1 /* $NetBSD: fetch.c,v 1.205 2013/11/07 02:06:51 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 1.205 2013/11/07 02:06:51 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 #include "ssl.h" 68 #include "ftp_var.h" 69 #include "version.h" 70 71 typedef enum { 72 UNKNOWN_URL_T=-1, 73 HTTP_URL_T, 74 #ifdef WITH_SSL 75 HTTPS_URL_T, 76 #endif 77 FTP_URL_T, 78 FILE_URL_T, 79 CLASSIC_URL_T 80 } url_t; 81 82 __dead static void aborthttp(int); 83 __dead static void timeouthttp(int); 84 #ifndef NO_AUTH 85 static int auth_url(const char *, char **, const char *, const char *); 86 static void base64_encode(const unsigned char *, size_t, unsigned char *); 87 #endif 88 static int go_fetch(const char *); 89 static int fetch_ftp(const char *); 90 static int fetch_url(const char *, const char *, char *, char *); 91 static const char *match_token(const char **, const char *); 92 static int parse_url(const char *, const char *, url_t *, char **, 93 char **, char **, char **, in_port_t *, char **); 94 static void url_decode(char *); 95 96 static int redirect_loop; 97 98 99 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0) 100 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t') 101 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0) 102 103 104 #define ABOUT_URL "about:" /* propaganda */ 105 #define FILE_URL "file://" /* file URL prefix */ 106 #define FTP_URL "ftp://" /* ftp URL prefix */ 107 #define HTTP_URL "http://" /* http URL prefix */ 108 #ifdef WITH_SSL 109 #define HTTPS_URL "https://" /* https URL prefix */ 110 111 #define IS_HTTP_TYPE(urltype) \ 112 (((urltype) == HTTP_URL_T) || ((urltype) == HTTPS_URL_T)) 113 #else 114 #define IS_HTTP_TYPE(urltype) \ 115 ((urltype) == HTTP_URL_T) 116 #endif 117 118 /* 119 * Determine if token is the next word in buf (case insensitive). 120 * If so, advance buf past the token and any trailing LWS, and 121 * return a pointer to the token (in buf). Otherwise, return NULL. 122 * token may be preceded by LWS. 123 * token must be followed by LWS or NUL. (I.e, don't partial match). 124 */ 125 static const char * 126 match_token(const char **buf, const char *token) 127 { 128 const char *p, *orig; 129 size_t tlen; 130 131 tlen = strlen(token); 132 p = *buf; 133 SKIPLWS(p); 134 orig = p; 135 if (strncasecmp(p, token, tlen) != 0) 136 return NULL; 137 p += tlen; 138 if (*p != '\0' && !ISLWS(*p)) 139 return NULL; 140 SKIPLWS(p); 141 orig = *buf; 142 *buf = p; 143 return orig; 144 } 145 146 #ifndef NO_AUTH 147 /* 148 * Generate authorization response based on given authentication challenge. 149 * Returns -1 if an error occurred, otherwise 0. 150 * Sets response to a malloc(3)ed string; caller should free. 151 */ 152 static int 153 auth_url(const char *challenge, char **response, const char *guser, 154 const char *gpass) 155 { 156 const char *cp, *scheme, *errormsg; 157 char *ep, *clear, *realm; 158 char uuser[BUFSIZ], *gotpass; 159 const char *upass; 160 int rval; 161 size_t len, clen, rlen; 162 163 *response = NULL; 164 clear = realm = NULL; 165 rval = -1; 166 cp = challenge; 167 scheme = "Basic"; /* only support Basic authentication */ 168 gotpass = NULL; 169 170 DPRINTF("auth_url: challenge `%s'\n", challenge); 171 172 if (! match_token(&cp, scheme)) { 173 warnx("Unsupported authentication challenge `%s'", 174 challenge); 175 goto cleanup_auth_url; 176 } 177 178 #define REALM "realm=\"" 179 if (STRNEQUAL(cp, REALM)) 180 cp += sizeof(REALM) - 1; 181 else { 182 warnx("Unsupported authentication challenge `%s'", 183 challenge); 184 goto cleanup_auth_url; 185 } 186 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 187 if ((ep = strchr(cp, '\"')) != NULL) { 188 len = ep - cp; 189 realm = (char *)ftp_malloc(len + 1); 190 (void)strlcpy(realm, cp, len + 1); 191 } else { 192 warnx("Unsupported authentication challenge `%s'", 193 challenge); 194 goto cleanup_auth_url; 195 } 196 197 fprintf(ttyout, "Username for `%s': ", realm); 198 if (guser != NULL) { 199 (void)strlcpy(uuser, guser, sizeof(uuser)); 200 fprintf(ttyout, "%s\n", uuser); 201 } else { 202 (void)fflush(ttyout); 203 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) { 204 warnx("%s; can't authenticate", errormsg); 205 goto cleanup_auth_url; 206 } 207 } 208 if (gpass != NULL) 209 upass = gpass; 210 else { 211 gotpass = getpass("Password: "); 212 if (gotpass == NULL) { 213 warnx("Can't read password"); 214 goto cleanup_auth_url; 215 } 216 upass = gotpass; 217 } 218 219 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */ 220 clear = (char *)ftp_malloc(clen); 221 (void)strlcpy(clear, uuser, clen); 222 (void)strlcat(clear, ":", clen); 223 (void)strlcat(clear, upass, clen); 224 if (gotpass) 225 memset(gotpass, 0, strlen(gotpass)); 226 227 /* scheme + " " + enc + "\0" */ 228 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 229 *response = (char *)ftp_malloc(rlen); 230 (void)strlcpy(*response, scheme, rlen); 231 len = strlcat(*response, " ", rlen); 232 /* use `clen - 1' to not encode the trailing NUL */ 233 base64_encode((unsigned char *)clear, clen - 1, 234 (unsigned char *)*response + len); 235 memset(clear, 0, clen); 236 rval = 0; 237 238 cleanup_auth_url: 239 FREEPTR(clear); 240 FREEPTR(realm); 241 return (rval); 242 } 243 244 /* 245 * Encode len bytes starting at clear using base64 encoding into encoded, 246 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 247 */ 248 static void 249 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 250 { 251 static const unsigned char enc[] = 252 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 253 unsigned char *cp; 254 size_t i; 255 256 cp = encoded; 257 for (i = 0; i < len; i += 3) { 258 *(cp++) = enc[((clear[i + 0] >> 2))]; 259 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 260 | ((clear[i + 1] >> 4) & 0x0f)]; 261 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 262 | ((clear[i + 2] >> 6) & 0x03)]; 263 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 264 } 265 *cp = '\0'; 266 while (i-- > len) 267 *(--cp) = '='; 268 } 269 #endif 270 271 /* 272 * Decode %xx escapes in given string, `in-place'. 273 */ 274 static void 275 url_decode(char *url) 276 { 277 unsigned char *p, *q; 278 279 if (EMPTYSTRING(url)) 280 return; 281 p = q = (unsigned char *)url; 282 283 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 284 while (*p) { 285 if (p[0] == '%' 286 && p[1] && isxdigit((unsigned char)p[1]) 287 && p[2] && isxdigit((unsigned char)p[2])) { 288 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 289 p+=3; 290 } else 291 *q++ = *p++; 292 } 293 *q = '\0'; 294 } 295 296 297 /* 298 * Parse URL of form (per RFC 3986): 299 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 300 * Returns -1 if a parse error occurred, otherwise 0. 301 * It's the caller's responsibility to url_decode() the returned 302 * user, pass and path. 303 * 304 * Sets type to url_t, each of the given char ** pointers to a 305 * malloc(3)ed strings of the relevant section, and port to 306 * the number given, or ftpport if ftp://, or httpport if http://. 307 * 308 * XXX: this is not totally RFC 3986 compliant; <path> will have the 309 * leading `/' unless it's an ftp:// URL, as this makes things easier 310 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 311 * host and the URL-path removed, but any additional leading slashes 312 * in the URL-path are retained (because they imply that we should 313 * later do "CWD" with a null argument). 314 * 315 * Examples: 316 * input URL output path 317 * --------- ----------- 318 * "http://host" "/" 319 * "http://host/" "/" 320 * "http://host/path" "/path" 321 * "file://host/dir/file" "dir/file" 322 * "ftp://host" "" 323 * "ftp://host/" "" 324 * "ftp://host//" "/" 325 * "ftp://host/dir/file" "dir/file" 326 * "ftp://host//dir/file" "/dir/file" 327 */ 328 static int 329 parse_url(const char *url, const char *desc, url_t *utype, 330 char **uuser, char **pass, char **host, char **port, 331 in_port_t *portnum, char **path) 332 { 333 const char *origurl, *tport; 334 char *cp, *ep, *thost; 335 size_t len; 336 337 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL 338 || pass == NULL || host == NULL || port == NULL || portnum == NULL 339 || path == NULL) 340 errx(1, "parse_url: invoked with NULL argument!"); 341 DPRINTF("parse_url: %s `%s'\n", desc, url); 342 343 origurl = url; 344 *utype = UNKNOWN_URL_T; 345 *uuser = *pass = *host = *port = *path = NULL; 346 *portnum = 0; 347 tport = NULL; 348 349 if (STRNEQUAL(url, HTTP_URL)) { 350 url += sizeof(HTTP_URL) - 1; 351 *utype = HTTP_URL_T; 352 *portnum = HTTP_PORT; 353 tport = httpport; 354 } else if (STRNEQUAL(url, FTP_URL)) { 355 url += sizeof(FTP_URL) - 1; 356 *utype = FTP_URL_T; 357 *portnum = FTP_PORT; 358 tport = ftpport; 359 } else if (STRNEQUAL(url, FILE_URL)) { 360 url += sizeof(FILE_URL) - 1; 361 *utype = FILE_URL_T; 362 #ifdef WITH_SSL 363 } else if (STRNEQUAL(url, HTTPS_URL)) { 364 url += sizeof(HTTPS_URL) - 1; 365 *utype = HTTPS_URL_T; 366 *portnum = HTTPS_PORT; 367 tport = httpsport; 368 #endif 369 } else { 370 warnx("Invalid %s `%s'", desc, url); 371 cleanup_parse_url: 372 FREEPTR(*uuser); 373 if (*pass != NULL) 374 memset(*pass, 0, strlen(*pass)); 375 FREEPTR(*pass); 376 FREEPTR(*host); 377 FREEPTR(*port); 378 FREEPTR(*path); 379 return (-1); 380 } 381 382 if (*url == '\0') 383 return (0); 384 385 /* find [user[:pass]@]host[:port] */ 386 ep = strchr(url, '/'); 387 if (ep == NULL) 388 thost = ftp_strdup(url); 389 else { 390 len = ep - url; 391 thost = (char *)ftp_malloc(len + 1); 392 (void)strlcpy(thost, url, len + 1); 393 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */ 394 ep++; 395 *path = ftp_strdup(ep); 396 } 397 398 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 399 if (cp != NULL) { 400 if (*utype == FTP_URL_T) 401 anonftp = 0; /* disable anonftp */ 402 *uuser = thost; 403 *cp = '\0'; 404 thost = ftp_strdup(cp + 1); 405 cp = strchr(*uuser, ':'); 406 if (cp != NULL) { 407 *cp = '\0'; 408 *pass = ftp_strdup(cp + 1); 409 } 410 url_decode(*uuser); 411 if (*pass) 412 url_decode(*pass); 413 } 414 415 #ifdef INET6 416 /* 417 * Check if thost is an encoded IPv6 address, as per 418 * RFC 3986: 419 * `[' ipv6-address ']' 420 */ 421 if (*thost == '[') { 422 cp = thost + 1; 423 if ((ep = strchr(cp, ']')) == NULL || 424 (ep[1] != '\0' && ep[1] != ':')) { 425 warnx("Invalid address `%s' in %s `%s'", 426 thost, desc, origurl); 427 goto cleanup_parse_url; 428 } 429 len = ep - cp; /* change `[xyz]' -> `xyz' */ 430 memmove(thost, thost + 1, len); 431 thost[len] = '\0'; 432 if (! isipv6addr(thost)) { 433 warnx("Invalid IPv6 address `%s' in %s `%s'", 434 thost, desc, origurl); 435 goto cleanup_parse_url; 436 } 437 cp = ep + 1; 438 if (*cp == ':') 439 cp++; 440 else 441 cp = NULL; 442 } else 443 #endif /* INET6 */ 444 if ((cp = strchr(thost, ':')) != NULL) 445 *cp++ = '\0'; 446 *host = thost; 447 448 /* look for [:port] */ 449 if (cp != NULL) { 450 unsigned long nport; 451 452 nport = strtoul(cp, &ep, 10); 453 if (*cp == '\0' || *ep != '\0' || 454 nport < 1 || nport > MAX_IN_PORT_T) { 455 warnx("Unknown port `%s' in %s `%s'", 456 cp, desc, origurl); 457 goto cleanup_parse_url; 458 } 459 *portnum = nport; 460 tport = cp; 461 } 462 463 if (tport != NULL) 464 *port = ftp_strdup(tport); 465 if (*path == NULL) { 466 const char *emptypath = "/"; 467 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */ 468 emptypath++; 469 *path = ftp_strdup(emptypath); 470 } 471 472 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 473 "path `%s'\n", 474 STRorNULL(*uuser), STRorNULL(*pass), 475 STRorNULL(*host), STRorNULL(*port), 476 *portnum ? *portnum : -1, STRorNULL(*path)); 477 478 return (0); 479 } 480 481 sigjmp_buf httpabort; 482 483 /* 484 * Retrieve URL, via a proxy if necessary, using HTTP. 485 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 486 * http_proxy/https_proxy as appropriate. 487 * Supports HTTP redirects. 488 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 489 * is still open (e.g, ftp xfer with trailing /) 490 */ 491 static int 492 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 493 { 494 struct addrinfo hints, *res, *res0 = NULL; 495 int error; 496 sigfunc volatile oldint; 497 sigfunc volatile oldpipe; 498 sigfunc volatile oldalrm; 499 sigfunc volatile oldquit; 500 int volatile s; 501 struct stat sb; 502 int volatile ischunked; 503 int volatile isproxy; 504 int volatile rval; 505 int volatile hcode; 506 int len; 507 size_t flen; 508 static size_t bufsize; 509 static char *xferbuf; 510 const char *cp, *token; 511 char *ep; 512 char buf[FTPBUFLEN]; 513 const char *errormsg; 514 char *volatile savefile; 515 char *volatile auth; 516 char *volatile location; 517 char *volatile message; 518 char *uuser, *pass, *host, *port, *path; 519 char *volatile decodedpath; 520 char *puser, *ppass, *useragent; 521 off_t hashbytes, rangestart, rangeend, entitylen; 522 int (*volatile closefunc)(FILE *); 523 FETCH *volatile fin; 524 FILE *volatile fout; 525 const char *volatile penv = proxyenv; 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("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 534 535 oldquit = oldalrm = oldint = oldpipe = 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 (sigsetjmp(httpabort, 1)) 547 goto cleanup_fetch_url; 548 549 if (parse_url(url, "URL", &urltype, &uuser, &pass, &host, &port, 550 &portnum, &path) == -1) 551 goto cleanup_fetch_url; 552 553 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 554 && strcasecmp(host, "localhost") != 0) { 555 warnx("No support for non local file URL `%s'", url); 556 goto cleanup_fetch_url; 557 } 558 559 if (EMPTYSTRING(path)) { 560 if (urltype == FTP_URL_T) { 561 rval = fetch_ftp(url); 562 goto cleanup_fetch_url; 563 } 564 if (!IS_HTTP_TYPE(urltype) || outfile == NULL) { 565 warnx("Invalid URL (no file after host) `%s'", url); 566 goto cleanup_fetch_url; 567 } 568 } 569 570 decodedpath = ftp_strdup(path); 571 url_decode(decodedpath); 572 573 if (outfile) 574 savefile = ftp_strdup(outfile); 575 else { 576 cp = strrchr(decodedpath, '/'); /* find savefile */ 577 if (cp != NULL) 578 savefile = ftp_strdup(cp + 1); 579 else 580 savefile = ftp_strdup(decodedpath); 581 } 582 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 583 if (EMPTYSTRING(savefile)) { 584 if (urltype == FTP_URL_T) { 585 rval = fetch_ftp(url); 586 goto cleanup_fetch_url; 587 } 588 warnx("No file after directory (you must specify an " 589 "output file) `%s'", url); 590 goto cleanup_fetch_url; 591 } 592 593 restart_point = 0; 594 filesize = -1; 595 rangestart = rangeend = entitylen = -1; 596 mtime = -1; 597 if (restartautofetch) { 598 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 599 stat(savefile, &sb) == 0) 600 restart_point = sb.st_size; 601 } 602 if (urltype == FILE_URL_T) { /* file:// URLs */ 603 direction = "copied"; 604 fin = fetch_open(decodedpath, "r"); 605 if (fin == NULL) { 606 warn("Can't open `%s'", decodedpath); 607 goto cleanup_fetch_url; 608 } 609 if (fstat(fetch_fileno(fin), &sb) == 0) { 610 mtime = sb.st_mtime; 611 filesize = sb.st_size; 612 } 613 if (restart_point) { 614 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 615 warn("Can't seek to restart `%s'", 616 decodedpath); 617 goto cleanup_fetch_url; 618 } 619 } 620 if (verbose) { 621 fprintf(ttyout, "Copying %s", decodedpath); 622 if (restart_point) 623 fprintf(ttyout, " (restarting at " LLF ")", 624 (LLT)restart_point); 625 fputs("\n", ttyout); 626 } 627 if (0 == rcvbuf_size) { 628 rcvbuf_size = 8 * 1024; /* XXX */ 629 } 630 } else { /* ftp:// or http:// URLs */ 631 const char *leading; 632 int hasleading; 633 634 if (penv == NULL) { 635 #ifdef WITH_SSL 636 if (urltype == HTTPS_URL_T) 637 penv = getoptionvalue("https_proxy"); 638 #endif 639 if (penv == NULL && IS_HTTP_TYPE(urltype)) 640 penv = getoptionvalue("http_proxy"); 641 else if (urltype == FTP_URL_T) 642 penv = getoptionvalue("ftp_proxy"); 643 } 644 direction = "retrieved"; 645 if (! EMPTYSTRING(penv)) { /* use proxy */ 646 url_t purltype; 647 char *phost, *ppath; 648 char *pport, *no_proxy; 649 in_port_t pportnum; 650 651 isproxy = 1; 652 653 /* check URL against list of no_proxied sites */ 654 no_proxy = getoptionvalue("no_proxy"); 655 if (! EMPTYSTRING(no_proxy)) { 656 char *np, *np_copy, *np_iter; 657 unsigned long np_port; 658 size_t hlen, plen; 659 660 np_iter = np_copy = ftp_strdup(no_proxy); 661 hlen = strlen(host); 662 while ((cp = strsep(&np_iter, " ,")) != NULL) { 663 if (*cp == '\0') 664 continue; 665 if ((np = strrchr(cp, ':')) != NULL) { 666 *np++ = '\0'; 667 np_port = strtoul(np, &ep, 10); 668 if (*np == '\0' || *ep != '\0') 669 continue; 670 if (np_port != portnum) 671 continue; 672 } 673 plen = strlen(cp); 674 if (hlen < plen) 675 continue; 676 if (strncasecmp(host + hlen - plen, 677 cp, plen) == 0) { 678 isproxy = 0; 679 break; 680 } 681 } 682 FREEPTR(np_copy); 683 if (isproxy == 0 && urltype == FTP_URL_T) { 684 rval = fetch_ftp(url); 685 goto cleanup_fetch_url; 686 } 687 } 688 689 if (isproxy) { 690 if (restart_point) { 691 warnx("Can't restart via proxy URL `%s'", 692 penv); 693 goto cleanup_fetch_url; 694 } 695 if (parse_url(penv, "proxy URL", &purltype, 696 &puser, &ppass, &phost, &pport, &pportnum, 697 &ppath) == -1) 698 goto cleanup_fetch_url; 699 700 if ((!IS_HTTP_TYPE(purltype) 701 && purltype != FTP_URL_T) || 702 EMPTYSTRING(phost) || 703 (! EMPTYSTRING(ppath) 704 && strcmp(ppath, "/") != 0)) { 705 warnx("Malformed proxy URL `%s'", penv); 706 FREEPTR(phost); 707 FREEPTR(pport); 708 FREEPTR(ppath); 709 goto cleanup_fetch_url; 710 } 711 if (isipv6addr(host) && 712 strchr(host, '%') != NULL) { 713 warnx( 714 "Scoped address notation `%s' disallowed via web proxy", 715 host); 716 FREEPTR(phost); 717 FREEPTR(pport); 718 FREEPTR(ppath); 719 goto cleanup_fetch_url; 720 } 721 722 FREEPTR(host); 723 host = phost; 724 FREEPTR(port); 725 port = pport; 726 FREEPTR(path); 727 path = ftp_strdup(url); 728 FREEPTR(ppath); 729 urltype = purltype; 730 } 731 } /* ! EMPTYSTRING(penv) */ 732 733 memset(&hints, 0, sizeof(hints)); 734 hints.ai_flags = 0; 735 hints.ai_family = family; 736 hints.ai_socktype = SOCK_STREAM; 737 hints.ai_protocol = 0; 738 error = getaddrinfo(host, port, &hints, &res0); 739 if (error) { 740 warnx("Can't LOOKUP `%s:%s': %s", host, port, 741 (error == EAI_SYSTEM) ? strerror(errno) 742 : gai_strerror(error)); 743 goto cleanup_fetch_url; 744 } 745 if (res0->ai_canonname) 746 host = res0->ai_canonname; 747 748 s = -1; 749 #ifdef WITH_SSL 750 ssl = NULL; 751 #endif 752 for (res = res0; res; res = res->ai_next) { 753 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 754 755 ai_unmapped(res); 756 if (getnameinfo(res->ai_addr, res->ai_addrlen, 757 hname, sizeof(hname), sname, sizeof(sname), 758 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 759 strlcpy(hname, "?", sizeof(hname)); 760 strlcpy(sname, "?", sizeof(sname)); 761 } 762 763 if (verbose && res0->ai_next) { 764 fprintf(ttyout, "Trying %s:%s ...\n", 765 hname, sname); 766 } 767 768 s = socket(res->ai_family, SOCK_STREAM, 769 res->ai_protocol); 770 if (s < 0) { 771 warn( 772 "Can't create socket for connection to " 773 "`%s:%s'", hname, sname); 774 continue; 775 } 776 777 if (ftp_connect(s, res->ai_addr, res->ai_addrlen, 778 verbose || !res->ai_next) < 0) { 779 close(s); 780 s = -1; 781 continue; 782 } 783 784 #ifdef WITH_SSL 785 if (urltype == HTTPS_URL_T) { 786 if ((ssl = fetch_start_ssl(s)) == NULL) { 787 close(s); 788 s = -1; 789 continue; 790 } 791 } 792 #endif 793 794 /* success */ 795 break; 796 } 797 798 if (s < 0) { 799 warnx("Can't connect to `%s:%s'", host, port); 800 goto cleanup_fetch_url; 801 } 802 803 oldalrm = xsignal(SIGALRM, timeouthttp); 804 alarmtimer(quit_time ? quit_time : 60); 805 fin = fetch_fdopen(s, "r+"); 806 fetch_set_ssl(fin, ssl); 807 alarmtimer(0); 808 809 alarmtimer(quit_time ? quit_time : 60); 810 /* 811 * Construct and send the request. 812 */ 813 if (verbose) 814 fprintf(ttyout, "Requesting %s\n", url); 815 leading = " ("; 816 hasleading = 0; 817 if (isproxy) { 818 if (verbose) { 819 fprintf(ttyout, "%svia %s:%s", leading, 820 host, port); 821 leading = ", "; 822 hasleading++; 823 } 824 fetch_printf(fin, "GET %s HTTP/1.0\r\n", path); 825 if (flushcache) 826 fetch_printf(fin, "Pragma: no-cache\r\n"); 827 } else { 828 fetch_printf(fin, "GET %s HTTP/1.1\r\n", path); 829 if (strchr(host, ':')) { 830 char *h, *p; 831 832 /* 833 * strip off IPv6 scope identifier, since it is 834 * local to the node 835 */ 836 h = ftp_strdup(host); 837 if (isipv6addr(h) && 838 (p = strchr(h, '%')) != NULL) { 839 *p = '\0'; 840 } 841 fetch_printf(fin, "Host: [%s]", h); 842 free(h); 843 } else 844 fetch_printf(fin, "Host: %s", host); 845 #ifdef WITH_SSL 846 if ((urltype == HTTP_URL_T && portnum != HTTP_PORT) || 847 (urltype == HTTPS_URL_T && portnum != HTTPS_PORT)) 848 #else 849 if (portnum != HTTP_PORT) 850 #endif 851 fetch_printf(fin, ":%u", portnum); 852 fetch_printf(fin, "\r\n"); 853 fetch_printf(fin, "Accept: */*\r\n"); 854 fetch_printf(fin, "Connection: close\r\n"); 855 if (restart_point) { 856 fputs(leading, ttyout); 857 fetch_printf(fin, "Range: bytes=" LLF "-\r\n", 858 (LLT)restart_point); 859 fprintf(ttyout, "restarting at " LLF, 860 (LLT)restart_point); 861 leading = ", "; 862 hasleading++; 863 } 864 if (flushcache) 865 fetch_printf(fin, "Cache-Control: no-cache\r\n"); 866 } 867 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 868 fetch_printf(fin, "User-Agent: %s\r\n", useragent); 869 } else { 870 fetch_printf(fin, "User-Agent: %s/%s\r\n", 871 FTP_PRODUCT, FTP_VERSION); 872 } 873 if (wwwauth) { 874 if (verbose) { 875 fprintf(ttyout, "%swith authorization", 876 leading); 877 leading = ", "; 878 hasleading++; 879 } 880 fetch_printf(fin, "Authorization: %s\r\n", wwwauth); 881 } 882 if (proxyauth) { 883 if (verbose) { 884 fprintf(ttyout, 885 "%swith proxy authorization", leading); 886 leading = ", "; 887 hasleading++; 888 } 889 fetch_printf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 890 } 891 if (verbose && hasleading) 892 fputs(")\n", ttyout); 893 fetch_printf(fin, "\r\n"); 894 if (fetch_flush(fin) == EOF) { 895 warn("Writing HTTP request"); 896 alarmtimer(0); 897 goto cleanup_fetch_url; 898 } 899 alarmtimer(0); 900 901 /* Read the response */ 902 alarmtimer(quit_time ? quit_time : 60); 903 len = fetch_getline(fin, buf, sizeof(buf), &errormsg); 904 alarmtimer(0); 905 if (len < 0) { 906 if (*errormsg == '\n') 907 errormsg++; 908 warnx("Receiving HTTP reply: %s", errormsg); 909 goto cleanup_fetch_url; 910 } 911 while (len > 0 && (ISLWS(buf[len-1]))) 912 buf[--len] = '\0'; 913 DPRINTF("%s: received `%s'\n", __func__, buf); 914 915 /* Determine HTTP response code */ 916 cp = strchr(buf, ' '); 917 if (cp == NULL) 918 goto improper; 919 else 920 cp++; 921 hcode = strtol(cp, &ep, 10); 922 if (*ep != '\0' && !isspace((unsigned char)*ep)) 923 goto improper; 924 message = ftp_strdup(cp); 925 926 /* Read the rest of the header. */ 927 while (1) { 928 alarmtimer(quit_time ? quit_time : 60); 929 len = fetch_getline(fin, buf, sizeof(buf), &errormsg); 930 alarmtimer(0); 931 if (len < 0) { 932 if (*errormsg == '\n') 933 errormsg++; 934 warnx("Receiving HTTP reply: %s", errormsg); 935 goto cleanup_fetch_url; 936 } 937 while (len > 0 && (ISLWS(buf[len-1]))) 938 buf[--len] = '\0'; 939 if (len == 0) 940 break; 941 DPRINTF("%s: received `%s'\n", __func__, buf); 942 943 /* 944 * Look for some headers 945 */ 946 947 cp = buf; 948 949 if (match_token(&cp, "Content-Length:")) { 950 filesize = STRTOLL(cp, &ep, 10); 951 if (filesize < 0 || *ep != '\0') 952 goto improper; 953 DPRINTF("%s: parsed len as: " LLF "\n", 954 __func__, (LLT)filesize); 955 956 } else if (match_token(&cp, "Content-Range:")) { 957 if (! match_token(&cp, "bytes")) 958 goto improper; 959 960 if (*cp == '*') 961 cp++; 962 else { 963 rangestart = STRTOLL(cp, &ep, 10); 964 if (rangestart < 0 || *ep != '-') 965 goto improper; 966 cp = ep + 1; 967 rangeend = STRTOLL(cp, &ep, 10); 968 if (rangeend < 0 || rangeend < rangestart) 969 goto improper; 970 cp = ep; 971 } 972 if (*cp != '/') 973 goto improper; 974 cp++; 975 if (*cp == '*') 976 cp++; 977 else { 978 entitylen = STRTOLL(cp, &ep, 10); 979 if (entitylen < 0) 980 goto improper; 981 cp = ep; 982 } 983 if (*cp != '\0') 984 goto improper; 985 986 #ifndef NO_DEBUG 987 if (ftp_debug) { 988 fprintf(ttyout, "parsed range as: "); 989 if (rangestart == -1) 990 fprintf(ttyout, "*"); 991 else 992 fprintf(ttyout, LLF "-" LLF, 993 (LLT)rangestart, 994 (LLT)rangeend); 995 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 996 } 997 #endif 998 if (! restart_point) { 999 warnx( 1000 "Received unexpected Content-Range header"); 1001 goto cleanup_fetch_url; 1002 } 1003 1004 } else if (match_token(&cp, "Last-Modified:")) { 1005 struct tm parsed; 1006 const char *t; 1007 1008 memset(&parsed, 0, sizeof(parsed)); 1009 t = parse_rfc2616time(&parsed, cp); 1010 if (t != NULL) { 1011 parsed.tm_isdst = -1; 1012 if (*t == '\0') 1013 mtime = timegm(&parsed); 1014 #ifndef NO_DEBUG 1015 if (ftp_debug && mtime != -1) { 1016 fprintf(ttyout, 1017 "parsed time as: %s", 1018 rfc2822time(localtime(&mtime))); 1019 } 1020 #endif 1021 } 1022 1023 } else if (match_token(&cp, "Location:")) { 1024 location = ftp_strdup(cp); 1025 DPRINTF("%s: parsed location as `%s'\n", 1026 __func__, cp); 1027 1028 } else if (match_token(&cp, "Transfer-Encoding:")) { 1029 if (match_token(&cp, "binary")) { 1030 warnx( 1031 "Bogus transfer encoding `binary' (fetching anyway)"); 1032 continue; 1033 } 1034 if (! (token = match_token(&cp, "chunked"))) { 1035 warnx( 1036 "Unsupported transfer encoding `%s'", 1037 token); 1038 goto cleanup_fetch_url; 1039 } 1040 ischunked++; 1041 DPRINTF("%s: using chunked encoding\n", 1042 __func__); 1043 1044 } else if (match_token(&cp, "Proxy-Authenticate:") 1045 || match_token(&cp, "WWW-Authenticate:")) { 1046 if (! (token = match_token(&cp, "Basic"))) { 1047 DPRINTF("%s: skipping unknown auth " 1048 "scheme `%s'\n", __func__, token); 1049 continue; 1050 } 1051 FREEPTR(auth); 1052 auth = ftp_strdup(token); 1053 DPRINTF("%s: parsed auth as `%s'\n", 1054 __func__, cp); 1055 } 1056 1057 } 1058 /* finished parsing header */ 1059 1060 switch (hcode) { 1061 case 200: 1062 break; 1063 case 206: 1064 if (! restart_point) { 1065 warnx("Not expecting partial content header"); 1066 goto cleanup_fetch_url; 1067 } 1068 break; 1069 case 300: 1070 case 301: 1071 case 302: 1072 case 303: 1073 case 305: 1074 case 307: 1075 if (EMPTYSTRING(location)) { 1076 warnx( 1077 "No redirection Location provided by server"); 1078 goto cleanup_fetch_url; 1079 } 1080 if (redirect_loop++ > 5) { 1081 warnx("Too many redirections requested"); 1082 goto cleanup_fetch_url; 1083 } 1084 if (hcode == 305) { 1085 if (verbose) 1086 fprintf(ttyout, "Redirected via %s\n", 1087 location); 1088 rval = fetch_url(url, location, 1089 proxyauth, wwwauth); 1090 } else { 1091 if (verbose) 1092 fprintf(ttyout, "Redirected to %s\n", 1093 location); 1094 rval = go_fetch(location); 1095 } 1096 goto cleanup_fetch_url; 1097 #ifndef NO_AUTH 1098 case 401: 1099 case 407: 1100 { 1101 char **authp; 1102 char *auser, *apass; 1103 1104 if (hcode == 401) { 1105 authp = &wwwauth; 1106 auser = uuser; 1107 apass = pass; 1108 } else { 1109 authp = &proxyauth; 1110 auser = puser; 1111 apass = ppass; 1112 } 1113 if (verbose || *authp == NULL || 1114 auser == NULL || apass == NULL) 1115 fprintf(ttyout, "%s\n", message); 1116 if (EMPTYSTRING(auth)) { 1117 warnx( 1118 "No authentication challenge provided by server"); 1119 goto cleanup_fetch_url; 1120 } 1121 if (*authp != NULL) { 1122 char reply[10]; 1123 1124 fprintf(ttyout, 1125 "Authorization failed. Retry (y/n)? "); 1126 if (get_line(stdin, reply, sizeof(reply), NULL) 1127 < 0) { 1128 goto cleanup_fetch_url; 1129 } 1130 if (tolower((unsigned char)reply[0]) != 'y') 1131 goto cleanup_fetch_url; 1132 auser = NULL; 1133 apass = NULL; 1134 } 1135 if (auth_url(auth, authp, auser, apass) == 0) { 1136 rval = fetch_url(url, penv, 1137 proxyauth, wwwauth); 1138 memset(*authp, 0, strlen(*authp)); 1139 FREEPTR(*authp); 1140 } 1141 goto cleanup_fetch_url; 1142 } 1143 #endif 1144 default: 1145 if (message) 1146 warnx("Error retrieving file `%s'", message); 1147 else 1148 warnx("Unknown error retrieving file"); 1149 goto cleanup_fetch_url; 1150 } 1151 } /* end of ftp:// or http:// specific setup */ 1152 1153 /* Open the output file. */ 1154 if (strcmp(savefile, "-") == 0) { 1155 fout = stdout; 1156 } else if (*savefile == '|') { 1157 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1158 fout = popen(savefile + 1, "w"); 1159 if (fout == NULL) { 1160 warn("Can't execute `%s'", savefile + 1); 1161 goto cleanup_fetch_url; 1162 } 1163 closefunc = pclose; 1164 } else { 1165 if ((rangeend != -1 && rangeend <= restart_point) || 1166 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1167 /* already done */ 1168 if (verbose) 1169 fprintf(ttyout, "already done\n"); 1170 rval = 0; 1171 goto cleanup_fetch_url; 1172 } 1173 if (restart_point && rangestart != -1) { 1174 if (entitylen != -1) 1175 filesize = entitylen; 1176 if (rangestart != restart_point) { 1177 warnx( 1178 "Size of `%s' differs from save file `%s'", 1179 url, savefile); 1180 goto cleanup_fetch_url; 1181 } 1182 fout = fopen(savefile, "a"); 1183 } else 1184 fout = fopen(savefile, "w"); 1185 if (fout == NULL) { 1186 warn("Can't open `%s'", savefile); 1187 goto cleanup_fetch_url; 1188 } 1189 closefunc = fclose; 1190 } 1191 1192 /* Trap signals */ 1193 oldquit = xsignal(SIGQUIT, psummary); 1194 oldint = xsignal(SIGINT, aborthttp); 1195 1196 assert(rcvbuf_size > 0); 1197 if ((size_t)rcvbuf_size > bufsize) { 1198 if (xferbuf) 1199 (void)free(xferbuf); 1200 bufsize = rcvbuf_size; 1201 xferbuf = ftp_malloc(bufsize); 1202 } 1203 1204 bytes = 0; 1205 hashbytes = mark; 1206 if (oldalrm) { 1207 (void)xsignal(SIGALRM, oldalrm); 1208 oldalrm = NULL; 1209 } 1210 progressmeter(-1); 1211 1212 /* Finally, suck down the file. */ 1213 do { 1214 long chunksize; 1215 short lastchunk; 1216 1217 chunksize = 0; 1218 lastchunk = 0; 1219 /* read chunk-size */ 1220 if (ischunked) { 1221 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1222 warnx("Unexpected EOF reading chunk-size"); 1223 goto cleanup_fetch_url; 1224 } 1225 errno = 0; 1226 chunksize = strtol(xferbuf, &ep, 16); 1227 if (ep == xferbuf) { 1228 warnx("Invalid chunk-size"); 1229 goto cleanup_fetch_url; 1230 } 1231 if (errno == ERANGE || chunksize < 0) { 1232 errno = ERANGE; 1233 warn("Chunk-size `%.*s'", 1234 (int)(ep-xferbuf), xferbuf); 1235 goto cleanup_fetch_url; 1236 } 1237 1238 /* 1239 * XXX: Work around bug in Apache 1.3.9 and 1240 * 1.3.11, which incorrectly put trailing 1241 * space after the chunk-size. 1242 */ 1243 while (*ep == ' ') 1244 ep++; 1245 1246 /* skip [ chunk-ext ] */ 1247 if (*ep == ';') { 1248 while (*ep && *ep != '\r') 1249 ep++; 1250 } 1251 1252 if (strcmp(ep, "\r\n") != 0) { 1253 warnx("Unexpected data following chunk-size"); 1254 goto cleanup_fetch_url; 1255 } 1256 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1257 (LLT)chunksize); 1258 if (chunksize == 0) { 1259 lastchunk = 1; 1260 goto chunkdone; 1261 } 1262 } 1263 /* transfer file or chunk */ 1264 while (1) { 1265 struct timeval then, now, td; 1266 volatile off_t bufrem; 1267 1268 if (rate_get) 1269 (void)gettimeofday(&then, NULL); 1270 bufrem = rate_get ? rate_get : (off_t)bufsize; 1271 if (ischunked) 1272 bufrem = MIN(chunksize, bufrem); 1273 while (bufrem > 0) { 1274 flen = fetch_read(xferbuf, sizeof(char), 1275 MIN((off_t)bufsize, bufrem), fin); 1276 if (flen <= 0) 1277 goto chunkdone; 1278 bytes += flen; 1279 bufrem -= flen; 1280 if (fwrite(xferbuf, sizeof(char), flen, fout) 1281 != flen) { 1282 warn("Writing `%s'", savefile); 1283 goto cleanup_fetch_url; 1284 } 1285 if (hash && !progress) { 1286 while (bytes >= hashbytes) { 1287 (void)putc('#', ttyout); 1288 hashbytes += mark; 1289 } 1290 (void)fflush(ttyout); 1291 } 1292 if (ischunked) { 1293 chunksize -= flen; 1294 if (chunksize <= 0) 1295 break; 1296 } 1297 } 1298 if (rate_get) { 1299 while (1) { 1300 (void)gettimeofday(&now, NULL); 1301 timersub(&now, &then, &td); 1302 if (td.tv_sec > 0) 1303 break; 1304 usleep(1000000 - td.tv_usec); 1305 } 1306 } 1307 if (ischunked && chunksize <= 0) 1308 break; 1309 } 1310 /* read CRLF after chunk*/ 1311 chunkdone: 1312 if (ischunked) { 1313 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1314 alarmtimer(0); 1315 warnx("Unexpected EOF reading chunk CRLF"); 1316 goto cleanup_fetch_url; 1317 } 1318 if (strcmp(xferbuf, "\r\n") != 0) { 1319 warnx("Unexpected data following chunk"); 1320 goto cleanup_fetch_url; 1321 } 1322 if (lastchunk) 1323 break; 1324 } 1325 } while (ischunked); 1326 1327 /* XXX: deal with optional trailer & CRLF here? */ 1328 1329 if (hash && !progress && bytes > 0) { 1330 if (bytes < mark) 1331 (void)putc('#', ttyout); 1332 (void)putc('\n', ttyout); 1333 } 1334 if (fetch_error(fin)) { 1335 warn("Reading file"); 1336 goto cleanup_fetch_url; 1337 } 1338 progressmeter(1); 1339 (void)fflush(fout); 1340 if (closefunc == fclose && mtime != -1) { 1341 struct timeval tval[2]; 1342 1343 (void)gettimeofday(&tval[0], NULL); 1344 tval[1].tv_sec = mtime; 1345 tval[1].tv_usec = 0; 1346 (*closefunc)(fout); 1347 fout = NULL; 1348 1349 if (utimes(savefile, tval) == -1) { 1350 fprintf(ttyout, 1351 "Can't change modification time to %s", 1352 rfc2822time(localtime(&mtime))); 1353 } 1354 } 1355 if (bytes > 0) 1356 ptransfer(0); 1357 bytes = 0; 1358 1359 rval = 0; 1360 goto cleanup_fetch_url; 1361 1362 improper: 1363 warnx("Improper response from `%s:%s'", host, port); 1364 1365 cleanup_fetch_url: 1366 if (oldint) 1367 (void)xsignal(SIGINT, oldint); 1368 if (oldpipe) 1369 (void)xsignal(SIGPIPE, oldpipe); 1370 if (oldalrm) 1371 (void)xsignal(SIGALRM, oldalrm); 1372 if (oldquit) 1373 (void)xsignal(SIGQUIT, oldpipe); 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 int len; 1409 1410 sigint_raised = 1; 1411 alarmtimer(0); 1412 if (fromatty) { 1413 len = snprintf(msgbuf, sizeof(msgbuf), 1414 "\n%s: HTTP fetch aborted.\n", getprogname()); 1415 if (len > 0) 1416 write(fileno(ttyout), msgbuf, len); 1417 } 1418 siglongjmp(httpabort, 1); 1419 } 1420 1421 static void 1422 timeouthttp(int notused) 1423 { 1424 char msgbuf[100]; 1425 int len; 1426 1427 alarmtimer(0); 1428 if (fromatty) { 1429 len = snprintf(msgbuf, sizeof(msgbuf), 1430 "\n%s: HTTP fetch timeout.\n", getprogname()); 1431 if (len > 0) 1432 write(fileno(ttyout), msgbuf, len); 1433 } 1434 siglongjmp(httpabort, 1); 1435 } 1436 1437 /* 1438 * Retrieve ftp URL or classic ftp argument using FTP. 1439 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1440 * is still open (e.g, ftp xfer with trailing /) 1441 */ 1442 static int 1443 fetch_ftp(const char *url) 1444 { 1445 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1446 char *host, *path, *dir, *file, *uuser, *pass; 1447 char *port; 1448 char cmdbuf[MAXPATHLEN]; 1449 char dirbuf[4]; 1450 int dirhasglob, filehasglob, rval, transtype, xargc; 1451 int oanonftp, oautologin; 1452 in_port_t portnum; 1453 url_t urltype; 1454 1455 DPRINTF("fetch_ftp: `%s'\n", url); 1456 host = path = dir = file = uuser = pass = NULL; 1457 port = NULL; 1458 rval = 1; 1459 transtype = TYPE_I; 1460 1461 if (STRNEQUAL(url, FTP_URL)) { 1462 if ((parse_url(url, "URL", &urltype, &uuser, &pass, 1463 &host, &port, &portnum, &path) == -1) || 1464 (uuser != NULL && *uuser == '\0') || 1465 EMPTYSTRING(host)) { 1466 warnx("Invalid URL `%s'", url); 1467 goto cleanup_fetch_ftp; 1468 } 1469 /* 1470 * Note: Don't url_decode(path) here. We need to keep the 1471 * distinction between "/" and "%2F" until later. 1472 */ 1473 1474 /* check for trailing ';type=[aid]' */ 1475 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1476 if (strcasecmp(cp, ";type=a") == 0) 1477 transtype = TYPE_A; 1478 else if (strcasecmp(cp, ";type=i") == 0) 1479 transtype = TYPE_I; 1480 else if (strcasecmp(cp, ";type=d") == 0) { 1481 warnx( 1482 "Directory listing via a URL is not supported"); 1483 goto cleanup_fetch_ftp; 1484 } else { 1485 warnx("Invalid suffix `%s' in URL `%s'", cp, 1486 url); 1487 goto cleanup_fetch_ftp; 1488 } 1489 *cp = 0; 1490 } 1491 } else { /* classic style `[user@]host:[file]' */ 1492 urltype = CLASSIC_URL_T; 1493 host = ftp_strdup(url); 1494 cp = strchr(host, '@'); 1495 if (cp != NULL) { 1496 *cp = '\0'; 1497 uuser = host; 1498 anonftp = 0; /* disable anonftp */ 1499 host = ftp_strdup(cp + 1); 1500 } 1501 cp = strchr(host, ':'); 1502 if (cp != NULL) { 1503 *cp = '\0'; 1504 path = ftp_strdup(cp + 1); 1505 } 1506 } 1507 if (EMPTYSTRING(host)) 1508 goto cleanup_fetch_ftp; 1509 1510 /* Extract the file and (if present) directory name. */ 1511 dir = path; 1512 if (! EMPTYSTRING(dir)) { 1513 /* 1514 * If we are dealing with classic `[user@]host:[path]' syntax, 1515 * then a path of the form `/file' (resulting from input of the 1516 * form `host:/file') means that we should do "CWD /" before 1517 * retrieving the file. So we set dir="/" and file="file". 1518 * 1519 * But if we are dealing with URLs like `ftp://host/path' then 1520 * a path of the form `/file' (resulting from a URL of the form 1521 * `ftp://host//file') means that we should do `CWD ' (with an 1522 * empty argument) before retrieving the file. So we set 1523 * dir="" and file="file". 1524 * 1525 * If the path does not contain / at all, we set dir=NULL. 1526 * (We get a path without any slashes if we are dealing with 1527 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1528 * 1529 * In all other cases, we set dir to a string that does not 1530 * include the final '/' that separates the dir part from the 1531 * file part of the path. (This will be the empty string if 1532 * and only if we are dealing with a path of the form `/file' 1533 * resulting from an URL of the form `ftp://host//file'.) 1534 */ 1535 cp = strrchr(dir, '/'); 1536 if (cp == dir && urltype == CLASSIC_URL_T) { 1537 file = cp + 1; 1538 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1539 dir = dirbuf; 1540 } else if (cp != NULL) { 1541 *cp++ = '\0'; 1542 file = cp; 1543 } else { 1544 file = dir; 1545 dir = NULL; 1546 } 1547 } else 1548 dir = NULL; 1549 if (urltype == FTP_URL_T && file != NULL) { 1550 url_decode(file); 1551 /* but still don't url_decode(dir) */ 1552 } 1553 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1554 "path `%s' dir `%s' file `%s'\n", 1555 STRorNULL(uuser), STRorNULL(pass), 1556 STRorNULL(host), STRorNULL(port), 1557 STRorNULL(path), STRorNULL(dir), STRorNULL(file)); 1558 1559 dirhasglob = filehasglob = 0; 1560 if (doglob && urltype == CLASSIC_URL_T) { 1561 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1562 dirhasglob = 1; 1563 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1564 filehasglob = 1; 1565 } 1566 1567 /* Set up the connection */ 1568 oanonftp = anonftp; 1569 if (connected) 1570 disconnect(0, NULL); 1571 anonftp = oanonftp; 1572 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1573 xargv[0] = cmdbuf; 1574 xargv[1] = host; 1575 xargv[2] = NULL; 1576 xargc = 2; 1577 if (port) { 1578 xargv[2] = port; 1579 xargv[3] = NULL; 1580 xargc = 3; 1581 } 1582 oautologin = autologin; 1583 /* don't autologin in setpeer(), use ftp_login() below */ 1584 autologin = 0; 1585 setpeer(xargc, xargv); 1586 autologin = oautologin; 1587 if ((connected == 0) || 1588 (connected == 1 && !ftp_login(host, uuser, pass))) { 1589 warnx("Can't connect or login to host `%s:%s'", 1590 host, port ? port : "?"); 1591 goto cleanup_fetch_ftp; 1592 } 1593 1594 switch (transtype) { 1595 case TYPE_A: 1596 setascii(1, xargv); 1597 break; 1598 case TYPE_I: 1599 setbinary(1, xargv); 1600 break; 1601 default: 1602 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1603 } 1604 1605 /* 1606 * Change directories, if necessary. 1607 * 1608 * Note: don't use EMPTYSTRING(dir) below, because 1609 * dir=="" means something different from dir==NULL. 1610 */ 1611 if (dir != NULL && !dirhasglob) { 1612 char *nextpart; 1613 1614 /* 1615 * If we are dealing with a classic `[user@]host:[path]' 1616 * (urltype is CLASSIC_URL_T) then we have a raw directory 1617 * name (not encoded in any way) and we can change 1618 * directories in one step. 1619 * 1620 * If we are dealing with an `ftp://host/path' URL 1621 * (urltype is FTP_URL_T), then RFC 3986 says we need to 1622 * send a separate CWD command for each unescaped "/" 1623 * in the path, and we have to interpret %hex escaping 1624 * *after* we find the slashes. It's possible to get 1625 * empty components here, (from multiple adjacent 1626 * slashes in the path) and RFC 3986 says that we should 1627 * still do `CWD ' (with a null argument) in such cases. 1628 * 1629 * Many ftp servers don't support `CWD ', so if there's an 1630 * error performing that command, bail out with a descriptive 1631 * message. 1632 * 1633 * Examples: 1634 * 1635 * host: dir="", urltype=CLASSIC_URL_T 1636 * logged in (to default directory) 1637 * host:file dir=NULL, urltype=CLASSIC_URL_T 1638 * "RETR file" 1639 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1640 * "CWD dir", logged in 1641 * ftp://host/ dir="", urltype=FTP_URL_T 1642 * logged in (to default directory) 1643 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1644 * "CWD dir", logged in 1645 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1646 * "RETR file" 1647 * ftp://host//file dir="", urltype=FTP_URL_T 1648 * "CWD ", "RETR file" 1649 * host:/file dir="/", urltype=CLASSIC_URL_T 1650 * "CWD /", "RETR file" 1651 * ftp://host///file dir="/", urltype=FTP_URL_T 1652 * "CWD ", "CWD ", "RETR file" 1653 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1654 * "CWD /", "RETR file" 1655 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1656 * "CWD foo", "RETR file" 1657 * ftp://host/foo/bar/file dir="foo/bar" 1658 * "CWD foo", "CWD bar", "RETR file" 1659 * ftp://host//foo/bar/file dir="/foo/bar" 1660 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1661 * ftp://host/foo//bar/file dir="foo//bar" 1662 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1663 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1664 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1665 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1666 * "CWD /foo", "CWD bar", "RETR file" 1667 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1668 * "CWD /foo/bar", "RETR file" 1669 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1670 * "RETR /foo/bar/file" 1671 * 1672 * Note that we don't need `dir' after this point. 1673 */ 1674 do { 1675 if (urltype == FTP_URL_T) { 1676 nextpart = strchr(dir, '/'); 1677 if (nextpart) { 1678 *nextpart = '\0'; 1679 nextpart++; 1680 } 1681 url_decode(dir); 1682 } else 1683 nextpart = NULL; 1684 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 1685 STRorNULL(dir), STRorNULL(nextpart)); 1686 if (urltype == FTP_URL_T || *dir != '\0') { 1687 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 1688 xargv[0] = cmdbuf; 1689 xargv[1] = dir; 1690 xargv[2] = NULL; 1691 dirchange = 0; 1692 cd(2, xargv); 1693 if (! dirchange) { 1694 if (*dir == '\0' && code == 500) 1695 fprintf(stderr, 1696 "\n" 1697 "ftp: The `CWD ' command (without a directory), which is required by\n" 1698 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 1699 " conflicts with the server's conformance to RFC 959.\n" 1700 " Try the same URL without the `//' in the URL pathname.\n" 1701 "\n"); 1702 goto cleanup_fetch_ftp; 1703 } 1704 } 1705 dir = nextpart; 1706 } while (dir != NULL); 1707 } 1708 1709 if (EMPTYSTRING(file)) { 1710 rval = -1; 1711 goto cleanup_fetch_ftp; 1712 } 1713 1714 if (dirhasglob) { 1715 (void)strlcpy(rempath, dir, sizeof(rempath)); 1716 (void)strlcat(rempath, "/", sizeof(rempath)); 1717 (void)strlcat(rempath, file, sizeof(rempath)); 1718 file = rempath; 1719 } 1720 1721 /* Fetch the file(s). */ 1722 xargc = 2; 1723 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 1724 xargv[0] = cmdbuf; 1725 xargv[1] = file; 1726 xargv[2] = NULL; 1727 if (dirhasglob || filehasglob) { 1728 int ointeractive; 1729 1730 ointeractive = interactive; 1731 interactive = 0; 1732 if (restartautofetch) 1733 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 1734 else 1735 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 1736 xargv[0] = cmdbuf; 1737 mget(xargc, xargv); 1738 interactive = ointeractive; 1739 } else { 1740 if (outfile == NULL) { 1741 cp = strrchr(file, '/'); /* find savefile */ 1742 if (cp != NULL) 1743 outfile = cp + 1; 1744 else 1745 outfile = file; 1746 } 1747 xargv[2] = (char *)outfile; 1748 xargv[3] = NULL; 1749 xargc++; 1750 if (restartautofetch) 1751 reget(xargc, xargv); 1752 else 1753 get(xargc, xargv); 1754 } 1755 1756 if ((code / 100) == COMPLETE) 1757 rval = 0; 1758 1759 cleanup_fetch_ftp: 1760 FREEPTR(port); 1761 FREEPTR(host); 1762 FREEPTR(path); 1763 FREEPTR(uuser); 1764 if (pass) 1765 memset(pass, 0, strlen(pass)); 1766 FREEPTR(pass); 1767 return (rval); 1768 } 1769 1770 /* 1771 * Retrieve the given file to outfile. 1772 * Supports arguments of the form: 1773 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1774 * call fetch_ftp() 1775 * "http://host/path" call fetch_url() to use HTTP 1776 * "file:///path" call fetch_url() to copy 1777 * "about:..." print a message 1778 * 1779 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1780 * is still open (e.g, ftp xfer with trailing /) 1781 */ 1782 static int 1783 go_fetch(const char *url) 1784 { 1785 char *proxyenv; 1786 char *p; 1787 1788 #ifndef NO_ABOUT 1789 /* 1790 * Check for about:* 1791 */ 1792 if (STRNEQUAL(url, ABOUT_URL)) { 1793 url += sizeof(ABOUT_URL) -1; 1794 if (strcasecmp(url, "ftp") == 0 || 1795 strcasecmp(url, "tnftp") == 0) { 1796 fputs( 1797 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1798 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1799 } else if (strcasecmp(url, "lukem") == 0) { 1800 fputs( 1801 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1802 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1803 } else if (strcasecmp(url, "netbsd") == 0) { 1804 fputs( 1805 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1806 "For more information, see http://www.NetBSD.org/\n", ttyout); 1807 } else if (strcasecmp(url, "version") == 0) { 1808 fprintf(ttyout, "Version: %s %s%s\n", 1809 FTP_PRODUCT, FTP_VERSION, 1810 #ifdef INET6 1811 "" 1812 #else 1813 " (-IPv6)" 1814 #endif 1815 ); 1816 } else { 1817 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1818 } 1819 fputs("\n", ttyout); 1820 return (0); 1821 } 1822 #endif 1823 1824 /* 1825 * Check for file:// and http:// URLs. 1826 */ 1827 if (STRNEQUAL(url, HTTP_URL) 1828 #ifdef WITH_SSL 1829 || STRNEQUAL(url, HTTPS_URL) 1830 #endif 1831 || STRNEQUAL(url, FILE_URL)) 1832 return (fetch_url(url, NULL, NULL, NULL)); 1833 1834 /* 1835 * If it contains "://" but does not begin with ftp:// 1836 * or something that was already handled, then it's 1837 * unsupported. 1838 * 1839 * If it contains ":" but not "://" then we assume the 1840 * part before the colon is a host name, not an URL scheme, 1841 * so we don't try to match that here. 1842 */ 1843 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 1844 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 1845 1846 /* 1847 * Try FTP URL-style and host:file arguments next. 1848 * If ftpproxy is set with an FTP URL, use fetch_url() 1849 * Othewise, use fetch_ftp(). 1850 */ 1851 proxyenv = getoptionvalue("ftp_proxy"); 1852 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 1853 return (fetch_url(url, NULL, NULL, NULL)); 1854 1855 return (fetch_ftp(url)); 1856 } 1857 1858 /* 1859 * Retrieve multiple files from the command line, 1860 * calling go_fetch() for each file. 1861 * 1862 * If an ftp path has a trailing "/", the path will be cd-ed into and 1863 * the connection remains open, and the function will return -1 1864 * (to indicate the connection is alive). 1865 * If an error occurs the return value will be the offset+1 in 1866 * argv[] of the file that caused a problem (i.e, argv[x] 1867 * returns x+1) 1868 * Otherwise, 0 is returned if all files retrieved successfully. 1869 */ 1870 int 1871 auto_fetch(int argc, char *argv[]) 1872 { 1873 volatile int argpos, rval; 1874 1875 argpos = rval = 0; 1876 1877 if (sigsetjmp(toplevel, 1)) { 1878 if (connected) 1879 disconnect(0, NULL); 1880 if (rval > 0) 1881 rval = argpos + 1; 1882 return (rval); 1883 } 1884 (void)xsignal(SIGINT, intr); 1885 (void)xsignal(SIGPIPE, lostpeer); 1886 1887 /* 1888 * Loop through as long as there's files to fetch. 1889 */ 1890 for (; (rval == 0) && (argpos < argc); argpos++) { 1891 if (strchr(argv[argpos], ':') == NULL) 1892 break; 1893 redirect_loop = 0; 1894 if (!anonftp) 1895 anonftp = 2; /* Handle "automatic" transfers. */ 1896 rval = go_fetch(argv[argpos]); 1897 if (outfile != NULL && strcmp(outfile, "-") != 0 1898 && outfile[0] != '|') 1899 outfile = NULL; 1900 if (rval > 0) 1901 rval = argpos + 1; 1902 } 1903 1904 if (connected && rval != -1) 1905 disconnect(0, NULL); 1906 return (rval); 1907 } 1908 1909 1910 /* 1911 * Upload multiple files from the command line. 1912 * 1913 * If an error occurs the return value will be the offset+1 in 1914 * argv[] of the file that caused a problem (i.e, argv[x] 1915 * returns x+1) 1916 * Otherwise, 0 is returned if all files uploaded successfully. 1917 */ 1918 int 1919 auto_put(int argc, char **argv, const char *uploadserver) 1920 { 1921 char *uargv[4], *path, *pathsep; 1922 int uargc, rval, argpos; 1923 size_t len; 1924 char cmdbuf[MAX_C_NAME]; 1925 1926 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 1927 uargv[0] = cmdbuf; 1928 uargv[1] = argv[0]; 1929 uargc = 2; 1930 uargv[2] = uargv[3] = NULL; 1931 pathsep = NULL; 1932 rval = 1; 1933 1934 DPRINTF("auto_put: target `%s'\n", uploadserver); 1935 1936 path = ftp_strdup(uploadserver); 1937 len = strlen(path); 1938 if (path[len - 1] != '/' && path[len - 1] != ':') { 1939 /* 1940 * make sure we always pass a directory to auto_fetch 1941 */ 1942 if (argc > 1) { /* more than one file to upload */ 1943 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1944 free(path); 1945 path = (char *)ftp_malloc(len); 1946 (void)strlcpy(path, uploadserver, len); 1947 (void)strlcat(path, "/", len); 1948 } else { /* single file to upload */ 1949 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 1950 uargv[0] = cmdbuf; 1951 pathsep = strrchr(path, '/'); 1952 if (pathsep == NULL) { 1953 pathsep = strrchr(path, ':'); 1954 if (pathsep == NULL) { 1955 warnx("Invalid URL `%s'", path); 1956 goto cleanup_auto_put; 1957 } 1958 pathsep++; 1959 uargv[2] = ftp_strdup(pathsep); 1960 pathsep[0] = '/'; 1961 } else 1962 uargv[2] = ftp_strdup(pathsep + 1); 1963 pathsep[1] = '\0'; 1964 uargc++; 1965 } 1966 } 1967 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 1968 path, STRorNULL(uargv[2])); 1969 1970 /* connect and cwd */ 1971 rval = auto_fetch(1, &path); 1972 if(rval >= 0) 1973 goto cleanup_auto_put; 1974 1975 rval = 0; 1976 1977 /* target filename provided; upload 1 file */ 1978 /* XXX : is this the best way? */ 1979 if (uargc == 3) { 1980 uargv[1] = argv[0]; 1981 put(uargc, uargv); 1982 if ((code / 100) != COMPLETE) 1983 rval = 1; 1984 } else { /* otherwise a target dir: upload all files to it */ 1985 for(argpos = 0; argv[argpos] != NULL; argpos++) { 1986 uargv[1] = argv[argpos]; 1987 mput(uargc, uargv); 1988 if ((code / 100) != COMPLETE) { 1989 rval = argpos + 1; 1990 break; 1991 } 1992 } 1993 } 1994 1995 cleanup_auto_put: 1996 free(path); 1997 FREEPTR(uargv[2]); 1998 return (rval); 1999 } 2000