1/* $NetBSD: fetch.c,v 1.158 2005/05/14 15:26:43 lukem Exp $ */ 2 3/*- 4 * Copyright (c) 1997-2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Scott Aaron Bamford. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the NetBSD 24 * Foundation, Inc. and its contributors. 25 * 4. Neither the name of The NetBSD Foundation nor the names of its 26 * contributors may be used to endorse or promote products derived 27 * from this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 31 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 32 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 33 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 34 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 37 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 39 * POSSIBILITY OF SUCH DAMAGE. 40 */ 41 42#include <sys/cdefs.h> 43 44/* 45 * FTP User Program -- Command line file retrieval 46 */ 47 48#include <sys/types.h> 49#include <sys/param.h> 50#include <sys/socket.h> 51#include <sys/stat.h> 52#include <sys/time.h> 53 54#include <netinet/in.h> 55 56#include <arpa/ftp.h> 57#include <arpa/inet.h> 58 59#include <ctype.h> 60#include <err.h> 61#include <errno.h> 62#include <netdb.h> 63#include <fcntl.h> 64#include <stdio.h> 65#include <stdlib.h> 66#include <string.h> 67#include <unistd.h> 68#include <time.h> 69#include <libutil.h> 70 71#include "ftp_var.h" 72#include "version.h" 73 74typedef enum { 75 UNKNOWN_URL_T=-1, 76 HTTP_URL_T, 77 FTP_URL_T, 78 FILE_URL_T, 79 CLASSIC_URL_T 80} url_t; 81 82void aborthttp(int); 83#ifndef NO_AUTH 84static int auth_url(const char *, char **, const char *, const char *); 85static void base64_encode(const unsigned char *, size_t, unsigned char *); 86#endif 87static int go_fetch(const char *); 88static int fetch_ftp(const char *); 89static int fetch_url(const char *, const char *, char *, char *); 90static const char *match_token(const char **, const char *); 91static int parse_url(const char *, const char *, url_t *, char **, 92 char **, char **, char **, in_port_t *, char **); 93static void url_decode(char *); 94 95static int redirect_loop; 96 97 98#define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0) 99#define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t') 100#define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0) 101 102 103#define ABOUT_URL "about:" /* propaganda */ 104#define FILE_URL "file://" /* file URL prefix */ 105#define FTP_URL "ftp://" /* ftp URL prefix */ 106#define HTTP_URL "http://" /* http URL prefix */ 107 108 109/* 110 * Determine if token is the next word in buf (case insensitive). 111 * If so, advance buf past the token and any trailing LWS, and 112 * return a pointer to the token (in buf). Otherwise, return NULL. 113 * token may be preceeded by LWS. 114 * token must be followed by LWS or NUL. (I.e, don't partial match). 115 */ 116static const char * 117match_token(const char **buf, const char *token) 118{ 119 const char *p, *orig; 120 size_t tlen; 121 122 tlen = strlen(token); 123 p = *buf; 124 SKIPLWS(p); 125 orig = p; 126 if (strncasecmp(p, token, tlen) != 0) 127 return NULL; 128 p += tlen; 129 if (*p != '\0' && !ISLWS(*p)) 130 return NULL; 131 SKIPLWS(p); 132 orig = *buf; 133 *buf = p; 134 return orig; 135} 136 137#ifndef NO_AUTH 138/* 139 * Generate authorization response based on given authentication challenge. 140 * Returns -1 if an error occurred, otherwise 0. 141 * Sets response to a malloc(3)ed string; caller should free. 142 */ 143static int 144auth_url(const char *challenge, char **response, const char *guser, 145 const char *gpass) 146{ 147 const char *cp, *scheme; 148 char *ep, *clear, *realm; 149 char user[BUFSIZ], *pass; 150 int rval; 151 size_t len, clen, rlen; 152 153 *response = NULL; 154 clear = realm = NULL; 155 rval = -1; 156 cp = challenge; 157 scheme = "Basic"; /* only support Basic authentication */ 158 159 if (debug) 160 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 161 162 if (! match_token(&cp, scheme)) { 163 warnx("Unsupported authentication challenge - `%s'", 164 challenge); 165 goto cleanup_auth_url; 166 } 167 168#define REALM "realm=\"" 169 if (STRNEQUAL(cp, REALM)) 170 cp += sizeof(REALM) - 1; 171 else { 172 warnx("Unsupported authentication challenge - `%s'", 173 challenge); 174 goto cleanup_auth_url; 175 } 176/* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 177 if ((ep = strchr(cp, '\"')) != NULL) { 178 size_t len = ep - cp; 179 180 realm = (char *)xmalloc(len + 1); 181 (void)strlcpy(realm, cp, len + 1); 182 } else { 183 warnx("Unsupported authentication challenge - `%s'", 184 challenge); 185 goto cleanup_auth_url; 186 } 187 188 fprintf(ttyout, "Username for `%s': ", realm); 189 if (guser != NULL) { 190 (void)strlcpy(user, guser, sizeof(user)); 191 fprintf(ttyout, "%s\n", user); 192 } else { 193 (void)fflush(ttyout); 194 if (fgets(user, sizeof(user) - 1, stdin) == NULL) { 195 clearerr(stdin); 196 goto cleanup_auth_url; 197 } 198 user[strlen(user) - 1] = '\0'; 199 } 200 if (gpass != NULL) 201 pass = (char *)gpass; 202 else 203 pass = getpass("Password: "); 204 205 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 206 clear = (char *)xmalloc(clen); 207 (void)strlcpy(clear, user, clen); 208 (void)strlcat(clear, ":", clen); 209 (void)strlcat(clear, pass, clen); 210 if (gpass == NULL) 211 memset(pass, 0, strlen(pass)); 212 213 /* scheme + " " + enc + "\0" */ 214 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 215 *response = (char *)xmalloc(rlen); 216 (void)strlcpy(*response, scheme, rlen); 217 len = strlcat(*response, " ", rlen); 218 /* use `clen - 1' to not encode the trailing NUL */ 219 base64_encode((unsigned char *)clear, clen - 1, 220 (unsigned char *)*response + len); 221 memset(clear, 0, clen); 222 rval = 0; 223 224 cleanup_auth_url: 225 FREEPTR(clear); 226 FREEPTR(realm); 227 return (rval); 228} 229 230/* 231 * Encode len bytes starting at clear using base64 encoding into encoded, 232 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 233 */ 234static void 235base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 236{ 237 static const unsigned char enc[] = 238 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 239 unsigned char *cp; 240 int i; 241 242 cp = encoded; 243 for (i = 0; i < len; i += 3) { 244 *(cp++) = enc[((clear[i + 0] >> 2))]; 245 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 246 | ((clear[i + 1] >> 4) & 0x0f)]; 247 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 248 | ((clear[i + 2] >> 6) & 0x03)]; 249 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 250 } 251 *cp = '\0'; 252 while (i-- > len) 253 *(--cp) = '='; 254} 255#endif 256 257/* 258 * Decode %xx escapes in given string, `in-place'. 259 */ 260static void 261url_decode(char *url) 262{ 263 unsigned char *p, *q; 264 265 if (EMPTYSTRING(url)) 266 return; 267 p = q = (unsigned char *)url; 268 269#define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 270 while (*p) { 271 if (p[0] == '%' 272 && p[1] && isxdigit((unsigned char)p[1]) 273 && p[2] && isxdigit((unsigned char)p[2])) { 274 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 275 p+=3; 276 } else 277 *q++ = *p++; 278 } 279 *q = '\0'; 280} 281 282 283/* 284 * Parse URL of form: 285 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 286 * Returns -1 if a parse error occurred, otherwise 0. 287 * It's the caller's responsibility to url_decode() the returned 288 * user, pass and path. 289 * 290 * Sets type to url_t, each of the given char ** pointers to a 291 * malloc(3)ed strings of the relevant section, and port to 292 * the number given, or ftpport if ftp://, or httpport if http://. 293 * 294 * If <host> is surrounded by `[' and ']', it's parsed as an 295 * IPv6 address (as per RFC 2732). 296 * 297 * XXX: this is not totally RFC 1738 compliant; <path> will have the 298 * leading `/' unless it's an ftp:// URL, as this makes things easier 299 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 300 * host and the URL-path removed, but any additional leading slashes 301 * in the URL-path are retained (because they imply that we should 302 * later do "CWD" with a null argument). 303 * 304 * Examples: 305 * input URL output path 306 * --------- ----------- 307 * "ftp://host" NULL 308 * "http://host/" NULL 309 * "file://host/dir/file" "dir/file" 310 * "ftp://host/" "" 311 * "ftp://host//" NULL 312 * "ftp://host//dir/file" "/dir/file" 313 */ 314static int 315parse_url(const char *url, const char *desc, url_t *type, 316 char **user, char **pass, char **host, char **port, 317 in_port_t *portnum, char **path) 318{ 319 const char *origurl; 320 char *cp, *ep, *thost, *tport; 321 size_t len; 322 323 if (url == NULL || desc == NULL || type == NULL || user == NULL 324 || pass == NULL || host == NULL || port == NULL || portnum == NULL 325 || path == NULL) 326 errx(1, "parse_url: invoked with NULL argument!"); 327 328 origurl = url; 329 *type = UNKNOWN_URL_T; 330 *user = *pass = *host = *port = *path = NULL; 331 *portnum = 0; 332 tport = NULL; 333 334 if (STRNEQUAL(url, HTTP_URL)) { 335 url += sizeof(HTTP_URL) - 1; 336 *type = HTTP_URL_T; 337 *portnum = HTTP_PORT; 338 tport = httpport; 339 } else if (STRNEQUAL(url, FTP_URL)) { 340 url += sizeof(FTP_URL) - 1; 341 *type = FTP_URL_T; 342 *portnum = FTP_PORT; 343 tport = ftpport; 344 } else if (STRNEQUAL(url, FILE_URL)) { 345 url += sizeof(FILE_URL) - 1; 346 *type = FILE_URL_T; 347 } else { 348 warnx("Invalid %s `%s'", desc, url); 349 cleanup_parse_url: 350 FREEPTR(*user); 351 FREEPTR(*pass); 352 FREEPTR(*host); 353 FREEPTR(*port); 354 FREEPTR(*path); 355 return (-1); 356 } 357 358 if (*url == '\0') 359 return (0); 360 361 /* find [user[:pass]@]host[:port] */ 362 ep = strchr(url, '/'); 363 if (ep == NULL) 364 thost = xstrdup(url); 365 else { 366 len = ep - url; 367 thost = (char *)xmalloc(len + 1); 368 (void)strlcpy(thost, url, len + 1); 369 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 370 ep++; 371 *path = xstrdup(ep); 372 } 373 374 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 375 if (cp != NULL) { 376 if (*type == FTP_URL_T) 377 anonftp = 0; /* disable anonftp */ 378 *user = thost; 379 *cp = '\0'; 380 thost = xstrdup(cp + 1); 381 cp = strchr(*user, ':'); 382 if (cp != NULL) { 383 *cp = '\0'; 384 *pass = xstrdup(cp + 1); 385 } 386 url_decode(*user); 387 if (*pass) 388 url_decode(*pass); 389 } 390 391#ifdef INET6 392 /* 393 * Check if thost is an encoded IPv6 address, as per 394 * RFC 2732: 395 * `[' ipv6-address ']' 396 */ 397 if (*thost == '[') { 398 cp = thost + 1; 399 if ((ep = strchr(cp, ']')) == NULL || 400 (ep[1] != '\0' && ep[1] != ':')) { 401 warnx("Invalid address `%s' in %s `%s'", 402 thost, desc, origurl); 403 goto cleanup_parse_url; 404 } 405 len = ep - cp; /* change `[xyz]' -> `xyz' */ 406 memmove(thost, thost + 1, len); 407 thost[len] = '\0'; 408 if (! isipv6addr(thost)) { 409 warnx("Invalid IPv6 address `%s' in %s `%s'", 410 thost, desc, origurl); 411 goto cleanup_parse_url; 412 } 413 cp = ep + 1; 414 if (*cp == ':') 415 cp++; 416 else 417 cp = NULL; 418 } else 419#endif /* INET6 */ 420 if ((cp = strchr(thost, ':')) != NULL) 421 *cp++ = '\0'; 422 *host = thost; 423 424 /* look for [:port] */ 425 if (cp != NULL) { 426 long nport; 427 428 nport = parseport(cp, -1); 429 if (nport == -1) { 430 warnx("Unknown port `%s' in %s `%s'", 431 cp, desc, origurl); 432 goto cleanup_parse_url; 433 } 434 *portnum = nport; 435 tport = cp; 436 } 437 438 if (tport != NULL) 439 *port = xstrdup(tport); 440 if (*path == NULL) 441 *path = xstrdup("/"); 442 443 if (debug) 444 fprintf(ttyout, 445 "parse_url: user `%s' pass `%s' host %s port %s(%d) " 446 "path `%s'\n", 447 *user ? *user : "<null>", *pass ? *pass : "<null>", 448 *host ? *host : "<null>", *port ? *port : "<null>", 449 *portnum ? *portnum : -1, *path ? *path : "<null>"); 450 451 return (0); 452} 453 454sigjmp_buf httpabort; 455 456/* 457 * Retrieve URL, via a proxy if necessary, using HTTP. 458 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 459 * http_proxy as appropriate. 460 * Supports HTTP redirects. 461 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 462 * is still open (e.g, ftp xfer with trailing /) 463 */ 464static int 465fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 466{ 467 struct addrinfo hints, *res, *res0 = NULL; 468 int error; 469 char hbuf[NI_MAXHOST]; 470 volatile sigfunc oldintr, oldintp; 471 volatile int s; 472 struct stat sb; 473 int ischunked, isproxy, rval, hcode; 474 size_t len; 475 static size_t bufsize; 476 static char *xferbuf; 477 const char *cp, *token; 478 char *ep, *buf, *savefile; 479 char *auth, *location, *message; 480 char *user, *pass, *host, *port, *path, *decodedpath; 481 char *puser, *ppass, *useragent; 482 off_t hashbytes, rangestart, rangeend, entitylen; 483 int (*closefunc)(FILE *); 484 FILE *fin, *fout; 485 time_t mtime; 486 url_t urltype; 487 in_port_t portnum; 488 489 oldintr = oldintp = NULL; 490 closefunc = NULL; 491 fin = fout = NULL; 492 s = -1; 493 buf = savefile = NULL; 494 auth = location = message = NULL; 495 ischunked = isproxy = hcode = 0; 496 rval = 1; 497 user = pass = host = path = decodedpath = puser = ppass = NULL; 498 499#ifdef __GNUC__ /* shut up gcc warnings */ 500 (void)&closefunc; 501 (void)&fin; 502 (void)&fout; 503 (void)&buf; 504 (void)&savefile; 505 (void)&rval; 506 (void)&isproxy; 507 (void)&hcode; 508 (void)&ischunked; 509 (void)&message; 510 (void)&location; 511 (void)&auth; 512 (void)&decodedpath; 513#endif 514 515 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 516 &portnum, &path) == -1) 517 goto cleanup_fetch_url; 518 519 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 520 && strcasecmp(host, "localhost") != 0) { 521 warnx("No support for non local file URL `%s'", url); 522 goto cleanup_fetch_url; 523 } 524 525 if (EMPTYSTRING(path)) { 526 if (urltype == FTP_URL_T) { 527 rval = fetch_ftp(url); 528 goto cleanup_fetch_url; 529 } 530 if (urltype != HTTP_URL_T || outfile == NULL) { 531 warnx("Invalid URL (no file after host) `%s'", url); 532 goto cleanup_fetch_url; 533 } 534 } 535 536 decodedpath = xstrdup(path); 537 url_decode(decodedpath); 538 539 if (outfile) 540 savefile = xstrdup(outfile); 541 else { 542 cp = strrchr(decodedpath, '/'); /* find savefile */ 543 if (cp != NULL) 544 savefile = xstrdup(cp + 1); 545 else 546 savefile = xstrdup(decodedpath); 547 } 548 if (EMPTYSTRING(savefile)) { 549 if (urltype == FTP_URL_T) { 550 rval = fetch_ftp(url); 551 goto cleanup_fetch_url; 552 } 553 warnx("no file after directory (you must specify an " 554 "output file) `%s'", url); 555 goto cleanup_fetch_url; 556 } else { 557 if (debug) 558 fprintf(ttyout, "savefile `%s'\n", savefile); 559 } 560 561 restart_point = 0; 562 filesize = -1; 563 rangestart = rangeend = entitylen = -1; 564 mtime = -1; 565 if (restartautofetch) { 566 if (strcmp(savefile, "-") != 0 && *savefile != '|' && 567 stat(savefile, &sb) == 0) 568 restart_point = sb.st_size; 569 } 570 if (urltype == FILE_URL_T) { /* file:// URLs */ 571 direction = "copied"; 572 fin = fopen(decodedpath, "r"); 573 if (fin == NULL) { 574 warn("Cannot open file `%s'", decodedpath); 575 goto cleanup_fetch_url; 576 } 577 if (fstat(fileno(fin), &sb) == 0) { 578 mtime = sb.st_mtime; 579 filesize = sb.st_size; 580 } 581 if (restart_point) { 582 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) { 583 warn("Can't lseek to restart `%s'", 584 decodedpath); 585 goto cleanup_fetch_url; 586 } 587 } 588 if (verbose) { 589 fprintf(ttyout, "Copying %s", decodedpath); 590 if (restart_point) 591 fprintf(ttyout, " (restarting at " LLF ")", 592 (LLT)restart_point); 593 fputs("\n", ttyout); 594 } 595 } else { /* ftp:// or http:// URLs */ 596 char *leading; 597 int hasleading; 598 599 if (proxyenv == NULL) { 600 if (urltype == HTTP_URL_T) 601 proxyenv = getoptionvalue("http_proxy"); 602 else if (urltype == FTP_URL_T) 603 proxyenv = getoptionvalue("ftp_proxy"); 604 } 605 direction = "retrieved"; 606 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 607 url_t purltype; 608 char *phost, *ppath; 609 char *pport, *no_proxy; 610 611 isproxy = 1; 612 613 /* check URL against list of no_proxied sites */ 614 no_proxy = getoptionvalue("no_proxy"); 615 if (! EMPTYSTRING(no_proxy)) { 616 char *np, *np_copy; 617 long np_port; 618 size_t hlen, plen; 619 620 np_copy = xstrdup(no_proxy); 621 hlen = strlen(host); 622 while ((cp = strsep(&np_copy, " ,")) != NULL) { 623 if (*cp == '\0') 624 continue; 625 if ((np = strrchr(cp, ':')) != NULL) { 626 *np = '\0'; 627 np_port = 628 strtol(np + 1, &ep, 10); 629 if (*ep != '\0') 630 continue; 631 if (np_port != portnum) 632 continue; 633 } 634 plen = strlen(cp); 635 if (hlen < plen) 636 continue; 637 if (strncasecmp(host + hlen - plen, 638 cp, plen) == 0) { 639 isproxy = 0; 640 break; 641 } 642 } 643 FREEPTR(np_copy); 644 if (isproxy == 0 && urltype == FTP_URL_T) { 645 rval = fetch_ftp(url); 646 goto cleanup_fetch_url; 647 } 648 } 649 650 if (isproxy) { 651 if (parse_url(proxyenv, "proxy URL", &purltype, 652 &puser, &ppass, &phost, &pport, &portnum, 653 &ppath) == -1) 654 goto cleanup_fetch_url; 655 656 if ((purltype != HTTP_URL_T 657 && purltype != FTP_URL_T) || 658 EMPTYSTRING(phost) || 659 (! EMPTYSTRING(ppath) 660 && strcmp(ppath, "/") != 0)) { 661 warnx("Malformed proxy URL `%s'", 662 proxyenv); 663 FREEPTR(phost); 664 FREEPTR(pport); 665 FREEPTR(ppath); 666 goto cleanup_fetch_url; 667 } 668 if (isipv6addr(host) && 669 strchr(host, '%') != NULL) { 670 warnx( 671"Scoped address notation `%s' disallowed via web proxy", 672 host); 673 FREEPTR(phost); 674 FREEPTR(pport); 675 FREEPTR(ppath); 676 goto cleanup_fetch_url; 677 } 678 679 FREEPTR(host); 680 host = phost; 681 FREEPTR(port); 682 port = pport; 683 FREEPTR(path); 684 path = xstrdup(url); 685 FREEPTR(ppath); 686 } 687 } /* ! EMPTYSTRING(proxyenv) */ 688 689 memset(&hints, 0, sizeof(hints)); 690 hints.ai_flags = 0; 691 hints.ai_family = family; 692 hints.ai_socktype = SOCK_STREAM; 693 hints.ai_protocol = 0; 694 error = getaddrinfo(host, NULL, &hints, &res0); 695 if (error) { 696 warnx("%s", gai_strerror(error)); 697 goto cleanup_fetch_url; 698 } 699 if (res0->ai_canonname) 700 host = res0->ai_canonname; 701 702 s = -1; 703 for (res = res0; res; res = res->ai_next) { 704 /* 705 * see comment in hookup() 706 */ 707 ai_unmapped(res); 708 if (getnameinfo(res->ai_addr, res->ai_addrlen, 709 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 710 strlcpy(hbuf, "invalid", sizeof(hbuf)); 711 712 if (verbose && res != res0) 713 fprintf(ttyout, "Trying %s...\n", hbuf); 714 715 ((struct sockaddr_in *)res->ai_addr)->sin_port = 716 htons(portnum); 717 s = socket(res->ai_family, SOCK_STREAM, 718 res->ai_protocol); 719 if (s < 0) { 720 warn("Can't create socket"); 721 continue; 722 } 723 724 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 725 warn("Connect to address `%s'", hbuf); 726 close(s); 727 s = -1; 728 continue; 729 } 730 731 /* success */ 732 break; 733 } 734 735 if (s < 0) { 736 warn("Can't connect to %s", host); 737 goto cleanup_fetch_url; 738 } 739 740 fin = fdopen(s, "r+"); 741 /* 742 * Construct and send the request. 743 */ 744 if (verbose) 745 fprintf(ttyout, "Requesting %s\n", url); 746 leading = " ("; 747 hasleading = 0; 748 if (isproxy) { 749 if (verbose) { 750 fprintf(ttyout, "%svia %s:%s", leading, 751 host, port); 752 leading = ", "; 753 hasleading++; 754 } 755 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 756 if (flushcache) 757 fprintf(fin, "Pragma: no-cache\r\n"); 758 } else { 759 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 760 if (strchr(host, ':')) { 761 char *h, *p; 762 763 /* 764 * strip off IPv6 scope identifier, since it is 765 * local to the node 766 */ 767 h = xstrdup(host); 768 if (isipv6addr(h) && 769 (p = strchr(h, '%')) != NULL) { 770 *p = '\0'; 771 } 772 fprintf(fin, "Host: [%s]", h); 773 free(h); 774 } else 775 fprintf(fin, "Host: %s", host); 776 if (portnum != HTTP_PORT) 777 fprintf(fin, ":%u", portnum); 778 fprintf(fin, "\r\n"); 779 fprintf(fin, "Accept: */*\r\n"); 780 fprintf(fin, "Connection: close\r\n"); 781 if (restart_point) { 782 fputs(leading, ttyout); 783 fprintf(fin, "Range: bytes=" LLF "-\r\n", 784 (LLT)restart_point); 785 fprintf(ttyout, "restarting at " LLF, 786 (LLT)restart_point); 787 leading = ", "; 788 hasleading++; 789 } 790 if (flushcache) 791 fprintf(fin, "Cache-Control: no-cache\r\n"); 792 } 793 if ((useragent=getenv("FTPUSERAGENT")) != NULL) { 794 fprintf(fin, "User-Agent: %s\r\n", useragent); 795 } else { 796 fprintf(fin, "User-Agent: %s/%s\r\n", 797 FTP_PRODUCT, FTP_VERSION); 798 } 799 if (wwwauth) { 800 if (verbose) { 801 fprintf(ttyout, "%swith authorization", 802 leading); 803 leading = ", "; 804 hasleading++; 805 } 806 fprintf(fin, "Authorization: %s\r\n", wwwauth); 807 } 808 if (proxyauth) { 809 if (verbose) { 810 fprintf(ttyout, 811 "%swith proxy authorization", leading); 812 leading = ", "; 813 hasleading++; 814 } 815 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 816 } 817 if (verbose && hasleading) 818 fputs(")\n", ttyout); 819 fprintf(fin, "\r\n"); 820 if (fflush(fin) == EOF) { 821 warn("Writing HTTP request"); 822 goto cleanup_fetch_url; 823 } 824 825 /* Read the response */ 826 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 827 warn("Receiving HTTP reply"); 828 goto cleanup_fetch_url; 829 } 830 while (len > 0 && (ISLWS(buf[len-1]))) 831 buf[--len] = '\0'; 832 if (debug) 833 fprintf(ttyout, "received `%s'\n", buf); 834 835 /* Determine HTTP response code */ 836 cp = strchr(buf, ' '); 837 if (cp == NULL) 838 goto improper; 839 else 840 cp++; 841 hcode = strtol(cp, &ep, 10); 842 if (*ep != '\0' && !isspace((unsigned char)*ep)) 843 goto improper; 844 message = xstrdup(cp); 845 846 /* Read the rest of the header. */ 847 while (1) { 848 FREEPTR(buf); 849 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 850 == NULL) { 851 warn("Receiving HTTP reply"); 852 goto cleanup_fetch_url; 853 } 854 while (len > 0 && (ISLWS(buf[len-1]))) 855 buf[--len] = '\0'; 856 if (len == 0) 857 break; 858 if (debug) 859 fprintf(ttyout, "received `%s'\n", buf); 860 861 /* 862 * Look for some headers 863 */ 864 865 cp = buf; 866 867 if (match_token(&cp, "Content-Length:")) { 868 filesize = STRTOLL(cp, &ep, 10); 869 if (filesize < 0 || *ep != '\0') 870 goto improper; 871 if (debug) 872 fprintf(ttyout, 873 "parsed len as: " LLF "\n", 874 (LLT)filesize); 875 876 } else if (match_token(&cp, "Content-Range:")) { 877 if (! match_token(&cp, "bytes")) 878 goto improper; 879 880 if (*cp == '*') 881 cp++; 882 else { 883 rangestart = STRTOLL(cp, &ep, 10); 884 if (rangestart < 0 || *ep != '-') 885 goto improper; 886 cp = ep + 1; 887 rangeend = STRTOLL(cp, &ep, 10); 888 if (rangeend < 0 || rangeend < rangestart) 889 goto improper; 890 cp = ep; 891 } 892 if (*cp != '/') 893 goto improper; 894 cp++; 895 if (*cp == '*') 896 cp++; 897 else { 898 entitylen = STRTOLL(cp, &ep, 10); 899 if (entitylen < 0) 900 goto improper; 901 cp = ep; 902 } 903 if (*cp != '\0') 904 goto improper; 905 906 if (debug) { 907 fprintf(ttyout, "parsed range as: "); 908 if (rangestart == -1) 909 fprintf(ttyout, "*"); 910 else 911 fprintf(ttyout, LLF "-" LLF, 912 (LLT)rangestart, 913 (LLT)rangeend); 914 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen); 915 } 916 if (! restart_point) { 917 warnx( 918 "Received unexpected Content-Range header"); 919 goto cleanup_fetch_url; 920 } 921 922 } else if (match_token(&cp, "Last-Modified:")) { 923 struct tm parsed; 924 char *t; 925 926 /* RFC 1123 */ 927 if ((t = strptime(cp, 928 "%a, %d %b %Y %H:%M:%S GMT", 929 &parsed)) 930 /* RFC 850 */ 931 || (t = strptime(cp, 932 "%a, %d-%b-%y %H:%M:%S GMT", 933 &parsed)) 934 /* asctime */ 935 || (t = strptime(cp, 936 "%a, %b %d %H:%M:%S %Y", 937 &parsed))) { 938 parsed.tm_isdst = -1; 939 if (*t == '\0') 940 mtime = timegm(&parsed); 941 if (debug && mtime != -1) { 942 fprintf(ttyout, 943 "parsed date as: %s", 944 ctime(&mtime)); 945 } 946 } 947 948 } else if (match_token(&cp, "Location:")) { 949 location = xstrdup(cp); 950 if (debug) 951 fprintf(ttyout, 952 "parsed location as `%s'\n", cp); 953 954 } else if (match_token(&cp, "Transfer-Encoding:")) { 955 if (match_token(&cp, "binary")) { 956 warnx( 957 "Bogus transfer encoding - `binary' (fetching anyway)"); 958 continue; 959 } 960 if (! (token = match_token(&cp, "chunked"))) { 961 warnx( 962 "Unsupported transfer encoding - `%s'", 963 token); 964 goto cleanup_fetch_url; 965 } 966 ischunked++; 967 if (debug) 968 fprintf(ttyout, 969 "using chunked encoding\n"); 970 971 } else if (match_token(&cp, "Proxy-Authenticate:") 972 || match_token(&cp, "WWW-Authenticate:")) { 973 if (! (token = match_token(&cp, "Basic"))) { 974 if (debug) 975 fprintf(ttyout, 976 "skipping unknown auth scheme `%s'\n", 977 token); 978 continue; 979 } 980 FREEPTR(auth); 981 auth = xstrdup(token); 982 if (debug) 983 fprintf(ttyout, 984 "parsed auth as `%s'\n", cp); 985 } 986 987 } 988 /* finished parsing header */ 989 FREEPTR(buf); 990 991 switch (hcode) { 992 case 200: 993 break; 994 case 206: 995 if (! restart_point) { 996 warnx("Not expecting partial content header"); 997 goto cleanup_fetch_url; 998 } 999 break; 1000 case 300: 1001 case 301: 1002 case 302: 1003 case 303: 1004 case 305: 1005 if (EMPTYSTRING(location)) { 1006 warnx( 1007 "No redirection Location provided by server"); 1008 goto cleanup_fetch_url; 1009 } 1010 if (redirect_loop++ > 5) { 1011 warnx("Too many redirections requested"); 1012 goto cleanup_fetch_url; 1013 } 1014 if (hcode == 305) { 1015 if (verbose) 1016 fprintf(ttyout, "Redirected via %s\n", 1017 location); 1018 rval = fetch_url(url, location, 1019 proxyauth, wwwauth); 1020 } else { 1021 if (verbose) 1022 fprintf(ttyout, "Redirected to %s\n", 1023 location); 1024 rval = go_fetch(location); 1025 } 1026 goto cleanup_fetch_url; 1027#ifndef NO_AUTH 1028 case 401: 1029 case 407: 1030 { 1031 char **authp; 1032 char *auser, *apass; 1033 1034 if (hcode == 401) { 1035 authp = &wwwauth; 1036 auser = user; 1037 apass = pass; 1038 } else { 1039 authp = &proxyauth; 1040 auser = puser; 1041 apass = ppass; 1042 } 1043 if (verbose || *authp == NULL || 1044 auser == NULL || apass == NULL) 1045 fprintf(ttyout, "%s\n", message); 1046 if (EMPTYSTRING(auth)) { 1047 warnx( 1048 "No authentication challenge provided by server"); 1049 goto cleanup_fetch_url; 1050 } 1051 if (*authp != NULL) { 1052 char reply[10]; 1053 1054 fprintf(ttyout, 1055 "Authorization failed. Retry (y/n)? "); 1056 if (fgets(reply, sizeof(reply), stdin) 1057 == NULL) { 1058 clearerr(stdin); 1059 goto cleanup_fetch_url; 1060 } 1061 if (tolower((unsigned char)reply[0]) != 'y') 1062 goto cleanup_fetch_url; 1063 auser = NULL; 1064 apass = NULL; 1065 } 1066 if (auth_url(auth, authp, auser, apass) == 0) { 1067 rval = fetch_url(url, proxyenv, 1068 proxyauth, wwwauth); 1069 memset(*authp, 0, strlen(*authp)); 1070 FREEPTR(*authp); 1071 } 1072 goto cleanup_fetch_url; 1073 } 1074#endif 1075 default: 1076 if (message) 1077 warnx("Error retrieving file - `%s'", message); 1078 else 1079 warnx("Unknown error retrieving file"); 1080 goto cleanup_fetch_url; 1081 } 1082 } /* end of ftp:// or http:// specific setup */ 1083 1084 /* Open the output file. */ 1085 if (strcmp(savefile, "-") == 0) { 1086 fout = stdout; 1087 } else if (*savefile == '|') { 1088 oldintp = xsignal(SIGPIPE, SIG_IGN); 1089 fout = popen(savefile + 1, "w"); 1090 if (fout == NULL) { 1091 warn("Can't run `%s'", savefile + 1); 1092 goto cleanup_fetch_url; 1093 } 1094 closefunc = pclose; 1095 } else { 1096 if ((rangeend != -1 && rangeend <= restart_point) || 1097 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) { 1098 /* already done */ 1099 if (verbose) 1100 fprintf(ttyout, "already done\n"); 1101 rval = 0; 1102 goto cleanup_fetch_url; 1103 } 1104 if (restart_point && rangestart != -1) { 1105 if (entitylen != -1) 1106 filesize = entitylen; 1107 if (rangestart != restart_point) { 1108 warnx( 1109 "Size of `%s' differs from save file `%s'", 1110 url, savefile); 1111 goto cleanup_fetch_url; 1112 } 1113 fout = fopen(savefile, "a"); 1114 } else 1115 fout = fopen(savefile, "w"); 1116 if (fout == NULL) { 1117 warn("Can't open `%s'", savefile); 1118 goto cleanup_fetch_url; 1119 } 1120 closefunc = fclose; 1121 } 1122 1123 /* Trap signals */ 1124 if (sigsetjmp(httpabort, 1)) 1125 goto cleanup_fetch_url; 1126 (void)xsignal(SIGQUIT, psummary); 1127 oldintr = xsignal(SIGINT, aborthttp); 1128 1129 if (rcvbuf_size > bufsize) { 1130 if (xferbuf) 1131 (void)free(xferbuf); 1132 bufsize = rcvbuf_size; 1133 xferbuf = xmalloc(bufsize); 1134 } 1135 1136 bytes = 0; 1137 hashbytes = mark; 1138 progressmeter(-1); 1139 1140 /* Finally, suck down the file. */ 1141 do { 1142 long chunksize; 1143 1144 chunksize = 0; 1145 /* read chunksize */ 1146 if (ischunked) { 1147 if (fgets(xferbuf, bufsize, fin) == NULL) { 1148 warnx("Unexpected EOF reading chunksize"); 1149 goto cleanup_fetch_url; 1150 } 1151 chunksize = strtol(xferbuf, &ep, 16); 1152 1153 /* 1154 * XXX: Work around bug in Apache 1.3.9 and 1155 * 1.3.11, which incorrectly put trailing 1156 * space after the chunksize. 1157 */ 1158 while (*ep == ' ') 1159 ep++; 1160 1161 if (strcmp(ep, "\r\n") != 0) { 1162 warnx("Unexpected data following chunksize"); 1163 goto cleanup_fetch_url; 1164 } 1165 if (debug) 1166 fprintf(ttyout, "got chunksize of " LLF "\n", 1167 (LLT)chunksize); 1168 if (chunksize == 0) 1169 break; 1170 } 1171 /* transfer file or chunk */ 1172 while (1) { 1173 struct timeval then, now, td; 1174 off_t bufrem; 1175 1176 if (rate_get) 1177 (void)gettimeofday(&then, NULL); 1178 bufrem = rate_get ? rate_get : bufsize; 1179 if (ischunked) 1180 bufrem = MIN(chunksize, bufrem); 1181 while (bufrem > 0) { 1182 len = fread(xferbuf, sizeof(char), 1183 MIN(bufsize, bufrem), fin); 1184 if (len <= 0) 1185 goto chunkdone; 1186 bytes += len; 1187 bufrem -= len; 1188 if (fwrite(xferbuf, sizeof(char), len, fout) 1189 != len) { 1190 warn("Writing `%s'", savefile); 1191 goto cleanup_fetch_url; 1192 } 1193 if (hash && !progress) { 1194 while (bytes >= hashbytes) { 1195 (void)putc('#', ttyout); 1196 hashbytes += mark; 1197 } 1198 (void)fflush(ttyout); 1199 } 1200 if (ischunked) { 1201 chunksize -= len; 1202 if (chunksize <= 0) 1203 break; 1204 } 1205 } 1206 if (rate_get) { 1207 while (1) { 1208 (void)gettimeofday(&now, NULL); 1209 timersub(&now, &then, &td); 1210 if (td.tv_sec > 0) 1211 break; 1212 usleep(1000000 - td.tv_usec); 1213 } 1214 } 1215 if (ischunked && chunksize <= 0) 1216 break; 1217 } 1218 /* read CRLF after chunk*/ 1219 chunkdone: 1220 if (ischunked) { 1221 if (fgets(xferbuf, bufsize, fin) == NULL) 1222 break; 1223 if (strcmp(xferbuf, "\r\n") != 0) { 1224 warnx("Unexpected data following chunk"); 1225 goto cleanup_fetch_url; 1226 } 1227 } 1228 } while (ischunked); 1229 if (hash && !progress && bytes > 0) { 1230 if (bytes < mark) 1231 (void)putc('#', ttyout); 1232 (void)putc('\n', ttyout); 1233 } 1234 if (ferror(fin)) { 1235 warn("Reading file"); 1236 goto cleanup_fetch_url; 1237 } 1238 progressmeter(1); 1239 (void)fflush(fout); 1240 if (closefunc == fclose && mtime != -1) { 1241 struct timeval tval[2]; 1242 1243 (void)gettimeofday(&tval[0], NULL); 1244 tval[1].tv_sec = mtime; 1245 tval[1].tv_usec = 0; 1246 (*closefunc)(fout); 1247 fout = NULL; 1248 1249 if (utimes(savefile, tval) == -1) { 1250 fprintf(ttyout, 1251 "Can't change modification time to %s", 1252 asctime(localtime(&mtime))); 1253 } 1254 } 1255 if (bytes > 0) 1256 ptransfer(0); 1257 bytes = 0; 1258 1259 rval = 0; 1260 goto cleanup_fetch_url; 1261 1262 improper: 1263 warnx("Improper response from `%s'", host); 1264 1265 cleanup_fetch_url: 1266 if (oldintr) 1267 (void)xsignal(SIGINT, oldintr); 1268 if (oldintp) 1269 (void)xsignal(SIGPIPE, oldintp); 1270 if (fin != NULL) 1271 fclose(fin); 1272 else if (s != -1) 1273 close(s); 1274 if (closefunc != NULL && fout != NULL) 1275 (*closefunc)(fout); 1276 if (res0) 1277 freeaddrinfo(res0); 1278 FREEPTR(savefile); 1279 FREEPTR(user); 1280 FREEPTR(pass); 1281 FREEPTR(host); 1282 FREEPTR(port); 1283 FREEPTR(path); 1284 FREEPTR(decodedpath); 1285 FREEPTR(puser); 1286 FREEPTR(ppass); 1287 FREEPTR(buf); 1288 FREEPTR(auth); 1289 FREEPTR(location); 1290 FREEPTR(message); 1291 return (rval); 1292} 1293 1294/* 1295 * Abort a HTTP retrieval 1296 */ 1297void 1298aborthttp(int notused) 1299{ 1300 char msgbuf[100]; 1301 int len; 1302 1303 sigint_raised = 1; 1304 alarmtimer(0); 1305 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1306 write(fileno(ttyout), msgbuf, len); 1307 siglongjmp(httpabort, 1); 1308} 1309 1310/* 1311 * Retrieve ftp URL or classic ftp argument using FTP. 1312 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1313 * is still open (e.g, ftp xfer with trailing /) 1314 */ 1315static int 1316fetch_ftp(const char *url) 1317{ 1318 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1319 char *host, *path, *dir, *file, *user, *pass; 1320 char *port; 1321 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1322 in_port_t portnum; 1323 url_t urltype; 1324 1325 host = path = dir = file = user = pass = NULL; 1326 port = NULL; 1327 rval = 1; 1328 type = TYPE_I; 1329 1330 if (STRNEQUAL(url, FTP_URL)) { 1331 if ((parse_url(url, "URL", &urltype, &user, &pass, 1332 &host, &port, &portnum, &path) == -1) || 1333 (user != NULL && *user == '\0') || 1334 EMPTYSTRING(host)) { 1335 warnx("Invalid URL `%s'", url); 1336 goto cleanup_fetch_ftp; 1337 } 1338 /* 1339 * Note: Don't url_decode(path) here. We need to keep the 1340 * distinction between "/" and "%2F" until later. 1341 */ 1342 1343 /* check for trailing ';type=[aid]' */ 1344 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1345 if (strcasecmp(cp, ";type=a") == 0) 1346 type = TYPE_A; 1347 else if (strcasecmp(cp, ";type=i") == 0) 1348 type = TYPE_I; 1349 else if (strcasecmp(cp, ";type=d") == 0) { 1350 warnx( 1351 "Directory listing via a URL is not supported"); 1352 goto cleanup_fetch_ftp; 1353 } else { 1354 warnx("Invalid suffix `%s' in URL `%s'", cp, 1355 url); 1356 goto cleanup_fetch_ftp; 1357 } 1358 *cp = 0; 1359 } 1360 } else { /* classic style `[user@]host:[file]' */ 1361 urltype = CLASSIC_URL_T; 1362 host = xstrdup(url); 1363 cp = strchr(host, '@'); 1364 if (cp != NULL) { 1365 *cp = '\0'; 1366 user = host; 1367 anonftp = 0; /* disable anonftp */ 1368 host = xstrdup(cp + 1); 1369 } 1370 cp = strchr(host, ':'); 1371 if (cp != NULL) { 1372 *cp = '\0'; 1373 path = xstrdup(cp + 1); 1374 } 1375 } 1376 if (EMPTYSTRING(host)) 1377 goto cleanup_fetch_ftp; 1378 1379 /* Extract the file and (if present) directory name. */ 1380 dir = path; 1381 if (! EMPTYSTRING(dir)) { 1382 /* 1383 * If we are dealing with classic `[user@]host:[path]' syntax, 1384 * then a path of the form `/file' (resulting from input of the 1385 * form `host:/file') means that we should do "CWD /" before 1386 * retrieving the file. So we set dir="/" and file="file". 1387 * 1388 * But if we are dealing with URLs like `ftp://host/path' then 1389 * a path of the form `/file' (resulting from a URL of the form 1390 * `ftp://host//file') means that we should do `CWD ' (with an 1391 * empty argument) before retrieving the file. So we set 1392 * dir="" and file="file". 1393 * 1394 * If the path does not contain / at all, we set dir=NULL. 1395 * (We get a path without any slashes if we are dealing with 1396 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1397 * 1398 * In all other cases, we set dir to a string that does not 1399 * include the final '/' that separates the dir part from the 1400 * file part of the path. (This will be the empty string if 1401 * and only if we are dealing with a path of the form `/file' 1402 * resulting from an URL of the form `ftp://host//file'.) 1403 */ 1404 cp = strrchr(dir, '/'); 1405 if (cp == dir && urltype == CLASSIC_URL_T) { 1406 file = cp + 1; 1407 dir = "/"; 1408 } else if (cp != NULL) { 1409 *cp++ = '\0'; 1410 file = cp; 1411 } else { 1412 file = dir; 1413 dir = NULL; 1414 } 1415 } else 1416 dir = NULL; 1417 if (urltype == FTP_URL_T && file != NULL) { 1418 url_decode(file); 1419 /* but still don't url_decode(dir) */ 1420 } 1421 if (debug) 1422 fprintf(ttyout, 1423 "fetch_ftp: user `%s' pass `%s' host %s port %s " 1424 "path `%s' dir `%s' file `%s'\n", 1425 user ? user : "<null>", pass ? pass : "<null>", 1426 host ? host : "<null>", port ? port : "<null>", 1427 path ? path : "<null>", 1428 dir ? dir : "<null>", file ? file : "<null>"); 1429 1430 dirhasglob = filehasglob = 0; 1431 if (doglob && urltype == CLASSIC_URL_T) { 1432 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1433 dirhasglob = 1; 1434 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1435 filehasglob = 1; 1436 } 1437 1438 /* Set up the connection */ 1439 if (connected) 1440 disconnect(0, NULL); 1441 xargv[0] = (char *)getprogname(); /* XXX discards const */ 1442 xargv[1] = host; 1443 xargv[2] = NULL; 1444 xargc = 2; 1445 if (port) { 1446 xargv[2] = port; 1447 xargv[3] = NULL; 1448 xargc = 3; 1449 } 1450 oautologin = autologin; 1451 /* don't autologin in setpeer(), use ftp_login() below */ 1452 autologin = 0; 1453 setpeer(xargc, xargv); 1454 autologin = oautologin; 1455 if ((connected == 0) || 1456 (connected == 1 && !ftp_login(host, user, pass))) { 1457 warnx("Can't connect or login to host `%s'", host); 1458 goto cleanup_fetch_ftp; 1459 } 1460 1461 switch (type) { 1462 case TYPE_A: 1463 setascii(1, xargv); 1464 break; 1465 case TYPE_I: 1466 setbinary(1, xargv); 1467 break; 1468 default: 1469 errx(1, "fetch_ftp: unknown transfer type %d", type); 1470 } 1471 1472 /* 1473 * Change directories, if necessary. 1474 * 1475 * Note: don't use EMPTYSTRING(dir) below, because 1476 * dir=="" means something different from dir==NULL. 1477 */ 1478 if (dir != NULL && !dirhasglob) { 1479 char *nextpart; 1480 1481 /* 1482 * If we are dealing with a classic `[user@]host:[path]' 1483 * (urltype is CLASSIC_URL_T) then we have a raw directory 1484 * name (not encoded in any way) and we can change 1485 * directories in one step. 1486 * 1487 * If we are dealing with an `ftp://host/path' URL 1488 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1489 * send a separate CWD command for each unescaped "/" 1490 * in the path, and we have to interpret %hex escaping 1491 * *after* we find the slashes. It's possible to get 1492 * empty components here, (from multiple adjacent 1493 * slashes in the path) and RFC 1738 says that we should 1494 * still do `CWD ' (with a null argument) in such cases. 1495 * 1496 * Many ftp servers don't support `CWD ', so if there's an 1497 * error performing that command, bail out with a descriptive 1498 * message. 1499 * 1500 * Examples: 1501 * 1502 * host: dir="", urltype=CLASSIC_URL_T 1503 * logged in (to default directory) 1504 * host:file dir=NULL, urltype=CLASSIC_URL_T 1505 * "RETR file" 1506 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1507 * "CWD dir", logged in 1508 * ftp://host/ dir="", urltype=FTP_URL_T 1509 * logged in (to default directory) 1510 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1511 * "CWD dir", logged in 1512 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1513 * "RETR file" 1514 * ftp://host//file dir="", urltype=FTP_URL_T 1515 * "CWD ", "RETR file" 1516 * host:/file dir="/", urltype=CLASSIC_URL_T 1517 * "CWD /", "RETR file" 1518 * ftp://host///file dir="/", urltype=FTP_URL_T 1519 * "CWD ", "CWD ", "RETR file" 1520 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1521 * "CWD /", "RETR file" 1522 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1523 * "CWD foo", "RETR file" 1524 * ftp://host/foo/bar/file dir="foo/bar" 1525 * "CWD foo", "CWD bar", "RETR file" 1526 * ftp://host//foo/bar/file dir="/foo/bar" 1527 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1528 * ftp://host/foo//bar/file dir="foo//bar" 1529 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1530 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1531 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1532 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1533 * "CWD /foo", "CWD bar", "RETR file" 1534 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1535 * "CWD /foo/bar", "RETR file" 1536 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1537 * "RETR /foo/bar/file" 1538 * 1539 * Note that we don't need `dir' after this point. 1540 */ 1541 do { 1542 if (urltype == FTP_URL_T) { 1543 nextpart = strchr(dir, '/'); 1544 if (nextpart) { 1545 *nextpart = '\0'; 1546 nextpart++; 1547 } 1548 url_decode(dir); 1549 } else 1550 nextpart = NULL; 1551 if (debug) 1552 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1553 dir ? dir : "<null>", 1554 nextpart ? nextpart : "<null>"); 1555 if (urltype == FTP_URL_T || *dir != '\0') { 1556 xargv[0] = "cd"; 1557 xargv[1] = dir; 1558 xargv[2] = NULL; 1559 dirchange = 0; 1560 cd(2, xargv); 1561 if (! dirchange) { 1562 if (*dir == '\0' && code == 500) 1563 fprintf(stderr, 1564"\n" 1565"ftp: The `CWD ' command (without a directory), which is required by\n" 1566" RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1567" conflicts with the server's conformance to RFC 959.\n" 1568" Try the same URL without the `//' in the URL pathname.\n" 1569"\n"); 1570 goto cleanup_fetch_ftp; 1571 } 1572 } 1573 dir = nextpart; 1574 } while (dir != NULL); 1575 } 1576 1577 if (EMPTYSTRING(file)) { 1578 rval = -1; 1579 goto cleanup_fetch_ftp; 1580 } 1581 1582 if (dirhasglob) { 1583 (void)strlcpy(rempath, dir, sizeof(rempath)); 1584 (void)strlcat(rempath, "/", sizeof(rempath)); 1585 (void)strlcat(rempath, file, sizeof(rempath)); 1586 file = rempath; 1587 } 1588 1589 /* Fetch the file(s). */ 1590 xargc = 2; 1591 xargv[0] = "get"; 1592 xargv[1] = file; 1593 xargv[2] = NULL; 1594 if (dirhasglob || filehasglob) { 1595 int ointeractive; 1596 1597 ointeractive = interactive; 1598 interactive = 0; 1599 if (restartautofetch) 1600 xargv[0] = "mreget"; 1601 else 1602 xargv[0] = "mget"; 1603 mget(xargc, xargv); 1604 interactive = ointeractive; 1605 } else { 1606 if (outfile == NULL) { 1607 cp = strrchr(file, '/'); /* find savefile */ 1608 if (cp != NULL) 1609 outfile = cp + 1; 1610 else 1611 outfile = file; 1612 } 1613 xargv[2] = (char *)outfile; 1614 xargv[3] = NULL; 1615 xargc++; 1616 if (restartautofetch) 1617 reget(xargc, xargv); 1618 else 1619 get(xargc, xargv); 1620 } 1621 1622 if ((code / 100) == COMPLETE) 1623 rval = 0; 1624 1625 cleanup_fetch_ftp: 1626 FREEPTR(host); 1627 FREEPTR(path); 1628 FREEPTR(user); 1629 FREEPTR(pass); 1630 return (rval); 1631} 1632 1633/* 1634 * Retrieve the given file to outfile. 1635 * Supports arguments of the form: 1636 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1637 * call fetch_ftp() 1638 * "http://host/path" call fetch_url() to use HTTP 1639 * "file:///path" call fetch_url() to copy 1640 * "about:..." print a message 1641 * 1642 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1643 * is still open (e.g, ftp xfer with trailing /) 1644 */ 1645static int 1646go_fetch(const char *url) 1647{ 1648 char *proxy; 1649 1650#ifndef NO_ABOUT 1651 /* 1652 * Check for about:* 1653 */ 1654 if (STRNEQUAL(url, ABOUT_URL)) { 1655 url += sizeof(ABOUT_URL) -1; 1656 if (strcasecmp(url, "ftp") == 0 || 1657 strcasecmp(url, "tnftp") == 0) { 1658 fputs( 1659"This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 1660"for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1661 } else if (strcasecmp(url, "lukem") == 0) { 1662 fputs( 1663"Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1664"Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 1665 } else if (strcasecmp(url, "netbsd") == 0) { 1666 fputs( 1667"NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1668"For more information, see http://www.NetBSD.org/\n", ttyout); 1669 } else if (strcasecmp(url, "version") == 0) { 1670 fprintf(ttyout, "Version: %s %s%s\n", 1671 FTP_PRODUCT, FTP_VERSION, 1672#ifdef INET6 1673 "" 1674#else 1675 " (-IPv6)" 1676#endif 1677 ); 1678 } else { 1679 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1680 } 1681 fputs("\n", ttyout); 1682 return (0); 1683 } 1684#endif 1685 1686 /* 1687 * Check for file:// and http:// URLs. 1688 */ 1689 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL)) 1690 return (fetch_url(url, NULL, NULL, NULL)); 1691 1692 /* 1693 * Try FTP URL-style and host:file arguments next. 1694 * If ftpproxy is set with an FTP URL, use fetch_url() 1695 * Othewise, use fetch_ftp(). 1696 */ 1697 proxy = getoptionvalue("ftp_proxy"); 1698 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL)) 1699 return (fetch_url(url, NULL, NULL, NULL)); 1700 1701 return (fetch_ftp(url)); 1702} 1703 1704/* 1705 * Retrieve multiple files from the command line, 1706 * calling go_fetch() for each file. 1707 * 1708 * If an ftp path has a trailing "/", the path will be cd-ed into and 1709 * the connection remains open, and the function will return -1 1710 * (to indicate the connection is alive). 1711 * If an error occurs the return value will be the offset+1 in 1712 * argv[] of the file that caused a problem (i.e, argv[x] 1713 * returns x+1) 1714 * Otherwise, 0 is returned if all files retrieved successfully. 1715 */ 1716int 1717auto_fetch(int argc, char *argv[]) 1718{ 1719 volatile int argpos; 1720 int rval; 1721 1722 argpos = 0; 1723 1724 if (sigsetjmp(toplevel, 1)) { 1725 if (connected) 1726 disconnect(0, NULL); 1727 if (rval > 0) 1728 rval = argpos + 1; 1729 return (rval); 1730 } 1731 (void)xsignal(SIGINT, intr); 1732 (void)xsignal(SIGPIPE, lostpeer); 1733 1734 /* 1735 * Loop through as long as there's files to fetch. 1736 */ 1737 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1738 if (strchr(argv[argpos], ':') == NULL) 1739 break; 1740 redirect_loop = 0; 1741 if (!anonftp) 1742 anonftp = 2; /* Handle "automatic" transfers. */ 1743 rval = go_fetch(argv[argpos]); 1744 if (outfile != NULL && strcmp(outfile, "-") != 0 1745 && outfile[0] != '|') 1746 outfile = NULL; 1747 if (rval > 0) 1748 rval = argpos + 1; 1749 } 1750 1751 if (connected && rval != -1) 1752 disconnect(0, NULL); 1753 return (rval); 1754} 1755 1756 1757int 1758auto_put(int argc, char **argv, const char *uploadserver) 1759{ 1760 char *uargv[4], *path, *pathsep; 1761 int uargc, rval, len; 1762 1763 uargc = 0; 1764 uargv[uargc++] = "mput"; 1765 uargv[uargc++] = argv[0]; 1766 uargv[2] = uargv[3] = NULL; 1767 pathsep = NULL; 1768 rval = 1; 1769 1770 if (debug) 1771 fprintf(ttyout, "auto_put: target `%s'\n", uploadserver); 1772 1773 path = xstrdup(uploadserver); 1774 len = strlen(path); 1775 if (path[len - 1] != '/' && path[len - 1] != ':') { 1776 /* 1777 * make sure we always pass a directory to auto_fetch 1778 */ 1779 if (argc > 1) { /* more than one file to upload */ 1780 int len; 1781 1782 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 1783 free(path); 1784 path = (char *)xmalloc(len); 1785 (void)strlcpy(path, uploadserver, len); 1786 (void)strlcat(path, "/", len); 1787 } else { /* single file to upload */ 1788 uargv[0] = "put"; 1789 pathsep = strrchr(path, '/'); 1790 if (pathsep == NULL) { 1791 pathsep = strrchr(path, ':'); 1792 if (pathsep == NULL) { 1793 warnx("Invalid URL `%s'", path); 1794 goto cleanup_auto_put; 1795 } 1796 pathsep++; 1797 uargv[2] = xstrdup(pathsep); 1798 pathsep[0] = '/'; 1799 } else 1800 uargv[2] = xstrdup(pathsep + 1); 1801 pathsep[1] = '\0'; 1802 uargc++; 1803 } 1804 } 1805 if (debug) 1806 fprintf(ttyout, "auto_put: URL `%s' argv[2] `%s'\n", 1807 path, uargv[2] ? uargv[2] : "<null>"); 1808 1809 /* connect and cwd */ 1810 rval = auto_fetch(1, &path); 1811 free(path); 1812 if(rval >= 0) 1813 goto cleanup_auto_put; 1814 1815 /* XXX : is this the best way? */ 1816 if (uargc == 3) { 1817 uargv[1] = argv[0]; 1818 put(uargc, uargv); 1819 goto cleanup_auto_put; 1820 } 1821 1822 for(; argv[0] != NULL; argv++) { 1823 uargv[1] = argv[0]; 1824 mput(uargc, uargv); 1825 } 1826 rval = 0; 1827 1828 cleanup_auto_put: 1829 FREEPTR(uargv[2]); 1830 return (rval); 1831} 1832