIC_URL_T) { 1345 file = cp + 1; 1346 dir = "/"; 1347 } else if (cp != NULL) { 1348 *cp++ = '\0'; 1349 file = cp; 1350 } else { 1351 file = dir; 1352 dir = NULL; 1353 } 1354 } else 1355 dir = NULL; 1356 if (urltype == FTP_URL_T && file != NULL) { 1357 url_decode(file); 1358 /* but still don't url_decode(dir) */ 1359 } 1360 if (debug) 1361 fprintf(ttyout, 1362 "fetch_ftp: user `%s' pass `%s' host %s port %s " 1363 "path `%s' dir `%s' file `%s'\n", 1364 user ? user : "<null>", pass ? pass : "<null>", 1365 host ? host : "<null>", port ? port : "<null>", 1366 path ? path : "<null>", 1367 dir ? dir : "<null>", file ? file : "<null>"); 1368 1369 dirhasglob = filehasglob = 0; 1370 if (doglob && urltype == CLASSIC_URL_T) { 1371 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1372 dirhasglob = 1; 1373 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1374 filehasglob = 1; 1375 } 1376 1377 /* Set up the connection */ 1378 if (connected) 1379 disconnect(0, NULL); 1380 xargv[0] = __progname; 1381 xargv[1] = host; 1382 xargv[2] = NULL; 1383 xargc = 2; 1384 if (port) { 1385 xargv[2] = port; 1386 xargv[3] = NULL; 1387 xargc = 3; 1388 } 1389 oautologin = autologin; 1390 /* don't autologin in setpeer(), use ftp_login() below */ 1391 autologin = 0; 1392 setpeer(xargc, xargv); 1393 autologin = oautologin; 1394 if ((connected == 0) || 1395 (connected == 1 && !ftp_login(host, user, pass))) { 1396 warnx("Can't connect or login to host `%s'", host); 1397 goto cleanup_fetch_ftp; 1398 } 1399 1400 switch (type) { 1401 case TYPE_A: 1402 setascii(1, xargv); 1403 break; 1404 case TYPE_I: 1405 setbinary(1, xargv); 1406 break; 1407 default: 1408 errx(1, "fetch_ftp: unknown transfer type %d", type); 1409 } 1410 1411 /* 1412 * Change directories, if necessary. 1413 * 1414 * Note: don't use EMPTYSTRING(dir) below, because 1415 * dir=="" means something different from dir==NULL. 1416 */ 1417 if (dir != NULL && !dirhasglob) { 1418 char *nextpart; 1419 1420 /* 1421 * If we are dealing with a classic `[user@]host:[path]' 1422 * (urltype is CLASSIC_URL_T) then we have a raw directory 1423 * name (not encoded in any way) and we can change 1424 * directories in one step. 1425 * 1426 * If we are dealing with an `ftp://host/path' URL 1427 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1428 * send a separate CWD command for each unescaped "/" 1429 * in the path, and we have to interpret %hex escaping 1430 * *after* we find the slashes. It's possible to get 1431 * empty components here, (from multiple adjacent 1432 * slashes in the path) and RFC 1738 says that we should 1433 * still do `CWD ' (with a null argument) in such cases. 1434 * 1435 * Many ftp servers don't support `CWD ', so if there's an 1436 * error performing that command, bail out with a descriptive 1437 * message. 1438 * 1439 * Examples: 1440 * 1441 * host: dir="", urltype=CLASSIC_URL_T 1442 * logged in (to default directory) 1443 * host:file dir=NULL, urltype=CLASSIC_URL_T 1444 * "RETR file" 1445 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1446 * "CWD dir", logged in 1447 * ftp://host/ dir="", urltype=FTP_URL_T 1448 * logged in (to default directory) 1449 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1450 * "CWD dir", logged in 1451 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1452 * "RETR file" 1453 * ftp://host//file dir="", urltype=FTP_URL_T 1454 * "CWD ", "RETR file" 1455 * host:/file dir="/", urltype=CLASSIC_URL_T 1456 * "CWD /", "RETR file" 1457 * ftp://host///file dir="/", urltype=FTP_URL_T 1458 * "CWD ", "CWD ", "RETR file" 1459 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1460 * "CWD /", "RETR file" 1461 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1462 * "CWD foo", "RETR file" 1463 * ftp://host/foo/bar/file dir="foo/bar" 1464 * "CWD foo", "CWD bar", "RETR file" 1465 * ftp://host//foo/bar/file dir="/foo/bar" 1466 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1467 * ftp://host/foo//bar/file dir="foo//bar" 1468 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1469 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1470 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1471 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1472 * "CWD /foo", "CWD bar", "RETR file" 1473 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1474 * "CWD /foo/bar", "RETR file" 1475 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1476 * "RETR /foo/bar/file" 1477 * 1478 * Note that we don't need `dir' after this point. 1479 */ 1480 do { 1481 if (urltype == FTP_URL_T) { 1482 nextpart = strchr(dir, '/'); 1483 if (nextpart) { 1484 *nextpart = '\0'; 1485 nextpart++; 1486 } 1487 url_decode(dir); 1488 } else 1489 nextpart = NULL; 1490 if (debug) 1491 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1492 dir ? dir : "<null>", 1493 nextpart ? nextpart : "<null>"); 1494 if (urltype == FTP_URL_T || *dir != '\0') { 1495 xargv[0] = "cd"; 1496 xargv[1] = dir; 1497 xargv[2] = NULL; 1498 dirchange = 0; 1499 cd(2, xargv); 1500 if (! dirchange) { 1501 if (*dir == '\0' && code == 500) 1502 fprintf(stderr, 1503 "\n" 1504 "ftp: The `CWD ' command (without a directory), which is required by\n" 1505 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1506 " conflicts with the server's conformance to RFC 959.\n" 1507 " Try the same URL without the `//' in the URL pathname.\n" 1508 "\n"); 1509 goto cleanup_fetch_ftp; 1510 } 1511 } 1512 dir = nextpart; 1513 } while (dir != NULL); 1514 } 1515 1516 if (EMPTYSTRING(file)) { 1517 rval = -1; 1518 goto cleanup_fetch_ftp; 1519 } 1520 1521 if (dirhasglob) { 1522 (void)strlcpy(rempath, dir, sizeof(rempath)); 1523 (void)strlcat(rempath, "/", sizeof(rempath)); 1524 (void)strlcat(rempath, file, sizeof(rempath)); 1525 file = rempath; 1526 } 1527 1528 /* Fetch the file(s). */ 1529 xargc = 2; 1530 xargv[0] = "get"; 1531 xargv[1] = file; 1532 xargv[2] = NULL; 1533 if (dirhasglob || filehasglob) { 1534 int ointeractive; 1535 1536 ointeractive = interactive; 1537 interactive = 0; 1538 xargv[0] = "mget"; 1539 mget(xargc, xargv); 1540 interactive = ointeractive; 1541 } else { 1542 if (outfile == NULL) { 1543 cp = strrchr(file, '/'); /* find savefile */ 1544 if (cp != NULL) 1545 outfile = cp + 1; 1546 else 1547 outfile = file; 1548 } 1549 xargv[2] = (char *)outfile; 1550 xargv[3] = NULL; 1551 xargc++; 1552 if (restartautofetch) 1553 reget(xargc, xargv); 1554 else 1555 get(xargc, xargv); 1556 } 1557 1558 if ((code / 100) == COMPLETE) 1559 rval = 0; 1560 1561 cleanup_fetch_ftp: 1562 FREEPTR(host); 1563 FREEPTR(path); 1564 FREEPTR(user); 1565 FREEPTR(pass); 1566 return (rval); 1567 } 1568 1569 /* 1570 * Retrieve the given file to outfile. 1571 * Supports arguments of the form: 1572 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1573 * call fetch_ftp() 1574 * "http://host/path" call fetch_url() to use HTTP 1575 * "file:///path" call fetch_url() to copy 1576 * "about:..." print a message 1577 * 1578 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1579 * is still open (e.g, ftp xfer with trailing /) 1580 */ 1581 static int 1582 go_fetch(const char *url) 1583 { 1584 char *proxy; 1585 1586 /* 1587 * Check for about:* 1588 */ 1589 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1590 url += sizeof(ABOUT_URL) -1; 1591 if (strcasecmp(url, "ftp") == 0) { 1592 fputs( 1593 "This version of ftp has been enhanced by Luke Mewburn <lukem@netbsd.org>\n" 1594 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1595 } else if (strcasecmp(url, "lukem") == 0) { 1596 fputs( 1597 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1598 "Please email feedback to <lukem@netbsd.org>.\n", ttyout); 1599 } else if (strcasecmp(url, "netbsd") == 0) { 1600 fputs( 1601 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1602 "For more information, see http://www.netbsd.org/index.html\n", ttyout); 1603 } else if (strcasecmp(url, "version") == 0) { 1604 fprintf(ttyout, "Version: %s %s%s\n", 1605 FTP_PRODUCT, FTP_VERSION, 1606 #ifdef INET6 1607 "" 1608 #else 1609 " (-IPv6)" 1610 #endif 1611 ); 1612 } else { 1613 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1614 } 1615 fputs("\n", ttyout); 1616 return (0); 1617 } 1618 1619 /* 1620 * Check for file:// and http:// URLs. 1621 */ 1622 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1623 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1624 return (fetch_url(url, NULL, NULL, NULL)); 1625 1626 /* 1627 * Try FTP URL-style and host:file arguments next. 1628 * If ftpproxy is set with an FTP URL, use fetch_url() 1629 * Othewise, use fetch_ftp(). 1630 */ 1631 proxy = getoptionvalue("ftp_proxy"); 1632 if (!EMPTYSTRING(proxy) && 1633 strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1634 return (fetch_url(url, NULL, NULL, NULL)); 1635 1636 return (fetch_ftp(url)); 1637 } 1638 1639 /* 1640 * Retrieve multiple files from the command line, 1641 * calling go_fetch() for each file. 1642 * 1643 * If an ftp path has a trailing "/", the path will be cd-ed into and 1644 * the connection remains open, and the function will return -1 1645 * (to indicate the connection is alive). 1646 * If an error occurs the return value will be the offset+1 in 1647 * argv[] of the file that caused a problem (i.e, argv[x] 1648 * returns x+1) 1649 * Otherwise, 0 is returned if all files retrieved successfully. 1650 */ 1651 int 1652 auto_fetch(int argc, char *argv[]) 1653 { 1654 volatile int argpos; 1655 int rval; 1656 1657 argpos = 0; 1658 1659 if (sigsetjmp(toplevel, 1)) { 1660 if (connected) 1661 disconnect(0, NULL); 1662 return (argpos + 1); 1663 } 1664 (void)xsignal(SIGINT, intr); 1665 (void)xsignal(SIGPIPE, lostpeer); 1666 1667 /* 1668 * Loop through as long as there's files to fetch. 1669 */ 1670 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1671 if (strchr(argv[argpos], ':') == NULL) 1672 break; 1673 redirect_loop = 0; 1674 if (!anonftp) 1675 anonftp = 2; /* Handle "automatic" transfers. */ 1676 rval = go_fetch(argv[argpos]); 1677 if (outfile != NULL && strcmp(outfile, "-") != 0 1678 && outfile[0] != '|') 1679 outfile = NULL; 1680 if (rval > 0) 1681 rval = argpos + 1; 1682 } 1683 1684 if (connected && rval != -1) 1685 disconnect(0, NULL); 1686 return (rval); 1687 } 1688 1689 1690 int 1691 auto_put(int argc, char **argv, const char *uploadserver) 1692 { 1693 char *uargv[4], *path, *pathsep; 1694 int uargc, rval, len; 1695 1696 uargc = 0; 1697 uargv[uargc++] = "mput"; 1698 uargv[uargc++] = argv[0]; 1699 uargv[2] = uargv[3] = NULL; 1700 pathsep = NULL; 1701 rval = 1; 1702 1703 if (debug) 1704 fprintf(ttyout, "auto_put: target `%s'\n", uploadserver); 1705 1706 path = xstrdup(uploadserver); 1707 len = strlen(path); 1708 if (path[len - 1] != '/' && path[len - 1] != ':') { 1709 /* 1710 * make sure we always pass a directory to auto_fetch 1711 */ 1712 if (argc > 1) { /* more than one file to upload */ 1713 int len; 1714 1715 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1716 free(path); 1717 path = (char *)xmalloc(len); 1718 (void)strlcpy(path, uploadserver, len); 1719 (void)strlcat(path, "/", len); 1720 } else { /* single file to upload */ 1721 uargv[0] = "put"; 1722 pathsep = strrchr(path, '/'); 1723 if (pathsep == NULL) { 1724 pathsep = strrchr(path, ':'); 1725 if (pathsep == NULL) { 1726 warnx("Invalid URL `%s'", path); 1727 goto cleanup_auto_put; 1728 } 1729 pathsep++; 1730 uargv[2] = xstrdup(pathsep); 1731 pathsep[0] = '/'; 1732 } else 1733 uargv[2] = xstrdup(pathsep + 1); 1734 pathsep[1] = '\0'; 1735 uargc++; 1736 } 1737 } 1738 if (debug) 1739 fprintf(ttyout, "auto_put: url `%s' argv[2] `%s'\n", 1740 path, uargv[2] ? uargv[2] : "<null>"); 1741 1742 /* connect and cwd */ 1743 rval = auto_fetch(1, &path); 1744 free(path); 1745 if(rval >= 0) 1746 goto cleanup_auto_put; 1747 1748 /* XXX : is this the best way? */ 1749 if (uargc == 3) { 1750 uargv[1] = argv[0]; 1751 put(uargc, uargv); 1752 goto cleanup_auto_put; 1753 } 1754 1755 for(; argv[0] != NULL; argv++) { 1756 uargv[1] = argv[0]; 1757 mput(uargc, uargv); 1758 } 1759 rval = 0; 1760 1761 cleanup_auto_put: 1762 FREEPTR(uargv[2]); 1763 return (rval); 1764 } 1765