fetch.c revision 1.72
1 /* $NetBSD: fetch.c,v 1.72 1999/09/22 03:01:53 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 1.72 1999/09/22 03:01:53 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, clen, rlen; 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 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 177 clear = (char *)xmalloc(clen); 178 strlcpy(clear, user, clen); 179 strlcat(clear, ":", clen); 180 strlcat(clear, pass, clen); 181 if (gpass == NULL) 182 memset(pass, '\0', strlen(pass)); 183 184 /* scheme + " " + enc + "\0" */ 185 rlen = strlen(scheme) + 1 + (len + 2) * 4 / 3 + 1; 186 *response = (char *)xmalloc(rlen); 187 strlcpy(*response, scheme, rlen); 188 len = strlcat(*response, " ", rlen); 189 base64_encode(clear, clen, *response + len); 190 memset(clear, '\0', clen); 191 rval = 0; 192 193 cleanup_auth_url: 194 FREEPTR(clear); 195 FREEPTR(line); 196 FREEPTR(realm); 197 return (rval); 198 } 199 200 /* 201 * Encode len bytes starting at clear using base64 encoding into encoded, 202 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 203 */ 204 void 205 base64_encode(clear, len, encoded) 206 const char *clear; 207 size_t len; 208 char *encoded; 209 { 210 static const char enc[] = 211 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 212 char *cp; 213 int i; 214 215 cp = encoded; 216 for (i = 0; i < len; i += 3) { 217 *(cp++) = enc[((clear[i + 0] >> 2))]; 218 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 219 | ((clear[i + 1] >> 4) & 0x0f)]; 220 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 221 | ((clear[i + 2] >> 6) & 0x03)]; 222 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 223 } 224 *cp = '\0'; 225 while (i-- > len) 226 *(--cp) = '='; 227 } 228 229 /* 230 * Decode %xx escapes in given string, `in-place'. 231 */ 232 static void 233 url_decode(url) 234 char *url; 235 { 236 unsigned char *p, *q; 237 238 if (EMPTYSTRING(url)) 239 return; 240 p = q = url; 241 242 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 243 while (*p) { 244 if (p[0] == '%' 245 && p[1] && isxdigit((unsigned char)p[1]) 246 && p[2] && isxdigit((unsigned char)p[2])) { 247 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 248 p+=3; 249 } else 250 *q++ = *p++; 251 } 252 *q = '\0'; 253 } 254 255 256 /* 257 * Parse URL of form: 258 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 259 * Returns -1 if a parse error occurred, otherwise 0. 260 * It's the caller's responsibility to url_decode() the returned 261 * user, pass and path. 262 * 263 * Sets type to url_t, each of the given char ** pointers to a 264 * malloc(3)ed strings of the relevant section, and port to 265 * the number given, or ftpport if ftp://, or httpport if http://. 266 * 267 * If <host> is surrounded by `[' and ']', it's parsed as an 268 * IPv6 address (as per draft-ietf-ipngwg-url-literal-01.txt). 269 * 270 * XXX: this is not totally RFC 1738 compliant; <path> will have the 271 * leading `/' unless it's an ftp:// URL, as this makes things easier 272 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 273 * host and the url-path removed, but any additional leading slashes 274 * in the url-path are retained (because they imply that we should 275 * later do "CWD" with a null argument). 276 * 277 * Examples: 278 * input url output path 279 * --------- ----------- 280 * "ftp://host" NULL 281 * "http://host/" NULL 282 * "file://host/dir/file" "dir/file" 283 * "ftp://host/" "" 284 * "ftp://host//" NULL 285 * "ftp://host//dir/file" "/dir/file" 286 */ 287 static int 288 parse_url(url, desc, type, user, pass, host, port, path) 289 const char *url; 290 const char *desc; 291 url_t *type; 292 char **user; 293 char **pass; 294 char **host; 295 char **port; 296 char **path; 297 { 298 char *cp, *ep, *thost, *tport; 299 size_t len; 300 301 if (url == NULL || desc == NULL || type == NULL || user == NULL 302 || pass == NULL || host == NULL || port == NULL || path == NULL) 303 errx(1, "parse_url: invoked with NULL argument!"); 304 305 *type = UNKNOWN_URL_T; 306 *user = *pass = *host = *port = *path = NULL; 307 tport = NULL; 308 309 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 310 url += sizeof(HTTP_URL) - 1; 311 *type = HTTP_URL_T; 312 tport = httpport; 313 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 314 url += sizeof(FTP_URL) - 1; 315 *type = FTP_URL_T; 316 tport = ftpport; 317 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 318 url += sizeof(FILE_URL) - 1; 319 *type = FILE_URL_T; 320 } else { 321 warnx("Invalid %s `%s'", desc, url); 322 cleanup_parse_url: 323 FREEPTR(*user); 324 FREEPTR(*pass); 325 FREEPTR(*host); 326 FREEPTR(*port); 327 FREEPTR(*path); 328 return (-1); 329 } 330 331 if (*url == '\0') 332 return (0); 333 334 /* find [user[:pass]@]host[:port] */ 335 ep = strchr(url, '/'); 336 if (ep == NULL) 337 thost = xstrdup(url); 338 else { 339 len = ep - url; 340 thost = (char *)xmalloc(len + 1); 341 strncpy(thost, url, len); 342 thost[len] = '\0'; 343 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 344 ep++; 345 *path = xstrdup(ep); 346 } 347 348 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 349 if (cp != NULL) { 350 if (*type == FTP_URL_T) 351 anonftp = 0; /* disable anonftp */ 352 *user = thost; 353 *cp = '\0'; 354 thost = xstrdup(cp + 1); 355 cp = strchr(*user, ':'); 356 if (cp != NULL) { 357 *cp = '\0'; 358 *pass = xstrdup(cp + 1); 359 } 360 } 361 362 #ifdef INET6 363 /* 364 * Check if thost is an encoded IPv6 address, as per 365 * draft-ietf-ipngwg-url-literal-01.txt: 366 * `[' ipv6-address ']' 367 */ 368 if (*thost == '[') { 369 cp = thost + 1; 370 if ((ep = strchr(cp, ']')) == NULL || 371 (ep[1] != '\0' && ep[1] != '\0')) { 372 warnx("Invalid address `%s' in %s `%s'", 373 thost, desc, url); 374 goto cleanup_parse_url; 375 } 376 len = ep - cp; /* change `[xxx]' -> `xxx' */ 377 memmove(thost, thost + 1, len); 378 thost[len] = '\0'; 379 if (! isipv6addr(thost)) { 380 warnx("Invalid IPv6 address `%s' in %s `%s'", 381 thost, desc, url); 382 goto cleanup_parse_url; 383 } 384 cp = ep + 1; 385 if (*cp == ':') 386 cp++; 387 else 388 cp = NULL; 389 } else 390 #endif /* INET6 */ 391 if ((cp = strchr(thost, ':')) != NULL) 392 *cp++ = '\0'; 393 *host = thost; 394 395 /* look for [:port] */ 396 if (cp != NULL) { 397 long nport; 398 399 nport = strtol(cp, &ep, 10); 400 if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 401 warnx("Invalid port `%s' in %s `%s'", cp, desc, url); 402 goto cleanup_parse_url; 403 } 404 tport = cp; 405 } 406 if (tport != NULL); 407 *port = xstrdup(tport); 408 409 if (debug) 410 fprintf(ttyout, 411 "parse_url: user `%s' pass `%s' host %s:%s path `%s'\n", 412 *user ? *user : "<null>", *pass ? *pass : "<null>", 413 *host ? *host : "<null>", *port ? *port : "<null>", 414 *path ? *path : "<null>"); 415 416 return (0); 417 } 418 419 420 jmp_buf httpabort; 421 422 /* 423 * Retrieve URL, via a proxy if necessary, using HTTP. 424 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 425 * http_proxy as appropriate. 426 * Supports HTTP redirects. 427 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 428 * is still open (e.g, ftp xfer with trailing /) 429 */ 430 static int 431 fetch_url(url, proxyenv, proxyauth, wwwauth) 432 const char *url; 433 const char *proxyenv; 434 char *proxyauth; 435 char *wwwauth; 436 { 437 #ifdef NI_NUMERICHOST 438 struct addrinfo hints, *res = NULL; 439 int error; 440 #else 441 struct sockaddr_in sin; 442 struct hostent *hp = NULL; 443 #endif 444 volatile sig_t oldintr, oldintp; 445 volatile int s; 446 int ischunked, isproxy, rval, hcode; 447 size_t len; 448 char *cp, *ep, *buf, *savefile; 449 char *auth, *location, *message; 450 char *user, *pass, *host, *port, *path, *decodedpath; 451 char *puser, *ppass; 452 off_t hashbytes; 453 int (*closefunc) __P((FILE *)); 454 FILE *fin, *fout; 455 time_t mtime; 456 url_t urltype; 457 in_port_t portnum; 458 459 closefunc = NULL; 460 fin = fout = NULL; 461 s = -1; 462 buf = savefile = NULL; 463 auth = location = message = NULL; 464 ischunked = isproxy = hcode = 0; 465 rval = 1; 466 user = pass = host = path = decodedpath = puser = ppass = NULL; 467 468 #ifdef __GNUC__ /* shut up gcc warnings */ 469 (void)&closefunc; 470 (void)&fin; 471 (void)&fout; 472 (void)&buf; 473 (void)&savefile; 474 (void)&rval; 475 (void)&isproxy; 476 (void)&hcode; 477 (void)&ischunked; 478 (void)&message; 479 (void)&location; 480 (void)&auth; 481 (void)&decodedpath; 482 #endif 483 484 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, &path) 485 == -1) 486 goto cleanup_fetch_url; 487 portnum = strtol(port, &ep, 10); 488 if (*ep || port == ep) { 489 struct servent *svp = getservbyname(port, "tcp"); 490 if (svp != NULL) 491 portnum = ntohs(svp->s_port); 492 } 493 494 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 495 && strcasecmp(host, "localhost") != 0) { 496 warnx("No support for non local file URL `%s'", url); 497 goto cleanup_fetch_url; 498 } 499 500 if (EMPTYSTRING(path)) { 501 if (urltype == FTP_URL_T) { 502 rval = fetch_ftp(url); 503 goto cleanup_fetch_url; 504 } 505 if (urltype != HTTP_URL_T || outfile == NULL) { 506 warnx("Invalid URL (no file after host) `%s'", url); 507 goto cleanup_fetch_url; 508 } 509 } 510 511 decodedpath = xstrdup(path); 512 url_decode(decodedpath); 513 514 if (outfile) 515 savefile = xstrdup(outfile); 516 else { 517 cp = strrchr(decodedpath, '/'); /* find savefile */ 518 if (cp != NULL) 519 savefile = xstrdup(cp + 1); 520 else 521 savefile = xstrdup(decodedpath); 522 } 523 if (EMPTYSTRING(savefile)) { 524 if (urltype == FTP_URL_T) { 525 rval = fetch_ftp(url); 526 goto cleanup_fetch_url; 527 } 528 warnx("Invalid URL (no file after directory) `%s'", url); 529 goto cleanup_fetch_url; 530 } else { 531 if (debug) 532 fprintf(ttyout, "got savefile as `%s'\n", savefile); 533 } 534 535 filesize = -1; 536 mtime = -1; 537 if (urltype == FILE_URL_T) { /* file:// URLs */ 538 struct stat sb; 539 540 direction = "copied"; 541 fin = fopen(decodedpath, "r"); 542 if (fin == NULL) { 543 warn("Cannot open file `%s'", decodedpath); 544 goto cleanup_fetch_url; 545 } 546 if (fstat(fileno(fin), &sb) == 0) { 547 mtime = sb.st_mtime; 548 filesize = sb.st_size; 549 } 550 if (verbose) 551 fprintf(ttyout, "Copying %s\n", decodedpath); 552 } else { /* ftp:// or http:// URLs */ 553 char *leading; 554 int hasleading; 555 556 if (proxyenv == NULL) { 557 if (urltype == HTTP_URL_T) 558 proxyenv = httpproxy; 559 else if (urltype == FTP_URL_T) 560 proxyenv = ftpproxy; 561 } 562 direction = "retrieved"; 563 if (proxyenv != NULL) { /* use proxy */ 564 url_t purltype; 565 char *phost, *ppath; 566 char *pport; 567 568 isproxy = 1; 569 570 /* check URL against list of no_proxied sites */ 571 if (no_proxy != NULL) { 572 char *np, *np_copy; 573 long np_port; 574 size_t hlen, plen; 575 576 np_copy = xstrdup(no_proxy); 577 hlen = strlen(host); 578 while ((cp = strsep(&np_copy, " ,")) != NULL) { 579 if (*cp == '\0') 580 continue; 581 if ((np = strrchr(cp, ':')) != NULL) { 582 *np = '\0'; 583 np_port = 584 strtol(np + 1, &ep, 10); 585 if (*ep != '\0') 586 continue; 587 if (portnum != 588 htons((in_port_t)np_port)) 589 continue; 590 } 591 plen = strlen(cp); 592 if (strncasecmp(host + hlen - plen, 593 cp, plen) == 0) { 594 isproxy = 0; 595 break; 596 } 597 } 598 FREEPTR(np_copy); 599 } 600 601 if (isproxy) { 602 if (parse_url(proxyenv, "proxy URL", &purltype, 603 &puser, &ppass, &phost, &pport, &ppath) 604 == -1) 605 goto cleanup_fetch_url; 606 607 if ((purltype != HTTP_URL_T 608 && purltype != FTP_URL_T) || 609 EMPTYSTRING(phost) || 610 (! EMPTYSTRING(ppath) 611 && strcmp(ppath, "/") != 0)) { 612 warnx("Malformed proxy URL `%s'", 613 proxyenv); 614 FREEPTR(phost); 615 FREEPTR(pport); 616 FREEPTR(ppath); 617 goto cleanup_fetch_url; 618 } 619 620 FREEPTR(host); 621 host = phost; 622 FREEPTR(port); 623 port = pport; 624 FREEPTR(path); 625 path = xstrdup(url); 626 FREEPTR(ppath); 627 } 628 } /* proxyenv != NULL */ 629 630 #ifndef NI_NUMERICHOST 631 memset(&sin, 0, sizeof(sin)); 632 sin.sin_family = AF_INET; 633 634 if (isdigit((unsigned char)host[0])) { 635 if (inet_aton(host, &sin.sin_addr) == 0) { 636 warnx("Invalid IP address `%s'", host); 637 goto cleanup_fetch_url; 638 } 639 } else { 640 hp = gethostbyname(host); 641 if (hp == NULL) { 642 warnx("%s: %s", host, hstrerror(h_errno)); 643 goto cleanup_fetch_url; 644 } 645 if (hp->h_addrtype != AF_INET) { 646 warnx("`%s': not an Internet address?", host); 647 goto cleanup_fetch_url; 648 } 649 if (hp->h_length > sizeof(sin.sin_addr)) 650 hp->h_length = sizeof(sin.sin_addr); 651 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 652 } 653 654 if (port == NULL) { 655 warnx("Unknown port for URL `%s'", url); 656 goto cleanup_fetch_url; 657 } 658 portnum = strtol(port, &ep, 10); 659 if (*ep || port == ep) { 660 struct servent *svp = getservbyname(port, "tcp"); 661 if (svp != NULL) 662 portnum = ntohs(svp->s_port); 663 } 664 sin.sin_port = portnum; 665 666 s = socket(AF_INET, SOCK_STREAM, 0); 667 if (s == -1) { 668 warn("Can't create socket"); 669 goto cleanup_fetch_url; 670 } 671 672 while (xconnect(s, (struct sockaddr *)&sin, 673 sizeof(sin)) == -1) { 674 if (errno == EINTR) 675 continue; 676 if (hp && hp->h_addr_list[1]) { 677 int oerrno = errno; 678 char *ia; 679 680 ia = inet_ntoa(sin.sin_addr); 681 errno = oerrno; 682 warn("Connect to address `%s'", ia); 683 hp->h_addr_list++; 684 memcpy(&sin.sin_addr, hp->h_addr_list[0], 685 (size_t)hp->h_length); 686 if (verbose) 687 fprintf(ttyout, "Trying %s...\n", 688 inet_ntoa(sin.sin_addr)); 689 (void)close(s); 690 s = socket(AF_INET, SOCK_STREAM, 0); 691 if (s < 0) { 692 warn("Can't create socket"); 693 goto cleanup_fetch_url; 694 } 695 continue; 696 } 697 warn("Can't connect to `%s'", host); 698 goto cleanup_fetch_url; 699 } 700 #else 701 memset(&hints, 0, sizeof(hints)); 702 hints.ai_flags = 0; 703 hints.ai_family = AF_UNSPEC; 704 hints.ai_socktype = SOCK_STREAM; 705 hints.ai_protocol = 0; 706 error = getaddrinfo(host, port, &hints, &res); 707 if (error) { 708 warnx(gai_strerror(error)); 709 goto cleanup_fetch_url; 710 } 711 712 while (1) { 713 s = socket(res->ai_family, 714 res->ai_socktype, res->ai_protocol); 715 if (s < 0) { 716 warn("Can't create socket"); 717 goto cleanup_fetch_url; 718 } 719 720 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 721 char hbuf[MAXHOSTNAMELEN]; 722 getnameinfo(res->ai_addr, res->ai_addrlen, 723 hbuf, sizeof(hbuf), NULL, 0, 724 NI_NUMERICHOST); 725 warn("Connect to address `%s'", hbuf); 726 close(s); 727 res = res->ai_next; 728 if (res) { 729 getnameinfo(res->ai_addr, 730 res->ai_addrlen, hbuf, sizeof(hbuf), 731 NULL, 0, NI_NUMERICHOST); 732 if (verbose) 733 fprintf(ttyout, 734 "Trying %s...\n", hbuf); 735 continue; 736 } 737 warn("Can't connect to %s", host); 738 goto cleanup_fetch_url; 739 } 740 741 break; 742 } 743 #endif 744 745 746 fin = fdopen(s, "r+"); 747 /* 748 * Construct and send the request. 749 */ 750 if (verbose) 751 fprintf(ttyout, "Requesting %s\n", url); 752 leading = " ("; 753 hasleading = 0; 754 if (isproxy) { 755 if (verbose) { 756 fprintf(ttyout, "%svia %s:%s", leading, 757 host, port); 758 leading = ", "; 759 hasleading++; 760 } 761 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 762 if (flushcache) 763 fprintf(fin, "Pragma: no-cache\r\n"); 764 } else { 765 struct utsname unam; 766 767 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 768 fprintf(fin, "Host: %s:%s\r\n", host, port); 769 fprintf(fin, "Accept: */*\r\n"); 770 if (uname(&unam) != -1) { 771 fprintf(fin, "User-Agent: %s-%s/ftp\r\n", 772 unam.sysname, unam.release); 773 } 774 fprintf(fin, "Connection: close\r\n"); 775 if (flushcache) 776 fprintf(fin, "Cache-Control: no-cache\r\n"); 777 } 778 if (wwwauth) { 779 if (verbose) { 780 fprintf(ttyout, "%swith authorization", 781 leading); 782 leading = ", "; 783 hasleading++; 784 } 785 fprintf(fin, "Authorization: %s\r\n", wwwauth); 786 } 787 if (proxyauth) { 788 if (verbose) { 789 fprintf(ttyout, 790 "%swith proxy authorization", leading); 791 leading = ", "; 792 hasleading++; 793 } 794 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 795 } 796 if (verbose && hasleading) 797 fputs(")\n", ttyout); 798 fprintf(fin, "\r\n"); 799 if (fflush(fin) == EOF) { 800 warn("Writing HTTP request"); 801 goto cleanup_fetch_url; 802 } 803 804 /* Read the response */ 805 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 806 warn("Receiving HTTP reply"); 807 goto cleanup_fetch_url; 808 } 809 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 810 buf[--len] = '\0'; 811 if (debug) 812 fprintf(ttyout, "received `%s'\n", buf); 813 814 /* Determine HTTP response code */ 815 cp = strchr(buf, ' '); 816 if (cp == NULL) 817 goto improper; 818 else 819 cp++; 820 hcode = strtol(cp, &ep, 10); 821 if (*ep != '\0' && !isspace((unsigned char)*ep)) 822 goto improper; 823 message = xstrdup(cp); 824 825 /* Read the rest of the header. */ 826 FREEPTR(buf); 827 while (1) { 828 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 829 == NULL) { 830 warn("Receiving HTTP reply"); 831 goto cleanup_fetch_url; 832 } 833 while (len > 0 && 834 (buf[len-1] == '\r' || buf[len-1] == '\n')) 835 buf[--len] = '\0'; 836 if (len == 0) 837 break; 838 if (debug) 839 fprintf(ttyout, "received `%s'\n", buf); 840 841 /* Look for some headers */ 842 cp = buf; 843 844 #define CONTENTLEN "Content-Length: " 845 if (strncasecmp(cp, CONTENTLEN, 846 sizeof(CONTENTLEN) - 1) == 0) { 847 cp += sizeof(CONTENTLEN) - 1; 848 filesize = strtol(cp, &ep, 10); 849 if (filesize < 1 || *ep != '\0') 850 goto improper; 851 if (debug) 852 fprintf(ttyout, 853 #ifndef NO_QUAD 854 "parsed length as: %qd\n", 855 (long long)filesize); 856 #else 857 "parsed length as: %ld\n", 858 (long)filesize); 859 #endif 860 861 #define LASTMOD "Last-Modified: " 862 } else if (strncasecmp(cp, LASTMOD, 863 sizeof(LASTMOD) - 1) == 0) { 864 struct tm parsed; 865 char *t; 866 867 cp += sizeof(LASTMOD) - 1; 868 /* RFC 1123 */ 869 if ((t = strptime(cp, 870 "%a, %d %b %Y %H:%M:%S GMT", 871 &parsed)) 872 /* RFC 850 */ 873 || (t = strptime(cp, 874 "%a, %d-%b-%y %H:%M:%S GMT", 875 &parsed)) 876 /* asctime */ 877 || (t = strptime(cp, 878 "%a, %b %d %H:%M:%S %Y", 879 &parsed))) { 880 parsed.tm_isdst = -1; 881 if (*t == '\0') 882 mtime = mkgmtime(&parsed); 883 if (debug && mtime != -1) { 884 fprintf(ttyout, 885 "parsed date as: %s", 886 ctime(&mtime)); 887 } 888 } 889 890 #define LOCATION "Location: " 891 } else if (strncasecmp(cp, LOCATION, 892 sizeof(LOCATION) - 1) == 0) { 893 cp += sizeof(LOCATION) - 1; 894 location = xstrdup(cp); 895 if (debug) 896 fprintf(ttyout, 897 "parsed location as: %s\n", cp); 898 899 #define TRANSENC "Transfer-Encoding: " 900 } else if (strncasecmp(cp, TRANSENC, 901 sizeof(TRANSENC) - 1) == 0) { 902 cp += sizeof(TRANSENC) - 1; 903 if (strcasecmp(cp, "chunked") != 0) { 904 warnx( 905 "Unsupported transfer encoding - `%s'", 906 cp); 907 goto cleanup_fetch_url; 908 } 909 ischunked++; 910 if (debug) 911 fprintf(ttyout, 912 "using chunked encoding\n"); 913 914 #define PROXYAUTH "Proxy-Authenticate: " 915 } else if (strncasecmp(cp, PROXYAUTH, 916 sizeof(PROXYAUTH) - 1) == 0) { 917 cp += sizeof(PROXYAUTH) - 1; 918 FREEPTR(auth); 919 auth = xstrdup(cp); 920 if (debug) 921 fprintf(ttyout, 922 "parsed proxy-auth as: %s\n", cp); 923 924 #define WWWAUTH "WWW-Authenticate: " 925 } else if (strncasecmp(cp, WWWAUTH, 926 sizeof(WWWAUTH) - 1) == 0) { 927 cp += sizeof(WWWAUTH) - 1; 928 FREEPTR(auth); 929 auth = xstrdup(cp); 930 if (debug) 931 fprintf(ttyout, 932 "parsed www-auth as: %s\n", cp); 933 934 } 935 936 } 937 /* finished parsing header */ 938 FREEPTR(buf); 939 940 switch (hcode) { 941 case 200: 942 break; 943 case 300: 944 case 301: 945 case 302: 946 case 303: 947 case 305: 948 if (EMPTYSTRING(location)) { 949 warnx( 950 "No redirection Location provided by server"); 951 goto cleanup_fetch_url; 952 } 953 if (redirect_loop++ > 5) { 954 warnx("Too many redirections requested"); 955 goto cleanup_fetch_url; 956 } 957 if (hcode == 305) { 958 if (verbose) 959 fprintf(ttyout, "Redirected via %s\n", 960 location); 961 rval = fetch_url(url, location, 962 proxyauth, wwwauth); 963 } else { 964 if (verbose) 965 fprintf(ttyout, "Redirected to %s\n", 966 location); 967 rval = go_fetch(location); 968 } 969 goto cleanup_fetch_url; 970 case 401: 971 case 407: 972 { 973 char **authp; 974 char *auser, *apass; 975 976 fprintf(ttyout, "%s\n", message); 977 if (EMPTYSTRING(auth)) { 978 warnx( 979 "No authentication challenge provided by server"); 980 goto cleanup_fetch_url; 981 } 982 if (hcode == 401) { 983 authp = &wwwauth; 984 auser = user; 985 apass = pass; 986 } else { 987 authp = &proxyauth; 988 auser = puser; 989 apass = ppass; 990 } 991 if (*authp != NULL) { 992 char reply[10]; 993 994 fprintf(ttyout, 995 "Authorization failed. Retry (y/n)? "); 996 if (fgets(reply, sizeof(reply), stdin) != NULL 997 && tolower(reply[0]) != 'y') 998 goto cleanup_fetch_url; 999 auser = NULL; 1000 apass = NULL; 1001 } 1002 if (auth_url(auth, authp, auser, apass) == 0) { 1003 rval = fetch_url(url, proxyenv, 1004 proxyauth, wwwauth); 1005 memset(*authp, '\0', strlen(*authp)); 1006 FREEPTR(*authp); 1007 } 1008 goto cleanup_fetch_url; 1009 } 1010 default: 1011 if (message) 1012 warnx("Error retrieving file - `%s'", message); 1013 else 1014 warnx("Unknown error retrieving file"); 1015 goto cleanup_fetch_url; 1016 } 1017 } /* end of ftp:// or http:// specific setup */ 1018 1019 oldintr = oldintp = NULL; 1020 1021 /* Open the output file. */ 1022 if (strcmp(savefile, "-") == 0) { 1023 fout = stdout; 1024 } else if (*savefile == '|') { 1025 oldintp = signal(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 (setjmp(httpabort)) { 1043 if (oldintr) 1044 (void)signal(SIGINT, oldintr); 1045 if (oldintp) 1046 (void)signal(SIGPIPE, oldintp); 1047 goto cleanup_fetch_url; 1048 } 1049 oldintr = signal(SIGINT, aborthttp); 1050 1051 bytes = 0; 1052 hashbytes = mark; 1053 progressmeter(-1); 1054 1055 /* Finally, suck down the file. */ 1056 buf = xmalloc(BUFSIZ + 1); 1057 do { 1058 ssize_t chunksize; 1059 1060 chunksize = 0; 1061 /* read chunksize */ 1062 if (ischunked) { 1063 if (fgets(buf, BUFSIZ, fin) == NULL) { 1064 warnx("Unexpected EOF reading chunksize"); 1065 goto cleanup_fetch_url; 1066 } 1067 chunksize = strtol(buf, &ep, 16); 1068 if (strcmp(ep, "\r\n") != 0) { 1069 warnx("Unexpected data following chunksize"); 1070 goto cleanup_fetch_url; 1071 } 1072 if (debug) 1073 fprintf(ttyout, 1074 #ifndef NO_QUAD 1075 "got chunksize of %qd\n", 1076 (long long)chunksize); 1077 #else 1078 "got chunksize of %ld\n", 1079 (long)chunksize); 1080 #endif 1081 if (chunksize == 0) 1082 break; 1083 } 1084 /* transfer file or chunk */ 1085 while (1) { 1086 struct timeval then, now, td; 1087 off_t bufrem; 1088 1089 if (rate_get) 1090 (void)gettimeofday(&then, NULL); 1091 bufrem = rate_get ? rate_get : BUFSIZ; 1092 while (bufrem > 0) { 1093 len = fread(buf, sizeof(char), 1094 ischunked ? MIN(chunksize, bufrem) : BUFSIZ, 1095 fin); 1096 if (len <= 0) 1097 goto chunkdone; 1098 bytes += len; 1099 bufrem -= len; 1100 if (fwrite(buf, sizeof(char), len, fout) 1101 != len) { 1102 warn("Writing `%s'", savefile); 1103 goto cleanup_fetch_url; 1104 } 1105 } 1106 if (hash && !progress) { 1107 while (bytes >= hashbytes) { 1108 (void)putc('#', ttyout); 1109 hashbytes += mark; 1110 } 1111 (void)fflush(ttyout); 1112 } 1113 if (ischunked) { 1114 chunksize -= len; 1115 if (chunksize <= 0) 1116 goto chunkdone; 1117 } 1118 if (rate_get) { 1119 while (1) { 1120 (void)gettimeofday(&now, NULL); 1121 timersub(&now, &then, &td); 1122 if (td.tv_sec > 0) 1123 break; 1124 usleep(1000000 - td.tv_usec); 1125 } 1126 } 1127 } 1128 /* read CRLF after chunk*/ 1129 chunkdone: 1130 if (ischunked) { 1131 if (fgets(buf, BUFSIZ, fin) == NULL) 1132 break; 1133 if (strcmp(buf, "\r\n") != 0) { 1134 warnx("Unexpected data following chunk"); 1135 goto cleanup_fetch_url; 1136 } 1137 } 1138 } while (ischunked); 1139 if (hash && !progress && bytes > 0) { 1140 if (bytes < mark) 1141 (void)putc('#', ttyout); 1142 (void)putc('\n', ttyout); 1143 } 1144 if (ferror(fin)) { 1145 warn("Reading file"); 1146 goto cleanup_fetch_url; 1147 } 1148 progressmeter(1); 1149 (void)fflush(fout); 1150 (void)signal(SIGINT, oldintr); 1151 if (oldintp) 1152 (void)signal(SIGPIPE, oldintp); 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 resetsockbufsize(); 1179 if (fin != NULL) 1180 fclose(fin); 1181 else if (s != -1) 1182 close(s); 1183 if (closefunc != NULL && fout != NULL) 1184 (*closefunc)(fout); 1185 #ifdef NI_NUMERICHOST 1186 if (res != NULL) 1187 freeaddrinfo(res); 1188 #endif 1189 FREEPTR(savefile); 1190 FREEPTR(user); 1191 FREEPTR(pass); 1192 FREEPTR(host); 1193 FREEPTR(port); 1194 FREEPTR(path); 1195 FREEPTR(decodedpath); 1196 FREEPTR(puser); 1197 FREEPTR(ppass); 1198 FREEPTR(buf); 1199 FREEPTR(auth); 1200 FREEPTR(location); 1201 FREEPTR(message); 1202 return (rval); 1203 } 1204 1205 /* 1206 * Abort a HTTP retrieval 1207 */ 1208 void 1209 aborthttp(notused) 1210 int notused; 1211 { 1212 1213 alarmtimer(0); 1214 fputs("\nHTTP fetch aborted.\n", ttyout); 1215 longjmp(httpabort, 1); 1216 } 1217 1218 /* 1219 * Retrieve ftp URL or classic ftp argument using FTP. 1220 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1221 * is still open (e.g, ftp xfer with trailing /) 1222 */ 1223 static int 1224 fetch_ftp(url) 1225 const char *url; 1226 { 1227 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1228 char *host, *path, *dir, *file, *user, *pass; 1229 char *port; 1230 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1231 url_t urltype; 1232 1233 host = path = dir = file = user = pass = NULL; 1234 port = NULL; 1235 rval = 1; 1236 type = TYPE_I; 1237 1238 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1239 if ((parse_url(url, "URL", &urltype, &user, &pass, 1240 &host, &port, &path) == -1) || 1241 (user != NULL && *user == '\0') || 1242 (pass != NULL && *pass == '\0') || 1243 EMPTYSTRING(host)) { 1244 warnx("Invalid URL `%s'", url); 1245 goto cleanup_fetch_ftp; 1246 } 1247 url_decode(user); 1248 url_decode(pass); 1249 /* 1250 * Note: Don't url_decode(path) here. We need to keep the 1251 * distinction between "/" and "%2F" until later. 1252 */ 1253 1254 /* check for trailing ';type=[aid]' */ 1255 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1256 if (strcasecmp(cp, ";type=a") == 0) 1257 type = TYPE_A; 1258 else if (strcasecmp(cp, ";type=i") == 0) 1259 type = TYPE_I; 1260 else if (strcasecmp(cp, ";type=d") == 0) { 1261 warnx( 1262 "Directory listing via a URL is not supported"); 1263 goto cleanup_fetch_ftp; 1264 } else { 1265 warnx("Invalid suffix `%s' in URL `%s'", cp, 1266 url); 1267 goto cleanup_fetch_ftp; 1268 } 1269 *cp = 0; 1270 } 1271 } else { /* classic style `host:file' */ 1272 urltype = CLASSIC_URL_T; 1273 host = xstrdup(url); 1274 cp = strchr(host, ':'); 1275 if (cp != NULL) { 1276 *cp = '\0'; 1277 path = xstrdup(cp + 1); 1278 } 1279 } 1280 if (EMPTYSTRING(host)) 1281 goto cleanup_fetch_ftp; 1282 1283 /* Extract the file and (if present) directory name. */ 1284 dir = path; 1285 if (! EMPTYSTRING(dir)) { 1286 /* 1287 * If we are dealing with classic `host:path' syntax, 1288 * then a path of the form `/file' (resulting from 1289 * input of the form `host:/file') means that we should 1290 * do "CWD /" before retrieving the file. So we set 1291 * dir="/" and file="file". 1292 * 1293 * But if we are dealing with URLs like 1294 * `ftp://host/path' then a path of the form `/file' 1295 * (resulting from a URL of the form `ftp://host//file') 1296 * means that we should do `CWD ' (with an empty 1297 * argument) before retrieving the file. So we set 1298 * dir="" and file="file". 1299 * 1300 * If the path does not contain / at all, we set 1301 * dir=NULL. (We get a path without any slashes if 1302 * we are dealing with classic `host:file' or URL 1303 * `ftp://host/file'.) 1304 * 1305 * In all other cases, we set dir to a string that does 1306 * not include the final '/' that separates the dir part 1307 * from the file part of the path. (This will be the 1308 * empty string if and only if we are dealing with a 1309 * path of the form `/file' resulting from an URL of the 1310 * form `ftp://host//file'.) 1311 */ 1312 cp = strrchr(dir, '/'); 1313 if (cp == dir && urltype == CLASSIC_URL_T) { 1314 file = cp + 1; 1315 dir = "/"; 1316 } else if (cp != NULL) { 1317 *cp++ = '\0'; 1318 file = cp; 1319 } else { 1320 file = dir; 1321 dir = NULL; 1322 } 1323 } else 1324 dir = NULL; 1325 if (urltype == FTP_URL_T && file != NULL) { 1326 url_decode(file); 1327 /* but still don't url_decode(dir) */ 1328 } 1329 if (debug) 1330 fprintf(ttyout, 1331 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1332 user ? user : "<null>", pass ? pass : "<null>", 1333 host ? host : "<null>", port ? port : "<null>", 1334 path ? path : "<null>", 1335 dir ? dir : "<null>", file ? file : "<null>"); 1336 1337 dirhasglob = filehasglob = 0; 1338 if (doglob && urltype == CLASSIC_URL_T) { 1339 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1340 dirhasglob = 1; 1341 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1342 filehasglob = 1; 1343 } 1344 1345 /* Set up the connection */ 1346 if (connected) 1347 disconnect(0, NULL); 1348 xargv[0] = __progname; 1349 xargv[1] = host; 1350 xargv[2] = NULL; 1351 xargc = 2; 1352 if (port) { 1353 xargv[2] = port; 1354 xargv[3] = NULL; 1355 xargc = 3; 1356 } 1357 oautologin = autologin; 1358 if (user != NULL) 1359 autologin = 0; 1360 setpeer(xargc, xargv); 1361 autologin = oautologin; 1362 if ((connected == 0) || ((connected == 1) 1363 && !ftp_login(host, user, pass))) { 1364 warnx("Can't connect or login to host `%s'", host); 1365 goto cleanup_fetch_ftp; 1366 } 1367 1368 switch (type) { 1369 case TYPE_A: 1370 setascii(0, NULL); 1371 break; 1372 case TYPE_I: 1373 setbinary(0, NULL); 1374 break; 1375 default: 1376 errx(1, "fetch_ftp: unknown transfer type %d\n", type); 1377 } 1378 1379 /* 1380 * Change directories, if necessary. 1381 * 1382 * Note: don't use EMPTYSTRING(dir) below, because 1383 * dir=="" means something different from dir==NULL. 1384 */ 1385 if (dir != NULL && !dirhasglob) { 1386 char *nextpart; 1387 1388 /* 1389 * If we are dealing with a classic `host:path' (urltype 1390 * is CLASSIC_URL_T) then we have a raw directory 1391 * name (not encoded in any way) and we can change 1392 * directories in one step. 1393 * 1394 * If we are dealing with an `ftp://host/path' URL 1395 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1396 * send a separate CWD command for each unescaped "/" 1397 * in the path, and we have to interpret %hex escaping 1398 * *after* we find the slashes. It's possible to get 1399 * empty components here, (from multiple adjacent 1400 * slashes in the path) and RFC 1738 says that we should 1401 * still do `CWD ' (with a null argument) in such cases. 1402 * 1403 * Many ftp servers don't support `CWD ', so if there's an 1404 * error performing that command, bail out with a descriptive 1405 * message. 1406 * 1407 * Examples: 1408 * 1409 * host: dir="", urltype=CLASSIC_URL_T 1410 * logged in (to default directory) 1411 * host:file dir=NULL, urltype=CLASSIC_URL_T 1412 * "RETR file" 1413 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1414 * "CWD dir", logged in 1415 * ftp://host/ dir="", urltype=FTP_URL_T 1416 * logged in (to default directory) 1417 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1418 * "CWD dir", logged in 1419 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1420 * "RETR file" 1421 * ftp://host//file dir="", urltype=FTP_URL_T 1422 * "CWD ", "RETR file" 1423 * host:/file dir="/", urltype=CLASSIC_URL_T 1424 * "CWD /", "RETR file" 1425 * ftp://host///file dir="/", urltype=FTP_URL_T 1426 * "CWD ", "CWD ", "RETR file" 1427 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1428 * "CWD /", "RETR file" 1429 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1430 * "CWD foo", "RETR file" 1431 * ftp://host/foo/bar/file dir="foo/bar" 1432 * "CWD foo", "CWD bar", "RETR file" 1433 * ftp://host//foo/bar/file dir="/foo/bar" 1434 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1435 * ftp://host/foo//bar/file dir="foo//bar" 1436 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1437 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1438 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1439 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1440 * "CWD /foo", "CWD bar", "RETR file" 1441 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1442 * "CWD /foo/bar", "RETR file" 1443 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1444 * "RETR /foo/bar/file" 1445 * 1446 * Note that we don't need `dir' after this point. 1447 */ 1448 do { 1449 if (urltype == FTP_URL_T) { 1450 nextpart = strchr(dir, '/'); 1451 if (nextpart) { 1452 *nextpart = '\0'; 1453 nextpart++; 1454 } 1455 url_decode(dir); 1456 } else 1457 nextpart = NULL; 1458 if (debug) 1459 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1460 dir ? dir : "<null>", 1461 nextpart ? nextpart : "<null>"); 1462 if (urltype == FTP_URL_T || *dir != '\0') { 1463 xargv[0] = "cd"; 1464 xargv[1] = dir; 1465 xargv[2] = NULL; 1466 dirchange = 0; 1467 cd(2, xargv); 1468 if (! dirchange) { 1469 if (*dir == '\0' && code == 500) 1470 fprintf(stderr, 1471 "\n" 1472 "ftp: The `CWD ' command (without a directory), which is required by\n" 1473 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1474 " conflicts with the server's conformance to RFC 959.\n" 1475 " Try the same URL without the `//' in the URL pathname.\n" 1476 "\n"); 1477 goto cleanup_fetch_ftp; 1478 } 1479 } 1480 dir = nextpart; 1481 } while (dir != NULL); 1482 } 1483 1484 if (EMPTYSTRING(file)) { 1485 rval = -1; 1486 goto cleanup_fetch_ftp; 1487 } 1488 1489 if (dirhasglob) { 1490 strlcpy(rempath, dir, sizeof(rempath)); 1491 strlcat(rempath, "/", sizeof(rempath)); 1492 strlcat(rempath, file, sizeof(rempath)); 1493 file = rempath; 1494 } 1495 1496 /* Fetch the file(s). */ 1497 xargc = 2; 1498 xargv[0] = "get"; 1499 xargv[1] = file; 1500 xargv[2] = NULL; 1501 if (dirhasglob || filehasglob) { 1502 int ointeractive; 1503 1504 ointeractive = interactive; 1505 interactive = 0; 1506 xargv[0] = "mget"; 1507 mget(xargc, xargv); 1508 interactive = ointeractive; 1509 } else { 1510 if (outfile == NULL) { 1511 cp = strrchr(file, '/'); /* find savefile */ 1512 if (cp != NULL) 1513 outfile = cp + 1; 1514 else 1515 outfile = file; 1516 } 1517 xargv[2] = (char *)outfile; 1518 xargv[3] = NULL; 1519 xargc++; 1520 if (restartautofetch) 1521 reget(xargc, xargv); 1522 else 1523 get(xargc, xargv); 1524 } 1525 1526 if ((code / 100) == COMPLETE) 1527 rval = 0; 1528 1529 cleanup_fetch_ftp: 1530 FREEPTR(host); 1531 FREEPTR(path); 1532 FREEPTR(user); 1533 FREEPTR(pass); 1534 return (rval); 1535 } 1536 1537 /* 1538 * Retrieve the given file to outfile. 1539 * Supports arguments of the form: 1540 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1541 * call fetch_ftp() 1542 * "http://host/path" call fetch_url() to use HTTP 1543 * "file:///path" call fetch_url() to copy 1544 * "about:..." print a message 1545 * 1546 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1547 * is still open (e.g, ftp xfer with trailing /) 1548 */ 1549 static int 1550 go_fetch(url) 1551 const char *url; 1552 { 1553 1554 #ifndef NO_ABOUT 1555 /* 1556 * Check for about:* 1557 */ 1558 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1559 url += sizeof(ABOUT_URL) -1; 1560 if (strcasecmp(url, "ftp") == 0) { 1561 fprintf(ttyout, "%s\n%s\n", 1562 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>.", 1563 "Execute `man ftp' for more details."); 1564 } else if (strcasecmp(url, "netbsd") == 0) { 1565 fprintf(ttyout, "%s\n%s\n", 1566 "NetBSD is a freely available and redistributable UNIX-like operating system.", 1567 "For more information, see http://www.netbsd.org/index.html"); 1568 } else { 1569 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1570 } 1571 return (0); 1572 } 1573 #endif /* NO_ABOUT */ 1574 1575 /* 1576 * Check for file:// and http:// URLs. 1577 */ 1578 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1579 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1580 return (fetch_url(url, NULL, NULL, NULL)); 1581 1582 /* 1583 * Try FTP URL-style and host:file arguments next. 1584 * If ftpproxy is set with an FTP URL, use fetch_url() 1585 * Othewise, use fetch_ftp(). 1586 */ 1587 if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1588 return (fetch_url(url, NULL, NULL, NULL)); 1589 1590 return (fetch_ftp(url)); 1591 } 1592 1593 /* 1594 * Retrieve multiple files from the command line, 1595 * calling go_fetch() for each file. 1596 * 1597 * If an ftp path has a trailing "/", the path will be cd-ed into and 1598 * the connection remains open, and the function will return -1 1599 * (to indicate the connection is alive). 1600 * If an error occurs the return value will be the offset+1 in 1601 * argv[] of the file that caused a problem (i.e, argv[x] 1602 * returns x+1) 1603 * Otherwise, 0 is returned if all files retrieved successfully. 1604 */ 1605 int 1606 auto_fetch(argc, argv) 1607 int argc; 1608 char *argv[]; 1609 { 1610 volatile int argpos; 1611 int rval; 1612 1613 argpos = 0; 1614 1615 if (setjmp(toplevel)) { 1616 if (connected) 1617 disconnect(0, NULL); 1618 return (argpos + 1); 1619 } 1620 (void)signal(SIGINT, (sig_t)intr); 1621 (void)signal(SIGPIPE, (sig_t)lostpeer); 1622 1623 /* 1624 * Loop through as long as there's files to fetch. 1625 */ 1626 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1627 if (strchr(argv[argpos], ':') == NULL) 1628 break; 1629 redirect_loop = 0; 1630 anonftp = 1; /* Handle "automatic" transfers. */ 1631 rval = go_fetch(argv[argpos]); 1632 if (outfile != NULL && strcmp(outfile, "-") != 0 1633 && outfile[0] != '|') 1634 outfile = NULL; 1635 if (rval > 0) 1636 rval = argpos + 1; 1637 } 1638 1639 if (connected && rval != -1) 1640 disconnect(0, NULL); 1641 return (rval); 1642 } 1643
Indexes created Tue Sep 23 22:09:46 GMT 2025