fetch.c revision 1.82
1 /* $NetBSD: fetch.c,v 1.82 1999/09/30 23:51:27 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 1.82 1999/09/30 23:51:27 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 **, in_port_t *, 91 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 (void)strlcpy(realm, cp, len + 1); 154 } else { 155 warnx("Unsupported WWW Authentication challenge - `%s'", 156 challenge); 157 goto cleanup_auth_url; 158 } 159 160 if (guser != NULL) 161 (void)strlcpy(user, guser, sizeof(user)); 162 else { 163 fprintf(ttyout, "Username for `%s': ", realm); 164 (void)fflush(ttyout); 165 if (fgets(user, sizeof(user) - 1, stdin) == NULL) 166 goto cleanup_auth_url; 167 user[strlen(user) - 1] = '\0'; 168 } 169 if (gpass != NULL) 170 pass = (char *)gpass; 171 else 172 pass = getpass("Password: "); 173 174 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */ 175 clear = (char *)xmalloc(clen); 176 (void)strlcpy(clear, user, clen); 177 (void)strlcat(clear, ":", clen); 178 (void)strlcat(clear, pass, clen); 179 if (gpass == NULL) 180 memset(pass, 0, strlen(pass)); 181 182 /* scheme + " " + enc + "\0" */ 183 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 184 *response = (char *)xmalloc(rlen); 185 (void)strlcpy(*response, scheme, rlen); 186 len = strlcat(*response, " ", rlen); 187 base64_encode(clear, clen, *response + len); 188 memset(clear, 0, clen); 189 rval = 0; 190 191 cleanup_auth_url: 192 FREEPTR(clear); 193 FREEPTR(line); 194 FREEPTR(realm); 195 return (rval); 196 } 197 198 /* 199 * Encode len bytes starting at clear using base64 encoding into encoded, 200 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 201 */ 202 void 203 base64_encode(clear, len, encoded) 204 const char *clear; 205 size_t len; 206 char *encoded; 207 { 208 static const char enc[] = 209 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 210 char *cp; 211 int i; 212 213 cp = encoded; 214 for (i = 0; i < len; i += 3) { 215 *(cp++) = enc[((clear[i + 0] >> 2))]; 216 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 217 | ((clear[i + 1] >> 4) & 0x0f)]; 218 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 219 | ((clear[i + 2] >> 6) & 0x03)]; 220 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 221 } 222 *cp = '\0'; 223 while (i-- > len) 224 *(--cp) = '='; 225 } 226 227 /* 228 * Decode %xx escapes in given string, `in-place'. 229 */ 230 static void 231 url_decode(url) 232 char *url; 233 { 234 unsigned char *p, *q; 235 236 if (EMPTYSTRING(url)) 237 return; 238 p = q = (unsigned char *)url; 239 240 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 241 while (*p) { 242 if (p[0] == '%' 243 && p[1] && isxdigit((unsigned char)p[1]) 244 && p[2] && isxdigit((unsigned char)p[2])) { 245 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 246 p+=3; 247 } else 248 *q++ = *p++; 249 } 250 *q = '\0'; 251 } 252 253 254 /* 255 * Parse URL of form: 256 * <type>://[<user>[:<password>@]]<host>[:<port>][/<path>] 257 * Returns -1 if a parse error occurred, otherwise 0. 258 * It's the caller's responsibility to url_decode() the returned 259 * user, pass and path. 260 * 261 * Sets type to url_t, each of the given char ** pointers to a 262 * malloc(3)ed strings of the relevant section, and port to 263 * the number given, or ftpport if ftp://, or httpport if http://. 264 * 265 * If <host> is surrounded by `[' and ']', it's parsed as an 266 * IPv6 address (as per draft-ietf-ipngwg-url-literal-01.txt). 267 * 268 * XXX: this is not totally RFC 1738 compliant; <path> will have the 269 * leading `/' unless it's an ftp:// URL, as this makes things easier 270 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 271 * host and the url-path removed, but any additional leading slashes 272 * in the url-path are retained (because they imply that we should 273 * later do "CWD" with a null argument). 274 * 275 * Examples: 276 * input url output path 277 * --------- ----------- 278 * "ftp://host" NULL 279 * "http://host/" NULL 280 * "file://host/dir/file" "dir/file" 281 * "ftp://host/" "" 282 * "ftp://host//" NULL 283 * "ftp://host//dir/file" "/dir/file" 284 */ 285 static int 286 parse_url(url, desc, type, user, pass, host, port, portnum, path) 287 const char *url; 288 const char *desc; 289 url_t *type; 290 char **user; 291 char **pass; 292 char **host; 293 char **port; 294 in_port_t *portnum; 295 char **path; 296 { 297 const char *origurl; 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 || portnum == NULL 303 || path == NULL) 304 errx(1, "parse_url: invoked with NULL argument!"); 305 306 origurl = url; 307 *type = UNKNOWN_URL_T; 308 *user = *pass = *host = *port = *path = NULL; 309 *portnum = 0; 310 tport = NULL; 311 312 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 313 url += sizeof(HTTP_URL) - 1; 314 *type = HTTP_URL_T; 315 *portnum = HTTP_PORT; 316 tport = httpport; 317 } else if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 318 url += sizeof(FTP_URL) - 1; 319 *type = FTP_URL_T; 320 *portnum = FTP_PORT; 321 tport = ftpport; 322 } else if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 323 url += sizeof(FILE_URL) - 1; 324 *type = FILE_URL_T; 325 } else { 326 warnx("Invalid %s `%s'", desc, url); 327 cleanup_parse_url: 328 FREEPTR(*user); 329 FREEPTR(*pass); 330 FREEPTR(*host); 331 FREEPTR(*port); 332 FREEPTR(*path); 333 return (-1); 334 } 335 336 if (*url == '\0') 337 return (0); 338 339 /* find [user[:pass]@]host[:port] */ 340 ep = strchr(url, '/'); 341 if (ep == NULL) 342 thost = xstrdup(url); 343 else { 344 len = ep - url; 345 thost = (char *)xmalloc(len + 1); 346 (void)strlcpy(thost, url, len + 1); 347 if (*type == FTP_URL_T) /* skip first / for ftp URLs */ 348 ep++; 349 *path = xstrdup(ep); 350 } 351 352 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 353 if (cp != NULL) { 354 if (*type == FTP_URL_T) 355 anonftp = 0; /* disable anonftp */ 356 *user = thost; 357 *cp = '\0'; 358 thost = xstrdup(cp + 1); 359 cp = strchr(*user, ':'); 360 if (cp != NULL) { 361 *cp = '\0'; 362 *pass = xstrdup(cp + 1); 363 } 364 } 365 366 #ifdef INET6 367 /* 368 * Check if thost is an encoded IPv6 address, as per 369 * draft-ietf-ipngwg-url-literal-01.txt: 370 * `[' ipv6-address ']' 371 */ 372 if (*thost == '[') { 373 cp = thost + 1; 374 if ((ep = strchr(cp, ']')) == NULL || 375 (ep[1] != '\0' && ep[1] != '\0')) { 376 warnx("Invalid address `%s' in %s `%s'", 377 thost, desc, origurl); 378 goto cleanup_parse_url; 379 } 380 len = ep - cp; /* change `[xxx]' -> `xxx' */ 381 memmove(thost, thost + 1, len); 382 thost[len] = '\0'; 383 if (! isipv6addr(thost)) { 384 warnx("Invalid IPv6 address `%s' in %s `%s'", 385 thost, desc, origurl); 386 goto cleanup_parse_url; 387 } 388 cp = ep + 1; 389 if (*cp == ':') 390 cp++; 391 else 392 cp = NULL; 393 } else 394 #endif /* INET6 */ 395 if ((cp = strchr(thost, ':')) != NULL) 396 *cp++ = '\0'; 397 *host = thost; 398 399 /* look for [:port] */ 400 if (cp != NULL) { 401 long nport; 402 403 nport = strtol(cp, &ep, 10); 404 if (*ep != '\0' && ep == cp) { 405 struct servent *svp; 406 407 svp = getservbyname(cp, "tcp"); 408 if (svp == NULL) { 409 warnx("Unknown port `%s' in %s `%s'", 410 cp, desc, origurl); 411 goto cleanup_parse_url; 412 } else 413 nport = ntohs(svp->s_port); 414 } else if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0') { 415 warnx("Invalid port `%s' in %s `%s'", cp, desc, 416 origurl); 417 goto cleanup_parse_url; 418 } 419 *portnum = nport; 420 tport = cp; 421 } 422 423 if (tport != NULL); 424 *port = xstrdup(tport); 425 if (*path == NULL) 426 *path = xstrdup(""); 427 428 if (debug) 429 fprintf(ttyout, 430 "parse_url: user `%s' pass `%s' host %s:%s(%d) path `%s'\n", 431 *user ? *user : "<null>", *pass ? *pass : "<null>", 432 *host ? *host : "<null>", *port ? *port : "<null>", 433 *portnum ? *portnum : -1, *path ? *path : "<null>"); 434 435 return (0); 436 } 437 438 jmp_buf httpabort; 439 440 /* 441 * Retrieve URL, via a proxy if necessary, using HTTP. 442 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 443 * http_proxy as appropriate. 444 * Supports HTTP redirects. 445 * Returns -1 on failure, 0 on completed xfer, 1 if ftp connection 446 * is still open (e.g, ftp xfer with trailing /) 447 */ 448 static int 449 fetch_url(url, proxyenv, proxyauth, wwwauth) 450 const char *url; 451 const char *proxyenv; 452 char *proxyauth; 453 char *wwwauth; 454 { 455 #ifdef NI_NUMERICHOST 456 struct addrinfo hints, *res = NULL; 457 int error; 458 #else 459 struct sockaddr_in sin; 460 struct hostent *hp = NULL; 461 #endif 462 volatile sig_t oldintr, oldintp; 463 volatile int s; 464 int ischunked, isproxy, rval, hcode; 465 size_t len; 466 static size_t bufsize; 467 static char *xferbuf; 468 char *cp, *ep, *buf, *savefile; 469 char *auth, *location, *message; 470 char *user, *pass, *host, *port, *path, *decodedpath; 471 char *puser, *ppass; 472 off_t hashbytes; 473 int (*closefunc) __P((FILE *)); 474 FILE *fin, *fout; 475 time_t mtime; 476 url_t urltype; 477 in_port_t portnum; 478 479 closefunc = NULL; 480 fin = fout = NULL; 481 s = -1; 482 buf = savefile = NULL; 483 auth = location = message = NULL; 484 ischunked = isproxy = hcode = 0; 485 rval = 1; 486 user = pass = host = path = decodedpath = puser = ppass = NULL; 487 488 #ifdef __GNUC__ /* shut up gcc warnings */ 489 (void)&closefunc; 490 (void)&fin; 491 (void)&fout; 492 (void)&buf; 493 (void)&savefile; 494 (void)&rval; 495 (void)&isproxy; 496 (void)&hcode; 497 (void)&ischunked; 498 (void)&message; 499 (void)&location; 500 (void)&auth; 501 (void)&decodedpath; 502 #endif 503 504 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port, 505 &portnum, &path) == -1) 506 goto cleanup_fetch_url; 507 508 if (urltype == FILE_URL_T && ! EMPTYSTRING(host) 509 && strcasecmp(host, "localhost") != 0) { 510 warnx("No support for non local file URL `%s'", url); 511 goto cleanup_fetch_url; 512 } 513 514 if (EMPTYSTRING(path)) { 515 if (urltype == FTP_URL_T) { 516 rval = fetch_ftp(url); 517 goto cleanup_fetch_url; 518 } 519 if (urltype != HTTP_URL_T || outfile == NULL) { 520 warnx("Invalid URL (no file after host) `%s'", url); 521 goto cleanup_fetch_url; 522 } 523 } 524 525 decodedpath = xstrdup(path); 526 url_decode(decodedpath); 527 528 if (outfile) 529 savefile = xstrdup(outfile); 530 else { 531 cp = strrchr(decodedpath, '/'); /* find savefile */ 532 if (cp != NULL) 533 savefile = xstrdup(cp + 1); 534 else 535 savefile = xstrdup(decodedpath); 536 } 537 if (EMPTYSTRING(savefile)) { 538 if (urltype == FTP_URL_T) { 539 rval = fetch_ftp(url); 540 goto cleanup_fetch_url; 541 } 542 warnx("Invalid URL (no file after directory) `%s'", url); 543 goto cleanup_fetch_url; 544 } else { 545 if (debug) 546 fprintf(ttyout, "got savefile as `%s'\n", savefile); 547 } 548 549 filesize = -1; 550 mtime = -1; 551 if (urltype == FILE_URL_T) { /* file:// URLs */ 552 struct stat sb; 553 554 direction = "copied"; 555 fin = fopen(decodedpath, "r"); 556 if (fin == NULL) { 557 warn("Cannot open file `%s'", decodedpath); 558 goto cleanup_fetch_url; 559 } 560 if (fstat(fileno(fin), &sb) == 0) { 561 mtime = sb.st_mtime; 562 filesize = sb.st_size; 563 } 564 if (verbose) 565 fprintf(ttyout, "Copying %s\n", decodedpath); 566 } else { /* ftp:// or http:// URLs */ 567 char *leading; 568 int hasleading; 569 570 if (proxyenv == NULL) { 571 if (urltype == HTTP_URL_T) 572 proxyenv = httpproxy; 573 else if (urltype == FTP_URL_T) 574 proxyenv = ftpproxy; 575 } 576 direction = "retrieved"; 577 if (proxyenv != NULL) { /* use proxy */ 578 url_t purltype; 579 char *phost, *ppath; 580 char *pport; 581 582 isproxy = 1; 583 584 /* check URL against list of no_proxied sites */ 585 if (no_proxy != NULL) { 586 char *np, *np_copy; 587 long np_port; 588 size_t hlen, plen; 589 590 np_copy = xstrdup(no_proxy); 591 hlen = strlen(host); 592 while ((cp = strsep(&np_copy, " ,")) != NULL) { 593 if (*cp == '\0') 594 continue; 595 if ((np = strrchr(cp, ':')) != NULL) { 596 *np = '\0'; 597 np_port = 598 strtol(np + 1, &ep, 10); 599 if (*ep != '\0') 600 continue; 601 if (np_port != portnum) 602 continue; 603 } 604 plen = strlen(cp); 605 if (strncasecmp(host + hlen - plen, 606 cp, plen) == 0) { 607 isproxy = 0; 608 break; 609 } 610 } 611 FREEPTR(np_copy); 612 } 613 614 if (isproxy) { 615 if (parse_url(proxyenv, "proxy URL", &purltype, 616 &puser, &ppass, &phost, &pport, &portnum, 617 &ppath) == -1) 618 goto cleanup_fetch_url; 619 620 if ((purltype != HTTP_URL_T 621 && purltype != FTP_URL_T) || 622 EMPTYSTRING(phost) || 623 (! EMPTYSTRING(ppath) 624 && strcmp(ppath, "/") != 0)) { 625 warnx("Malformed proxy URL `%s'", 626 proxyenv); 627 FREEPTR(phost); 628 FREEPTR(pport); 629 FREEPTR(ppath); 630 goto cleanup_fetch_url; 631 } 632 633 FREEPTR(host); 634 host = phost; 635 FREEPTR(port); 636 port = pport; 637 FREEPTR(path); 638 path = xstrdup(url); 639 FREEPTR(ppath); 640 } 641 } /* proxyenv != NULL */ 642 643 #ifndef NI_NUMERICHOST 644 memset(&sin, 0, sizeof(sin)); 645 sin.sin_family = AF_INET; 646 647 if (isdigit((unsigned char)host[0])) { 648 if (inet_aton(host, &sin.sin_addr) == 0) { 649 warnx("Invalid IP address `%s'", host); 650 goto cleanup_fetch_url; 651 } 652 } else { 653 hp = gethostbyname(host); 654 if (hp == NULL) { 655 warnx("%s: %s", host, hstrerror(h_errno)); 656 goto cleanup_fetch_url; 657 } 658 if (hp->h_addrtype != AF_INET) { 659 warnx("`%s': not an Internet address?", host); 660 goto cleanup_fetch_url; 661 } 662 if (hp->h_length > sizeof(sin.sin_addr)) 663 hp->h_length = sizeof(sin.sin_addr); 664 memcpy(&sin.sin_addr, hp->h_addr, hp->h_length); 665 } 666 sin.sin_port = htons(portnum); 667 668 s = socket(AF_INET, SOCK_STREAM, 0); 669 if (s == -1) { 670 warn("Can't create socket"); 671 goto cleanup_fetch_url; 672 } 673 674 while (xconnect(s, (struct sockaddr *)&sin, 675 sizeof(sin)) == -1) { 676 if (errno == EINTR) 677 continue; 678 if (hp && hp->h_addr_list[1]) { 679 int oerrno = errno; 680 char *ia; 681 682 ia = inet_ntoa(sin.sin_addr); 683 errno = oerrno; 684 warn("Connect to address `%s'", ia); 685 hp->h_addr_list++; 686 memcpy(&sin.sin_addr, hp->h_addr_list[0], 687 (size_t)hp->h_length); 688 if (verbose) 689 fprintf(ttyout, "Trying %s...\n", 690 inet_ntoa(sin.sin_addr)); 691 (void)close(s); 692 s = socket(AF_INET, SOCK_STREAM, 0); 693 if (s < 0) { 694 warn("Can't create socket"); 695 goto cleanup_fetch_url; 696 } 697 continue; 698 } 699 warn("Can't connect to `%s'", host); 700 goto cleanup_fetch_url; 701 } 702 #else 703 memset(&hints, 0, sizeof(hints)); 704 hints.ai_flags = 0; 705 hints.ai_family = AF_UNSPEC; 706 hints.ai_socktype = SOCK_STREAM; 707 hints.ai_protocol = 0; 708 error = getaddrinfo(host, port, &hints, &res); 709 if (error) { 710 warnx(gai_strerror(error)); 711 goto cleanup_fetch_url; 712 } 713 714 while (1) { 715 s = socket(res->ai_family, 716 res->ai_socktype, res->ai_protocol); 717 if (s < 0) { 718 warn("Can't create socket"); 719 goto cleanup_fetch_url; 720 } 721 722 if (xconnect(s, res->ai_addr, res->ai_addrlen) < 0) { 723 char hbuf[MAXHOSTNAMELEN]; 724 getnameinfo(res->ai_addr, res->ai_addrlen, 725 hbuf, sizeof(hbuf), NULL, 0, 726 NI_NUMERICHOST); 727 warn("Connect to address `%s'", hbuf); 728 close(s); 729 res = res->ai_next; 730 if (res) { 731 getnameinfo(res->ai_addr, 732 res->ai_addrlen, hbuf, sizeof(hbuf), 733 NULL, 0, NI_NUMERICHOST); 734 if (verbose) 735 fprintf(ttyout, 736 "Trying %s...\n", hbuf); 737 continue; 738 } 739 warn("Can't connect to %s", host); 740 goto cleanup_fetch_url; 741 } 742 743 break; 744 } 745 #endif 746 747 748 fin = fdopen(s, "r+"); 749 /* 750 * Construct and send the request. 751 */ 752 if (verbose) 753 fprintf(ttyout, "Requesting %s\n", url); 754 leading = " ("; 755 hasleading = 0; 756 if (isproxy) { 757 if (verbose) { 758 fprintf(ttyout, "%svia %s:%s", leading, 759 host, port); 760 leading = ", "; 761 hasleading++; 762 } 763 fprintf(fin, "GET %s HTTP/1.0\r\n", path); 764 if (flushcache) 765 fprintf(fin, "Pragma: no-cache\r\n"); 766 } else { 767 struct utsname unam; 768 769 fprintf(fin, "GET %s HTTP/1.1\r\n", path); 770 fprintf(fin, "Host: %s:%s\r\n", host, port); 771 fprintf(fin, "Accept: */*\r\n"); 772 if (uname(&unam) != -1) { 773 fprintf(fin, "User-Agent: %s-%s/ftp\r\n", 774 unam.sysname, unam.release); 775 } 776 fprintf(fin, "Connection: close\r\n"); 777 if (flushcache) 778 fprintf(fin, "Cache-Control: no-cache\r\n"); 779 } 780 if (wwwauth) { 781 if (verbose) { 782 fprintf(ttyout, "%swith authorization", 783 leading); 784 leading = ", "; 785 hasleading++; 786 } 787 fprintf(fin, "Authorization: %s\r\n", wwwauth); 788 } 789 if (proxyauth) { 790 if (verbose) { 791 fprintf(ttyout, 792 "%swith proxy authorization", leading); 793 leading = ", "; 794 hasleading++; 795 } 796 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 797 } 798 if (verbose && hasleading) 799 fputs(")\n", ttyout); 800 fprintf(fin, "\r\n"); 801 if (fflush(fin) == EOF) { 802 warn("Writing HTTP request"); 803 goto cleanup_fetch_url; 804 } 805 806 /* Read the response */ 807 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) == NULL) { 808 warn("Receiving HTTP reply"); 809 goto cleanup_fetch_url; 810 } 811 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 812 buf[--len] = '\0'; 813 if (debug) 814 fprintf(ttyout, "received `%s'\n", buf); 815 816 /* Determine HTTP response code */ 817 cp = strchr(buf, ' '); 818 if (cp == NULL) 819 goto improper; 820 else 821 cp++; 822 hcode = strtol(cp, &ep, 10); 823 if (*ep != '\0' && !isspace((unsigned char)*ep)) 824 goto improper; 825 message = xstrdup(cp); 826 827 /* Read the rest of the header. */ 828 FREEPTR(buf); 829 while (1) { 830 if ((buf = fparseln(fin, &len, NULL, "\0\0\0", 0)) 831 == NULL) { 832 warn("Receiving HTTP reply"); 833 goto cleanup_fetch_url; 834 } 835 while (len > 0 && 836 (buf[len-1] == '\r' || buf[len-1] == '\n')) 837 buf[--len] = '\0'; 838 if (len == 0) 839 break; 840 if (debug) 841 fprintf(ttyout, "received `%s'\n", buf); 842 843 /* Look for some headers */ 844 cp = buf; 845 846 #define CONTENTLEN "Content-Length: " 847 if (strncasecmp(cp, CONTENTLEN, 848 sizeof(CONTENTLEN) - 1) == 0) { 849 cp += sizeof(CONTENTLEN) - 1; 850 filesize = strtol(cp, &ep, 10); 851 if (filesize < 1 || *ep != '\0') 852 goto improper; 853 if (debug) 854 fprintf(ttyout, 855 #ifndef NO_QUAD 856 "parsed length as: %lld\n", 857 (long long)filesize); 858 #else 859 "parsed length as: %ld\n", 860 (long)filesize); 861 #endif 862 863 #define LASTMOD "Last-Modified: " 864 } else if (strncasecmp(cp, LASTMOD, 865 sizeof(LASTMOD) - 1) == 0) { 866 struct tm parsed; 867 char *t; 868 869 cp += sizeof(LASTMOD) - 1; 870 /* RFC 1123 */ 871 if ((t = strptime(cp, 872 "%a, %d %b %Y %H:%M:%S GMT", 873 &parsed)) 874 /* RFC 850 */ 875 || (t = strptime(cp, 876 "%a, %d-%b-%y %H:%M:%S GMT", 877 &parsed)) 878 /* asctime */ 879 || (t = strptime(cp, 880 "%a, %b %d %H:%M:%S %Y", 881 &parsed))) { 882 parsed.tm_isdst = -1; 883 if (*t == '\0') 884 mtime = timegm(&parsed); 885 if (debug && mtime != -1) { 886 fprintf(ttyout, 887 "parsed date as: %s", 888 ctime(&mtime)); 889 } 890 } 891 892 #define LOCATION "Location: " 893 } else if (strncasecmp(cp, LOCATION, 894 sizeof(LOCATION) - 1) == 0) { 895 cp += sizeof(LOCATION) - 1; 896 location = xstrdup(cp); 897 if (debug) 898 fprintf(ttyout, 899 "parsed location as: %s\n", cp); 900 901 #define TRANSENC "Transfer-Encoding: " 902 } else if (strncasecmp(cp, TRANSENC, 903 sizeof(TRANSENC) - 1) == 0) { 904 cp += sizeof(TRANSENC) - 1; 905 if (strcasecmp(cp, "chunked") != 0) { 906 warnx( 907 "Unsupported transfer encoding - `%s'", 908 cp); 909 goto cleanup_fetch_url; 910 } 911 ischunked++; 912 if (debug) 913 fprintf(ttyout, 914 "using chunked encoding\n"); 915 916 #define PROXYAUTH "Proxy-Authenticate: " 917 } else if (strncasecmp(cp, PROXYAUTH, 918 sizeof(PROXYAUTH) - 1) == 0) { 919 cp += sizeof(PROXYAUTH) - 1; 920 FREEPTR(auth); 921 auth = xstrdup(cp); 922 if (debug) 923 fprintf(ttyout, 924 "parsed proxy-auth as: %s\n", cp); 925 926 #define WWWAUTH "WWW-Authenticate: " 927 } else if (strncasecmp(cp, WWWAUTH, 928 sizeof(WWWAUTH) - 1) == 0) { 929 cp += sizeof(WWWAUTH) - 1; 930 FREEPTR(auth); 931 auth = xstrdup(cp); 932 if (debug) 933 fprintf(ttyout, 934 "parsed www-auth as: %s\n", cp); 935 936 } 937 938 } 939 /* finished parsing header */ 940 FREEPTR(buf); 941 942 switch (hcode) { 943 case 200: 944 break; 945 case 300: 946 case 301: 947 case 302: 948 case 303: 949 case 305: 950 if (EMPTYSTRING(location)) { 951 warnx( 952 "No redirection Location provided by server"); 953 goto cleanup_fetch_url; 954 } 955 if (redirect_loop++ > 5) { 956 warnx("Too many redirections requested"); 957 goto cleanup_fetch_url; 958 } 959 if (hcode == 305) { 960 if (verbose) 961 fprintf(ttyout, "Redirected via %s\n", 962 location); 963 rval = fetch_url(url, location, 964 proxyauth, wwwauth); 965 } else { 966 if (verbose) 967 fprintf(ttyout, "Redirected to %s\n", 968 location); 969 rval = go_fetch(location); 970 } 971 goto cleanup_fetch_url; 972 case 401: 973 case 407: 974 { 975 char **authp; 976 char *auser, *apass; 977 978 fprintf(ttyout, "%s\n", message); 979 if (EMPTYSTRING(auth)) { 980 warnx( 981 "No authentication challenge provided by server"); 982 goto cleanup_fetch_url; 983 } 984 if (hcode == 401) { 985 authp = &wwwauth; 986 auser = user; 987 apass = pass; 988 } else { 989 authp = &proxyauth; 990 auser = puser; 991 apass = ppass; 992 } 993 if (*authp != NULL) { 994 char reply[10]; 995 996 fprintf(ttyout, 997 "Authorization failed. Retry (y/n)? "); 998 if (fgets(reply, sizeof(reply), stdin) != NULL 999 && tolower(reply[0]) != 'y') 1000 goto cleanup_fetch_url; 1001 auser = NULL; 1002 apass = NULL; 1003 } 1004 if (auth_url(auth, authp, auser, apass) == 0) { 1005 rval = fetch_url(url, proxyenv, 1006 proxyauth, wwwauth); 1007 memset(*authp, 0, strlen(*authp)); 1008 FREEPTR(*authp); 1009 } 1010 goto cleanup_fetch_url; 1011 } 1012 default: 1013 if (message) 1014 warnx("Error retrieving file - `%s'", message); 1015 else 1016 warnx("Unknown error retrieving file"); 1017 goto cleanup_fetch_url; 1018 } 1019 } /* end of ftp:// or http:// specific setup */ 1020 1021 oldintr = oldintp = NULL; 1022 1023 /* Open the output file. */ 1024 if (strcmp(savefile, "-") == 0) { 1025 fout = stdout; 1026 } else if (*savefile == '|') { 1027 oldintp = xsignal(SIGPIPE, SIG_IGN); 1028 fout = popen(savefile + 1, "w"); 1029 if (fout == NULL) { 1030 warn("Can't run `%s'", savefile + 1); 1031 goto cleanup_fetch_url; 1032 } 1033 closefunc = pclose; 1034 } else { 1035 fout = fopen(savefile, "w"); 1036 if (fout == NULL) { 1037 warn("Can't open `%s'", savefile); 1038 goto cleanup_fetch_url; 1039 } 1040 closefunc = fclose; 1041 } 1042 1043 /* Trap signals */ 1044 if (setjmp(httpabort)) { 1045 if (oldintr) 1046 (void)xsignal(SIGINT, oldintr); 1047 if (oldintp) 1048 (void)xsignal(SIGPIPE, oldintp); 1049 goto cleanup_fetch_url; 1050 } 1051 oldintr = xsignal(SIGINT, aborthttp); 1052 1053 if (rcvbuf_size > bufsize) { 1054 if (xferbuf) 1055 (void)free(xferbuf); 1056 bufsize = rcvbuf_size; 1057 xferbuf = xmalloc(bufsize); 1058 } 1059 1060 bytes = 0; 1061 hashbytes = mark; 1062 progressmeter(-1); 1063 1064 /* Finally, suck down the file. */ 1065 do { 1066 long chunksize; 1067 1068 chunksize = 0; 1069 /* read chunksize */ 1070 if (ischunked) { 1071 if (fgets(xferbuf, bufsize, fin) == NULL) { 1072 warnx("Unexpected EOF reading chunksize"); 1073 goto cleanup_fetch_url; 1074 } 1075 chunksize = strtol(xferbuf, &ep, 16); 1076 if (strcmp(ep, "\r\n") != 0) { 1077 warnx("Unexpected data following chunksize"); 1078 goto cleanup_fetch_url; 1079 } 1080 if (debug) 1081 fprintf(ttyout, 1082 #ifndef NO_QUAD 1083 "got chunksize of %lld\n", 1084 (long long)chunksize); 1085 #else 1086 "got chunksize of %ld\n", 1087 (long)chunksize); 1088 #endif 1089 if (chunksize == 0) 1090 break; 1091 } 1092 /* transfer file or chunk */ 1093 while (1) { 1094 struct timeval then, now, td; 1095 off_t bufrem; 1096 1097 if (rate_get) 1098 (void)gettimeofday(&then, NULL); 1099 bufrem = rate_get ? rate_get : bufsize; 1100 while (bufrem > 0) { 1101 len = fread(xferbuf, sizeof(char), 1102 ischunked ? MIN(chunksize, bufrem) 1103 : bufsize, fin); 1104 if (len <= 0) 1105 goto chunkdone; 1106 bytes += len; 1107 bufrem -= len; 1108 if (fwrite(xferbuf, sizeof(char), len, fout) 1109 != len) { 1110 warn("Writing `%s'", savefile); 1111 goto cleanup_fetch_url; 1112 } 1113 } 1114 if (hash && !progress) { 1115 while (bytes >= hashbytes) { 1116 (void)putc('#', ttyout); 1117 hashbytes += mark; 1118 } 1119 (void)fflush(ttyout); 1120 } 1121 if (ischunked) { 1122 chunksize -= len; 1123 if (chunksize <= 0) 1124 goto chunkdone; 1125 } 1126 if (rate_get) { 1127 while (1) { 1128 (void)gettimeofday(&now, NULL); 1129 timersub(&now, &then, &td); 1130 if (td.tv_sec > 0) 1131 break; 1132 usleep(1000000 - td.tv_usec); 1133 } 1134 } 1135 } 1136 /* read CRLF after chunk*/ 1137 chunkdone: 1138 if (ischunked) { 1139 if (fgets(xferbuf, bufsize, fin) == NULL) 1140 break; 1141 if (strcmp(xferbuf, "\r\n") != 0) { 1142 warnx("Unexpected data following chunk"); 1143 goto cleanup_fetch_url; 1144 } 1145 } 1146 } while (ischunked); 1147 if (hash && !progress && bytes > 0) { 1148 if (bytes < mark) 1149 (void)putc('#', ttyout); 1150 (void)putc('\n', ttyout); 1151 } 1152 if (ferror(fin)) { 1153 warn("Reading file"); 1154 goto cleanup_fetch_url; 1155 } 1156 progressmeter(1); 1157 (void)fflush(fout); 1158 (void)xsignal(SIGINT, oldintr); 1159 if (oldintp) 1160 (void)xsignal(SIGPIPE, oldintp); 1161 if (closefunc == fclose && mtime != -1) { 1162 struct timeval tval[2]; 1163 1164 (void)gettimeofday(&tval[0], NULL); 1165 tval[1].tv_sec = mtime; 1166 tval[1].tv_usec = 0; 1167 (*closefunc)(fout); 1168 fout = NULL; 1169 1170 if (utimes(savefile, tval) == -1) { 1171 fprintf(ttyout, 1172 "Can't change modification time to %s", 1173 asctime(localtime(&mtime))); 1174 } 1175 } 1176 if (bytes > 0) 1177 ptransfer(0); 1178 1179 rval = 0; 1180 goto cleanup_fetch_url; 1181 1182 improper: 1183 warnx("Improper response from `%s'", host); 1184 1185 cleanup_fetch_url: 1186 if (fin != NULL) 1187 fclose(fin); 1188 else if (s != -1) 1189 close(s); 1190 if (closefunc != NULL && fout != NULL) 1191 (*closefunc)(fout); 1192 #ifdef NI_NUMERICHOST 1193 if (res != NULL) 1194 freeaddrinfo(res); 1195 #endif 1196 FREEPTR(savefile); 1197 FREEPTR(user); 1198 FREEPTR(pass); 1199 FREEPTR(host); 1200 FREEPTR(port); 1201 FREEPTR(path); 1202 FREEPTR(decodedpath); 1203 FREEPTR(puser); 1204 FREEPTR(ppass); 1205 FREEPTR(buf); 1206 FREEPTR(auth); 1207 FREEPTR(location); 1208 FREEPTR(message); 1209 return (rval); 1210 } 1211 1212 /* 1213 * Abort a HTTP retrieval 1214 */ 1215 void 1216 aborthttp(notused) 1217 int notused; 1218 { 1219 1220 alarmtimer(0); 1221 fputs("\nHTTP fetch aborted.\n", ttyout); 1222 longjmp(httpabort, 1); 1223 } 1224 1225 /* 1226 * Retrieve ftp URL or classic ftp argument using FTP. 1227 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1228 * is still open (e.g, ftp xfer with trailing /) 1229 */ 1230 static int 1231 fetch_ftp(url) 1232 const char *url; 1233 { 1234 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1235 char *host, *path, *dir, *file, *user, *pass; 1236 char *port; 1237 int dirhasglob, filehasglob, oautologin, rval, type, xargc; 1238 in_port_t portnum; 1239 url_t urltype; 1240 1241 host = path = dir = file = user = pass = NULL; 1242 port = NULL; 1243 rval = 1; 1244 type = TYPE_I; 1245 1246 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1247 if ((parse_url(url, "URL", &urltype, &user, &pass, 1248 &host, &port, &portnum, &path) == -1) || 1249 (user != NULL && *user == '\0') || 1250 (pass != NULL && *pass == '\0') || 1251 EMPTYSTRING(host)) { 1252 warnx("Invalid URL `%s'", url); 1253 goto cleanup_fetch_ftp; 1254 } 1255 url_decode(user); 1256 url_decode(pass); 1257 /* 1258 * Note: Don't url_decode(path) here. We need to keep the 1259 * distinction between "/" and "%2F" until later. 1260 */ 1261 1262 /* check for trailing ';type=[aid]' */ 1263 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) { 1264 if (strcasecmp(cp, ";type=a") == 0) 1265 type = TYPE_A; 1266 else if (strcasecmp(cp, ";type=i") == 0) 1267 type = TYPE_I; 1268 else if (strcasecmp(cp, ";type=d") == 0) { 1269 warnx( 1270 "Directory listing via a URL is not supported"); 1271 goto cleanup_fetch_ftp; 1272 } else { 1273 warnx("Invalid suffix `%s' in URL `%s'", cp, 1274 url); 1275 goto cleanup_fetch_ftp; 1276 } 1277 *cp = 0; 1278 } 1279 } else { /* classic style `host:file' */ 1280 urltype = CLASSIC_URL_T; 1281 host = xstrdup(url); 1282 cp = strchr(host, ':'); 1283 if (cp != NULL) { 1284 *cp = '\0'; 1285 path = xstrdup(cp + 1); 1286 } 1287 } 1288 if (EMPTYSTRING(host)) 1289 goto cleanup_fetch_ftp; 1290 1291 /* Extract the file and (if present) directory name. */ 1292 dir = path; 1293 if (! EMPTYSTRING(dir)) { 1294 /* 1295 * If we are dealing with classic `host:path' syntax, 1296 * then a path of the form `/file' (resulting from 1297 * input of the form `host:/file') means that we should 1298 * do "CWD /" before retrieving the file. So we set 1299 * dir="/" and file="file". 1300 * 1301 * But if we are dealing with URLs like 1302 * `ftp://host/path' then a path of the form `/file' 1303 * (resulting from a URL of the form `ftp://host//file') 1304 * means that we should do `CWD ' (with an empty 1305 * argument) before retrieving the file. So we set 1306 * dir="" and file="file". 1307 * 1308 * If the path does not contain / at all, we set 1309 * dir=NULL. (We get a path without any slashes if 1310 * we are dealing with classic `host:file' or URL 1311 * `ftp://host/file'.) 1312 * 1313 * In all other cases, we set dir to a string that does 1314 * not include the final '/' that separates the dir part 1315 * from the file part of the path. (This will be the 1316 * empty string if and only if we are dealing with a 1317 * path of the form `/file' resulting from an URL of the 1318 * form `ftp://host//file'.) 1319 */ 1320 cp = strrchr(dir, '/'); 1321 if (cp == dir && urltype == CLASSIC_URL_T) { 1322 file = cp + 1; 1323 dir = "/"; 1324 } else if (cp != NULL) { 1325 *cp++ = '\0'; 1326 file = cp; 1327 } else { 1328 file = dir; 1329 dir = NULL; 1330 } 1331 } else 1332 dir = NULL; 1333 if (urltype == FTP_URL_T && file != NULL) { 1334 url_decode(file); 1335 /* but still don't url_decode(dir) */ 1336 } 1337 if (debug) 1338 fprintf(ttyout, 1339 "fetch_ftp: user `%s' pass `%s' host %s:%s path `%s' dir `%s' file `%s'\n", 1340 user ? user : "<null>", pass ? pass : "<null>", 1341 host ? host : "<null>", port ? port : "<null>", 1342 path ? path : "<null>", 1343 dir ? dir : "<null>", file ? file : "<null>"); 1344 1345 dirhasglob = filehasglob = 0; 1346 if (doglob && urltype == CLASSIC_URL_T) { 1347 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1348 dirhasglob = 1; 1349 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1350 filehasglob = 1; 1351 } 1352 1353 /* Set up the connection */ 1354 if (connected) 1355 disconnect(0, NULL); 1356 xargv[0] = __progname; 1357 xargv[1] = host; 1358 xargv[2] = NULL; 1359 xargc = 2; 1360 if (port) { 1361 xargv[2] = port; 1362 xargv[3] = NULL; 1363 xargc = 3; 1364 } 1365 oautologin = autologin; 1366 if (user != NULL) 1367 autologin = 0; 1368 setpeer(xargc, xargv); 1369 autologin = oautologin; 1370 if ((connected == 0) || ((connected == 1) 1371 && !ftp_login(host, user, pass))) { 1372 warnx("Can't connect or login to host `%s'", host); 1373 goto cleanup_fetch_ftp; 1374 } 1375 1376 switch (type) { 1377 case TYPE_A: 1378 setascii(0, NULL); 1379 break; 1380 case TYPE_I: 1381 setbinary(0, NULL); 1382 break; 1383 default: 1384 errx(1, "fetch_ftp: unknown transfer type %d\n", type); 1385 } 1386 1387 /* 1388 * Change directories, if necessary. 1389 * 1390 * Note: don't use EMPTYSTRING(dir) below, because 1391 * dir=="" means something different from dir==NULL. 1392 */ 1393 if (dir != NULL && !dirhasglob) { 1394 char *nextpart; 1395 1396 /* 1397 * If we are dealing with a classic `host:path' (urltype 1398 * is CLASSIC_URL_T) then we have a raw directory 1399 * name (not encoded in any way) and we can change 1400 * directories in one step. 1401 * 1402 * If we are dealing with an `ftp://host/path' URL 1403 * (urltype is FTP_URL_T), then RFC 1738 says we need to 1404 * send a separate CWD command for each unescaped "/" 1405 * in the path, and we have to interpret %hex escaping 1406 * *after* we find the slashes. It's possible to get 1407 * empty components here, (from multiple adjacent 1408 * slashes in the path) and RFC 1738 says that we should 1409 * still do `CWD ' (with a null argument) in such cases. 1410 * 1411 * Many ftp servers don't support `CWD ', so if there's an 1412 * error performing that command, bail out with a descriptive 1413 * message. 1414 * 1415 * Examples: 1416 * 1417 * host: dir="", urltype=CLASSIC_URL_T 1418 * logged in (to default directory) 1419 * host:file dir=NULL, urltype=CLASSIC_URL_T 1420 * "RETR file" 1421 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1422 * "CWD dir", logged in 1423 * ftp://host/ dir="", urltype=FTP_URL_T 1424 * logged in (to default directory) 1425 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1426 * "CWD dir", logged in 1427 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1428 * "RETR file" 1429 * ftp://host//file dir="", urltype=FTP_URL_T 1430 * "CWD ", "RETR file" 1431 * host:/file dir="/", urltype=CLASSIC_URL_T 1432 * "CWD /", "RETR file" 1433 * ftp://host///file dir="/", urltype=FTP_URL_T 1434 * "CWD ", "CWD ", "RETR file" 1435 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1436 * "CWD /", "RETR file" 1437 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1438 * "CWD foo", "RETR file" 1439 * ftp://host/foo/bar/file dir="foo/bar" 1440 * "CWD foo", "CWD bar", "RETR file" 1441 * ftp://host//foo/bar/file dir="/foo/bar" 1442 * "CWD ", "CWD foo", "CWD bar", "RETR file" 1443 * ftp://host/foo//bar/file dir="foo//bar" 1444 * "CWD foo", "CWD ", "CWD bar", "RETR file" 1445 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 1446 * "CWD /", "CWD foo", "CWD bar", "RETR file" 1447 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 1448 * "CWD /foo", "CWD bar", "RETR file" 1449 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 1450 * "CWD /foo/bar", "RETR file" 1451 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 1452 * "RETR /foo/bar/file" 1453 * 1454 * Note that we don't need `dir' after this point. 1455 */ 1456 do { 1457 if (urltype == FTP_URL_T) { 1458 nextpart = strchr(dir, '/'); 1459 if (nextpart) { 1460 *nextpart = '\0'; 1461 nextpart++; 1462 } 1463 url_decode(dir); 1464 } else 1465 nextpart = NULL; 1466 if (debug) 1467 fprintf(ttyout, "dir `%s', nextpart `%s'\n", 1468 dir ? dir : "<null>", 1469 nextpart ? nextpart : "<null>"); 1470 if (urltype == FTP_URL_T || *dir != '\0') { 1471 xargv[0] = "cd"; 1472 xargv[1] = dir; 1473 xargv[2] = NULL; 1474 dirchange = 0; 1475 cd(2, xargv); 1476 if (! dirchange) { 1477 if (*dir == '\0' && code == 500) 1478 fprintf(stderr, 1479 "\n" 1480 "ftp: The `CWD ' command (without a directory), which is required by\n" 1481 " RFC 1738 to support the empty directory in the URL pathname (`//'),\n" 1482 " conflicts with the server's conformance to RFC 959.\n" 1483 " Try the same URL without the `//' in the URL pathname.\n" 1484 "\n"); 1485 goto cleanup_fetch_ftp; 1486 } 1487 } 1488 dir = nextpart; 1489 } while (dir != NULL); 1490 } 1491 1492 if (EMPTYSTRING(file)) { 1493 rval = -1; 1494 goto cleanup_fetch_ftp; 1495 } 1496 1497 if (dirhasglob) { 1498 (void)strlcpy(rempath, dir, sizeof(rempath)); 1499 (void)strlcat(rempath, "/", sizeof(rempath)); 1500 (void)strlcat(rempath, file, sizeof(rempath)); 1501 file = rempath; 1502 } 1503 1504 /* Fetch the file(s). */ 1505 xargc = 2; 1506 xargv[0] = "get"; 1507 xargv[1] = file; 1508 xargv[2] = NULL; 1509 if (dirhasglob || filehasglob) { 1510 int ointeractive; 1511 1512 ointeractive = interactive; 1513 interactive = 0; 1514 xargv[0] = "mget"; 1515 mget(xargc, xargv); 1516 interactive = ointeractive; 1517 } else { 1518 if (outfile == NULL) { 1519 cp = strrchr(file, '/'); /* find savefile */ 1520 if (cp != NULL) 1521 outfile = cp + 1; 1522 else 1523 outfile = file; 1524 } 1525 xargv[2] = (char *)outfile; 1526 xargv[3] = NULL; 1527 xargc++; 1528 if (restartautofetch) 1529 reget(xargc, xargv); 1530 else 1531 get(xargc, xargv); 1532 } 1533 1534 if ((code / 100) == COMPLETE) 1535 rval = 0; 1536 1537 cleanup_fetch_ftp: 1538 FREEPTR(host); 1539 FREEPTR(path); 1540 FREEPTR(user); 1541 FREEPTR(pass); 1542 return (rval); 1543 } 1544 1545 /* 1546 * Retrieve the given file to outfile. 1547 * Supports arguments of the form: 1548 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 1549 * call fetch_ftp() 1550 * "http://host/path" call fetch_url() to use HTTP 1551 * "file:///path" call fetch_url() to copy 1552 * "about:..." print a message 1553 * 1554 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1555 * is still open (e.g, ftp xfer with trailing /) 1556 */ 1557 static int 1558 go_fetch(url) 1559 const char *url; 1560 { 1561 1562 #ifndef NO_ABOUT 1563 /* 1564 * Check for about:* 1565 */ 1566 if (strncasecmp(url, ABOUT_URL, sizeof(ABOUT_URL) - 1) == 0) { 1567 url += sizeof(ABOUT_URL) -1; 1568 if (strcasecmp(url, "ftp") == 0) { 1569 fprintf(ttyout, "%s\n%s\n", 1570 "This version of ftp has been enhanced by Luke Mewburn <lukem (at) netbsd.org>.", 1571 "Execute `man ftp' for more details."); 1572 } else if (strcasecmp(url, "netbsd") == 0) { 1573 fprintf(ttyout, "%s\n%s\n", 1574 "NetBSD is a freely available and redistributable UNIX-like operating system.", 1575 "For more information, see http://www.netbsd.org/index.html"); 1576 } else { 1577 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 1578 } 1579 return (0); 1580 } 1581 #endif /* NO_ABOUT */ 1582 1583 /* 1584 * Check for file:// and http:// URLs. 1585 */ 1586 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1587 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) 1588 return (fetch_url(url, NULL, NULL, NULL)); 1589 1590 /* 1591 * Try FTP URL-style and host:file arguments next. 1592 * If ftpproxy is set with an FTP URL, use fetch_url() 1593 * Othewise, use fetch_ftp(). 1594 */ 1595 if (ftpproxy && strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) 1596 return (fetch_url(url, NULL, NULL, NULL)); 1597 1598 return (fetch_ftp(url)); 1599 } 1600 1601 /* 1602 * Retrieve multiple files from the command line, 1603 * calling go_fetch() for each file. 1604 * 1605 * If an ftp path has a trailing "/", the path will be cd-ed into and 1606 * the connection remains open, and the function will return -1 1607 * (to indicate the connection is alive). 1608 * If an error occurs the return value will be the offset+1 in 1609 * argv[] of the file that caused a problem (i.e, argv[x] 1610 * returns x+1) 1611 * Otherwise, 0 is returned if all files retrieved successfully. 1612 */ 1613 int 1614 auto_fetch(argc, argv) 1615 int argc; 1616 char *argv[]; 1617 { 1618 volatile int argpos; 1619 int rval; 1620 1621 argpos = 0; 1622 1623 if (setjmp(toplevel)) { 1624 if (connected) 1625 disconnect(0, NULL); 1626 return (argpos + 1); 1627 } 1628 (void)xsignal(SIGINT, (sig_t)intr); 1629 (void)xsignal(SIGPIPE, (sig_t)lostpeer); 1630 1631 /* 1632 * Loop through as long as there's files to fetch. 1633 */ 1634 for (rval = 0; (rval == 0) && (argpos < argc); argpos++) { 1635 if (strchr(argv[argpos], ':') == NULL) 1636 break; 1637 redirect_loop = 0; 1638 anonftp = 1; /* Handle "automatic" transfers. */ 1639 rval = go_fetch(argv[argpos]); 1640 if (outfile != NULL && strcmp(outfile, "-") != 0 1641 && outfile[0] != '|') 1642 outfile = NULL; 1643 if (rval > 0) 1644 rval = argpos + 1; 1645 } 1646 1647 if (connected && rval != -1) 1648 disconnect(0, NULL); 1649 return (rval); 1650 } 1651
Indexes created Mon Sep 22 13:09:51 GMT 2025