fetch.c revision 1.78
1 /* $NetBSD: fetch.c,v 1.78 1999/09/28 06:47:41 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997, 1998, 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 1.78 1999/09/28 06:47:41 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 #include <sys/utsname.h> 54 55 #include <netinet/in.h> 56 57 #include <arpa/ftp.h> 58 #include <arpa/inet.h> 59 60 #include <ctype.h> 61 #include <err.h> 62 #include <errno.h> 63 #include <netdb.h> 64 #include <fcntl.h> 65 #include <stdio.h> 66 #include <stdlib.h> 67 #include <string.h> 68 #include <unistd.h> 69 #include <time.h> 70 #include <util.h> 71 72 #include "ftp_var.h" 73 74 typedef 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 82 void aborthttp __P((int)); 83 static int auth_url __P((const char *, char **, const char *, 84 const char *)); 85 static void base64_encode __P((const char *, size_t, char *)); 86 static int go_fetch __P((const char *)); 87 static int fetch_ftp __P((const char *)); 88 static int fetch_url __P((const char *, const char *, char *, char *)); 89 static int parse_url __P((const char *, const char *, url_t *, char **, 90 char **, char **, char **, 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 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 103 #define FREEPTR(x) if ((x) != NULL) { free(x); (x) = NULL; } 104 105 /* 106 * Generate authorization response based on given authentication challenge. 107 * Returns -1 if an error occurred, otherwise 0. 108 * Sets response to a malloc(3)ed string; caller should free. 109 */ 110 static int 111 auth_url(challenge, response, guser, gpass) 112 const char *challenge; 113 char **response; 114 const char *guser; 115 const char *gpass; 116 { 117 char *cp, *ep, *clear, *line, *realm, *scheme; 118 char user[BUFSIZ], *pass; 119 int rval; 120 size_t len, clen, rlen; 121 122 *response = NULL; 123 clear = realm = scheme = NULL; 124 rval = -1; 125 line = xstrdup(challenge); 126 cp = line; 127 128 if (debug) 129 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 130 131 scheme = strsep(&cp, " "); 132 #define SCHEME_BASIC "Basic" 133 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 134 warnx("Unsupported WWW Authentication challenge - `%s'", 135 challenge); 136 goto cleanup_auth_url; 137 } 138 cp += strspn(cp, " "); 139 140 #define REALM "realm=\"" 141 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 142 cp += sizeof(REALM) - 1; 143 else { 144 warnx("Unsupported WWW Authentication challenge - `%s'", 145 challenge); 146 goto cleanup_auth_url; 147 } 148 if ((ep = strchr(cp, '\"')) != NULL) { 149 size_t len = ep - cp; 150 151 realm = (char *)xmalloc(len + 1); 152 (void)strlcpy(realm, cp, len + 1); 153 } else { 154 warnx("Unsupported WWW Authentication challenge - `%s'", 155 challenge); 156 goto cleanup_auth_url; 157 } 158 159 if (guser != NULL) 160 (void)strlcpy(user, guser, sizeof(user)); 161 else { 162 fprintf(ttyout, "Username for `%s': ", realm); 163 (void)fflush(ttyout); 164 if (fgets(user, sizeof(user) - 1, stdin) == NULL) 165 goto cleanup_auth_url; 166 user[strlen(user) - 1] = '\0'; 167 } 168 if (gpass != NULL) 169 pass = (char *)gpass; 170 else 171 pass = getpass("Password: "); 172 173 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 174 clear = (char *)xmalloc(clen); 175 (void)strlcpy(clear, user, clen); 176 (void)strlcat(clear, ":", clen); 177 (void)strlcat(clear, pass, clen); 178 if (gpass == NULL) 179 memset(pass, '\0', strlen(pass)); 180 181 /* scheme + " " + enc + "\0" */ 182 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 183 *response = (char *)xmalloc(rlen); 184 (void)strlcpy(*response, scheme, rlen); 185 len = strlcat(*response, " ", rlen); 186 base64_encode(clear, clen, *response + len); 187 memset(clear, '\0', clen); 188 rval = 0; 189 190 cleanup_auth_url: 191 FREEPTR(clear); 192 FREEPTR(line); 193 FREEPTR(realm); 194 return (rval); 195 } 196 197 /* 198 * Encode len bytes starting at clear using base64 encoding into encoded, 199 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 200 */ 201 void 202 base64_encode(clear, len, encoded) 203 const char *clear; 204 size_t len; 205 char *encoded; 206 { 207 static const char enc[] = 208 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 209 char *cp; 210 int i; 211 212 cp = encoded; 213 for (i = 0; i < len; i += 3) { 214 *(cp++) = enc[((clear[i + 0] >> 2))]; 215 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 216 | ((clear[i + 1] >> 4) & 0x0f)]; 217 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 218 | ((clear[i + 2] >> 6) & 0x03)]; 219 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 220 } 221 *cp = '\0'; 222 while (i-- > len) 223 *(--cp) = '='; 224 } 225 226 /* 227 * Decode %xx escapes in given string, `in-place'. 228 */ 229 static void 230 url_decode(url) 231 char *url; 232 { 233 unsigned char *p, *q; 234 235 if (EMPTYSTRING(url)) 236 return; 237 p = q = (unsigned char *)url; 238 239 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 240 while (*p) { 241 if (p[0] == '%' 242 && p[1] && isxdigit((unsigned char)p[1]) 243 && p[2] && isxdigit((unsigned char)p[2])) { 244 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 245 p+=3; 246 } else 247 *q++ = *p++; 248 } 249 *q = '\0'; 250 } 251 252 253 /* 254 * Parse URL of form: 255 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 256 * Returns -1 if a parse error occurred, otherwise 0. 257 * It's the caller's responsibility to url_decode() the returned 258 * user, pass and path. 259 * 260 * Sets type to url_t, each of the given char ** pointers to a 261 * malloc(3)ed strings of the relevant section, and port to 262 * the number given, or ftpport if ftp://, or httpport if http://. 263 * 264 * If <host> is surrounded by `[' and ']', it's parsed as an 265 * IPv6 address (as per draft-ietf-ipngwg-url-literal-01.txt). 266 * 267 * XXX: this is not totally RFC 1738 compliant; <path> will have the 268 * leading `/' unless it's an ftp:// URL, as this makes things easier 269 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 270 * host and the url-path removed, but any additional leading slashes 271 * in the url-path are retained (because they imply that we should 272 * later do "CWD" with a null argument). 273 * 274 * Examples: 275 * input url output path 276 * --------- ----------- 277 * "ftp://host" NULL 278 * "http://host/" NULL 279 * "file://host/dir/file" "dir/file" 280 * "ftp://host/" "" 281 * "ftp://host//" NULL 282 * "ftp://host//dir/file" "/dir/file" 283 */ 284 static int 285 parse_url(url, desc, type, user, pass, host, port, path) 286 const char *url; 287 const char *desc; 288 url_t *type; 289 char **user; 290 char **pass; 291 char **host; 292 char **port; 293 char **path; 294 { 295 char *cp, *ep, *thost, *tport; 296 size_t len; 297 298 if (url == NULL || desc == NULL || type == NULL || user == NULL 299 || pass == NULL || host == NULL || port == NULL || path == NULL) 300 errx(1, "parse_url: invoked with NULL argument!"); 301 302 *type = UNKNOWN_URL_T; 303 *user = *pass = *host = *port = *path = NULL; 304 tport = NULL; 305 306 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 307 url += sizeof(HTTP_URL) - 1; 308 *type = HTTP_URL_T; 309 tport = httpport; 310 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 311 url += sizeof(FTP_URL) - 1; 312 *type = FTP_URL_T; 313 tport = ftpport; 314 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 315 url += sizeof(FILE_URL) - 1; 316 *type = FILE_URL_T; 317 } else { 318 warnx("Invalid %s `%s'", desc, url); 319 cleanup_parse_url: 320 FREEPTR(*user); 321 FREEPTR(*pass); 322 FREEPTR(*host); 323 FREEPTR(*port); 324 FREEPTR(*path); 325 return (-1); 326 } 327 328 if (*url == '\0') 329 return (0); 330 331 /* find [user[:pass]@]host[:port] */ 332 ep = strchr(url, '/'); 333 if (ep == NULL) 334 thost = xstrdup(url); 335 else { 336 len = ep - url; 337 thost = (char *)xmalloc(len + 1); 338 (void)strlcpy(thost, url, len + 1); 339 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 340 ep++; 341 *path = xstrdup(ep); 342 } 343 344 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 345 if (cp != NULL) { 346 if (*type == FTP_URL_T) 347 anonftp = 0; /* disable anonftp */ 348 *user = thost; 349 *cp = '\0'; 350 thost = xstrdup(cp + 1); 351 cp = strchr(*user, ':'); 352 if (cp != NULL) { 353 *cp = '\0'; 354 *pass = xstrdup(cp + 1); 355 } 356 } 357 358 #ifdef INET6 359 /* 360 * Check if thost is an encoded IPv6 address, as per 361 * draft-ietf-ipngwg-url-literal-01.txt: 362 * `[' ipv6-address ']' 363 */ 364 if (*thost == '[') { 365 cp = thost + 1; 366 if ((ep = strchr(cp, ']')) == NULL || 367 (ep[1] != '\0' && ep[1] != '\0')) { 368 warnx("Invalid address `%s' in %s `%s'", 369 thost, desc, url); 370 goto cleanup_parse_url; 371 } 372 len = ep - cp; /* change `[xxx]' -> `xxx' */ 373 memmove(thost, thost + 1, len); 374 thost[len] = '\0'; 375 if (! isipv6addr(thost)) { 376 warnx("Invalid IPv6 address `%s' in %s `%s'", 377 thost, desc, url); 378 goto cleanup_parse_url; 379 } 380 cp = ep + 1; 381 if (*cp == ':') 382 cp++; 383 else 384 cp = NULL; 385 } else 386 #endif /* INET6 */ 387 if ((cp = strchr(thost, ':')) != NULL) 388 *cp++ = '\0'; 389 *host = thost; 390 391 /* look for [:port] */ 392 if (cp != NULL) { 393 long nport; 394 395 nport = strtol(cp, &ep, 10); 396 if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 397 warnx("Invalid port `%s' in %s `%s'", cp, desc, url); 398 goto cleanup_parse_url; 399 } 400 tport = cp; 401 } 402 if (tport != NULL); 403 *port = xstrdup(tport); 404 405 if (debug) 406 fprintf(ttyout, 407 "parse_url: user `%s' pass `%s' host %s:%s path `%s'\n", 408 *user ? *user : "<null>", *pass ? *pass : "<null>", 409 *host ? *host : "<null>", *port ? *port : "<null>", 410 *path ? *path : "<null>"); 411 412 return (0); 413 } 414 415 416 jmp_buf httpabort; 417 418 /* 419 * Retrieve URL, via a proxy if necessary, using HTTP. 420 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 421 * http_proxy as appropriate. 422 * Supports HTTP redirects. 423 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 424 * is still open (e.g, ftp xfer with trailing /) 425 */ 426 static int 427 fetch_url(url, proxyenv, proxyauth, wwwauth) 428 const char *url; 429 const char *proxyenv; 430 char *proxyauth; 431 char *wwwauth; 432 { 433 #ifdef NI_NUMERICHOST 434 struct addrinfo hints, *res = NULL; 435 int error; 436 #else 437 struct sockaddr_in sin; 438 struct hostent *hp = NULL; 439 #endif 440 volatile sig_t oldintr, oldintp; 441 volatile int s; 442 int ischunked, isproxy, rval, hcode; 443 size_t len; 444 static size_t bufsize; 445 static char *xferbuf; 446 char *cp, *ep, *buf, *savefile; 447 char *auth, *location, *message; 448 char *user, *pass, *host, *port, *path, *decodedpath; 449 char *puser, *ppass; 450 off_t hashbytes; 451 int (*closefunc) __P((FILE *)); 452 FILE *fin, *fout; 453 time_t mtime; 454 url_t urltype; 455 in_port_t portnum; 456 457 closefunc = NULL; 458 fin = fout = NULL; 459 s = -1; 460 buf = savefile = NULL; 461 auth = location = message = NULL; 462 ischunked = isproxy = hcode = 0; 463 rval = 1; 464 user = pass = host = path = decodedpath = puser = ppass = NULL; 465 466 #ifdef __GNUC__ /* shut up gcc warnings */ 467 (void)&closefunc; 468 (void)&fin; 469 (void)&fout; 470 (void)&buf; 471 (void)&savefile; 472 (void)&rval; 473 (void)&isproxy; 474 (void)&hcode; 475 (void)&ischunked; 476 (void)&message; 477 (void)&location; 478 (void)&auth; 479 (void)&decodedpath; 480 #endif 481 482 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, &path) 483 == -1) 484 goto cleanup_fetch_url; 485 portnum = strtol(port, &ep, 10); 486 if (*ep || port == ep) { 487 struct servent *svp = getservbyname(port, "tcp"); 488 if (svp != NULL) 489 portnum = ntohs(svp->s_port); 490 } 491 492 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 493 && strcasecmp(host, "localhost") != 0) { 494 warnx("No support for non local file URL `%s'", url); 495 goto cleanup_fetch_url; 496 } 497 498 if (EMPTYSTRING(path)) { 499 if (urltype == FTP_URL_T) { 500 rval = fetch_ftp(url); 501 goto cleanup_fetch_url; 502 } 503 if (urltype != HTTP_URL_T || outfile == NULL) { 504 warnx("Invalid URL (no file after host) `%s'", url); 505 goto cleanup_fetch_url; 506 } 507 } 508 509 decodedpath = xstrdup(path); 510 url_decode(decodedpath); 511 512 if (outfile) 513 savefile = xstrdup(outfile); 514 else { 515 cp = strrchr(decodedpath, '/'); /* find savefile */ 516 if (cp != NULL) 517 savefile = xstrdup(cp + 1); 518 else 519 savefile = xstrdup(decodedpath); 520 } 521 if (EMPTYSTRING(savefile)) { 522 if (urltype == FTP_URL_T) { 523 rval = fetch_ftp(url); 524 goto cleanup_fetch_url; 525 } 526 warnx("Invalid URL (no file after directory) `%s'", url); 527 goto cleanup_fetch_url; 528 } else { 529 if (debug) 530 fprintf(ttyout, "got savefile as `%s'\n", savefile); 531 } 532 533 filesize = -1; 534 mtime = -1; 535 if (urltype == FILE_URL_T) { /* file:// URLs */ 536 struct stat sb; 537 538 direction = "copied"; 539 fin = fopen(decodedpath, "r"); 540 if (fin == NULL) { 541 warn("Cannot open file `%s'", decodedpath); 542 goto cleanup_fetch_url; 543 } 544 if (fstat(fileno(fin), &sb) == 0) { 545 mtime = sb.st_mtime; 546 filesize = sb.st_size; 547 } 548 if (verbose) 549 fprintf(ttyout, "Copying %s\n", decodedpath); 550 } else { /* ftp:// or http:// URLs */ 551 char *leading; 552 int hasleading; 553 554 if (proxyenv == NULL) { 555 if (urltype == HTTP_URL_T) 556 proxyenv = httpproxy; 557 else if (urltype == FTP_URL_T) 558 proxyenv = ftpproxy; 559 } 560 direction = "retrieved"; 561 if (proxyenv != NULL) { /* use proxy */ 562 url_t purltype; 563 char *phost, *ppath; 564 char *pport; 565 566 isproxy = 1; 567 568 /* check URL against list of no_proxied sites */ 569 if (no_proxy != NULL) { 570 char *np, *np_copy; 571 long np_port; 572 size_t hlen, plen; 573 574 np_copy = xstrdup(no_proxy); 575 hlen = strlen(host); 576 while ((cp = strsep(&np_copy, " ,")) != NULL) { 577 if (*cp == '\0') 578 continue; 579 if ((np = strrchr(cp, ':')) != NULL) { 580 *np = '\0'; 581 np_port = 582 strtol(np + 1, &ep, 10); 583 if (*ep != '\0') 584 continue; 585 if (portnum != 586 htons((in_port_t)np_port)) 587 continue; 588 } 589 plen = strlen(cp); 590 if (strncasecmp(host + hlen - plen, 591 cp, plen) == 0) { 592 isproxy = 0; 593 break; 594 } 595 } 596 FREEPTR(np_copy); 597 } 598 599 if (isproxy) { 600 if (parse_url(proxyenv, "proxy URL", &purltype, 601 &puser, &ppass, &phost, &pport, &ppath) 602 == -1) 603 goto cleanup_fetch_url; 604 605 if ((purltype != HTTP_URL_T 606 && purltype != FTP_URL_T) || 607 EMPTYSTRING(phost) || 608 (! EMPTYSTRING(ppath) 609 && strcmp(ppath, "/") != 0)) { 610 warnx("Malformed proxy URL `%s'", 611 proxyenv); 612 FREEPTR(phost); 613 FREEPTR(pport); 614 FREEPTR(ppath); 615 goto cleanup_fetch_url; 616 } 617 618 FREEPTR(host); 619 host = phost; 620 FREEPTR(port); 621 port = pport; 622 FREEPTR(path); 623 path = xstrdup(url); 624 FREEPTR(ppath); 625 } 626 } /* proxyenv != NULL */ 627 628 #ifndef NI_NUMERICHOST 629 memset(&sin, 0, sizeof(sin)); 630 sin.sin_family = AF_INET; 631 632 if (isdigit((unsigned char)host[0])) { 633 if (inet_aton(host, &sin.sin_addr) == 0) { 634 warnx("Invalid IP address `%s'", host); 635 goto cleanup_fetch_url; 636 } 637 } else { 638 hp = gethostbyname(host); 639 if (hp == NULL) { 640 warnx("%s: %s", host, hstrerror(h_errno)); 641 goto cleanup_fetch_url; 642 } 643 if (hp->h_addrtype != AF_INET) { 644 warnx("`%s': not an Internet address?", host); 645 goto cleanup_fetch_url; 646 } 647 if (hp->h_length > sizeof(sin.sin_addr)) 648 hp->h_length = sizeof(sin.sin_addr); 649 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 650 } 651 652 if (port == NULL) { 653 warnx("Unknown port for URL `%s'", url); 654 goto cleanup_fetch_url; 655 } 656 portnum = strtol(port, &ep, 10); 657 if (*ep || port == ep) { 658 struct servent *svp = getservbyname(port, "tcp"); 659 if (svp != NULL) 660 portnum = ntohs(svp->s_port); 661 } 662 sin.sin_port = portnum; 663 664 s = socket(AF_INET, SOCK_STREAM, 0); 665 if (s == -1) { 666 warn("Can't create socket"); 667 goto cleanup_fetch_url; 668 } 669 670 while (xconnect(s, (struct sockaddr *)&sin, 671 sizeof(sin)) == -1) { 672 if (errno == EINTR) 673 continue; 674 if (hp && hp->h_addr_list[1]) { 675 int oerrno = errno; 676 char *ia; 677 678 ia = inet_ntoa(sin.sin_addr); 679 errno = oerrno; 680 warn("Connect to address `%s'", ia); 681 hp->h_addr_list++; 682 memcpy(&sin.sin_addr, hp->h_addr_list[0], 683 (size_t)hp->h_length); 684 if (verbose) 685 fprintf(ttyout, "Trying %s...\n", 686 inet_ntoa(sin.sin_addr)); 687 (void)close(s); 688 s = socket(AF_INET, SOCK_STREAM, 0); 689 if (s < 0) { 690 warn("Can't create socket"); 691 goto cleanup_fetch_url; 692 } 693 continue; 694 } 695 warn("Can't connect to `%s'", host); 696 goto cleanup_fetch_url; 697 } 698 #else 699 memset(&hints, 0, sizeof(hints)); 700 hints.ai_flags = 0; 701 hints.ai_family = AF_UNSPEC; 702 hints.ai_socktype = SOCK_STREAM; 703 hints.ai_protocol = 0; 704 error = getaddrinfo(host, port, &hints, &res); 705 if (error) { 706 warnx(gai_strerror(error)); 707 goto cleanup_fetch_url; 708 } 709 710 while (1) { 711 s = socket(res->ai_family, 712 res->ai_socktype, res->ai_protocol); 713 if (s < 0) { 714 warn("Can't create socket"); 715 goto cleanup_fetch_url; 716 } 717 718 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 719 char hbuf[MAXHOSTNAMELEN]; 720 getnameinfo(res->ai_addr, res->ai_addrlen, 721 hbuf, sizeof(hbuf), NULL, 0, 722 NI_NUMERICHOST); 723 warn("Connect to address `%s'", hbuf); 724 close(s); 725 res = res->ai_next; 726 if (res) { 727 getnameinfo(res->ai_addr, 728 res->ai_addrlen, hbuf, sizeof(hbuf), 729 NULL, 0, NI_NUMERICHOST); 730 if (verbose) 731 fprintf(ttyout, 732 "Trying %s...\n", hbuf); 733 continue; 734 } 735 warn("Can't connect to %s", host); 736 goto cleanup_fetch_url; 737 } 738 739 break; 740 } 741 #endif 742 743 744 fin = fdopen(s, "r+"); 745 /* 746 * Construct and send the request. 747 */ 748 if (verbose) 749 fprintf(ttyout, "Requesting %s\n", url); 750 leading = " ("; 751 hasleading = 0; 752 if (isproxy) { 753 if (verbose) { 754 fprintf(ttyout, "%svia %s:%s", leading, 755 host, port); 756 leading = ", "; 757 hasleading++; 758 } 759 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 760 if (flushcache) 761 fprintf(fin, "Pragma: no-cache\r\n"); 762 } else { 763 struct utsname unam; 764 765 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 766 fprintf(fin, "Host: %s:%s\r\n", host, port); 767 fprintf(fin, "Accept: */*\r\n"); 768 if (uname(&unam) != -1) { 769 fprintf(fin, "User-Agent: %s-%s/ftp\r\n", 770 unam.sysname, unam.release); 771 } 772 fprintf(fin, "Connection: close\r\n"); 773 if (flushcache) 774 fprintf(fin, "Cache-Control: no-cache\r\n"); 775 } 776 if (wwwauth) { 777 if (verbose) { 778 fprintf(ttyout, "%swith authorization", 779 leading); 780 leading = ", "; 781 hasleading++; 782 } 783 fprintf(fin, "Authorization: %s\r\n", wwwauth); 784 } 785 if (proxyauth) { 786 if (verbose) { 787 fprintf(ttyout, 788 "%swith proxy authorization", leading); 789 leading = ", "; 790 hasleading++; 791 } 792 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 793 } 794 if (verbose && hasleading) 795 fputs(")\n", ttyout); 796 fprintf(fin, "\r\n"); 797 if (fflush(fin) == EOF) { 798 warn("Writing HTTP request"); 799 goto cleanup_fetch_url; 800 } 801 802 /* Read the response */ 803 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 804 warn("Receiving HTTP reply"); 805 goto cleanup_fetch_url; 806 } 807 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 808 buf[--len] = '\0'; 809 if (debug) 810 fprintf(ttyout, "received `%s'\n", buf); 811 812 /* Determine HTTP response code */ 813 cp = strchr(buf, ' '); 814 if (cp == NULL) 815 goto improper; 816 else 817 cp++; 818 hcode = strtol(cp, &ep, 10); 819 if (*ep != '\0' && !isspace((unsigned char)*ep)) 820 goto improper; 821 message = xstrdup(cp); 822 823 /* Read the rest of the header. */ 824 FREEPTR(buf); 825 while (1) { 826 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 827 == NULL) { 828 warn("Receiving HTTP reply"); 829 goto cleanup_fetch_url; 830 } 831 while (len > 0 && 832 (buf[len-1] == '\r' || buf[len-1] == '\n')) 833 buf[--len] = '\0'; 834 if (len == 0) 835 break; 836 if (debug) 837 fprintf(ttyout, "received `%s'\n", buf); 838 839 /* Look for some headers */ 840 cp = buf; 841 842 #define CONTENTLEN "Content-Length: " 843 if (strncasecmp(cp, CONTENTLEN, 844 sizeof(CONTENTLEN) - 1) == 0) { 845 cp += sizeof(CONTENTLEN) - 1; 846 filesize = strtol(cp, &ep, 10); 847 if (filesize < 1 || *ep != '\0') 848 goto improper; 849 if (debug) 850 fprintf(ttyout, 851 #ifndef NO_QUAD 852 "parsed length as: %lld\n", 853 (long long)filesize); 854 #else 855 "parsed length as: %ld\n", 856 (long)filesize); 857 #endif 858 859 #define LASTMOD "Last-Modified: " 860 } else if (strncasecmp(cp, LASTMOD, 861 sizeof(LASTMOD) - 1) == 0) { 862 struct tm parsed; 863 char *t; 864 865 cp += sizeof(LASTMOD) - 1; 866 /* RFC 1123 */ 867 if ((t = strptime(cp, 868 "%a, %d %b %Y %H:%M:%S GMT", 869 &parsed)) 870 /* RFC 850 */ 871 || (t = strptime(cp, 872 "%a, %d-%b-%y %H:%M:%S GMT", 873 &parsed)) 874 /* asctime */ 875 || (t = strptime(cp, 876 "%a, %b %d %H:%M:%S %Y", 877 &parsed))) { 878 parsed.tm_isdst = -1; 879 if (*t == '\0') 880 mtime = timegm(&parsed); 881 if (debug && mtime != -1) { 882 fprintf(ttyout, 883 "parsed date as: %s", 884 ctime(&mtime)); 885 } 886 } 887 888 #define LOCATION "Location: " 889 } else if (strncasecmp(cp, LOCATION, 890 sizeof(LOCATION) - 1) == 0) { 891 cp += sizeof(LOCATION) - 1; 892 location = xstrdup(cp); 893 if (debug) 894 fprintf(ttyout, 895 "parsed location as: %s\n", cp); 896 897 #define TRANSENC "Transfer-Encoding: " 898 } else if (strncasecmp(cp, TRANSENC, 899 sizeof(TRANSENC) - 1) == 0) { 900 cp += sizeof(TRANSENC) - 1; 901 if (strcasecmp(cp, "chunked") != 0) { 902 warnx( 903 "Unsupported transfer encoding - `%s'", 904 cp); 905 goto cleanup_fetch_url; 906 } 907 ischunked++; 908 if (debug) 909 fprintf(ttyout, 910 "using chunked encoding\n"); 911 912 #define PROXYAUTH "Proxy-Authenticate: " 913 } else if (strncasecmp(cp, PROXYAUTH, 914 sizeof(PROXYAUTH) - 1) == 0) { 915 cp += sizeof(PROXYAUTH) - 1; 916 FREEPTR(auth); 917 auth = xstrdup(cp); 918 if (debug) 919 fprintf(ttyout, 920 "parsed proxy-auth as: %s\n", cp); 921 922 #define WWWAUTH "WWW-Authenticate: " 923 } else if (strncasecmp(cp, WWWAUTH, 924 sizeof(WWWAUTH) - 1) == 0) { 925 cp += sizeof(WWWAUTH) - 1; 926 FREEPTR(auth); 927 auth = xstrdup(cp); 928 if (debug) 929 fprintf(ttyout, 930 "parsed www-auth as: %s\n", cp); 931 932 } 933 934 } 935 /* finished parsing header */ 936 FREEPTR(buf); 937 938 switch (hcode) { 939 case 200: 940 break; 941 case 300: 942 case 301: 943 case 302: 944 case 303: 945 case 305: 946 if (EMPTYSTRING(location)) { 947 warnx( 948 "No redirection Location provided by server"); 949 goto cleanup_fetch_url; 950 } 951 if (redirect_loop++ > 5) { 952 warnx("Too many redirections requested"); 953 goto cleanup_fetch_url; 954 } 955 if (hcode == 305) { 956 if (verbose) 957 fprintf(ttyout, "Redirected via %s\n", 958 location); 959 rval = fetch_url(url, location, 960 proxyauth, wwwauth); 961 } else { 962 if (verbose) 963 fprintf(ttyout, "Redirected to %s\n", 964 location); 965 rval = go_fetch(location); 966 } 967 goto cleanup_fetch_url; 968 case 401: 969 case 407: 970 { 971 char **authp; 972 char *auser, *apass; 973 974 fprintf(ttyout, "%s\n", message); 975 if (EMPTYSTRING(auth)) { 976 warnx( 977 "No authentication challenge provided by server"); 978 goto cleanup_fetch_url; 979 } 980 if (hcode == 401) { 981 authp = &wwwauth; 982 auser = user; 983 apass = pass; 984 } else { 985 authp = &proxyauth; 986 auser = puser; 987 apass = ppass; 988 } 989 if (*authp != NULL) { 990 char reply[10]; 991 992 fprintf(ttyout, 993 "Authorization failed. Retry (y/n)? "); 994 if (fgets(reply, sizeof(reply), stdin) != NULL 995 && tolower(reply[0]) != 'y') 996 goto cleanup_fetch_url; 997 auser = NULL; 998 apass = NULL; 999 } 1000 if (auth_url(auth, authp, auser, apass) == 0) { 1001 rval = fetch_url(url, proxyenv, 1002 proxyauth, wwwauth); 1003 memset(*authp, '\0', strlen(*authp)); 1004 FREEPTR(*authp); 1005 } 1006 goto cleanup_fetch_url; 1007 } 1008 default: 1009 if (message) 1010 warnx("Error retrieving file - `%s'", message); 1011 else 1012 warnx("Unknown error retrieving file"); 1013 goto cleanup_fetch_url; 1014 } 1015 } /* end of ftp:// or http:// specific setup */ 1016 1017 oldintr = oldintp = NULL; 1018 1019 /* Open the output file. */ 1020 if (strcmp(savefile, "-") == 0) { 1021 fout = stdout; 1022 } else if (*savefile == '|') { 1023 oldintp = xsignal(SIGPIPE, SIG_IGN); 1024 fout = popen(savefile + 1, "w"); 1025 if (fout == NULL) { 1026 warn("Can't run `%s'", savefile + 1); 1027 goto cleanup_fetch_url; 1028 } 1029 closefunc = pclose; 1030 } else { 1031 fout = fopen(savefile, "w"); 1032 if (fout == NULL) { 1033 warn("Can't open `%s'", savefile); 1034 goto cleanup_fetch_url; 1035 } 1036 closefunc = fclose; 1037 } 1038 1039 /* Trap signals */ 1040 if (setjmp(httpabort)) { 1041 if (oldintr) 1042 (void)xsignal(SIGINT, oldintr); 1043 if (oldintp) 1044 (void)xsignal(SIGPIPE, oldintp); 1045 goto cleanup_fetch_url; 1046 } 1047 oldintr = xsignal(SIGINT, aborthttp); 1048 1049 if (rcvbuf_size > bufsize) { 1050 if (xferbuf) 1051 (void)free(xferbuf); 1052 bufsize = rcvbuf_size; 1053 xferbuf = xmalloc(bufsize); 1054 } 1055 if (debug) 1056 fprintf(ttyout, "using a buffer size of %d\n", (int)bufsize); 1057 1058 bytes = 0; 1059 hashbytes = mark; 1060 progressmeter(-1); 1061 1062 /* Finally, suck down the file. */ 1063 do { 1064 long chunksize; 1065 1066 chunksize = 0; 1067 /* read chunksize */ 1068 if (ischunked) { 1069 if (fgets(xferbuf, bufsize, fin) == NULL) { 1070 warnx("Unexpected EOF reading chunksize"); 1071 goto cleanup_fetch_url; 1072 } 1073 chunksize = strtol(xferbuf, &ep, 16); 1074 if (strcmp(ep, "\r\n") != 0) { 1075 warnx("Unexpected data following chunksize"); 1076 goto cleanup_fetch_url; 1077 } 1078 if (debug) 1079 fprintf(ttyout, 1080 #ifndef NO_QUAD 1081 "got chunksize of %lld\n", 1082 (long long)chunksize); 1083 #else 1084 "got chunksize of %ld\n", 1085 (long)chunksize); 1086 #endif 1087 if (chunksize == 0) 1088 break; 1089 } 1090 /* transfer file or chunk */ 1091 while (1) { 1092 struct timeval then, now, td; 1093 off_t bufrem; 1094 1095 if (rate_get) 1096 (void)gettimeofday(&then, NULL); 1097 bufrem = rate_get ? rate_get : bufsize; 1098 while (bufrem > 0) { 1099 len = fread(xferbuf, sizeof(char), 1100 ischunked ? MIN(chunksize, bufrem) 1101 : bufsize, fin); 1102 if (len <= 0) 1103 goto chunkdone; 1104 bytes += len; 1105 bufrem -= len; 1106 if (fwrite(xferbuf, sizeof(char), len, fout) 1107 != len) { 1108 warn("Writing `%s'", savefile); 1109 goto cleanup_fetch_url; 1110 } 1111 } 1112 if (hash && !progress) { 1113 while (bytes >= hashbytes) { 1114 (void)putc('#', ttyout); 1115 hashbytes += mark; 1116 } 1117 (void)fflush(ttyout); 1118 } 1119 if (ischunked) { 1120 chunksize -= len; 1121 if (chunksize <= 0) 1122 goto chunkdone; 1123 } 1124 if (rate_get) { 1125 while (1) { 1126 (void)gettimeofday(&now, NULL); 1127 timersub(&now, &then, &td); 1128 if (td.tv_sec > 0) 1129 break; 1130 usleep(1000000 - td.tv_usec); 1131 } 1132 } 1133 } 1134 /* read CRLF after chunk*/ 1135 chunkdone: 1136 if (ischunked) { 1137 if (fgets(xferbuf, bufsize, fin) == NULL) 1138 break; 1139 if (strcmp(xferbuf, "\r\n") != 0) { 1140 warnx("Unexpected data following chunk"); 1141 goto cleanup_fetch_url; 1142 } 1143 } 1144 } while (ischunked); 1145 if (hash && !progress && bytes > 0) { 1146 if (bytes < mark) 1147 (void)putc('#', ttyout); 1148 (void)putc('\n', ttyout); 1149 } 1150 if (ferror(fin)) { 1151 warn("Reading file"); 1152 goto cleanup_fetch_url; 1153 } 1154 progressmeter(1); 1155 (void)fflush(fout); 1156 (void)xsignal(SIGINT, oldintr); 1157 if (oldintp) 1158 (void)xsignal(SIGPIPE, oldintp); 1159 if (closefunc == fclose && mtime != -1) { 1160 struct timeval tval[2]; 1161 1162 (void)gettimeofday(&tval[0], NULL); 1163 tval[1].tv_sec = mtime; 1164 tval[1].tv_usec = 0; 1165 (*closefunc)(fout); 1166 fout = NULL; 1167 1168 if (utimes(savefile, tval) == -1) { 1169 fprintf(ttyout, 1170 "Can't change modification time to %s", 1171 asctime(localtime(&mtime))); 1172 } 1173 } 1174 if (bytes > 0) 1175 ptransfer(0); 1176 1177 rval = 0; 1178 goto cleanup_fetch_url; 1179 1180 improper: 1181 warnx("Improper response from `%s'", host); 1182 1183 cleanup_fetch_url: 1184 if (fin != NULL) 1185 fclose(fin); 1186 else if (s != -1) 1187 close(s); 1188 if (closefunc != NULL && fout != NULL) 1189 (*closefunc)(fout); 1190 #ifdef NI_NUMERICHOST 1191 if (res != NULL) 1192 freeaddrinfo(res); 1193 #endif 1194 FREEPTR(savefile); 1195 FREEPTR(user); 1196 FREEPTR(pass); 1197 FREEPTR(host); 1198 FREEPTR(port); 1199 FREEPTR(path); 1200 FREEPTR(decodedpath); 1201 FREEPTR(puser); 1202 FREEPTR(ppass); 1203 FREEPTR(buf); 1204 FREEPTR(auth); 1205 FREEPTR(location); 1206 FREEPTR(message); 1207 return (rval); 1208 } 1209 1210 /* 1211 * Abort a HTTP retrieval 1212 */ 1213 void 1214 aborthttp(notused) 1215 int notused; 1216 { 1217 1218 alarmtimer(0); 1219 fputs("\nHTTP fetch aborted.\n", ttyout); 1220 longjmp(httpabort, 1); 1221 } 1222 1223 /* 1224 * Retrieve ftp URL or classic ftp argument using FTP. 1225 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1226 * is still open (e.g, ftp xfer with trailing /) 1227 */ 1228 static int 1229 fetch_ftp(url) 1230 const char *url; 1231 { 1232 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1233 char *host, *path, *dir, *file, *user, *pass; 1234 char *port; 1235 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1236 url_t urltype; 1237 1238 host = path = dir = file = user = pass = NULL; 1239 port = NULL; 1240 rval = 1; 1241 type = TYPE_I; 1242 1243 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1244 if ((parse_url(url, "URL", &urltype, &user, &pass, 1245 &host, &port, &path) == -1) || 1246 (user != NULL && *user == '\0') || 1247 (pass != NULL && *pass == '\0') || 1248 EMPTYSTRING(host)) { 1249 warnx("Invalid URL `%s'", url); 1250 goto cleanup_fetch_ftp; 1251 } 1252 url_decode(user); 1253 url_decode(pass); 1254 /* 1255 * Note: Don't url_decode(path) here. We need to keep the 1256 * distinction between "/" and "%2F" until later. 1257 */ 1258 1259 /* check for trailing ';type=[aid]' */ 1260 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1261 if (strcasecmp(cp, ";type=a") == 0) 1262 type = TYPE_A; 1263 else if (strcasecmp(cp, ";type=i") == 0) 1264 type = TYPE_I; 1265 else if (strcasecmp(cp, ";type=d") == 0) { 1266 warnx( 1267 "Directory listing via a URL is not supported"); 1268 goto cleanup_fetch_ftp; 1269 } else { 1270 warnx("Invalid suffix `%s' in URL `%s'", cp, 1271 url); 1272 goto cleanup_fetch_ftp; 1273 } 1274 *cp = 0; 1275 } 1276 } else { /* classic style `host:file' */ 1277 urltype = CLASSIC_URL_T; 1278 host = xstrdup(url); 1279 cp = strchr(host, ':'); 1280 if (cp != NULL) { 1281 *cp = '\0'; 1282 path = xstrdup(cp + 1); 1283 } 1284 } 1285 if (EMPTYSTRING(host)) 1286 goto cleanup_fetch_ftp; 1287 1288 /* Extract the file and (if present) directory name. */ 1289 dir = path; 1290 if (! EMPTYSTRING(dir)) { 1291 /* 1292 * If we are dealing with classic `host:path' syntax, 1293 * then a path of the form `/file' (resulting from 1294 * input of the form `host:/file') means that we should 1295 * do "CWD /" before retrieving the file. So we set 1296 * dir="/" and file="file". 1297 * 1298 * But if we are dealing with URLs like 1299 * `ftp://host/path' then a path of the form `/file' 1300 * (resulting from a URL of the form `ftp://host//file') 1301 * means that we should do `CWD ' (with an empty 1302 * argument) before retrieving the file. So we set 1303 * dir="" and file="file". 1304 * 1305 * If the path does not contain / at all, we set 1306 * dir=NULL. (We get a path without any slashes if 1307 * we are dealing with classic `host:file' or URL 1308 * `ftp://host/file'.) 1309 * 1310 * In all other cases, we set dir to a string that does 1311 * not include the final '/' that separates the dir part 1312 * from the file part of the path. (This will be the 1313 * empty string if and only if we are dealing with a 1314 * path of the form `/file' resulting from an URL of the 1315 * form `ftp://host//file'.) 1316 */ 1317 cp = strrchr(dir, '/'); 1318 if (cp == dir && urltype == CLASSIC_URL_T) { 1319 file = cp + 1; 1320 dir = "/"; 1321 } else if (cp != NULL) { 1322 *cp++ = '\0'; 1323 file = cp; 1324 } else { 1325 file = dir; 1326 dir = NULL; 1327 } 1328 } else 1329 dir = NULL; 1330 if (urltype == FTP_URL_T && file != NULL) { 1331 url_decode(file); 1332 /* but still don't url_decode(dir) */ 1333 } 1334 if (debug) 1335 fprintf(ttyout, 1336 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1337 user ? user : "<null>", pass ? pass : "<null>", 1338 host ? host : "<null>", port ? port : "<null>", 1339 path ? path : "<null>", 1340 dir ? dir : "<null>", file ? file : "<null>"); 1341 1342 dirhasglob = filehasglob = 0; 1343 if (doglob && urltype == CLASSIC_URL_T) { 1344 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1345 dirhasglob = 1; 1346 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1347 filehasglob = 1; 1348 } 1349 1350 /* Set up the connection */ 1351 if (connected) 1352 disconnect(0, NULL); 1353 xargv[0] = __progname; 1354 xargv[1] = host; 1355 xargv[2] = NULL; 1356 xargc = 2; 1357 if (port) { 1358 xargv[2] = port; 1359 xargv[3] = NULL; 1360 xargc = 3; 1361 } 1362 oautologin = autologin; 1363 if (user != NULL) 1364 autologin = 0; 1365 setpeer(xargc, xargv); 1366 autologin = oautologin; 1367 if ((connected == 0) || ((connected == 1) 1368 && !ftp_login(host, user, pass))) { 1369 warnx("Can't connect or login to host `%s'", host); 1370 goto cleanup_fetch_ftp; 1371 } 1372 1373 switch (type) { 1374 case TYPE_A: 1375 setascii(0, NULL); 1376 break; 1377 case TYPE_I: 1378 setbinary(0, NULL); 1379 break; 1380 default: 1381 errx(1, "fetch_ftp: unknown transfer type %d\n", type); 1382 } 1383 1384 /* 1385 * Change directories, if necessary. 1386 * 1387 * Note: don't use EMPTYSTRING(dir) below, because 1388 * dir=="" means something different from dir==NULL. 1389 */ 1390 if (dir != NULL && !dirhasglob) { 1391 char *nextpart; 1392 1393 /* 1394 * If we are dealing with a classic `host:path' (urltype 1395 * is CLASSIC_URL_T) then we have a raw directory 1396 * name (not encoded in any way) and we can change 1397 * directories in one step. 1398 * 1399 * If we are dealing with an `ftp://host/path' URL 1400 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1401 * send a separate CWD command for each unescaped "/" 1402 * in the path, and we have to interpret %hex escaping 1403 * *after* we find the slashes. It's possible to get 1404 * empty components here, (from multiple adjacent 1405 * slashes in the path) and RFC 1738 says that we should 1406 * still do `CWD ' (with a null argument) in such cases. 1407 * 1408 * Many ftp servers don't support `CWD ', so if there's an 1409 * error performing that command, bail out with a descriptive 1410 * message. 1411 * 1412 * Examples: 1413 * 1414 * host: dir="", urltype=CLASSIC_URL_T 1415 * logged in (to default directory) 1416 * host:file dir=NULL, urltype=CLASSIC_URL_T 1417 * "RETR file" 1418 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1419 * "CWD dir", logged in 1420 * ftp://host/ dir="", urltype=FTP_URL_T 1421 * logged in (to default directory) 1422 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1423 * "CWD dir", logged in 1424 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1425 * "RETR file" 1426 * ftp://host//file dir="", urltype=FTP_URL_T 1427 * "CWD ", "RETR file" 1428 * host:/file dir="/", urltype=CLASSIC_URL_T 1429 * "CWD /", "RETR file" 1430 * ftp://host///file dir="/", urltype=FTP_URL_T 1431 * "CWD ", "CWD ", "RETR file" 1432 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1433 * "CWD /", "RETR file" 1434 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1435 * "CWD foo", "RETR file" 1436 * ftp://host/foo/bar/file dir="foo/bar" 1437 * "CWD foo", "CWD bar", "RETR file" 1438 * ftp://host//foo/bar/file dir="/foo/bar" 1439 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1440 * ftp://host/foo//bar/file dir="foo//bar" 1441 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1442 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1443 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1444 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1445 * "CWD /foo", "CWD bar", "RETR file" 1446 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1447 * "CWD /foo/bar", "RETR file" 1448 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1449 * "RETR /foo/bar/file" 1450 * 1451 * Note that we don't need `dir' after this point. 1452 */ 1453 do { 1454 if (urltype == FTP_URL_T) { 1455 nextpart = strchr(dir, '/'); 1456 if (nextpart) { 1457 *nextpart = '\0'; 1458 nextpart++; 1459 } 1460 url_decode(dir); 1461 } else 1462 nextpart = NULL; 1463 if (debug) 1464 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1465 dir ? dir : "<null>", 1466 nextpart ? nextpart : "<null>"); 1467 if (urltype == FTP_URL_T || *dir != '\0') { 1468 xargv[0] = "cd"; 1469 xargv[1] = dir; 1470 xargv[2] = NULL; 1471 dirchange = 0; 1472 cd(2, xargv); 1473 if (! dirchange) { 1474 if (*dir == '\0' && code == 500) 1475 fprintf(stderr, 1476 "\n" 1477 "ftp: The `CWD ' command (without a directory), which is required by\n" 1478 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1479 " conflicts with the server's conformance to RFC 959.\n" 1480 " Try the same URL without the `//' in the URL pathname.\n" 1481 "\n"); 1482 goto cleanup_fetch_ftp; 1483 } 1484 } 1485 dir = nextpart; 1486 } while (dir != NULL); 1487 } 1488 1489 if (EMPTYSTRING(file)) { 1490 rval = -1; 1491 goto cleanup_fetch_ftp; 1492 } 1493 1494 if (dirhasglob) { 1495 (void)strlcpy(rempath, dir, sizeof(rempath)); 1496 (void)strlcat(rempath, "/", sizeof(rempath)); 1497 (void)strlcat(rempath, file, sizeof(rempath)); 1498 file = rempath; 1499 } 1500 1501 /* Fetch the file(s). */ 1502 xargc = 2; 1503 xargv[0] = "get"; 1504 xargv[1] = file; 1505 xargv[2] = NULL; 1506 if (dirhasglob || filehasglob) { 1507 int ointeractive; 1508 1509 ointeractive = interactive; 1510 interactive = 0; 1511 xargv[0] = "mget"; 1512 mget(xargc, xargv); 1513 interactive = ointeractive; 1514 } else { 1515 if (outfile == NULL) { 1516 cp = strrchr(file, '/'); /* find savefile */ 1517 if (cp != NULL) 1518 outfile = cp + 1; 1519 else 1520 outfile = file; 1521 } 1522 xargv[2] = (char *)outfile; 1523 xargv[3] = NULL; 1524 xargc++; 1525 if (restartautofetch) 1526 reget(xargc, xargv); 1527 else 1528 get(xargc, xargv); 1529 } 1530 1531 if ((code / 100) == COMPLETE) 1532 rval = 0; 1533 1534 cleanup_fetch_ftp: 1535 FREEPTR(host); 1536 FREEPTR(path); 1537 FREEPTR(user); 1538 FREEPTR(pass); 1539 return (rval); 1540 } 1541 1542 /* 1543 * Retrieve the given file to outfile. 1544 * Supports arguments of the form: 1545 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1546 * call fetch_ftp() 1547 * "http://host/path" call fetch_url() to use HTTP 1548 * "file:///path" call fetch_url() to copy 1549 * "about:..." print a message 1550 * 1551 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1552 * is still open (e.g, ftp xfer with trailing /) 1553 */ 1554 static int 1555 go_fetch(url) 1556 const char *url; 1557 { 1558 1559 #ifndef NO_ABOUT 1560 /* 1561 * Check for about:* 1562 */ 1563 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1564 url += sizeof(ABOUT_URL) -1; 1565 if (strcasecmp(url, "ftp") == 0) { 1566 fprintf(ttyout, "%s\n%s\n", 1567 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>.", 1568 "Execute `man ftp' for more details."); 1569 } else if (strcasecmp(url, "netbsd") == 0) { 1570 fprintf(ttyout, "%s\n%s\n", 1571 "NetBSD is a freely available and redistributable UNIX-like operating system.", 1572 "For more information, see http://www.netbsd.org/index.html"); 1573 } else { 1574 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1575 } 1576 return (0); 1577 } 1578 #endif /* NO_ABOUT */ 1579 1580 /* 1581 * Check for file:// and http:// URLs. 1582 */ 1583 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1584 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1585 return (fetch_url(url, NULL, NULL, NULL)); 1586 1587 /* 1588 * Try FTP URL-style and host:file arguments next. 1589 * If ftpproxy is set with an FTP URL, use fetch_url() 1590 * Othewise, use fetch_ftp(). 1591 */ 1592 if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1593 return (fetch_url(url, NULL, NULL, NULL)); 1594 1595 return (fetch_ftp(url)); 1596 } 1597 1598 /* 1599 * Retrieve multiple files from the command line, 1600 * calling go_fetch() for each file. 1601 * 1602 * If an ftp path has a trailing "/", the path will be cd-ed into and 1603 * the connection remains open, and the function will return -1 1604 * (to indicate the connection is alive). 1605 * If an error occurs the return value will be the offset+1 in 1606 * argv[] of the file that caused a problem (i.e, argv[x] 1607 * returns x+1) 1608 * Otherwise, 0 is returned if all files retrieved successfully. 1609 */ 1610 int 1611 auto_fetch(argc, argv) 1612 int argc; 1613 char *argv[]; 1614 { 1615 volatile int argpos; 1616 int rval; 1617 1618 argpos = 0; 1619 1620 if (setjmp(toplevel)) { 1621 if (connected) 1622 disconnect(0, NULL); 1623 return (argpos + 1); 1624 } 1625 (void)xsignal(SIGINT, (sig_t)intr); 1626 (void)xsignal(SIGPIPE, (sig_t)lostpeer); 1627 1628 /* 1629 * Loop through as long as there's files to fetch. 1630 */ 1631 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1632 if (strchr(argv[argpos], ':') == NULL) 1633 break; 1634 redirect_loop = 0; 1635 anonftp = 1; /* Handle "automatic" transfers. */ 1636 rval = go_fetch(argv[argpos]); 1637 if (outfile != NULL && strcmp(outfile, "-") != 0 1638 && outfile[0] != '|') 1639 outfile = NULL; 1640 if (rval > 0) 1641 rval = argpos + 1; 1642 } 1643 1644 if (connected && rval != -1) 1645 disconnect(0, NULL); 1646 return (rval); 1647 } 1648
Indexes created Mon Sep 22 13:09:51 GMT 2025