1 /* $NetBSD: fetch.c,v 1.202 2013/02/23 13:47:36 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2009 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 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __RCSID("$NetBSD: fetch.c,v 1.202 2013/02/23 13:47:36 christos Exp $"); 38 #endif /* not lint */ 39 40 /* 41 * FTP User Program -- Command line file retrieval 42 */ 43 44 #include <sys/types.h> 45 #include <sys/param.h> 46 #include <sys/socket.h> 47 #include <sys/stat.h> 48 #include <sys/time.h> 49 50 #include <netinet/in.h> 51 52 #include <arpa/ftp.h> 53 #include <arpa/inet.h> 54 55 #include <assert.h> 56 #include <ctype.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <netdb.h> 60 #include <fcntl.h> 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #include <time.h> 66 67 #ifdef __minix 68 #include <utime.h> 69 #endif 70 71 #include "ssl.h" 72 #include "ftp_var.h" 73 #include "version.h" 74 75 typedef enum { 76 UNKNOWN_URL_T=-1, 77 HTTP_URL_T, 78 #ifdef WITH_SSL 79 HTTPS_URL_T, 80 #endif 81 FTP_URL_T, 82 FILE_URL_T, 83 CLASSIC_URL_T 84 } url_t; 85 86 __dead static void aborthttp(int); 87 #ifndef NO_AUTH 88 static int auth_url(const char *, char **, const char *, const char *); 89 static void base64_encode(const unsigned char *, size_t, unsigned char *); 90 #endif 91 static int go_fetch(const char *); 92 static int fetch_ftp(const char *); 93 static int fetch_url(const char *, const char *, char *, char *); 94 static const char *match_token(const char **, const char *); 95 static int parse_url(const char *, const char *, url_t *, char **, 96 char **, char **, char **, in_port_t *, char **); 97 static void url_decode(char *); 98 99 static int redirect_loop; 100 101 102 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0) 103 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t') 104 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0) 105 106 107 #define ABOUT_URL "about:" /* propaganda */ 108 #define FILE_URL "file://" /* file URL prefix */ 109 #define FTP_URL "ftp://" /* ftp URL prefix */ 110 #define HTTP_URL "http://" /* http URL prefix */ 111 #ifdef WITH_SSL 112 #define HTTPS_URL "https://" /* https URL prefix */ 113 114 #define IS_HTTP_TYPE(urltype) \ 115 (((urltype) == HTTP_URL_T) || ((urltype) == HTTPS_URL_T)) 116 #else 117 #define IS_HTTP_TYPE(urltype) \ 118 ((urltype) == HTTP_URL_T) 119 #endif 120 121 /* 122 * Determine if token is the next word in buf (case insensitive). 123 * If so, advance buf past the token and any trailing LWS, and 124 * return a pointer to the token (in buf). Otherwise, return NULL. 125 * token may be preceded by LWS. 126 * token must be followed by LWS or NUL. (I.e, don't partial match). 127 */ 128 static const char * 129 match_token(const char **buf, const char *token) 130 { 131 const char *p, *orig; 132 size_t tlen; 133 134 tlen = strlen(token); 135 p = *buf; 136 SKIPLWS(p); 137 orig = p; 138 if (strncasecmp(p, token, tlen) != 0) 139 return NULL; 140 p += tlen; 141 if (*p != '\0' && !ISLWS(*p)) 142 return NULL; 143 SKIPLWS(p); 144 orig = *buf; 145 *buf = p; 146 return orig; 147 } 148 149 #ifndef NO_AUTH 150 /* 151 * Generate authorization response based on given authentication challenge. 152 * Returns -1 if an error occurred, otherwise 0. 153 * Sets response to a malloc(3)ed string; caller should free. 154 */ 155 static int 156 auth_url(const char *challenge, char **response, const char *guser, 157 const char *gpass) 158 { 159 const char *cp, *scheme, *errormsg; 160 char *ep, *clear, *realm; 161 char uuser[BUFSIZ], *gotpass; 162 const char *upass; 163 int rval; 164 size_t len, clen, rlen; 165 166 *response = NULL; 167 clear = realm = NULL; 168 rval = -1; 169 cp = challenge; 170 scheme = "Basic"; /* only support Basic authentication */ 171 gotpass = NULL; 172 173 DPRINTF("auth_url: challenge `%s'\n", challenge); 174 175 if (! match_token(&cp, scheme)) { 176 warnx("Unsupported authentication challenge `%s'", 177 challenge); 178 goto cleanup_auth_url; 179 } 180 181 #define REALM "realm=\"" 182 if (STRNEQUAL(cp, REALM)) 183 cp += sizeof(REALM) - 1; 184 else { 185 warnx("Unsupported authentication challenge `%s'", 186 challenge); 187 goto cleanup_auth_url; 188 } 189 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 190 if ((ep = strchr(cp, '\"')) != NULL) { 191 len = ep - cp; 192 realm = (char *)ftp_malloc(len + 1); 193 (void)strlcpy(realm, cp, len + 1); 194 } else { 195 warnx("Unsupported authentication challenge `%s'", 196 challenge); 197 goto cleanup_auth_url; 198 } 199 200 fprintf(ttyout, "Username for `%s': ", realm); 201 if (guser != NULL) { 202 (void)strlcpy(uuser, guser, sizeof(uuser)); 203 fprintf(ttyout, "%s\n", uuser); 204 } else { 205 (void)fflush(ttyout); 206 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) { 207 warnx("%s; can't authenticate", errormsg); 208 goto cleanup_auth_url; 209 } 210 } 211 if (gpass != NULL) 212 upass = gpass; 213 else { 214 gotpass = getpass("Password: "); 215 if (gotpass == NULL) { 216 warnx("Can't read password"); 217 goto cleanup_auth_url; 218 } 219 upass = gotpass; 220 } 221 222 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */ 223 clear = (char *)ftp_malloc(clen); 224 (void)strlcpy(clear, uuser, clen); 225 (void)strlcat(clear, ":", clen); 226 (void)strlcat(clear, upass, clen); 227 if (gotpass) 228 memset(gotpass, 0, strlen(gotpass)); 229 230 /* scheme + " " + enc + "\0" */ 231 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 232 *response = (char *)ftp_malloc(rlen); 233 (void)strlcpy(*response, scheme, rlen); 234 len = strlcat(*response, " ", rlen); 235 /* use `clen - 1' to not encode the trailing NUL */ 236 base64_encode((unsigned char *)clear, clen - 1, 237 (unsigned char *)*response + len); 238 memset(clear, 0, clen); 239 rval = 0; 240 241 cleanup_auth_url: 242 FREEPTR(clear); 243 FREEPTR(realm); 244 return (rval); 245 } 246 247 /* 248 * Encode len bytes starting at clear using base64 encoding into encoded, 249 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 250 */ 251 static void 252 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 253 { 254 static const unsigned char enc[] = 255 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 256 unsigned char *cp; 257 size_t i; 258 259 cp = encoded; 260 for (i = 0; i < len; i += 3) { 261 *(cp++) = enc[((clear[i + 0] >> 2))]; 262 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 263 | ((clear[i + 1] >> 4) & 0x0f)]; 264 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 265 | ((clear[i + 2] >> 6) & 0x03)]; 266 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 267 } 268 *cp = '\0'; 269 while (i-- > len) 270 *(--cp) = '='; 271 } 272 #endif 273 274 /* 275 * Decode %xx escapes in given string, `in-place'. 276 */ 277 static void 278 url_decode(char *url) 279 { 280 unsigned char *p, *q; 281 282 if (EMPTYSTRING(url)) 283 return; 284 p = q = (unsigned char *)url; 285 286 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 287 while (*p) { 288 if (p[0] == '%' 289 && p[1] && isxdigit((unsigned char)p[1]) 290 && p[2] && isxdigit((unsigned char)p[2])) { 291 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 292 p+=3; 293 } else 294 *q++ = *p++; 295 } 296 *q = '\0'; 297 } 298 299 300 /* 301 * Parse URL of form (per RFC 3986): 302 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 303 * Returns -1 if a parse error occurred, otherwise 0. 304 * It's the caller's responsibility to url_decode() the returned 305 * user, pass and path. 306 * 307 * Sets type to url_t, each of the given char ** pointers to a 308 * malloc(3)ed strings of the relevant section, and port to 309 * the number given, or ftpport if ftp://, or httpport if http://. 310 * 311 * XXX: this is not totally RFC 3986 compliant; <path> will have the 312 * leading `/' unless it's an ftp:// URL, as this makes things easier 313 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 314 * host and the URL-path removed, but any additional leading slashes 315 * in the URL-path are retained (because they imply that we should 316 * later do "CWD" with a null argument). 317 * 318 * Examples: 319 * input URL output path 320 * --------- ----------- 321 * "http://host" "/" 322 * "http://host/" "/" 323 * "http://host/path" "/path" 324 * "file://host/dir/file" "dir/file" 325 * "ftp://host" "" 326 * "ftp://host/" "" 327 * "ftp://host//" "/" 328 * "ftp://host/dir/file" "dir/file" 329 * "ftp://host//dir/file" "/dir/file" 330 */ 331 static int 332 parse_url(const char *url, const char *desc, url_t *utype, 333 char **uuser, char **pass, char **host, char **port, 334 in_port_t *portnum, char **path) 335 { 336 const char *origurl, *tport; 337 char *cp, *ep, *thost; 338 size_t len; 339 340 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL 341 || pass == NULL || host == NULL || port == NULL || portnum == NULL 342 || path == NULL) 343 errx(1, "parse_url: invoked with NULL argument!"); 344 DPRINTF("parse_url: %s `%s'\n", desc, url); 345 346 origurl = url; 347 *utype = UNKNOWN_URL_T; 348 *uuser = *pass = *host = *port = *path = NULL; 349 *portnum = 0; 350 tport = NULL; 351 352 if (STRNEQUAL(url, HTTP_URL)) { 353 url += sizeof(HTTP_URL) - 1; 354 *utype = HTTP_URL_T; 355 *portnum = HTTP_PORT; 356 tport = httpport; 357 } else if (STRNEQUAL(url, FTP_URL)) { 358 url += sizeof(FTP_URL) - 1; 359 *utype = FTP_URL_T; 360 *portnum = FTP_PORT; 361 tport = ftpport; 362 } else if (STRNEQUAL(url, FILE_URL)) { 363 url += sizeof(FILE_URL) - 1; 364 *utype = FILE_URL_T; 365 #ifdef WITH_SSL 366 } else if (STRNEQUAL(url, HTTPS_URL)) { 367 url += sizeof(HTTPS_URL) - 1; 368 *utype = HTTPS_URL_T; 369 *portnum = HTTPS_PORT; 370 tport = httpsport; 371 #endif 372 } else { 373 warnx("Invalid %s `%s'", desc, url); 374 cleanup_parse_url: 375 FREEPTR(*uuser); 376 if (*pass != NULL) 377 memset(*pass, 0, strlen(*pass)); 378 FREEPTR(*pass); 379 FREEPTR(*host); 380 FREEPTR(*port); 381 FREEPTR(*path); 382 return (-1); 383 } 384 385 if (*url == '\0') 386 return (0); 387 388 /* find [user[:pass]@]host[:port] */ 389 ep = strchr(url, '/'); 390 if (ep == NULL) 391 thost = ftp_strdup(url); 392 else { 393 len = ep - url; 394 thost = (char *)ftp_malloc(len + 1); 395 (void)strlcpy(thost, url, len + 1); 396 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */ 397 ep++; 398 *path = ftp_strdup(ep); 399 } 400 401 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 402 if (cp != NULL) { 403 if (*utype == FTP_URL_T) 404 anonftp = 0; /* disable anonftp */ 405 *uuser = thost; 406 *cp = '\0'; 407 thost = ftp_strdup(cp + 1); 408 cp = strchr(*uuser, ':'); 409 if (cp != NULL) { 410 *cp = '\0'; 411 *pass = ftp_strdup(cp + 1); 412 } 413 url_decode(*uuser); 414 if (*pass) 415 url_decode(*pass); 416 } 417 418 #ifdef INET6 419 /* 420 * Check if thost is an encoded IPv6 address, as per 421 * RFC 3986: 422 * `[' ipv6-address ']' 423 */ 424 if (*thost == '[') { 425 cp = thost + 1; 426 if ((ep = strchr(cp, ']')) == NULL || 427 (ep[1] != '\0' && ep[1] != ':')) { 428 warnx("Invalid address `%s' in %s `%s'", 429 thost, desc, origurl); 430 goto cleanup_parse_url; 431 } 432 len = ep - cp; /* change `[xyz]' -> `xyz' */ 433 memmove(thost, thost + 1, len); 434 thost[len] = '\0'; 435 if (! isipv6addr(thost)) { 436 warnx("Invalid IPv6 address `%s' in %s `%s'", 437 thost, desc, origurl); 438 goto cleanup_parse_url; 439 } 440 cp = ep + 1; 441 if (*cp == ':') 442 cp++; 443 else 444 cp = NULL; 445 } else 446 #endif /* INET6 */ 447 if ((cp = strchr(thost, ':')) != NULL) 448 *cp++ = '\0'; 449 *host = thost; 450 451 /* look for [:port] */ 452 if (cp != NULL) { 453 unsigned long nport; 454 455 nport = strtoul(cp, &ep, 10); 456 if (*cp == '\0' || *ep != '\0' || 457 nport < 1 || nport > MAX_IN_PORT_T) { 458 warnx("Unknown port `%s' in %s `%s'", 459 cp, desc, origurl); 460 goto cleanup_parse_url; 461 } 462 *portnum = nport; 463 tport = cp; 464 } 465 466 if (tport != NULL) 467 *port = ftp_strdup(tport); 468 if (*path == NULL) { 469 const char *emptypath = "/"; 470 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */ 471 emptypath++; 472 *path = ftp_strdup(emptypath); 473 } 474 475 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 476 "path `%s'\n", 477 STRorNULL(*uuser), STRorNULL(*pass), 478 STRorNULL(*host), STRorNULL(*port), 479 *portnum ? *portnum : -1, STRorNULL(*path)); 480 481 return (0); 482 } 483 484 sigjmp_buf httpabort; 485 486 /* 487 * Retrieve URL, via a proxy if necessary, using HTTP. 488 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 489 * http_proxy/https_proxy as appropriate. 490 * Supports HTTP redirects. 491 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 492 * is still open (e.g, ftp xfer with trailing /) 493 */ 494 static int 495 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 496 { 497 struct addrinfo hints, *res, *res0 = NULL; 498 int error; 499 sigfunc volatile oldintr; 500 sigfunc volatile oldintp; 501 int volatile s; 502 struct stat sb; 503 int volatile ischunked; 504 int volatile isproxy; 505 int volatile rval; 506 int volatile hcode; 507 int len; 508 size_t flen; 509 static size_t bufsize; 510 static char *xferbuf; 511 const char *cp, *token; 512 char *ep; 513 char buf[FTPBUFLEN]; 514 const char *errormsg; 515 char *volatile savefile; 516 char *volatile auth; 517 char *volatile location; 518 char *volatile message; 519 char *uuser, *pass, *host, *port, *path; 520 char *volatile decodedpath; 521 char *puser, *ppass, *useragent; 522 off_t hashbytes, rangestart, rangeend, entitylen; 523 int (*volatile closefunc)(FILE *); 524 FETCH *volatile fin; 525 FILE *volatile fout; 526 time_t mtime; 527 url_t urltype; 528 in_port_t portnum; 529 #ifdef WITH_SSL 530 void *ssl; 531 #endif 532 533 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv)); 534 535 oldintr = oldintp = NULL; 536 closefunc = NULL; 537 fin = NULL; 538 fout = NULL; 539 s = -1; 540 savefile = NULL; 541 auth = location = message = NULL; 542 ischunked = isproxy = hcode = 0; 543 rval = 1; 544 uuser = pass = host = path = decodedpath = puser = ppass = NULL; 545 546 if (parse_url(url, "URL", &urltype, &uuser, &pass, &host, &port, 547 &portnum, &path) == -1) 548 goto cleanup_fetch_url; 549 550 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 551 && strcasecmp(host, "localhost") != 0) { 552 warnx("No support for non local file URL `%s'", url); 553 goto cleanup_fetch_url; 554 } 555 556 if (EMPTYSTRING(path)) { 557 if (urltype == FTP_URL_T) { 558 rval = fetch_ftp(url); 559 goto cleanup_fetch_url; 560 } 561 if (!IS_HTTP_TYPE(urltype) || outfile == NULL) { 562 warnx("Invalid URL (no file after host) `%s'", url); 563 goto cleanup_fetch_url; 564 } 565 } 566 567 decodedpath = ftp_strdup(path); 568 url_decode(decodedpath); 569 570 if (outfile) 571 savefile = ftp_strdup(outfile); 572 else { 573 cp = strrchr(decodedpath, '/'); /* find savefile */ 574 if (cp != NULL) 575 savefile = ftp_strdup(cp + 1); 576 else 577 savefile = ftp_strdup(decodedpath); 578 } 579 DPRINTF("fetch_url: savefile `%s'\n", savefile); 580 if (EMPTYSTRING(savefile)) { 581 if (urltype == FTP_URL_T) { 582 rval = fetch_ftp(url); 583 goto cleanup_fetch_url; 584 } 585 warnx("No file after directory (you must specify an " 586 "output file) `%s'", url); 587 goto cleanup_fetch_url; 588 } 589 590 restart_point = 0; 591 filesize = -1; 592 rangestart = rangeend = entitylen = -1; 593 mtime = -1; 594 if (restartautofetch) { 595 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 596 stat(savefile, &sb) == 0) 597 restart_point = sb.st_size; 598 } 599 if (urltype == FILE_URL_T) { /* file:// URLs */ 600 direction = "copied"; 601 fin = fetch_open(decodedpath, "r"); 602 if (fin == NULL) { 603 warn("Can't open `%s'", decodedpath); 604 goto cleanup_fetch_url; 605 } 606 if (fstat(fetch_fileno(fin), &sb) == 0) { 607 mtime = sb.st_mtime; 608 filesize = sb.st_size; 609 } 610 if (restart_point) { 611 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 612 warn("Can't seek to restart `%s'", 613 decodedpath); 614 goto cleanup_fetch_url; 615 } 616 } 617 if (verbose) { 618 fprintf(ttyout, "Copying %s", decodedpath); 619 if (restart_point) 620 fprintf(ttyout, " (restarting at " LLF ")", 621 (LLT)restart_point); 622 fputs("\n", ttyout); 623 } 624 if (0 == rcvbuf_size) { 625 rcvbuf_size = 8 * 1024; /* XXX */ 626 } 627 } else { /* ftp:// or http:// URLs */ 628 const char *leading; 629 int hasleading; 630 631 if (proxyenv == NULL) { 632 #ifdef WITH_SSL 633 if (urltype == HTTPS_URL_T) 634 proxyenv = getoptionvalue("https_proxy"); 635 #endif 636 if (proxyenv == NULL && IS_HTTP_TYPE(urltype)) 637 proxyenv = getoptionvalue("http_proxy"); 638 else if (urltype == FTP_URL_T) 639 proxyenv = getoptionvalue("ftp_proxy"); 640 } 641 direction = "retrieved"; 642 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 643 url_t purltype; 644 char *phost, *ppath; 645 char *pport, *no_proxy; 646 in_port_t pportnum; 647 648 isproxy = 1; 649 650 /* check URL against list of no_proxied sites */ 651 no_proxy = getoptionvalue("no_proxy"); 652 if (! EMPTYSTRING(no_proxy)) { 653 char *np, *np_copy, *np_iter; 654 unsigned long np_port; 655 size_t hlen, plen; 656 657 np_iter = np_copy = ftp_strdup(no_proxy); 658 hlen = strlen(host); 659 while ((cp = strsep(&np_iter, " ,")) != NULL) { 660 if (*cp == '\0') 661 continue; 662 if ((np = strrchr(cp, ':')) != NULL) { 663 *np++ = '\0'; 664 np_port = strtoul(np, &ep, 10); 665 if (*np == '\0' || *ep != '\0') 666 continue; 667 if (np_port != portnum) 668 continue; 669 } 670 plen = strlen(cp); 671 if (hlen < plen) 672 continue; 673 if (strncasecmp(host + hlen - plen, 674 cp, plen) == 0) { 675 isproxy = 0; 676 break; 677 } 678 } 679 FREEPTR(np_copy); 680 if (isproxy == 0 && urltype == FTP_URL_T) { 681 rval = fetch_ftp(url); 682 goto cleanup_fetch_url; 683 } 684 } 685 686 if (isproxy) { 687 if (restart_point) { 688 warnx("Can't restart via proxy URL `%s'", 689 proxyenv); 690 goto cleanup_fetch_url; 691 } 692 if (parse_url(proxyenv, "proxy URL", &purltype, 693 &puser, &ppass, &phost, &pport, &pportnum, 694 &ppath) == -1) 695 goto cleanup_fetch_url; 696 697 if ((!IS_HTTP_TYPE(purltype) 698 && purltype != FTP_URL_T) || 699 EMPTYSTRING(phost) || 700 (! EMPTYSTRING(ppath) 701 && strcmp(ppath, "/") != 0)) { 702 warnx("Malformed proxy URL `%s'", 703 proxyenv); 704 FREEPTR(phost); 705 FREEPTR(pport); 706 FREEPTR(ppath); 707 goto cleanup_fetch_url; 708 } 709 if (isipv6addr(host) && 710 strchr(host, '%') != NULL) { 711 warnx( 712 "Scoped address notation `%s' disallowed via web proxy", 713 host); 714 FREEPTR(phost); 715 FREEPTR(pport); 716 FREEPTR(ppath); 717 goto cleanup_fetch_url; 718 } 719 720 FREEPTR(host); 721 host = phost; 722 FREEPTR(port); 723 port = pport; 724 FREEPTR(path); 725 path = ftp_strdup(url); 726 FREEPTR(ppath); 727 urltype = purltype; 728 } 729 } /* ! EMPTYSTRING(proxyenv) */ 730 731 memset(&hints, 0, sizeof(hints)); 732 hints.ai_flags = 0; 733 hints.ai_family = family; 734 hints.ai_socktype = SOCK_STREAM; 735 hints.ai_protocol = 0; 736 error = getaddrinfo(host, port, &hints, &res0); 737 if (error) { 738 warnx("Can't LOOKUP `%s:%s': %s", host, port, 739 (error == EAI_SYSTEM) ? strerror(errno) 740 : gai_strerror(error)); 741 goto cleanup_fetch_url; 742 } 743 if (res0->ai_canonname) 744 host = res0->ai_canonname; 745 746 s = -1; 747 #ifdef WITH_SSL 748 ssl = NULL; 749 #endif 750 for (res = res0; res; res = res->ai_next) { 751 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 752 753 ai_unmapped(res); 754 if (getnameinfo(res->ai_addr, res->ai_addrlen, 755 hname, sizeof(hname), sname, sizeof(sname), 756 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 757 strlcpy(hname, "?", sizeof(hname)); 758 strlcpy(sname, "?", sizeof(sname)); 759 } 760 761 if (verbose && res0->ai_next) { 762 fprintf(ttyout, "Trying %s:%s ...\n", 763 hname, sname); 764 } 765 766 s = socket(res->ai_family, SOCK_STREAM, 767 res->ai_protocol); 768 if (s < 0) { 769 warn( 770 "Can't create socket for connection to " 771 "`%s:%s'", hname, sname); 772 continue; 773 } 774 775 if (ftp_connect(s, res->ai_addr, res->ai_addrlen, 776 verbose || !res->ai_next) < 0) { 777 close(s); 778 s = -1; 779 continue; 780 } 781 782 #ifdef WITH_SSL 783 if (urltype == HTTPS_URL_T) { 784 if ((ssl = fetch_start_ssl(s)) == NULL) { 785 close(s); 786 s = -1; 787 continue; 788 } 789 } 790 #endif 791 792 /* success */ 793 break; 794 } 795 796 if (s < 0) { 797 warnx("Can't connect to `%s:%s'", host, port); 798 goto cleanup_fetch_url; 799 } 800 801 fin = fetch_fdopen(s, "r+"); 802 fetch_set_ssl(fin, ssl); 803 804 /* 805 * Construct and send the request. 806 */ 807 if (verbose) 808 fprintf(ttyout, "Requesting %s\n", url); 809 leading = " ("; 810 hasleading = 0; 811 if (isproxy) { 812 if (verbose) { 813 fprintf(ttyout, "%svia %s:%s", leading, 814 host, port); 815 leading = ", "; 816 hasleading++; 817 } 818 fetch_printf(fin, "GET %s HTTP/1.0\r\n", path); 819 if (flushcache) 820 fetch_printf(fin, "Pragma: no-cache\r\n"); 821 } else { 822 fetch_printf(fin, "GET %s HTTP/1.1\r\n", path); 823 if (strchr(host, ':')) { 824 char *h, *p; 825 826 /* 827 * strip off IPv6 scope identifier, since it is 828 * local to the node 829 */ 830 h = ftp_strdup(host); 831 if (isipv6addr(h) && 832 (p = strchr(h, '%')) != NULL) { 833 *p = '\0'; 834 } 835 fetch_printf(fin, "Host: [%s]", h); 836 free(h); 837 } else 838 fetch_printf(fin, "Host: %s", host); 839 #ifdef WITH_SSL 840 if ((urltype == HTTP_URL_T && portnum != HTTP_PORT) || 841 (urltype == HTTPS_URL_T && portnum != HTTPS_PORT)) 842 #else 843 if (portnum != HTTP_PORT) 844 #endif 845 fetch_printf(fin, ":%u", portnum); 846 fetch_printf(fin, "\r\n"); 847 fetch_printf(fin, "Accept: */*\r\n"); 848 fetch_printf(fin, "Connection: close\r\n"); 849 if (restart_point) { 850 fputs(leading, ttyout); 851 fetch_printf(fin, "Range: bytes=" LLF "-\r\n", 852 (LLT)restart_point); 853 fprintf(ttyout, "restarting at " LLF, 854 (LLT)restart_point); 855 leading = ", "; 856 hasleading++; 857 } 858 if (flushcache) 859 fetch_printf(fin, "Cache-Control: no-cache\r\n"); 860 } 861 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 862 fetch_printf(fin, "User-Agent: %s\r\n", useragent); 863 } else { 864 fetch_printf(fin, "User-Agent: %s/%s\r\n", 865 FTP_PRODUCT, FTP_VERSION); 866 } 867 if (wwwauth) { 868 if (verbose) { 869 fprintf(ttyout, "%swith authorization", 870 leading); 871 leading = ", "; 872 hasleading++; 873 } 874 fetch_printf(fin, "Authorization: %s\r\n", wwwauth); 875 } 876 if (proxyauth) { 877 if (verbose) { 878 fprintf(ttyout, 879 "%swith proxy authorization", leading); 880 leading = ", "; 881 hasleading++; 882 } 883 fetch_printf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 884 } 885 if (verbose && hasleading) 886 fputs(")\n", ttyout); 887 fetch_printf(fin, "\r\n"); 888 if (fetch_flush(fin) == EOF) { 889 warn("Writing HTTP request"); 890 goto cleanup_fetch_url; 891 } 892 893 /* Read the response */ 894 len = fetch_getline(fin, buf, sizeof(buf), &errormsg); 895 if (len < 0) { 896 if (*errormsg == '\n') 897 errormsg++; 898 warnx("Receiving HTTP reply: %s", errormsg); 899 goto cleanup_fetch_url; 900 } 901 while (len > 0 && (ISLWS(buf[len-1]))) 902 buf[--len] = '\0'; 903 DPRINTF("fetch_url: received `%s'\n", buf); 904 905 /* Determine HTTP response code */ 906 cp = strchr(buf, ' '); 907 if (cp == NULL) 908 goto improper; 909 else 910 cp++; 911 hcode = strtol(cp, &ep, 10); 912 if (*ep != '\0' && !isspace((unsigned char)*ep)) 913 goto improper; 914 message = ftp_strdup(cp); 915 916 /* Read the rest of the header. */ 917 while (1) { 918 len = fetch_getline(fin, buf, sizeof(buf), &errormsg); 919 if (len < 0) { 920 if (*errormsg == '\n') 921 errormsg++; 922 warnx("Receiving HTTP reply: %s", errormsg); 923 goto cleanup_fetch_url; 924 } 925 while (len > 0 && (ISLWS(buf[len-1]))) 926 buf[--len] = '\0'; 927 if (len == 0) 928 break; 929 DPRINTF("fetch_url: received `%s'\n", buf); 930 931 /* 932 * Look for some headers 933 */ 934 935 cp = buf; 936 937 if (match_token(&cp, "Content-Length:")) { 938 filesize = STRTOLL(cp, &ep, 10); 939 if (filesize < 0 || *ep != '\0') 940 goto improper; 941 DPRINTF("fetch_url: parsed len as: " LLF "\n", 942 (LLT)filesize); 943 944 } else if (match_token(&cp, "Content-Range:")) { 945 if (! match_token(&cp, "bytes")) 946 goto improper; 947 948 if (*cp == '*') 949 cp++; 950 else { 951 rangestart = STRTOLL(cp, &ep, 10); 952 if (rangestart < 0 || *ep != '-') 953 goto improper; 954 cp = ep + 1; 955 rangeend = STRTOLL(cp, &ep, 10); 956 if (rangeend < 0 || rangeend < rangestart) 957 goto improper; 958 cp = ep; 959 } 960 if (*cp != '/') 961 goto improper; 962 cp++; 963 if (*cp == '*') 964 cp++; 965 else { 966 entitylen = STRTOLL(cp, &ep, 10); 967 if (entitylen < 0) 968 goto improper; 969 cp = ep; 970 } 971 if (*cp != '\0') 972 goto improper; 973 974 #ifndef NO_DEBUG 975 if (ftp_debug) { 976 fprintf(ttyout, "parsed range as: "); 977 if (rangestart == -1) 978 fprintf(ttyout, "*"); 979 else 980 fprintf(ttyout, LLF "-" LLF, 981 (LLT)rangestart, 982 (LLT)rangeend); 983 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 984 } 985 #endif 986 if (! restart_point) { 987 warnx( 988 "Received unexpected Content-Range header"); 989 goto cleanup_fetch_url; 990 } 991 992 } else if (match_token(&cp, "Last-Modified:")) { 993 struct tm parsed; 994 const char *t; 995 996 memset(&parsed, 0, sizeof(parsed)); 997 t = parse_rfc2616time(&parsed, cp); 998 if (t != NULL) { 999 parsed.tm_isdst = -1; 1000 if (*t == '\0') 1001 mtime = timegm(&parsed); 1002 #ifndef NO_DEBUG 1003 if (ftp_debug && mtime != -1) { 1004 fprintf(ttyout, 1005 "parsed time as: %s", 1006 rfc2822time(localtime(&mtime))); 1007 } 1008 #endif 1009 } 1010 1011 } else if (match_token(&cp, "Location:")) { 1012 location = ftp_strdup(cp); 1013 DPRINTF("fetch_url: parsed location as `%s'\n", 1014 cp); 1015 1016 } else if (match_token(&cp, "Transfer-Encoding:")) { 1017 if (match_token(&cp, "binary")) { 1018 warnx( 1019 "Bogus transfer encoding `binary' (fetching anyway)"); 1020 continue; 1021 } 1022 if (! (token = match_token(&cp, "chunked"))) { 1023 warnx( 1024 "Unsupported transfer encoding `%s'", 1025 token); 1026 goto cleanup_fetch_url; 1027 } 1028 ischunked++; 1029 DPRINTF("fetch_url: using chunked encoding\n"); 1030 1031 } else if (match_token(&cp, "Proxy-Authenticate:") 1032 || match_token(&cp, "WWW-Authenticate:")) { 1033 if (! (token = match_token(&cp, "Basic"))) { 1034 DPRINTF( 1035 "fetch_url: skipping unknown auth scheme `%s'\n", 1036 token); 1037 continue; 1038 } 1039 FREEPTR(auth); 1040 auth = ftp_strdup(token); 1041 DPRINTF("fetch_url: parsed auth as `%s'\n", cp); 1042 } 1043 1044 } 1045 /* finished parsing header */ 1046 1047 switch (hcode) { 1048 case 200: 1049 break; 1050 case 206: 1051 if (! restart_point) { 1052 warnx("Not expecting partial content header"); 1053 goto cleanup_fetch_url; 1054 } 1055 break; 1056 case 300: 1057 case 301: 1058 case 302: 1059 case 303: 1060 case 305: 1061 case 307: 1062 if (EMPTYSTRING(location)) { 1063 warnx( 1064 "No redirection Location provided by server"); 1065 goto cleanup_fetch_url; 1066 } 1067 if (redirect_loop++ > 5) { 1068 warnx("Too many redirections requested"); 1069 goto cleanup_fetch_url; 1070 } 1071 if (hcode == 305) { 1072 if (verbose) 1073 fprintf(ttyout, "Redirected via %s\n", 1074 location); 1075 rval = fetch_url(url, location, 1076 proxyauth, wwwauth); 1077 } else { 1078 if (verbose) 1079 fprintf(ttyout, "Redirected to %s\n", 1080 location); 1081 rval = go_fetch(location); 1082 } 1083 goto cleanup_fetch_url; 1084 #ifndef NO_AUTH 1085 case 401: 1086 case 407: 1087 { 1088 char **authp; 1089 char *auser, *apass; 1090 1091 if (hcode == 401) { 1092 authp = &wwwauth; 1093 auser = uuser; 1094 apass = pass; 1095 } else { 1096 authp = &proxyauth; 1097 auser = puser; 1098 apass = ppass; 1099 } 1100 if (verbose || *authp == NULL || 1101 auser == NULL || apass == NULL) 1102 fprintf(ttyout, "%s\n", message); 1103 if (EMPTYSTRING(auth)) { 1104 warnx( 1105 "No authentication challenge provided by server"); 1106 goto cleanup_fetch_url; 1107 } 1108 if (*authp != NULL) { 1109 char reply[10]; 1110 1111 fprintf(ttyout, 1112 "Authorization failed. Retry (y/n)? "); 1113 if (get_line(stdin, reply, sizeof(reply), NULL) 1114 < 0) { 1115 goto cleanup_fetch_url; 1116 } 1117 if (tolower((unsigned char)reply[0]) != 'y') 1118 goto cleanup_fetch_url; 1119 auser = NULL; 1120 apass = NULL; 1121 } 1122 if (auth_url(auth, authp, auser, apass) == 0) { 1123 rval = fetch_url(url, proxyenv, 1124 proxyauth, wwwauth); 1125 memset(*authp, 0, strlen(*authp)); 1126 FREEPTR(*authp); 1127 } 1128 goto cleanup_fetch_url; 1129 } 1130 #endif 1131 default: 1132 if (message) 1133 warnx("Error retrieving file `%s'", message); 1134 else 1135 warnx("Unknown error retrieving file"); 1136 goto cleanup_fetch_url; 1137 } 1138 } /* end of ftp:// or http:// specific setup */ 1139 1140 /* Open the output file. */ 1141 if (strcmp(savefile, "-") == 0) { 1142 fout = stdout; 1143 } else if (*savefile == '|') { 1144 oldintp = xsignal(SIGPIPE, SIG_IGN); 1145 fout = popen(savefile + 1, "w"); 1146 if (fout == NULL) { 1147 warn("Can't execute `%s'", savefile + 1); 1148 goto cleanup_fetch_url; 1149 } 1150 closefunc = pclose; 1151 } else { 1152 if ((rangeend != -1 && rangeend <= restart_point) || 1153 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1154 /* already done */ 1155 if (verbose) 1156 fprintf(ttyout, "already done\n"); 1157 rval = 0; 1158 goto cleanup_fetch_url; 1159 } 1160 if (restart_point && rangestart != -1) { 1161 if (entitylen != -1) 1162 filesize = entitylen; 1163 if (rangestart != restart_point) { 1164 warnx( 1165 "Size of `%s' differs from save file `%s'", 1166 url, savefile); 1167 goto cleanup_fetch_url; 1168 } 1169 fout = fopen(savefile, "a"); 1170 } else 1171 fout = fopen(savefile, "w"); 1172 if (fout == NULL) { 1173 warn("Can't open `%s'", savefile); 1174 goto cleanup_fetch_url; 1175 } 1176 closefunc = fclose; 1177 } 1178 1179 /* Trap signals */ 1180 if (sigsetjmp(httpabort, 1)) 1181 goto cleanup_fetch_url; 1182 (void)xsignal(SIGQUIT, psummary); 1183 oldintr = xsignal(SIGINT, aborthttp); 1184 1185 assert(rcvbuf_size > 0); 1186 if ((size_t)rcvbuf_size > bufsize) { 1187 if (xferbuf) 1188 (void)free(xferbuf); 1189 bufsize = rcvbuf_size; 1190 xferbuf = ftp_malloc(bufsize); 1191 } 1192 1193 bytes = 0; 1194 hashbytes = mark; 1195 progressmeter(-1); 1196 1197 /* Finally, suck down the file. */ 1198 do { 1199 long chunksize; 1200 short lastchunk; 1201 1202 chunksize = 0; 1203 lastchunk = 0; 1204 /* read chunk-size */ 1205 if (ischunked) { 1206 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1207 warnx("Unexpected EOF reading chunk-size"); 1208 goto cleanup_fetch_url; 1209 } 1210 errno = 0; 1211 chunksize = strtol(xferbuf, &ep, 16); 1212 if (ep == xferbuf) { 1213 warnx("Invalid chunk-size"); 1214 goto cleanup_fetch_url; 1215 } 1216 if (errno == ERANGE || chunksize < 0) { 1217 errno = ERANGE; 1218 warn("Chunk-size `%.*s'", 1219 (int)(ep-xferbuf), xferbuf); 1220 goto cleanup_fetch_url; 1221 } 1222 1223 /* 1224 * XXX: Work around bug in Apache 1.3.9 and 1225 * 1.3.11, which incorrectly put trailing 1226 * space after the chunk-size. 1227 */ 1228 while (*ep == ' ') 1229 ep++; 1230 1231 /* skip [ chunk-ext ] */ 1232 if (*ep == ';') { 1233 while (*ep && *ep != '\r') 1234 ep++; 1235 } 1236 1237 if (strcmp(ep, "\r\n") != 0) { 1238 warnx("Unexpected data following chunk-size"); 1239 goto cleanup_fetch_url; 1240 } 1241 DPRINTF("fetch_url: got chunk-size of " LLF "\n", 1242 (LLT)chunksize); 1243 if (chunksize == 0) { 1244 lastchunk = 1; 1245 goto chunkdone; 1246 } 1247 } 1248 /* transfer file or chunk */ 1249 while (1) { 1250 struct timeval then, now, td; 1251 off_t bufrem; 1252 1253 if (rate_get) 1254 (void)gettimeofday(&then, NULL); 1255 bufrem = rate_get ? rate_get : (off_t)bufsize; 1256 if (ischunked) 1257 bufrem = MIN(chunksize, bufrem); 1258 while (bufrem > 0) { 1259 flen = fetch_read(xferbuf, sizeof(char), 1260 MIN((off_t)bufsize, bufrem), fin); 1261 if (flen <= 0) 1262 goto chunkdone; 1263 bytes += flen; 1264 bufrem -= flen; 1265 if (fwrite(xferbuf, sizeof(char), flen, fout) 1266 != flen) { 1267 warn("Writing `%s'", savefile); 1268 goto cleanup_fetch_url; 1269 } 1270 if (hash && !progress) { 1271 while (bytes >= hashbytes) { 1272 (void)putc('#', ttyout); 1273 hashbytes += mark; 1274 } 1275 (void)fflush(ttyout); 1276 } 1277 if (ischunked) { 1278 chunksize -= flen; 1279 if (chunksize <= 0) 1280 break; 1281 } 1282 } 1283 if (rate_get) { 1284 while (1) { 1285 (void)gettimeofday(&now, NULL); 1286 timersub(&now, &then, &td); 1287 if (td.tv_sec > 0) 1288 break; 1289 usleep(1000000 - td.tv_usec); 1290 } 1291 } 1292 if (ischunked && chunksize <= 0) 1293 break; 1294 } 1295 /* read CRLF after chunk*/ 1296 chunkdone: 1297 if (ischunked) { 1298 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1299 warnx("Unexpected EOF reading chunk CRLF"); 1300 goto cleanup_fetch_url; 1301 } 1302 if (strcmp(xferbuf, "\r\n") != 0) { 1303 warnx("Unexpected data following chunk"); 1304 goto cleanup_fetch_url; 1305 } 1306 if (lastchunk) 1307 break; 1308 } 1309 } while (ischunked); 1310 1311 /* XXX: deal with optional trailer & CRLF here? */ 1312 1313 if (hash && !progress && bytes > 0) { 1314 if (bytes < mark) 1315 (void)putc('#', ttyout); 1316 (void)putc('\n', ttyout); 1317 } 1318 if (fetch_error(fin)) { 1319 warn("Reading file"); 1320 goto cleanup_fetch_url; 1321 } 1322 progressmeter(1); 1323 (void)fflush(fout); 1324 if (closefunc == fclose && mtime != -1) { 1325 #ifdef __minix 1326 struct utimbuf utb; 1327 #endif /* __minix */ 1328 1329 struct timeval tval[2]; 1330 1331 (void)gettimeofday(&tval[0], NULL); 1332 1333 #ifdef __minix 1334 utb.actime = tval[0].tv_sec; 1335 utb.modtime = mtime; 1336 #else /* !__minix */ 1337 tval[1].tv_sec = mtime; 1338 tval[1].tv_usec = 0; 1339 #endif /* !__minix */ 1340 1341 (*closefunc)(fout); 1342 fout = NULL; 1343 1344 #ifdef __minix 1345 if (utime(savefile, &utb) == -1) { 1346 fprintf(ttyout, 1347 "Can't change modification time to %s", 1348 rfc2822time(localtime(&mtime))); 1349 } 1350 #else /* !__minix */ 1351 if (utimes(savefile, tval) == -1) { 1352 fprintf(ttyout, 1353 "Can't change modification time to %s", 1354 rfc2822time(localtime(&mtime))); 1355 } 1356 #endif /* !__minix */ 1357 1358 } 1359 if (bytes > 0) 1360 ptransfer(0); 1361 bytes = 0; 1362 1363 rval = 0; 1364 goto cleanup_fetch_url; 1365 1366 improper: 1367 warnx("Improper response from `%s:%s'", host, port); 1368 1369 cleanup_fetch_url: 1370 if (oldintr) 1371 (void)xsignal(SIGINT, oldintr); 1372 if (oldintp) 1373 (void)xsignal(SIGPIPE, oldintp); 1374 if (fin != NULL) 1375 fetch_close(fin); 1376 else if (s != -1) 1377 close(s); 1378 if (closefunc != NULL && fout != NULL) 1379 (*closefunc)(fout); 1380 if (res0) 1381 freeaddrinfo(res0); 1382 FREEPTR(savefile); 1383 FREEPTR(uuser); 1384 if (pass != NULL) 1385 memset(pass, 0, strlen(pass)); 1386 FREEPTR(pass); 1387 FREEPTR(host); 1388 FREEPTR(port); 1389 FREEPTR(path); 1390 FREEPTR(decodedpath); 1391 FREEPTR(puser); 1392 if (ppass != NULL) 1393 memset(ppass, 0, strlen(ppass)); 1394 FREEPTR(ppass); 1395 FREEPTR(auth); 1396 FREEPTR(location); 1397 FREEPTR(message); 1398 return (rval); 1399 } 1400 1401 /* 1402 * Abort a HTTP retrieval 1403 */ 1404 static void 1405 aborthttp(int notused) 1406 { 1407 char msgbuf[100]; 1408 size_t len; 1409 1410 sigint_raised = 1; 1411 alarmtimer(0); 1412 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1413 write(fileno(ttyout), msgbuf, len); 1414 siglongjmp(httpabort, 1); 1415 } 1416 1417 /* 1418 * Retrieve ftp URL or classic ftp argument using FTP. 1419 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1420 * is still open (e.g, ftp xfer with trailing /) 1421 */ 1422 static int 1423 fetch_ftp(const char *url) 1424 { 1425 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1426 char *host, *path, *dir, *file, *uuser, *pass; 1427 char *port; 1428 char cmdbuf[MAXPATHLEN]; 1429 char dirbuf[4]; 1430 int dirhasglob, filehasglob, rval, transtype, xargc; 1431 int oanonftp, oautologin; 1432 in_port_t portnum; 1433 url_t urltype; 1434 1435 DPRINTF("fetch_ftp: `%s'\n", url); 1436 host = path = dir = file = uuser = pass = NULL; 1437 port = NULL; 1438 rval = 1; 1439 transtype = TYPE_I; 1440 1441 if (STRNEQUAL(url, FTP_URL)) { 1442 if ((parse_url(url, "URL", &urltype, &uuser, &pass, 1443 &host, &port, &portnum, &path) == -1) || 1444 (uuser != NULL && *uuser == '\0') || 1445 EMPTYSTRING(host)) { 1446 warnx("Invalid URL `%s'", url); 1447 goto cleanup_fetch_ftp; 1448 } 1449 /* 1450 * Note: Don't url_decode(path) here. We need to keep the 1451 * distinction between "/" and "%2F" until later. 1452 */ 1453 1454 /* check for trailing ';type=[aid]' */ 1455 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1456 if (strcasecmp(cp, ";type=a") == 0) 1457 transtype = TYPE_A; 1458 else if (strcasecmp(cp, ";type=i") == 0) 1459 transtype = TYPE_I; 1460 else if (strcasecmp(cp, ";type=d") == 0) { 1461 warnx( 1462 "Directory listing via a URL is not supported"); 1463 goto cleanup_fetch_ftp; 1464 } else { 1465 warnx("Invalid suffix `%s' in URL `%s'", cp, 1466 url); 1467 goto cleanup_fetch_ftp; 1468 } 1469 *cp = 0; 1470 } 1471 } else { /* classic style `[user@]host:[file]' */ 1472 urltype = CLASSIC_URL_T; 1473 host = ftp_strdup(url); 1474 cp = strchr(host, '@'); 1475 if (cp != NULL) { 1476 *cp = '\0'; 1477 uuser = host; 1478 anonftp = 0; /* disable anonftp */ 1479 host = ftp_strdup(cp + 1); 1480 } 1481 cp = strchr(host, ':'); 1482 if (cp != NULL) { 1483 *cp = '\0'; 1484 path = ftp_strdup(cp + 1); 1485 } 1486 } 1487 if (EMPTYSTRING(host)) 1488 goto cleanup_fetch_ftp; 1489 1490 /* Extract the file and (if present) directory name. */ 1491 dir = path; 1492 if (! EMPTYSTRING(dir)) { 1493 /* 1494 * If we are dealing with classic `[user@]host:[path]' syntax, 1495 * then a path of the form `/file' (resulting from input of the 1496 * form `host:/file') means that we should do "CWD /" before 1497 * retrieving the file. So we set dir="/" and file="file". 1498 * 1499 * But if we are dealing with URLs like `ftp://host/path' then 1500 * a path of the form `/file' (resulting from a URL of the form 1501 * `ftp://host//file') means that we should do `CWD ' (with an 1502 * empty argument) before retrieving the file. So we set 1503 * dir="" and file="file". 1504 * 1505 * If the path does not contain / at all, we set dir=NULL. 1506 * (We get a path without any slashes if we are dealing with 1507 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1508 * 1509 * In all other cases, we set dir to a string that does not 1510 * include the final '/' that separates the dir part from the 1511 * file part of the path. (This will be the empty string if 1512 * and only if we are dealing with a path of the form `/file' 1513 * resulting from an URL of the form `ftp://host//file'.) 1514 */ 1515 cp = strrchr(dir, '/'); 1516 if (cp == dir && urltype == CLASSIC_URL_T) { 1517 file = cp + 1; 1518 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1519 dir = dirbuf; 1520 } else if (cp != NULL) { 1521 *cp++ = '\0'; 1522 file = cp; 1523 } else { 1524 file = dir; 1525 dir = NULL; 1526 } 1527 } else 1528 dir = NULL; 1529 if (urltype == FTP_URL_T && file != NULL) { 1530 url_decode(file); 1531 /* but still don't url_decode(dir) */ 1532 } 1533 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1534 "path `%s' dir `%s' file `%s'\n", 1535 STRorNULL(uuser), STRorNULL(pass), 1536 STRorNULL(host), STRorNULL(port), 1537 STRorNULL(path), STRorNULL(dir), STRorNULL(file)); 1538 1539 dirhasglob = filehasglob = 0; 1540 if (doglob && urltype == CLASSIC_URL_T) { 1541 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1542 dirhasglob = 1; 1543 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1544 filehasglob = 1; 1545 } 1546 1547 /* Set up the connection */ 1548 oanonftp = anonftp; 1549 if (connected) 1550 disconnect(0, NULL); 1551 anonftp = oanonftp; 1552 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1553 xargv[0] = cmdbuf; 1554 xargv[1] = host; 1555 xargv[2] = NULL; 1556 xargc = 2; 1557 if (port) { 1558 xargv[2] = port; 1559 xargv[3] = NULL; 1560 xargc = 3; 1561 } 1562 oautologin = autologin; 1563 /* don't autologin in setpeer(), use ftp_login() below */ 1564 autologin = 0; 1565 setpeer(xargc, xargv); 1566 autologin = oautologin; 1567 if ((connected == 0) || 1568 (connected == 1 && !ftp_login(host, uuser, pass))) { 1569 warnx("Can't connect or login to host `%s:%s'", 1570 host, port ? port : "?"); 1571 goto cleanup_fetch_ftp; 1572 } 1573 1574 switch (transtype) { 1575 case TYPE_A: 1576 setascii(1, xargv); 1577 break; 1578 case TYPE_I: 1579 setbinary(1, xargv); 1580 break; 1581 default: 1582 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1583 } 1584 1585 /* 1586 * Change directories, if necessary. 1587 * 1588 * Note: don't use EMPTYSTRING(dir) below, because 1589 * dir=="" means something different from dir==NULL. 1590 */ 1591 if (dir != NULL && !dirhasglob) { 1592 char *nextpart; 1593 1594 /* 1595 * If we are dealing with a classic `[user@]host:[path]' 1596 * (urltype is CLASSIC_URL_T) then we have a raw directory 1597 * name (not encoded in any way) and we can change 1598 * directories in one step. 1599 * 1600 * If we are dealing with an `ftp://host/path' URL 1601 * (urltype is FTP_URL_T), then RFC 3986 says we need to 1602 * send a separate CWD command for each unescaped "/" 1603 * in the path, and we have to interpret %hex escaping 1604 * *after* we find the slashes. It's possible to get 1605 * empty components here, (from multiple adjacent 1606 * slashes in the path) and RFC 3986 says that we should 1607 * still do `CWD ' (with a null argument) in such cases. 1608 * 1609 * Many ftp servers don't support `CWD ', so if there's an 1610 * error performing that command, bail out with a descriptive 1611 * message. 1612 * 1613 * Examples: 1614 * 1615 * host: dir="", urltype=CLASSIC_URL_T 1616 * logged in (to default directory) 1617 * host:file dir=NULL, urltype=CLASSIC_URL_T 1618 * "RETR file" 1619 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1620 * "CWD dir", logged in 1621 * ftp://host/ dir="", urltype=FTP_URL_T 1622 * logged in (to default directory) 1623 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1624 * "CWD dir", logged in 1625 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1626 * "RETR file" 1627 * ftp://host//file dir="", urltype=FTP_URL_T 1628 * "CWD ", "RETR file" 1629 * host:/file dir="/", urltype=CLASSIC_URL_T 1630 * "CWD /", "RETR file" 1631 * ftp://host///file dir="/", urltype=FTP_URL_T 1632 * "CWD ", "CWD ", "RETR file" 1633 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1634 * "CWD /", "RETR file" 1635 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1636 * "CWD foo", "RETR file" 1637 * ftp://host/foo/bar/file dir="foo/bar" 1638 * "CWD foo", "CWD bar", "RETR file" 1639 * ftp://host//foo/bar/file dir="/foo/bar" 1640 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1641 * ftp://host/foo//bar/file dir="foo//bar" 1642 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1643 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1644 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1645 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1646 * "CWD /foo", "CWD bar", "RETR file" 1647 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1648 * "CWD /foo/bar", "RETR file" 1649 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1650 * "RETR /foo/bar/file" 1651 * 1652 * Note that we don't need `dir' after this point. 1653 */ 1654 do { 1655 if (urltype == FTP_URL_T) { 1656 nextpart = strchr(dir, '/'); 1657 if (nextpart) { 1658 *nextpart = '\0'; 1659 nextpart++; 1660 } 1661 url_decode(dir); 1662 } else 1663 nextpart = NULL; 1664 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 1665 STRorNULL(dir), STRorNULL(nextpart)); 1666 if (urltype == FTP_URL_T || *dir != '\0') { 1667 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 1668 xargv[0] = cmdbuf; 1669 xargv[1] = dir; 1670 xargv[2] = NULL; 1671 dirchange = 0; 1672 cd(2, xargv); 1673 if (! dirchange) { 1674 if (*dir == '\0' && code == 500) 1675 fprintf(stderr, 1676 "\n" 1677 "ftp: The `CWD ' command (without a directory), which is required by\n" 1678 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 1679 " conflicts with the server's conformance to RFC 959.\n" 1680 " Try the same URL without the `//' in the URL pathname.\n" 1681 "\n"); 1682 goto cleanup_fetch_ftp; 1683 } 1684 } 1685 dir = nextpart; 1686 } while (dir != NULL); 1687 } 1688 1689 if (EMPTYSTRING(file)) { 1690 rval = -1; 1691 goto cleanup_fetch_ftp; 1692 } 1693 1694 if (dirhasglob) { 1695 (void)strlcpy(rempath, dir, sizeof(rempath)); 1696 (void)strlcat(rempath, "/", sizeof(rempath)); 1697 (void)strlcat(rempath, file, sizeof(rempath)); 1698 file = rempath; 1699 } 1700 1701 /* Fetch the file(s). */ 1702 xargc = 2; 1703 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 1704 xargv[0] = cmdbuf; 1705 xargv[1] = file; 1706 xargv[2] = NULL; 1707 if (dirhasglob || filehasglob) { 1708 int ointeractive; 1709 1710 ointeractive = interactive; 1711 interactive = 0; 1712 if (restartautofetch) 1713 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 1714 else 1715 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 1716 xargv[0] = cmdbuf; 1717 mget(xargc, xargv); 1718 interactive = ointeractive; 1719 } else { 1720 if (outfile == NULL) { 1721 cp = strrchr(file, '/'); /* find savefile */ 1722 if (cp != NULL) 1723 outfile = cp + 1; 1724 else 1725 outfile = file; 1726 } 1727 xargv[2] = (char *)outfile; 1728 xargv[3] = NULL; 1729 xargc++; 1730 if (restartautofetch) 1731 reget(xargc, xargv); 1732 else 1733 get(xargc, xargv); 1734 } 1735 1736 if ((code / 100) == COMPLETE) 1737 rval = 0; 1738 1739 cleanup_fetch_ftp: 1740 FREEPTR(port); 1741 FREEPTR(host); 1742 FREEPTR(path); 1743 FREEPTR(uuser); 1744 if (pass) 1745 memset(pass, 0, strlen(pass)); 1746 FREEPTR(pass); 1747 return (rval); 1748 } 1749 1750 /* 1751 * Retrieve the given file to outfile. 1752 * Supports arguments of the form: 1753 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1754 * call fetch_ftp() 1755 * "http://host/path" call fetch_url() to use HTTP 1756 * "file:///path" call fetch_url() to copy 1757 * "about:..." print a message 1758 * 1759 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1760 * is still open (e.g, ftp xfer with trailing /) 1761 */ 1762 static int 1763 go_fetch(const char *url) 1764 { 1765 char *proxyenv; 1766 char *p; 1767 1768 #ifndef NO_ABOUT 1769 /* 1770 * Check for about:* 1771 */ 1772 if (STRNEQUAL(url, ABOUT_URL)) { 1773 url += sizeof(ABOUT_URL) -1; 1774 if (strcasecmp(url, "ftp") == 0 || 1775 strcasecmp(url, "tnftp") == 0) { 1776 fputs( 1777 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1778 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1779 } else if (strcasecmp(url, "lukem") == 0) { 1780 fputs( 1781 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1782 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1783 } else if (strcasecmp(url, "netbsd") == 0) { 1784 fputs( 1785 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1786 "For more information, see http://www.NetBSD.org/\n", ttyout); 1787 } else if (strcasecmp(url, "version") == 0) { 1788 fprintf(ttyout, "Version: %s %s%s\n", 1789 FTP_PRODUCT, FTP_VERSION, 1790 #ifdef INET6 1791 "" 1792 #else 1793 " (-IPv6)" 1794 #endif 1795 ); 1796 } else { 1797 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1798 } 1799 fputs("\n", ttyout); 1800 return (0); 1801 } 1802 #endif 1803 1804 /* 1805 * Check for file:// and http:// URLs. 1806 */ 1807 if (STRNEQUAL(url, HTTP_URL) 1808 #ifdef WITH_SSL 1809 || STRNEQUAL(url, HTTPS_URL) 1810 #endif 1811 || STRNEQUAL(url, FILE_URL)) 1812 return (fetch_url(url, NULL, NULL, NULL)); 1813 1814 /* 1815 * If it contains "://" but does not begin with ftp:// 1816 * or something that was already handled, then it's 1817 * unsupported. 1818 * 1819 * If it contains ":" but not "://" then we assume the 1820 * part before the colon is a host name, not an URL scheme, 1821 * so we don't try to match that here. 1822 */ 1823 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 1824 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 1825 1826 /* 1827 * Try FTP URL-style and host:file arguments next. 1828 * If ftpproxy is set with an FTP URL, use fetch_url() 1829 * Othewise, use fetch_ftp(). 1830 */ 1831 proxyenv = getoptionvalue("ftp_proxy"); 1832 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 1833 return (fetch_url(url, NULL, NULL, NULL)); 1834 1835 return (fetch_ftp(url)); 1836 } 1837 1838 /* 1839 * Retrieve multiple files from the command line, 1840 * calling go_fetch() for each file. 1841 * 1842 * If an ftp path has a trailing "/", the path will be cd-ed into and 1843 * the connection remains open, and the function will return -1 1844 * (to indicate the connection is alive). 1845 * If an error occurs the return value will be the offset+1 in 1846 * argv[] of the file that caused a problem (i.e, argv[x] 1847 * returns x+1) 1848 * Otherwise, 0 is returned if all files retrieved successfully. 1849 */ 1850 int 1851 auto_fetch(int argc, char *argv[]) 1852 { 1853 volatile int argpos, rval; 1854 1855 argpos = rval = 0; 1856 1857 if (sigsetjmp(toplevel, 1)) { 1858 if (connected) 1859 disconnect(0, NULL); 1860 if (rval > 0) 1861 rval = argpos + 1; 1862 return (rval); 1863 } 1864 (void)xsignal(SIGINT, intr); 1865 (void)xsignal(SIGPIPE, lostpeer); 1866 1867 /* 1868 * Loop through as long as there's files to fetch. 1869 */ 1870 for (; (rval == 0) && (argpos < argc); argpos++) { 1871 if (strchr(argv[argpos], ':') == NULL) 1872 break; 1873 redirect_loop = 0; 1874 if (!anonftp) 1875 anonftp = 2; /* Handle "automatic" transfers. */ 1876 rval = go_fetch(argv[argpos]); 1877 if (outfile != NULL && strcmp(outfile, "-") != 0 1878 && outfile[0] != '|') 1879 outfile = NULL; 1880 if (rval > 0) 1881 rval = argpos + 1; 1882 } 1883 1884 if (connected && rval != -1) 1885 disconnect(0, NULL); 1886 return (rval); 1887 } 1888 1889 1890 /* 1891 * Upload multiple files from the command line. 1892 * 1893 * If an error occurs the return value will be the offset+1 in 1894 * argv[] of the file that caused a problem (i.e, argv[x] 1895 * returns x+1) 1896 * Otherwise, 0 is returned if all files uploaded successfully. 1897 */ 1898 int 1899 auto_put(int argc, char **argv, const char *uploadserver) 1900 { 1901 char *uargv[4], *path, *pathsep; 1902 int uargc, rval, argpos; 1903 size_t len; 1904 char cmdbuf[MAX_C_NAME]; 1905 1906 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 1907 uargv[0] = cmdbuf; 1908 uargv[1] = argv[0]; 1909 uargc = 2; 1910 uargv[2] = uargv[3] = NULL; 1911 pathsep = NULL; 1912 rval = 1; 1913 1914 DPRINTF("auto_put: target `%s'\n", uploadserver); 1915 1916 path = ftp_strdup(uploadserver); 1917 len = strlen(path); 1918 if (path[len - 1] != '/' && path[len - 1] != ':') { 1919 /* 1920 * make sure we always pass a directory to auto_fetch 1921 */ 1922 if (argc > 1) { /* more than one file to upload */ 1923 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1924 free(path); 1925 path = (char *)ftp_malloc(len); 1926 (void)strlcpy(path, uploadserver, len); 1927 (void)strlcat(path, "/", len); 1928 } else { /* single file to upload */ 1929 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 1930 uargv[0] = cmdbuf; 1931 pathsep = strrchr(path, '/'); 1932 if (pathsep == NULL) { 1933 pathsep = strrchr(path, ':'); 1934 if (pathsep == NULL) { 1935 warnx("Invalid URL `%s'", path); 1936 goto cleanup_auto_put; 1937 } 1938 pathsep++; 1939 uargv[2] = ftp_strdup(pathsep); 1940 pathsep[0] = '/'; 1941 } else 1942 uargv[2] = ftp_strdup(pathsep + 1); 1943 pathsep[1] = '\0'; 1944 uargc++; 1945 } 1946 } 1947 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 1948 path, STRorNULL(uargv[2])); 1949 1950 /* connect and cwd */ 1951 rval = auto_fetch(1, &path); 1952 if(rval >= 0) 1953 goto cleanup_auto_put; 1954 1955 rval = 0; 1956 1957 /* target filename provided; upload 1 file */ 1958 /* XXX : is this the best way? */ 1959 if (uargc == 3) { 1960 uargv[1] = argv[0]; 1961 put(uargc, uargv); 1962 if ((code / 100) != COMPLETE) 1963 rval = 1; 1964 } else { /* otherwise a target dir: upload all files to it */ 1965 for(argpos = 0; argv[argpos] != NULL; argpos++) { 1966 uargv[1] = argv[argpos]; 1967 mput(uargc, uargv); 1968 if ((code / 100) != COMPLETE) { 1969 rval = argpos + 1; 1970 break; 1971 } 1972 } 1973 } 1974 1975 cleanup_auto_put: 1976 free(path); 1977 FREEPTR(uargv[2]); 1978 return (rval); 1979 } 1980