1 /* $NetBSD: fetch.c,v 1.137 2002/11/30 03:10:55 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2002 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 1.137 2002/11/30 03:10:55 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 73 #include "ftp_var.h" 74 #include "version.h" 75 76 typedef enum { 77 UNKNOWN_URL_T=-1, 78 HTTP_URL_T, 79 FTP_URL_T, 80 FILE_URL_T, 81 CLASSIC_URL_T 82 } url_t; 83 84 void aborthttp(int); 85 static int auth_url(const char *, char **, const char *, const char *); 86 static void base64_encode(const u_char *, size_t, u_char *); 87 static int go_fetch(const char *); 88 static int fetch_ftp(const char *); 89 static int fetch_url(const char *, const char *, char *, char *); 90 static int parse_url(const char *, const char *, url_t *, char **, 91 char **, char **, char **, in_port_t *, char **); 92 static void url_decode(char *); 93 94 static int redirect_loop; 95 96 97 #define ABOUT_URL "about:" /* propaganda */ 98 #define FILE_URL "file://" /* file URL prefix */ 99 #define FTP_URL "ftp://" /* ftp URL prefix */ 100 #define HTTP_URL "http://" /* http URL prefix */ 101 102 103 /* 104 * Generate authorization response based on given authentication challenge. 105 * Returns -1 if an error occurred, otherwise 0. 106 * Sets response to a malloc(3)ed string; caller should free. 107 */ 108 static int 109 auth_url(const char *challenge, char **response, const char *guser, 110 const char *gpass) 111 { 112 char *cp, *ep, *clear, *line, *realm, *scheme; 113 char user[BUFSIZ], *pass; 114 int rval; 115 size_t len, clen, rlen; 116 117 *response = NULL; 118 clear = realm = scheme = NULL; 119 rval = -1; 120 line = xstrdup(challenge); 121 cp = line; 122 123 if (debug) 124 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 125 126 scheme = strsep(&cp, " "); 127 #define SCHEME_BASIC "Basic" 128 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 129 warnx("Unsupported WWW Authentication challenge - `%s'", 130 challenge); 131 goto cleanup_auth_url; 132 } 133 cp += strspn(cp, " "); 134 135 #define REALM "realm=\"" 136 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 137 cp += sizeof(REALM) - 1; 138 else { 139 warnx("Unsupported WWW Authentication challenge - `%s'", 140 challenge); 141 goto cleanup_auth_url; 142 } 143 if ((ep = strchr(cp, '\"')) != NULL) { 144 size_t len = ep - cp; 145 146 realm = (char *)xmalloc(len + 1); 147 (void)strlcpy(realm, cp, len + 1); 148 } else { 149 warnx("Unsupported WWW Authentication challenge - `%s'", 150 challenge); 151 goto cleanup_auth_url; 152 } 153 154 if (guser != NULL) 155 (void)strlcpy(user, guser, sizeof(user)); 156 else { 157 fprintf(ttyout, "Username for `%s': ", realm); 158 (void)fflush(ttyout); 159 if (fgets(user, sizeof(user) - 1, stdin) == NULL) { 160 clearerr(stdin); 161 goto cleanup_auth_url; 162 } 163 user[strlen(user) - 1] = '\0'; 164 } 165 if (gpass != NULL) 166 pass = (char *)gpass; 167 else 168 pass = getpass("Password: "); 169 170 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 171 clear = (char *)xmalloc(clen); 172 (void)strlcpy(clear, user, clen); 173 (void)strlcat(clear, ":", clen); 174 (void)strlcat(clear, pass, clen); 175 if (gpass == NULL) 176 memset(pass, 0, strlen(pass)); 177 178 /* scheme + " " + enc + "\0" */ 179 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 180 *response = (char *)xmalloc(rlen); 181 (void)strlcpy(*response, scheme, rlen); 182 len = strlcat(*response, " ", rlen); 183 base64_encode(clear, clen, *response + len); 184 memset(clear, 0, clen); 185 rval = 0; 186 187 cleanup_auth_url: 188 FREEPTR(clear); 189 FREEPTR(line); 190 FREEPTR(realm); 191 return (rval); 192 } 193 194 /* 195 * Encode len bytes starting at clear using base64 encoding into encoded, 196 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 197 */ 198 static void 199 base64_encode(const u_char *clear, size_t len, u_char *encoded) 200 { 201 static const u_char enc[] = 202 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 203 u_char *cp; 204 int i; 205 206 cp = encoded; 207 for (i = 0; i < len; i += 3) { 208 *(cp++) = enc[((clear[i + 0] >> 2))]; 209 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 210 | ((clear[i + 1] >> 4) & 0x0f)]; 211 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 212 | ((clear[i + 2] >> 6) & 0x03)]; 213 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 214 } 215 *cp = '\0'; 216 while (i-- > len) 217 *(--cp) = '='; 218 } 219 220 /* 221 * Decode %xx escapes in given string, `in-place'. 222 */ 223 static void 224 url_decode(char *url) 225 { 226 unsigned char *p, *q; 227 228 if (EMPTYSTRING(url)) 229 return; 230 p = q = (unsigned char *)url; 231 232 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 233 while (*p) { 234 if (p[0] == '%' 235 && p[1] && isxdigit((unsigned char)p[1]) 236 && p[2] && isxdigit((unsigned char)p[2])) { 237 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 238 p+=3; 239 } else 240 *q++ = *p++; 241 } 242 *q = '\0'; 243 } 244 245 246 /* 247 * Parse URL of form: 248 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 249 * Returns -1 if a parse error occurred, otherwise 0. 250 * It's the caller's responsibility to url_decode() the returned 251 * user, pass and path. 252 * 253 * Sets type to url_t, each of the given char ** pointers to a 254 * malloc(3)ed strings of the relevant section, and port to 255 * the number given, or ftpport if ftp://, or httpport if http://. 256 * 257 * If <host> is surrounded by `[' and ']', it's parsed as an 258 * IPv6 address (as per RFC 2732). 259 * 260 * XXX: this is not totally RFC 1738 compliant; <path> will have the 261 * leading `/' unless it's an ftp:// URL, as this makes things easier 262 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 263 * host and the url-path removed, but any additional leading slashes 264 * in the url-path are retained (because they imply that we should 265 * later do "CWD" with a null argument). 266 * 267 * Examples: 268 * input url output path 269 * --------- ----------- 270 * "ftp://host" NULL 271 * "http://host/" NULL 272 * "file://host/dir/file" "dir/file" 273 * "ftp://host/" "" 274 * "ftp://host//" NULL 275 * "ftp://host//dir/file" "/dir/file" 276 */ 277 static int 278 parse_url(const char *url, const char *desc, url_t *type, 279 char **user, char **pass, char **host, char **port, 280 in_port_t *portnum, char **path) 281 { 282 const char *origurl; 283 char *cp, *ep, *thost, *tport; 284 size_t len; 285 286 if (url == NULL || desc == NULL || type == NULL || user == NULL 287 || pass == NULL || host == NULL || port == NULL || portnum == NULL 288 || path == NULL) 289 errx(1, "parse_url: invoked with NULL argument!"); 290 291 origurl = url; 292 *type = UNKNOWN_URL_T; 293 *user = *pass = *host = *port = *path = NULL; 294 *portnum = 0; 295 tport = NULL; 296 297 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 298 url += sizeof(HTTP_URL) - 1; 299 *type = HTTP_URL_T; 300 *portnum = HTTP_PORT; 301 tport = httpport; 302 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 303 url += sizeof(FTP_URL) - 1; 304 *type = FTP_URL_T; 305 *portnum = FTP_PORT; 306 tport = ftpport; 307 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 308 url += sizeof(FILE_URL) - 1; 309 *type = FILE_URL_T; 310 } else { 311 warnx("Invalid %s `%s'", desc, url); 312 cleanup_parse_url: 313 FREEPTR(*user); 314 FREEPTR(*pass); 315 FREEPTR(*host); 316 FREEPTR(*port); 317 FREEPTR(*path); 318 return (-1); 319 } 320 321 if (*url == '\0') 322 return (0); 323 324 /* find [user[:pass]@]host[:port] */ 325 ep = strchr(url, '/'); 326 if (ep == NULL) 327 thost = xstrdup(url); 328 else { 329 len = ep - url; 330 thost = (char *)xmalloc(len + 1); 331 (void)strlcpy(thost, url, len + 1); 332 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 333 ep++; 334 *path = xstrdup(ep); 335 } 336 337 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 338 if (cp != NULL) { 339 if (*type == FTP_URL_T) 340 anonftp = 0; /* disable anonftp */ 341 *user = thost; 342 *cp = '\0'; 343 thost = xstrdup(cp + 1); 344 cp = strchr(*user, ':'); 345 if (cp != NULL) { 346 *cp = '\0'; 347 *pass = xstrdup(cp + 1); 348 } 349 } 350 351 #ifdef INET6 352 /* 353 * Check if thost is an encoded IPv6 address, as per 354 * RFC 2732: 355 * `[' ipv6-address ']' 356 */ 357 if (*thost == '[') { 358 cp = thost + 1; 359 if ((ep = strchr(cp, ']')) == NULL || 360 (ep[1] != '\0' && ep[1] != ':')) { 361 warnx("Invalid address `%s' in %s `%s'", 362 thost, desc, origurl); 363 goto cleanup_parse_url; 364 } 365 len = ep - cp; /* change `[xyz]' -> `xyz' */ 366 memmove(thost, thost + 1, len); 367 thost[len] = '\0'; 368 if (! isipv6addr(thost)) { 369 warnx("Invalid IPv6 address `%s' in %s `%s'", 370 thost, desc, origurl); 371 goto cleanup_parse_url; 372 } 373 cp = ep + 1; 374 if (*cp == ':') 375 cp++; 376 else 377 cp = NULL; 378 } else 379 #endif /* INET6 */ 380 if ((cp = strchr(thost, ':')) != NULL) 381 *cp++ = '\0'; 382 *host = thost; 383 384 /* look for [:port] */ 385 if (cp != NULL) { 386 long nport; 387 388 nport = parseport(cp, -1); 389 if (nport == -1) { 390 warnx("Unknown port `%s' in %s `%s'", 391 cp, desc, origurl); 392 goto cleanup_parse_url; 393 } 394 *portnum = nport; 395 tport = cp; 396 } 397 398 if (tport != NULL) 399 *port = xstrdup(tport); 400 if (*path == NULL) 401 *path = xstrdup("/"); 402 403 if (debug) 404 fprintf(ttyout, 405 "parse_url: user `%s' pass `%s' host %s port %s(%d) " 406 "path `%s'\n", 407 *user ? *user : "<null>", *pass ? *pass : "<null>", 408 *host ? *host : "<null>", *port ? *port : "<null>", 409 *portnum ? *portnum : -1, *path ? *path : "<null>"); 410 411 return (0); 412 } 413 414 sigjmp_buf httpabort; 415 416 /* 417 * Retrieve URL, via a proxy if necessary, using HTTP. 418 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 419 * http_proxy as appropriate. 420 * Supports HTTP redirects. 421 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 422 * is still open (e.g, ftp xfer with trailing /) 423 */ 424 static int 425 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 426 { 427 struct addrinfo hints, *res, *res0 = NULL; 428 int error; 429 char hbuf[NI_MAXHOST]; 430 volatile sigfunc oldintr, oldintp; 431 volatile int s; 432 struct stat sb; 433 int ischunked, isproxy, rval, hcode; 434 size_t len; 435 static size_t bufsize; 436 static char *xferbuf; 437 char *cp, *ep, *buf, *savefile; 438 char *auth, *location, *message; 439 char *user, *pass, *host, *port, *path, *decodedpath; 440 char *puser, *ppass; 441 off_t hashbytes, rangestart, rangeend, entitylen; 442 int (*closefunc)(FILE *); 443 FILE *fin, *fout; 444 time_t mtime; 445 url_t urltype; 446 in_port_t portnum; 447 448 oldintr = oldintp = NULL; 449 closefunc = NULL; 450 fin = fout = NULL; 451 s = -1; 452 buf = savefile = NULL; 453 auth = location = message = NULL; 454 ischunked = isproxy = hcode = 0; 455 rval = 1; 456 user = pass = host = path = decodedpath = puser = ppass = NULL; 457 458 #ifdef __GNUC__ /* shut up gcc warnings */ 459 (void)&closefunc; 460 (void)&fin; 461 (void)&fout; 462 (void)&buf; 463 (void)&savefile; 464 (void)&rval; 465 (void)&isproxy; 466 (void)&hcode; 467 (void)&ischunked; 468 (void)&message; 469 (void)&location; 470 (void)&auth; 471 (void)&decodedpath; 472 #endif 473 474 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 475 &portnum, &path) == -1) 476 goto cleanup_fetch_url; 477 478 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 479 && strcasecmp(host, "localhost") != 0) { 480 warnx("No support for non local file URL `%s'", url); 481 goto cleanup_fetch_url; 482 } 483 484 if (EMPTYSTRING(path)) { 485 if (urltype == FTP_URL_T) { 486 rval = fetch_ftp(url); 487 goto cleanup_fetch_url; 488 } 489 if (urltype != HTTP_URL_T || outfile == NULL) { 490 warnx("Invalid URL (no file after host) `%s'", url); 491 goto cleanup_fetch_url; 492 } 493 } 494 495 decodedpath = xstrdup(path); 496 url_decode(decodedpath); 497 498 if (outfile) 499 savefile = xstrdup(outfile); 500 else { 501 cp = strrchr(decodedpath, '/'); /* find savefile */ 502 if (cp != NULL) 503 savefile = xstrdup(cp + 1); 504 else 505 savefile = xstrdup(decodedpath); 506 } 507 if (EMPTYSTRING(savefile)) { 508 if (urltype == FTP_URL_T) { 509 rval = fetch_ftp(url); 510 goto cleanup_fetch_url; 511 } 512 warnx("Invalid URL (no file after directory) `%s'", url); 513 goto cleanup_fetch_url; 514 } else { 515 if (debug) 516 fprintf(ttyout, "got savefile as `%s'\n", savefile); 517 } 518 519 restart_point = 0; 520 filesize = -1; 521 rangestart = rangeend = entitylen = -1; 522 mtime = -1; 523 if (restartautofetch) { 524 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 525 stat(savefile, &sb) == 0) 526 restart_point = sb.st_size; 527 } 528 if (urltype == FILE_URL_T) { /* file:// URLs */ 529 direction = "copied"; 530 fin = fopen(decodedpath, "r"); 531 if (fin == NULL) { 532 warn("Cannot open file `%s'", decodedpath); 533 goto cleanup_fetch_url; 534 } 535 if (fstat(fileno(fin), &sb) == 0) { 536 mtime = sb.st_mtime; 537 filesize = sb.st_size; 538 } 539 if (restart_point) { 540 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 541 warn("Can't lseek to restart `%s'", 542 decodedpath); 543 goto cleanup_fetch_url; 544 } 545 } 546 if (verbose) { 547 fprintf(ttyout, "Copying %s", decodedpath); 548 if (restart_point) 549 fprintf(ttyout, " (restarting at " LLF ")", 550 (LLT)restart_point); 551 fputs("\n", ttyout); 552 } 553 } else { /* ftp:// or http:// URLs */ 554 char *leading; 555 int hasleading; 556 557 if (proxyenv == NULL) { 558 if (urltype == HTTP_URL_T) 559 proxyenv = getoptionvalue("http_proxy"); 560 else if (urltype == FTP_URL_T) 561 proxyenv = getoptionvalue("ftp_proxy"); 562 } 563 direction = "retrieved"; 564 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 565 url_t purltype; 566 char *phost, *ppath; 567 char *pport, *no_proxy; 568 569 isproxy = 1; 570 571 /* check URL against list of no_proxied sites */ 572 no_proxy = getoptionvalue("no_proxy"); 573 if (! EMPTYSTRING(no_proxy)) { 574 char *np, *np_copy; 575 long np_port; 576 size_t hlen, plen; 577 578 np_copy = xstrdup(no_proxy); 579 hlen = strlen(host); 580 while ((cp = strsep(&np_copy, " ,")) != NULL) { 581 if (*cp == '\0') 582 continue; 583 if ((np = strrchr(cp, ':')) != NULL) { 584 *np = '\0'; 585 np_port = 586 strtol(np + 1, &ep, 10); 587 if (*ep != '\0') 588 continue; 589 if (np_port != portnum) 590 continue; 591 } 592 plen = strlen(cp); 593 if (hlen < plen) 594 continue; 595 if (strncasecmp(host + hlen - plen, 596 cp, plen) == 0) { 597 isproxy = 0; 598 break; 599 } 600 } 601 FREEPTR(np_copy); 602 if (isproxy == 0 && urltype == FTP_URL_T) { 603 rval = fetch_ftp(url); 604 goto cleanup_fetch_url; 605 } 606 } 607 608 if (isproxy) { 609 if (parse_url(proxyenv, "proxy URL", &purltype, 610 &puser, &ppass, &phost, &pport, &portnum, 611 &ppath) == -1) 612 goto cleanup_fetch_url; 613 614 if ((purltype != HTTP_URL_T 615 && purltype != FTP_URL_T) || 616 EMPTYSTRING(phost) || 617 (! EMPTYSTRING(ppath) 618 && strcmp(ppath, "/") != 0)) { 619 warnx("Malformed proxy URL `%s'", 620 proxyenv); 621 FREEPTR(phost); 622 FREEPTR(pport); 623 FREEPTR(ppath); 624 goto cleanup_fetch_url; 625 } 626 if (isipv6addr(host) && 627 strchr(host, '%') != NULL) { 628 warnx( 629 "Scoped address notation `%s' disallowed via web proxy", 630 host); 631 FREEPTR(phost); 632 FREEPTR(pport); 633 FREEPTR(ppath); 634 goto cleanup_fetch_url; 635 } 636 637 FREEPTR(host); 638 host = phost; 639 FREEPTR(port); 640 port = pport; 641 FREEPTR(path); 642 path = xstrdup(url); 643 FREEPTR(ppath); 644 } 645 } /* ! EMPTYSTRING(proxyenv) */ 646 647 memset(&hints, 0, sizeof(hints)); 648 hints.ai_flags = 0; 649 hints.ai_family = family; 650 hints.ai_socktype = SOCK_STREAM; 651 hints.ai_protocol = 0; 652 error = getaddrinfo(host, NULL, &hints, &res0); 653 if (error) { 654 warnx("%s", gai_strerror(error)); 655 goto cleanup_fetch_url; 656 } 657 if (res0->ai_canonname) 658 host = res0->ai_canonname; 659 660 s = -1; 661 for (res = res0; res; res = res->ai_next) { 662 /* 663 * see comment in hookup() 664 */ 665 ai_unmapped(res); 666 if (getnameinfo(res->ai_addr, res->ai_addrlen, 667 hbuf, sizeof(hbuf), NULL, 0, 668 NI_NUMERICHOST) != 0) 669 strncpy(hbuf, "invalid", sizeof(hbuf)); 670 671 if (verbose && res != res0) 672 fprintf(ttyout, "Trying %s...\n", hbuf); 673 674 ((struct sockaddr_in *)res->ai_addr)->sin_port = 675 htons(portnum); 676 s = socket(res->ai_family, SOCK_STREAM, 677 res->ai_protocol); 678 if (s < 0) { 679 warn("Can't create socket"); 680 continue; 681 } 682 683 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 684 warn("Connect to address `%s'", hbuf); 685 close(s); 686 s = -1; 687 continue; 688 } 689 690 /* success */ 691 break; 692 } 693 freeaddrinfo(res0); 694 695 if (s < 0) { 696 warn("Can't connect to %s", host); 697 goto cleanup_fetch_url; 698 } 699 700 fin = fdopen(s, "r+"); 701 /* 702 * Construct and send the request. 703 */ 704 if (verbose) 705 fprintf(ttyout, "Requesting %s\n", url); 706 leading = " ("; 707 hasleading = 0; 708 if (isproxy) { 709 if (verbose) { 710 fprintf(ttyout, "%svia %s:%s", leading, 711 host, port); 712 leading = ", "; 713 hasleading++; 714 } 715 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 716 if (flushcache) 717 fprintf(fin, "Pragma: no-cache\r\n"); 718 } else { 719 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 720 if (strchr(host, ':')) { 721 char *h, *p; 722 723 /* 724 * strip off IPv6 scope identifier, since it is 725 * local to the node 726 */ 727 h = xstrdup(host); 728 if (isipv6addr(h) && 729 (p = strchr(h, '%')) != NULL) { 730 *p = '\0'; 731 } 732 fprintf(fin, "Host: [%s]", h); 733 free(h); 734 } else 735 fprintf(fin, "Host: %s", host); 736 if (portnum != HTTP_PORT) 737 fprintf(fin, ":%u", portnum); 738 fprintf(fin, "\r\n"); 739 fprintf(fin, "Accept: */*\r\n"); 740 fprintf(fin, "Connection: close\r\n"); 741 if (restart_point) { 742 fputs(leading, ttyout); 743 fprintf(fin, "Range: bytes=" LLF "-\r\n", 744 (LLT)restart_point); 745 fprintf(ttyout, "restarting at " LLF, 746 (LLT)restart_point); 747 leading = ", "; 748 hasleading++; 749 } 750 if (flushcache) 751 fprintf(fin, "Cache-Control: no-cache\r\n"); 752 } 753 fprintf(fin, "User-Agent: %s/%s\r\n", FTP_PRODUCT, FTP_VERSION); 754 if (wwwauth) { 755 if (verbose) { 756 fprintf(ttyout, "%swith authorization", 757 leading); 758 leading = ", "; 759 hasleading++; 760 } 761 fprintf(fin, "Authorization: %s\r\n", wwwauth); 762 } 763 if (proxyauth) { 764 if (verbose) { 765 fprintf(ttyout, 766 "%swith proxy authorization", leading); 767 leading = ", "; 768 hasleading++; 769 } 770 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 771 } 772 if (verbose && hasleading) 773 fputs(")\n", ttyout); 774 fprintf(fin, "\r\n"); 775 if (fflush(fin) == EOF) { 776 warn("Writing HTTP request"); 777 goto cleanup_fetch_url; 778 } 779 780 /* Read the response */ 781 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 782 warn("Receiving HTTP reply"); 783 goto cleanup_fetch_url; 784 } 785 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 786 buf[--len] = '\0'; 787 if (debug) 788 fprintf(ttyout, "received `%s'\n", buf); 789 790 /* Determine HTTP response code */ 791 cp = strchr(buf, ' '); 792 if (cp == NULL) 793 goto improper; 794 else 795 cp++; 796 hcode = strtol(cp, &ep, 10); 797 if (*ep != '\0' && !isspace((unsigned char)*ep)) 798 goto improper; 799 message = xstrdup(cp); 800 801 /* Read the rest of the header. */ 802 FREEPTR(buf); 803 while (1) { 804 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 805 == NULL) { 806 warn("Receiving HTTP reply"); 807 goto cleanup_fetch_url; 808 } 809 while (len > 0 && 810 (buf[len-1] == '\r' || buf[len-1] == '\n')) 811 buf[--len] = '\0'; 812 if (len == 0) 813 break; 814 if (debug) 815 fprintf(ttyout, "received `%s'\n", buf); 816 817 /* Look for some headers */ 818 cp = buf; 819 820 #define CONTENTLEN "Content-Length: " 821 if (strncasecmp(cp, CONTENTLEN, 822 sizeof(CONTENTLEN) - 1) == 0) { 823 cp += sizeof(CONTENTLEN) - 1; 824 filesize = STRTOLL(cp, &ep, 10); 825 if (filesize < 0 || *ep != '\0') 826 goto improper; 827 if (debug) 828 fprintf(ttyout, 829 "parsed len as: " LLF "\n", 830 (LLT)filesize); 831 832 #define CONTENTRANGE "Content-Range: bytes " 833 } else if (strncasecmp(cp, CONTENTRANGE, 834 sizeof(CONTENTRANGE) - 1) == 0) { 835 cp += sizeof(CONTENTRANGE) - 1; 836 if (*cp == '*') { 837 ep = cp + 1; 838 } 839 else { 840 rangestart = STRTOLL(cp, &ep, 10); 841 if (rangestart < 0 || *ep != '-') 842 goto improper; 843 cp = ep + 1; 844 rangeend = STRTOLL(cp, &ep, 10); 845 if (rangeend < 0 || rangeend < rangestart) 846 goto improper; 847 } 848 if (*ep != '/') 849 goto improper; 850 cp = ep + 1; 851 if (*cp == '*') { 852 ep = cp + 1; 853 } 854 else { 855 entitylen = STRTOLL(cp, &ep, 10); 856 if (entitylen < 0) 857 goto improper; 858 } 859 if (*ep != '\0') 860 goto improper; 861 862 if (debug) { 863 fprintf(ttyout, "parsed range as: "); 864 if (rangestart == -1) 865 fprintf(ttyout, "*"); 866 else 867 fprintf(ttyout, LLF "-" LLF, 868 (LLT)rangestart, 869 (LLT)rangeend); 870 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 871 } 872 if (! restart_point) { 873 warnx( 874 "Received unexpected Content-Range header"); 875 goto cleanup_fetch_url; 876 } 877 878 #define LASTMOD "Last-Modified: " 879 } else if (strncasecmp(cp, LASTMOD, 880 sizeof(LASTMOD) - 1) == 0) { 881 struct tm parsed; 882 char *t; 883 884 cp += sizeof(LASTMOD) - 1; 885 /* RFC 1123 */ 886 if ((t = strptime(cp, 887 "%a, %d %b %Y %H:%M:%S GMT", 888 &parsed)) 889 /* RFC 850 */ 890 || (t = strptime(cp, 891 "%a, %d-%b-%y %H:%M:%S GMT", 892 &parsed)) 893 /* asctime */ 894 || (t = strptime(cp, 895 "%a, %b %d %H:%M:%S %Y", 896 &parsed))) { 897 parsed.tm_isdst = -1; 898 if (*t == '\0') 899 mtime = timegm(&parsed); 900 if (debug && mtime != -1) { 901 fprintf(ttyout, 902 "parsed date as: %s", 903 ctime(&mtime)); 904 } 905 } 906 907 #define LOCATION "Location: " 908 } else if (strncasecmp(cp, LOCATION, 909 sizeof(LOCATION) - 1) == 0) { 910 cp += sizeof(LOCATION) - 1; 911 location = xstrdup(cp); 912 if (debug) 913 fprintf(ttyout, 914 "parsed location as: %s\n", cp); 915 916 #define TRANSENC "Transfer-Encoding: " 917 } else if (strncasecmp(cp, TRANSENC, 918 sizeof(TRANSENC) - 1) == 0) { 919 cp += sizeof(TRANSENC) - 1; 920 if (strcasecmp(cp, "binary") == 0) { 921 warnx( 922 "Bogus transfer encoding - `%s' (fetching anyway)", 923 cp); 924 continue; 925 } 926 if (strcasecmp(cp, "chunked") != 0) { 927 warnx( 928 "Unsupported transfer encoding - `%s'", 929 cp); 930 goto cleanup_fetch_url; 931 } 932 ischunked++; 933 if (debug) 934 fprintf(ttyout, 935 "using chunked encoding\n"); 936 937 #define PROXYAUTH "Proxy-Authenticate: " 938 } else if (strncasecmp(cp, PROXYAUTH, 939 sizeof(PROXYAUTH) - 1) == 0) { 940 cp += sizeof(PROXYAUTH) - 1; 941 FREEPTR(auth); 942 auth = xstrdup(cp); 943 if (debug) 944 fprintf(ttyout, 945 "parsed proxy-auth as: %s\n", cp); 946 947 #define WWWAUTH "WWW-Authenticate: " 948 } else if (strncasecmp(cp, WWWAUTH, 949 sizeof(WWWAUTH) - 1) == 0) { 950 cp += sizeof(WWWAUTH) - 1; 951 FREEPTR(auth); 952 auth = xstrdup(cp); 953 if (debug) 954 fprintf(ttyout, 955 "parsed www-auth as: %s\n", cp); 956 957 } 958 959 } 960 /* finished parsing header */ 961 FREEPTR(buf); 962 963 switch (hcode) { 964 case 200: 965 break; 966 case 206: 967 if (! restart_point) { 968 warnx("Not expecting partial content header"); 969 goto cleanup_fetch_url; 970 } 971 break; 972 case 300: 973 case 301: 974 case 302: 975 case 303: 976 case 305: 977 if (EMPTYSTRING(location)) { 978 warnx( 979 "No redirection Location provided by server"); 980 goto cleanup_fetch_url; 981 } 982 if (redirect_loop++ > 5) { 983 warnx("Too many redirections requested"); 984 goto cleanup_fetch_url; 985 } 986 if (hcode == 305) { 987 if (verbose) 988 fprintf(ttyout, "Redirected via %s\n", 989 location); 990 rval = fetch_url(url, location, 991 proxyauth, wwwauth); 992 } else { 993 if (verbose) 994 fprintf(ttyout, "Redirected to %s\n", 995 location); 996 rval = go_fetch(location); 997 } 998 goto cleanup_fetch_url; 999 case 401: 1000 case 407: 1001 { 1002 char **authp; 1003 char *auser, *apass; 1004 1005 fprintf(ttyout, "%s\n", message); 1006 if (EMPTYSTRING(auth)) { 1007 warnx( 1008 "No authentication challenge provided by server"); 1009 goto cleanup_fetch_url; 1010 } 1011 if (hcode == 401) { 1012 authp = &wwwauth; 1013 auser = user; 1014 apass = pass; 1015 } else { 1016 authp = &proxyauth; 1017 auser = puser; 1018 apass = ppass; 1019 } 1020 if (*authp != NULL) { 1021 char reply[10]; 1022 1023 fprintf(ttyout, 1024 "Authorization failed. Retry (y/n)? "); 1025 if (fgets(reply, sizeof(reply), stdin) 1026 == NULL) { 1027 clearerr(stdin); 1028 goto cleanup_fetch_url; 1029 } else { 1030 if (tolower(reply[0]) != 'y') 1031 goto cleanup_fetch_url; 1032 } 1033 auser = NULL; 1034 apass = NULL; 1035 } 1036 if (auth_url(auth, authp, auser, apass) == 0) { 1037 rval = fetch_url(url, proxyenv, 1038 proxyauth, wwwauth); 1039 memset(*authp, 0, strlen(*authp)); 1040 FREEPTR(*authp); 1041 } 1042 goto cleanup_fetch_url; 1043 } 1044 default: 1045 if (message) 1046 warnx("Error retrieving file - `%s'", message); 1047 else 1048 warnx("Unknown error retrieving file"); 1049 goto cleanup_fetch_url; 1050 } 1051 } /* end of ftp:// or http:// specific setup */ 1052 1053 /* Open the output file. */ 1054 if (strcmp(savefile, "-") == 0) { 1055 fout = stdout; 1056 } else if (*savefile == '|') { 1057 oldintp = xsignal(SIGPIPE, SIG_IGN); 1058 fout = popen(savefile + 1, "w"); 1059 if (fout == NULL) { 1060 warn("Can't run `%s'", savefile + 1); 1061 goto cleanup_fetch_url; 1062 } 1063 closefunc = pclose; 1064 } else { 1065 if ((rangeend != -1 && rangeend <= restart_point) || 1066 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1067 /* already done */ 1068 if (verbose) 1069 fprintf(ttyout, "already done\n"); 1070 rval = 0; 1071 goto cleanup_fetch_url; 1072 } 1073 if (restart_point && rangestart != -1) { 1074 if (entitylen != -1) 1075 filesize = entitylen; 1076 if (rangestart != restart_point) { 1077 warnx( 1078 "Size of `%s' differs from save file `%s'", 1079 url, savefile); 1080 goto cleanup_fetch_url; 1081 } 1082 fout = fopen(savefile, "a"); 1083 } else 1084 fout = fopen(savefile, "w"); 1085 if (fout == NULL) { 1086 warn("Can't open `%s'", savefile); 1087 goto cleanup_fetch_url; 1088 } 1089 closefunc = fclose; 1090 } 1091 1092 /* Trap signals */ 1093 if (sigsetjmp(httpabort, 1)) 1094 goto cleanup_fetch_url; 1095 (void)xsignal(SIGQUIT, psummary); 1096 oldintr = xsignal(SIGINT, aborthttp); 1097 1098 if (rcvbuf_size > bufsize) { 1099 if (xferbuf) 1100 (void)free(xferbuf); 1101 bufsize = rcvbuf_size; 1102 xferbuf = xmalloc(bufsize); 1103 } 1104 1105 bytes = 0; 1106 hashbytes = mark; 1107 progressmeter(-1); 1108 1109 /* Finally, suck down the file. */ 1110 do { 1111 long chunksize; 1112 1113 chunksize = 0; 1114 /* read chunksize */ 1115 if (ischunked) { 1116 if (fgets(xferbuf, bufsize, fin) == NULL) { 1117 warnx("Unexpected EOF reading chunksize"); 1118 goto cleanup_fetch_url; 1119 } 1120 chunksize = strtol(xferbuf, &ep, 16); 1121 1122 /* 1123 * XXX: Work around bug in Apache 1.3.9 and 1124 * 1.3.11, which incorrectly put trailing 1125 * space after the chunksize. 1126 */ 1127 while (*ep == ' ') 1128 ep++; 1129 1130 if (strcmp(ep, "\r\n") != 0) { 1131 warnx("Unexpected data following chunksize"); 1132 goto cleanup_fetch_url; 1133 } 1134 if (debug) 1135 fprintf(ttyout, "got chunksize of " LLF "\n", 1136 (LLT)chunksize); 1137 if (chunksize == 0) 1138 break; 1139 } 1140 /* transfer file or chunk */ 1141 while (1) { 1142 struct timeval then, now, td; 1143 off_t bufrem; 1144 1145 if (rate_get) 1146 (void)gettimeofday(&then, NULL); 1147 bufrem = rate_get ? rate_get : bufsize; 1148 if (ischunked) 1149 bufrem = MIN(chunksize, bufrem); 1150 while (bufrem > 0) { 1151 len = fread(xferbuf, sizeof(char), 1152 MIN(bufsize, bufrem), fin); 1153 if (len <= 0) 1154 goto chunkdone; 1155 bytes += len; 1156 bufrem -= len; 1157 if (fwrite(xferbuf, sizeof(char), len, fout) 1158 != len) { 1159 warn("Writing `%s'", savefile); 1160 goto cleanup_fetch_url; 1161 } 1162 if (hash && !progress) { 1163 while (bytes >= hashbytes) { 1164 (void)putc('#', ttyout); 1165 hashbytes += mark; 1166 } 1167 (void)fflush(ttyout); 1168 } 1169 if (ischunked) { 1170 chunksize -= len; 1171 if (chunksize <= 0) 1172 break; 1173 } 1174 } 1175 if (rate_get) { 1176 while (1) { 1177 (void)gettimeofday(&now, NULL); 1178 timersub(&now, &then, &td); 1179 if (td.tv_sec > 0) 1180 break; 1181 usleep(1000000 - td.tv_usec); 1182 } 1183 } 1184 if (ischunked && chunksize <= 0) 1185 break; 1186 } 1187 /* read CRLF after chunk*/ 1188 chunkdone: 1189 if (ischunked) { 1190 if (fgets(xferbuf, bufsize, fin) == NULL) 1191 break; 1192 if (strcmp(xferbuf, "\r\n") != 0) { 1193 warnx("Unexpected data following chunk"); 1194 goto cleanup_fetch_url; 1195 } 1196 } 1197 } while (ischunked); 1198 if (hash && !progress && bytes > 0) { 1199 if (bytes < mark) 1200 (void)putc('#', ttyout); 1201 (void)putc('\n', ttyout); 1202 } 1203 if (ferror(fin)) { 1204 warn("Reading file"); 1205 goto cleanup_fetch_url; 1206 } 1207 progressmeter(1); 1208 (void)fflush(fout); 1209 if (closefunc == fclose && mtime != -1) { 1210 struct timeval tval[2]; 1211 1212 (void)gettimeofday(&tval[0], NULL); 1213 tval[1].tv_sec = mtime; 1214 tval[1].tv_usec = 0; 1215 (*closefunc)(fout); 1216 fout = NULL; 1217 1218 if (utimes(savefile, tval) == -1) { 1219 fprintf(ttyout, 1220 "Can't change modification time to %s", 1221 asctime(localtime(&mtime))); 1222 } 1223 } 1224 if (bytes > 0) 1225 ptransfer(0); 1226 bytes = 0; 1227 1228 rval = 0; 1229 goto cleanup_fetch_url; 1230 1231 improper: 1232 warnx("Improper response from `%s'", host); 1233 1234 cleanup_fetch_url: 1235 if (oldintr) 1236 (void)xsignal(SIGINT, oldintr); 1237 if (oldintp) 1238 (void)xsignal(SIGPIPE, oldintp); 1239 if (fin != NULL) 1240 fclose(fin); 1241 else if (s != -1) 1242 close(s); 1243 if (closefunc != NULL && fout != NULL) 1244 (*closefunc)(fout); 1245 FREEPTR(savefile); 1246 FREEPTR(user); 1247 FREEPTR(pass); 1248 FREEPTR(host); 1249 FREEPTR(port); 1250 FREEPTR(path); 1251 FREEPTR(decodedpath); 1252 FREEPTR(puser); 1253 FREEPTR(ppass); 1254 FREEPTR(buf); 1255 FREEPTR(auth); 1256 FREEPTR(location); 1257 FREEPTR(message); 1258 return (rval); 1259 } 1260 1261 /* 1262 * Abort a HTTP retrieval 1263 */ 1264 void 1265 aborthttp(int notused) 1266 { 1267 char msgbuf[100]; 1268 int len; 1269 1270 alarmtimer(0); 1271 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1272 write(fileno(ttyout), msgbuf, len); 1273 siglongjmp(httpabort, 1); 1274 } 1275 1276 /* 1277 * Retrieve ftp URL or classic ftp argument using FTP. 1278 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1279 * is still open (e.g, ftp xfer with trailing /) 1280 */ 1281 static int 1282 fetch_ftp(const char *url) 1283 { 1284 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1285 char *host, *path, *dir, *file, *user, *pass; 1286 char *port; 1287 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1288 in_port_t portnum; 1289 url_t urltype; 1290 1291 host = path = dir = file = user = pass = NULL; 1292 port = NULL; 1293 rval = 1; 1294 type = TYPE_I; 1295 1296 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1297 if ((parse_url(url, "URL", &urltype, &user, &pass, 1298 &host, &port, &portnum, &path) == -1) || 1299 (user != NULL && *user == '\0') || 1300 (pass != NULL && *pass == '\0') || 1301 EMPTYSTRING(host)) { 1302 warnx("Invalid URL `%s'", url); 1303 goto cleanup_fetch_ftp; 1304 } 1305 url_decode(user); 1306 url_decode(pass); 1307 /* 1308 * Note: Don't url_decode(path) here. We need to keep the 1309 * distinction between "/" and "%2F" until later. 1310 */ 1311 1312 /* check for trailing ';type=[aid]' */ 1313 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1314 if (strcasecmp(cp, ";type=a") == 0) 1315 type = TYPE_A; 1316 else if (strcasecmp(cp, ";type=i") == 0) 1317 type = TYPE_I; 1318 else if (strcasecmp(cp, ";type=d") == 0) { 1319 warnx( 1320 "Directory listing via a URL is not supported"); 1321 goto cleanup_fetch_ftp; 1322 } else { 1323 warnx("Invalid suffix `%s' in URL `%s'", cp, 1324 url); 1325 goto cleanup_fetch_ftp; 1326 } 1327 *cp = 0; 1328 } 1329 } else { /* classic style `[user@]host:[file]' */ 1330 urltype = CLASSIC_URL_T; 1331 host = xstrdup(url); 1332 cp = strchr(host, '@'); 1333 if (cp != NULL) { 1334 *cp = '\0'; 1335 user = host; 1336 anonftp = 0; /* disable anonftp */ 1337 host = xstrdup(cp + 1); 1338 } 1339 cp = strchr(host, ':'); 1340 if (cp != NULL) { 1341 *cp = '\0'; 1342 path = xstrdup(cp + 1); 1343 } 1344 } 1345 if (EMPTYSTRING(host)) 1346 goto cleanup_fetch_ftp; 1347 1348 /* Extract the file and (if present) directory name. */ 1349 dir = path; 1350 if (! EMPTYSTRING(dir)) { 1351 /* 1352 * If we are dealing with classic `[user@]host:[path]' syntax, 1353 * then a path of the form `/file' (resulting from input of the 1354 * form `host:/file') means that we should do "CWD /" before 1355 * retrieving the file. So we set dir="/" and file="file". 1356 * 1357 * But if we are dealing with URLs like `ftp://host/path' then 1358 * a path of the form `/file' (resulting from a URL of the form 1359 * `ftp://host//file') means that we should do `CWD ' (with an 1360 * empty argument) before retrieving the file. So we set 1361 * dir="" and file="file". 1362 * 1363 * If the path does not contain / at all, we set dir=NULL. 1364 * (We get a path without any slashes if we are dealing with 1365 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1366 * 1367 * In all other cases, we set dir to a string that does not 1368 * include the final '/' that separates the dir part from the 1369 * file part of the path. (This will be the empty string if 1370 * and only if we are dealing with a path of the form `/file' 1371 * resulting from an URL of the form `ftp://host//file'.) 1372 */ 1373 cp = strrchr(dir, '/'); 1374 if (cp == dir && urltype == CLASSIC_URL_T) { 1375 file = cp + 1; 1376 dir = "/"; 1377 } else if (cp != NULL) { 1378 *cp++ = '\0'; 1379 file = cp; 1380 } else { 1381 file = dir; 1382 dir = NULL; 1383 } 1384 } else 1385 dir = NULL; 1386 if (urltype == FTP_URL_T && file != NULL) { 1387 url_decode(file); 1388 /* but still don't url_decode(dir) */ 1389 } 1390 if (debug) 1391 fprintf(ttyout, 1392 "fetch_ftp: user `%s' pass `%s' host %s port %s " 1393 "path `%s' dir `%s' file `%s'\n", 1394 user ? user : "<null>", pass ? pass : "<null>", 1395 host ? host : "<null>", port ? port : "<null>", 1396 path ? path : "<null>", 1397 dir ? dir : "<null>", file ? file : "<null>"); 1398 1399 dirhasglob = filehasglob = 0; 1400 if (doglob && urltype == CLASSIC_URL_T) { 1401 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1402 dirhasglob = 1; 1403 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1404 filehasglob = 1; 1405 } 1406 1407 /* Set up the connection */ 1408 if (connected) 1409 disconnect(0, NULL); 1410 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1411 xargv[1] = host; 1412 xargv[2] = NULL; 1413 xargc = 2; 1414 if (port) { 1415 xargv[2] = port; 1416 xargv[3] = NULL; 1417 xargc = 3; 1418 } 1419 oautologin = autologin; 1420 /* don't autologin in setpeer(), use ftp_login() below */ 1421 autologin = 0; 1422 setpeer(xargc, xargv); 1423 autologin = oautologin; 1424 if ((connected == 0) || 1425 (connected == 1 && !ftp_login(host, user, pass))) { 1426 warnx("Can't connect or login to host `%s'", host); 1427 goto cleanup_fetch_ftp; 1428 } 1429 1430 switch (type) { 1431 case TYPE_A: 1432 setascii(1, xargv); 1433 break; 1434 case TYPE_I: 1435 setbinary(1, xargv); 1436 break; 1437 default: 1438 errx(1, "fetch_ftp: unknown transfer type %d", type); 1439 } 1440 1441 /* 1442 * Change directories, if necessary. 1443 * 1444 * Note: don't use EMPTYSTRING(dir) below, because 1445 * dir=="" means something different from dir==NULL. 1446 */ 1447 if (dir != NULL && !dirhasglob) { 1448 char *nextpart; 1449 1450 /* 1451 * If we are dealing with a classic `[user@]host:[path]' 1452 * (urltype is CLASSIC_URL_T) then we have a raw directory 1453 * name (not encoded in any way) and we can change 1454 * directories in one step. 1455 * 1456 * If we are dealing with an `ftp://host/path' URL 1457 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1458 * send a separate CWD command for each unescaped "/" 1459 * in the path, and we have to interpret %hex escaping 1460 * *after* we find the slashes. It's possible to get 1461 * empty components here, (from multiple adjacent 1462 * slashes in the path) and RFC 1738 says that we should 1463 * still do `CWD ' (with a null argument) in such cases. 1464 * 1465 * Many ftp servers don't support `CWD ', so if there's an 1466 * error performing that command, bail out with a descriptive 1467 * message. 1468 * 1469 * Examples: 1470 * 1471 * host: dir="", urltype=CLASSIC_URL_T 1472 * logged in (to default directory) 1473 * host:file dir=NULL, urltype=CLASSIC_URL_T 1474 * "RETR file" 1475 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1476 * "CWD dir", logged in 1477 * ftp://host/ dir="", urltype=FTP_URL_T 1478 * logged in (to default directory) 1479 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1480 * "CWD dir", logged in 1481 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1482 * "RETR file" 1483 * ftp://host//file dir="", urltype=FTP_URL_T 1484 * "CWD ", "RETR file" 1485 * host:/file dir="/", urltype=CLASSIC_URL_T 1486 * "CWD /", "RETR file" 1487 * ftp://host///file dir="/", urltype=FTP_URL_T 1488 * "CWD ", "CWD ", "RETR file" 1489 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1490 * "CWD /", "RETR file" 1491 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1492 * "CWD foo", "RETR file" 1493 * ftp://host/foo/bar/file dir="foo/bar" 1494 * "CWD foo", "CWD bar", "RETR file" 1495 * ftp://host//foo/bar/file dir="/foo/bar" 1496 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1497 * ftp://host/foo//bar/file dir="foo//bar" 1498 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1499 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1500 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1501 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1502 * "CWD /foo", "CWD bar", "RETR file" 1503 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1504 * "CWD /foo/bar", "RETR file" 1505 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1506 * "RETR /foo/bar/file" 1507 * 1508 * Note that we don't need `dir' after this point. 1509 */ 1510 do { 1511 if (urltype == FTP_URL_T) { 1512 nextpart = strchr(dir, '/'); 1513 if (nextpart) { 1514 *nextpart = '\0'; 1515 nextpart++; 1516 } 1517 url_decode(dir); 1518 } else 1519 nextpart = NULL; 1520 if (debug) 1521 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1522 dir ? dir : "<null>", 1523 nextpart ? nextpart : "<null>"); 1524 if (urltype == FTP_URL_T || *dir != '\0') { 1525 xargv[0] = "cd"; 1526 xargv[1] = dir; 1527 xargv[2] = NULL; 1528 dirchange = 0; 1529 cd(2, xargv); 1530 if (! dirchange) { 1531 if (*dir == '\0' && code == 500) 1532 fprintf(stderr, 1533 "\n" 1534 "ftp: The `CWD ' command (without a directory), which is required by\n" 1535 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1536 " conflicts with the server's conformance to RFC 959.\n" 1537 " Try the same URL without the `//' in the URL pathname.\n" 1538 "\n"); 1539 goto cleanup_fetch_ftp; 1540 } 1541 } 1542 dir = nextpart; 1543 } while (dir != NULL); 1544 } 1545 1546 if (EMPTYSTRING(file)) { 1547 rval = -1; 1548 goto cleanup_fetch_ftp; 1549 } 1550 1551 if (dirhasglob) { 1552 (void)strlcpy(rempath, dir, sizeof(rempath)); 1553 (void)strlcat(rempath, "/", sizeof(rempath)); 1554 (void)strlcat(rempath, file, sizeof(rempath)); 1555 file = rempath; 1556 } 1557 1558 /* Fetch the file(s). */ 1559 xargc = 2; 1560 xargv[0] = "get"; 1561 xargv[1] = file; 1562 xargv[2] = NULL; 1563 if (dirhasglob || filehasglob) { 1564 int ointeractive; 1565 1566 ointeractive = interactive; 1567 interactive = 0; 1568 xargv[0] = "mget"; 1569 mget(xargc, xargv); 1570 interactive = ointeractive; 1571 } else { 1572 if (outfile == NULL) { 1573 cp = strrchr(file, '/'); /* find savefile */ 1574 if (cp != NULL) 1575 outfile = cp + 1; 1576 else 1577 outfile = file; 1578 } 1579 xargv[2] = (char *)outfile; 1580 xargv[3] = NULL; 1581 xargc++; 1582 if (restartautofetch) 1583 reget(xargc, xargv); 1584 else 1585 get(xargc, xargv); 1586 } 1587 1588 if ((code / 100) == COMPLETE) 1589 rval = 0; 1590 1591 cleanup_fetch_ftp: 1592 FREEPTR(host); 1593 FREEPTR(path); 1594 FREEPTR(user); 1595 FREEPTR(pass); 1596 return (rval); 1597 } 1598 1599 /* 1600 * Retrieve the given file to outfile. 1601 * Supports arguments of the form: 1602 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1603 * call fetch_ftp() 1604 * "http://host/path" call fetch_url() to use HTTP 1605 * "file:///path" call fetch_url() to copy 1606 * "about:..." print a message 1607 * 1608 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1609 * is still open (e.g, ftp xfer with trailing /) 1610 */ 1611 static int 1612 go_fetch(const char *url) 1613 { 1614 char *proxy; 1615 1616 /* 1617 * Check for about:* 1618 */ 1619 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1620 url += sizeof(ABOUT_URL) -1; 1621 if (strcasecmp(url, "ftp") == 0) { 1622 fputs( 1623 "This version of ftp has been enhanced by Luke Mewburn <lukem@netbsd.org>\n" 1624 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1625 } else if (strcasecmp(url, "lukem") == 0) { 1626 fputs( 1627 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1628 "Please email feedback to <lukem@netbsd.org>.\n", ttyout); 1629 } else if (strcasecmp(url, "netbsd") == 0) { 1630 fputs( 1631 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1632 "For more information, see http://www.netbsd.org/index.html\n", ttyout); 1633 } else if (strcasecmp(url, "version") == 0) { 1634 fprintf(ttyout, "Version: %s %s%s\n", 1635 FTP_PRODUCT, FTP_VERSION, 1636 #ifdef INET6 1637 "" 1638 #else 1639 " (-IPv6)" 1640 #endif 1641 ); 1642 } else { 1643 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1644 } 1645 fputs("\n", ttyout); 1646 return (0); 1647 } 1648 1649 /* 1650 * Check for file:// and http:// URLs. 1651 */ 1652 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1653 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1654 return (fetch_url(url, NULL, NULL, NULL)); 1655 1656 /* 1657 * Try FTP URL-style and host:file arguments next. 1658 * If ftpproxy is set with an FTP URL, use fetch_url() 1659 * Othewise, use fetch_ftp(). 1660 */ 1661 proxy = getoptionvalue("ftp_proxy"); 1662 if (!EMPTYSTRING(proxy) && 1663 strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1664 return (fetch_url(url, NULL, NULL, NULL)); 1665 1666 return (fetch_ftp(url)); 1667 } 1668 1669 /* 1670 * Retrieve multiple files from the command line, 1671 * calling go_fetch() for each file. 1672 * 1673 * If an ftp path has a trailing "/", the path will be cd-ed into and 1674 * the connection remains open, and the function will return -1 1675 * (to indicate the connection is alive). 1676 * If an error occurs the return value will be the offset+1 in 1677 * argv[] of the file that caused a problem (i.e, argv[x] 1678 * returns x+1) 1679 * Otherwise, 0 is returned if all files retrieved successfully. 1680 */ 1681 int 1682 auto_fetch(int argc, char *argv[]) 1683 { 1684 volatile int argpos; 1685 int rval; 1686 1687 argpos = 0; 1688 1689 if (sigsetjmp(toplevel, 1)) { 1690 if (connected) 1691 disconnect(0, NULL); 1692 return (argpos + 1); 1693 } 1694 (void)xsignal(SIGINT, intr); 1695 (void)xsignal(SIGPIPE, lostpeer); 1696 1697 /* 1698 * Loop through as long as there's files to fetch. 1699 */ 1700 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1701 if (strchr(argv[argpos], ':') == NULL) 1702 break; 1703 redirect_loop = 0; 1704 if (!anonftp) 1705 anonftp = 2; /* Handle "automatic" transfers. */ 1706 rval = go_fetch(argv[argpos]); 1707 if (outfile != NULL && strcmp(outfile, "-") != 0 1708 && outfile[0] != '|') 1709 outfile = NULL; 1710 if (rval > 0) 1711 rval = argpos + 1; 1712 } 1713 1714 if (connected && rval != -1) 1715 disconnect(0, NULL); 1716 return (rval); 1717 } 1718 1719 1720 int 1721 auto_put(int argc, char **argv, const char *uploadserver) 1722 { 1723 char *uargv[4], *path, *pathsep; 1724 int uargc, rval, len; 1725 1726 uargc = 0; 1727 uargv[uargc++] = "mput"; 1728 uargv[uargc++] = argv[0]; 1729 uargv[2] = uargv[3] = NULL; 1730 pathsep = NULL; 1731 rval = 1; 1732 1733 if (debug) 1734 fprintf(ttyout, "auto_put: target `%s'\n", uploadserver); 1735 1736 path = xstrdup(uploadserver); 1737 len = strlen(path); 1738 if (path[len - 1] != '/' && path[len - 1] != ':') { 1739 /* 1740 * make sure we always pass a directory to auto_fetch 1741 */ 1742 if (argc > 1) { /* more than one file to upload */ 1743 int len; 1744 1745 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1746 free(path); 1747 path = (char *)xmalloc(len); 1748 (void)strlcpy(path, uploadserver, len); 1749 (void)strlcat(path, "/", len); 1750 } else { /* single file to upload */ 1751 uargv[0] = "put"; 1752 pathsep = strrchr(path, '/'); 1753 if (pathsep == NULL) { 1754 pathsep = strrchr(path, ':'); 1755 if (pathsep == NULL) { 1756 warnx("Invalid URL `%s'", path); 1757 goto cleanup_auto_put; 1758 } 1759 pathsep++; 1760 uargv[2] = xstrdup(pathsep); 1761 pathsep[0] = '/'; 1762 } else 1763 uargv[2] = xstrdup(pathsep + 1); 1764 pathsep[1] = '\0'; 1765 uargc++; 1766 } 1767 } 1768 if (debug) 1769 fprintf(ttyout, "auto_put: url `%s' argv[2] `%s'\n", 1770 path, uargv[2] ? uargv[2] : "<null>"); 1771 1772 /* connect and cwd */ 1773 rval = auto_fetch(1, &path); 1774 free(path); 1775 if(rval >= 0) 1776 goto cleanup_auto_put; 1777 1778 /* XXX : is this the best way? */ 1779 if (uargc == 3) { 1780 uargv[1] = argv[0]; 1781 put(uargc, uargv); 1782 goto cleanup_auto_put; 1783 } 1784 1785 for(; argv[0] != NULL; argv++) { 1786 uargv[1] = argv[0]; 1787 mput(uargc, uargv); 1788 } 1789 rval = 0; 1790 1791 cleanup_auto_put: 1792 FREEPTR(uargv[2]); 1793 return (rval); 1794 } 1795