1 /* $NetBSD: fetch.c,v 1.173 2006/12/13 18:04:08 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2006 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 1.173 2006/12/13 18:04:08 christos 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 #ifndef NO_AUTH 86 static int auth_url(const char *, char **, const char *, const char *); 87 static void base64_encode(const unsigned char *, size_t, unsigned char *); 88 #endif 89 static int go_fetch(const char *); 90 static int fetch_ftp(const char *); 91 static int fetch_url(const char *, const char *, char *, char *); 92 static const char *match_token(const char **, const char *); 93 static int parse_url(const char *, const char *, url_t *, char **, 94 char **, char **, char **, in_port_t *, char **); 95 static void url_decode(char *); 96 97 static int redirect_loop; 98 99 100 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0) 101 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t') 102 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0) 103 104 105 #define ABOUT_URL "about:" /* propaganda */ 106 #define FILE_URL "file://" /* file URL prefix */ 107 #define FTP_URL "ftp://" /* ftp URL prefix */ 108 #define HTTP_URL "http://" /* http URL prefix */ 109 110 111 /* 112 * Determine if token is the next word in buf (case insensitive). 113 * If so, advance buf past the token and any trailing LWS, and 114 * return a pointer to the token (in buf). Otherwise, return NULL. 115 * token may be preceded by LWS. 116 * token must be followed by LWS or NUL. (I.e, don't partial match). 117 */ 118 static const char * 119 match_token(const char **buf, const char *token) 120 { 121 const char *p, *orig; 122 size_t tlen; 123 124 tlen = strlen(token); 125 p = *buf; 126 SKIPLWS(p); 127 orig = p; 128 if (strncasecmp(p, token, tlen) != 0) 129 return NULL; 130 p += tlen; 131 if (*p != '\0' && !ISLWS(*p)) 132 return NULL; 133 SKIPLWS(p); 134 orig = *buf; 135 *buf = p; 136 return orig; 137 } 138 139 #ifndef NO_AUTH 140 /* 141 * Generate authorization response based on given authentication challenge. 142 * Returns -1 if an error occurred, otherwise 0. 143 * Sets response to a malloc(3)ed string; caller should free. 144 */ 145 static int 146 auth_url(const char *challenge, char **response, const char *guser, 147 const char *gpass) 148 { 149 const char *cp, *scheme, *errormsg; 150 char *ep, *clear, *realm; 151 char user[BUFSIZ], *pass; 152 int rval; 153 size_t len, clen, rlen; 154 155 *response = NULL; 156 clear = realm = NULL; 157 rval = -1; 158 cp = challenge; 159 scheme = "Basic"; /* only support Basic authentication */ 160 161 DPRINTF("auth_url: challenge `%s'\n", challenge); 162 163 if (! match_token(&cp, scheme)) { 164 warnx("Unsupported authentication challenge - `%s'", 165 challenge); 166 goto cleanup_auth_url; 167 } 168 169 #define REALM "realm=\"" 170 if (STRNEQUAL(cp, REALM)) 171 cp += sizeof(REALM) - 1; 172 else { 173 warnx("Unsupported authentication challenge - `%s'", 174 challenge); 175 goto cleanup_auth_url; 176 } 177 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 178 if ((ep = strchr(cp, '\"')) != NULL) { 179 size_t len = ep - cp; 180 181 realm = (char *)ftp_malloc(len + 1); 182 (void)strlcpy(realm, cp, len + 1); 183 } else { 184 warnx("Unsupported authentication challenge - `%s'", 185 challenge); 186 goto cleanup_auth_url; 187 } 188 189 fprintf(ttyout, "Username for `%s': ", realm); 190 if (guser != NULL) { 191 (void)strlcpy(user, guser, sizeof(user)); 192 fprintf(ttyout, "%s\n", user); 193 } else { 194 (void)fflush(ttyout); 195 if (getline(stdin, user, sizeof(user), &errormsg) < 0) { 196 warnx("%s; can't authenticate", errormsg); 197 goto cleanup_auth_url; 198 } 199 } 200 if (gpass != NULL) 201 pass = (char *)gpass; 202 else 203 pass = getpass("Password: "); 204 205 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 206 clear = (char *)ftp_malloc(clen); 207 (void)strlcpy(clear, user, clen); 208 (void)strlcat(clear, ":", clen); 209 (void)strlcat(clear, pass, clen); 210 if (gpass == NULL) 211 memset(pass, 0, strlen(pass)); 212 213 /* scheme + " " + enc + "\0" */ 214 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 215 *response = (char *)ftp_malloc(rlen); 216 (void)strlcpy(*response, scheme, rlen); 217 len = strlcat(*response, " ", rlen); 218 /* use `clen - 1' to not encode the trailing NUL */ 219 base64_encode((unsigned char *)clear, clen - 1, 220 (unsigned char *)*response + len); 221 memset(clear, 0, clen); 222 rval = 0; 223 224 cleanup_auth_url: 225 FREEPTR(clear); 226 FREEPTR(realm); 227 return (rval); 228 } 229 230 /* 231 * Encode len bytes starting at clear using base64 encoding into encoded, 232 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 233 */ 234 static void 235 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 236 { 237 static const unsigned char enc[] = 238 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 239 unsigned char *cp; 240 int i; 241 242 cp = encoded; 243 for (i = 0; i < len; i += 3) { 244 *(cp++) = enc[((clear[i + 0] >> 2))]; 245 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 246 | ((clear[i + 1] >> 4) & 0x0f)]; 247 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 248 | ((clear[i + 2] >> 6) & 0x03)]; 249 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 250 } 251 *cp = '\0'; 252 while (i-- > len) 253 *(--cp) = '='; 254 } 255 #endif 256 257 /* 258 * Decode %xx escapes in given string, `in-place'. 259 */ 260 static void 261 url_decode(char *url) 262 { 263 unsigned char *p, *q; 264 265 if (EMPTYSTRING(url)) 266 return; 267 p = q = (unsigned char *)url; 268 269 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 270 while (*p) { 271 if (p[0] == '%' 272 && p[1] && isxdigit((unsigned char)p[1]) 273 && p[2] && isxdigit((unsigned char)p[2])) { 274 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 275 p+=3; 276 } else 277 *q++ = *p++; 278 } 279 *q = '\0'; 280 } 281 282 283 /* 284 * Parse URL of form: 285 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 286 * Returns -1 if a parse error occurred, otherwise 0. 287 * It's the caller's responsibility to url_decode() the returned 288 * user, pass and path. 289 * 290 * Sets type to url_t, each of the given char ** pointers to a 291 * malloc(3)ed strings of the relevant section, and port to 292 * the number given, or ftpport if ftp://, or httpport if http://. 293 * 294 * If <host> is surrounded by `[' and ']', it's parsed as an 295 * IPv6 address (as per RFC 2732). 296 * 297 * XXX: this is not totally RFC 1738 compliant; <path> will have the 298 * leading `/' unless it's an ftp:// URL, as this makes things easier 299 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 300 * host and the URL-path removed, but any additional leading slashes 301 * in the URL-path are retained (because they imply that we should 302 * later do "CWD" with a null argument). 303 * 304 * Examples: 305 * input URL output path 306 * --------- ----------- 307 * "ftp://host" NULL 308 * "http://host/" NULL 309 * "file://host/dir/file" "dir/file" 310 * "ftp://host/" "" 311 * "ftp://host//" NULL 312 * "ftp://host//dir/file" "/dir/file" 313 */ 314 static int 315 parse_url(const char *url, const char *desc, url_t *type, 316 char **user, char **pass, char **host, char **port, 317 in_port_t *portnum, char **path) 318 { 319 const char *origurl; 320 char *cp, *ep, *thost, *tport; 321 size_t len; 322 323 if (url == NULL || desc == NULL || type == NULL || user == NULL 324 || pass == NULL || host == NULL || port == NULL || portnum == NULL 325 || path == NULL) 326 errx(1, "parse_url: invoked with NULL argument!"); 327 328 origurl = url; 329 *type = UNKNOWN_URL_T; 330 *user = *pass = *host = *port = *path = NULL; 331 *portnum = 0; 332 tport = NULL; 333 334 if (STRNEQUAL(url, HTTP_URL)) { 335 url += sizeof(HTTP_URL) - 1; 336 *type = HTTP_URL_T; 337 *portnum = HTTP_PORT; 338 tport = httpport; 339 } else if (STRNEQUAL(url, FTP_URL)) { 340 url += sizeof(FTP_URL) - 1; 341 *type = FTP_URL_T; 342 *portnum = FTP_PORT; 343 tport = ftpport; 344 } else if (STRNEQUAL(url, FILE_URL)) { 345 url += sizeof(FILE_URL) - 1; 346 *type = FILE_URL_T; 347 } else { 348 warnx("Invalid %s `%s'", desc, url); 349 cleanup_parse_url: 350 FREEPTR(*user); 351 if (*pass != NULL) 352 memset(*pass, 0, strlen(*pass)); 353 FREEPTR(*pass); 354 FREEPTR(*host); 355 FREEPTR(*port); 356 FREEPTR(*path); 357 return (-1); 358 } 359 360 if (*url == '\0') 361 return (0); 362 363 /* find [user[:pass]@]host[:port] */ 364 ep = strchr(url, '/'); 365 if (ep == NULL) 366 thost = ftp_strdup(url); 367 else { 368 len = ep - url; 369 thost = (char *)ftp_malloc(len + 1); 370 (void)strlcpy(thost, url, len + 1); 371 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 372 ep++; 373 *path = ftp_strdup(ep); 374 } 375 376 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 377 if (cp != NULL) { 378 if (*type == FTP_URL_T) 379 anonftp = 0; /* disable anonftp */ 380 *user = thost; 381 *cp = '\0'; 382 thost = ftp_strdup(cp + 1); 383 cp = strchr(*user, ':'); 384 if (cp != NULL) { 385 *cp = '\0'; 386 *pass = ftp_strdup(cp + 1); 387 } 388 url_decode(*user); 389 if (*pass) 390 url_decode(*pass); 391 } 392 393 #ifdef INET6 394 /* 395 * Check if thost is an encoded IPv6 address, as per 396 * RFC 2732: 397 * `[' ipv6-address ']' 398 */ 399 if (*thost == '[') { 400 cp = thost + 1; 401 if ((ep = strchr(cp, ']')) == NULL || 402 (ep[1] != '\0' && ep[1] != ':')) { 403 warnx("Invalid address `%s' in %s `%s'", 404 thost, desc, origurl); 405 goto cleanup_parse_url; 406 } 407 len = ep - cp; /* change `[xyz]' -> `xyz' */ 408 memmove(thost, thost + 1, len); 409 thost[len] = '\0'; 410 if (! isipv6addr(thost)) { 411 warnx("Invalid IPv6 address `%s' in %s `%s'", 412 thost, desc, origurl); 413 goto cleanup_parse_url; 414 } 415 cp = ep + 1; 416 if (*cp == ':') 417 cp++; 418 else 419 cp = NULL; 420 } else 421 #endif /* INET6 */ 422 if ((cp = strchr(thost, ':')) != NULL) 423 *cp++ = '\0'; 424 *host = thost; 425 426 /* look for [:port] */ 427 if (cp != NULL) { 428 long nport; 429 430 nport = parseport(cp, -1); 431 if (nport == -1) { 432 warnx("Unknown port `%s' in %s `%s'", 433 cp, desc, origurl); 434 goto cleanup_parse_url; 435 } 436 *portnum = nport; 437 tport = cp; 438 } 439 440 if (tport != NULL) 441 *port = ftp_strdup(tport); 442 if (*path == NULL) 443 *path = ftp_strdup("/"); 444 445 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 446 "path `%s'\n", 447 *user ? *user : "<null>", *pass ? *pass : "<null>", 448 *host ? *host : "<null>", *port ? *port : "<null>", 449 *portnum ? *portnum : -1, *path ? *path : "<null>"); 450 451 return (0); 452 } 453 454 sigjmp_buf httpabort; 455 456 /* 457 * Retrieve URL, via a proxy if necessary, using HTTP. 458 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 459 * http_proxy as appropriate. 460 * Supports HTTP redirects. 461 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 462 * is still open (e.g, ftp xfer with trailing /) 463 */ 464 static int 465 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 466 { 467 struct addrinfo hints, *res, *res0 = NULL; 468 int error; 469 char hbuf[NI_MAXHOST]; 470 sigfunc volatile oldintr; 471 sigfunc volatile oldintp; 472 int volatile s; 473 struct stat sb; 474 int volatile ischunked; 475 int volatile isproxy; 476 int volatile rval; 477 int volatile hcode; 478 size_t len; 479 static size_t bufsize; 480 static char *xferbuf; 481 const char *cp, *token; 482 char *ep; 483 char *volatile buf; 484 char *volatile savefile; 485 char *volatile auth; 486 char *volatile location; 487 char *volatile message; 488 char *user, *pass, *host, *port, *path; 489 char *volatile decodedpath; 490 char *puser, *ppass, *useragent; 491 off_t hashbytes, rangestart, rangeend, entitylen; 492 int (*volatile closefunc)(FILE *); 493 FILE *volatile fin; 494 FILE *volatile fout; 495 time_t mtime; 496 url_t urltype; 497 in_port_t portnum; 498 499 oldintr = oldintp = NULL; 500 closefunc = NULL; 501 fin = fout = NULL; 502 s = -1; 503 buf = savefile = NULL; 504 auth = location = message = NULL; 505 ischunked = isproxy = hcode = 0; 506 rval = 1; 507 user = pass = host = path = decodedpath = puser = ppass = NULL; 508 509 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 510 &portnum, &path) == -1) 511 goto cleanup_fetch_url; 512 513 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 514 && strcasecmp(host, "localhost") != 0) { 515 warnx("No support for non local file URL `%s'", url); 516 goto cleanup_fetch_url; 517 } 518 519 if (EMPTYSTRING(path)) { 520 if (urltype == FTP_URL_T) { 521 rval = fetch_ftp(url); 522 goto cleanup_fetch_url; 523 } 524 if (urltype != HTTP_URL_T || outfile == NULL) { 525 warnx("Invalid URL (no file after host) `%s'", url); 526 goto cleanup_fetch_url; 527 } 528 } 529 530 decodedpath = ftp_strdup(path); 531 url_decode(decodedpath); 532 533 if (outfile) 534 savefile = ftp_strdup(outfile); 535 else { 536 cp = strrchr(decodedpath, '/'); /* find savefile */ 537 if (cp != NULL) 538 savefile = ftp_strdup(cp + 1); 539 else 540 savefile = ftp_strdup(decodedpath); 541 } 542 if (EMPTYSTRING(savefile)) { 543 if (urltype == FTP_URL_T) { 544 rval = fetch_ftp(url); 545 goto cleanup_fetch_url; 546 } 547 warnx("no file after directory (you must specify an " 548 "output file) `%s'", url); 549 goto cleanup_fetch_url; 550 } else { 551 DPRINTF("savefile `%s'\n", savefile); 552 } 553 554 restart_point = 0; 555 filesize = -1; 556 rangestart = rangeend = entitylen = -1; 557 mtime = -1; 558 if (restartautofetch) { 559 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 560 stat(savefile, &sb) == 0) 561 restart_point = sb.st_size; 562 } 563 if (urltype == FILE_URL_T) { /* file:// URLs */ 564 direction = "copied"; 565 fin = fopen(decodedpath, "r"); 566 if (fin == NULL) { 567 warn("Cannot open file `%s'", decodedpath); 568 goto cleanup_fetch_url; 569 } 570 if (fstat(fileno(fin), &sb) == 0) { 571 mtime = sb.st_mtime; 572 filesize = sb.st_size; 573 } 574 if (restart_point) { 575 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 576 warn("Can't lseek to restart `%s'", 577 decodedpath); 578 goto cleanup_fetch_url; 579 } 580 } 581 if (verbose) { 582 fprintf(ttyout, "Copying %s", decodedpath); 583 if (restart_point) 584 fprintf(ttyout, " (restarting at " LLF ")", 585 (LLT)restart_point); 586 fputs("\n", ttyout); 587 } 588 } else { /* ftp:// or http:// URLs */ 589 char *leading; 590 int hasleading; 591 592 if (proxyenv == NULL) { 593 if (urltype == HTTP_URL_T) 594 proxyenv = getoptionvalue("http_proxy"); 595 else if (urltype == FTP_URL_T) 596 proxyenv = getoptionvalue("ftp_proxy"); 597 } 598 direction = "retrieved"; 599 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 600 url_t purltype; 601 char *phost, *ppath; 602 char *pport, *no_proxy; 603 604 isproxy = 1; 605 606 /* check URL against list of no_proxied sites */ 607 no_proxy = getoptionvalue("no_proxy"); 608 if (! EMPTYSTRING(no_proxy)) { 609 char *np, *np_copy, *np_iter; 610 long np_port; 611 size_t hlen, plen; 612 613 np_iter = np_copy = ftp_strdup(no_proxy); 614 hlen = strlen(host); 615 while ((cp = strsep(&np_iter, " ,")) != NULL) { 616 if (*cp == '\0') 617 continue; 618 if ((np = strrchr(cp, ':')) != NULL) { 619 *np = '\0'; 620 np_port = 621 strtol(np + 1, &ep, 10); 622 if (*ep != '\0') 623 continue; 624 if (np_port != portnum) 625 continue; 626 } 627 plen = strlen(cp); 628 if (hlen < plen) 629 continue; 630 if (strncasecmp(host + hlen - plen, 631 cp, plen) == 0) { 632 isproxy = 0; 633 break; 634 } 635 } 636 FREEPTR(np_copy); 637 if (isproxy == 0 && urltype == FTP_URL_T) { 638 rval = fetch_ftp(url); 639 goto cleanup_fetch_url; 640 } 641 } 642 643 if (isproxy) { 644 if (parse_url(proxyenv, "proxy URL", &purltype, 645 &puser, &ppass, &phost, &pport, &portnum, 646 &ppath) == -1) 647 goto cleanup_fetch_url; 648 649 if ((purltype != HTTP_URL_T 650 && purltype != FTP_URL_T) || 651 EMPTYSTRING(phost) || 652 (! EMPTYSTRING(ppath) 653 && strcmp(ppath, "/") != 0)) { 654 warnx("Malformed proxy URL `%s'", 655 proxyenv); 656 FREEPTR(phost); 657 FREEPTR(pport); 658 FREEPTR(ppath); 659 goto cleanup_fetch_url; 660 } 661 if (isipv6addr(host) && 662 strchr(host, '%') != NULL) { 663 warnx( 664 "Scoped address notation `%s' disallowed via web proxy", 665 host); 666 FREEPTR(phost); 667 FREEPTR(pport); 668 FREEPTR(ppath); 669 goto cleanup_fetch_url; 670 } 671 672 FREEPTR(host); 673 host = phost; 674 FREEPTR(port); 675 port = pport; 676 FREEPTR(path); 677 path = ftp_strdup(url); 678 FREEPTR(ppath); 679 } 680 } /* ! EMPTYSTRING(proxyenv) */ 681 682 memset(&hints, 0, sizeof(hints)); 683 hints.ai_flags = 0; 684 hints.ai_family = family; 685 hints.ai_socktype = SOCK_STREAM; 686 hints.ai_protocol = 0; 687 error = getaddrinfo(host, NULL, &hints, &res0); 688 if (error) { 689 warnx("%s: %s", host, gai_strerror(error)); 690 goto cleanup_fetch_url; 691 } 692 if (res0->ai_canonname) 693 host = res0->ai_canonname; 694 695 s = -1; 696 for (res = res0; res; res = res->ai_next) { 697 /* 698 * see comment in hookup() 699 */ 700 ai_unmapped(res); 701 if (getnameinfo(res->ai_addr, res->ai_addrlen, 702 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 703 strlcpy(hbuf, "invalid", sizeof(hbuf)); 704 705 if (verbose && res0->ai_next) { 706 fprintf(ttyout, "Trying %s...\n", hbuf); 707 } 708 709 ((struct sockaddr_in *)res->ai_addr)->sin_port = 710 htons(portnum); 711 s = socket(res->ai_family, SOCK_STREAM, 712 res->ai_protocol); 713 if (s < 0) { 714 warn("Can't create socket"); 715 continue; 716 } 717 718 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 719 warn("Connect to address `%s'", hbuf); 720 close(s); 721 s = -1; 722 continue; 723 } 724 725 /* success */ 726 break; 727 } 728 729 if (s < 0) { 730 warn("Can't connect to %s", host); 731 goto cleanup_fetch_url; 732 } 733 734 fin = fdopen(s, "r+"); 735 /* 736 * Construct and send the request. 737 */ 738 if (verbose) 739 fprintf(ttyout, "Requesting %s\n", url); 740 leading = " ("; 741 hasleading = 0; 742 if (isproxy) { 743 if (verbose) { 744 fprintf(ttyout, "%svia %s:%s", leading, 745 host, port); 746 leading = ", "; 747 hasleading++; 748 } 749 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 750 if (flushcache) 751 fprintf(fin, "Pragma: no-cache\r\n"); 752 } else { 753 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 754 if (strchr(host, ':')) { 755 char *h, *p; 756 757 /* 758 * strip off IPv6 scope identifier, since it is 759 * local to the node 760 */ 761 h = ftp_strdup(host); 762 if (isipv6addr(h) && 763 (p = strchr(h, '%')) != NULL) { 764 *p = '\0'; 765 } 766 fprintf(fin, "Host: [%s]", h); 767 free(h); 768 } else 769 fprintf(fin, "Host: %s", host); 770 if (portnum != HTTP_PORT) 771 fprintf(fin, ":%u", portnum); 772 fprintf(fin, "\r\n"); 773 fprintf(fin, "Accept: */*\r\n"); 774 fprintf(fin, "Connection: close\r\n"); 775 if (restart_point) { 776 fputs(leading, ttyout); 777 fprintf(fin, "Range: bytes=" LLF "-\r\n", 778 (LLT)restart_point); 779 fprintf(ttyout, "restarting at " LLF, 780 (LLT)restart_point); 781 leading = ", "; 782 hasleading++; 783 } 784 if (flushcache) 785 fprintf(fin, "Cache-Control: no-cache\r\n"); 786 } 787 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 788 fprintf(fin, "User-Agent: %s\r\n", useragent); 789 } else { 790 fprintf(fin, "User-Agent: %s/%s\r\n", 791 FTP_PRODUCT, FTP_VERSION); 792 } 793 if (wwwauth) { 794 if (verbose) { 795 fprintf(ttyout, "%swith authorization", 796 leading); 797 leading = ", "; 798 hasleading++; 799 } 800 fprintf(fin, "Authorization: %s\r\n", wwwauth); 801 } 802 if (proxyauth) { 803 if (verbose) { 804 fprintf(ttyout, 805 "%swith proxy authorization", leading); 806 leading = ", "; 807 hasleading++; 808 } 809 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 810 } 811 if (verbose && hasleading) 812 fputs(")\n", ttyout); 813 fprintf(fin, "\r\n"); 814 if (fflush(fin) == EOF) { 815 warn("Writing HTTP request"); 816 goto cleanup_fetch_url; 817 } 818 819 /* Read the response */ 820 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 821 warn("Receiving HTTP reply"); 822 goto cleanup_fetch_url; 823 } 824 while (len > 0 && (ISLWS(buf[len-1]))) 825 buf[--len] = '\0'; 826 DPRINTF("received `%s'\n", buf); 827 828 /* Determine HTTP response code */ 829 cp = strchr(buf, ' '); 830 if (cp == NULL) 831 goto improper; 832 else 833 cp++; 834 hcode = strtol(cp, &ep, 10); 835 if (*ep != '\0' && !isspace((unsigned char)*ep)) 836 goto improper; 837 message = ftp_strdup(cp); 838 839 /* Read the rest of the header. */ 840 while (1) { 841 FREEPTR(buf); 842 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 843 == NULL) { 844 warn("Receiving HTTP reply"); 845 goto cleanup_fetch_url; 846 } 847 while (len > 0 && (ISLWS(buf[len-1]))) 848 buf[--len] = '\0'; 849 if (len == 0) 850 break; 851 DPRINTF("received `%s'\n", buf); 852 853 /* 854 * Look for some headers 855 */ 856 857 cp = buf; 858 859 if (match_token(&cp, "Content-Length:")) { 860 filesize = STRTOLL(cp, &ep, 10); 861 if (filesize < 0 || *ep != '\0') 862 goto improper; 863 DPRINTF("parsed len as: " LLF "\n", 864 (LLT)filesize); 865 866 } else if (match_token(&cp, "Content-Range:")) { 867 if (! match_token(&cp, "bytes")) 868 goto improper; 869 870 if (*cp == '*') 871 cp++; 872 else { 873 rangestart = STRTOLL(cp, &ep, 10); 874 if (rangestart < 0 || *ep != '-') 875 goto improper; 876 cp = ep + 1; 877 rangeend = STRTOLL(cp, &ep, 10); 878 if (rangeend < 0 || rangeend < rangestart) 879 goto improper; 880 cp = ep; 881 } 882 if (*cp != '/') 883 goto improper; 884 cp++; 885 if (*cp == '*') 886 cp++; 887 else { 888 entitylen = STRTOLL(cp, &ep, 10); 889 if (entitylen < 0) 890 goto improper; 891 cp = ep; 892 } 893 if (*cp != '\0') 894 goto improper; 895 896 #ifndef NO_DEBUG 897 if (ftp_debug) { 898 fprintf(ttyout, "parsed range as: "); 899 if (rangestart == -1) 900 fprintf(ttyout, "*"); 901 else 902 fprintf(ttyout, LLF "-" LLF, 903 (LLT)rangestart, 904 (LLT)rangeend); 905 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 906 } 907 #endif 908 if (! restart_point) { 909 warnx( 910 "Received unexpected Content-Range header"); 911 goto cleanup_fetch_url; 912 } 913 914 } else if (match_token(&cp, "Last-Modified:")) { 915 struct tm parsed; 916 char *t; 917 918 /* RFC 1123 */ 919 if ((t = strptime(cp, 920 "%a, %d %b %Y %H:%M:%S GMT", 921 &parsed)) 922 /* RFC 850 */ 923 || (t = strptime(cp, 924 "%a, %d-%b-%y %H:%M:%S GMT", 925 &parsed)) 926 /* asctime */ 927 || (t = strptime(cp, 928 "%a, %b %d %H:%M:%S %Y", 929 &parsed))) { 930 parsed.tm_isdst = -1; 931 if (*t == '\0') 932 mtime = timegm(&parsed); 933 #ifndef NO_DEBUG 934 if (ftp_debug && mtime != -1) { 935 fprintf(ttyout, 936 "parsed date as: %s", 937 ctime(&mtime)); 938 } 939 #endif 940 } 941 942 } else if (match_token(&cp, "Location:")) { 943 location = ftp_strdup(cp); 944 DPRINTF("parsed location as `%s'\n", cp); 945 946 } else if (match_token(&cp, "Transfer-Encoding:")) { 947 if (match_token(&cp, "binary")) { 948 warnx( 949 "Bogus transfer encoding - `binary' (fetching anyway)"); 950 continue; 951 } 952 if (! (token = match_token(&cp, "chunked"))) { 953 warnx( 954 "Unsupported transfer encoding - `%s'", 955 token); 956 goto cleanup_fetch_url; 957 } 958 ischunked++; 959 DPRINTF("using chunked encoding\n"); 960 961 } else if (match_token(&cp, "Proxy-Authenticate:") 962 || match_token(&cp, "WWW-Authenticate:")) { 963 if (! (token = match_token(&cp, "Basic"))) { 964 DPRINTF( 965 "skipping unknown auth scheme `%s'\n", 966 token); 967 continue; 968 } 969 FREEPTR(auth); 970 auth = ftp_strdup(token); 971 DPRINTF("parsed auth as `%s'\n", cp); 972 } 973 974 } 975 /* finished parsing header */ 976 FREEPTR(buf); 977 978 switch (hcode) { 979 case 200: 980 break; 981 case 206: 982 if (! restart_point) { 983 warnx("Not expecting partial content header"); 984 goto cleanup_fetch_url; 985 } 986 break; 987 case 300: 988 case 301: 989 case 302: 990 case 303: 991 case 305: 992 case 307: 993 if (EMPTYSTRING(location)) { 994 warnx( 995 "No redirection Location provided by server"); 996 goto cleanup_fetch_url; 997 } 998 if (redirect_loop++ > 5) { 999 warnx("Too many redirections requested"); 1000 goto cleanup_fetch_url; 1001 } 1002 if (hcode == 305) { 1003 if (verbose) 1004 fprintf(ttyout, "Redirected via %s\n", 1005 location); 1006 rval = fetch_url(url, location, 1007 proxyauth, wwwauth); 1008 } else { 1009 if (verbose) 1010 fprintf(ttyout, "Redirected to %s\n", 1011 location); 1012 rval = go_fetch(location); 1013 } 1014 goto cleanup_fetch_url; 1015 #ifndef NO_AUTH 1016 case 401: 1017 case 407: 1018 { 1019 char **authp; 1020 char *auser, *apass; 1021 1022 if (hcode == 401) { 1023 authp = &wwwauth; 1024 auser = user; 1025 apass = pass; 1026 } else { 1027 authp = &proxyauth; 1028 auser = puser; 1029 apass = ppass; 1030 } 1031 if (verbose || *authp == NULL || 1032 auser == NULL || apass == NULL) 1033 fprintf(ttyout, "%s\n", message); 1034 if (EMPTYSTRING(auth)) { 1035 warnx( 1036 "No authentication challenge provided by server"); 1037 goto cleanup_fetch_url; 1038 } 1039 if (*authp != NULL) { 1040 char reply[10]; 1041 1042 fprintf(ttyout, 1043 "Authorization failed. Retry (y/n)? "); 1044 if (getline(stdin, reply, sizeof(reply), NULL) 1045 < 0) { 1046 goto cleanup_fetch_url; 1047 } 1048 if (tolower((unsigned char)reply[0]) != 'y') 1049 goto cleanup_fetch_url; 1050 auser = NULL; 1051 apass = NULL; 1052 } 1053 if (auth_url(auth, authp, auser, apass) == 0) { 1054 rval = fetch_url(url, proxyenv, 1055 proxyauth, wwwauth); 1056 memset(*authp, 0, strlen(*authp)); 1057 FREEPTR(*authp); 1058 } 1059 goto cleanup_fetch_url; 1060 } 1061 #endif 1062 default: 1063 if (message) 1064 warnx("Error retrieving file - `%s'", message); 1065 else 1066 warnx("Unknown error retrieving file"); 1067 goto cleanup_fetch_url; 1068 } 1069 } /* end of ftp:// or http:// specific setup */ 1070 1071 /* Open the output file. */ 1072 if (strcmp(savefile, "-") == 0) { 1073 fout = stdout; 1074 } else if (*savefile == '|') { 1075 oldintp = xsignal(SIGPIPE, SIG_IGN); 1076 fout = popen(savefile + 1, "w"); 1077 if (fout == NULL) { 1078 warn("Can't run `%s'", savefile + 1); 1079 goto cleanup_fetch_url; 1080 } 1081 closefunc = pclose; 1082 } else { 1083 if ((rangeend != -1 && rangeend <= restart_point) || 1084 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1085 /* already done */ 1086 if (verbose) 1087 fprintf(ttyout, "already done\n"); 1088 rval = 0; 1089 goto cleanup_fetch_url; 1090 } 1091 if (restart_point && rangestart != -1) { 1092 if (entitylen != -1) 1093 filesize = entitylen; 1094 if (rangestart != restart_point) { 1095 warnx( 1096 "Size of `%s' differs from save file `%s'", 1097 url, savefile); 1098 goto cleanup_fetch_url; 1099 } 1100 fout = fopen(savefile, "a"); 1101 } else 1102 fout = fopen(savefile, "w"); 1103 if (fout == NULL) { 1104 warn("Can't open `%s'", savefile); 1105 goto cleanup_fetch_url; 1106 } 1107 closefunc = fclose; 1108 } 1109 1110 /* Trap signals */ 1111 if (sigsetjmp(httpabort, 1)) 1112 goto cleanup_fetch_url; 1113 (void)xsignal(SIGQUIT, psummary); 1114 oldintr = xsignal(SIGINT, aborthttp); 1115 1116 if (rcvbuf_size > bufsize) { 1117 if (xferbuf) 1118 (void)free(xferbuf); 1119 bufsize = rcvbuf_size; 1120 xferbuf = ftp_malloc(bufsize); 1121 } 1122 1123 bytes = 0; 1124 hashbytes = mark; 1125 progressmeter(-1); 1126 1127 /* Finally, suck down the file. */ 1128 do { 1129 long chunksize; 1130 1131 chunksize = 0; 1132 /* read chunksize */ 1133 if (ischunked) { 1134 if (fgets(xferbuf, bufsize, fin) == NULL) { 1135 warnx("Unexpected EOF reading chunksize"); 1136 goto cleanup_fetch_url; 1137 } 1138 chunksize = strtol(xferbuf, &ep, 16); 1139 1140 /* 1141 * XXX: Work around bug in Apache 1.3.9 and 1142 * 1.3.11, which incorrectly put trailing 1143 * space after the chunksize. 1144 */ 1145 while (*ep == ' ') 1146 ep++; 1147 1148 if (strcmp(ep, "\r\n") != 0) { 1149 warnx("Unexpected data following chunksize"); 1150 goto cleanup_fetch_url; 1151 } 1152 DPRINTF("got chunksize of " LLF "\n", (LLT)chunksize); 1153 if (chunksize == 0) 1154 break; 1155 } 1156 /* transfer file or chunk */ 1157 while (1) { 1158 struct timeval then, now, td; 1159 off_t bufrem; 1160 1161 if (rate_get) 1162 (void)gettimeofday(&then, NULL); 1163 bufrem = rate_get ? rate_get : bufsize; 1164 if (ischunked) 1165 bufrem = MIN(chunksize, bufrem); 1166 while (bufrem > 0) { 1167 len = fread(xferbuf, sizeof(char), 1168 MIN(bufsize, bufrem), fin); 1169 if (len <= 0) 1170 goto chunkdone; 1171 bytes += len; 1172 bufrem -= len; 1173 if (fwrite(xferbuf, sizeof(char), len, fout) 1174 != len) { 1175 warn("Writing `%s'", savefile); 1176 goto cleanup_fetch_url; 1177 } 1178 if (hash && !progress) { 1179 while (bytes >= hashbytes) { 1180 (void)putc('#', ttyout); 1181 hashbytes += mark; 1182 } 1183 (void)fflush(ttyout); 1184 } 1185 if (ischunked) { 1186 chunksize -= len; 1187 if (chunksize <= 0) 1188 break; 1189 } 1190 } 1191 if (rate_get) { 1192 while (1) { 1193 (void)gettimeofday(&now, NULL); 1194 timersub(&now, &then, &td); 1195 if (td.tv_sec > 0) 1196 break; 1197 usleep(1000000 - td.tv_usec); 1198 } 1199 } 1200 if (ischunked && chunksize <= 0) 1201 break; 1202 } 1203 /* read CRLF after chunk*/ 1204 chunkdone: 1205 if (ischunked) { 1206 if (fgets(xferbuf, bufsize, fin) == NULL) 1207 break; 1208 if (strcmp(xferbuf, "\r\n") != 0) { 1209 warnx("Unexpected data following chunk"); 1210 goto cleanup_fetch_url; 1211 } 1212 } 1213 } while (ischunked); 1214 if (hash && !progress && bytes > 0) { 1215 if (bytes < mark) 1216 (void)putc('#', ttyout); 1217 (void)putc('\n', ttyout); 1218 } 1219 if (ferror(fin)) { 1220 warn("Reading file"); 1221 goto cleanup_fetch_url; 1222 } 1223 progressmeter(1); 1224 (void)fflush(fout); 1225 if (closefunc == fclose && mtime != -1) { 1226 struct timeval tval[2]; 1227 1228 (void)gettimeofday(&tval[0], NULL); 1229 tval[1].tv_sec = mtime; 1230 tval[1].tv_usec = 0; 1231 (*closefunc)(fout); 1232 fout = NULL; 1233 1234 if (utimes(savefile, tval) == -1) { 1235 fprintf(ttyout, 1236 "Can't change modification time to %s", 1237 asctime(localtime(&mtime))); 1238 } 1239 } 1240 if (bytes > 0) 1241 ptransfer(0); 1242 bytes = 0; 1243 1244 rval = 0; 1245 goto cleanup_fetch_url; 1246 1247 improper: 1248 warnx("Improper response from `%s'", host); 1249 1250 cleanup_fetch_url: 1251 if (oldintr) 1252 (void)xsignal(SIGINT, oldintr); 1253 if (oldintp) 1254 (void)xsignal(SIGPIPE, oldintp); 1255 if (fin != NULL) 1256 fclose(fin); 1257 else if (s != -1) 1258 close(s); 1259 if (closefunc != NULL && fout != NULL) 1260 (*closefunc)(fout); 1261 if (res0) 1262 freeaddrinfo(res0); 1263 FREEPTR(savefile); 1264 FREEPTR(user); 1265 if (pass != NULL) 1266 memset(pass, 0, strlen(pass)); 1267 FREEPTR(pass); 1268 FREEPTR(host); 1269 FREEPTR(port); 1270 FREEPTR(path); 1271 FREEPTR(decodedpath); 1272 FREEPTR(puser); 1273 if (ppass != NULL) 1274 memset(ppass, 0, strlen(ppass)); 1275 FREEPTR(ppass); 1276 FREEPTR(buf); 1277 FREEPTR(auth); 1278 FREEPTR(location); 1279 FREEPTR(message); 1280 return (rval); 1281 } 1282 1283 /* 1284 * Abort a HTTP retrieval 1285 */ 1286 void 1287 aborthttp(int notused) 1288 { 1289 char msgbuf[100]; 1290 size_t len; 1291 1292 sigint_raised = 1; 1293 alarmtimer(0); 1294 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1295 write(fileno(ttyout), msgbuf, len); 1296 siglongjmp(httpabort, 1); 1297 } 1298 1299 /* 1300 * Retrieve ftp URL or classic ftp argument using FTP. 1301 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1302 * is still open (e.g, ftp xfer with trailing /) 1303 */ 1304 static int 1305 fetch_ftp(const char *url) 1306 { 1307 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1308 char *host, *path, *dir, *file, *user, *pass; 1309 char *port; 1310 int dirhasglob, filehasglob, rval, type, xargc; 1311 int oanonftp, oautologin; 1312 in_port_t portnum; 1313 url_t urltype; 1314 1315 host = path = dir = file = user = pass = NULL; 1316 port = NULL; 1317 rval = 1; 1318 type = TYPE_I; 1319 1320 if (STRNEQUAL(url, FTP_URL)) { 1321 if ((parse_url(url, "URL", &urltype, &user, &pass, 1322 &host, &port, &portnum, &path) == -1) || 1323 (user != NULL && *user == '\0') || 1324 EMPTYSTRING(host)) { 1325 warnx("Invalid URL `%s'", url); 1326 goto cleanup_fetch_ftp; 1327 } 1328 /* 1329 * Note: Don't url_decode(path) here. We need to keep the 1330 * distinction between "/" and "%2F" until later. 1331 */ 1332 1333 /* check for trailing ';type=[aid]' */ 1334 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1335 if (strcasecmp(cp, ";type=a") == 0) 1336 type = TYPE_A; 1337 else if (strcasecmp(cp, ";type=i") == 0) 1338 type = TYPE_I; 1339 else if (strcasecmp(cp, ";type=d") == 0) { 1340 warnx( 1341 "Directory listing via a URL is not supported"); 1342 goto cleanup_fetch_ftp; 1343 } else { 1344 warnx("Invalid suffix `%s' in URL `%s'", cp, 1345 url); 1346 goto cleanup_fetch_ftp; 1347 } 1348 *cp = 0; 1349 } 1350 } else { /* classic style `[user@]host:[file]' */ 1351 urltype = CLASSIC_URL_T; 1352 host = ftp_strdup(url); 1353 cp = strchr(host, '@'); 1354 if (cp != NULL) { 1355 *cp = '\0'; 1356 user = host; 1357 anonftp = 0; /* disable anonftp */ 1358 host = ftp_strdup(cp + 1); 1359 } 1360 cp = strchr(host, ':'); 1361 if (cp != NULL) { 1362 *cp = '\0'; 1363 path = ftp_strdup(cp + 1); 1364 } 1365 } 1366 if (EMPTYSTRING(host)) 1367 goto cleanup_fetch_ftp; 1368 1369 /* Extract the file and (if present) directory name. */ 1370 dir = path; 1371 if (! EMPTYSTRING(dir)) { 1372 /* 1373 * If we are dealing with classic `[user@]host:[path]' syntax, 1374 * then a path of the form `/file' (resulting from input of the 1375 * form `host:/file') means that we should do "CWD /" before 1376 * retrieving the file. So we set dir="/" and file="file". 1377 * 1378 * But if we are dealing with URLs like `ftp://host/path' then 1379 * a path of the form `/file' (resulting from a URL of the form 1380 * `ftp://host//file') means that we should do `CWD ' (with an 1381 * empty argument) before retrieving the file. So we set 1382 * dir="" and file="file". 1383 * 1384 * If the path does not contain / at all, we set dir=NULL. 1385 * (We get a path without any slashes if we are dealing with 1386 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1387 * 1388 * In all other cases, we set dir to a string that does not 1389 * include the final '/' that separates the dir part from the 1390 * file part of the path. (This will be the empty string if 1391 * and only if we are dealing with a path of the form `/file' 1392 * resulting from an URL of the form `ftp://host//file'.) 1393 */ 1394 cp = strrchr(dir, '/'); 1395 if (cp == dir && urltype == CLASSIC_URL_T) { 1396 file = cp + 1; 1397 dir = "/"; 1398 } else if (cp != NULL) { 1399 *cp++ = '\0'; 1400 file = cp; 1401 } else { 1402 file = dir; 1403 dir = NULL; 1404 } 1405 } else 1406 dir = NULL; 1407 if (urltype == FTP_URL_T && file != NULL) { 1408 url_decode(file); 1409 /* but still don't url_decode(dir) */ 1410 } 1411 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1412 "path `%s' dir `%s' file `%s'\n", 1413 user ? user : "<null>", pass ? pass : "<null>", 1414 host ? host : "<null>", port ? port : "<null>", 1415 path ? path : "<null>", 1416 dir ? dir : "<null>", file ? file : "<null>"); 1417 1418 dirhasglob = filehasglob = 0; 1419 if (doglob && urltype == CLASSIC_URL_T) { 1420 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1421 dirhasglob = 1; 1422 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1423 filehasglob = 1; 1424 } 1425 1426 /* Set up the connection */ 1427 oanonftp = anonftp; 1428 if (connected) 1429 disconnect(0, NULL); 1430 anonftp = oanonftp; 1431 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1432 xargv[1] = host; 1433 xargv[2] = NULL; 1434 xargc = 2; 1435 if (port) { 1436 xargv[2] = port; 1437 xargv[3] = NULL; 1438 xargc = 3; 1439 } 1440 oautologin = autologin; 1441 /* don't autologin in setpeer(), use ftp_login() below */ 1442 autologin = 0; 1443 setpeer(xargc, xargv); 1444 autologin = oautologin; 1445 if ((connected == 0) || 1446 (connected == 1 && !ftp_login(host, user, pass))) { 1447 warnx("Can't connect or login to host `%s'", host); 1448 goto cleanup_fetch_ftp; 1449 } 1450 1451 switch (type) { 1452 case TYPE_A: 1453 setascii(1, xargv); 1454 break; 1455 case TYPE_I: 1456 setbinary(1, xargv); 1457 break; 1458 default: 1459 errx(1, "fetch_ftp: unknown transfer type %d", type); 1460 } 1461 1462 /* 1463 * Change directories, if necessary. 1464 * 1465 * Note: don't use EMPTYSTRING(dir) below, because 1466 * dir=="" means something different from dir==NULL. 1467 */ 1468 if (dir != NULL && !dirhasglob) { 1469 char *nextpart; 1470 1471 /* 1472 * If we are dealing with a classic `[user@]host:[path]' 1473 * (urltype is CLASSIC_URL_T) then we have a raw directory 1474 * name (not encoded in any way) and we can change 1475 * directories in one step. 1476 * 1477 * If we are dealing with an `ftp://host/path' URL 1478 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1479 * send a separate CWD command for each unescaped "/" 1480 * in the path, and we have to interpret %hex escaping 1481 * *after* we find the slashes. It's possible to get 1482 * empty components here, (from multiple adjacent 1483 * slashes in the path) and RFC 1738 says that we should 1484 * still do `CWD ' (with a null argument) in such cases. 1485 * 1486 * Many ftp servers don't support `CWD ', so if there's an 1487 * error performing that command, bail out with a descriptive 1488 * message. 1489 * 1490 * Examples: 1491 * 1492 * host: dir="", urltype=CLASSIC_URL_T 1493 * logged in (to default directory) 1494 * host:file dir=NULL, urltype=CLASSIC_URL_T 1495 * "RETR file" 1496 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1497 * "CWD dir", logged in 1498 * ftp://host/ dir="", urltype=FTP_URL_T 1499 * logged in (to default directory) 1500 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1501 * "CWD dir", logged in 1502 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1503 * "RETR file" 1504 * ftp://host//file dir="", urltype=FTP_URL_T 1505 * "CWD ", "RETR file" 1506 * host:/file dir="/", urltype=CLASSIC_URL_T 1507 * "CWD /", "RETR file" 1508 * ftp://host///file dir="/", urltype=FTP_URL_T 1509 * "CWD ", "CWD ", "RETR file" 1510 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1511 * "CWD /", "RETR file" 1512 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1513 * "CWD foo", "RETR file" 1514 * ftp://host/foo/bar/file dir="foo/bar" 1515 * "CWD foo", "CWD bar", "RETR file" 1516 * ftp://host//foo/bar/file dir="/foo/bar" 1517 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1518 * ftp://host/foo//bar/file dir="foo//bar" 1519 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1520 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1521 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1522 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1523 * "CWD /foo", "CWD bar", "RETR file" 1524 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1525 * "CWD /foo/bar", "RETR file" 1526 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1527 * "RETR /foo/bar/file" 1528 * 1529 * Note that we don't need `dir' after this point. 1530 */ 1531 do { 1532 if (urltype == FTP_URL_T) { 1533 nextpart = strchr(dir, '/'); 1534 if (nextpart) { 1535 *nextpart = '\0'; 1536 nextpart++; 1537 } 1538 url_decode(dir); 1539 } else 1540 nextpart = NULL; 1541 DPRINTF("dir `%s', nextpart `%s'\n", 1542 dir ? dir : "<null>", 1543 nextpart ? nextpart : "<null>"); 1544 if (urltype == FTP_URL_T || *dir != '\0') { 1545 xargv[0] = "cd"; 1546 xargv[1] = dir; 1547 xargv[2] = NULL; 1548 dirchange = 0; 1549 cd(2, xargv); 1550 if (! dirchange) { 1551 if (*dir == '\0' && code == 500) 1552 fprintf(stderr, 1553 "\n" 1554 "ftp: The `CWD ' command (without a directory), which is required by\n" 1555 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1556 " conflicts with the server's conformance to RFC 959.\n" 1557 " Try the same URL without the `//' in the URL pathname.\n" 1558 "\n"); 1559 goto cleanup_fetch_ftp; 1560 } 1561 } 1562 dir = nextpart; 1563 } while (dir != NULL); 1564 } 1565 1566 if (EMPTYSTRING(file)) { 1567 rval = -1; 1568 goto cleanup_fetch_ftp; 1569 } 1570 1571 if (dirhasglob) { 1572 (void)strlcpy(rempath, dir, sizeof(rempath)); 1573 (void)strlcat(rempath, "/", sizeof(rempath)); 1574 (void)strlcat(rempath, file, sizeof(rempath)); 1575 file = rempath; 1576 } 1577 1578 /* Fetch the file(s). */ 1579 xargc = 2; 1580 xargv[0] = "get"; 1581 xargv[1] = file; 1582 xargv[2] = NULL; 1583 if (dirhasglob || filehasglob) { 1584 int ointeractive; 1585 1586 ointeractive = interactive; 1587 interactive = 0; 1588 if (restartautofetch) 1589 xargv[0] = "mreget"; 1590 else 1591 xargv[0] = "mget"; 1592 mget(xargc, xargv); 1593 interactive = ointeractive; 1594 } else { 1595 if (outfile == NULL) { 1596 cp = strrchr(file, '/'); /* find savefile */ 1597 if (cp != NULL) 1598 outfile = cp + 1; 1599 else 1600 outfile = file; 1601 } 1602 xargv[2] = (char *)outfile; 1603 xargv[3] = NULL; 1604 xargc++; 1605 if (restartautofetch) 1606 reget(xargc, xargv); 1607 else 1608 get(xargc, xargv); 1609 } 1610 1611 if ((code / 100) == COMPLETE) 1612 rval = 0; 1613 1614 cleanup_fetch_ftp: 1615 FREEPTR(port); 1616 FREEPTR(host); 1617 FREEPTR(path); 1618 FREEPTR(user); 1619 if (pass) 1620 memset(pass, 0, strlen(pass)); 1621 FREEPTR(pass); 1622 return (rval); 1623 } 1624 1625 /* 1626 * Retrieve the given file to outfile. 1627 * Supports arguments of the form: 1628 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1629 * call fetch_ftp() 1630 * "http://host/path" call fetch_url() to use HTTP 1631 * "file:///path" call fetch_url() to copy 1632 * "about:..." print a message 1633 * 1634 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1635 * is still open (e.g, ftp xfer with trailing /) 1636 */ 1637 static int 1638 go_fetch(const char *url) 1639 { 1640 char *proxy; 1641 1642 #ifndef NO_ABOUT 1643 /* 1644 * Check for about:* 1645 */ 1646 if (STRNEQUAL(url, ABOUT_URL)) { 1647 url += sizeof(ABOUT_URL) -1; 1648 if (strcasecmp(url, "ftp") == 0 || 1649 strcasecmp(url, "tnftp") == 0) { 1650 fputs( 1651 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1652 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1653 } else if (strcasecmp(url, "lukem") == 0) { 1654 fputs( 1655 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1656 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1657 } else if (strcasecmp(url, "netbsd") == 0) { 1658 fputs( 1659 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1660 "For more information, see http://www.NetBSD.org/\n", ttyout); 1661 } else if (strcasecmp(url, "version") == 0) { 1662 fprintf(ttyout, "Version: %s %s%s\n", 1663 FTP_PRODUCT, FTP_VERSION, 1664 #ifdef INET6 1665 "" 1666 #else 1667 " (-IPv6)" 1668 #endif 1669 ); 1670 } else { 1671 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1672 } 1673 fputs("\n", ttyout); 1674 return (0); 1675 } 1676 #endif 1677 1678 /* 1679 * Check for file:// and http:// URLs. 1680 */ 1681 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL)) 1682 return (fetch_url(url, NULL, NULL, NULL)); 1683 1684 /* 1685 * Try FTP URL-style and host:file arguments next. 1686 * If ftpproxy is set with an FTP URL, use fetch_url() 1687 * Othewise, use fetch_ftp(). 1688 */ 1689 proxy = getoptionvalue("ftp_proxy"); 1690 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL)) 1691 return (fetch_url(url, NULL, NULL, NULL)); 1692 1693 return (fetch_ftp(url)); 1694 } 1695 1696 /* 1697 * Retrieve multiple files from the command line, 1698 * calling go_fetch() for each file. 1699 * 1700 * If an ftp path has a trailing "/", the path will be cd-ed into and 1701 * the connection remains open, and the function will return -1 1702 * (to indicate the connection is alive). 1703 * If an error occurs the return value will be the offset+1 in 1704 * argv[] of the file that caused a problem (i.e, argv[x] 1705 * returns x+1) 1706 * Otherwise, 0 is returned if all files retrieved successfully. 1707 */ 1708 int 1709 auto_fetch(int argc, char *argv[]) 1710 { 1711 volatile int argpos, rval; 1712 1713 argpos = rval = 0; 1714 1715 if (sigsetjmp(toplevel, 1)) { 1716 if (connected) 1717 disconnect(0, NULL); 1718 if (rval > 0) 1719 rval = argpos + 1; 1720 return (rval); 1721 } 1722 (void)xsignal(SIGINT, intr); 1723 (void)xsignal(SIGPIPE, lostpeer); 1724 1725 /* 1726 * Loop through as long as there's files to fetch. 1727 */ 1728 for (; (rval == 0) && (argpos < argc); argpos++) { 1729 if (strchr(argv[argpos], ':') == NULL) 1730 break; 1731 redirect_loop = 0; 1732 if (!anonftp) 1733 anonftp = 2; /* Handle "automatic" transfers. */ 1734 rval = go_fetch(argv[argpos]); 1735 if (outfile != NULL && strcmp(outfile, "-") != 0 1736 && outfile[0] != '|') 1737 outfile = NULL; 1738 if (rval > 0) 1739 rval = argpos + 1; 1740 } 1741 1742 if (connected && rval != -1) 1743 disconnect(0, NULL); 1744 return (rval); 1745 } 1746 1747 1748 /* 1749 * Upload multiple files from the command line. 1750 * 1751 * If an error occurs the return value will be the offset+1 in 1752 * argv[] of the file that caused a problem (i.e, argv[x] 1753 * returns x+1) 1754 * Otherwise, 0 is returned if all files uploaded successfully. 1755 */ 1756 int 1757 auto_put(int argc, char **argv, const char *uploadserver) 1758 { 1759 char *uargv[4], *path, *pathsep; 1760 int uargc, rval, argpos; 1761 size_t len; 1762 1763 uargc = 0; 1764 uargv[uargc++] = "mput"; 1765 uargv[uargc++] = argv[0]; 1766 uargv[2] = uargv[3] = NULL; 1767 pathsep = NULL; 1768 rval = 1; 1769 1770 DPRINTF("auto_put: target `%s'\n", uploadserver); 1771 1772 path = ftp_strdup(uploadserver); 1773 len = strlen(path); 1774 if (path[len - 1] != '/' && path[len - 1] != ':') { 1775 /* 1776 * make sure we always pass a directory to auto_fetch 1777 */ 1778 if (argc > 1) { /* more than one file to upload */ 1779 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1780 free(path); 1781 path = (char *)ftp_malloc(len); 1782 (void)strlcpy(path, uploadserver, len); 1783 (void)strlcat(path, "/", len); 1784 } else { /* single file to upload */ 1785 uargv[0] = "put"; 1786 pathsep = strrchr(path, '/'); 1787 if (pathsep == NULL) { 1788 pathsep = strrchr(path, ':'); 1789 if (pathsep == NULL) { 1790 warnx("Invalid URL `%s'", path); 1791 goto cleanup_auto_put; 1792 } 1793 pathsep++; 1794 uargv[2] = ftp_strdup(pathsep); 1795 pathsep[0] = '/'; 1796 } else 1797 uargv[2] = ftp_strdup(pathsep + 1); 1798 pathsep[1] = '\0'; 1799 uargc++; 1800 } 1801 } 1802 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 1803 path, uargv[2] ? uargv[2] : "<null>"); 1804 1805 /* connect and cwd */ 1806 rval = auto_fetch(1, &path); 1807 if(rval >= 0) 1808 goto cleanup_auto_put; 1809 1810 rval = 0; 1811 1812 /* target filename provided; upload 1 file */ 1813 /* XXX : is this the best way? */ 1814 if (uargc == 3) { 1815 uargv[1] = argv[0]; 1816 put(uargc, uargv); 1817 if ((code / 100) != COMPLETE) 1818 rval = 1; 1819 } else { /* otherwise a target dir: upload all files to it */ 1820 for(argpos = 0; argv[argpos] != NULL; argpos++) { 1821 uargv[1] = argv[argpos]; 1822 mput(uargc, uargv); 1823 if ((code / 100) != COMPLETE) { 1824 rval = argpos + 1; 1825 break; 1826 } 1827 } 1828 } 1829 1830 cleanup_auto_put: 1831 free(path); 1832 FREEPTR(uargv[2]); 1833 return (rval); 1834 } 1835