1 /* $NetBSD: fetch.c,v 1.163 2005/06/29 02:31:19 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2005 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * 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 1.163 2005/06/29 02:31:19 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 preceeded 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 *)xmalloc(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 user[strlen(user) - 1] = '\0'; 200 } 201 if (gpass != NULL) 202 pass = (char *)gpass; 203 else 204 pass = getpass("Password: "); 205 206 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 207 clear = (char *)xmalloc(clen); 208 (void)strlcpy(clear, user, clen); 209 (void)strlcat(clear, ":", clen); 210 (void)strlcat(clear, pass, clen); 211 if (gpass == NULL) 212 memset(pass, 0, strlen(pass)); 213 214 /* scheme + " " + enc + "\0" */ 215 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 216 *response = (char *)xmalloc(rlen); 217 (void)strlcpy(*response, scheme, rlen); 218 len = strlcat(*response, " ", rlen); 219 /* use `clen - 1' to not encode the trailing NUL */ 220 base64_encode((unsigned char *)clear, clen - 1, 221 (unsigned char *)*response + len); 222 memset(clear, 0, clen); 223 rval = 0; 224 225 cleanup_auth_url: 226 FREEPTR(clear); 227 FREEPTR(realm); 228 return (rval); 229 } 230 231 /* 232 * Encode len bytes starting at clear using base64 encoding into encoded, 233 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 234 */ 235 static void 236 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 237 { 238 static const unsigned char enc[] = 239 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 240 unsigned char *cp; 241 int i; 242 243 cp = encoded; 244 for (i = 0; i < len; i += 3) { 245 *(cp++) = enc[((clear[i + 0] >> 2))]; 246 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 247 | ((clear[i + 1] >> 4) & 0x0f)]; 248 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 249 | ((clear[i + 2] >> 6) & 0x03)]; 250 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 251 } 252 *cp = '\0'; 253 while (i-- > len) 254 *(--cp) = '='; 255 } 256 #endif 257 258 /* 259 * Decode %xx escapes in given string, `in-place'. 260 */ 261 static void 262 url_decode(char *url) 263 { 264 unsigned char *p, *q; 265 266 if (EMPTYSTRING(url)) 267 return; 268 p = q = (unsigned char *)url; 269 270 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 271 while (*p) { 272 if (p[0] == '%' 273 && p[1] && isxdigit((unsigned char)p[1]) 274 && p[2] && isxdigit((unsigned char)p[2])) { 275 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 276 p+=3; 277 } else 278 *q++ = *p++; 279 } 280 *q = '\0'; 281 } 282 283 284 /* 285 * Parse URL of form: 286 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 287 * Returns -1 if a parse error occurred, otherwise 0. 288 * It's the caller's responsibility to url_decode() the returned 289 * user, pass and path. 290 * 291 * Sets type to url_t, each of the given char ** pointers to a 292 * malloc(3)ed strings of the relevant section, and port to 293 * the number given, or ftpport if ftp://, or httpport if http://. 294 * 295 * If <host> is surrounded by `[' and ']', it's parsed as an 296 * IPv6 address (as per RFC 2732). 297 * 298 * XXX: this is not totally RFC 1738 compliant; <path> will have the 299 * leading `/' unless it's an ftp:// URL, as this makes things easier 300 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 301 * host and the URL-path removed, but any additional leading slashes 302 * in the URL-path are retained (because they imply that we should 303 * later do "CWD" with a null argument). 304 * 305 * Examples: 306 * input URL output path 307 * --------- ----------- 308 * "ftp://host" NULL 309 * "http://host/" NULL 310 * "file://host/dir/file" "dir/file" 311 * "ftp://host/" "" 312 * "ftp://host//" NULL 313 * "ftp://host//dir/file" "/dir/file" 314 */ 315 static int 316 parse_url(const char *url, const char *desc, url_t *type, 317 char **user, char **pass, char **host, char **port, 318 in_port_t *portnum, char **path) 319 { 320 const char *origurl; 321 char *cp, *ep, *thost, *tport; 322 size_t len; 323 324 if (url == NULL || desc == NULL || type == NULL || user == NULL 325 || pass == NULL || host == NULL || port == NULL || portnum == NULL 326 || path == NULL) 327 errx(1, "parse_url: invoked with NULL argument!"); 328 329 origurl = url; 330 *type = UNKNOWN_URL_T; 331 *user = *pass = *host = *port = *path = NULL; 332 *portnum = 0; 333 tport = NULL; 334 335 if (STRNEQUAL(url, HTTP_URL)) { 336 url += sizeof(HTTP_URL) - 1; 337 *type = HTTP_URL_T; 338 *portnum = HTTP_PORT; 339 tport = httpport; 340 } else if (STRNEQUAL(url, FTP_URL)) { 341 url += sizeof(FTP_URL) - 1; 342 *type = FTP_URL_T; 343 *portnum = FTP_PORT; 344 tport = ftpport; 345 } else if (STRNEQUAL(url, FILE_URL)) { 346 url += sizeof(FILE_URL) - 1; 347 *type = FILE_URL_T; 348 } else { 349 warnx("Invalid %s `%s'", desc, url); 350 cleanup_parse_url: 351 FREEPTR(*user); 352 if (*pass != NULL) 353 memset(*pass, 0, strlen(*pass)); 354 FREEPTR(*pass); 355 FREEPTR(*host); 356 FREEPTR(*port); 357 FREEPTR(*path); 358 return (-1); 359 } 360 361 if (*url == '\0') 362 return (0); 363 364 /* find [user[:pass]@]host[:port] */ 365 ep = strchr(url, '/'); 366 if (ep == NULL) 367 thost = xstrdup(url); 368 else { 369 len = ep - url; 370 thost = (char *)xmalloc(len + 1); 371 (void)strlcpy(thost, url, len + 1); 372 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 373 ep++; 374 *path = xstrdup(ep); 375 } 376 377 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 378 if (cp != NULL) { 379 if (*type == FTP_URL_T) 380 anonftp = 0; /* disable anonftp */ 381 *user = thost; 382 *cp = '\0'; 383 thost = xstrdup(cp + 1); 384 cp = strchr(*user, ':'); 385 if (cp != NULL) { 386 *cp = '\0'; 387 *pass = xstrdup(cp + 1); 388 } 389 url_decode(*user); 390 if (*pass) 391 url_decode(*pass); 392 } 393 394 #ifdef INET6 395 /* 396 * Check if thost is an encoded IPv6 address, as per 397 * RFC 2732: 398 * `[' ipv6-address ']' 399 */ 400 if (*thost == '[') { 401 cp = thost + 1; 402 if ((ep = strchr(cp, ']')) == NULL || 403 (ep[1] != '\0' && ep[1] != ':')) { 404 warnx("Invalid address `%s' in %s `%s'", 405 thost, desc, origurl); 406 goto cleanup_parse_url; 407 } 408 len = ep - cp; /* change `[xyz]' -> `xyz' */ 409 memmove(thost, thost + 1, len); 410 thost[len] = '\0'; 411 if (! isipv6addr(thost)) { 412 warnx("Invalid IPv6 address `%s' in %s `%s'", 413 thost, desc, origurl); 414 goto cleanup_parse_url; 415 } 416 cp = ep + 1; 417 if (*cp == ':') 418 cp++; 419 else 420 cp = NULL; 421 } else 422 #endif /* INET6 */ 423 if ((cp = strchr(thost, ':')) != NULL) 424 *cp++ = '\0'; 425 *host = thost; 426 427 /* look for [:port] */ 428 if (cp != NULL) { 429 long nport; 430 431 nport = parseport(cp, -1); 432 if (nport == -1) { 433 warnx("Unknown port `%s' in %s `%s'", 434 cp, desc, origurl); 435 goto cleanup_parse_url; 436 } 437 *portnum = nport; 438 tport = cp; 439 } 440 441 if (tport != NULL) 442 *port = xstrdup(tport); 443 if (*path == NULL) 444 *path = xstrdup("/"); 445 446 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 447 "path `%s'\n", 448 *user ? *user : "<null>", *pass ? *pass : "<null>", 449 *host ? *host : "<null>", *port ? *port : "<null>", 450 *portnum ? *portnum : -1, *path ? *path : "<null>"); 451 452 return (0); 453 } 454 455 sigjmp_buf httpabort; 456 457 /* 458 * Retrieve URL, via a proxy if necessary, using HTTP. 459 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 460 * http_proxy as appropriate. 461 * Supports HTTP redirects. 462 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 463 * is still open (e.g, ftp xfer with trailing /) 464 */ 465 static int 466 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 467 { 468 struct addrinfo hints, *res, *res0 = NULL; 469 int error; 470 char hbuf[NI_MAXHOST]; 471 volatile sigfunc oldintr, oldintp; 472 volatile int s; 473 struct stat sb; 474 int ischunked, isproxy, rval, hcode; 475 size_t len; 476 static size_t bufsize; 477 static char *xferbuf; 478 const char *cp, *token; 479 char *ep, *buf, *savefile; 480 char *auth, *location, *message; 481 char *user, *pass, *host, *port, *path, *decodedpath; 482 char *puser, *ppass, *useragent; 483 off_t hashbytes, rangestart, rangeend, entitylen; 484 int (*closefunc)(FILE *); 485 FILE *fin, *fout; 486 time_t mtime; 487 url_t urltype; 488 in_port_t portnum; 489 490 oldintr = oldintp = NULL; 491 closefunc = NULL; 492 fin = fout = NULL; 493 s = -1; 494 buf = savefile = NULL; 495 auth = location = message = NULL; 496 ischunked = isproxy = hcode = 0; 497 rval = 1; 498 user = pass = host = path = decodedpath = puser = ppass = NULL; 499 500 #ifdef __GNUC__ /* shut up gcc warnings */ 501 (void)&closefunc; 502 (void)&fin; 503 (void)&fout; 504 (void)&buf; 505 (void)&savefile; 506 (void)&rval; 507 (void)&isproxy; 508 (void)&hcode; 509 (void)&ischunked; 510 (void)&message; 511 (void)&location; 512 (void)&auth; 513 (void)&decodedpath; 514 #endif 515 516 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 517 &portnum, &path) == -1) 518 goto cleanup_fetch_url; 519 520 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 521 && strcasecmp(host, "localhost") != 0) { 522 warnx("No support for non local file URL `%s'", url); 523 goto cleanup_fetch_url; 524 } 525 526 if (EMPTYSTRING(path)) { 527 if (urltype == FTP_URL_T) { 528 rval = fetch_ftp(url); 529 goto cleanup_fetch_url; 530 } 531 if (urltype != HTTP_URL_T || outfile == NULL) { 532 warnx("Invalid URL (no file after host) `%s'", url); 533 goto cleanup_fetch_url; 534 } 535 } 536 537 decodedpath = xstrdup(path); 538 url_decode(decodedpath); 539 540 if (outfile) 541 savefile = xstrdup(outfile); 542 else { 543 cp = strrchr(decodedpath, '/'); /* find savefile */ 544 if (cp != NULL) 545 savefile = xstrdup(cp + 1); 546 else 547 savefile = xstrdup(decodedpath); 548 } 549 if (EMPTYSTRING(savefile)) { 550 if (urltype == FTP_URL_T) { 551 rval = fetch_ftp(url); 552 goto cleanup_fetch_url; 553 } 554 warnx("no file after directory (you must specify an " 555 "output file) `%s'", url); 556 goto cleanup_fetch_url; 557 } else { 558 DPRINTF("savefile `%s'\n", savefile); 559 } 560 561 restart_point = 0; 562 filesize = -1; 563 rangestart = rangeend = entitylen = -1; 564 mtime = -1; 565 if (restartautofetch) { 566 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 567 stat(savefile, &sb) == 0) 568 restart_point = sb.st_size; 569 } 570 if (urltype == FILE_URL_T) { /* file:// URLs */ 571 direction = "copied"; 572 fin = fopen(decodedpath, "r"); 573 if (fin == NULL) { 574 warn("Cannot open file `%s'", decodedpath); 575 goto cleanup_fetch_url; 576 } 577 if (fstat(fileno(fin), &sb) == 0) { 578 mtime = sb.st_mtime; 579 filesize = sb.st_size; 580 } 581 if (restart_point) { 582 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 583 warn("Can't lseek to restart `%s'", 584 decodedpath); 585 goto cleanup_fetch_url; 586 } 587 } 588 if (verbose) { 589 fprintf(ttyout, "Copying %s", decodedpath); 590 if (restart_point) 591 fprintf(ttyout, " (restarting at " LLF ")", 592 (LLT)restart_point); 593 fputs("\n", ttyout); 594 } 595 } else { /* ftp:// or http:// URLs */ 596 char *leading; 597 int hasleading; 598 599 if (proxyenv == NULL) { 600 if (urltype == HTTP_URL_T) 601 proxyenv = getoptionvalue("http_proxy"); 602 else if (urltype == FTP_URL_T) 603 proxyenv = getoptionvalue("ftp_proxy"); 604 } 605 direction = "retrieved"; 606 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 607 url_t purltype; 608 char *phost, *ppath; 609 char *pport, *no_proxy; 610 611 isproxy = 1; 612 613 /* check URL against list of no_proxied sites */ 614 no_proxy = getoptionvalue("no_proxy"); 615 if (! EMPTYSTRING(no_proxy)) { 616 char *np, *np_copy; 617 long np_port; 618 size_t hlen, plen; 619 620 np_copy = xstrdup(no_proxy); 621 hlen = strlen(host); 622 while ((cp = strsep(&np_copy, " ,")) != NULL) { 623 if (*cp == '\0') 624 continue; 625 if ((np = strrchr(cp, ':')) != NULL) { 626 *np = '\0'; 627 np_port = 628 strtol(np + 1, &ep, 10); 629 if (*ep != '\0') 630 continue; 631 if (np_port != portnum) 632 continue; 633 } 634 plen = strlen(cp); 635 if (hlen < plen) 636 continue; 637 if (strncasecmp(host + hlen - plen, 638 cp, plen) == 0) { 639 isproxy = 0; 640 break; 641 } 642 } 643 FREEPTR(np_copy); 644 if (isproxy == 0 && urltype == FTP_URL_T) { 645 rval = fetch_ftp(url); 646 goto cleanup_fetch_url; 647 } 648 } 649 650 if (isproxy) { 651 if (parse_url(proxyenv, "proxy URL", &purltype, 652 &puser, &ppass, &phost, &pport, &portnum, 653 &ppath) == -1) 654 goto cleanup_fetch_url; 655 656 if ((purltype != HTTP_URL_T 657 && purltype != FTP_URL_T) || 658 EMPTYSTRING(phost) || 659 (! EMPTYSTRING(ppath) 660 && strcmp(ppath, "/") != 0)) { 661 warnx("Malformed proxy URL `%s'", 662 proxyenv); 663 FREEPTR(phost); 664 FREEPTR(pport); 665 FREEPTR(ppath); 666 goto cleanup_fetch_url; 667 } 668 if (isipv6addr(host) && 669 strchr(host, '%') != NULL) { 670 warnx( 671 "Scoped address notation `%s' disallowed via web proxy", 672 host); 673 FREEPTR(phost); 674 FREEPTR(pport); 675 FREEPTR(ppath); 676 goto cleanup_fetch_url; 677 } 678 679 FREEPTR(host); 680 host = phost; 681 FREEPTR(port); 682 port = pport; 683 FREEPTR(path); 684 path = xstrdup(url); 685 FREEPTR(ppath); 686 } 687 } /* ! EMPTYSTRING(proxyenv) */ 688 689 memset(&hints, 0, sizeof(hints)); 690 hints.ai_flags = 0; 691 hints.ai_family = family; 692 hints.ai_socktype = SOCK_STREAM; 693 hints.ai_protocol = 0; 694 error = getaddrinfo(host, NULL, &hints, &res0); 695 if (error) { 696 warnx("%s: %s", host, gai_strerror(error)); 697 goto cleanup_fetch_url; 698 } 699 if (res0->ai_canonname) 700 host = res0->ai_canonname; 701 702 s = -1; 703 for (res = res0; res; res = res->ai_next) { 704 /* 705 * see comment in hookup() 706 */ 707 ai_unmapped(res); 708 if (getnameinfo(res->ai_addr, res->ai_addrlen, 709 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 710 strlcpy(hbuf, "invalid", sizeof(hbuf)); 711 712 if (verbose && res0->ai_next) { 713 fprintf(ttyout, "Trying %s...\n", hbuf); 714 } 715 716 ((struct sockaddr_in *)res->ai_addr)->sin_port = 717 htons(portnum); 718 s = socket(res->ai_family, SOCK_STREAM, 719 res->ai_protocol); 720 if (s < 0) { 721 warn("Can't create socket"); 722 continue; 723 } 724 725 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 726 warn("Connect to address `%s'", hbuf); 727 close(s); 728 s = -1; 729 continue; 730 } 731 732 /* success */ 733 break; 734 } 735 736 if (s < 0) { 737 warn("Can't connect to %s", host); 738 goto cleanup_fetch_url; 739 } 740 741 fin = fdopen(s, "r+"); 742 /* 743 * Construct and send the request. 744 */ 745 if (verbose) 746 fprintf(ttyout, "Requesting %s\n", url); 747 leading = " ("; 748 hasleading = 0; 749 if (isproxy) { 750 if (verbose) { 751 fprintf(ttyout, "%svia %s:%s", leading, 752 host, port); 753 leading = ", "; 754 hasleading++; 755 } 756 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 757 if (flushcache) 758 fprintf(fin, "Pragma: no-cache\r\n"); 759 } else { 760 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 761 if (strchr(host, ':')) { 762 char *h, *p; 763 764 /* 765 * strip off IPv6 scope identifier, since it is 766 * local to the node 767 */ 768 h = xstrdup(host); 769 if (isipv6addr(h) && 770 (p = strchr(h, '%')) != NULL) { 771 *p = '\0'; 772 } 773 fprintf(fin, "Host: [%s]", h); 774 free(h); 775 } else 776 fprintf(fin, "Host: %s", host); 777 if (portnum != HTTP_PORT) 778 fprintf(fin, ":%u", portnum); 779 fprintf(fin, "\r\n"); 780 fprintf(fin, "Accept: */*\r\n"); 781 fprintf(fin, "Connection: close\r\n"); 782 if (restart_point) { 783 fputs(leading, ttyout); 784 fprintf(fin, "Range: bytes=" LLF "-\r\n", 785 (LLT)restart_point); 786 fprintf(ttyout, "restarting at " LLF, 787 (LLT)restart_point); 788 leading = ", "; 789 hasleading++; 790 } 791 if (flushcache) 792 fprintf(fin, "Cache-Control: no-cache\r\n"); 793 } 794 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 795 fprintf(fin, "User-Agent: %s\r\n", useragent); 796 } else { 797 fprintf(fin, "User-Agent: %s/%s\r\n", 798 FTP_PRODUCT, FTP_VERSION); 799 } 800 if (wwwauth) { 801 if (verbose) { 802 fprintf(ttyout, "%swith authorization", 803 leading); 804 leading = ", "; 805 hasleading++; 806 } 807 fprintf(fin, "Authorization: %s\r\n", wwwauth); 808 } 809 if (proxyauth) { 810 if (verbose) { 811 fprintf(ttyout, 812 "%swith proxy authorization", leading); 813 leading = ", "; 814 hasleading++; 815 } 816 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 817 } 818 if (verbose && hasleading) 819 fputs(")\n", ttyout); 820 fprintf(fin, "\r\n"); 821 if (fflush(fin) == EOF) { 822 warn("Writing HTTP request"); 823 goto cleanup_fetch_url; 824 } 825 826 /* Read the response */ 827 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 828 warn("Receiving HTTP reply"); 829 goto cleanup_fetch_url; 830 } 831 while (len > 0 && (ISLWS(buf[len-1]))) 832 buf[--len] = '\0'; 833 DPRINTF("received `%s'\n", buf); 834 835 /* Determine HTTP response code */ 836 cp = strchr(buf, ' '); 837 if (cp == NULL) 838 goto improper; 839 else 840 cp++; 841 hcode = strtol(cp, &ep, 10); 842 if (*ep != '\0' && !isspace((unsigned char)*ep)) 843 goto improper; 844 message = xstrdup(cp); 845 846 /* Read the rest of the header. */ 847 while (1) { 848 FREEPTR(buf); 849 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 850 == NULL) { 851 warn("Receiving HTTP reply"); 852 goto cleanup_fetch_url; 853 } 854 while (len > 0 && (ISLWS(buf[len-1]))) 855 buf[--len] = '\0'; 856 if (len == 0) 857 break; 858 DPRINTF("received `%s'\n", buf); 859 860 /* 861 * Look for some headers 862 */ 863 864 cp = buf; 865 866 if (match_token(&cp, "Content-Length:")) { 867 filesize = STRTOLL(cp, &ep, 10); 868 if (filesize < 0 || *ep != '\0') 869 goto improper; 870 DPRINTF("parsed len as: " LLF "\n", 871 (LLT)filesize); 872 873 } else if (match_token(&cp, "Content-Range:")) { 874 if (! match_token(&cp, "bytes")) 875 goto improper; 876 877 if (*cp == '*') 878 cp++; 879 else { 880 rangestart = STRTOLL(cp, &ep, 10); 881 if (rangestart < 0 || *ep != '-') 882 goto improper; 883 cp = ep + 1; 884 rangeend = STRTOLL(cp, &ep, 10); 885 if (rangeend < 0 || rangeend < rangestart) 886 goto improper; 887 cp = ep; 888 } 889 if (*cp != '/') 890 goto improper; 891 cp++; 892 if (*cp == '*') 893 cp++; 894 else { 895 entitylen = STRTOLL(cp, &ep, 10); 896 if (entitylen < 0) 897 goto improper; 898 cp = ep; 899 } 900 if (*cp != '\0') 901 goto improper; 902 903 #ifndef NO_DEBUG 904 if (debug) { 905 fprintf(ttyout, "parsed range as: "); 906 if (rangestart == -1) 907 fprintf(ttyout, "*"); 908 else 909 fprintf(ttyout, LLF "-" LLF, 910 (LLT)rangestart, 911 (LLT)rangeend); 912 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 913 } 914 #endif 915 if (! restart_point) { 916 warnx( 917 "Received unexpected Content-Range header"); 918 goto cleanup_fetch_url; 919 } 920 921 } else if (match_token(&cp, "Last-Modified:")) { 922 struct tm parsed; 923 char *t; 924 925 /* RFC 1123 */ 926 if ((t = strptime(cp, 927 "%a, %d %b %Y %H:%M:%S GMT", 928 &parsed)) 929 /* RFC 850 */ 930 || (t = strptime(cp, 931 "%a, %d-%b-%y %H:%M:%S GMT", 932 &parsed)) 933 /* asctime */ 934 || (t = strptime(cp, 935 "%a, %b %d %H:%M:%S %Y", 936 &parsed))) { 937 parsed.tm_isdst = -1; 938 if (*t == '\0') 939 mtime = timegm(&parsed); 940 #ifndef NO_DEBUG 941 if (debug && mtime != -1) { 942 fprintf(ttyout, 943 "parsed date as: %s", 944 ctime(&mtime)); 945 } 946 #endif 947 } 948 949 } else if (match_token(&cp, "Location:")) { 950 location = xstrdup(cp); 951 DPRINTF("parsed location as `%s'\n", cp); 952 953 } else if (match_token(&cp, "Transfer-Encoding:")) { 954 if (match_token(&cp, "binary")) { 955 warnx( 956 "Bogus transfer encoding - `binary' (fetching anyway)"); 957 continue; 958 } 959 if (! (token = match_token(&cp, "chunked"))) { 960 warnx( 961 "Unsupported transfer encoding - `%s'", 962 token); 963 goto cleanup_fetch_url; 964 } 965 ischunked++; 966 DPRINTF("using chunked encoding\n"); 967 968 } else if (match_token(&cp, "Proxy-Authenticate:") 969 || match_token(&cp, "WWW-Authenticate:")) { 970 if (! (token = match_token(&cp, "Basic"))) { 971 DPRINTF( 972 "skipping unknown auth scheme `%s'\n", 973 token); 974 continue; 975 } 976 FREEPTR(auth); 977 auth = xstrdup(token); 978 DPRINTF("parsed auth as `%s'\n", cp); 979 } 980 981 } 982 /* finished parsing header */ 983 FREEPTR(buf); 984 985 switch (hcode) { 986 case 200: 987 break; 988 case 206: 989 if (! restart_point) { 990 warnx("Not expecting partial content header"); 991 goto cleanup_fetch_url; 992 } 993 break; 994 case 300: 995 case 301: 996 case 302: 997 case 303: 998 case 305: 999 if (EMPTYSTRING(location)) { 1000 warnx( 1001 "No redirection Location provided by server"); 1002 goto cleanup_fetch_url; 1003 } 1004 if (redirect_loop++ > 5) { 1005 warnx("Too many redirections requested"); 1006 goto cleanup_fetch_url; 1007 } 1008 if (hcode == 305) { 1009 if (verbose) 1010 fprintf(ttyout, "Redirected via %s\n", 1011 location); 1012 rval = fetch_url(url, location, 1013 proxyauth, wwwauth); 1014 } else { 1015 if (verbose) 1016 fprintf(ttyout, "Redirected to %s\n", 1017 location); 1018 rval = go_fetch(location); 1019 } 1020 goto cleanup_fetch_url; 1021 #ifndef NO_AUTH 1022 case 401: 1023 case 407: 1024 { 1025 char **authp; 1026 char *auser, *apass; 1027 1028 if (hcode == 401) { 1029 authp = &wwwauth; 1030 auser = user; 1031 apass = pass; 1032 } else { 1033 authp = &proxyauth; 1034 auser = puser; 1035 apass = ppass; 1036 } 1037 if (verbose || *authp == NULL || 1038 auser == NULL || apass == NULL) 1039 fprintf(ttyout, "%s\n", message); 1040 if (EMPTYSTRING(auth)) { 1041 warnx( 1042 "No authentication challenge provided by server"); 1043 goto cleanup_fetch_url; 1044 } 1045 if (*authp != NULL) { 1046 char reply[10]; 1047 1048 fprintf(ttyout, 1049 "Authorization failed. Retry (y/n)? "); 1050 if (getline(stdin, reply, sizeof(reply), NULL) 1051 < 0) { 1052 goto cleanup_fetch_url; 1053 } 1054 if (tolower((unsigned char)reply[0]) != 'y') 1055 goto cleanup_fetch_url; 1056 auser = NULL; 1057 apass = NULL; 1058 } 1059 if (auth_url(auth, authp, auser, apass) == 0) { 1060 rval = fetch_url(url, proxyenv, 1061 proxyauth, wwwauth); 1062 memset(*authp, 0, strlen(*authp)); 1063 FREEPTR(*authp); 1064 } 1065 goto cleanup_fetch_url; 1066 } 1067 #endif 1068 default: 1069 if (message) 1070 warnx("Error retrieving file - `%s'", message); 1071 else 1072 warnx("Unknown error retrieving file"); 1073 goto cleanup_fetch_url; 1074 } 1075 } /* end of ftp:// or http:// specific setup */ 1076 1077 /* Open the output file. */ 1078 if (strcmp(savefile, "-") == 0) { 1079 fout = stdout; 1080 } else if (*savefile == '|') { 1081 oldintp = xsignal(SIGPIPE, SIG_IGN); 1082 fout = popen(savefile + 1, "w"); 1083 if (fout == NULL) { 1084 warn("Can't run `%s'", savefile + 1); 1085 goto cleanup_fetch_url; 1086 } 1087 closefunc = pclose; 1088 } else { 1089 if ((rangeend != -1 && rangeend <= restart_point) || 1090 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1091 /* already done */ 1092 if (verbose) 1093 fprintf(ttyout, "already done\n"); 1094 rval = 0; 1095 goto cleanup_fetch_url; 1096 } 1097 if (restart_point && rangestart != -1) { 1098 if (entitylen != -1) 1099 filesize = entitylen; 1100 if (rangestart != restart_point) { 1101 warnx( 1102 "Size of `%s' differs from save file `%s'", 1103 url, savefile); 1104 goto cleanup_fetch_url; 1105 } 1106 fout = fopen(savefile, "a"); 1107 } else 1108 fout = fopen(savefile, "w"); 1109 if (fout == NULL) { 1110 warn("Can't open `%s'", savefile); 1111 goto cleanup_fetch_url; 1112 } 1113 closefunc = fclose; 1114 } 1115 1116 /* Trap signals */ 1117 if (sigsetjmp(httpabort, 1)) 1118 goto cleanup_fetch_url; 1119 (void)xsignal(SIGQUIT, psummary); 1120 oldintr = xsignal(SIGINT, aborthttp); 1121 1122 if (rcvbuf_size > bufsize) { 1123 if (xferbuf) 1124 (void)free(xferbuf); 1125 bufsize = rcvbuf_size; 1126 xferbuf = xmalloc(bufsize); 1127 } 1128 1129 bytes = 0; 1130 hashbytes = mark; 1131 progressmeter(-1); 1132 1133 /* Finally, suck down the file. */ 1134 do { 1135 long chunksize; 1136 1137 chunksize = 0; 1138 /* read chunksize */ 1139 if (ischunked) { 1140 if (fgets(xferbuf, bufsize, fin) == NULL) { 1141 warnx("Unexpected EOF reading chunksize"); 1142 goto cleanup_fetch_url; 1143 } 1144 chunksize = strtol(xferbuf, &ep, 16); 1145 1146 /* 1147 * XXX: Work around bug in Apache 1.3.9 and 1148 * 1.3.11, which incorrectly put trailing 1149 * space after the chunksize. 1150 */ 1151 while (*ep == ' ') 1152 ep++; 1153 1154 if (strcmp(ep, "\r\n") != 0) { 1155 warnx("Unexpected data following chunksize"); 1156 goto cleanup_fetch_url; 1157 } 1158 DPRINTF("got chunksize of " LLF "\n", (LLT)chunksize); 1159 if (chunksize == 0) 1160 break; 1161 } 1162 /* transfer file or chunk */ 1163 while (1) { 1164 struct timeval then, now, td; 1165 off_t bufrem; 1166 1167 if (rate_get) 1168 (void)gettimeofday(&then, NULL); 1169 bufrem = rate_get ? rate_get : bufsize; 1170 if (ischunked) 1171 bufrem = MIN(chunksize, bufrem); 1172 while (bufrem > 0) { 1173 len = fread(xferbuf, sizeof(char), 1174 MIN(bufsize, bufrem), fin); 1175 if (len <= 0) 1176 goto chunkdone; 1177 bytes += len; 1178 bufrem -= len; 1179 if (fwrite(xferbuf, sizeof(char), len, fout) 1180 != len) { 1181 warn("Writing `%s'", savefile); 1182 goto cleanup_fetch_url; 1183 } 1184 if (hash && !progress) { 1185 while (bytes >= hashbytes) { 1186 (void)putc('#', ttyout); 1187 hashbytes += mark; 1188 } 1189 (void)fflush(ttyout); 1190 } 1191 if (ischunked) { 1192 chunksize -= len; 1193 if (chunksize <= 0) 1194 break; 1195 } 1196 } 1197 if (rate_get) { 1198 while (1) { 1199 (void)gettimeofday(&now, NULL); 1200 timersub(&now, &then, &td); 1201 if (td.tv_sec > 0) 1202 break; 1203 usleep(1000000 - td.tv_usec); 1204 } 1205 } 1206 if (ischunked && chunksize <= 0) 1207 break; 1208 } 1209 /* read CRLF after chunk*/ 1210 chunkdone: 1211 if (ischunked) { 1212 if (fgets(xferbuf, bufsize, fin) == NULL) 1213 break; 1214 if (strcmp(xferbuf, "\r\n") != 0) { 1215 warnx("Unexpected data following chunk"); 1216 goto cleanup_fetch_url; 1217 } 1218 } 1219 } while (ischunked); 1220 if (hash && !progress && bytes > 0) { 1221 if (bytes < mark) 1222 (void)putc('#', ttyout); 1223 (void)putc('\n', ttyout); 1224 } 1225 if (ferror(fin)) { 1226 warn("Reading file"); 1227 goto cleanup_fetch_url; 1228 } 1229 progressmeter(1); 1230 (void)fflush(fout); 1231 if (closefunc == fclose && mtime != -1) { 1232 struct timeval tval[2]; 1233 1234 (void)gettimeofday(&tval[0], NULL); 1235 tval[1].tv_sec = mtime; 1236 tval[1].tv_usec = 0; 1237 (*closefunc)(fout); 1238 fout = NULL; 1239 1240 if (utimes(savefile, tval) == -1) { 1241 fprintf(ttyout, 1242 "Can't change modification time to %s", 1243 asctime(localtime(&mtime))); 1244 } 1245 } 1246 if (bytes > 0) 1247 ptransfer(0); 1248 bytes = 0; 1249 1250 rval = 0; 1251 goto cleanup_fetch_url; 1252 1253 improper: 1254 warnx("Improper response from `%s'", host); 1255 1256 cleanup_fetch_url: 1257 if (oldintr) 1258 (void)xsignal(SIGINT, oldintr); 1259 if (oldintp) 1260 (void)xsignal(SIGPIPE, oldintp); 1261 if (fin != NULL) 1262 fclose(fin); 1263 else if (s != -1) 1264 close(s); 1265 if (closefunc != NULL && fout != NULL) 1266 (*closefunc)(fout); 1267 if (res0) 1268 freeaddrinfo(res0); 1269 FREEPTR(savefile); 1270 FREEPTR(user); 1271 if (pass != NULL) 1272 memset(pass, 0, strlen(pass)); 1273 FREEPTR(pass); 1274 FREEPTR(host); 1275 FREEPTR(port); 1276 FREEPTR(path); 1277 FREEPTR(decodedpath); 1278 FREEPTR(puser); 1279 if (ppass != NULL) 1280 memset(ppass, 0, strlen(ppass)); 1281 FREEPTR(ppass); 1282 FREEPTR(buf); 1283 FREEPTR(auth); 1284 FREEPTR(location); 1285 FREEPTR(message); 1286 return (rval); 1287 } 1288 1289 /* 1290 * Abort a HTTP retrieval 1291 */ 1292 void 1293 aborthttp(int notused) 1294 { 1295 char msgbuf[100]; 1296 size_t len; 1297 1298 sigint_raised = 1; 1299 alarmtimer(0); 1300 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1301 write(fileno(ttyout), msgbuf, len); 1302 siglongjmp(httpabort, 1); 1303 } 1304 1305 /* 1306 * Retrieve ftp URL or classic ftp argument using FTP. 1307 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1308 * is still open (e.g, ftp xfer with trailing /) 1309 */ 1310 static int 1311 fetch_ftp(const char *url) 1312 { 1313 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1314 char *host, *path, *dir, *file, *user, *pass; 1315 char *port; 1316 int dirhasglob, filehasglob, rval, type, xargc; 1317 int oanonftp, oautologin; 1318 in_port_t portnum; 1319 url_t urltype; 1320 1321 host = path = dir = file = user = pass = NULL; 1322 port = NULL; 1323 rval = 1; 1324 type = TYPE_I; 1325 1326 if (STRNEQUAL(url, FTP_URL)) { 1327 if ((parse_url(url, "URL", &urltype, &user, &pass, 1328 &host, &port, &portnum, &path) == -1) || 1329 (user != NULL && *user == '\0') || 1330 EMPTYSTRING(host)) { 1331 warnx("Invalid URL `%s'", url); 1332 goto cleanup_fetch_ftp; 1333 } 1334 /* 1335 * Note: Don't url_decode(path) here. We need to keep the 1336 * distinction between "/" and "%2F" until later. 1337 */ 1338 1339 /* check for trailing ';type=[aid]' */ 1340 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1341 if (strcasecmp(cp, ";type=a") == 0) 1342 type = TYPE_A; 1343 else if (strcasecmp(cp, ";type=i") == 0) 1344 type = TYPE_I; 1345 else if (strcasecmp(cp, ";type=d") == 0) { 1346 warnx( 1347 "Directory listing via a URL is not supported"); 1348 goto cleanup_fetch_ftp; 1349 } else { 1350 warnx("Invalid suffix `%s' in URL `%s'", cp, 1351 url); 1352 goto cleanup_fetch_ftp; 1353 } 1354 *cp = 0; 1355 } 1356 } else { /* classic style `[user@]host:[file]' */ 1357 urltype = CLASSIC_URL_T; 1358 host = xstrdup(url); 1359 cp = strchr(host, '@'); 1360 if (cp != NULL) { 1361 *cp = '\0'; 1362 user = host; 1363 anonftp = 0; /* disable anonftp */ 1364 host = xstrdup(cp + 1); 1365 } 1366 cp = strchr(host, ':'); 1367 if (cp != NULL) { 1368 *cp = '\0'; 1369 path = xstrdup(cp + 1); 1370 } 1371 } 1372 if (EMPTYSTRING(host)) 1373 goto cleanup_fetch_ftp; 1374 1375 /* Extract the file and (if present) directory name. */ 1376 dir = path; 1377 if (! EMPTYSTRING(dir)) { 1378 /* 1379 * If we are dealing with classic `[user@]host:[path]' syntax, 1380 * then a path of the form `/file' (resulting from input of the 1381 * form `host:/file') means that we should do "CWD /" before 1382 * retrieving the file. So we set dir="/" and file="file". 1383 * 1384 * But if we are dealing with URLs like `ftp://host/path' then 1385 * a path of the form `/file' (resulting from a URL of the form 1386 * `ftp://host//file') means that we should do `CWD ' (with an 1387 * empty argument) before retrieving the file. So we set 1388 * dir="" and file="file". 1389 * 1390 * If the path does not contain / at all, we set dir=NULL. 1391 * (We get a path without any slashes if we are dealing with 1392 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1393 * 1394 * In all other cases, we set dir to a string that does not 1395 * include the final '/' that separates the dir part from the 1396 * file part of the path. (This will be the empty string if 1397 * and only if we are dealing with a path of the form `/file' 1398 * resulting from an URL of the form `ftp://host//file'.) 1399 */ 1400 cp = strrchr(dir, '/'); 1401 if (cp == dir && urltype == CLASSIC_URL_T) { 1402 file = cp + 1; 1403 dir = "/"; 1404 } else if (cp != NULL) { 1405 *cp++ = '\0'; 1406 file = cp; 1407 } else { 1408 file = dir; 1409 dir = NULL; 1410 } 1411 } else 1412 dir = NULL; 1413 if (urltype == FTP_URL_T && file != NULL) { 1414 url_decode(file); 1415 /* but still don't url_decode(dir) */ 1416 } 1417 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1418 "path `%s' dir `%s' file `%s'\n", 1419 user ? user : "<null>", pass ? pass : "<null>", 1420 host ? host : "<null>", port ? port : "<null>", 1421 path ? path : "<null>", 1422 dir ? dir : "<null>", file ? file : "<null>"); 1423 1424 dirhasglob = filehasglob = 0; 1425 if (doglob && urltype == CLASSIC_URL_T) { 1426 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1427 dirhasglob = 1; 1428 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1429 filehasglob = 1; 1430 } 1431 1432 /* Set up the connection */ 1433 oanonftp = anonftp; 1434 if (connected) 1435 disconnect(0, NULL); 1436 anonftp = oanonftp; 1437 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1438 xargv[1] = host; 1439 xargv[2] = NULL; 1440 xargc = 2; 1441 if (port) { 1442 xargv[2] = port; 1443 xargv[3] = NULL; 1444 xargc = 3; 1445 } 1446 oautologin = autologin; 1447 /* don't autologin in setpeer(), use ftp_login() below */ 1448 autologin = 0; 1449 setpeer(xargc, xargv); 1450 autologin = oautologin; 1451 if ((connected == 0) || 1452 (connected == 1 && !ftp_login(host, user, pass))) { 1453 warnx("Can't connect or login to host `%s'", host); 1454 goto cleanup_fetch_ftp; 1455 } 1456 1457 switch (type) { 1458 case TYPE_A: 1459 setascii(1, xargv); 1460 break; 1461 case TYPE_I: 1462 setbinary(1, xargv); 1463 break; 1464 default: 1465 errx(1, "fetch_ftp: unknown transfer type %d", type); 1466 } 1467 1468 /* 1469 * Change directories, if necessary. 1470 * 1471 * Note: don't use EMPTYSTRING(dir) below, because 1472 * dir=="" means something different from dir==NULL. 1473 */ 1474 if (dir != NULL && !dirhasglob) { 1475 char *nextpart; 1476 1477 /* 1478 * If we are dealing with a classic `[user@]host:[path]' 1479 * (urltype is CLASSIC_URL_T) then we have a raw directory 1480 * name (not encoded in any way) and we can change 1481 * directories in one step. 1482 * 1483 * If we are dealing with an `ftp://host/path' URL 1484 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1485 * send a separate CWD command for each unescaped "/" 1486 * in the path, and we have to interpret %hex escaping 1487 * *after* we find the slashes. It's possible to get 1488 * empty components here, (from multiple adjacent 1489 * slashes in the path) and RFC 1738 says that we should 1490 * still do `CWD ' (with a null argument) in such cases. 1491 * 1492 * Many ftp servers don't support `CWD ', so if there's an 1493 * error performing that command, bail out with a descriptive 1494 * message. 1495 * 1496 * Examples: 1497 * 1498 * host: dir="", urltype=CLASSIC_URL_T 1499 * logged in (to default directory) 1500 * host:file dir=NULL, urltype=CLASSIC_URL_T 1501 * "RETR file" 1502 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1503 * "CWD dir", logged in 1504 * ftp://host/ dir="", urltype=FTP_URL_T 1505 * logged in (to default directory) 1506 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1507 * "CWD dir", logged in 1508 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1509 * "RETR file" 1510 * ftp://host//file dir="", urltype=FTP_URL_T 1511 * "CWD ", "RETR file" 1512 * host:/file dir="/", urltype=CLASSIC_URL_T 1513 * "CWD /", "RETR file" 1514 * ftp://host///file dir="/", urltype=FTP_URL_T 1515 * "CWD ", "CWD ", "RETR file" 1516 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1517 * "CWD /", "RETR file" 1518 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1519 * "CWD foo", "RETR file" 1520 * ftp://host/foo/bar/file dir="foo/bar" 1521 * "CWD foo", "CWD bar", "RETR file" 1522 * ftp://host//foo/bar/file dir="/foo/bar" 1523 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1524 * ftp://host/foo//bar/file dir="foo//bar" 1525 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1526 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1527 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1528 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1529 * "CWD /foo", "CWD bar", "RETR file" 1530 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1531 * "CWD /foo/bar", "RETR file" 1532 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1533 * "RETR /foo/bar/file" 1534 * 1535 * Note that we don't need `dir' after this point. 1536 */ 1537 do { 1538 if (urltype == FTP_URL_T) { 1539 nextpart = strchr(dir, '/'); 1540 if (nextpart) { 1541 *nextpart = '\0'; 1542 nextpart++; 1543 } 1544 url_decode(dir); 1545 } else 1546 nextpart = NULL; 1547 DPRINTF("dir `%s', nextpart `%s'\n", 1548 dir ? dir : "<null>", 1549 nextpart ? nextpart : "<null>"); 1550 if (urltype == FTP_URL_T || *dir != '\0') { 1551 xargv[0] = "cd"; 1552 xargv[1] = dir; 1553 xargv[2] = NULL; 1554 dirchange = 0; 1555 cd(2, xargv); 1556 if (! dirchange) { 1557 if (*dir == '\0' && code == 500) 1558 fprintf(stderr, 1559 "\n" 1560 "ftp: The `CWD ' command (without a directory), which is required by\n" 1561 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1562 " conflicts with the server's conformance to RFC 959.\n" 1563 " Try the same URL without the `//' in the URL pathname.\n" 1564 "\n"); 1565 goto cleanup_fetch_ftp; 1566 } 1567 } 1568 dir = nextpart; 1569 } while (dir != NULL); 1570 } 1571 1572 if (EMPTYSTRING(file)) { 1573 rval = -1; 1574 goto cleanup_fetch_ftp; 1575 } 1576 1577 if (dirhasglob) { 1578 (void)strlcpy(rempath, dir, sizeof(rempath)); 1579 (void)strlcat(rempath, "/", sizeof(rempath)); 1580 (void)strlcat(rempath, file, sizeof(rempath)); 1581 file = rempath; 1582 } 1583 1584 /* Fetch the file(s). */ 1585 xargc = 2; 1586 xargv[0] = "get"; 1587 xargv[1] = file; 1588 xargv[2] = NULL; 1589 if (dirhasglob || filehasglob) { 1590 int ointeractive; 1591 1592 ointeractive = interactive; 1593 interactive = 0; 1594 if (restartautofetch) 1595 xargv[0] = "mreget"; 1596 else 1597 xargv[0] = "mget"; 1598 mget(xargc, xargv); 1599 interactive = ointeractive; 1600 } else { 1601 if (outfile == NULL) { 1602 cp = strrchr(file, '/'); /* find savefile */ 1603 if (cp != NULL) 1604 outfile = cp + 1; 1605 else 1606 outfile = file; 1607 } 1608 xargv[2] = (char *)outfile; 1609 xargv[3] = NULL; 1610 xargc++; 1611 if (restartautofetch) 1612 reget(xargc, xargv); 1613 else 1614 get(xargc, xargv); 1615 } 1616 1617 if ((code / 100) == COMPLETE) 1618 rval = 0; 1619 1620 cleanup_fetch_ftp: 1621 FREEPTR(host); 1622 FREEPTR(path); 1623 FREEPTR(user); 1624 if (pass) 1625 memset(pass, 0, strlen(pass)); 1626 FREEPTR(pass); 1627 return (rval); 1628 } 1629 1630 /* 1631 * Retrieve the given file to outfile. 1632 * Supports arguments of the form: 1633 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1634 * call fetch_ftp() 1635 * "http://host/path" call fetch_url() to use HTTP 1636 * "file:///path" call fetch_url() to copy 1637 * "about:..." print a message 1638 * 1639 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1640 * is still open (e.g, ftp xfer with trailing /) 1641 */ 1642 static int 1643 go_fetch(const char *url) 1644 { 1645 char *proxy; 1646 1647 #ifndef NO_ABOUT 1648 /* 1649 * Check for about:* 1650 */ 1651 if (STRNEQUAL(url, ABOUT_URL)) { 1652 url += sizeof(ABOUT_URL) -1; 1653 if (strcasecmp(url, "ftp") == 0 || 1654 strcasecmp(url, "tnftp") == 0) { 1655 fputs( 1656 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1657 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1658 } else if (strcasecmp(url, "lukem") == 0) { 1659 fputs( 1660 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1661 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1662 } else if (strcasecmp(url, "netbsd") == 0) { 1663 fputs( 1664 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1665 "For more information, see http://www.NetBSD.org/\n", ttyout); 1666 } else if (strcasecmp(url, "version") == 0) { 1667 fprintf(ttyout, "Version: %s %s%s\n", 1668 FTP_PRODUCT, FTP_VERSION, 1669 #ifdef INET6 1670 "" 1671 #else 1672 " (-IPv6)" 1673 #endif 1674 ); 1675 } else { 1676 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1677 } 1678 fputs("\n", ttyout); 1679 return (0); 1680 } 1681 #endif 1682 1683 /* 1684 * Check for file:// and http:// URLs. 1685 */ 1686 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL)) 1687 return (fetch_url(url, NULL, NULL, NULL)); 1688 1689 /* 1690 * Try FTP URL-style and host:file arguments next. 1691 * If ftpproxy is set with an FTP URL, use fetch_url() 1692 * Othewise, use fetch_ftp(). 1693 */ 1694 proxy = getoptionvalue("ftp_proxy"); 1695 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL)) 1696 return (fetch_url(url, NULL, NULL, NULL)); 1697 1698 return (fetch_ftp(url)); 1699 } 1700 1701 /* 1702 * Retrieve multiple files from the command line, 1703 * calling go_fetch() for each file. 1704 * 1705 * If an ftp path has a trailing "/", the path will be cd-ed into and 1706 * the connection remains open, and the function will return -1 1707 * (to indicate the connection is alive). 1708 * If an error occurs the return value will be the offset+1 in 1709 * argv[] of the file that caused a problem (i.e, argv[x] 1710 * returns x+1) 1711 * Otherwise, 0 is returned if all files retrieved successfully. 1712 */ 1713 int 1714 auto_fetch(int argc, char *argv[]) 1715 { 1716 volatile int argpos, rval; 1717 1718 argpos = rval = 0; 1719 1720 if (sigsetjmp(toplevel, 1)) { 1721 if (connected) 1722 disconnect(0, NULL); 1723 if (rval > 0) 1724 rval = argpos + 1; 1725 return (rval); 1726 } 1727 (void)xsignal(SIGINT, intr); 1728 (void)xsignal(SIGPIPE, lostpeer); 1729 1730 /* 1731 * Loop through as long as there's files to fetch. 1732 */ 1733 for (; (rval == 0) && (argpos < argc); argpos++) { 1734 if (strchr(argv[argpos], ':') == NULL) 1735 break; 1736 redirect_loop = 0; 1737 if (!anonftp) 1738 anonftp = 2; /* Handle "automatic" transfers. */ 1739 rval = go_fetch(argv[argpos]); 1740 if (outfile != NULL && strcmp(outfile, "-") != 0 1741 && outfile[0] != '|') 1742 outfile = NULL; 1743 if (rval > 0) 1744 rval = argpos + 1; 1745 } 1746 1747 if (connected && rval != -1) 1748 disconnect(0, NULL); 1749 return (rval); 1750 } 1751 1752 1753 int 1754 auto_put(int argc, char **argv, const char *uploadserver) 1755 { 1756 char *uargv[4], *path, *pathsep; 1757 int uargc, rval; 1758 size_t len; 1759 1760 uargc = 0; 1761 uargv[uargc++] = "mput"; 1762 uargv[uargc++] = argv[0]; 1763 uargv[2] = uargv[3] = NULL; 1764 pathsep = NULL; 1765 rval = 1; 1766 1767 DPRINTF("auto_put: target `%s'\n", uploadserver); 1768 1769 path = xstrdup(uploadserver); 1770 len = strlen(path); 1771 if (path[len - 1] != '/' && path[len - 1] != ':') { 1772 /* 1773 * make sure we always pass a directory to auto_fetch 1774 */ 1775 if (argc > 1) { /* more than one file to upload */ 1776 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1777 free(path); 1778 path = (char *)xmalloc(len); 1779 (void)strlcpy(path, uploadserver, len); 1780 (void)strlcat(path, "/", len); 1781 } else { /* single file to upload */ 1782 uargv[0] = "put"; 1783 pathsep = strrchr(path, '/'); 1784 if (pathsep == NULL) { 1785 pathsep = strrchr(path, ':'); 1786 if (pathsep == NULL) { 1787 warnx("Invalid URL `%s'", path); 1788 goto cleanup_auto_put; 1789 } 1790 pathsep++; 1791 uargv[2] = xstrdup(pathsep); 1792 pathsep[0] = '/'; 1793 } else 1794 uargv[2] = xstrdup(pathsep + 1); 1795 pathsep[1] = '\0'; 1796 uargc++; 1797 } 1798 } 1799 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 1800 path, uargv[2] ? uargv[2] : "<null>"); 1801 1802 /* connect and cwd */ 1803 rval = auto_fetch(1, &path); 1804 free(path); 1805 if(rval >= 0) 1806 goto cleanup_auto_put; 1807 1808 /* XXX : is this the best way? */ 1809 if (uargc == 3) { 1810 uargv[1] = argv[0]; 1811 put(uargc, uargv); 1812 goto cleanup_auto_put; 1813 } 1814 1815 for(; argv[0] != NULL; argv++) { 1816 uargv[1] = argv[0]; 1817 mput(uargc, uargv); 1818 } 1819 rval = 0; 1820 1821 cleanup_auto_put: 1822 FREEPTR(uargv[2]); 1823 return (rval); 1824 } 1825