fetch.c revision 1.71
1 /* $NetBSD: fetch.c,v 1.71 1999/09/21 13:17:22 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 1.71 1999/09/21 13:17:22 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 <signal.h> 66 #include <stdio.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <unistd.h> 70 #include <time.h> 71 #include <util.h> 72 73 #include "ftp_var.h" 74 75 typedef enum { 76 UNKNOWN_URL_T=-1, 77 HTTP_URL_T, 78 FTP_URL_T, 79 FILE_URL_T, 80 CLASSIC_URL_T 81 } url_t; 82 83 void aborthttp __P((int)); 84 static int auth_url __P((const char *, char **, const char *, 85 const char *)); 86 static void base64_encode __P((const char *, size_t, char *)); 87 static int go_fetch __P((const char *)); 88 static int fetch_ftp __P((const char *)); 89 static int fetch_url __P((const char *, const char *, char *, char *)); 90 static int parse_url __P((const char *, const char *, url_t *, char **, 91 char **, char **, char **, char **)); 92 static void url_decode __P((char *)); 93 94 static int redirect_loop; 95 96 97 #define ABOUT_URL "about:" /* propaganda */ 98 #define FILE_URL "file://" /* file URL prefix */ 99 #define FTP_URL "ftp://" /* ftp URL prefix */ 100 #define HTTP_URL "http://" /* http URL prefix */ 101 102 103 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 104 #define FREEPTR(x) if ((x) != NULL) { free(x); (x) = NULL; } 105 106 /* 107 * Generate authorization response based on given authentication challenge. 108 * Returns -1 if an error occurred, otherwise 0. 109 * Sets response to a malloc(3)ed string; caller should free. 110 */ 111 static int 112 auth_url(challenge, response, guser, gpass) 113 const char *challenge; 114 char **response; 115 const char *guser; 116 const char *gpass; 117 { 118 char *cp, *ep, *clear, *line, *realm, *scheme; 119 char user[BUFSIZ], *pass; 120 int rval; 121 size_t len; 122 123 *response = NULL; 124 clear = realm = scheme = NULL; 125 rval = -1; 126 line = xstrdup(challenge); 127 cp = line; 128 129 if (debug) 130 fprintf(ttyout, "auth_url: challenge `%s'\n", challenge); 131 132 scheme = strsep(&cp, " "); 133 #define SCHEME_BASIC "Basic" 134 if (strncasecmp(scheme, SCHEME_BASIC, sizeof(SCHEME_BASIC) - 1) != 0) { 135 warnx("Unsupported WWW Authentication challenge - `%s'", 136 challenge); 137 goto cleanup_auth_url; 138 } 139 cp += strspn(cp, " "); 140 141 #define REALM "realm=\"" 142 if (strncasecmp(cp, REALM, sizeof(REALM) - 1) == 0) 143 cp += sizeof(REALM) - 1; 144 else { 145 warnx("Unsupported WWW Authentication challenge - `%s'", 146 challenge); 147 goto cleanup_auth_url; 148 } 149 if ((ep = strchr(cp, '\"')) != NULL) { 150 size_t len = ep - cp; 151 152 realm = (char *)xmalloc(len + 1); 153 strncpy(realm, cp, len); 154 realm[len] = '\0'; 155 } else { 156 warnx("Unsupported WWW Authentication challenge - `%s'", 157 challenge); 158 goto cleanup_auth_url; 159 } 160 161 if (guser != NULL) { 162 strncpy(user, guser, sizeof(user) - 1); 163 user[sizeof(user) - 1] = '\0'; 164 } else { 165 fprintf(ttyout, "Username for `%s': ", realm); 166 (void)fflush(ttyout); 167 if (fgets(user, sizeof(user) - 1, stdin) == NULL) 168 goto cleanup_auth_url; 169 user[strlen(user) - 1] = '\0'; 170 } 171 if (gpass != NULL) 172 pass = (char *)gpass; 173 else 174 pass = getpass("Password: "); 175 176 len = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 177 clear = (char *)xmalloc(len); 178 snprintf(clear, len, "%s:%s", user, pass); 179 if (gpass == NULL) 180 memset(pass, '\0', strlen(pass)); 181 182 /* scheme + " " + enc + "\0" */ 183 len = strlen(scheme) + 1 + (len + 2) * 4 / 3 + 1; 184 *response = (char *)xmalloc(len); 185 len = snprintf(*response, len, "%s ", scheme); 186 base64_encode(clear, strlen(clear), *response + len); 187 memset(clear, '\0', strlen(clear)); 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 = 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 strncpy(thost, url, len); 339 thost[len] = '\0'; 340 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 341 ep++; 342 *path = xstrdup(ep); 343 } 344 345 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 346 if (cp != NULL) { 347 if (*type == FTP_URL_T) 348 anonftp = 0; /* disable anonftp */ 349 *user = thost; 350 *cp = '\0'; 351 thost = xstrdup(cp + 1); 352 cp = strchr(*user, ':'); 353 if (cp != NULL) { 354 *cp = '\0'; 355 *pass = xstrdup(cp + 1); 356 } 357 } 358 359 #ifdef INET6 360 /* 361 * Check if thost is an encoded IPv6 address, as per 362 * draft-ietf-ipngwg-url-literal-01.txt: 363 * `[' ipv6-address ']' 364 */ 365 if (*thost == '[') { 366 cp = thost + 1; 367 if ((ep = strchr(cp, ']')) == NULL || 368 (ep[1] != '\0' && ep[1] != '\0')) { 369 warnx("Invalid address `%s' in %s `%s'", 370 thost, desc, url); 371 goto cleanup_parse_url; 372 } 373 len = ep - cp; /* change `[xxx]' -> `xxx' */ 374 memmove(thost, thost + 1, len); 375 thost[len] = '\0'; 376 if (! isipv6addr(thost)) { 377 warnx("Invalid IPv6 address `%s' in %s `%s'", 378 thost, desc, url); 379 goto cleanup_parse_url; 380 } 381 cp = ep + 1; 382 if (*cp == ':') 383 cp++; 384 else 385 cp = NULL; 386 } else 387 #endif /* INET6 */ 388 if ((cp = strchr(thost, ':')) != NULL) 389 *cp++ = '\0'; 390 *host = thost; 391 392 /* look for [:port] */ 393 if (cp != NULL) { 394 long nport; 395 396 nport = strtol(cp, &ep, 10); 397 if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 398 warnx("Invalid port `%s' in %s `%s'", cp, desc, url); 399 goto cleanup_parse_url; 400 } 401 tport = cp; 402 } 403 if (tport != NULL); 404 *port = xstrdup(tport); 405 406 if (debug) 407 fprintf(ttyout, 408 "parse_url: user `%s' pass `%s' host %s:%s path `%s'\n", 409 *user ? *user : "<null>", *pass ? *pass : "<null>", 410 *host ? *host : "<null>", *port ? *port : "<null>", 411 *path ? *path : "<null>"); 412 413 return (0); 414 } 415 416 417 jmp_buf httpabort; 418 419 /* 420 * Retrieve URL, via a proxy if necessary, using HTTP. 421 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 422 * http_proxy as appropriate. 423 * Supports HTTP redirects. 424 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 425 * is still open (e.g, ftp xfer with trailing /) 426 */ 427 static int 428 fetch_url(url, proxyenv, proxyauth, wwwauth) 429 const char *url; 430 const char *proxyenv; 431 char *proxyauth; 432 char *wwwauth; 433 { 434 #ifdef NI_NUMERICHOST 435 struct addrinfo hints, *res = NULL; 436 int error; 437 #else 438 struct sockaddr_in sin; 439 struct hostent *hp = NULL; 440 #endif 441 volatile sig_t oldintr, oldintp; 442 volatile int s; 443 int ischunked, isproxy, rval, hcode; 444 size_t len; 445 char *cp, *ep, *buf, *savefile; 446 char *auth, *location, *message; 447 char *user, *pass, *host, *port, *path, *decodedpath; 448 char *puser, *ppass; 449 off_t hashbytes; 450 int (*closefunc) __P((FILE *)); 451 FILE *fin, *fout; 452 time_t mtime; 453 url_t urltype; 454 in_port_t portnum; 455 456 closefunc = NULL; 457 fin = fout = NULL; 458 s = -1; 459 buf = savefile = NULL; 460 auth = location = message = NULL; 461 ischunked = isproxy = hcode = 0; 462 rval = 1; 463 user = pass = host = path = decodedpath = puser = ppass = NULL; 464 465 #ifdef __GNUC__ /* shut up gcc warnings */ 466 (void)&closefunc; 467 (void)&fin; 468 (void)&fout; 469 (void)&buf; 470 (void)&savefile; 471 (void)&rval; 472 (void)&isproxy; 473 (void)&hcode; 474 (void)&ischunked; 475 (void)&message; 476 (void)&location; 477 (void)&auth; 478 (void)&decodedpath; 479 #endif 480 481 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, &path) 482 == -1) 483 goto cleanup_fetch_url; 484 portnum = strtol(port, &ep, 10); 485 if (*ep || port == ep) { 486 struct servent *svp = getservbyname(port, "tcp"); 487 if (svp != NULL) 488 portnum = ntohs(svp->s_port); 489 } 490 491 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 492 && strcasecmp(host, "localhost") != 0) { 493 warnx("No support for non local file URL `%s'", url); 494 goto cleanup_fetch_url; 495 } 496 497 if (EMPTYSTRING(path)) { 498 if (urltype == FTP_URL_T) { 499 rval = fetch_ftp(url); 500 goto cleanup_fetch_url; 501 } 502 if (urltype != HTTP_URL_T || outfile == NULL) { 503 warnx("Invalid URL (no file after host) `%s'", url); 504 goto cleanup_fetch_url; 505 } 506 } 507 508 decodedpath = xstrdup(path); 509 url_decode(decodedpath); 510 511 if (outfile) 512 savefile = xstrdup(outfile); 513 else { 514 cp = strrchr(decodedpath, '/'); /* find savefile */ 515 if (cp != NULL) 516 savefile = xstrdup(cp + 1); 517 else 518 savefile = xstrdup(decodedpath); 519 } 520 if (EMPTYSTRING(savefile)) { 521 if (urltype == FTP_URL_T) { 522 rval = fetch_ftp(url); 523 goto cleanup_fetch_url; 524 } 525 warnx("Invalid URL (no file after directory) `%s'", url); 526 goto cleanup_fetch_url; 527 } else { 528 if (debug) 529 fprintf(ttyout, "got savefile as `%s'\n", savefile); 530 } 531 532 filesize = -1; 533 mtime = -1; 534 if (urltype == FILE_URL_T) { /* file:// URLs */ 535 struct stat sb; 536 537 direction = "copied"; 538 fin = fopen(decodedpath, "r"); 539 if (fin == NULL) { 540 warn("Cannot open file `%s'", decodedpath); 541 goto cleanup_fetch_url; 542 } 543 if (fstat(fileno(fin), &sb) == 0) { 544 mtime = sb.st_mtime; 545 filesize = sb.st_size; 546 } 547 if (verbose) 548 fprintf(ttyout, "Copying %s\n", decodedpath); 549 } else { /* ftp:// or http:// URLs */ 550 char *leading; 551 int hasleading; 552 553 if (proxyenv == NULL) { 554 if (urltype == HTTP_URL_T) 555 proxyenv = httpproxy; 556 else if (urltype == FTP_URL_T) 557 proxyenv = ftpproxy; 558 } 559 direction = "retrieved"; 560 if (proxyenv != NULL) { /* use proxy */ 561 url_t purltype; 562 char *phost, *ppath; 563 char *pport; 564 565 isproxy = 1; 566 567 /* check URL against list of no_proxied sites */ 568 if (no_proxy != NULL) { 569 char *np, *np_copy; 570 long np_port; 571 size_t hlen, plen; 572 573 np_copy = xstrdup(no_proxy); 574 hlen = strlen(host); 575 while ((cp = strsep(&np_copy, " ,")) != NULL) { 576 if (*cp == '\0') 577 continue; 578 if ((np = strrchr(cp, ':')) != NULL) { 579 *np = '\0'; 580 np_port = 581 strtol(np + 1, &ep, 10); 582 if (*ep != '\0') 583 continue; 584 if (portnum != 585 htons((in_port_t)np_port)) 586 continue; 587 } 588 plen = strlen(cp); 589 if (strncasecmp(host + hlen - plen, 590 cp, plen) == 0) { 591 isproxy = 0; 592 break; 593 } 594 } 595 FREEPTR(np_copy); 596 } 597 598 if (isproxy) { 599 if (parse_url(proxyenv, "proxy URL", &purltype, 600 &puser, &ppass, &phost, &pport, &ppath) 601 == -1) 602 goto cleanup_fetch_url; 603 604 if ((purltype != HTTP_URL_T 605 && purltype != FTP_URL_T) || 606 EMPTYSTRING(phost) || 607 (! EMPTYSTRING(ppath) 608 && strcmp(ppath, "/") != 0)) { 609 warnx("Malformed proxy URL `%s'", 610 proxyenv); 611 FREEPTR(phost); 612 FREEPTR(pport); 613 FREEPTR(ppath); 614 goto cleanup_fetch_url; 615 } 616 617 FREEPTR(host); 618 host = phost; 619 FREEPTR(port); 620 port = pport; 621 FREEPTR(path); 622 path = xstrdup(url); 623 FREEPTR(ppath); 624 } 625 } /* proxyenv != NULL */ 626 627 #ifndef NI_NUMERICHOST 628 memset(&sin, 0, sizeof(sin)); 629 sin.sin_family = AF_INET; 630 631 if (isdigit((unsigned char)host[0])) { 632 if (inet_aton(host, &sin.sin_addr) == 0) { 633 warnx("Invalid IP address `%s'", host); 634 goto cleanup_fetch_url; 635 } 636 } else { 637 hp = gethostbyname(host); 638 if (hp == NULL) { 639 warnx("%s: %s", host, hstrerror(h_errno)); 640 goto cleanup_fetch_url; 641 } 642 if (hp->h_addrtype != AF_INET) { 643 warnx("`%s': not an Internet address?", host); 644 goto cleanup_fetch_url; 645 } 646 if (hp->h_length > sizeof(sin.sin_addr)) 647 hp->h_length = sizeof(sin.sin_addr); 648 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 649 } 650 651 if (port == NULL) { 652 warnx("Unknown port for URL `%s'", url); 653 goto cleanup_fetch_url; 654 } 655 portnum = strtol(port, &ep, 10); 656 if (*ep || port == ep) { 657 struct servent *svp = getservbyname(port, "tcp"); 658 if (svp != NULL) 659 portnum = ntohs(svp->s_port); 660 } 661 sin.sin_port = portnum; 662 663 s = socket(AF_INET, SOCK_STREAM, 0); 664 if (s == -1) { 665 warn("Can't create socket"); 666 goto cleanup_fetch_url; 667 } 668 669 while (xconnect(s, (struct sockaddr *)&sin, 670 sizeof(sin)) == -1) { 671 if (errno == EINTR) 672 continue; 673 if (hp && hp->h_addr_list[1]) { 674 int oerrno = errno; 675 char *ia; 676 677 ia = inet_ntoa(sin.sin_addr); 678 errno = oerrno; 679 warn("Connect to address `%s'", ia); 680 hp->h_addr_list++; 681 memcpy(&sin.sin_addr, hp->h_addr_list[0], 682 (size_t)hp->h_length); 683 if (verbose) 684 fprintf(ttyout, "Trying %s...\n", 685 inet_ntoa(sin.sin_addr)); 686 (void)close(s); 687 s = socket(AF_INET, SOCK_STREAM, 0); 688 if (s < 0) { 689 warn("Can't create socket"); 690 goto cleanup_fetch_url; 691 } 692 continue; 693 } 694 warn("Can't connect to `%s'", host); 695 goto cleanup_fetch_url; 696 } 697 #else 698 memset(&hints, 0, sizeof(hints)); 699 hints.ai_flags = 0; 700 hints.ai_family = AF_UNSPEC; 701 hints.ai_socktype = SOCK_STREAM; 702 hints.ai_protocol = 0; 703 error = getaddrinfo(host, port, &hints, &res); 704 if (error) { 705 warnx(gai_strerror(error)); 706 goto cleanup_fetch_url; 707 } 708 709 while (1) { 710 s = socket(res->ai_family, 711 res->ai_socktype, res->ai_protocol); 712 if (s < 0) { 713 warn("Can't create socket"); 714 goto cleanup_fetch_url; 715 } 716 717 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 718 char hbuf[MAXHOSTNAMELEN]; 719 getnameinfo(res->ai_addr, res->ai_addrlen, 720 hbuf, sizeof(hbuf), NULL, 0, 721 NI_NUMERICHOST); 722 warn("Connect to address `%s'", hbuf); 723 close(s); 724 res = res->ai_next; 725 if (res) { 726 getnameinfo(res->ai_addr, 727 res->ai_addrlen, hbuf, sizeof(hbuf), 728 NULL, 0, NI_NUMERICHOST); 729 if (verbose) 730 fprintf(ttyout, 731 "Trying %s...\n", hbuf); 732 continue; 733 } 734 warn("Can't connect to %s", host); 735 goto cleanup_fetch_url; 736 } 737 738 break; 739 } 740 #endif 741 742 743 fin = fdopen(s, "r+"); 744 /* 745 * Construct and send the request. 746 */ 747 if (verbose) 748 fprintf(ttyout, "Requesting %s\n", url); 749 leading = " ("; 750 hasleading = 0; 751 if (isproxy) { 752 if (verbose) { 753 fprintf(ttyout, "%svia %s:%s", leading, 754 host, port); 755 leading = ", "; 756 hasleading++; 757 } 758 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 759 if (flushcache) 760 fprintf(fin, "Pragma: no-cache\r\n"); 761 } else { 762 struct utsname unam; 763 764 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 765 fprintf(fin, "Host: %s:%s\r\n", host, port); 766 fprintf(fin, "Accept: */*\r\n"); 767 if (uname(&unam) != -1) { 768 fprintf(fin, "User-Agent: %s-%s/ftp\r\n", 769 unam.sysname, unam.release); 770 } 771 fprintf(fin, "Connection: close\r\n"); 772 if (flushcache) 773 fprintf(fin, "Cache-Control: no-cache\r\n"); 774 } 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: %qd\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 = mkgmtime(&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) != NULL 994 && tolower(reply[0]) != 'y') 995 goto cleanup_fetch_url; 996 auser = NULL; 997 apass = NULL; 998 } 999 if (auth_url(auth, authp, auser, apass) == 0) { 1000 rval = fetch_url(url, proxyenv, 1001 proxyauth, wwwauth); 1002 memset(*authp, '\0', strlen(*authp)); 1003 FREEPTR(*authp); 1004 } 1005 goto cleanup_fetch_url; 1006 } 1007 default: 1008 if (message) 1009 warnx("Error retrieving file - `%s'", message); 1010 else 1011 warnx("Unknown error retrieving file"); 1012 goto cleanup_fetch_url; 1013 } 1014 } /* end of ftp:// or http:// specific setup */ 1015 1016 oldintr = oldintp = NULL; 1017 1018 /* Open the output file. */ 1019 if (strcmp(savefile, "-") == 0) { 1020 fout = stdout; 1021 } else if (*savefile == '|') { 1022 oldintp = signal(SIGPIPE, SIG_IGN); 1023 fout = popen(savefile + 1, "w"); 1024 if (fout == NULL) { 1025 warn("Can't run `%s'", savefile + 1); 1026 goto cleanup_fetch_url; 1027 } 1028 closefunc = pclose; 1029 } else { 1030 fout = fopen(savefile, "w"); 1031 if (fout == NULL) { 1032 warn("Can't open `%s'", savefile); 1033 goto cleanup_fetch_url; 1034 } 1035 closefunc = fclose; 1036 } 1037 1038 /* Trap signals */ 1039 if (setjmp(httpabort)) { 1040 if (oldintr) 1041 (void)signal(SIGINT, oldintr); 1042 if (oldintp) 1043 (void)signal(SIGPIPE, oldintp); 1044 goto cleanup_fetch_url; 1045 } 1046 oldintr = signal(SIGINT, aborthttp); 1047 1048 bytes = 0; 1049 hashbytes = mark; 1050 progressmeter(-1); 1051 1052 /* Finally, suck down the file. */ 1053 buf = xmalloc(BUFSIZ + 1); 1054 do { 1055 ssize_t chunksize; 1056 1057 chunksize = 0; 1058 /* read chunksize */ 1059 if (ischunked) { 1060 if (fgets(buf, BUFSIZ, fin) == NULL) { 1061 warnx("Unexpected EOF reading chunksize"); 1062 goto cleanup_fetch_url; 1063 } 1064 chunksize = strtol(buf, &ep, 16); 1065 if (strcmp(ep, "\r\n") != 0) { 1066 warnx("Unexpected data following chunksize"); 1067 goto cleanup_fetch_url; 1068 } 1069 if (debug) 1070 fprintf(ttyout, 1071 #ifndef NO_QUAD 1072 "got chunksize of %qd\n", 1073 (long long)chunksize); 1074 #else 1075 "got chunksize of %ld\n", 1076 (long)chunksize); 1077 #endif 1078 if (chunksize == 0) 1079 break; 1080 } 1081 /* transfer file or chunk */ 1082 while (1) { 1083 struct timeval then, now, td; 1084 off_t bufrem; 1085 1086 if (rate_get) 1087 (void)gettimeofday(&then, NULL); 1088 bufrem = rate_get ? rate_get : BUFSIZ; 1089 while (bufrem > 0) { 1090 len = fread(buf, sizeof(char), 1091 ischunked ? MIN(chunksize, bufrem) : BUFSIZ, 1092 fin); 1093 if (len <= 0) 1094 goto chunkdone; 1095 bytes += len; 1096 bufrem -= len; 1097 if (fwrite(buf, sizeof(char), len, fout) 1098 != len) { 1099 warn("Writing `%s'", savefile); 1100 goto cleanup_fetch_url; 1101 } 1102 } 1103 if (hash && !progress) { 1104 while (bytes >= hashbytes) { 1105 (void)putc('#', ttyout); 1106 hashbytes += mark; 1107 } 1108 (void)fflush(ttyout); 1109 } 1110 if (ischunked) { 1111 chunksize -= len; 1112 if (chunksize <= 0) 1113 goto chunkdone; 1114 } 1115 if (rate_get) { 1116 while (1) { 1117 (void)gettimeofday(&now, NULL); 1118 timersub(&now, &then, &td); 1119 if (td.tv_sec > 0) 1120 break; 1121 usleep(1000000 - td.tv_usec); 1122 } 1123 } 1124 } 1125 /* read CRLF after chunk*/ 1126 chunkdone: 1127 if (ischunked) { 1128 if (fgets(buf, BUFSIZ, fin) == NULL) 1129 break; 1130 if (strcmp(buf, "\r\n") != 0) { 1131 warnx("Unexpected data following chunk"); 1132 goto cleanup_fetch_url; 1133 } 1134 } 1135 } while (ischunked); 1136 if (hash && !progress && bytes > 0) { 1137 if (bytes < mark) 1138 (void)putc('#', ttyout); 1139 (void)putc('\n', ttyout); 1140 } 1141 if (ferror(fin)) { 1142 warn("Reading file"); 1143 goto cleanup_fetch_url; 1144 } 1145 progressmeter(1); 1146 (void)fflush(fout); 1147 (void)signal(SIGINT, oldintr); 1148 if (oldintp) 1149 (void)signal(SIGPIPE, oldintp); 1150 if (closefunc == fclose && mtime != -1) { 1151 struct timeval tval[2]; 1152 1153 (void)gettimeofday(&tval[0], NULL); 1154 tval[1].tv_sec = mtime; 1155 tval[1].tv_usec = 0; 1156 (*closefunc)(fout); 1157 fout = NULL; 1158 1159 if (utimes(savefile, tval) == -1) { 1160 fprintf(ttyout, 1161 "Can't change modification time to %s", 1162 asctime(localtime(&mtime))); 1163 } 1164 } 1165 if (bytes > 0) 1166 ptransfer(0); 1167 1168 rval = 0; 1169 goto cleanup_fetch_url; 1170 1171 improper: 1172 warnx("Improper response from `%s'", host); 1173 1174 cleanup_fetch_url: 1175 resetsockbufsize(); 1176 if (fin != NULL) 1177 fclose(fin); 1178 else if (s != -1) 1179 close(s); 1180 if (closefunc != NULL && fout != NULL) 1181 (*closefunc)(fout); 1182 #ifdef NI_NUMERICHOST 1183 if (res != NULL) 1184 freeaddrinfo(res); 1185 #endif 1186 FREEPTR(savefile); 1187 FREEPTR(user); 1188 FREEPTR(pass); 1189 FREEPTR(host); 1190 FREEPTR(port); 1191 FREEPTR(path); 1192 FREEPTR(decodedpath); 1193 FREEPTR(puser); 1194 FREEPTR(ppass); 1195 FREEPTR(buf); 1196 FREEPTR(auth); 1197 FREEPTR(location); 1198 FREEPTR(message); 1199 return (rval); 1200 } 1201 1202 /* 1203 * Abort a HTTP retrieval 1204 */ 1205 void 1206 aborthttp(notused) 1207 int notused; 1208 { 1209 1210 alarmtimer(0); 1211 fputs("\nHTTP fetch aborted.\n", ttyout); 1212 longjmp(httpabort, 1); 1213 } 1214 1215 /* 1216 * Retrieve ftp URL or classic ftp argument using FTP. 1217 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1218 * is still open (e.g, ftp xfer with trailing /) 1219 */ 1220 static int 1221 fetch_ftp(url) 1222 const char *url; 1223 { 1224 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1225 char *host, *path, *dir, *file, *user, *pass; 1226 char *port; 1227 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1228 url_t urltype; 1229 1230 host = path = dir = file = user = pass = NULL; 1231 port = NULL; 1232 rval = 1; 1233 type = TYPE_I; 1234 1235 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1236 if ((parse_url(url, "URL", &urltype, &user, &pass, 1237 &host, &port, &path) == -1) || 1238 (user != NULL && *user == '\0') || 1239 (pass != NULL && *pass == '\0') || 1240 EMPTYSTRING(host)) { 1241 warnx("Invalid URL `%s'", url); 1242 goto cleanup_fetch_ftp; 1243 } 1244 url_decode(user); 1245 url_decode(pass); 1246 /* 1247 * Note: Don't url_decode(path) here. We need to keep the 1248 * distinction between "/" and "%2F" until later. 1249 */ 1250 1251 /* check for trailing ';type=[aid]' */ 1252 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1253 if (strcasecmp(cp, ";type=a") == 0) 1254 type = TYPE_A; 1255 else if (strcasecmp(cp, ";type=i") == 0) 1256 type = TYPE_I; 1257 else if (strcasecmp(cp, ";type=d") == 0) { 1258 warnx( 1259 "Directory listing via a URL is not supported"); 1260 goto cleanup_fetch_ftp; 1261 } else { 1262 warnx("Invalid suffix `%s' in URL `%s'", cp, 1263 url); 1264 goto cleanup_fetch_ftp; 1265 } 1266 *cp = 0; 1267 } 1268 } else { /* classic style `host:file' */ 1269 urltype = CLASSIC_URL_T; 1270 host = xstrdup(url); 1271 cp = strchr(host, ':'); 1272 if (cp != NULL) { 1273 *cp = '\0'; 1274 path = xstrdup(cp + 1); 1275 } 1276 } 1277 if (EMPTYSTRING(host)) 1278 goto cleanup_fetch_ftp; 1279 1280 /* Extract the file and (if present) directory name. */ 1281 dir = path; 1282 if (! EMPTYSTRING(dir)) { 1283 /* 1284 * If we are dealing with classic `host:path' syntax, 1285 * then a path of the form `/file' (resulting from 1286 * input of the form `host:/file') means that we should 1287 * do "CWD /" before retrieving the file. So we set 1288 * dir="/" and file="file". 1289 * 1290 * But if we are dealing with URLs like 1291 * `ftp://host/path' then a path of the form `/file' 1292 * (resulting from a URL of the form `ftp://host//file') 1293 * means that we should do `CWD ' (with an empty 1294 * argument) before retrieving the file. So we set 1295 * dir="" and file="file". 1296 * 1297 * If the path does not contain / at all, we set 1298 * dir=NULL. (We get a path without any slashes if 1299 * we are dealing with classic `host:file' or URL 1300 * `ftp://host/file'.) 1301 * 1302 * In all other cases, we set dir to a string that does 1303 * not include the final '/' that separates the dir part 1304 * from the file part of the path. (This will be the 1305 * empty string if and only if we are dealing with a 1306 * path of the form `/file' resulting from an URL of the 1307 * form `ftp://host//file'.) 1308 */ 1309 cp = strrchr(dir, '/'); 1310 if (cp == dir && urltype == CLASSIC_URL_T) { 1311 file = cp + 1; 1312 dir = "/"; 1313 } else if (cp != NULL) { 1314 *cp++ = '\0'; 1315 file = cp; 1316 } else { 1317 file = dir; 1318 dir = NULL; 1319 } 1320 } else 1321 dir = NULL; 1322 if (urltype == FTP_URL_T && file != NULL) { 1323 url_decode(file); 1324 /* but still don't url_decode(dir) */ 1325 } 1326 if (debug) 1327 fprintf(ttyout, 1328 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1329 user ? user : "<null>", pass ? pass : "<null>", 1330 host ? host : "<null>", port ? port : "<null>", 1331 path ? path : "<null>", 1332 dir ? dir : "<null>", file ? file : "<null>"); 1333 1334 dirhasglob = filehasglob = 0; 1335 if (doglob && urltype == CLASSIC_URL_T) { 1336 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1337 dirhasglob = 1; 1338 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1339 filehasglob = 1; 1340 } 1341 1342 /* Set up the connection */ 1343 if (connected) 1344 disconnect(0, NULL); 1345 xargv[0] = __progname; 1346 xargv[1] = host; 1347 xargv[2] = NULL; 1348 xargc = 2; 1349 if (port) { 1350 xargv[2] = port; 1351 xargv[3] = NULL; 1352 xargc = 3; 1353 } 1354 oautologin = autologin; 1355 if (user != NULL) 1356 autologin = 0; 1357 setpeer(xargc, xargv); 1358 autologin = oautologin; 1359 if ((connected == 0) || ((connected == 1) 1360 && !ftp_login(host, user, pass))) { 1361 warnx("Can't connect or login to host `%s'", host); 1362 goto cleanup_fetch_ftp; 1363 } 1364 1365 switch (type) { 1366 case TYPE_A: 1367 setascii(0, NULL); 1368 break; 1369 case TYPE_I: 1370 setbinary(0, NULL); 1371 break; 1372 default: 1373 errx(1, "fetch_ftp: unknown transfer type %d\n", type); 1374 } 1375 1376 /* 1377 * Change directories, if necessary. 1378 * 1379 * Note: don't use EMPTYSTRING(dir) below, because 1380 * dir=="" means something different from dir==NULL. 1381 */ 1382 if (dir != NULL && !dirhasglob) { 1383 char *nextpart; 1384 1385 /* 1386 * If we are dealing with a classic `host:path' (urltype 1387 * is CLASSIC_URL_T) then we have a raw directory 1388 * name (not encoded in any way) and we can change 1389 * directories in one step. 1390 * 1391 * If we are dealing with an `ftp://host/path' URL 1392 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1393 * send a separate CWD command for each unescaped "/" 1394 * in the path, and we have to interpret %hex escaping 1395 * *after* we find the slashes. It's possible to get 1396 * empty components here, (from multiple adjacent 1397 * slashes in the path) and RFC 1738 says that we should 1398 * still do `CWD ' (with a null argument) in such cases. 1399 * 1400 * Many ftp servers don't support `CWD ', so if there's an 1401 * error performing that command, bail out with a descriptive 1402 * message. 1403 * 1404 * Examples: 1405 * 1406 * host: dir="", urltype=CLASSIC_URL_T 1407 * logged in (to default directory) 1408 * host:file dir=NULL, urltype=CLASSIC_URL_T 1409 * "RETR file" 1410 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1411 * "CWD dir", logged in 1412 * ftp://host/ dir="", urltype=FTP_URL_T 1413 * logged in (to default directory) 1414 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1415 * "CWD dir", logged in 1416 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1417 * "RETR file" 1418 * ftp://host//file dir="", urltype=FTP_URL_T 1419 * "CWD ", "RETR file" 1420 * host:/file dir="/", urltype=CLASSIC_URL_T 1421 * "CWD /", "RETR file" 1422 * ftp://host///file dir="/", urltype=FTP_URL_T 1423 * "CWD ", "CWD ", "RETR file" 1424 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1425 * "CWD /", "RETR file" 1426 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1427 * "CWD foo", "RETR file" 1428 * ftp://host/foo/bar/file dir="foo/bar" 1429 * "CWD foo", "CWD bar", "RETR file" 1430 * ftp://host//foo/bar/file dir="/foo/bar" 1431 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1432 * ftp://host/foo//bar/file dir="foo//bar" 1433 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1434 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1435 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1436 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1437 * "CWD /foo", "CWD bar", "RETR file" 1438 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1439 * "CWD /foo/bar", "RETR file" 1440 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1441 * "RETR /foo/bar/file" 1442 * 1443 * Note that we don't need `dir' after this point. 1444 */ 1445 do { 1446 if (urltype == FTP_URL_T) { 1447 nextpart = strchr(dir, '/'); 1448 if (nextpart) { 1449 *nextpart = '\0'; 1450 nextpart++; 1451 } 1452 url_decode(dir); 1453 } else 1454 nextpart = NULL; 1455 if (debug) 1456 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1457 dir ? dir : "<null>", 1458 nextpart ? nextpart : "<null>"); 1459 if (urltype == FTP_URL_T || *dir != '\0') { 1460 xargv[0] = "cd"; 1461 xargv[1] = dir; 1462 xargv[2] = NULL; 1463 dirchange = 0; 1464 cd(2, xargv); 1465 if (! dirchange) { 1466 if (*dir == '\0' && code == 500) 1467 fprintf(stderr, 1468 "\n" 1469 "ftp: The `CWD ' command (without a directory), which is required by\n" 1470 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1471 " conflicts with the server's conformance to RFC 959.\n" 1472 " Try the same URL without the `//' in the URL pathname.\n" 1473 "\n"); 1474 goto cleanup_fetch_ftp; 1475 } 1476 } 1477 dir = nextpart; 1478 } while (dir != NULL); 1479 } 1480 1481 if (EMPTYSTRING(file)) { 1482 rval = -1; 1483 goto cleanup_fetch_ftp; 1484 } 1485 1486 if (dirhasglob) { 1487 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1488 file = rempath; 1489 } 1490 1491 /* Fetch the file(s). */ 1492 xargc = 2; 1493 xargv[0] = "get"; 1494 xargv[1] = file; 1495 xargv[2] = NULL; 1496 if (dirhasglob || filehasglob) { 1497 int ointeractive; 1498 1499 ointeractive = interactive; 1500 interactive = 0; 1501 xargv[0] = "mget"; 1502 mget(xargc, xargv); 1503 interactive = ointeractive; 1504 } else { 1505 if (outfile == NULL) { 1506 cp = strrchr(file, '/'); /* find savefile */ 1507 if (cp != NULL) 1508 outfile = cp + 1; 1509 else 1510 outfile = file; 1511 } 1512 xargv[2] = (char *)outfile; 1513 xargv[3] = NULL; 1514 xargc++; 1515 if (restartautofetch) 1516 reget(xargc, xargv); 1517 else 1518 get(xargc, xargv); 1519 } 1520 1521 if ((code / 100) == COMPLETE) 1522 rval = 0; 1523 1524 cleanup_fetch_ftp: 1525 FREEPTR(host); 1526 FREEPTR(path); 1527 FREEPTR(user); 1528 FREEPTR(pass); 1529 return (rval); 1530 } 1531 1532 /* 1533 * Retrieve the given file to outfile. 1534 * Supports arguments of the form: 1535 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1536 * call fetch_ftp() 1537 * "http://host/path" call fetch_url() to use HTTP 1538 * "file:///path" call fetch_url() to copy 1539 * "about:..." print a message 1540 * 1541 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1542 * is still open (e.g, ftp xfer with trailing /) 1543 */ 1544 static int 1545 go_fetch(url) 1546 const char *url; 1547 { 1548 1549 #ifndef NO_ABOUT 1550 /* 1551 * Check for about:* 1552 */ 1553 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1554 url += sizeof(ABOUT_URL) -1; 1555 if (strcasecmp(url, "ftp") == 0) { 1556 fprintf(ttyout, "%s\n%s\n", 1557 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>.", 1558 "Execute `man ftp' for more details."); 1559 } else if (strcasecmp(url, "netbsd") == 0) { 1560 fprintf(ttyout, "%s\n%s\n", 1561 "NetBSD is a freely available and redistributable UNIX-like operating system.", 1562 "For more information, see http://www.netbsd.org/index.html"); 1563 } else { 1564 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1565 } 1566 return (0); 1567 } 1568 #endif /* NO_ABOUT */ 1569 1570 /* 1571 * Check for file:// and http:// URLs. 1572 */ 1573 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1574 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1575 return (fetch_url(url, NULL, NULL, NULL)); 1576 1577 /* 1578 * Try FTP URL-style and host:file arguments next. 1579 * If ftpproxy is set with an FTP URL, use fetch_url() 1580 * Othewise, use fetch_ftp(). 1581 */ 1582 if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1583 return (fetch_url(url, NULL, NULL, NULL)); 1584 1585 return (fetch_ftp(url)); 1586 } 1587 1588 /* 1589 * Retrieve multiple files from the command line, 1590 * calling go_fetch() for each file. 1591 * 1592 * If an ftp path has a trailing "/", the path will be cd-ed into and 1593 * the connection remains open, and the function will return -1 1594 * (to indicate the connection is alive). 1595 * If an error occurs the return value will be the offset+1 in 1596 * argv[] of the file that caused a problem (i.e, argv[x] 1597 * returns x+1) 1598 * Otherwise, 0 is returned if all files retrieved successfully. 1599 */ 1600 int 1601 auto_fetch(argc, argv) 1602 int argc; 1603 char *argv[]; 1604 { 1605 volatile int argpos; 1606 int rval; 1607 1608 argpos = 0; 1609 1610 if (setjmp(toplevel)) { 1611 if (connected) 1612 disconnect(0, NULL); 1613 return (argpos + 1); 1614 } 1615 (void)signal(SIGINT, (sig_t)intr); 1616 (void)signal(SIGPIPE, (sig_t)lostpeer); 1617 1618 /* 1619 * Loop through as long as there's files to fetch. 1620 */ 1621 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1622 if (strchr(argv[argpos], ':') == NULL) 1623 break; 1624 redirect_loop = 0; 1625 anonftp = 1; /* Handle "automatic" transfers. */ 1626 rval = go_fetch(argv[argpos]); 1627 if (outfile != NULL && strcmp(outfile, "-") != 0 1628 && outfile[0] != '|') 1629 outfile = NULL; 1630 if (rval > 0) 1631 rval = argpos + 1; 1632 } 1633 1634 if (connected && rval != -1) 1635 disconnect(0, NULL); 1636 return (rval); 1637 } 1638
Indexes created Mon Sep 22 13:09:51 GMT 2025