fetch.c revision 1.159
1 /* $NetBSD: fetch.c,v 1.159 2005/05/19 03:05:04 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2004 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 1.159 2005/05/19 03:05:04 lukem Exp $"); 45 #endif /* not lint */ 46 47 /* 48 * FTP User Program -- Command line file retrieval 49 */ 50 51 #include <sys/types.h> 52 #include <sys/param.h> 53 #include <sys/socket.h> 54 #include <sys/stat.h> 55 #include <sys/time.h> 56 57 #include <netinet/in.h> 58 59 #include <arpa/ftp.h> 60 #include <arpa/inet.h> 61 62 #include <ctype.h> 63 #include <err.h> 64 #include <errno.h> 65 #include <netdb.h> 66 #include <fcntl.h> 67 #include <stdio.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <unistd.h> 71 #include <time.h> 72 73 #include "ftp_var.h" 74 #include "version.h" 75 76 typedef enum { 77 UNKNOWN_URL_T=-1, 78 HTTP_URL_T, 79 FTP_URL_T, 80 FILE_URL_T, 81 CLASSIC_URL_T 82 } url_t; 83 84 void aborthttp(int); 85 #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; 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 if (debug) 162 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 163 164 if (! match_token(&cp, scheme)) { 165 warnx("Unsupported authentication challenge - `%s'", 166 challenge); 167 goto cleanup_auth_url; 168 } 169 170 #define REALM "realm=\"" 171 if (STRNEQUAL(cp, REALM)) 172 cp += sizeof(REALM) - 1; 173 else { 174 warnx("Unsupported authentication challenge - `%s'", 175 challenge); 176 goto cleanup_auth_url; 177 } 178 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 179 if ((ep = strchr(cp, '\"')) != NULL) { 180 size_t len = ep - cp; 181 182 realm = (char *)xmalloc(len + 1); 183 (void)strlcpy(realm, cp, len + 1); 184 } else { 185 warnx("Unsupported authentication challenge - `%s'", 186 challenge); 187 goto cleanup_auth_url; 188 } 189 190 fprintf(ttyout, "Username for `%s': ", realm); 191 if (guser != NULL) { 192 (void)strlcpy(user, guser, sizeof(user)); 193 fprintf(ttyout, "%s\n", user); 194 } else { 195 (void)fflush(ttyout); 196 if (fgets(user, sizeof(user) - 1, stdin) == NULL) { 197 clearerr(stdin); 198 goto cleanup_auth_url; 199 } 200 user[strlen(user) - 1] = '\0'; 201 } 202 if (gpass != NULL) 203 pass = (char *)gpass; 204 else 205 pass = getpass("Password: "); 206 207 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 208 clear = (char *)xmalloc(clen); 209 (void)strlcpy(clear, user, clen); 210 (void)strlcat(clear, ":", clen); 211 (void)strlcat(clear, pass, clen); 212 if (gpass == NULL) 213 memset(pass, 0, strlen(pass)); 214 215 /* scheme + " " + enc + "\0" */ 216 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 217 *response = (char *)xmalloc(rlen); 218 (void)strlcpy(*response, scheme, rlen); 219 len = strlcat(*response, " ", rlen); 220 /* use `clen - 1' to not encode the trailing NUL */ 221 base64_encode((unsigned char *)clear, clen - 1, 222 (unsigned char *)*response + len); 223 memset(clear, 0, clen); 224 rval = 0; 225 226 cleanup_auth_url: 227 FREEPTR(clear); 228 FREEPTR(realm); 229 return (rval); 230 } 231 232 /* 233 * Encode len bytes starting at clear using base64 encoding into encoded, 234 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 235 */ 236 static void 237 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 238 { 239 static const unsigned char enc[] = 240 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 241 unsigned char *cp; 242 int i; 243 244 cp = encoded; 245 for (i = 0; i < len; i += 3) { 246 *(cp++) = enc[((clear[i + 0] >> 2))]; 247 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 248 | ((clear[i + 1] >> 4) & 0x0f)]; 249 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 250 | ((clear[i + 2] >> 6) & 0x03)]; 251 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 252 } 253 *cp = '\0'; 254 while (i-- > len) 255 *(--cp) = '='; 256 } 257 #endif 258 259 /* 260 * Decode %xx escapes in given string, `in-place'. 261 */ 262 static void 263 url_decode(char *url) 264 { 265 unsigned char *p, *q; 266 267 if (EMPTYSTRING(url)) 268 return; 269 p = q = (unsigned char *)url; 270 271 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 272 while (*p) { 273 if (p[0] == '%' 274 && p[1] && isxdigit((unsigned char)p[1]) 275 && p[2] && isxdigit((unsigned char)p[2])) { 276 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 277 p+=3; 278 } else 279 *q++ = *p++; 280 } 281 *q = '\0'; 282 } 283 284 285 /* 286 * Parse URL of form: 287 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 288 * Returns -1 if a parse error occurred, otherwise 0. 289 * It's the caller's responsibility to url_decode() the returned 290 * user, pass and path. 291 * 292 * Sets type to url_t, each of the given char ** pointers to a 293 * malloc(3)ed strings of the relevant section, and port to 294 * the number given, or ftpport if ftp://, or httpport if http://. 295 * 296 * If <host> is surrounded by `[' and ']', it's parsed as an 297 * IPv6 address (as per RFC 2732). 298 * 299 * XXX: this is not totally RFC 1738 compliant; <path> will have the 300 * leading `/' unless it's an ftp:// URL, as this makes things easier 301 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 302 * host and the URL-path removed, but any additional leading slashes 303 * in the URL-path are retained (because they imply that we should 304 * later do "CWD" with a null argument). 305 * 306 * Examples: 307 * input URL output path 308 * --------- ----------- 309 * "ftp://host" NULL 310 * "http://host/" NULL 311 * "file://host/dir/file" "dir/file" 312 * "ftp://host/" "" 313 * "ftp://host//" NULL 314 * "ftp://host//dir/file" "/dir/file" 315 */ 316 static int 317 parse_url(const char *url, const char *desc, url_t *type, 318 char **user, char **pass, char **host, char **port, 319 in_port_t *portnum, char **path) 320 { 321 const char *origurl; 322 char *cp, *ep, *thost, *tport; 323 size_t len; 324 325 if (url == NULL || desc == NULL || type == NULL || user == NULL 326 || pass == NULL || host == NULL || port == NULL || portnum == NULL 327 || path == NULL) 328 errx(1, "parse_url: invoked with NULL argument!"); 329 330 origurl = url; 331 *type = UNKNOWN_URL_T; 332 *user = *pass = *host = *port = *path = NULL; 333 *portnum = 0; 334 tport = NULL; 335 336 if (STRNEQUAL(url, HTTP_URL)) { 337 url += sizeof(HTTP_URL) - 1; 338 *type = HTTP_URL_T; 339 *portnum = HTTP_PORT; 340 tport = httpport; 341 } else if (STRNEQUAL(url, FTP_URL)) { 342 url += sizeof(FTP_URL) - 1; 343 *type = FTP_URL_T; 344 *portnum = FTP_PORT; 345 tport = ftpport; 346 } else if (STRNEQUAL(url, FILE_URL)) { 347 url += sizeof(FILE_URL) - 1; 348 *type = FILE_URL_T; 349 } else { 350 warnx("Invalid %s `%s'", desc, url); 351 cleanup_parse_url: 352 FREEPTR(*user); 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 = xstrdup(url); 367 else { 368 len = ep - url; 369 thost = (char *)xmalloc(len + 1); 370 (void)strlcpy(thost, url, len + 1); 371 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 372 ep++; 373 *path = xstrdup(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 = xstrdup(cp + 1); 383 cp = strchr(*user, ':'); 384 if (cp != NULL) { 385 *cp = '\0'; 386 *pass = xstrdup(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 = xstrdup(tport); 442 if (*path == NULL) 443 *path = xstrdup("/"); 444 445 if (debug) 446 fprintf(ttyout, 447 "parse_url: user `%s' pass `%s' host %s port %s(%d) " 448 "path `%s'\n", 449 *user ? *user : "<null>", *pass ? *pass : "<null>", 450 *host ? *host : "<null>", *port ? *port : "<null>", 451 *portnum ? *portnum : -1, *path ? *path : "<null>"); 452 453 return (0); 454 } 455 456 sigjmp_buf httpabort; 457 458 /* 459 * Retrieve URL, via a proxy if necessary, using HTTP. 460 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 461 * http_proxy as appropriate. 462 * Supports HTTP redirects. 463 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 464 * is still open (e.g, ftp xfer with trailing /) 465 */ 466 static int 467 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 468 { 469 struct addrinfo hints, *res, *res0 = NULL; 470 int error; 471 char hbuf[NI_MAXHOST]; 472 volatile sigfunc oldintr, oldintp; 473 volatile int s; 474 struct stat sb; 475 int ischunked, isproxy, rval, hcode; 476 size_t len; 477 static size_t bufsize; 478 static char *xferbuf; 479 const char *cp, *token; 480 char *ep, *buf, *savefile; 481 char *auth, *location, *message; 482 char *user, *pass, *host, *port, *path, *decodedpath; 483 char *puser, *ppass, *useragent; 484 off_t hashbytes, rangestart, rangeend, entitylen; 485 int (*closefunc)(FILE *); 486 FILE *fin, *fout; 487 time_t mtime; 488 url_t urltype; 489 in_port_t portnum; 490 491 oldintr = oldintp = NULL; 492 closefunc = NULL; 493 fin = fout = NULL; 494 s = -1; 495 buf = savefile = NULL; 496 auth = location = message = NULL; 497 ischunked = isproxy = hcode = 0; 498 rval = 1; 499 user = pass = host = path = decodedpath = puser = ppass = NULL; 500 501 #ifdef __GNUC__ /* shut up gcc warnings */ 502 (void)&closefunc; 503 (void)&fin; 504 (void)&fout; 505 (void)&buf; 506 (void)&savefile; 507 (void)&rval; 508 (void)&isproxy; 509 (void)&hcode; 510 (void)&ischunked; 511 (void)&message; 512 (void)&location; 513 (void)&auth; 514 (void)&decodedpath; 515 #endif 516 517 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 518 &portnum, &path) == -1) 519 goto cleanup_fetch_url; 520 521 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 522 && strcasecmp(host, "localhost") != 0) { 523 warnx("No support for non local file URL `%s'", url); 524 goto cleanup_fetch_url; 525 } 526 527 if (EMPTYSTRING(path)) { 528 if (urltype == FTP_URL_T) { 529 rval = fetch_ftp(url); 530 goto cleanup_fetch_url; 531 } 532 if (urltype != HTTP_URL_T || outfile == NULL) { 533 warnx("Invalid URL (no file after host) `%s'", url); 534 goto cleanup_fetch_url; 535 } 536 } 537 538 decodedpath = xstrdup(path); 539 url_decode(decodedpath); 540 541 if (outfile) 542 savefile = xstrdup(outfile); 543 else { 544 cp = strrchr(decodedpath, '/'); /* find savefile */ 545 if (cp != NULL) 546 savefile = xstrdup(cp + 1); 547 else 548 savefile = xstrdup(decodedpath); 549 } 550 if (EMPTYSTRING(savefile)) { 551 if (urltype == FTP_URL_T) { 552 rval = fetch_ftp(url); 553 goto cleanup_fetch_url; 554 } 555 warnx("no file after directory (you must specify an " 556 "output file) `%s'", url); 557 goto cleanup_fetch_url; 558 } else { 559 if (debug) 560 fprintf(ttyout, "savefile `%s'\n", savefile); 561 } 562 563 restart_point = 0; 564 filesize = -1; 565 rangestart = rangeend = entitylen = -1; 566 mtime = -1; 567 if (restartautofetch) { 568 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 569 stat(savefile, &sb) == 0) 570 restart_point = sb.st_size; 571 } 572 if (urltype == FILE_URL_T) { /* file:// URLs */ 573 direction = "copied"; 574 fin = fopen(decodedpath, "r"); 575 if (fin == NULL) { 576 warn("Cannot open file `%s'", decodedpath); 577 goto cleanup_fetch_url; 578 } 579 if (fstat(fileno(fin), &sb) == 0) { 580 mtime = sb.st_mtime; 581 filesize = sb.st_size; 582 } 583 if (restart_point) { 584 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 585 warn("Can't lseek to restart `%s'", 586 decodedpath); 587 goto cleanup_fetch_url; 588 } 589 } 590 if (verbose) { 591 fprintf(ttyout, "Copying %s", decodedpath); 592 if (restart_point) 593 fprintf(ttyout, " (restarting at " LLF ")", 594 (LLT)restart_point); 595 fputs("\n", ttyout); 596 } 597 } else { /* ftp:// or http:// URLs */ 598 char *leading; 599 int hasleading; 600 601 if (proxyenv == NULL) { 602 if (urltype == HTTP_URL_T) 603 proxyenv = getoptionvalue("http_proxy"); 604 else if (urltype == FTP_URL_T) 605 proxyenv = getoptionvalue("ftp_proxy"); 606 } 607 direction = "retrieved"; 608 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 609 url_t purltype; 610 char *phost, *ppath; 611 char *pport, *no_proxy; 612 613 isproxy = 1; 614 615 /* check URL against list of no_proxied sites */ 616 no_proxy = getoptionvalue("no_proxy"); 617 if (! EMPTYSTRING(no_proxy)) { 618 char *np, *np_copy; 619 long np_port; 620 size_t hlen, plen; 621 622 np_copy = xstrdup(no_proxy); 623 hlen = strlen(host); 624 while ((cp = strsep(&np_copy, " ,")) != NULL) { 625 if (*cp == '\0') 626 continue; 627 if ((np = strrchr(cp, ':')) != NULL) { 628 *np = '\0'; 629 np_port = 630 strtol(np + 1, &ep, 10); 631 if (*ep != '\0') 632 continue; 633 if (np_port != portnum) 634 continue; 635 } 636 plen = strlen(cp); 637 if (hlen < plen) 638 continue; 639 if (strncasecmp(host + hlen - plen, 640 cp, plen) == 0) { 641 isproxy = 0; 642 break; 643 } 644 } 645 FREEPTR(np_copy); 646 if (isproxy == 0 && urltype == FTP_URL_T) { 647 rval = fetch_ftp(url); 648 goto cleanup_fetch_url; 649 } 650 } 651 652 if (isproxy) { 653 if (parse_url(proxyenv, "proxy URL", &purltype, 654 &puser, &ppass, &phost, &pport, &portnum, 655 &ppath) == -1) 656 goto cleanup_fetch_url; 657 658 if ((purltype != HTTP_URL_T 659 && purltype != FTP_URL_T) || 660 EMPTYSTRING(phost) || 661 (! EMPTYSTRING(ppath) 662 && strcmp(ppath, "/") != 0)) { 663 warnx("Malformed proxy URL `%s'", 664 proxyenv); 665 FREEPTR(phost); 666 FREEPTR(pport); 667 FREEPTR(ppath); 668 goto cleanup_fetch_url; 669 } 670 if (isipv6addr(host) && 671 strchr(host, '%') != NULL) { 672 warnx( 673 "Scoped address notation `%s' disallowed via web proxy", 674 host); 675 FREEPTR(phost); 676 FREEPTR(pport); 677 FREEPTR(ppath); 678 goto cleanup_fetch_url; 679 } 680 681 FREEPTR(host); 682 host = phost; 683 FREEPTR(port); 684 port = pport; 685 FREEPTR(path); 686 path = xstrdup(url); 687 FREEPTR(ppath); 688 } 689 } /* ! EMPTYSTRING(proxyenv) */ 690 691 memset(&hints, 0, sizeof(hints)); 692 hints.ai_flags = 0; 693 hints.ai_family = family; 694 hints.ai_socktype = SOCK_STREAM; 695 hints.ai_protocol = 0; 696 error = getaddrinfo(host, NULL, &hints, &res0); 697 if (error) { 698 warnx("%s", gai_strerror(error)); 699 goto cleanup_fetch_url; 700 } 701 if (res0->ai_canonname) 702 host = res0->ai_canonname; 703 704 s = -1; 705 for (res = res0; res; res = res->ai_next) { 706 /* 707 * see comment in hookup() 708 */ 709 ai_unmapped(res); 710 if (getnameinfo(res->ai_addr, res->ai_addrlen, 711 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 712 strlcpy(hbuf, "invalid", sizeof(hbuf)); 713 714 if (verbose && res != res0) 715 fprintf(ttyout, "Trying %s...\n", hbuf); 716 717 ((struct sockaddr_in *)res->ai_addr)->sin_port = 718 htons(portnum); 719 s = socket(res->ai_family, SOCK_STREAM, 720 res->ai_protocol); 721 if (s < 0) { 722 warn("Can't create socket"); 723 continue; 724 } 725 726 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 727 warn("Connect to address `%s'", hbuf); 728 close(s); 729 s = -1; 730 continue; 731 } 732 733 /* success */ 734 break; 735 } 736 737 if (s < 0) { 738 warn("Can't connect to %s", host); 739 goto cleanup_fetch_url; 740 } 741 742 fin = fdopen(s, "r+"); 743 /* 744 * Construct and send the request. 745 */ 746 if (verbose) 747 fprintf(ttyout, "Requesting %s\n", url); 748 leading = " ("; 749 hasleading = 0; 750 if (isproxy) { 751 if (verbose) { 752 fprintf(ttyout, "%svia %s:%s", leading, 753 host, port); 754 leading = ", "; 755 hasleading++; 756 } 757 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 758 if (flushcache) 759 fprintf(fin, "Pragma: no-cache\r\n"); 760 } else { 761 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 762 if (strchr(host, ':')) { 763 char *h, *p; 764 765 /* 766 * strip off IPv6 scope identifier, since it is 767 * local to the node 768 */ 769 h = xstrdup(host); 770 if (isipv6addr(h) && 771 (p = strchr(h, '%')) != NULL) { 772 *p = '\0'; 773 } 774 fprintf(fin, "Host: [%s]", h); 775 free(h); 776 } else 777 fprintf(fin, "Host: %s", host); 778 if (portnum != HTTP_PORT) 779 fprintf(fin, ":%u", portnum); 780 fprintf(fin, "\r\n"); 781 fprintf(fin, "Accept: */*\r\n"); 782 fprintf(fin, "Connection: close\r\n"); 783 if (restart_point) { 784 fputs(leading, ttyout); 785 fprintf(fin, "Range: bytes=" LLF "-\r\n", 786 (LLT)restart_point); 787 fprintf(ttyout, "restarting at " LLF, 788 (LLT)restart_point); 789 leading = ", "; 790 hasleading++; 791 } 792 if (flushcache) 793 fprintf(fin, "Cache-Control: no-cache\r\n"); 794 } 795 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 796 fprintf(fin, "User-Agent: %s\r\n", useragent); 797 } else { 798 fprintf(fin, "User-Agent: %s/%s\r\n", 799 FTP_PRODUCT, FTP_VERSION); 800 } 801 if (wwwauth) { 802 if (verbose) { 803 fprintf(ttyout, "%swith authorization", 804 leading); 805 leading = ", "; 806 hasleading++; 807 } 808 fprintf(fin, "Authorization: %s\r\n", wwwauth); 809 } 810 if (proxyauth) { 811 if (verbose) { 812 fprintf(ttyout, 813 "%swith proxy authorization", leading); 814 leading = ", "; 815 hasleading++; 816 } 817 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 818 } 819 if (verbose && hasleading) 820 fputs(")\n", ttyout); 821 fprintf(fin, "\r\n"); 822 if (fflush(fin) == EOF) { 823 warn("Writing HTTP request"); 824 goto cleanup_fetch_url; 825 } 826 827 /* Read the response */ 828 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 829 warn("Receiving HTTP reply"); 830 goto cleanup_fetch_url; 831 } 832 while (len > 0 && (ISLWS(buf[len-1]))) 833 buf[--len] = '\0'; 834 if (debug) 835 fprintf(ttyout, "received `%s'\n", buf); 836 837 /* Determine HTTP response code */ 838 cp = strchr(buf, ' '); 839 if (cp == NULL) 840 goto improper; 841 else 842 cp++; 843 hcode = strtol(cp, &ep, 10); 844 if (*ep != '\0' && !isspace((unsigned char)*ep)) 845 goto improper; 846 message = xstrdup(cp); 847 848 /* Read the rest of the header. */ 849 while (1) { 850 FREEPTR(buf); 851 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 852 == NULL) { 853 warn("Receiving HTTP reply"); 854 goto cleanup_fetch_url; 855 } 856 while (len > 0 && (ISLWS(buf[len-1]))) 857 buf[--len] = '\0'; 858 if (len == 0) 859 break; 860 if (debug) 861 fprintf(ttyout, "received `%s'\n", buf); 862 863 /* 864 * Look for some headers 865 */ 866 867 cp = buf; 868 869 if (match_token(&cp, "Content-Length:")) { 870 filesize = STRTOLL(cp, &ep, 10); 871 if (filesize < 0 || *ep != '\0') 872 goto improper; 873 if (debug) 874 fprintf(ttyout, 875 "parsed len as: " LLF "\n", 876 (LLT)filesize); 877 878 } else if (match_token(&cp, "Content-Range:")) { 879 if (! match_token(&cp, "bytes")) 880 goto improper; 881 882 if (*cp == '*') 883 cp++; 884 else { 885 rangestart = STRTOLL(cp, &ep, 10); 886 if (rangestart < 0 || *ep != '-') 887 goto improper; 888 cp = ep + 1; 889 rangeend = STRTOLL(cp, &ep, 10); 890 if (rangeend < 0 || rangeend < rangestart) 891 goto improper; 892 cp = ep; 893 } 894 if (*cp != '/') 895 goto improper; 896 cp++; 897 if (*cp == '*') 898 cp++; 899 else { 900 entitylen = STRTOLL(cp, &ep, 10); 901 if (entitylen < 0) 902 goto improper; 903 cp = ep; 904 } 905 if (*cp != '\0') 906 goto improper; 907 908 if (debug) { 909 fprintf(ttyout, "parsed range as: "); 910 if (rangestart == -1) 911 fprintf(ttyout, "*"); 912 else 913 fprintf(ttyout, LLF "-" LLF, 914 (LLT)rangestart, 915 (LLT)rangeend); 916 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 917 } 918 if (! restart_point) { 919 warnx( 920 "Received unexpected Content-Range header"); 921 goto cleanup_fetch_url; 922 } 923 924 } else if (match_token(&cp, "Last-Modified:")) { 925 struct tm parsed; 926 char *t; 927 928 /* RFC 1123 */ 929 if ((t = strptime(cp, 930 "%a, %d %b %Y %H:%M:%S GMT", 931 &parsed)) 932 /* RFC 850 */ 933 || (t = strptime(cp, 934 "%a, %d-%b-%y %H:%M:%S GMT", 935 &parsed)) 936 /* asctime */ 937 || (t = strptime(cp, 938 "%a, %b %d %H:%M:%S %Y", 939 &parsed))) { 940 parsed.tm_isdst = -1; 941 if (*t == '\0') 942 mtime = timegm(&parsed); 943 if (debug && mtime != -1) { 944 fprintf(ttyout, 945 "parsed date as: %s", 946 ctime(&mtime)); 947 } 948 } 949 950 } else if (match_token(&cp, "Location:")) { 951 location = xstrdup(cp); 952 if (debug) 953 fprintf(ttyout, 954 "parsed location as `%s'\n", cp); 955 956 } else if (match_token(&cp, "Transfer-Encoding:")) { 957 if (match_token(&cp, "binary")) { 958 warnx( 959 "Bogus transfer encoding - `binary' (fetching anyway)"); 960 continue; 961 } 962 if (! (token = match_token(&cp, "chunked"))) { 963 warnx( 964 "Unsupported transfer encoding - `%s'", 965 token); 966 goto cleanup_fetch_url; 967 } 968 ischunked++; 969 if (debug) 970 fprintf(ttyout, 971 "using chunked encoding\n"); 972 973 } else if (match_token(&cp, "Proxy-Authenticate:") 974 || match_token(&cp, "WWW-Authenticate:")) { 975 if (! (token = match_token(&cp, "Basic"))) { 976 if (debug) 977 fprintf(ttyout, 978 "skipping unknown auth scheme `%s'\n", 979 token); 980 continue; 981 } 982 FREEPTR(auth); 983 auth = xstrdup(token); 984 if (debug) 985 fprintf(ttyout, 986 "parsed auth as `%s'\n", cp); 987 } 988 989 } 990 /* finished parsing header */ 991 FREEPTR(buf); 992 993 switch (hcode) { 994 case 200: 995 break; 996 case 206: 997 if (! restart_point) { 998 warnx("Not expecting partial content header"); 999 goto cleanup_fetch_url; 1000 } 1001 break; 1002 case 300: 1003 case 301: 1004 case 302: 1005 case 303: 1006 case 305: 1007 if (EMPTYSTRING(location)) { 1008 warnx( 1009 "No redirection Location provided by server"); 1010 goto cleanup_fetch_url; 1011 } 1012 if (redirect_loop++ > 5) { 1013 warnx("Too many redirections requested"); 1014 goto cleanup_fetch_url; 1015 } 1016 if (hcode == 305) { 1017 if (verbose) 1018 fprintf(ttyout, "Redirected via %s\n", 1019 location); 1020 rval = fetch_url(url, location, 1021 proxyauth, wwwauth); 1022 } else { 1023 if (verbose) 1024 fprintf(ttyout, "Redirected to %s\n", 1025 location); 1026 rval = go_fetch(location); 1027 } 1028 goto cleanup_fetch_url; 1029 #ifndef NO_AUTH 1030 case 401: 1031 case 407: 1032 { 1033 char **authp; 1034 char *auser, *apass; 1035 1036 if (hcode == 401) { 1037 authp = &wwwauth; 1038 auser = user; 1039 apass = pass; 1040 } else { 1041 authp = &proxyauth; 1042 auser = puser; 1043 apass = ppass; 1044 } 1045 if (verbose || *authp == NULL || 1046 auser == NULL || apass == NULL) 1047 fprintf(ttyout, "%s\n", message); 1048 if (EMPTYSTRING(auth)) { 1049 warnx( 1050 "No authentication challenge provided by server"); 1051 goto cleanup_fetch_url; 1052 } 1053 if (*authp != NULL) { 1054 char reply[10]; 1055 1056 fprintf(ttyout, 1057 "Authorization failed. Retry (y/n)? "); 1058 if (fgets(reply, sizeof(reply), stdin) 1059 == NULL) { 1060 clearerr(stdin); 1061 goto cleanup_fetch_url; 1062 } 1063 if (tolower((unsigned char)reply[0]) != 'y') 1064 goto cleanup_fetch_url; 1065 auser = NULL; 1066 apass = NULL; 1067 } 1068 if (auth_url(auth, authp, auser, apass) == 0) { 1069 rval = fetch_url(url, proxyenv, 1070 proxyauth, wwwauth); 1071 memset(*authp, 0, strlen(*authp)); 1072 FREEPTR(*authp); 1073 } 1074 goto cleanup_fetch_url; 1075 } 1076 #endif 1077 default: 1078 if (message) 1079 warnx("Error retrieving file - `%s'", message); 1080 else 1081 warnx("Unknown error retrieving file"); 1082 goto cleanup_fetch_url; 1083 } 1084 } /* end of ftp:// or http:// specific setup */ 1085 1086 /* Open the output file. */ 1087 if (strcmp(savefile, "-") == 0) { 1088 fout = stdout; 1089 } else if (*savefile == '|') { 1090 oldintp = xsignal(SIGPIPE, SIG_IGN); 1091 fout = popen(savefile + 1, "w"); 1092 if (fout == NULL) { 1093 warn("Can't run `%s'", savefile + 1); 1094 goto cleanup_fetch_url; 1095 } 1096 closefunc = pclose; 1097 } else { 1098 if ((rangeend != -1 && rangeend <= restart_point) || 1099 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1100 /* already done */ 1101 if (verbose) 1102 fprintf(ttyout, "already done\n"); 1103 rval = 0; 1104 goto cleanup_fetch_url; 1105 } 1106 if (restart_point && rangestart != -1) { 1107 if (entitylen != -1) 1108 filesize = entitylen; 1109 if (rangestart != restart_point) { 1110 warnx( 1111 "Size of `%s' differs from save file `%s'", 1112 url, savefile); 1113 goto cleanup_fetch_url; 1114 } 1115 fout = fopen(savefile, "a"); 1116 } else 1117 fout = fopen(savefile, "w"); 1118 if (fout == NULL) { 1119 warn("Can't open `%s'", savefile); 1120 goto cleanup_fetch_url; 1121 } 1122 closefunc = fclose; 1123 } 1124 1125 /* Trap signals */ 1126 if (sigsetjmp(httpabort, 1)) 1127 goto cleanup_fetch_url; 1128 (void)xsignal(SIGQUIT, psummary); 1129 oldintr = xsignal(SIGINT, aborthttp); 1130 1131 if (rcvbuf_size > bufsize) { 1132 if (xferbuf) 1133 (void)free(xferbuf); 1134 bufsize = rcvbuf_size; 1135 xferbuf = xmalloc(bufsize); 1136 } 1137 1138 bytes = 0; 1139 hashbytes = mark; 1140 progressmeter(-1); 1141 1142 /* Finally, suck down the file. */ 1143 do { 1144 long chunksize; 1145 1146 chunksize = 0; 1147 /* read chunksize */ 1148 if (ischunked) { 1149 if (fgets(xferbuf, bufsize, fin) == NULL) { 1150 warnx("Unexpected EOF reading chunksize"); 1151 goto cleanup_fetch_url; 1152 } 1153 chunksize = strtol(xferbuf, &ep, 16); 1154 1155 /* 1156 * XXX: Work around bug in Apache 1.3.9 and 1157 * 1.3.11, which incorrectly put trailing 1158 * space after the chunksize. 1159 */ 1160 while (*ep == ' ') 1161 ep++; 1162 1163 if (strcmp(ep, "\r\n") != 0) { 1164 warnx("Unexpected data following chunksize"); 1165 goto cleanup_fetch_url; 1166 } 1167 if (debug) 1168 fprintf(ttyout, "got chunksize of " LLF "\n", 1169 (LLT)chunksize); 1170 if (chunksize == 0) 1171 break; 1172 } 1173 /* transfer file or chunk */ 1174 while (1) { 1175 struct timeval then, now, td; 1176 off_t bufrem; 1177 1178 if (rate_get) 1179 (void)gettimeofday(&then, NULL); 1180 bufrem = rate_get ? rate_get : bufsize; 1181 if (ischunked) 1182 bufrem = MIN(chunksize, bufrem); 1183 while (bufrem > 0) { 1184 len = fread(xferbuf, sizeof(char), 1185 MIN(bufsize, bufrem), fin); 1186 if (len <= 0) 1187 goto chunkdone; 1188 bytes += len; 1189 bufrem -= len; 1190 if (fwrite(xferbuf, sizeof(char), len, fout) 1191 != len) { 1192 warn("Writing `%s'", savefile); 1193 goto cleanup_fetch_url; 1194 } 1195 if (hash && !progress) { 1196 while (bytes >= hashbytes) { 1197 (void)putc('#', ttyout); 1198 hashbytes += mark; 1199 } 1200 (void)fflush(ttyout); 1201 } 1202 if (ischunked) { 1203 chunksize -= len; 1204 if (chunksize <= 0) 1205 break; 1206 } 1207 } 1208 if (rate_get) { 1209 while (1) { 1210 (void)gettimeofday(&now, NULL); 1211 timersub(&now, &then, &td); 1212 if (td.tv_sec > 0) 1213 break; 1214 usleep(1000000 - td.tv_usec); 1215 } 1216 } 1217 if (ischunked && chunksize <= 0) 1218 break; 1219 } 1220 /* read CRLF after chunk*/ 1221 chunkdone: 1222 if (ischunked) { 1223 if (fgets(xferbuf, bufsize, fin) == NULL) 1224 break; 1225 if (strcmp(xferbuf, "\r\n") != 0) { 1226 warnx("Unexpected data following chunk"); 1227 goto cleanup_fetch_url; 1228 } 1229 } 1230 } while (ischunked); 1231 if (hash && !progress && bytes > 0) { 1232 if (bytes < mark) 1233 (void)putc('#', ttyout); 1234 (void)putc('\n', ttyout); 1235 } 1236 if (ferror(fin)) { 1237 warn("Reading file"); 1238 goto cleanup_fetch_url; 1239 } 1240 progressmeter(1); 1241 (void)fflush(fout); 1242 if (closefunc == fclose && mtime != -1) { 1243 struct timeval tval[2]; 1244 1245 (void)gettimeofday(&tval[0], NULL); 1246 tval[1].tv_sec = mtime; 1247 tval[1].tv_usec = 0; 1248 (*closefunc)(fout); 1249 fout = NULL; 1250 1251 if (utimes(savefile, tval) == -1) { 1252 fprintf(ttyout, 1253 "Can't change modification time to %s", 1254 asctime(localtime(&mtime))); 1255 } 1256 } 1257 if (bytes > 0) 1258 ptransfer(0); 1259 bytes = 0; 1260 1261 rval = 0; 1262 goto cleanup_fetch_url; 1263 1264 improper: 1265 warnx("Improper response from `%s'", host); 1266 1267 cleanup_fetch_url: 1268 if (oldintr) 1269 (void)xsignal(SIGINT, oldintr); 1270 if (oldintp) 1271 (void)xsignal(SIGPIPE, oldintp); 1272 if (fin != NULL) 1273 fclose(fin); 1274 else if (s != -1) 1275 close(s); 1276 if (closefunc != NULL && fout != NULL) 1277 (*closefunc)(fout); 1278 if (res0) 1279 freeaddrinfo(res0); 1280 FREEPTR(savefile); 1281 FREEPTR(user); 1282 FREEPTR(pass); 1283 FREEPTR(host); 1284 FREEPTR(port); 1285 FREEPTR(path); 1286 FREEPTR(decodedpath); 1287 FREEPTR(puser); 1288 FREEPTR(ppass); 1289 FREEPTR(buf); 1290 FREEPTR(auth); 1291 FREEPTR(location); 1292 FREEPTR(message); 1293 return (rval); 1294 } 1295 1296 /* 1297 * Abort a HTTP retrieval 1298 */ 1299 void 1300 aborthttp(int notused) 1301 { 1302 char msgbuf[100]; 1303 size_t len; 1304 1305 sigint_raised = 1; 1306 alarmtimer(0); 1307 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1308 write(fileno(ttyout), msgbuf, len); 1309 siglongjmp(httpabort, 1); 1310 } 1311 1312 /* 1313 * Retrieve ftp URL or classic ftp argument using FTP. 1314 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1315 * is still open (e.g, ftp xfer with trailing /) 1316 */ 1317 static int 1318 fetch_ftp(const char *url) 1319 { 1320 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1321 char *host, *path, *dir, *file, *user, *pass; 1322 char *port; 1323 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1324 in_port_t portnum; 1325 url_t urltype; 1326 1327 host = path = dir = file = user = pass = NULL; 1328 port = NULL; 1329 rval = 1; 1330 type = TYPE_I; 1331 1332 if (STRNEQUAL(url, FTP_URL)) { 1333 if ((parse_url(url, "URL", &urltype, &user, &pass, 1334 &host, &port, &portnum, &path) == -1) || 1335 (user != NULL && *user == '\0') || 1336 EMPTYSTRING(host)) { 1337 warnx("Invalid URL `%s'", url); 1338 goto cleanup_fetch_ftp; 1339 } 1340 /* 1341 * Note: Don't url_decode(path) here. We need to keep the 1342 * distinction between "/" and "%2F" until later. 1343 */ 1344 1345 /* check for trailing ';type=[aid]' */ 1346 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1347 if (strcasecmp(cp, ";type=a") == 0) 1348 type = TYPE_A; 1349 else if (strcasecmp(cp, ";type=i") == 0) 1350 type = TYPE_I; 1351 else if (strcasecmp(cp, ";type=d") == 0) { 1352 warnx( 1353 "Directory listing via a URL is not supported"); 1354 goto cleanup_fetch_ftp; 1355 } else { 1356 warnx("Invalid suffix `%s' in URL `%s'", cp, 1357 url); 1358 goto cleanup_fetch_ftp; 1359 } 1360 *cp = 0; 1361 } 1362 } else { /* classic style `[user@]host:[file]' */ 1363 urltype = CLASSIC_URL_T; 1364 host = xstrdup(url); 1365 cp = strchr(host, '@'); 1366 if (cp != NULL) { 1367 *cp = '\0'; 1368 user = host; 1369 anonftp = 0; /* disable anonftp */ 1370 host = xstrdup(cp + 1); 1371 } 1372 cp = strchr(host, ':'); 1373 if (cp != NULL) { 1374 *cp = '\0'; 1375 path = xstrdup(cp + 1); 1376 } 1377 } 1378 if (EMPTYSTRING(host)) 1379 goto cleanup_fetch_ftp; 1380 1381 /* Extract the file and (if present) directory name. */ 1382 dir = path; 1383 if (! EMPTYSTRING(dir)) { 1384 /* 1385 * If we are dealing with classic `[user@]host:[path]' syntax, 1386 * then a path of the form `/file' (resulting from input of the 1387 * form `host:/file') means that we should do "CWD /" before 1388 * retrieving the file. So we set dir="/" and file="file". 1389 * 1390 * But if we are dealing with URLs like `ftp://host/path' then 1391 * a path of the form `/file' (resulting from a URL of the form 1392 * `ftp://host//file') means that we should do `CWD ' (with an 1393 * empty argument) before retrieving the file. So we set 1394 * dir="" and file="file". 1395 * 1396 * If the path does not contain / at all, we set dir=NULL. 1397 * (We get a path without any slashes if we are dealing with 1398 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1399 * 1400 * In all other cases, we set dir to a string that does not 1401 * include the final '/' that separates the dir part from the 1402 * file part of the path. (This will be the empty string if 1403 * and only if we are dealing with a path of the form `/file' 1404 * resulting from an URL of the form `ftp://host//file'.) 1405 */ 1406 cp = strrchr(dir, '/'); 1407 if (cp == dir && urltype == CLASSIC_URL_T) { 1408 file = cp + 1; 1409 dir = "/"; 1410 } else if (cp != NULL) { 1411 *cp++ = '\0'; 1412 file = cp; 1413 } else { 1414 file = dir; 1415 dir = NULL; 1416 } 1417 } else 1418 dir = NULL; 1419 if (urltype == FTP_URL_T && file != NULL) { 1420 url_decode(file); 1421 /* but still don't url_decode(dir) */ 1422 } 1423 if (debug) 1424 fprintf(ttyout, 1425 "fetch_ftp: user `%s' pass `%s' host %s port %s " 1426 "path `%s' dir `%s' file `%s'\n", 1427 user ? user : "<null>", pass ? pass : "<null>", 1428 host ? host : "<null>", port ? port : "<null>", 1429 path ? path : "<null>", 1430 dir ? dir : "<null>", file ? file : "<null>"); 1431 1432 dirhasglob = filehasglob = 0; 1433 if (doglob && urltype == CLASSIC_URL_T) { 1434 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1435 dirhasglob = 1; 1436 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1437 filehasglob = 1; 1438 } 1439 1440 /* Set up the connection */ 1441 if (connected) 1442 disconnect(0, NULL); 1443 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1444 xargv[1] = host; 1445 xargv[2] = NULL; 1446 xargc = 2; 1447 if (port) { 1448 xargv[2] = port; 1449 xargv[3] = NULL; 1450 xargc = 3; 1451 } 1452 oautologin = autologin; 1453 /* don't autologin in setpeer(), use ftp_login() below */ 1454 autologin = 0; 1455 setpeer(xargc, xargv); 1456 autologin = oautologin; 1457 if ((connected == 0) || 1458 (connected == 1 && !ftp_login(host, user, pass))) { 1459 warnx("Can't connect or login to host `%s'", host); 1460 goto cleanup_fetch_ftp; 1461 } 1462 1463 switch (type) { 1464 case TYPE_A: 1465 setascii(1, xargv); 1466 break; 1467 case TYPE_I: 1468 setbinary(1, xargv); 1469 break; 1470 default: 1471 errx(1, "fetch_ftp: unknown transfer type %d", type); 1472 } 1473 1474 /* 1475 * Change directories, if necessary. 1476 * 1477 * Note: don't use EMPTYSTRING(dir) below, because 1478 * dir=="" means something different from dir==NULL. 1479 */ 1480 if (dir != NULL && !dirhasglob) { 1481 char *nextpart; 1482 1483 /* 1484 * If we are dealing with a classic `[user@]host:[path]' 1485 * (urltype is CLASSIC_URL_T) then we have a raw directory 1486 * name (not encoded in any way) and we can change 1487 * directories in one step. 1488 * 1489 * If we are dealing with an `ftp://host/path' URL 1490 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1491 * send a separate CWD command for each unescaped "/" 1492 * in the path, and we have to interpret %hex escaping 1493 * *after* we find the slashes. It's possible to get 1494 * empty components here, (from multiple adjacent 1495 * slashes in the path) and RFC 1738 says that we should 1496 * still do `CWD ' (with a null argument) in such cases. 1497 * 1498 * Many ftp servers don't support `CWD ', so if there's an 1499 * error performing that command, bail out with a descriptive 1500 * message. 1501 * 1502 * Examples: 1503 * 1504 * host: dir="", urltype=CLASSIC_URL_T 1505 * logged in (to default directory) 1506 * host:file dir=NULL, urltype=CLASSIC_URL_T 1507 * "RETR file" 1508 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1509 * "CWD dir", logged in 1510 * ftp://host/ dir="", urltype=FTP_URL_T 1511 * logged in (to default directory) 1512 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1513 * "CWD dir", logged in 1514 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1515 * "RETR file" 1516 * ftp://host//file dir="", urltype=FTP_URL_T 1517 * "CWD ", "RETR file" 1518 * host:/file dir="/", urltype=CLASSIC_URL_T 1519 * "CWD /", "RETR file" 1520 * ftp://host///file dir="/", urltype=FTP_URL_T 1521 * "CWD ", "CWD ", "RETR file" 1522 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1523 * "CWD /", "RETR file" 1524 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1525 * "CWD foo", "RETR file" 1526 * ftp://host/foo/bar/file dir="foo/bar" 1527 * "CWD foo", "CWD bar", "RETR file" 1528 * ftp://host//foo/bar/file dir="/foo/bar" 1529 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1530 * ftp://host/foo//bar/file dir="foo//bar" 1531 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1532 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1533 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1534 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1535 * "CWD /foo", "CWD bar", "RETR file" 1536 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1537 * "CWD /foo/bar", "RETR file" 1538 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1539 * "RETR /foo/bar/file" 1540 * 1541 * Note that we don't need `dir' after this point. 1542 */ 1543 do { 1544 if (urltype == FTP_URL_T) { 1545 nextpart = strchr(dir, '/'); 1546 if (nextpart) { 1547 *nextpart = '\0'; 1548 nextpart++; 1549 } 1550 url_decode(dir); 1551 } else 1552 nextpart = NULL; 1553 if (debug) 1554 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1555 dir ? dir : "<null>", 1556 nextpart ? nextpart : "<null>"); 1557 if (urltype == FTP_URL_T || *dir != '\0') { 1558 xargv[0] = "cd"; 1559 xargv[1] = dir; 1560 xargv[2] = NULL; 1561 dirchange = 0; 1562 cd(2, xargv); 1563 if (! dirchange) { 1564 if (*dir == '\0' && code == 500) 1565 fprintf(stderr, 1566 "\n" 1567 "ftp: The `CWD ' command (without a directory), which is required by\n" 1568 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1569 " conflicts with the server's conformance to RFC 959.\n" 1570 " Try the same URL without the `//' in the URL pathname.\n" 1571 "\n"); 1572 goto cleanup_fetch_ftp; 1573 } 1574 } 1575 dir = nextpart; 1576 } while (dir != NULL); 1577 } 1578 1579 if (EMPTYSTRING(file)) { 1580 rval = -1; 1581 goto cleanup_fetch_ftp; 1582 } 1583 1584 if (dirhasglob) { 1585 (void)strlcpy(rempath, dir, sizeof(rempath)); 1586 (void)strlcat(rempath, "/", sizeof(rempath)); 1587 (void)strlcat(rempath, file, sizeof(rempath)); 1588 file = rempath; 1589 } 1590 1591 /* Fetch the file(s). */ 1592 xargc = 2; 1593 xargv[0] = "get"; 1594 xargv[1] = file; 1595 xargv[2] = NULL; 1596 if (dirhasglob || filehasglob) { 1597 int ointeractive; 1598 1599 ointeractive = interactive; 1600 interactive = 0; 1601 if (restartautofetch) 1602 xargv[0] = "mreget"; 1603 else 1604 xargv[0] = "mget"; 1605 mget(xargc, xargv); 1606 interactive = ointeractive; 1607 } else { 1608 if (outfile == NULL) { 1609 cp = strrchr(file, '/'); /* find savefile */ 1610 if (cp != NULL) 1611 outfile = cp + 1; 1612 else 1613 outfile = file; 1614 } 1615 xargv[2] = (char *)outfile; 1616 xargv[3] = NULL; 1617 xargc++; 1618 if (restartautofetch) 1619 reget(xargc, xargv); 1620 else 1621 get(xargc, xargv); 1622 } 1623 1624 if ((code / 100) == COMPLETE) 1625 rval = 0; 1626 1627 cleanup_fetch_ftp: 1628 FREEPTR(host); 1629 FREEPTR(path); 1630 FREEPTR(user); 1631 FREEPTR(pass); 1632 return (rval); 1633 } 1634 1635 /* 1636 * Retrieve the given file to outfile. 1637 * Supports arguments of the form: 1638 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1639 * call fetch_ftp() 1640 * "http://host/path" call fetch_url() to use HTTP 1641 * "file:///path" call fetch_url() to copy 1642 * "about:..." print a message 1643 * 1644 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1645 * is still open (e.g, ftp xfer with trailing /) 1646 */ 1647 static int 1648 go_fetch(const char *url) 1649 { 1650 char *proxy; 1651 1652 #ifndef NO_ABOUT 1653 /* 1654 * Check for about:* 1655 */ 1656 if (STRNEQUAL(url, ABOUT_URL)) { 1657 url += sizeof(ABOUT_URL) -1; 1658 if (strcasecmp(url, "ftp") == 0 || 1659 strcasecmp(url, "tnftp") == 0) { 1660 fputs( 1661 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) NetBSD.org>\n" 1662 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1663 } else if (strcasecmp(url, "lukem") == 0) { 1664 fputs( 1665 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1666 "Please email feedback to <lukem (at) NetBSD.org>.\n", ttyout); 1667 } else if (strcasecmp(url, "netbsd") == 0) { 1668 fputs( 1669 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1670 "For more information, see http://www.NetBSD.org/\n", ttyout); 1671 } else if (strcasecmp(url, "version") == 0) { 1672 fprintf(ttyout, "Version: %s %s%s\n", 1673 FTP_PRODUCT, FTP_VERSION, 1674 #ifdef INET6 1675 "" 1676 #else 1677 " (-IPv6)" 1678 #endif 1679 ); 1680 } else { 1681 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1682 } 1683 fputs("\n", ttyout); 1684 return (0); 1685 } 1686 #endif 1687 1688 /* 1689 * Check for file:// and http:// URLs. 1690 */ 1691 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL)) 1692 return (fetch_url(url, NULL, NULL, NULL)); 1693 1694 /* 1695 * Try FTP URL-style and host:file arguments next. 1696 * If ftpproxy is set with an FTP URL, use fetch_url() 1697 * Othewise, use fetch_ftp(). 1698 */ 1699 proxy = getoptionvalue("ftp_proxy"); 1700 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL)) 1701 return (fetch_url(url, NULL, NULL, NULL)); 1702 1703 return (fetch_ftp(url)); 1704 } 1705 1706 /* 1707 * Retrieve multiple files from the command line, 1708 * calling go_fetch() for each file. 1709 * 1710 * If an ftp path has a trailing "/", the path will be cd-ed into and 1711 * the connection remains open, and the function will return -1 1712 * (to indicate the connection is alive). 1713 * If an error occurs the return value will be the offset+1 in 1714 * argv[] of the file that caused a problem (i.e, argv[x] 1715 * returns x+1) 1716 * Otherwise, 0 is returned if all files retrieved successfully. 1717 */ 1718 int 1719 auto_fetch(int argc, char *argv[]) 1720 { 1721 volatile int argpos; 1722 int rval; 1723 1724 argpos = 0; 1725 1726 if (sigsetjmp(toplevel, 1)) { 1727 if (connected) 1728 disconnect(0, NULL); 1729 if (rval > 0) 1730 rval = argpos + 1; 1731 return (rval); 1732 } 1733 (void)xsignal(SIGINT, intr); 1734 (void)xsignal(SIGPIPE, lostpeer); 1735 1736 /* 1737 * Loop through as long as there's files to fetch. 1738 */ 1739 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1740 if (strchr(argv[argpos], ':') == NULL) 1741 break; 1742 redirect_loop = 0; 1743 if (!anonftp) 1744 anonftp = 2; /* Handle "automatic" transfers. */ 1745 rval = go_fetch(argv[argpos]); 1746 if (outfile != NULL && strcmp(outfile, "-") != 0 1747 && outfile[0] != '|') 1748 outfile = NULL; 1749 if (rval > 0) 1750 rval = argpos + 1; 1751 } 1752 1753 if (connected && rval != -1) 1754 disconnect(0, NULL); 1755 return (rval); 1756 } 1757 1758 1759 int 1760 auto_put(int argc, char **argv, const char *uploadserver) 1761 { 1762 char *uargv[4], *path, *pathsep; 1763 int uargc, rval; 1764 size_t len; 1765 1766 uargc = 0; 1767 uargv[uargc++] = "mput"; 1768 uargv[uargc++] = argv[0]; 1769 uargv[2] = uargv[3] = NULL; 1770 pathsep = NULL; 1771 rval = 1; 1772 1773 if (debug) 1774 fprintf(ttyout, "auto_put: target `%s'\n", uploadserver); 1775 1776 path = xstrdup(uploadserver); 1777 len = strlen(path); 1778 if (path[len - 1] != '/' && path[len - 1] != ':') { 1779 /* 1780 * make sure we always pass a directory to auto_fetch 1781 */ 1782 if (argc > 1) { /* more than one file to upload */ 1783 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1784 free(path); 1785 path = (char *)xmalloc(len); 1786 (void)strlcpy(path, uploadserver, len); 1787 (void)strlcat(path, "/", len); 1788 } else { /* single file to upload */ 1789 uargv[0] = "put"; 1790 pathsep = strrchr(path, '/'); 1791 if (pathsep == NULL) { 1792 pathsep = strrchr(path, ':'); 1793 if (pathsep == NULL) { 1794 warnx("Invalid URL `%s'", path); 1795 goto cleanup_auto_put; 1796 } 1797 pathsep++; 1798 uargv[2] = xstrdup(pathsep); 1799 pathsep[0] = '/'; 1800 } else 1801 uargv[2] = xstrdup(pathsep + 1); 1802 pathsep[1] = '\0'; 1803 uargc++; 1804 } 1805 } 1806 if (debug) 1807 fprintf(ttyout, "auto_put: URL `%s' argv[2] `%s'\n", 1808 path, uargv[2] ? uargv[2] : "<null>"); 1809 1810 /* connect and cwd */ 1811 rval = auto_fetch(1, &path); 1812 free(path); 1813 if(rval >= 0) 1814 goto cleanup_auto_put; 1815 1816 /* XXX : is this the best way? */ 1817 if (uargc == 3) { 1818 uargv[1] = argv[0]; 1819 put(uargc, uargv); 1820 goto cleanup_auto_put; 1821 } 1822 1823 for(; argv[0] != NULL; argv++) { 1824 uargv[1] = argv[0]; 1825 mput(uargc, uargv); 1826 } 1827 rval = 0; 1828 1829 cleanup_auto_put: 1830 FREEPTR(uargv[2]); 1831 return (rval); 1832 } 1833
Indexes created Tue Sep 23 14:10:03 GMT 2025