1 /* $NetBSD: fetch.c,v 1.182 2007/08/22 23:47:13 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2007 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 1.182 2007/08/22 23:47:13 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 preceded by LWS. 116 * token must be followed by LWS or NUL. (I.e, don't partial match). 117 */ 118 static const char * 119 match_token(const char **buf, const char *token) 120 { 121 const char *p, *orig; 122 size_t tlen; 123 124 tlen = strlen(token); 125 p = *buf; 126 SKIPLWS(p); 127 orig = p; 128 if (strncasecmp(p, token, tlen) != 0) 129 return NULL; 130 p += tlen; 131 if (*p != '\0' && !ISLWS(*p)) 132 return NULL; 133 SKIPLWS(p); 134 orig = *buf; 135 *buf = p; 136 return orig; 137 } 138 139 #ifndef NO_AUTH 140 /* 141 * Generate authorization response based on given authentication challenge. 142 * Returns -1 if an error occurred, otherwise 0. 143 * Sets response to a malloc(3)ed string; caller should free. 144 */ 145 static int 146 auth_url(const char *challenge, char **response, const char *guser, 147 const char *gpass) 148 { 149 const char *cp, *scheme, *errormsg; 150 char *ep, *clear, *realm; 151 char user[BUFSIZ], *pass; 152 int rval; 153 size_t len, clen, rlen; 154 155 *response = NULL; 156 clear = realm = NULL; 157 rval = -1; 158 cp = challenge; 159 scheme = "Basic"; /* only support Basic authentication */ 160 161 DPRINTF("auth_url: challenge `%s'\n", challenge); 162 163 if (! match_token(&cp, scheme)) { 164 warnx("Unsupported authentication challenge `%s'", 165 challenge); 166 goto cleanup_auth_url; 167 } 168 169 #define REALM "realm=\"" 170 if (STRNEQUAL(cp, REALM)) 171 cp += sizeof(REALM) - 1; 172 else { 173 warnx("Unsupported authentication challenge `%s'", 174 challenge); 175 goto cleanup_auth_url; 176 } 177 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 178 if ((ep = strchr(cp, '\"')) != NULL) { 179 size_t len = ep - cp; 180 181 realm = (char *)ftp_malloc(len + 1); 182 (void)strlcpy(realm, cp, len + 1); 183 } else { 184 warnx("Unsupported authentication challenge `%s'", 185 challenge); 186 goto cleanup_auth_url; 187 } 188 189 fprintf(ttyout, "Username for `%s': ", realm); 190 if (guser != NULL) { 191 (void)strlcpy(user, guser, sizeof(user)); 192 fprintf(ttyout, "%s\n", user); 193 } else { 194 (void)fflush(ttyout); 195 if (getline(stdin, user, sizeof(user), &errormsg) < 0) { 196 warnx("%s; can't authenticate", errormsg); 197 goto cleanup_auth_url; 198 } 199 } 200 if (gpass != NULL) 201 pass = (char *)gpass; 202 else { 203 pass = getpass("Password: "); 204 if (pass == NULL) { 205 warnx("Can't read password"); 206 goto cleanup_auth_url; 207 } 208 } 209 210 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 211 clear = (char *)ftp_malloc(clen); 212 (void)strlcpy(clear, user, clen); 213 (void)strlcat(clear, ":", clen); 214 (void)strlcat(clear, pass, clen); 215 if (gpass == NULL) 216 memset(pass, 0, strlen(pass)); 217 218 /* scheme + " " + enc + "\0" */ 219 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 220 *response = (char *)ftp_malloc(rlen); 221 (void)strlcpy(*response, scheme, rlen); 222 len = strlcat(*response, " ", rlen); 223 /* use `clen - 1' to not encode the trailing NUL */ 224 base64_encode((unsigned char *)clear, clen - 1, 225 (unsigned char *)*response + len); 226 memset(clear, 0, clen); 227 rval = 0; 228 229 cleanup_auth_url: 230 FREEPTR(clear); 231 FREEPTR(realm); 232 return (rval); 233 } 234 235 /* 236 * Encode len bytes starting at clear using base64 encoding into encoded, 237 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 238 */ 239 static void 240 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 241 { 242 static const unsigned char enc[] = 243 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 244 unsigned char *cp; 245 int i; 246 247 cp = encoded; 248 for (i = 0; i < len; i += 3) { 249 *(cp++) = enc[((clear[i + 0] >> 2))]; 250 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 251 | ((clear[i + 1] >> 4) & 0x0f)]; 252 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 253 | ((clear[i + 2] >> 6) & 0x03)]; 254 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 255 } 256 *cp = '\0'; 257 while (i-- > len) 258 *(--cp) = '='; 259 } 260 #endif 261 262 /* 263 * Decode %xx escapes in given string, `in-place'. 264 */ 265 static void 266 url_decode(char *url) 267 { 268 unsigned char *p, *q; 269 270 if (EMPTYSTRING(url)) 271 return; 272 p = q = (unsigned char *)url; 273 274 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 275 while (*p) { 276 if (p[0] == '%' 277 && p[1] && isxdigit((unsigned char)p[1]) 278 && p[2] && isxdigit((unsigned char)p[2])) { 279 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 280 p+=3; 281 } else 282 *q++ = *p++; 283 } 284 *q = '\0'; 285 } 286 287 288 /* 289 * Parse URL of form (per RFC3986): 290 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 291 * Returns -1 if a parse error occurred, otherwise 0. 292 * It's the caller's responsibility to url_decode() the returned 293 * user, pass and path. 294 * 295 * Sets type to url_t, each of the given char ** pointers to a 296 * malloc(3)ed strings of the relevant section, and port to 297 * the number given, or ftpport if ftp://, or httpport if http://. 298 * 299 * XXX: this is not totally RFC3986 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 * "http://host" "/" 310 * "http://host/" "/" 311 * "http://host/path" "/path" 312 * "file://host/dir/file" "dir/file" 313 * "ftp://host" "" 314 * "ftp://host/" "" 315 * "ftp://host//" "/" 316 * "ftp://host/dir/file" "dir/file" 317 * "ftp://host//dir/file" "/dir/file" 318 */ 319 static int 320 parse_url(const char *url, const char *desc, url_t *type, 321 char **user, char **pass, char **host, char **port, 322 in_port_t *portnum, char **path) 323 { 324 const char *origurl; 325 char *cp, *ep, *thost, *tport; 326 size_t len; 327 328 if (url == NULL || desc == NULL || type == NULL || user == NULL 329 || pass == NULL || host == NULL || port == NULL || portnum == NULL 330 || path == NULL) 331 errx(1, "parse_url: invoked with NULL argument!"); 332 333 origurl = url; 334 *type = UNKNOWN_URL_T; 335 *user = *pass = *host = *port = *path = NULL; 336 *portnum = 0; 337 tport = NULL; 338 339 if (STRNEQUAL(url, HTTP_URL)) { 340 url += sizeof(HTTP_URL) - 1; 341 *type = HTTP_URL_T; 342 *portnum = HTTP_PORT; 343 tport = httpport; 344 } else if (STRNEQUAL(url, FTP_URL)) { 345 url += sizeof(FTP_URL) - 1; 346 *type = FTP_URL_T; 347 *portnum = FTP_PORT; 348 tport = ftpport; 349 } else if (STRNEQUAL(url, FILE_URL)) { 350 url += sizeof(FILE_URL) - 1; 351 *type = FILE_URL_T; 352 } else { 353 warnx("Invalid %s `%s'", desc, url); 354 cleanup_parse_url: 355 FREEPTR(*user); 356 if (*pass != NULL) 357 memset(*pass, 0, strlen(*pass)); 358 FREEPTR(*pass); 359 FREEPTR(*host); 360 FREEPTR(*port); 361 FREEPTR(*path); 362 return (-1); 363 } 364 365 if (*url == '\0') 366 return (0); 367 368 /* find [user[:pass]@]host[:port] */ 369 ep = strchr(url, '/'); 370 if (ep == NULL) 371 thost = ftp_strdup(url); 372 else { 373 len = ep - url; 374 thost = (char *)ftp_malloc(len + 1); 375 (void)strlcpy(thost, url, len + 1); 376 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 377 ep++; 378 *path = ftp_strdup(ep); 379 } 380 381 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 382 if (cp != NULL) { 383 if (*type == FTP_URL_T) 384 anonftp = 0; /* disable anonftp */ 385 *user = thost; 386 *cp = '\0'; 387 thost = ftp_strdup(cp + 1); 388 cp = strchr(*user, ':'); 389 if (cp != NULL) { 390 *cp = '\0'; 391 *pass = ftp_strdup(cp + 1); 392 } 393 url_decode(*user); 394 if (*pass) 395 url_decode(*pass); 396 } 397 398 #ifdef INET6 399 /* 400 * Check if thost is an encoded IPv6 address, as per 401 * RFC3986: 402 * `[' ipv6-address ']' 403 */ 404 if (*thost == '[') { 405 cp = thost + 1; 406 if ((ep = strchr(cp, ']')) == NULL || 407 (ep[1] != '\0' && ep[1] != ':')) { 408 warnx("Invalid address `%s' in %s `%s'", 409 thost, desc, origurl); 410 goto cleanup_parse_url; 411 } 412 len = ep - cp; /* change `[xyz]' -> `xyz' */ 413 memmove(thost, thost + 1, len); 414 thost[len] = '\0'; 415 if (! isipv6addr(thost)) { 416 warnx("Invalid IPv6 address `%s' in %s `%s'", 417 thost, desc, origurl); 418 goto cleanup_parse_url; 419 } 420 cp = ep + 1; 421 if (*cp == ':') 422 cp++; 423 else 424 cp = NULL; 425 } else 426 #endif /* INET6 */ 427 if ((cp = strchr(thost, ':')) != NULL) 428 *cp++ = '\0'; 429 *host = thost; 430 431 /* look for [:port] */ 432 if (cp != NULL) { 433 long nport; 434 435 nport = parseport(cp, -1); 436 if (nport == -1) { 437 warnx("Unknown port `%s' in %s `%s'", 438 cp, desc, origurl); 439 goto cleanup_parse_url; 440 } 441 *portnum = nport; 442 tport = cp; 443 } 444 445 if (tport != NULL) 446 *port = ftp_strdup(tport); 447 if (*path == NULL) { 448 const char *emptypath = "/"; 449 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 450 emptypath++; 451 *path = ftp_strdup(emptypath); 452 } 453 454 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 455 "path `%s'\n", 456 *user ? *user : "<null>", *pass ? *pass : "<null>", 457 *host ? *host : "<null>", *port ? *port : "<null>", 458 *portnum ? *portnum : -1, *path ? *path : "<null>"); 459 460 return (0); 461 } 462 463 sigjmp_buf httpabort; 464 465 /* 466 * Retrieve URL, via a proxy if necessary, using HTTP. 467 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 468 * http_proxy as appropriate. 469 * Supports HTTP redirects. 470 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 471 * is still open (e.g, ftp xfer with trailing /) 472 */ 473 static int 474 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 475 { 476 struct addrinfo hints, *res, *res0 = NULL; 477 int error; 478 char hbuf[NI_MAXHOST]; 479 sigfunc volatile oldintr; 480 sigfunc volatile oldintp; 481 int volatile s; 482 struct stat sb; 483 int volatile ischunked; 484 int volatile isproxy; 485 int volatile rval; 486 int volatile hcode; 487 size_t len; 488 static size_t bufsize; 489 static char *xferbuf; 490 const char *cp, *token; 491 char *ep; 492 char buf[FTPBUFLEN]; 493 const char *errormsg; 494 char *volatile savefile; 495 char *volatile auth; 496 char *volatile location; 497 char *volatile message; 498 char *user, *pass, *host, *port, *path; 499 char *volatile decodedpath; 500 char *puser, *ppass, *useragent; 501 off_t hashbytes, rangestart, rangeend, entitylen; 502 int (*volatile closefunc)(FILE *); 503 FILE *volatile fin; 504 FILE *volatile fout; 505 time_t mtime; 506 url_t urltype; 507 in_port_t portnum; 508 509 oldintr = oldintp = NULL; 510 closefunc = NULL; 511 fin = fout = NULL; 512 s = -1; 513 savefile = NULL; 514 auth = location = message = NULL; 515 ischunked = isproxy = hcode = 0; 516 rval = 1; 517 user = pass = host = path = decodedpath = puser = ppass = NULL; 518 519 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 520 &portnum, &path) == -1) 521 goto cleanup_fetch_url; 522 523 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 524 && strcasecmp(host, "localhost") != 0) { 525 warnx("No support for non local file URL `%s'", url); 526 goto cleanup_fetch_url; 527 } 528 529 if (EMPTYSTRING(path)) { 530 if (urltype == FTP_URL_T) { 531 rval = fetch_ftp(url); 532 goto cleanup_fetch_url; 533 } 534 if (urltype != HTTP_URL_T || outfile == NULL) { 535 warnx("Invalid URL (no file after host) `%s'", url); 536 goto cleanup_fetch_url; 537 } 538 } 539 540 decodedpath = ftp_strdup(path); 541 url_decode(decodedpath); 542 543 if (outfile) 544 savefile = ftp_strdup(outfile); 545 else { 546 cp = strrchr(decodedpath, '/'); /* find savefile */ 547 if (cp != NULL) 548 savefile = ftp_strdup(cp + 1); 549 else 550 savefile = ftp_strdup(decodedpath); 551 } 552 if (EMPTYSTRING(savefile)) { 553 if (urltype == FTP_URL_T) { 554 rval = fetch_ftp(url); 555 goto cleanup_fetch_url; 556 } 557 warnx("No file after directory (you must specify an " 558 "output file) `%s'", url); 559 goto cleanup_fetch_url; 560 } else { 561 DPRINTF("savefile `%s'\n", savefile); 562 } 563 564 restart_point = 0; 565 filesize = -1; 566 rangestart = rangeend = entitylen = -1; 567 mtime = -1; 568 if (restartautofetch) { 569 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 570 stat(savefile, &sb) == 0) 571 restart_point = sb.st_size; 572 } 573 if (urltype == FILE_URL_T) { /* file:// URLs */ 574 direction = "copied"; 575 fin = fopen(decodedpath, "r"); 576 if (fin == NULL) { 577 warn("Can't open `%s'", decodedpath); 578 goto cleanup_fetch_url; 579 } 580 if (fstat(fileno(fin), &sb) == 0) { 581 mtime = sb.st_mtime; 582 filesize = sb.st_size; 583 } 584 if (restart_point) { 585 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 586 warn("Can't seek to restart `%s'", 587 decodedpath); 588 goto cleanup_fetch_url; 589 } 590 } 591 if (verbose) { 592 fprintf(ttyout, "Copying %s", decodedpath); 593 if (restart_point) 594 fprintf(ttyout, " (restarting at " LLF ")", 595 (LLT)restart_point); 596 fputs("\n", ttyout); 597 } 598 } else { /* ftp:// or http:// URLs */ 599 char *leading; 600 int hasleading; 601 602 if (proxyenv == NULL) { 603 if (urltype == HTTP_URL_T) 604 proxyenv = getoptionvalue("http_proxy"); 605 else if (urltype == FTP_URL_T) 606 proxyenv = getoptionvalue("ftp_proxy"); 607 } 608 direction = "retrieved"; 609 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 610 url_t purltype; 611 char *phost, *ppath; 612 char *pport, *no_proxy; 613 614 isproxy = 1; 615 616 /* check URL against list of no_proxied sites */ 617 no_proxy = getoptionvalue("no_proxy"); 618 if (! EMPTYSTRING(no_proxy)) { 619 char *np, *np_copy, *np_iter; 620 long np_port; 621 size_t hlen, plen; 622 623 np_iter = np_copy = ftp_strdup(no_proxy); 624 hlen = strlen(host); 625 while ((cp = strsep(&np_iter, " ,")) != NULL) { 626 if (*cp == '\0') 627 continue; 628 if ((np = strrchr(cp, ':')) != NULL) { 629 *np = '\0'; 630 np_port = 631 strtol(np + 1, &ep, 10); 632 if (*ep != '\0') 633 continue; 634 if (np_port != portnum) 635 continue; 636 } 637 plen = strlen(cp); 638 if (hlen < plen) 639 continue; 640 if (strncasecmp(host + hlen - plen, 641 cp, plen) == 0) { 642 isproxy = 0; 643 break; 644 } 645 } 646 FREEPTR(np_copy); 647 if (isproxy == 0 && urltype == FTP_URL_T) { 648 rval = fetch_ftp(url); 649 goto cleanup_fetch_url; 650 } 651 } 652 653 if (isproxy) { 654 if (restart_point) { 655 warnx("Can't restart via proxy URL `%s'", 656 proxyenv); 657 goto cleanup_fetch_url; 658 } 659 if (parse_url(proxyenv, "proxy URL", &purltype, 660 &puser, &ppass, &phost, &pport, &portnum, 661 &ppath) == -1) 662 goto cleanup_fetch_url; 663 664 if ((purltype != HTTP_URL_T 665 && purltype != FTP_URL_T) || 666 EMPTYSTRING(phost) || 667 (! EMPTYSTRING(ppath) 668 && strcmp(ppath, "/") != 0)) { 669 warnx("Malformed proxy URL `%s'", 670 proxyenv); 671 FREEPTR(phost); 672 FREEPTR(pport); 673 FREEPTR(ppath); 674 goto cleanup_fetch_url; 675 } 676 if (isipv6addr(host) && 677 strchr(host, '%') != NULL) { 678 warnx( 679 "Scoped address notation `%s' disallowed via web proxy", 680 host); 681 FREEPTR(phost); 682 FREEPTR(pport); 683 FREEPTR(ppath); 684 goto cleanup_fetch_url; 685 } 686 687 FREEPTR(host); 688 host = phost; 689 FREEPTR(port); 690 port = pport; 691 FREEPTR(path); 692 path = ftp_strdup(url); 693 FREEPTR(ppath); 694 } 695 } /* ! EMPTYSTRING(proxyenv) */ 696 697 memset(&hints, 0, sizeof(hints)); 698 hints.ai_flags = 0; 699 hints.ai_family = family; 700 hints.ai_socktype = SOCK_STREAM; 701 hints.ai_protocol = 0; 702 error = getaddrinfo(host, NULL, &hints, &res0); 703 if (error) { 704 warnx("Can't lookup `%s': %s", host, 705 (error == EAI_SYSTEM) ? strerror(errno) 706 : gai_strerror(error)); 707 goto cleanup_fetch_url; 708 } 709 if (res0->ai_canonname) 710 host = res0->ai_canonname; 711 712 s = -1; 713 for (res = res0; res; res = res->ai_next) { 714 ai_unmapped(res); 715 if (getnameinfo(res->ai_addr, res->ai_addrlen, 716 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 717 strlcpy(hbuf, "?", sizeof(hbuf)); 718 719 if (verbose && res0->ai_next) { 720 fprintf(ttyout, "Trying %s...\n", hbuf); 721 } 722 723 ((struct sockaddr_in *)res->ai_addr)->sin_port = 724 htons(portnum); 725 s = socket(res->ai_family, SOCK_STREAM, 726 res->ai_protocol); 727 if (s < 0) { 728 warn( 729 "Can't create socket for connection to `%s'", 730 hbuf); 731 continue; 732 } 733 734 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 735 close(s); 736 s = -1; 737 continue; 738 } 739 740 /* success */ 741 break; 742 } 743 744 if (s < 0) { 745 warnx("Can't connect to `%s'", host); 746 goto cleanup_fetch_url; 747 } 748 749 fin = fdopen(s, "r+"); 750 /* 751 * Construct and send the request. 752 */ 753 if (verbose) 754 fprintf(ttyout, "Requesting %s\n", url); 755 leading = " ("; 756 hasleading = 0; 757 if (isproxy) { 758 if (verbose) { 759 fprintf(ttyout, "%svia %s:%s", leading, 760 host, port); 761 leading = ", "; 762 hasleading++; 763 } 764 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 765 if (flushcache) 766 fprintf(fin, "Pragma: no-cache\r\n"); 767 } else { 768 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 769 if (strchr(host, ':')) { 770 char *h, *p; 771 772 /* 773 * strip off IPv6 scope identifier, since it is 774 * local to the node 775 */ 776 h = ftp_strdup(host); 777 if (isipv6addr(h) && 778 (p = strchr(h, '%')) != NULL) { 779 *p = '\0'; 780 } 781 fprintf(fin, "Host: [%s]", h); 782 free(h); 783 } else 784 fprintf(fin, "Host: %s", host); 785 if (portnum != HTTP_PORT) 786 fprintf(fin, ":%u", portnum); 787 fprintf(fin, "\r\n"); 788 fprintf(fin, "Accept: */*\r\n"); 789 fprintf(fin, "Connection: close\r\n"); 790 if (restart_point) { 791 fputs(leading, ttyout); 792 fprintf(fin, "Range: bytes=" LLF "-\r\n", 793 (LLT)restart_point); 794 fprintf(ttyout, "restarting at " LLF, 795 (LLT)restart_point); 796 leading = ", "; 797 hasleading++; 798 } 799 if (flushcache) 800 fprintf(fin, "Cache-Control: no-cache\r\n"); 801 } 802 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 803 fprintf(fin, "User-Agent: %s\r\n", useragent); 804 } else { 805 fprintf(fin, "User-Agent: %s/%s\r\n", 806 FTP_PRODUCT, FTP_VERSION); 807 } 808 if (wwwauth) { 809 if (verbose) { 810 fprintf(ttyout, "%swith authorization", 811 leading); 812 leading = ", "; 813 hasleading++; 814 } 815 fprintf(fin, "Authorization: %s\r\n", wwwauth); 816 } 817 if (proxyauth) { 818 if (verbose) { 819 fprintf(ttyout, 820 "%swith proxy authorization", leading); 821 leading = ", "; 822 hasleading++; 823 } 824 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 825 } 826 if (verbose && hasleading) 827 fputs(")\n", ttyout); 828 fprintf(fin, "\r\n"); 829 if (fflush(fin) == EOF) { 830 warn("Writing HTTP request"); 831 goto cleanup_fetch_url; 832 } 833 834 /* Read the response */ 835 len = getline(fin, buf, sizeof(buf), &errormsg); 836 if (len < 0) { 837 if (*errormsg == '\n') 838 errormsg++; 839 warnx("Receiving HTTP reply: %s", errormsg); 840 goto cleanup_fetch_url; 841 } 842 while (len > 0 && (ISLWS(buf[len-1]))) 843 buf[--len] = '\0'; 844 DPRINTF("received `%s'\n", buf); 845 846 /* Determine HTTP response code */ 847 cp = strchr(buf, ' '); 848 if (cp == NULL) 849 goto improper; 850 else 851 cp++; 852 hcode = strtol(cp, &ep, 10); 853 if (*ep != '\0' && !isspace((unsigned char)*ep)) 854 goto improper; 855 message = ftp_strdup(cp); 856 857 /* Read the rest of the header. */ 858 while (1) { 859 len = getline(fin, buf, sizeof(buf), &errormsg); 860 if (len < 0) { 861 if (*errormsg == '\n') 862 errormsg++; 863 warnx("Receiving HTTP reply: %s", errormsg); 864 goto cleanup_fetch_url; 865 } 866 while (len > 0 && (ISLWS(buf[len-1]))) 867 buf[--len] = '\0'; 868 if (len == 0) 869 break; 870 DPRINTF("received `%s'\n", buf); 871 872 /* 873 * Look for some headers 874 */ 875 876 cp = buf; 877 878 if (match_token(&cp, "Content-Length:")) { 879 filesize = STRTOLL(cp, &ep, 10); 880 if (filesize < 0 || *ep != '\0') 881 goto improper; 882 DPRINTF("parsed len as: " LLF "\n", 883 (LLT)filesize); 884 885 } else if (match_token(&cp, "Content-Range:")) { 886 if (! match_token(&cp, "bytes")) 887 goto improper; 888 889 if (*cp == '*') 890 cp++; 891 else { 892 rangestart = STRTOLL(cp, &ep, 10); 893 if (rangestart < 0 || *ep != '-') 894 goto improper; 895 cp = ep + 1; 896 rangeend = STRTOLL(cp, &ep, 10); 897 if (rangeend < 0 || rangeend < rangestart) 898 goto improper; 899 cp = ep; 900 } 901 if (*cp != '/') 902 goto improper; 903 cp++; 904 if (*cp == '*') 905 cp++; 906 else { 907 entitylen = STRTOLL(cp, &ep, 10); 908 if (entitylen < 0) 909 goto improper; 910 cp = ep; 911 } 912 if (*cp != '\0') 913 goto improper; 914 915 #ifndef NO_DEBUG 916 if (ftp_debug) { 917 fprintf(ttyout, "parsed range as: "); 918 if (rangestart == -1) 919 fprintf(ttyout, "*"); 920 else 921 fprintf(ttyout, LLF "-" LLF, 922 (LLT)rangestart, 923 (LLT)rangeend); 924 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 925 } 926 #endif 927 if (! restart_point) { 928 warnx( 929 "Received unexpected Content-Range header"); 930 goto cleanup_fetch_url; 931 } 932 933 } else if (match_token(&cp, "Last-Modified:")) { 934 struct tm parsed; 935 char *t; 936 937 memset(&parsed, 0, sizeof(parsed)); 938 /* RFC1123 */ 939 if ((t = strptime(cp, 940 "%a, %d %b %Y %H:%M:%S GMT", 941 &parsed)) 942 /* RFC0850 */ 943 || (t = strptime(cp, 944 "%a, %d-%b-%y %H:%M:%S GMT", 945 &parsed)) 946 /* asctime */ 947 || (t = strptime(cp, 948 "%a, %b %d %H:%M:%S %Y", 949 &parsed))) { 950 parsed.tm_isdst = -1; 951 if (*t == '\0') 952 mtime = timegm(&parsed); 953 #ifndef NO_DEBUG 954 if (ftp_debug && mtime != -1) { 955 fprintf(ttyout, 956 "parsed date as: %s", 957 rfc2822time(localtime(&mtime))); 958 } 959 #endif 960 } 961 962 } else if (match_token(&cp, "Location:")) { 963 location = ftp_strdup(cp); 964 DPRINTF("parsed location as `%s'\n", cp); 965 966 } else if (match_token(&cp, "Transfer-Encoding:")) { 967 if (match_token(&cp, "binary")) { 968 warnx( 969 "Bogus transfer encoding `binary' (fetching anyway)"); 970 continue; 971 } 972 if (! (token = match_token(&cp, "chunked"))) { 973 warnx( 974 "Unsupported transfer encoding `%s'", 975 token); 976 goto cleanup_fetch_url; 977 } 978 ischunked++; 979 DPRINTF("using chunked encoding\n"); 980 981 } else if (match_token(&cp, "Proxy-Authenticate:") 982 || match_token(&cp, "WWW-Authenticate:")) { 983 if (! (token = match_token(&cp, "Basic"))) { 984 DPRINTF( 985 "skipping unknown auth scheme `%s'\n", 986 token); 987 continue; 988 } 989 FREEPTR(auth); 990 auth = ftp_strdup(token); 991 DPRINTF("parsed auth as `%s'\n", cp); 992 } 993 994 } 995 /* finished parsing header */ 996 997 switch (hcode) { 998 case 200: 999 break; 1000 case 206: 1001 if (! restart_point) { 1002 warnx("Not expecting partial content header"); 1003 goto cleanup_fetch_url; 1004 } 1005 break; 1006 case 300: 1007 case 301: 1008 case 302: 1009 case 303: 1010 case 305: 1011 case 307: 1012 if (EMPTYSTRING(location)) { 1013 warnx( 1014 "No redirection Location provided by server"); 1015 goto cleanup_fetch_url; 1016 } 1017 if (redirect_loop++ > 5) { 1018 warnx("Too many redirections requested"); 1019 goto cleanup_fetch_url; 1020 } 1021 if (hcode == 305) { 1022 if (verbose) 1023 fprintf(ttyout, "Redirected via %s\n", 1024 location); 1025 rval = fetch_url(url, location, 1026 proxyauth, wwwauth); 1027 } else { 1028 if (verbose) 1029 fprintf(ttyout, "Redirected to %s\n", 1030 location); 1031 rval = go_fetch(location); 1032 } 1033 goto cleanup_fetch_url; 1034 #ifndef NO_AUTH 1035 case 401: 1036 case 407: 1037 { 1038 char **authp; 1039 char *auser, *apass; 1040 1041 if (hcode == 401) { 1042 authp = &wwwauth; 1043 auser = user; 1044 apass = pass; 1045 } else { 1046 authp = &proxyauth; 1047 auser = puser; 1048 apass = ppass; 1049 } 1050 if (verbose || *authp == NULL || 1051 auser == NULL || apass == NULL) 1052 fprintf(ttyout, "%s\n", message); 1053 if (EMPTYSTRING(auth)) { 1054 warnx( 1055 "No authentication challenge provided by server"); 1056 goto cleanup_fetch_url; 1057 } 1058 if (*authp != NULL) { 1059 char reply[10]; 1060 1061 fprintf(ttyout, 1062 "Authorization failed. Retry (y/n)? "); 1063 if (getline(stdin, reply, sizeof(reply), NULL) 1064 < 0) { 1065 goto cleanup_fetch_url; 1066 } 1067 if (tolower((unsigned char)reply[0]) != 'y') 1068 goto cleanup_fetch_url; 1069 auser = NULL; 1070 apass = NULL; 1071 } 1072 if (auth_url(auth, authp, auser, apass) == 0) { 1073 rval = fetch_url(url, proxyenv, 1074 proxyauth, wwwauth); 1075 memset(*authp, 0, strlen(*authp)); 1076 FREEPTR(*authp); 1077 } 1078 goto cleanup_fetch_url; 1079 } 1080 #endif 1081 default: 1082 if (message) 1083 warnx("Error retrieving file `%s'", message); 1084 else 1085 warnx("Unknown error retrieving file"); 1086 goto cleanup_fetch_url; 1087 } 1088 } /* end of ftp:// or http:// specific setup */ 1089 1090 /* Open the output file. */ 1091 if (strcmp(savefile, "-") == 0) { 1092 fout = stdout; 1093 } else if (*savefile == '|') { 1094 oldintp = xsignal(SIGPIPE, SIG_IGN); 1095 fout = popen(savefile + 1, "w"); 1096 if (fout == NULL) { 1097 warn("Can't execute `%s'", savefile + 1); 1098 goto cleanup_fetch_url; 1099 } 1100 closefunc = pclose; 1101 } else { 1102 if ((rangeend != -1 && rangeend <= restart_point) || 1103 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1104 /* already done */ 1105 if (verbose) 1106 fprintf(ttyout, "already done\n"); 1107 rval = 0; 1108 goto cleanup_fetch_url; 1109 } 1110 if (restart_point && rangestart != -1) { 1111 if (entitylen != -1) 1112 filesize = entitylen; 1113 if (rangestart != restart_point) { 1114 warnx( 1115 "Size of `%s' differs from save file `%s'", 1116 url, savefile); 1117 goto cleanup_fetch_url; 1118 } 1119 fout = fopen(savefile, "a"); 1120 } else 1121 fout = fopen(savefile, "w"); 1122 if (fout == NULL) { 1123 warn("Can't open `%s'", savefile); 1124 goto cleanup_fetch_url; 1125 } 1126 closefunc = fclose; 1127 } 1128 1129 /* Trap signals */ 1130 if (sigsetjmp(httpabort, 1)) 1131 goto cleanup_fetch_url; 1132 (void)xsignal(SIGQUIT, psummary); 1133 oldintr = xsignal(SIGINT, aborthttp); 1134 1135 if (rcvbuf_size > bufsize) { 1136 if (xferbuf) 1137 (void)free(xferbuf); 1138 bufsize = rcvbuf_size; 1139 xferbuf = ftp_malloc(bufsize); 1140 } 1141 1142 bytes = 0; 1143 hashbytes = mark; 1144 progressmeter(-1); 1145 1146 /* Finally, suck down the file. */ 1147 do { 1148 long chunksize; 1149 short lastchunk; 1150 1151 chunksize = 0; 1152 lastchunk = 0; 1153 /* read chunk-size */ 1154 if (ischunked) { 1155 if (fgets(xferbuf, bufsize, fin) == NULL) { 1156 warnx("Unexpected EOF reading chunk-size"); 1157 goto cleanup_fetch_url; 1158 } 1159 errno = 0; 1160 chunksize = strtol(xferbuf, &ep, 16); 1161 if (ep == xferbuf) { 1162 warnx("Invalid chunk-size"); 1163 goto cleanup_fetch_url; 1164 } 1165 if (errno == ERANGE || chunksize < 0) { 1166 errno = ERANGE; 1167 warn("Chunk-size `%.*s'", 1168 (int)(ep-xferbuf), xferbuf); 1169 goto cleanup_fetch_url; 1170 } 1171 1172 /* 1173 * XXX: Work around bug in Apache 1.3.9 and 1174 * 1.3.11, which incorrectly put trailing 1175 * space after the chunk-size. 1176 */ 1177 while (*ep == ' ') 1178 ep++; 1179 1180 /* skip [ chunk-ext ] */ 1181 if (*ep == ';') { 1182 while (*ep && *ep != '\r') 1183 ep++; 1184 } 1185 1186 if (strcmp(ep, "\r\n") != 0) { 1187 warnx("Unexpected data following chunk-size"); 1188 goto cleanup_fetch_url; 1189 } 1190 DPRINTF("got chunk-size of " LLF "\n", (LLT)chunksize); 1191 if (chunksize == 0) { 1192 lastchunk = 1; 1193 goto chunkdone; 1194 } 1195 } 1196 /* transfer file or chunk */ 1197 while (1) { 1198 struct timeval then, now, td; 1199 off_t bufrem; 1200 1201 if (rate_get) 1202 (void)gettimeofday(&then, NULL); 1203 bufrem = rate_get ? rate_get : bufsize; 1204 if (ischunked) 1205 bufrem = MIN(chunksize, bufrem); 1206 while (bufrem > 0) { 1207 len = fread(xferbuf, sizeof(char), 1208 MIN(bufsize, bufrem), fin); 1209 if (len <= 0) 1210 goto chunkdone; 1211 bytes += len; 1212 bufrem -= len; 1213 if (fwrite(xferbuf, sizeof(char), len, fout) 1214 != len) { 1215 warn("Writing `%s'", savefile); 1216 goto cleanup_fetch_url; 1217 } 1218 if (hash && !progress) { 1219 while (bytes >= hashbytes) { 1220 (void)putc('#', ttyout); 1221 hashbytes += mark; 1222 } 1223 (void)fflush(ttyout); 1224 } 1225 if (ischunked) { 1226 chunksize -= len; 1227 if (chunksize <= 0) 1228 break; 1229 } 1230 } 1231 if (rate_get) { 1232 while (1) { 1233 (void)gettimeofday(&now, NULL); 1234 timersub(&now, &then, &td); 1235 if (td.tv_sec > 0) 1236 break; 1237 usleep(1000000 - td.tv_usec); 1238 } 1239 } 1240 if (ischunked && chunksize <= 0) 1241 break; 1242 } 1243 /* read CRLF after chunk*/ 1244 chunkdone: 1245 if (ischunked) { 1246 if (fgets(xferbuf, bufsize, fin) == NULL) { 1247 warnx("Unexpected EOF reading chunk CRLF"); 1248 goto cleanup_fetch_url; 1249 } 1250 if (strcmp(xferbuf, "\r\n") != 0) { 1251 warnx("Unexpected data following chunk"); 1252 goto cleanup_fetch_url; 1253 } 1254 if (lastchunk) 1255 break; 1256 } 1257 } while (ischunked); 1258 1259 /* XXX: deal with optional trailer & CRLF here? */ 1260 1261 if (hash && !progress && bytes > 0) { 1262 if (bytes < mark) 1263 (void)putc('#', ttyout); 1264 (void)putc('\n', ttyout); 1265 } 1266 if (ferror(fin)) { 1267 warn("Reading file"); 1268 goto cleanup_fetch_url; 1269 } 1270 progressmeter(1); 1271 (void)fflush(fout); 1272 if (closefunc == fclose && mtime != -1) { 1273 struct timeval tval[2]; 1274 1275 (void)gettimeofday(&tval[0], NULL); 1276 tval[1].tv_sec = mtime; 1277 tval[1].tv_usec = 0; 1278 (*closefunc)(fout); 1279 fout = NULL; 1280 1281 if (utimes(savefile, tval) == -1) { 1282 fprintf(ttyout, 1283 "Can't change modification time to %s", 1284 rfc2822time(localtime(&mtime))); 1285 } 1286 } 1287 if (bytes > 0) 1288 ptransfer(0); 1289 bytes = 0; 1290 1291 rval = 0; 1292 goto cleanup_fetch_url; 1293 1294 improper: 1295 warnx("Improper response from `%s'", host); 1296 1297 cleanup_fetch_url: 1298 if (oldintr) 1299 (void)xsignal(SIGINT, oldintr); 1300 if (oldintp) 1301 (void)xsignal(SIGPIPE, oldintp); 1302 if (fin != NULL) 1303 fclose(fin); 1304 else if (s != -1) 1305 close(s); 1306 if (closefunc != NULL && fout != NULL) 1307 (*closefunc)(fout); 1308 if (res0) 1309 freeaddrinfo(res0); 1310 FREEPTR(savefile); 1311 FREEPTR(user); 1312 if (pass != NULL) 1313 memset(pass, 0, strlen(pass)); 1314 FREEPTR(pass); 1315 FREEPTR(host); 1316 FREEPTR(port); 1317 FREEPTR(path); 1318 FREEPTR(decodedpath); 1319 FREEPTR(puser); 1320 if (ppass != NULL) 1321 memset(ppass, 0, strlen(ppass)); 1322 FREEPTR(ppass); 1323 FREEPTR(auth); 1324 FREEPTR(location); 1325 FREEPTR(message); 1326 return (rval); 1327 } 1328 1329 /* 1330 * Abort a HTTP retrieval 1331 */ 1332 void 1333 aborthttp(int notused) 1334 { 1335 char msgbuf[100]; 1336 size_t len; 1337 1338 sigint_raised = 1; 1339 alarmtimer(0); 1340 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1341 write(fileno(ttyout), msgbuf, len); 1342 siglongjmp(httpabort, 1); 1343 } 1344 1345 /* 1346 * Retrieve ftp URL or classic ftp argument using FTP. 1347 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1348 * is still open (e.g, ftp xfer with trailing /) 1349 */ 1350 static int 1351 fetch_ftp(const char *url) 1352 { 1353 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1354 char *host, *path, *dir, *file, *user, *pass; 1355 char *port; 1356 int dirhasglob, filehasglob, rval, type, xargc; 1357 int oanonftp, oautologin; 1358 in_port_t portnum; 1359 url_t urltype; 1360 1361 host = path = dir = file = user = pass = NULL; 1362 port = NULL; 1363 rval = 1; 1364 type = TYPE_I; 1365 1366 if (STRNEQUAL(url, FTP_URL)) { 1367 if ((parse_url(url, "URL", &urltype, &user, &pass, 1368 &host, &port, &portnum, &path) == -1) || 1369 (user != NULL && *user == '\0') || 1370 EMPTYSTRING(host)) { 1371 warnx("Invalid URL `%s'", url); 1372 goto cleanup_fetch_ftp; 1373 } 1374 /* 1375 * Note: Don't url_decode(path) here. We need to keep the 1376 * distinction between "/" and "%2F" until later. 1377 */ 1378 1379 /* check for trailing ';type=[aid]' */ 1380 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1381 if (strcasecmp(cp, ";type=a") == 0) 1382 type = TYPE_A; 1383 else if (strcasecmp(cp, ";type=i") == 0) 1384 type = TYPE_I; 1385 else if (strcasecmp(cp, ";type=d") == 0) { 1386 warnx( 1387 "Directory listing via a URL is not supported"); 1388 goto cleanup_fetch_ftp; 1389 } else { 1390 warnx("Invalid suffix `%s' in URL `%s'", cp, 1391 url); 1392 goto cleanup_fetch_ftp; 1393 } 1394 *cp = 0; 1395 } 1396 } else { /* classic style `[user@]host:[file]' */ 1397 urltype = CLASSIC_URL_T; 1398 host = ftp_strdup(url); 1399 cp = strchr(host, '@'); 1400 if (cp != NULL) { 1401 *cp = '\0'; 1402 user = host; 1403 anonftp = 0; /* disable anonftp */ 1404 host = ftp_strdup(cp + 1); 1405 } 1406 cp = strchr(host, ':'); 1407 if (cp != NULL) { 1408 *cp = '\0'; 1409 path = ftp_strdup(cp + 1); 1410 } 1411 } 1412 if (EMPTYSTRING(host)) 1413 goto cleanup_fetch_ftp; 1414 1415 /* Extract the file and (if present) directory name. */ 1416 dir = path; 1417 if (! EMPTYSTRING(dir)) { 1418 /* 1419 * If we are dealing with classic `[user@]host:[path]' syntax, 1420 * then a path of the form `/file' (resulting from input of the 1421 * form `host:/file') means that we should do "CWD /" before 1422 * retrieving the file. So we set dir="/" and file="file". 1423 * 1424 * But if we are dealing with URLs like `ftp://host/path' then 1425 * a path of the form `/file' (resulting from a URL of the form 1426 * `ftp://host//file') means that we should do `CWD ' (with an 1427 * empty argument) before retrieving the file. So we set 1428 * dir="" and file="file". 1429 * 1430 * If the path does not contain / at all, we set dir=NULL. 1431 * (We get a path without any slashes if we are dealing with 1432 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1433 * 1434 * In all other cases, we set dir to a string that does not 1435 * include the final '/' that separates the dir part from the 1436 * file part of the path. (This will be the empty string if 1437 * and only if we are dealing with a path of the form `/file' 1438 * resulting from an URL of the form `ftp://host//file'.) 1439 */ 1440 cp = strrchr(dir, '/'); 1441 if (cp == dir && urltype == CLASSIC_URL_T) { 1442 file = cp + 1; 1443 dir = "/"; 1444 } else if (cp != NULL) { 1445 *cp++ = '\0'; 1446 file = cp; 1447 } else { 1448 file = dir; 1449 dir = NULL; 1450 } 1451 } else 1452 dir = NULL; 1453 if (urltype == FTP_URL_T && file != NULL) { 1454 url_decode(file); 1455 /* but still don't url_decode(dir) */ 1456 } 1457 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1458 "path `%s' dir `%s' file `%s'\n", 1459 user ? user : "<null>", pass ? pass : "<null>", 1460 host ? host : "<null>", port ? port : "<null>", 1461 path ? path : "<null>", 1462 dir ? dir : "<null>", file ? file : "<null>"); 1463 1464 dirhasglob = filehasglob = 0; 1465 if (doglob && urltype == CLASSIC_URL_T) { 1466 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1467 dirhasglob = 1; 1468 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1469 filehasglob = 1; 1470 } 1471 1472 /* Set up the connection */ 1473 oanonftp = anonftp; 1474 if (connected) 1475 disconnect(0, NULL); 1476 anonftp = oanonftp; 1477 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1478 xargv[1] = host; 1479 xargv[2] = NULL; 1480 xargc = 2; 1481 if (port) { 1482 xargv[2] = port; 1483 xargv[3] = NULL; 1484 xargc = 3; 1485 } 1486 oautologin = autologin; 1487 /* don't autologin in setpeer(), use ftp_login() below */ 1488 autologin = 0; 1489 setpeer(xargc, xargv); 1490 autologin = oautologin; 1491 if ((connected == 0) || 1492 (connected == 1 && !ftp_login(host, user, pass))) { 1493 warnx("Can't connect or login to host `%s'", host); 1494 goto cleanup_fetch_ftp; 1495 } 1496 1497 switch (type) { 1498 case TYPE_A: 1499 setascii(1, xargv); 1500 break; 1501 case TYPE_I: 1502 setbinary(1, xargv); 1503 break; 1504 default: 1505 errx(1, "fetch_ftp: unknown transfer type %d", type); 1506 } 1507 1508 /* 1509 * Change directories, if necessary. 1510 * 1511 * Note: don't use EMPTYSTRING(dir) below, because 1512 * dir=="" means something different from dir==NULL. 1513 */ 1514 if (dir != NULL && !dirhasglob) { 1515 char *nextpart; 1516 1517 /* 1518 * If we are dealing with a classic `[user@]host:[path]' 1519 * (urltype is CLASSIC_URL_T) then we have a raw directory 1520 * name (not encoded in any way) and we can change 1521 * directories in one step. 1522 * 1523 * If we are dealing with an `ftp://host/path' URL 1524 * (urltype is FTP_URL_T), then RFC3986 says we need to 1525 * send a separate CWD command for each unescaped "/" 1526 * in the path, and we have to interpret %hex escaping 1527 * *after* we find the slashes. It's possible to get 1528 * empty components here, (from multiple adjacent 1529 * slashes in the path) and RFC3986 says that we should 1530 * still do `CWD ' (with a null argument) in such cases. 1531 * 1532 * Many ftp servers don't support `CWD ', so if there's an 1533 * error performing that command, bail out with a descriptive 1534 * message. 1535 * 1536 * Examples: 1537 * 1538 * host: dir="", urltype=CLASSIC_URL_T 1539 * logged in (to default directory) 1540 * host:file dir=NULL, urltype=CLASSIC_URL_T 1541 * "RETR file" 1542 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1543 * "CWD dir", logged in 1544 * ftp://host/ dir="", urltype=FTP_URL_T 1545 * logged in (to default directory) 1546 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1547 * "CWD dir", logged in 1548 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1549 * "RETR file" 1550 * ftp://host//file dir="", urltype=FTP_URL_T 1551 * "CWD ", "RETR file" 1552 * host:/file dir="/", urltype=CLASSIC_URL_T 1553 * "CWD /", "RETR file" 1554 * ftp://host///file dir="/", urltype=FTP_URL_T 1555 * "CWD ", "CWD ", "RETR file" 1556 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1557 * "CWD /", "RETR file" 1558 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1559 * "CWD foo", "RETR file" 1560 * ftp://host/foo/bar/file dir="foo/bar" 1561 * "CWD foo", "CWD bar", "RETR file" 1562 * ftp://host//foo/bar/file dir="/foo/bar" 1563 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1564 * ftp://host/foo//bar/file dir="foo//bar" 1565 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1566 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1567 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1568 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1569 * "CWD /foo", "CWD bar", "RETR file" 1570 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1571 * "CWD /foo/bar", "RETR file" 1572 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1573 * "RETR /foo/bar/file" 1574 * 1575 * Note that we don't need `dir' after this point. 1576 */ 1577 do { 1578 if (urltype == FTP_URL_T) { 1579 nextpart = strchr(dir, '/'); 1580 if (nextpart) { 1581 *nextpart = '\0'; 1582 nextpart++; 1583 } 1584 url_decode(dir); 1585 } else 1586 nextpart = NULL; 1587 DPRINTF("dir `%s', nextpart `%s'\n", 1588 dir ? dir : "<null>", 1589 nextpart ? nextpart : "<null>"); 1590 if (urltype == FTP_URL_T || *dir != '\0') { 1591 xargv[0] = "cd"; 1592 xargv[1] = dir; 1593 xargv[2] = NULL; 1594 dirchange = 0; 1595 cd(2, xargv); 1596 if (! dirchange) { 1597 if (*dir == '\0' && code == 500) 1598 fprintf(stderr, 1599 "\n" 1600 "ftp: The `CWD ' command (without a directory), which is required by\n" 1601 " RFC3986 to support the empty directory in the URL pathname (`//'),\n" 1602 " conflicts with the server's conformance to RFC0959.\n" 1603 " Try the same URL without the `//' in the URL pathname.\n" 1604 "\n"); 1605 goto cleanup_fetch_ftp; 1606 } 1607 } 1608 dir = nextpart; 1609 } while (dir != NULL); 1610 } 1611 1612 if (EMPTYSTRING(file)) { 1613 rval = -1; 1614 goto cleanup_fetch_ftp; 1615 } 1616 1617 if (dirhasglob) { 1618 (void)strlcpy(rempath, dir, sizeof(rempath)); 1619 (void)strlcat(rempath, "/", sizeof(rempath)); 1620 (void)strlcat(rempath, file, sizeof(rempath)); 1621 file = rempath; 1622 } 1623 1624 /* Fetch the file(s). */ 1625 xargc = 2; 1626 xargv[0] = "get"; 1627 xargv[1] = file; 1628 xargv[2] = NULL; 1629 if (dirhasglob || filehasglob) { 1630 int ointeractive; 1631 1632 ointeractive = interactive; 1633 interactive = 0; 1634 if (restartautofetch) 1635 xargv[0] = "mreget"; 1636 else 1637 xargv[0] = "mget"; 1638 mget(xargc, xargv); 1639 interactive = ointeractive; 1640 } else { 1641 if (outfile == NULL) { 1642 cp = strrchr(file, '/'); /* find savefile */ 1643 if (cp != NULL) 1644 outfile = cp + 1; 1645 else 1646 outfile = file; 1647 } 1648 xargv[2] = (char *)outfile; 1649 xargv[3] = NULL; 1650 xargc++; 1651 if (restartautofetch) 1652 reget(xargc, xargv); 1653 else 1654 get(xargc, xargv); 1655 } 1656 1657 if ((code / 100) == COMPLETE) 1658 rval = 0; 1659 1660 cleanup_fetch_ftp: 1661 FREEPTR(port); 1662 FREEPTR(host); 1663 FREEPTR(path); 1664 FREEPTR(user); 1665 if (pass) 1666 memset(pass, 0, strlen(pass)); 1667 FREEPTR(pass); 1668 return (rval); 1669 } 1670 1671 /* 1672 * Retrieve the given file to outfile. 1673 * Supports arguments of the form: 1674 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1675 * call fetch_ftp() 1676 * "http://host/path" call fetch_url() to use HTTP 1677 * "file:///path" call fetch_url() to copy 1678 * "about:..." print a message 1679 * 1680 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1681 * is still open (e.g, ftp xfer with trailing /) 1682 */ 1683 static int 1684 go_fetch(const char *url) 1685 { 1686 char *proxy; 1687 1688 #ifndef NO_ABOUT 1689 /* 1690 * Check for about:* 1691 */ 1692 if (STRNEQUAL(url, ABOUT_URL)) { 1693 url += sizeof(ABOUT_URL) -1; 1694 if (strcasecmp(url, "ftp") == 0 || 1695 strcasecmp(url, "tnftp") == 0) { 1696 fputs( 1697 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1698 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1699 } else if (strcasecmp(url, "lukem") == 0) { 1700 fputs( 1701 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1702 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1703 } else if (strcasecmp(url, "netbsd") == 0) { 1704 fputs( 1705 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1706 "For more information, see http://www.NetBSD.org/\n", ttyout); 1707 } else if (strcasecmp(url, "version") == 0) { 1708 fprintf(ttyout, "Version: %s %s%s\n", 1709 FTP_PRODUCT, FTP_VERSION, 1710 #ifdef INET6 1711 "" 1712 #else 1713 " (-IPv6)" 1714 #endif 1715 ); 1716 } else { 1717 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1718 } 1719 fputs("\n", ttyout); 1720 return (0); 1721 } 1722 #endif 1723 1724 /* 1725 * Check for file:// and http:// URLs. 1726 */ 1727 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL)) 1728 return (fetch_url(url, NULL, NULL, NULL)); 1729 1730 /* 1731 * Try FTP URL-style and host:file arguments next. 1732 * If ftpproxy is set with an FTP URL, use fetch_url() 1733 * Othewise, use fetch_ftp(). 1734 */ 1735 proxy = getoptionvalue("ftp_proxy"); 1736 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL)) 1737 return (fetch_url(url, NULL, NULL, NULL)); 1738 1739 return (fetch_ftp(url)); 1740 } 1741 1742 /* 1743 * Retrieve multiple files from the command line, 1744 * calling go_fetch() for each file. 1745 * 1746 * If an ftp path has a trailing "/", the path will be cd-ed into and 1747 * the connection remains open, and the function will return -1 1748 * (to indicate the connection is alive). 1749 * If an error occurs the return value will be the offset+1 in 1750 * argv[] of the file that caused a problem (i.e, argv[x] 1751 * returns x+1) 1752 * Otherwise, 0 is returned if all files retrieved successfully. 1753 */ 1754 int 1755 auto_fetch(int argc, char *argv[]) 1756 { 1757 volatile int argpos, rval; 1758 1759 argpos = rval = 0; 1760 1761 if (sigsetjmp(toplevel, 1)) { 1762 if (connected) 1763 disconnect(0, NULL); 1764 if (rval > 0) 1765 rval = argpos + 1; 1766 return (rval); 1767 } 1768 (void)xsignal(SIGINT, intr); 1769 (void)xsignal(SIGPIPE, lostpeer); 1770 1771 /* 1772 * Loop through as long as there's files to fetch. 1773 */ 1774 for (; (rval == 0) && (argpos < argc); argpos++) { 1775 if (strchr(argv[argpos], ':') == NULL) 1776 break; 1777 redirect_loop = 0; 1778 if (!anonftp) 1779 anonftp = 2; /* Handle "automatic" transfers. */ 1780 rval = go_fetch(argv[argpos]); 1781 if (outfile != NULL && strcmp(outfile, "-") != 0 1782 && outfile[0] != '|') 1783 outfile = NULL; 1784 if (rval > 0) 1785 rval = argpos + 1; 1786 } 1787 1788 if (connected && rval != -1) 1789 disconnect(0, NULL); 1790 return (rval); 1791 } 1792 1793 1794 /* 1795 * Upload multiple files from the command line. 1796 * 1797 * If an error occurs the return value will be the offset+1 in 1798 * argv[] of the file that caused a problem (i.e, argv[x] 1799 * returns x+1) 1800 * Otherwise, 0 is returned if all files uploaded successfully. 1801 */ 1802 int 1803 auto_put(int argc, char **argv, const char *uploadserver) 1804 { 1805 char *uargv[4], *path, *pathsep; 1806 int uargc, rval, argpos; 1807 size_t len; 1808 1809 uargc = 0; 1810 uargv[uargc++] = "mput"; 1811 uargv[uargc++] = argv[0]; 1812 uargv[2] = uargv[3] = NULL; 1813 pathsep = NULL; 1814 rval = 1; 1815 1816 DPRINTF("auto_put: target `%s'\n", uploadserver); 1817 1818 path = ftp_strdup(uploadserver); 1819 len = strlen(path); 1820 if (path[len - 1] != '/' && path[len - 1] != ':') { 1821 /* 1822 * make sure we always pass a directory to auto_fetch 1823 */ 1824 if (argc > 1) { /* more than one file to upload */ 1825 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1826 free(path); 1827 path = (char *)ftp_malloc(len); 1828 (void)strlcpy(path, uploadserver, len); 1829 (void)strlcat(path, "/", len); 1830 } else { /* single file to upload */ 1831 uargv[0] = "put"; 1832 pathsep = strrchr(path, '/'); 1833 if (pathsep == NULL) { 1834 pathsep = strrchr(path, ':'); 1835 if (pathsep == NULL) { 1836 warnx("Invalid URL `%s'", path); 1837 goto cleanup_auto_put; 1838 } 1839 pathsep++; 1840 uargv[2] = ftp_strdup(pathsep); 1841 pathsep[0] = '/'; 1842 } else 1843 uargv[2] = ftp_strdup(pathsep + 1); 1844 pathsep[1] = '\0'; 1845 uargc++; 1846 } 1847 } 1848 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 1849 path, uargv[2] ? uargv[2] : "<null>"); 1850 1851 /* connect and cwd */ 1852 rval = auto_fetch(1, &path); 1853 if(rval >= 0) 1854 goto cleanup_auto_put; 1855 1856 rval = 0; 1857 1858 /* target filename provided; upload 1 file */ 1859 /* XXX : is this the best way? */ 1860 if (uargc == 3) { 1861 uargv[1] = argv[0]; 1862 put(uargc, uargv); 1863 if ((code / 100) != COMPLETE) 1864 rval = 1; 1865 } else { /* otherwise a target dir: upload all files to it */ 1866 for(argpos = 0; argv[argpos] != NULL; argpos++) { 1867 uargv[1] = argv[argpos]; 1868 mput(uargc, uargv); 1869 if ((code / 100) != COMPLETE) { 1870 rval = argpos + 1; 1871 break; 1872 } 1873 } 1874 } 1875 1876 cleanup_auto_put: 1877 free(path); 1878 FREEPTR(uargv[2]); 1879 return (rval); 1880 } 1881