fetch.c revision 1.94
1 /* $NetBSD: fetch.c,v 1.94 1999/11/09 22:03:49 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-1999 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 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: fetch.c,v 1.94 1999/11/09 22:03:49 lukem Exp $"); 42 #endif /* not lint */ 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 <util.h> 70 71 #include "ftp_var.h" 72 73 typedef enum { 74 UNKNOWN_URL_T=-1, 75 HTTP_URL_T, 76 FTP_URL_T, 77 FILE_URL_T, 78 CLASSIC_URL_T 79 } url_t; 80 81 void aborthttp __P((int)); 82 static int auth_url __P((const char *, char **, const char *, 83 const char *)); 84 static void base64_encode __P((const char *, size_t, char *)); 85 static int go_fetch __P((const char *)); 86 static int fetch_ftp __P((const char *)); 87 static int fetch_url __P((const char *, const char *, char *, char *)); 88 static int parse_url __P((const char *, const char *, url_t *, char **, 89 char **, char **, char **, in_port_t *, 90 char **)); 91 static void url_decode __P((char *)); 92 93 static int redirect_loop; 94 95 96 #define ABOUT_URL "about:" /* propaganda */ 97 #define FILE_URL "file://" /* file URL prefix */ 98 #define FTP_URL "ftp://" /* ftp URL prefix */ 99 #define HTTP_URL "http://" /* http URL prefix */ 100 101 102 /* 103 * Generate authorization response based on given authentication challenge. 104 * Returns -1 if an error occurred, otherwise 0. 105 * Sets response to a malloc(3)ed string; caller should free. 106 */ 107 static int 108 auth_url(challenge, response, guser, gpass) 109 const char *challenge; 110 char **response; 111 const char *guser; 112 const char *gpass; 113 { 114 char *cp, *ep, *clear, *line, *realm, *scheme; 115 char user[BUFSIZ], *pass; 116 int rval; 117 size_t len, clen, rlen; 118 119 *response = NULL; 120 clear = realm = scheme = NULL; 121 rval = -1; 122 line = xstrdup(challenge); 123 cp = line; 124 125 if (debug) 126 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 127 128 scheme = strsep(&cp, " "); 129 #define SCHEME_BASIC "Basic" 130 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 131 warnx("Unsupported WWW Authentication challenge - `%s'", 132 challenge); 133 goto cleanup_auth_url; 134 } 135 cp += strspn(cp, " "); 136 137 #define REALM "realm=\"" 138 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 139 cp += sizeof(REALM) - 1; 140 else { 141 warnx("Unsupported WWW Authentication challenge - `%s'", 142 challenge); 143 goto cleanup_auth_url; 144 } 145 if ((ep = strchr(cp, '\"')) != NULL) { 146 size_t len = ep - cp; 147 148 realm = (char *)xmalloc(len + 1); 149 (void)strlcpy(realm, cp, len + 1); 150 } else { 151 warnx("Unsupported WWW Authentication challenge - `%s'", 152 challenge); 153 goto cleanup_auth_url; 154 } 155 156 if (guser != NULL) 157 (void)strlcpy(user, guser, sizeof(user)); 158 else { 159 fprintf(ttyout, "Username for `%s': ", realm); 160 (void)fflush(ttyout); 161 if (fgets(user, sizeof(user) - 1, stdin) == NULL) { 162 clearerr(stdin); 163 goto cleanup_auth_url; 164 } 165 user[strlen(user) - 1] = '\0'; 166 } 167 if (gpass != NULL) 168 pass = (char *)gpass; 169 else 170 pass = getpass("Password: "); 171 172 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 173 clear = (char *)xmalloc(clen); 174 (void)strlcpy(clear, user, clen); 175 (void)strlcat(clear, ":", clen); 176 (void)strlcat(clear, pass, clen); 177 if (gpass == NULL) 178 memset(pass, 0, strlen(pass)); 179 180 /* scheme + " " + enc + "\0" */ 181 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 182 *response = (char *)xmalloc(rlen); 183 (void)strlcpy(*response, scheme, rlen); 184 len = strlcat(*response, " ", rlen); 185 base64_encode(clear, clen, *response + len); 186 memset(clear, 0, clen); 187 rval = 0; 188 189 cleanup_auth_url: 190 FREEPTR(clear); 191 FREEPTR(line); 192 FREEPTR(realm); 193 return (rval); 194 } 195 196 /* 197 * Encode len bytes starting at clear using base64 encoding into encoded, 198 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 199 */ 200 void 201 base64_encode(clear, len, encoded) 202 const char *clear; 203 size_t len; 204 char *encoded; 205 { 206 static const char enc[] = 207 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 208 char *cp; 209 int i; 210 211 cp = encoded; 212 for (i = 0; i < len; i += 3) { 213 *(cp++) = enc[((clear[i + 0] >> 2))]; 214 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 215 | ((clear[i + 1] >> 4) & 0x0f)]; 216 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 217 | ((clear[i + 2] >> 6) & 0x03)]; 218 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 219 } 220 *cp = '\0'; 221 while (i-- > len) 222 *(--cp) = '='; 223 } 224 225 /* 226 * Decode %xx escapes in given string, `in-place'. 227 */ 228 static void 229 url_decode(url) 230 char *url; 231 { 232 unsigned char *p, *q; 233 234 if (EMPTYSTRING(url)) 235 return; 236 p = q = (unsigned char *)url; 237 238 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 239 while (*p) { 240 if (p[0] == '%' 241 && p[1] && isxdigit((unsigned char)p[1]) 242 && p[2] && isxdigit((unsigned char)p[2])) { 243 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 244 p+=3; 245 } else 246 *q++ = *p++; 247 } 248 *q = '\0'; 249 } 250 251 252 /* 253 * Parse URL of form: 254 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 255 * Returns -1 if a parse error occurred, otherwise 0. 256 * It's the caller's responsibility to url_decode() the returned 257 * user, pass and path. 258 * 259 * Sets type to url_t, each of the given char ** pointers to a 260 * malloc(3)ed strings of the relevant section, and port to 261 * the number given, or ftpport if ftp://, or httpport if http://. 262 * 263 * If <host> is surrounded by `[' and ']', it's parsed as an 264 * IPv6 address (as per draft-ietf-ipngwg-url-literal-01.txt). 265 * 266 * XXX: this is not totally RFC 1738 compliant; <path> will have the 267 * leading `/' unless it's an ftp:// URL, as this makes things easier 268 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 269 * host and the url-path removed, but any additional leading slashes 270 * in the url-path are retained (because they imply that we should 271 * later do "CWD" with a null argument). 272 * 273 * Examples: 274 * input url output path 275 * --------- ----------- 276 * "ftp://host" NULL 277 * "http://host/" NULL 278 * "file://host/dir/file" "dir/file" 279 * "ftp://host/" "" 280 * "ftp://host//" NULL 281 * "ftp://host//dir/file" "/dir/file" 282 */ 283 static int 284 parse_url(url, desc, type, user, pass, host, port, portnum, path) 285 const char *url; 286 const char *desc; 287 url_t *type; 288 char **user; 289 char **pass; 290 char **host; 291 char **port; 292 in_port_t *portnum; 293 char **path; 294 { 295 const char *origurl; 296 char *cp, *ep, *thost, *tport; 297 size_t len; 298 299 if (url == NULL || desc == NULL || type == NULL || user == NULL 300 || pass == NULL || host == NULL || port == NULL || portnum == NULL 301 || path == NULL) 302 errx(1, "parse_url: invoked with NULL argument!"); 303 304 origurl = url; 305 *type = UNKNOWN_URL_T; 306 *user = *pass = *host = *port = *path = NULL; 307 *portnum = 0; 308 tport = NULL; 309 310 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 311 url += sizeof(HTTP_URL) - 1; 312 *type = HTTP_URL_T; 313 *portnum = HTTP_PORT; 314 tport = httpport; 315 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 316 url += sizeof(FTP_URL) - 1; 317 *type = FTP_URL_T; 318 *portnum = FTP_PORT; 319 tport = ftpport; 320 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 321 url += sizeof(FILE_URL) - 1; 322 *type = FILE_URL_T; 323 } else { 324 warnx("Invalid %s `%s'", desc, url); 325 cleanup_parse_url: 326 FREEPTR(*user); 327 FREEPTR(*pass); 328 FREEPTR(*host); 329 FREEPTR(*port); 330 FREEPTR(*path); 331 return (-1); 332 } 333 334 if (*url == '\0') 335 return (0); 336 337 /* find [user[:pass]@]host[:port] */ 338 ep = strchr(url, '/'); 339 if (ep == NULL) 340 thost = xstrdup(url); 341 else { 342 len = ep - url; 343 thost = (char *)xmalloc(len + 1); 344 (void)strlcpy(thost, url, len + 1); 345 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 346 ep++; 347 *path = xstrdup(ep); 348 } 349 350 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 351 if (cp != NULL) { 352 if (*type == FTP_URL_T) 353 anonftp = 0; /* disable anonftp */ 354 *user = thost; 355 *cp = '\0'; 356 thost = xstrdup(cp + 1); 357 cp = strchr(*user, ':'); 358 if (cp != NULL) { 359 *cp = '\0'; 360 *pass = xstrdup(cp + 1); 361 } 362 } 363 364 #ifdef INET6 365 /* 366 * Check if thost is an encoded IPv6 address, as per 367 * draft-ietf-ipngwg-url-literal-01.txt: 368 * `[' ipv6-address ']' 369 */ 370 if (*thost == '[') { 371 cp = thost + 1; 372 if ((ep = strchr(cp, ']')) == NULL || 373 (ep[1] != '\0' && ep[1] != '\0')) { 374 warnx("Invalid address `%s' in %s `%s'", 375 thost, desc, origurl); 376 goto cleanup_parse_url; 377 } 378 len = ep - cp; /* change `[xxx]' -> `xxx' */ 379 memmove(thost, thost + 1, len); 380 thost[len] = '\0'; 381 if (! isipv6addr(thost)) { 382 warnx("Invalid IPv6 address `%s' in %s `%s'", 383 thost, desc, origurl); 384 goto cleanup_parse_url; 385 } 386 cp = ep + 1; 387 if (*cp == ':') 388 cp++; 389 else 390 cp = NULL; 391 } else 392 #endif /* INET6 */ 393 if ((cp = strchr(thost, ':')) != NULL) 394 *cp++ = '\0'; 395 *host = thost; 396 397 /* look for [:port] */ 398 if (cp != NULL) { 399 long nport; 400 401 nport = strtol(cp, &ep, 10); 402 if (*ep != '\0' && ep == cp) { 403 struct servent *svp; 404 405 svp = getservbyname(cp, "tcp"); 406 if (svp == NULL) { 407 warnx("Unknown port `%s' in %s `%s'", 408 cp, desc, origurl); 409 goto cleanup_parse_url; 410 } else 411 nport = ntohs(svp->s_port); 412 } else if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 413 warnx("Invalid port `%s' in %s `%s'", cp, desc, 414 origurl); 415 goto cleanup_parse_url; 416 } 417 *portnum = nport; 418 tport = cp; 419 } 420 421 if (tport != NULL); 422 *port = xstrdup(tport); 423 if (*path == NULL) 424 *path = xstrdup(""); 425 426 if (debug) 427 fprintf(ttyout, 428 "parse_url: user `%s' pass `%s' host %s:%s(%d) path `%s'\n", 429 *user ? *user : "<null>", *pass ? *pass : "<null>", 430 *host ? *host : "<null>", *port ? *port : "<null>", 431 *portnum ? *portnum : -1, *path ? *path : "<null>"); 432 433 return (0); 434 } 435 436 sigjmp_buf httpabort; 437 438 /* 439 * Retrieve URL, via a proxy if necessary, using HTTP. 440 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 441 * http_proxy as appropriate. 442 * Supports HTTP redirects. 443 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 444 * is still open (e.g, ftp xfer with trailing /) 445 */ 446 static int 447 fetch_url(url, proxyenv, proxyauth, wwwauth) 448 const char *url; 449 const char *proxyenv; 450 char *proxyauth; 451 char *wwwauth; 452 { 453 #ifdef NI_NUMERICHOST 454 struct addrinfo hints, *res = NULL; 455 int error; 456 #else 457 struct sockaddr_in sin; 458 struct hostent *hp = NULL; 459 #endif 460 volatile sig_t oldintr, oldintp; 461 volatile int s; 462 int ischunked, isproxy, rval, hcode; 463 size_t len; 464 static size_t bufsize; 465 static char *xferbuf; 466 char *cp, *ep, *buf, *savefile; 467 char *auth, *location, *message; 468 char *user, *pass, *host, *port, *path, *decodedpath; 469 char *puser, *ppass; 470 off_t hashbytes; 471 int (*closefunc) __P((FILE *)); 472 FILE *fin, *fout; 473 time_t mtime; 474 url_t urltype; 475 in_port_t portnum; 476 477 oldintr = oldintp = NULL; 478 closefunc = NULL; 479 fin = fout = NULL; 480 s = -1; 481 buf = savefile = NULL; 482 auth = location = message = NULL; 483 ischunked = isproxy = hcode = 0; 484 rval = 1; 485 user = pass = host = path = decodedpath = puser = ppass = NULL; 486 487 #ifdef __GNUC__ /* shut up gcc warnings */ 488 (void)&closefunc; 489 (void)&fin; 490 (void)&fout; 491 (void)&buf; 492 (void)&savefile; 493 (void)&rval; 494 (void)&isproxy; 495 (void)&hcode; 496 (void)&ischunked; 497 (void)&message; 498 (void)&location; 499 (void)&auth; 500 (void)&decodedpath; 501 #endif 502 503 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 504 &portnum, &path) == -1) 505 goto cleanup_fetch_url; 506 507 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 508 && strcasecmp(host, "localhost") != 0) { 509 warnx("No support for non local file URL `%s'", url); 510 goto cleanup_fetch_url; 511 } 512 513 if (EMPTYSTRING(path)) { 514 if (urltype == FTP_URL_T) { 515 rval = fetch_ftp(url); 516 goto cleanup_fetch_url; 517 } 518 if (urltype != HTTP_URL_T || outfile == NULL) { 519 warnx("Invalid URL (no file after host) `%s'", url); 520 goto cleanup_fetch_url; 521 } 522 } 523 524 decodedpath = xstrdup(path); 525 url_decode(decodedpath); 526 527 if (outfile) 528 savefile = xstrdup(outfile); 529 else { 530 cp = strrchr(decodedpath, '/'); /* find savefile */ 531 if (cp != NULL) 532 savefile = xstrdup(cp + 1); 533 else 534 savefile = xstrdup(decodedpath); 535 } 536 if (EMPTYSTRING(savefile)) { 537 if (urltype == FTP_URL_T) { 538 rval = fetch_ftp(url); 539 goto cleanup_fetch_url; 540 } 541 warnx("Invalid URL (no file after directory) `%s'", url); 542 goto cleanup_fetch_url; 543 } else { 544 if (debug) 545 fprintf(ttyout, "got savefile as `%s'\n", savefile); 546 } 547 548 filesize = -1; 549 mtime = -1; 550 if (urltype == FILE_URL_T) { /* file:// URLs */ 551 struct stat sb; 552 553 direction = "copied"; 554 fin = fopen(decodedpath, "r"); 555 if (fin == NULL) { 556 warn("Cannot open file `%s'", decodedpath); 557 goto cleanup_fetch_url; 558 } 559 if (fstat(fileno(fin), &sb) == 0) { 560 mtime = sb.st_mtime; 561 filesize = sb.st_size; 562 } 563 if (verbose) 564 fprintf(ttyout, "Copying %s\n", decodedpath); 565 } else { /* ftp:// or http:// URLs */ 566 char *leading; 567 int hasleading; 568 569 if (proxyenv == NULL) { 570 if (urltype == HTTP_URL_T) 571 proxyenv = getoptionvalue("http_proxy"); 572 else if (urltype == FTP_URL_T) 573 proxyenv = getoptionvalue("ftp_proxy"); 574 } 575 direction = "retrieved"; 576 if (! EMPTYSTRING(proxyenv)) { /* use proxy */ 577 url_t purltype; 578 char *phost, *ppath; 579 char *pport, *no_proxy; 580 581 isproxy = 1; 582 583 /* check URL against list of no_proxied sites */ 584 no_proxy = getoptionvalue("no_proxy"); 585 if (! EMPTYSTRING(no_proxy)) { 586 char *np, *np_copy; 587 long np_port; 588 size_t hlen, plen; 589 590 np_copy = xstrdup(no_proxy); 591 hlen = strlen(host); 592 while ((cp = strsep(&np_copy, " ,")) != NULL) { 593 if (*cp == '\0') 594 continue; 595 if ((np = strrchr(cp, ':')) != NULL) { 596 *np = '\0'; 597 np_port = 598 strtol(np + 1, &ep, 10); 599 if (*ep != '\0') 600 continue; 601 if (np_port != portnum) 602 continue; 603 } 604 plen = strlen(cp); 605 if (strncasecmp(host + hlen - plen, 606 cp, plen) == 0) { 607 isproxy = 0; 608 break; 609 } 610 } 611 FREEPTR(np_copy); 612 } 613 614 if (isproxy) { 615 if (parse_url(proxyenv, "proxy URL", &purltype, 616 &puser, &ppass, &phost, &pport, &portnum, 617 &ppath) == -1) 618 goto cleanup_fetch_url; 619 620 if ((purltype != HTTP_URL_T 621 && purltype != FTP_URL_T) || 622 EMPTYSTRING(phost) || 623 (! EMPTYSTRING(ppath) 624 && strcmp(ppath, "/") != 0)) { 625 warnx("Malformed proxy URL `%s'", 626 proxyenv); 627 FREEPTR(phost); 628 FREEPTR(pport); 629 FREEPTR(ppath); 630 goto cleanup_fetch_url; 631 } 632 633 FREEPTR(host); 634 host = phost; 635 FREEPTR(port); 636 port = pport; 637 FREEPTR(path); 638 path = xstrdup(url); 639 FREEPTR(ppath); 640 } 641 } /* ! EMPTYSTRING(proxyenv) */ 642 643 #ifndef NI_NUMERICHOST 644 memset(&sin, 0, sizeof(sin)); 645 sin.sin_family = AF_INET; 646 647 if (isdigit((unsigned char)host[0])) { 648 if (inet_aton(host, &sin.sin_addr) == 0) { 649 warnx("Invalid IP address `%s'", host); 650 goto cleanup_fetch_url; 651 } 652 } else { 653 hp = gethostbyname(host); 654 if (hp == NULL) { 655 warnx("%s: %s", host, hstrerror(h_errno)); 656 goto cleanup_fetch_url; 657 } 658 if (hp->h_addrtype != AF_INET) { 659 warnx("`%s': not an Internet address?", host); 660 goto cleanup_fetch_url; 661 } 662 if (hp->h_length > sizeof(sin.sin_addr)) 663 hp->h_length = sizeof(sin.sin_addr); 664 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 665 } 666 sin.sin_port = htons(portnum); 667 668 s = socket(AF_INET, SOCK_STREAM, 0); 669 if (s == -1) { 670 warn("Can't create socket"); 671 goto cleanup_fetch_url; 672 } 673 674 while (xconnect(s, (struct sockaddr *)&sin, 675 sizeof(sin)) == -1) { 676 if (errno == EINTR) 677 continue; 678 if (hp && hp->h_addr_list[1]) { 679 int oerrno = errno; 680 char *ia; 681 682 ia = inet_ntoa(sin.sin_addr); 683 errno = oerrno; 684 warn("Connect to address `%s'", ia); 685 hp->h_addr_list++; 686 memcpy(&sin.sin_addr, hp->h_addr_list[0], 687 (size_t)hp->h_length); 688 if (verbose) 689 fprintf(ttyout, "Trying %s...\n", 690 inet_ntoa(sin.sin_addr)); 691 (void)close(s); 692 s = socket(AF_INET, SOCK_STREAM, 0); 693 if (s < 0) { 694 warn("Can't create socket"); 695 goto cleanup_fetch_url; 696 } 697 continue; 698 } 699 warn("Can't connect to `%s'", host); 700 goto cleanup_fetch_url; 701 } 702 #else 703 memset(&hints, 0, sizeof(hints)); 704 hints.ai_flags = 0; 705 hints.ai_family = AF_UNSPEC; 706 hints.ai_socktype = SOCK_STREAM; 707 hints.ai_protocol = 0; 708 error = getaddrinfo(host, port, &hints, &res); 709 if (error) { 710 warnx(gai_strerror(error)); 711 goto cleanup_fetch_url; 712 } 713 714 while (1) { 715 s = socket(res->ai_family, 716 res->ai_socktype, res->ai_protocol); 717 if (s < 0) { 718 warn("Can't create socket"); 719 goto cleanup_fetch_url; 720 } 721 722 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 723 char hbuf[MAXHOSTNAMELEN]; 724 getnameinfo(res->ai_addr, res->ai_addrlen, 725 hbuf, sizeof(hbuf), NULL, 0, 726 NI_NUMERICHOST); 727 warn("Connect to address `%s'", hbuf); 728 close(s); 729 res = res->ai_next; 730 if (res) { 731 getnameinfo(res->ai_addr, 732 res->ai_addrlen, hbuf, sizeof(hbuf), 733 NULL, 0, NI_NUMERICHOST); 734 if (verbose) 735 fprintf(ttyout, 736 "Trying %s...\n", hbuf); 737 continue; 738 } 739 warn("Can't connect to %s", host); 740 goto cleanup_fetch_url; 741 } 742 743 break; 744 } 745 #endif 746 747 748 fin = fdopen(s, "r+"); 749 /* 750 * Construct and send the request. 751 */ 752 if (verbose) 753 fprintf(ttyout, "Requesting %s\n", url); 754 leading = " ("; 755 hasleading = 0; 756 if (isproxy) { 757 if (verbose) { 758 fprintf(ttyout, "%svia %s:%s", leading, 759 host, port); 760 leading = ", "; 761 hasleading++; 762 } 763 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 764 if (flushcache) 765 fprintf(fin, "Pragma: no-cache\r\n"); 766 } else { 767 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 768 fprintf(fin, "Host: %s:%d\r\n", host, portnum); 769 fprintf(fin, "Accept: */*\r\n"); 770 fprintf(fin, "Connection: close\r\n"); 771 if (flushcache) 772 fprintf(fin, "Cache-Control: no-cache\r\n"); 773 } 774 fprintf(fin, "User-Agent: %s/%s\r\n", FTP_PRODUCT, FTP_VERSION); 775 if (wwwauth) { 776 if (verbose) { 777 fprintf(ttyout, "%swith authorization", 778 leading); 779 leading = ", "; 780 hasleading++; 781 } 782 fprintf(fin, "Authorization: %s\r\n", wwwauth); 783 } 784 if (proxyauth) { 785 if (verbose) { 786 fprintf(ttyout, 787 "%swith proxy authorization", leading); 788 leading = ", "; 789 hasleading++; 790 } 791 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 792 } 793 if (verbose && hasleading) 794 fputs(")\n", ttyout); 795 fprintf(fin, "\r\n"); 796 if (fflush(fin) == EOF) { 797 warn("Writing HTTP request"); 798 goto cleanup_fetch_url; 799 } 800 801 /* Read the response */ 802 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 803 warn("Receiving HTTP reply"); 804 goto cleanup_fetch_url; 805 } 806 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 807 buf[--len] = '\0'; 808 if (debug) 809 fprintf(ttyout, "received `%s'\n", buf); 810 811 /* Determine HTTP response code */ 812 cp = strchr(buf, ' '); 813 if (cp == NULL) 814 goto improper; 815 else 816 cp++; 817 hcode = strtol(cp, &ep, 10); 818 if (*ep != '\0' && !isspace((unsigned char)*ep)) 819 goto improper; 820 message = xstrdup(cp); 821 822 /* Read the rest of the header. */ 823 FREEPTR(buf); 824 while (1) { 825 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 826 == NULL) { 827 warn("Receiving HTTP reply"); 828 goto cleanup_fetch_url; 829 } 830 while (len > 0 && 831 (buf[len-1] == '\r' || buf[len-1] == '\n')) 832 buf[--len] = '\0'; 833 if (len == 0) 834 break; 835 if (debug) 836 fprintf(ttyout, "received `%s'\n", buf); 837 838 /* Look for some headers */ 839 cp = buf; 840 841 #define CONTENTLEN "Content-Length: " 842 if (strncasecmp(cp, CONTENTLEN, 843 sizeof(CONTENTLEN) - 1) == 0) { 844 cp += sizeof(CONTENTLEN) - 1; 845 filesize = strtol(cp, &ep, 10); 846 if (filesize < 1 || *ep != '\0') 847 goto improper; 848 if (debug) 849 fprintf(ttyout, 850 #ifndef NO_QUAD 851 "parsed length as: %lld\n", 852 (long long)filesize); 853 #else 854 "parsed length as: %ld\n", 855 (long)filesize); 856 #endif 857 858 #define LASTMOD "Last-Modified: " 859 } else if (strncasecmp(cp, LASTMOD, 860 sizeof(LASTMOD) - 1) == 0) { 861 struct tm parsed; 862 char *t; 863 864 cp += sizeof(LASTMOD) - 1; 865 /* RFC 1123 */ 866 if ((t = strptime(cp, 867 "%a, %d %b %Y %H:%M:%S GMT", 868 &parsed)) 869 /* RFC 850 */ 870 || (t = strptime(cp, 871 "%a, %d-%b-%y %H:%M:%S GMT", 872 &parsed)) 873 /* asctime */ 874 || (t = strptime(cp, 875 "%a, %b %d %H:%M:%S %Y", 876 &parsed))) { 877 parsed.tm_isdst = -1; 878 if (*t == '\0') 879 mtime = timegm(&parsed); 880 if (debug && mtime != -1) { 881 fprintf(ttyout, 882 "parsed date as: %s", 883 ctime(&mtime)); 884 } 885 } 886 887 #define LOCATION "Location: " 888 } else if (strncasecmp(cp, LOCATION, 889 sizeof(LOCATION) - 1) == 0) { 890 cp += sizeof(LOCATION) - 1; 891 location = xstrdup(cp); 892 if (debug) 893 fprintf(ttyout, 894 "parsed location as: %s\n", cp); 895 896 #define TRANSENC "Transfer-Encoding: " 897 } else if (strncasecmp(cp, TRANSENC, 898 sizeof(TRANSENC) - 1) == 0) { 899 cp += sizeof(TRANSENC) - 1; 900 if (strcasecmp(cp, "chunked") != 0) { 901 warnx( 902 "Unsupported transfer encoding - `%s'", 903 cp); 904 goto cleanup_fetch_url; 905 } 906 ischunked++; 907 if (debug) 908 fprintf(ttyout, 909 "using chunked encoding\n"); 910 911 #define PROXYAUTH "Proxy-Authenticate: " 912 } else if (strncasecmp(cp, PROXYAUTH, 913 sizeof(PROXYAUTH) - 1) == 0) { 914 cp += sizeof(PROXYAUTH) - 1; 915 FREEPTR(auth); 916 auth = xstrdup(cp); 917 if (debug) 918 fprintf(ttyout, 919 "parsed proxy-auth as: %s\n", cp); 920 921 #define WWWAUTH "WWW-Authenticate: " 922 } else if (strncasecmp(cp, WWWAUTH, 923 sizeof(WWWAUTH) - 1) == 0) { 924 cp += sizeof(WWWAUTH) - 1; 925 FREEPTR(auth); 926 auth = xstrdup(cp); 927 if (debug) 928 fprintf(ttyout, 929 "parsed www-auth as: %s\n", cp); 930 931 } 932 933 } 934 /* finished parsing header */ 935 FREEPTR(buf); 936 937 switch (hcode) { 938 case 200: 939 break; 940 case 300: 941 case 301: 942 case 302: 943 case 303: 944 case 305: 945 if (EMPTYSTRING(location)) { 946 warnx( 947 "No redirection Location provided by server"); 948 goto cleanup_fetch_url; 949 } 950 if (redirect_loop++ > 5) { 951 warnx("Too many redirections requested"); 952 goto cleanup_fetch_url; 953 } 954 if (hcode == 305) { 955 if (verbose) 956 fprintf(ttyout, "Redirected via %s\n", 957 location); 958 rval = fetch_url(url, location, 959 proxyauth, wwwauth); 960 } else { 961 if (verbose) 962 fprintf(ttyout, "Redirected to %s\n", 963 location); 964 rval = go_fetch(location); 965 } 966 goto cleanup_fetch_url; 967 case 401: 968 case 407: 969 { 970 char **authp; 971 char *auser, *apass; 972 973 fprintf(ttyout, "%s\n", message); 974 if (EMPTYSTRING(auth)) { 975 warnx( 976 "No authentication challenge provided by server"); 977 goto cleanup_fetch_url; 978 } 979 if (hcode == 401) { 980 authp = &wwwauth; 981 auser = user; 982 apass = pass; 983 } else { 984 authp = &proxyauth; 985 auser = puser; 986 apass = ppass; 987 } 988 if (*authp != NULL) { 989 char reply[10]; 990 991 fprintf(ttyout, 992 "Authorization failed. Retry (y/n)? "); 993 if (fgets(reply, sizeof(reply), stdin) 994 == NULL) { 995 clearerr(stdin); 996 goto cleanup_fetch_url; 997 } else { 998 if (tolower(reply[0]) != 'y') 999 goto cleanup_fetch_url; 1000 } 1001 auser = NULL; 1002 apass = NULL; 1003 } 1004 if (auth_url(auth, authp, auser, apass) == 0) { 1005 rval = fetch_url(url, proxyenv, 1006 proxyauth, wwwauth); 1007 memset(*authp, 0, strlen(*authp)); 1008 FREEPTR(*authp); 1009 } 1010 goto cleanup_fetch_url; 1011 } 1012 default: 1013 if (message) 1014 warnx("Error retrieving file - `%s'", message); 1015 else 1016 warnx("Unknown error retrieving file"); 1017 goto cleanup_fetch_url; 1018 } 1019 } /* end of ftp:// or http:// specific setup */ 1020 1021 /* Open the output file. */ 1022 if (strcmp(savefile, "-") == 0) { 1023 fout = stdout; 1024 } else if (*savefile == '|') { 1025 oldintp = xsignal(SIGPIPE, SIG_IGN); 1026 fout = popen(savefile + 1, "w"); 1027 if (fout == NULL) { 1028 warn("Can't run `%s'", savefile + 1); 1029 goto cleanup_fetch_url; 1030 } 1031 closefunc = pclose; 1032 } else { 1033 fout = fopen(savefile, "w"); 1034 if (fout == NULL) { 1035 warn("Can't open `%s'", savefile); 1036 goto cleanup_fetch_url; 1037 } 1038 closefunc = fclose; 1039 } 1040 1041 /* Trap signals */ 1042 if (sigsetjmp(httpabort, 1)) 1043 goto cleanup_fetch_url; 1044 (void)xsignal(SIGQUIT, psummary); 1045 oldintr = xsignal(SIGINT, aborthttp); 1046 1047 if (rcvbuf_size > bufsize) { 1048 if (xferbuf) 1049 (void)free(xferbuf); 1050 bufsize = rcvbuf_size; 1051 xferbuf = xmalloc(bufsize); 1052 } 1053 1054 bytes = 0; 1055 hashbytes = mark; 1056 progressmeter(-1); 1057 1058 /* Finally, suck down the file. */ 1059 do { 1060 long chunksize; 1061 1062 chunksize = 0; 1063 /* read chunksize */ 1064 if (ischunked) { 1065 if (fgets(xferbuf, bufsize, fin) == NULL) { 1066 warnx("Unexpected EOF reading chunksize"); 1067 goto cleanup_fetch_url; 1068 } 1069 chunksize = strtol(xferbuf, &ep, 16); 1070 if (strcmp(ep, "\r\n") != 0) { 1071 warnx("Unexpected data following chunksize"); 1072 goto cleanup_fetch_url; 1073 } 1074 if (debug) 1075 fprintf(ttyout, 1076 #ifndef NO_QUAD 1077 "got chunksize of %lld\n", 1078 (long long)chunksize); 1079 #else 1080 "got chunksize of %ld\n", 1081 (long)chunksize); 1082 #endif 1083 if (chunksize == 0) 1084 break; 1085 } 1086 /* transfer file or chunk */ 1087 while (1) { 1088 struct timeval then, now, td; 1089 off_t bufrem; 1090 1091 if (rate_get) 1092 (void)gettimeofday(&then, NULL); 1093 bufrem = rate_get ? rate_get : bufsize; 1094 while (bufrem > 0) { 1095 len = fread(xferbuf, sizeof(char), 1096 ischunked ? MIN(chunksize, bufrem) 1097 : bufsize, fin); 1098 if (len <= 0) 1099 goto chunkdone; 1100 bytes += len; 1101 bufrem -= len; 1102 if (fwrite(xferbuf, sizeof(char), len, fout) 1103 != len) { 1104 warn("Writing `%s'", savefile); 1105 goto cleanup_fetch_url; 1106 } 1107 } 1108 if (hash && !progress) { 1109 while (bytes >= hashbytes) { 1110 (void)putc('#', ttyout); 1111 hashbytes += mark; 1112 } 1113 (void)fflush(ttyout); 1114 } 1115 if (ischunked) { 1116 chunksize -= len; 1117 if (chunksize <= 0) 1118 goto chunkdone; 1119 } 1120 if (rate_get) { 1121 while (1) { 1122 (void)gettimeofday(&now, NULL); 1123 timersub(&now, &then, &td); 1124 if (td.tv_sec > 0) 1125 break; 1126 usleep(1000000 - td.tv_usec); 1127 } 1128 } 1129 } 1130 /* read CRLF after chunk*/ 1131 chunkdone: 1132 if (ischunked) { 1133 if (fgets(xferbuf, bufsize, fin) == NULL) 1134 break; 1135 if (strcmp(xferbuf, "\r\n") != 0) { 1136 warnx("Unexpected data following chunk"); 1137 goto cleanup_fetch_url; 1138 } 1139 } 1140 } while (ischunked); 1141 if (hash && !progress && bytes > 0) { 1142 if (bytes < mark) 1143 (void)putc('#', ttyout); 1144 (void)putc('\n', ttyout); 1145 } 1146 if (ferror(fin)) { 1147 warn("Reading file"); 1148 goto cleanup_fetch_url; 1149 } 1150 progressmeter(1); 1151 bytes = 0; 1152 (void)fflush(fout); 1153 if (closefunc == fclose && mtime != -1) { 1154 struct timeval tval[2]; 1155 1156 (void)gettimeofday(&tval[0], NULL); 1157 tval[1].tv_sec = mtime; 1158 tval[1].tv_usec = 0; 1159 (*closefunc)(fout); 1160 fout = NULL; 1161 1162 if (utimes(savefile, tval) == -1) { 1163 fprintf(ttyout, 1164 "Can't change modification time to %s", 1165 asctime(localtime(&mtime))); 1166 } 1167 } 1168 if (bytes > 0) 1169 ptransfer(0); 1170 1171 rval = 0; 1172 goto cleanup_fetch_url; 1173 1174 improper: 1175 warnx("Improper response from `%s'", host); 1176 1177 cleanup_fetch_url: 1178 if (oldintr) 1179 (void)xsignal(SIGINT, oldintr); 1180 if (oldintp) 1181 (void)xsignal(SIGPIPE, oldintp); 1182 if (fin != NULL) 1183 fclose(fin); 1184 else if (s != -1) 1185 close(s); 1186 if (closefunc != NULL && fout != NULL) 1187 (*closefunc)(fout); 1188 #ifdef NI_NUMERICHOST 1189 if (res != NULL) 1190 freeaddrinfo(res); 1191 #endif 1192 FREEPTR(savefile); 1193 FREEPTR(user); 1194 FREEPTR(pass); 1195 FREEPTR(host); 1196 FREEPTR(port); 1197 FREEPTR(path); 1198 FREEPTR(decodedpath); 1199 FREEPTR(puser); 1200 FREEPTR(ppass); 1201 FREEPTR(buf); 1202 FREEPTR(auth); 1203 FREEPTR(location); 1204 FREEPTR(message); 1205 return (rval); 1206 } 1207 1208 /* 1209 * Abort a HTTP retrieval 1210 */ 1211 void 1212 aborthttp(notused) 1213 int notused; 1214 { 1215 char msgbuf[100]; 1216 int len; 1217 1218 alarmtimer(0); 1219 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf)); 1220 write(fileno(ttyout), msgbuf, len); 1221 siglongjmp(httpabort, 1); 1222 } 1223 1224 /* 1225 * Retrieve ftp URL or classic ftp argument using FTP. 1226 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1227 * is still open (e.g, ftp xfer with trailing /) 1228 */ 1229 static int 1230 fetch_ftp(url) 1231 const char *url; 1232 { 1233 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1234 char *host, *path, *dir, *file, *user, *pass; 1235 char *port; 1236 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1237 in_port_t portnum; 1238 url_t urltype; 1239 1240 host = path = dir = file = user = pass = NULL; 1241 port = NULL; 1242 rval = 1; 1243 type = TYPE_I; 1244 1245 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1246 if ((parse_url(url, "URL", &urltype, &user, &pass, 1247 &host, &port, &portnum, &path) == -1) || 1248 (user != NULL && *user == '\0') || 1249 (pass != NULL && *pass == '\0') || 1250 EMPTYSTRING(host)) { 1251 warnx("Invalid URL `%s'", url); 1252 goto cleanup_fetch_ftp; 1253 } 1254 url_decode(user); 1255 url_decode(pass); 1256 /* 1257 * Note: Don't url_decode(path) here. We need to keep the 1258 * distinction between "/" and "%2F" until later. 1259 */ 1260 1261 /* check for trailing ';type=[aid]' */ 1262 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1263 if (strcasecmp(cp, ";type=a") == 0) 1264 type = TYPE_A; 1265 else if (strcasecmp(cp, ";type=i") == 0) 1266 type = TYPE_I; 1267 else if (strcasecmp(cp, ";type=d") == 0) { 1268 warnx( 1269 "Directory listing via a URL is not supported"); 1270 goto cleanup_fetch_ftp; 1271 } else { 1272 warnx("Invalid suffix `%s' in URL `%s'", cp, 1273 url); 1274 goto cleanup_fetch_ftp; 1275 } 1276 *cp = 0; 1277 } 1278 } else { /* classic style `host:file' */ 1279 urltype = CLASSIC_URL_T; 1280 host = xstrdup(url); 1281 cp = strchr(host, ':'); 1282 if (cp != NULL) { 1283 *cp = '\0'; 1284 path = xstrdup(cp + 1); 1285 } 1286 } 1287 if (EMPTYSTRING(host)) 1288 goto cleanup_fetch_ftp; 1289 1290 /* Extract the file and (if present) directory name. */ 1291 dir = path; 1292 if (! EMPTYSTRING(dir)) { 1293 /* 1294 * If we are dealing with classic `host:path' syntax, 1295 * then a path of the form `/file' (resulting from 1296 * input of the form `host:/file') means that we should 1297 * do "CWD /" before retrieving the file. So we set 1298 * dir="/" and file="file". 1299 * 1300 * But if we are dealing with URLs like 1301 * `ftp://host/path' then a path of the form `/file' 1302 * (resulting from a URL of the form `ftp://host//file') 1303 * means that we should do `CWD ' (with an empty 1304 * argument) before retrieving the file. So we set 1305 * dir="" and file="file". 1306 * 1307 * If the path does not contain / at all, we set 1308 * dir=NULL. (We get a path without any slashes if 1309 * we are dealing with classic `host:file' or URL 1310 * `ftp://host/file'.) 1311 * 1312 * In all other cases, we set dir to a string that does 1313 * not include the final '/' that separates the dir part 1314 * from the file part of the path. (This will be the 1315 * empty string if and only if we are dealing with a 1316 * path of the form `/file' resulting from an URL of the 1317 * form `ftp://host//file'.) 1318 */ 1319 cp = strrchr(dir, '/'); 1320 if (cp == dir && urltype == CLASSIC_URL_T) { 1321 file = cp + 1; 1322 dir = "/"; 1323 } else if (cp != NULL) { 1324 *cp++ = '\0'; 1325 file = cp; 1326 } else { 1327 file = dir; 1328 dir = NULL; 1329 } 1330 } else 1331 dir = NULL; 1332 if (urltype == FTP_URL_T && file != NULL) { 1333 url_decode(file); 1334 /* but still don't url_decode(dir) */ 1335 } 1336 if (debug) 1337 fprintf(ttyout, 1338 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1339 user ? user : "<null>", pass ? pass : "<null>", 1340 host ? host : "<null>", port ? port : "<null>", 1341 path ? path : "<null>", 1342 dir ? dir : "<null>", file ? file : "<null>"); 1343 1344 dirhasglob = filehasglob = 0; 1345 if (doglob && urltype == CLASSIC_URL_T) { 1346 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1347 dirhasglob = 1; 1348 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1349 filehasglob = 1; 1350 } 1351 1352 /* Set up the connection */ 1353 if (connected) 1354 disconnect(0, NULL); 1355 xargv[0] = __progname; 1356 xargv[1] = host; 1357 xargv[2] = NULL; 1358 xargc = 2; 1359 if (port) { 1360 xargv[2] = port; 1361 xargv[3] = NULL; 1362 xargc = 3; 1363 } 1364 oautologin = autologin; 1365 if (user != NULL) 1366 autologin = 0; 1367 setpeer(xargc, xargv); 1368 autologin = oautologin; 1369 if ((connected == 0) || ((connected == 1) 1370 && !ftp_login(host, user, pass))) { 1371 warnx("Can't connect or login to host `%s'", host); 1372 goto cleanup_fetch_ftp; 1373 } 1374 1375 switch (type) { 1376 case TYPE_A: 1377 setascii(0, NULL); 1378 break; 1379 case TYPE_I: 1380 setbinary(0, NULL); 1381 break; 1382 default: 1383 errx(1, "fetch_ftp: unknown transfer type %d", type); 1384 } 1385 1386 /* 1387 * Change directories, if necessary. 1388 * 1389 * Note: don't use EMPTYSTRING(dir) below, because 1390 * dir=="" means something different from dir==NULL. 1391 */ 1392 if (dir != NULL && !dirhasglob) { 1393 char *nextpart; 1394 1395 /* 1396 * If we are dealing with a classic `host:path' (urltype 1397 * is CLASSIC_URL_T) then we have a raw directory 1398 * name (not encoded in any way) and we can change 1399 * directories in one step. 1400 * 1401 * If we are dealing with an `ftp://host/path' URL 1402 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1403 * send a separate CWD command for each unescaped "/" 1404 * in the path, and we have to interpret %hex escaping 1405 * *after* we find the slashes. It's possible to get 1406 * empty components here, (from multiple adjacent 1407 * slashes in the path) and RFC 1738 says that we should 1408 * still do `CWD ' (with a null argument) in such cases. 1409 * 1410 * Many ftp servers don't support `CWD ', so if there's an 1411 * error performing that command, bail out with a descriptive 1412 * message. 1413 * 1414 * Examples: 1415 * 1416 * host: dir="", urltype=CLASSIC_URL_T 1417 * logged in (to default directory) 1418 * host:file dir=NULL, urltype=CLASSIC_URL_T 1419 * "RETR file" 1420 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1421 * "CWD dir", logged in 1422 * ftp://host/ dir="", urltype=FTP_URL_T 1423 * logged in (to default directory) 1424 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1425 * "CWD dir", logged in 1426 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1427 * "RETR file" 1428 * ftp://host//file dir="", urltype=FTP_URL_T 1429 * "CWD ", "RETR file" 1430 * host:/file dir="/", urltype=CLASSIC_URL_T 1431 * "CWD /", "RETR file" 1432 * ftp://host///file dir="/", urltype=FTP_URL_T 1433 * "CWD ", "CWD ", "RETR file" 1434 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1435 * "CWD /", "RETR file" 1436 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1437 * "CWD foo", "RETR file" 1438 * ftp://host/foo/bar/file dir="foo/bar" 1439 * "CWD foo", "CWD bar", "RETR file" 1440 * ftp://host//foo/bar/file dir="/foo/bar" 1441 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1442 * ftp://host/foo//bar/file dir="foo//bar" 1443 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1444 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1445 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1446 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1447 * "CWD /foo", "CWD bar", "RETR file" 1448 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1449 * "CWD /foo/bar", "RETR file" 1450 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1451 * "RETR /foo/bar/file" 1452 * 1453 * Note that we don't need `dir' after this point. 1454 */ 1455 do { 1456 if (urltype == FTP_URL_T) { 1457 nextpart = strchr(dir, '/'); 1458 if (nextpart) { 1459 *nextpart = '\0'; 1460 nextpart++; 1461 } 1462 url_decode(dir); 1463 } else 1464 nextpart = NULL; 1465 if (debug) 1466 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1467 dir ? dir : "<null>", 1468 nextpart ? nextpart : "<null>"); 1469 if (urltype == FTP_URL_T || *dir != '\0') { 1470 xargv[0] = "cd"; 1471 xargv[1] = dir; 1472 xargv[2] = NULL; 1473 dirchange = 0; 1474 cd(2, xargv); 1475 if (! dirchange) { 1476 if (*dir == '\0' && code == 500) 1477 fprintf(stderr, 1478 "\n" 1479 "ftp: The `CWD ' command (without a directory), which is required by\n" 1480 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1481 " conflicts with the server's conformance to RFC 959.\n" 1482 " Try the same URL without the `//' in the URL pathname.\n" 1483 "\n"); 1484 goto cleanup_fetch_ftp; 1485 } 1486 } 1487 dir = nextpart; 1488 } while (dir != NULL); 1489 } 1490 1491 if (EMPTYSTRING(file)) { 1492 rval = -1; 1493 goto cleanup_fetch_ftp; 1494 } 1495 1496 if (dirhasglob) { 1497 (void)strlcpy(rempath, dir, sizeof(rempath)); 1498 (void)strlcat(rempath, "/", sizeof(rempath)); 1499 (void)strlcat(rempath, file, sizeof(rempath)); 1500 file = rempath; 1501 } 1502 1503 /* Fetch the file(s). */ 1504 xargc = 2; 1505 xargv[0] = "get"; 1506 xargv[1] = file; 1507 xargv[2] = NULL; 1508 if (dirhasglob || filehasglob) { 1509 int ointeractive; 1510 1511 ointeractive = interactive; 1512 interactive = 0; 1513 xargv[0] = "mget"; 1514 mget(xargc, xargv); 1515 interactive = ointeractive; 1516 } else { 1517 if (outfile == NULL) { 1518 cp = strrchr(file, '/'); /* find savefile */ 1519 if (cp != NULL) 1520 outfile = cp + 1; 1521 else 1522 outfile = file; 1523 } 1524 xargv[2] = (char *)outfile; 1525 xargv[3] = NULL; 1526 xargc++; 1527 if (restartautofetch) 1528 reget(xargc, xargv); 1529 else 1530 get(xargc, xargv); 1531 } 1532 1533 if ((code / 100) == COMPLETE) 1534 rval = 0; 1535 1536 cleanup_fetch_ftp: 1537 FREEPTR(host); 1538 FREEPTR(path); 1539 FREEPTR(user); 1540 FREEPTR(pass); 1541 return (rval); 1542 } 1543 1544 /* 1545 * Retrieve the given file to outfile. 1546 * Supports arguments of the form: 1547 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1548 * call fetch_ftp() 1549 * "http://host/path" call fetch_url() to use HTTP 1550 * "file:///path" call fetch_url() to copy 1551 * "about:..." print a message 1552 * 1553 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1554 * is still open (e.g, ftp xfer with trailing /) 1555 */ 1556 static int 1557 go_fetch(url) 1558 const char *url; 1559 { 1560 char *proxy; 1561 1562 /* 1563 * Check for about:* 1564 */ 1565 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1566 url += sizeof(ABOUT_URL) -1; 1567 if (strcasecmp(url, "ftp") == 0) { 1568 fputs( 1569 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>\n" 1570 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 1571 } else if (strcasecmp(url, "lukem") == 0) { 1572 fputs( 1573 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 1574 "Please email feedback to <lukem (at) netbsd.org>.\n", ttyout); 1575 } else if (strcasecmp(url, "netbsd") == 0) { 1576 fputs( 1577 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 1578 "For more information, see http://www.netbsd.org/index.html\n", ttyout); 1579 } else if (strcasecmp(url, "version") == 0) { 1580 fprintf(ttyout, "Version: %s %s\n", 1581 FTP_PRODUCT, FTP_VERSION); 1582 } else { 1583 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1584 } 1585 fputs("\n", ttyout); 1586 return (0); 1587 } 1588 1589 /* 1590 * Check for file:// and http:// URLs. 1591 */ 1592 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1593 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1594 return (fetch_url(url, NULL, NULL, NULL)); 1595 1596 /* 1597 * Try FTP URL-style and host:file arguments next. 1598 * If ftpproxy is set with an FTP URL, use fetch_url() 1599 * Othewise, use fetch_ftp(). 1600 */ 1601 proxy = getoptionvalue("ftp_proxy"); 1602 if (!EMPTYSTRING(proxy) && 1603 strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1604 return (fetch_url(url, NULL, NULL, NULL)); 1605 1606 return (fetch_ftp(url)); 1607 } 1608 1609 /* 1610 * Retrieve multiple files from the command line, 1611 * calling go_fetch() for each file. 1612 * 1613 * If an ftp path has a trailing "/", the path will be cd-ed into and 1614 * the connection remains open, and the function will return -1 1615 * (to indicate the connection is alive). 1616 * If an error occurs the return value will be the offset+1 in 1617 * argv[] of the file that caused a problem (i.e, argv[x] 1618 * returns x+1) 1619 * Otherwise, 0 is returned if all files retrieved successfully. 1620 */ 1621 int 1622 auto_fetch(argc, argv) 1623 int argc; 1624 char *argv[]; 1625 { 1626 volatile int argpos; 1627 int rval; 1628 1629 argpos = 0; 1630 1631 if (sigsetjmp(toplevel, 1)) { 1632 if (connected) 1633 disconnect(0, NULL); 1634 return (argpos + 1); 1635 } 1636 (void)xsignal(SIGINT, intr); 1637 (void)xsignal(SIGPIPE, lostpeer); 1638 1639 /* 1640 * Loop through as long as there's files to fetch. 1641 */ 1642 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1643 if (strchr(argv[argpos], ':') == NULL) 1644 break; 1645 redirect_loop = 0; 1646 if (!anonftp) 1647 anonftp = 2; /* Handle "automatic" transfers. */ 1648 rval = go_fetch(argv[argpos]); 1649 if (outfile != NULL && strcmp(outfile, "-") != 0 1650 && outfile[0] != '|') 1651 outfile = NULL; 1652 if (rval > 0) 1653 rval = argpos + 1; 1654 } 1655 1656 if (connected && rval != -1) 1657 disconnect(0, NULL); 1658 return (rval); 1659 } 1660
Indexes created Mon Sep 22 13:09:51 GMT 2025