1 /* $NetBSD: fetch.c,v 1.231 2019/04/04 00:36:09 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2015 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 * This code is derived from software contributed to The NetBSD Foundation 11 * by Scott Aaron Bamford. 12 * 13 * This code is derived from software contributed to The NetBSD Foundation 14 * by Thomas Klausner. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 #ifndef lint 40 __RCSID("$NetBSD: fetch.c,v 1.231 2019/04/04 00:36:09 christos Exp $"); 41 #endif /* not lint */ 42 43 /* 44 * FTP User Program -- Command line file retrieval 45 */ 46 47 #include <sys/types.h> 48 #include <sys/param.h> 49 #include <sys/socket.h> 50 #include <sys/stat.h> 51 #include <sys/time.h> 52 53 #include <netinet/in.h> 54 55 #include <arpa/ftp.h> 56 #include <arpa/inet.h> 57 58 #include <assert.h> 59 #include <ctype.h> 60 #include <err.h> 61 #include <errno.h> 62 #include <netdb.h> 63 #include <fcntl.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <unistd.h> 68 #include <time.h> 69 70 #include "ssl.h" 71 #include "ftp_var.h" 72 #include "version.h" 73 74 typedef enum { 75 UNKNOWN_URL_T=-1, 76 HTTP_URL_T, 77 HTTPS_URL_T, 78 FTP_URL_T, 79 FILE_URL_T, 80 CLASSIC_URL_T 81 } url_t; 82 83 struct authinfo { 84 char *auth; 85 char *user; 86 char *pass; 87 }; 88 89 struct urlinfo { 90 char *host; 91 char *port; 92 char *path; 93 url_t utype; 94 in_port_t portnum; 95 }; 96 97 struct posinfo { 98 off_t rangestart; 99 off_t rangeend; 100 off_t entitylen; 101 }; 102 103 __dead static void aborthttp(int); 104 __dead static void timeouthttp(int); 105 #ifndef NO_AUTH 106 static int auth_url(const char *, char **, const struct authinfo *); 107 static void base64_encode(const unsigned char *, size_t, unsigned char *); 108 #endif 109 static int go_fetch(const char *); 110 static int fetch_ftp(const char *); 111 static int fetch_url(const char *, const char *, char *, char *); 112 static const char *match_token(const char **, const char *); 113 static int parse_url(const char *, const char *, struct urlinfo *, 114 struct authinfo *); 115 static void url_decode(char *); 116 static void freeauthinfo(struct authinfo *); 117 static void freeurlinfo(struct urlinfo *); 118 119 static int redirect_loop; 120 121 122 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0) 123 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t') 124 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0) 125 126 127 #define ABOUT_URL "about:" /* propaganda */ 128 #define FILE_URL "file://" /* file URL prefix */ 129 #define FTP_URL "ftp://" /* ftp URL prefix */ 130 #define HTTP_URL "http://" /* http URL prefix */ 131 #ifdef WITH_SSL 132 #define HTTPS_URL "https://" /* https URL prefix */ 133 134 #define IS_HTTP_TYPE(urltype) \ 135 (((urltype) == HTTP_URL_T) || ((urltype) == HTTPS_URL_T)) 136 #else 137 #define IS_HTTP_TYPE(urltype) \ 138 ((urltype) == HTTP_URL_T) 139 #endif 140 141 /* 142 * Determine if token is the next word in buf (case insensitive). 143 * If so, advance buf past the token and any trailing LWS, and 144 * return a pointer to the token (in buf). Otherwise, return NULL. 145 * token may be preceded by LWS. 146 * token must be followed by LWS or NUL. (I.e, don't partial match). 147 */ 148 static const char * 149 match_token(const char **buf, const char *token) 150 { 151 const char *p, *orig; 152 size_t tlen; 153 154 tlen = strlen(token); 155 p = *buf; 156 SKIPLWS(p); 157 orig = p; 158 if (strncasecmp(p, token, tlen) != 0) 159 return NULL; 160 p += tlen; 161 if (*p != '\0' && !ISLWS(*p)) 162 return NULL; 163 SKIPLWS(p); 164 orig = *buf; 165 *buf = p; 166 return orig; 167 } 168 169 static void 170 initposinfo(struct posinfo *pi) 171 { 172 pi->rangestart = pi->rangeend = pi->entitylen = -1; 173 } 174 175 static void 176 initauthinfo(struct authinfo *ai, char *auth) 177 { 178 ai->auth = auth; 179 ai->user = ai->pass = 0; 180 } 181 182 static void 183 freeauthinfo(struct authinfo *a) 184 { 185 FREEPTR(a->user); 186 if (a->pass != NULL) 187 memset(a->pass, 0, strlen(a->pass)); 188 FREEPTR(a->pass); 189 } 190 191 static void 192 initurlinfo(struct urlinfo *ui) 193 { 194 ui->host = ui->port = ui->path = 0; 195 ui->utype = UNKNOWN_URL_T; 196 ui->portnum = 0; 197 } 198 199 static void 200 copyurlinfo(struct urlinfo *dui, struct urlinfo *sui) 201 { 202 dui->host = ftp_strdup(sui->host); 203 dui->port = ftp_strdup(sui->port); 204 dui->path = ftp_strdup(sui->path); 205 dui->utype = sui->utype; 206 dui->portnum = sui->portnum; 207 } 208 209 static void 210 freeurlinfo(struct urlinfo *ui) 211 { 212 FREEPTR(ui->host); 213 FREEPTR(ui->port); 214 FREEPTR(ui->path); 215 } 216 217 #ifndef NO_AUTH 218 /* 219 * Generate authorization response based on given authentication challenge. 220 * Returns -1 if an error occurred, otherwise 0. 221 * Sets response to a malloc(3)ed string; caller should free. 222 */ 223 static int 224 auth_url(const char *challenge, char **response, const struct authinfo *auth) 225 { 226 const char *cp, *scheme, *errormsg; 227 char *ep, *clear, *realm; 228 char uuser[BUFSIZ], *gotpass; 229 const char *upass; 230 int rval; 231 size_t len, clen, rlen; 232 233 *response = NULL; 234 clear = realm = NULL; 235 rval = -1; 236 cp = challenge; 237 scheme = "Basic"; /* only support Basic authentication */ 238 gotpass = NULL; 239 240 DPRINTF("auth_url: challenge `%s'\n", challenge); 241 242 if (! match_token(&cp, scheme)) { 243 warnx("Unsupported authentication challenge `%s'", 244 challenge); 245 goto cleanup_auth_url; 246 } 247 248 #define REALM "realm=\"" 249 if (STRNEQUAL(cp, REALM)) 250 cp += sizeof(REALM) - 1; 251 else { 252 warnx("Unsupported authentication challenge `%s'", 253 challenge); 254 goto cleanup_auth_url; 255 } 256 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 257 if ((ep = strchr(cp, '\"')) != NULL) { 258 len = ep - cp; 259 realm = (char *)ftp_malloc(len + 1); 260 (void)strlcpy(realm, cp, len + 1); 261 } else { 262 warnx("Unsupported authentication challenge `%s'", 263 challenge); 264 goto cleanup_auth_url; 265 } 266 267 fprintf(ttyout, "Username for `%s': ", realm); 268 if (auth->user != NULL) { 269 (void)strlcpy(uuser, auth->user, sizeof(uuser)); 270 fprintf(ttyout, "%s\n", uuser); 271 } else { 272 (void)fflush(ttyout); 273 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) { 274 warnx("%s; can't authenticate", errormsg); 275 goto cleanup_auth_url; 276 } 277 } 278 if (auth->pass != NULL) 279 upass = auth->pass; 280 else { 281 gotpass = getpass("Password: "); 282 if (gotpass == NULL) { 283 warnx("Can't read password"); 284 goto cleanup_auth_url; 285 } 286 upass = gotpass; 287 } 288 289 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */ 290 clear = (char *)ftp_malloc(clen); 291 (void)strlcpy(clear, uuser, clen); 292 (void)strlcat(clear, ":", clen); 293 (void)strlcat(clear, upass, clen); 294 if (gotpass) 295 memset(gotpass, 0, strlen(gotpass)); 296 297 /* scheme + " " + enc + "\0" */ 298 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 299 *response = ftp_malloc(rlen); 300 (void)strlcpy(*response, scheme, rlen); 301 len = strlcat(*response, " ", rlen); 302 /* use `clen - 1' to not encode the trailing NUL */ 303 base64_encode((unsigned char *)clear, clen - 1, 304 (unsigned char *)*response + len); 305 memset(clear, 0, clen); 306 rval = 0; 307 308 cleanup_auth_url: 309 FREEPTR(clear); 310 FREEPTR(realm); 311 return (rval); 312 } 313 314 /* 315 * Encode len bytes starting at clear using base64 encoding into encoded, 316 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 317 */ 318 static void 319 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 320 { 321 static const unsigned char enc[] = 322 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 323 unsigned char *cp; 324 size_t i; 325 326 cp = encoded; 327 for (i = 0; i < len; i += 3) { 328 *(cp++) = enc[((clear[i + 0] >> 2))]; 329 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 330 | ((clear[i + 1] >> 4) & 0x0f)]; 331 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 332 | ((clear[i + 2] >> 6) & 0x03)]; 333 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 334 } 335 *cp = '\0'; 336 while (i-- > len) 337 *(--cp) = '='; 338 } 339 #endif 340 341 /* 342 * Decode %xx escapes in given string, `in-place'. 343 */ 344 static void 345 url_decode(char *url) 346 { 347 unsigned char *p, *q; 348 349 if (EMPTYSTRING(url)) 350 return; 351 p = q = (unsigned char *)url; 352 353 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 354 while (*p) { 355 if (p[0] == '%' 356 && p[1] && isxdigit((unsigned char)p[1]) 357 && p[2] && isxdigit((unsigned char)p[2])) { 358 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 359 p+=3; 360 } else 361 *q++ = *p++; 362 } 363 *q = '\0'; 364 } 365 366 367 /* 368 * Parse URL of form (per RFC 3986): 369 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 370 * Returns -1 if a parse error occurred, otherwise 0. 371 * It's the caller's responsibility to url_decode() the returned 372 * user, pass and path. 373 * 374 * Sets type to url_t, each of the given char ** pointers to a 375 * malloc(3)ed strings of the relevant section, and port to 376 * the number given, or ftpport if ftp://, or httpport if http://. 377 * 378 * XXX: this is not totally RFC 3986 compliant; <path> will have the 379 * leading `/' unless it's an ftp:// URL, as this makes things easier 380 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 381 * host and the URL-path removed, but any additional leading slashes 382 * in the URL-path are retained (because they imply that we should 383 * later do "CWD" with a null argument). 384 * 385 * Examples: 386 * input URL output path 387 * --------- ----------- 388 * "http://host" "/" 389 * "http://host/" "/" 390 * "http://host/path" "/path" 391 * "file://host/dir/file" "dir/file" 392 * "ftp://host" "" 393 * "ftp://host/" "" 394 * "ftp://host//" "/" 395 * "ftp://host/dir/file" "dir/file" 396 * "ftp://host//dir/file" "/dir/file" 397 */ 398 399 static int 400 parse_url(const char *url, const char *desc, struct urlinfo *ui, 401 struct authinfo *auth) 402 { 403 const char *origurl, *tport; 404 char *cp, *ep, *thost; 405 size_t len; 406 407 if (url == NULL || desc == NULL || ui == NULL || auth == NULL) 408 errx(1, "parse_url: invoked with NULL argument!"); 409 DPRINTF("parse_url: %s `%s'\n", desc, url); 410 411 origurl = url; 412 tport = NULL; 413 414 if (STRNEQUAL(url, HTTP_URL)) { 415 url += sizeof(HTTP_URL) - 1; 416 ui->utype = HTTP_URL_T; 417 ui->portnum = HTTP_PORT; 418 tport = httpport; 419 } else if (STRNEQUAL(url, FTP_URL)) { 420 url += sizeof(FTP_URL) - 1; 421 ui->utype = FTP_URL_T; 422 ui->portnum = FTP_PORT; 423 tport = ftpport; 424 } else if (STRNEQUAL(url, FILE_URL)) { 425 url += sizeof(FILE_URL) - 1; 426 ui->utype = FILE_URL_T; 427 tport = ""; 428 #ifdef WITH_SSL 429 } else if (STRNEQUAL(url, HTTPS_URL)) { 430 url += sizeof(HTTPS_URL) - 1; 431 ui->utype = HTTPS_URL_T; 432 ui->portnum = HTTPS_PORT; 433 tport = httpsport; 434 #endif 435 } else { 436 warnx("Invalid %s `%s'", desc, url); 437 cleanup_parse_url: 438 freeauthinfo(auth); 439 freeurlinfo(ui); 440 return (-1); 441 } 442 443 if (*url == '\0') 444 return (0); 445 446 /* find [user[:pass]@]host[:port] */ 447 ep = strchr(url, '/'); 448 if (ep == NULL) 449 thost = ftp_strdup(url); 450 else { 451 len = ep - url; 452 thost = (char *)ftp_malloc(len + 1); 453 (void)strlcpy(thost, url, len + 1); 454 if (ui->utype == FTP_URL_T) /* skip first / for ftp URLs */ 455 ep++; 456 ui->path = ftp_strdup(ep); 457 } 458 459 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 460 if (cp != NULL) { 461 if (ui->utype == FTP_URL_T) 462 anonftp = 0; /* disable anonftp */ 463 auth->user = thost; 464 *cp = '\0'; 465 thost = ftp_strdup(cp + 1); 466 cp = strchr(auth->user, ':'); 467 if (cp != NULL) { 468 *cp = '\0'; 469 auth->pass = ftp_strdup(cp + 1); 470 } 471 url_decode(auth->user); 472 if (auth->pass) 473 url_decode(auth->pass); 474 } 475 476 #ifdef INET6 477 /* 478 * Check if thost is an encoded IPv6 address, as per 479 * RFC 3986: 480 * `[' ipv6-address ']' 481 */ 482 if (*thost == '[') { 483 cp = thost + 1; 484 if ((ep = strchr(cp, ']')) == NULL || 485 (ep[1] != '\0' && ep[1] != ':')) { 486 warnx("Invalid address `%s' in %s `%s'", 487 thost, desc, origurl); 488 goto cleanup_parse_url; 489 } 490 len = ep - cp; /* change `[xyz]' -> `xyz' */ 491 memmove(thost, thost + 1, len); 492 thost[len] = '\0'; 493 if (! isipv6addr(thost)) { 494 warnx("Invalid IPv6 address `%s' in %s `%s'", 495 thost, desc, origurl); 496 goto cleanup_parse_url; 497 } 498 cp = ep + 1; 499 if (*cp == ':') 500 cp++; 501 else 502 cp = NULL; 503 } else 504 #endif /* INET6 */ 505 if ((cp = strchr(thost, ':')) != NULL) 506 *cp++ = '\0'; 507 ui->host = thost; 508 509 /* look for [:port] */ 510 if (cp != NULL) { 511 unsigned long nport; 512 513 nport = strtoul(cp, &ep, 10); 514 if (*cp == '\0' || *ep != '\0' || 515 nport < 1 || nport > MAX_IN_PORT_T) { 516 warnx("Unknown port `%s' in %s `%s'", 517 cp, desc, origurl); 518 goto cleanup_parse_url; 519 } 520 ui->portnum = nport; 521 tport = cp; 522 } 523 524 if (tport != NULL) 525 ui->port = ftp_strdup(tport); 526 if (ui->path == NULL) { 527 const char *emptypath = "/"; 528 if (ui->utype == FTP_URL_T) /* skip first / for ftp URLs */ 529 emptypath++; 530 ui->path = ftp_strdup(emptypath); 531 } 532 533 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 534 "path `%s'\n", 535 STRorNULL(auth->user), STRorNULL(auth->pass), 536 STRorNULL(ui->host), STRorNULL(ui->port), 537 ui->portnum ? ui->portnum : -1, STRorNULL(ui->path)); 538 539 return (0); 540 } 541 542 sigjmp_buf httpabort; 543 544 static int 545 ftp_socket(const struct urlinfo *ui, void **ssl) 546 { 547 struct addrinfo hints, *res, *res0 = NULL; 548 int error; 549 int s; 550 const char *host = ui->host; 551 const char *port = ui->port; 552 553 if (ui->utype != HTTPS_URL_T) 554 ssl = NULL; 555 556 memset(&hints, 0, sizeof(hints)); 557 hints.ai_flags = 0; 558 hints.ai_family = family; 559 hints.ai_socktype = SOCK_STREAM; 560 hints.ai_protocol = 0; 561 562 error = getaddrinfo(host, port, &hints, &res0); 563 if (error) { 564 warnx("Can't LOOKUP `%s:%s': %s", host, port, 565 (error == EAI_SYSTEM) ? strerror(errno) 566 : gai_strerror(error)); 567 return -1; 568 } 569 570 if (res0->ai_canonname) 571 host = res0->ai_canonname; 572 573 s = -1; 574 if (ssl) 575 *ssl = NULL; 576 for (res = res0; res; res = res->ai_next) { 577 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 578 579 ai_unmapped(res); 580 if (getnameinfo(res->ai_addr, res->ai_addrlen, 581 hname, sizeof(hname), sname, sizeof(sname), 582 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 583 strlcpy(hname, "?", sizeof(hname)); 584 strlcpy(sname, "?", sizeof(sname)); 585 } 586 587 if (verbose && res0->ai_next) { 588 #ifdef INET6 589 if(res->ai_family == AF_INET6) { 590 fprintf(ttyout, "Trying [%s]:%s ...\n", 591 hname, sname); 592 } else { 593 #endif 594 fprintf(ttyout, "Trying %s:%s ...\n", 595 hname, sname); 596 #ifdef INET6 597 } 598 #endif 599 } 600 601 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 602 if (s < 0) { 603 warn( 604 "Can't create socket for connection to " 605 "`%s:%s'", hname, sname); 606 continue; 607 } 608 609 if (ftp_connect(s, res->ai_addr, res->ai_addrlen, 610 verbose || !res->ai_next) < 0) { 611 close(s); 612 s = -1; 613 continue; 614 } 615 616 #ifdef WITH_SSL 617 if (ssl) { 618 if ((*ssl = fetch_start_ssl(s, host)) == NULL) { 619 close(s); 620 s = -1; 621 continue; 622 } 623 } 624 #endif 625 break; 626 } 627 if (res0) 628 freeaddrinfo(res0); 629 return s; 630 } 631 632 static int 633 handle_noproxy(const char *host, in_port_t portnum) 634 { 635 636 char *cp, *ep, *np, *np_copy, *np_iter, *no_proxy; 637 unsigned long np_port; 638 size_t hlen, plen; 639 int isproxy = 1; 640 641 /* check URL against list of no_proxied sites */ 642 no_proxy = getoptionvalue("no_proxy"); 643 if (EMPTYSTRING(no_proxy)) 644 return isproxy; 645 646 np_iter = np_copy = ftp_strdup(no_proxy); 647 hlen = strlen(host); 648 while ((cp = strsep(&np_iter, " ,")) != NULL) { 649 if (*cp == '\0') 650 continue; 651 if ((np = strrchr(cp, ':')) != NULL) { 652 *np++ = '\0'; 653 np_port = strtoul(np, &ep, 10); 654 if (*np == '\0' || *ep != '\0') 655 continue; 656 if (np_port != portnum) 657 continue; 658 } 659 plen = strlen(cp); 660 if (hlen < plen) 661 continue; 662 if (strncasecmp(host + hlen - plen, cp, plen) == 0) { 663 isproxy = 0; 664 break; 665 } 666 } 667 FREEPTR(np_copy); 668 return isproxy; 669 } 670 671 static int 672 handle_proxy(const char *url, const char *penv, struct urlinfo *ui, 673 struct authinfo *pauth) 674 { 675 struct urlinfo pui; 676 677 if (isipv6addr(ui->host) && strchr(ui->host, '%') != NULL) { 678 warnx("Scoped address notation `%s' disallowed via web proxy", 679 ui->host); 680 return -1; 681 } 682 683 initurlinfo(&pui); 684 if (parse_url(penv, "proxy URL", &pui, pauth) == -1) 685 return -1; 686 687 if ((!IS_HTTP_TYPE(pui.utype) && pui.utype != FTP_URL_T) || 688 EMPTYSTRING(pui.host) || 689 (! EMPTYSTRING(pui.path) && strcmp(pui.path, "/") != 0)) { 690 warnx("Malformed proxy URL `%s'", penv); 691 freeurlinfo(&pui); 692 return -1; 693 } 694 695 FREEPTR(pui.path); 696 pui.path = ftp_strdup(url); 697 698 freeurlinfo(ui); 699 *ui = pui; 700 701 return 0; 702 } 703 704 static void 705 print_host(FETCH *fin, const struct urlinfo *ui) 706 { 707 char *h, *p; 708 709 if (strchr(ui->host, ':') == NULL) { 710 fetch_printf(fin, "Host: %s", ui->host); 711 } else { 712 /* 713 * strip off IPv6 scope identifier, since it is 714 * local to the node 715 */ 716 h = ftp_strdup(ui->host); 717 if (isipv6addr(h) && (p = strchr(h, '%')) != NULL) 718 *p = '\0'; 719 720 fetch_printf(fin, "Host: [%s]", h); 721 free(h); 722 } 723 724 if ((ui->utype == HTTP_URL_T && ui->portnum != HTTP_PORT) || 725 (ui->utype == HTTPS_URL_T && ui->portnum != HTTPS_PORT)) 726 fetch_printf(fin, ":%u", ui->portnum); 727 fetch_printf(fin, "\r\n"); 728 } 729 730 static void 731 print_agent(FETCH *fin) 732 { 733 const char *useragent; 734 if ((useragent = getenv("FTPUSERAGENT")) != NULL) { 735 fetch_printf(fin, "User-Agent: %s\r\n", useragent); 736 } else { 737 fetch_printf(fin, "User-Agent: %s/%s\r\n", 738 FTP_PRODUCT, FTP_VERSION); 739 } 740 } 741 742 static void 743 print_cache(FETCH *fin, int isproxy) 744 { 745 fetch_printf(fin, isproxy ? 746 "Pragma: no-cache\r\n" : 747 "Cache-Control: no-cache\r\n"); 748 } 749 750 static int 751 print_get(FETCH *fin, int hasleading, int isproxy, const struct urlinfo *oui, 752 const struct urlinfo *ui) 753 { 754 const char *leading = hasleading ? ", " : " ("; 755 756 if (isproxy) { 757 if (verbose) { 758 fprintf(ttyout, "%svia %s:%u", leading, 759 ui->host, ui->portnum); 760 leading = ", "; 761 hasleading++; 762 } 763 fetch_printf(fin, "GET %s HTTP/1.0\r\n", ui->path); 764 print_host(fin, oui); 765 return hasleading; 766 } 767 768 fetch_printf(fin, "GET %s HTTP/1.1\r\n", ui->path); 769 print_host(fin, ui); 770 fetch_printf(fin, "Accept: */*\r\n"); 771 fetch_printf(fin, "Connection: close\r\n"); 772 if (restart_point) { 773 fputs(leading, ttyout); 774 fetch_printf(fin, "Range: bytes=" LLF "-\r\n", 775 (LLT)restart_point); 776 fprintf(ttyout, "restarting at " LLF, (LLT)restart_point); 777 hasleading++; 778 } 779 return hasleading; 780 } 781 782 static void 783 getmtime(const char *cp, time_t *mtime) 784 { 785 struct tm parsed; 786 const char *t; 787 788 memset(&parsed, 0, sizeof(parsed)); 789 t = parse_rfc2616time(&parsed, cp); 790 791 if (t == NULL) 792 return; 793 794 parsed.tm_isdst = -1; 795 if (*t == '\0') 796 *mtime = timegm(&parsed); 797 798 #ifndef NO_DEBUG 799 if (ftp_debug && *mtime != -1) { 800 fprintf(ttyout, "parsed time as: %s", 801 rfc2822time(localtime(mtime))); 802 } 803 #endif 804 } 805 806 static int 807 print_proxy(FETCH *fin, int hasleading, const char *wwwauth, 808 const char *proxyauth) 809 { 810 const char *leading = hasleading ? ", " : " ("; 811 812 if (wwwauth) { 813 if (verbose) { 814 fprintf(ttyout, "%swith authorization", leading); 815 hasleading++; 816 } 817 fetch_printf(fin, "Authorization: %s\r\n", wwwauth); 818 } 819 if (proxyauth) { 820 if (verbose) { 821 fprintf(ttyout, "%swith proxy authorization", leading); 822 hasleading++; 823 } 824 fetch_printf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 825 } 826 return hasleading; 827 } 828 829 #ifdef WITH_SSL 830 static void 831 print_connect(FETCH *fin, const struct urlinfo *ui) 832 { 833 char hname[NI_MAXHOST], *p; 834 const char *h; 835 836 if (isipv6addr(ui->host)) { 837 /* 838 * strip off IPv6 scope identifier, 839 * since it is local to the node 840 */ 841 if ((p = strchr(ui->host, '%')) == NULL) 842 snprintf(hname, sizeof(hname), "[%s]", ui->host); 843 else 844 snprintf(hname, sizeof(hname), "[%.*s]", 845 (int)(p - ui->host), ui->host); 846 h = hname; 847 } else 848 h = ui->host; 849 850 fetch_printf(fin, "CONNECT %s:%d HTTP/1.1\r\n", h, ui->portnum); 851 fetch_printf(fin, "Host: %s:%d\r\n", h, ui->portnum); 852 } 853 #endif 854 855 #define C_OK 0 856 #define C_CLEANUP 1 857 #define C_IMPROPER 2 858 859 static int 860 getresponseline(FETCH *fin, char *buf, size_t buflen, int *len) 861 { 862 const char *errormsg; 863 864 alarmtimer(quit_time ? quit_time : 60); 865 *len = fetch_getline(fin, buf, buflen, &errormsg); 866 alarmtimer(0); 867 if (*len < 0) { 868 if (*errormsg == '\n') 869 errormsg++; 870 warnx("Receiving HTTP reply: %s", errormsg); 871 return C_CLEANUP; 872 } 873 while (*len > 0 && (ISLWS(buf[*len-1]))) 874 buf[--*len] = '\0'; 875 876 if (*len) 877 DPRINTF("%s: received `%s'\n", __func__, buf); 878 return C_OK; 879 } 880 881 static int 882 getresponse(FETCH *fin, char **cp, size_t buflen, int *hcode) 883 { 884 int len, rv; 885 char *ep, *buf = *cp; 886 887 *hcode = 0; 888 if ((rv = getresponseline(fin, buf, buflen, &len)) != C_OK) 889 return rv; 890 891 /* Determine HTTP response code */ 892 *cp = strchr(buf, ' '); 893 if (*cp == NULL) 894 return C_IMPROPER; 895 896 (*cp)++; 897 898 *hcode = strtol(*cp, &ep, 10); 899 if (*ep != '\0' && !isspace((unsigned char)*ep)) 900 return C_IMPROPER; 901 902 return C_OK; 903 } 904 905 static int 906 parse_posinfo(const char **cp, struct posinfo *pi) 907 { 908 char *ep; 909 if (!match_token(cp, "bytes")) 910 return -1; 911 912 if (**cp == '*') 913 (*cp)++; 914 else { 915 pi->rangestart = STRTOLL(*cp, &ep, 10); 916 if (pi->rangestart < 0 || *ep != '-') 917 return -1; 918 *cp = ep + 1; 919 pi->rangeend = STRTOLL(*cp, &ep, 10); 920 if (pi->rangeend < 0 || pi->rangeend < pi->rangestart) 921 return -1; 922 *cp = ep; 923 } 924 if (**cp != '/') 925 return -1; 926 (*cp)++; 927 if (**cp == '*') 928 (*cp)++; 929 else { 930 pi->entitylen = STRTOLL(*cp, &ep, 10); 931 if (pi->entitylen < 0) 932 return -1; 933 *cp = ep; 934 } 935 if (**cp != '\0') 936 return -1; 937 938 #ifndef NO_DEBUG 939 if (ftp_debug) { 940 fprintf(ttyout, "parsed range as: "); 941 if (pi->rangestart == -1) 942 fprintf(ttyout, "*"); 943 else 944 fprintf(ttyout, LLF "-" LLF, (LLT)pi->rangestart, 945 (LLT)pi->rangeend); 946 fprintf(ttyout, "/" LLF "\n", (LLT)pi->entitylen); 947 } 948 #endif 949 return 0; 950 } 951 952 #ifndef NO_AUTH 953 static void 954 do_auth(int hcode, const char *url, const char *penv, struct authinfo *wauth, 955 struct authinfo *pauth, char **auth, const char *message, 956 volatile int *rval) 957 { 958 struct authinfo aauth; 959 char *response; 960 961 if (hcode == 401) 962 aauth = *wauth; 963 else 964 aauth = *pauth; 965 966 if (verbose || aauth.auth == NULL || 967 aauth.user == NULL || aauth.pass == NULL) 968 fprintf(ttyout, "%s\n", message); 969 if (EMPTYSTRING(*auth)) { 970 warnx("No authentication challenge provided by server"); 971 return; 972 } 973 974 if (aauth.auth != NULL) { 975 char reply[10]; 976 977 fprintf(ttyout, "Authorization failed. Retry (y/n)? "); 978 if (get_line(stdin, reply, sizeof(reply), NULL) < 0) { 979 return; 980 } 981 if (tolower((unsigned char)reply[0]) != 'y') 982 return; 983 984 aauth.user = NULL; 985 aauth.pass = NULL; 986 } 987 988 if (auth_url(*auth, &response, &aauth) == 0) { 989 *rval = fetch_url(url, penv, 990 hcode == 401 ? pauth->auth : response, 991 hcode == 401 ? response: wauth->auth); 992 memset(response, 0, strlen(response)); 993 FREEPTR(response); 994 } 995 } 996 #endif 997 998 static int 999 negotiate_connection(FETCH *fin, const char *url, const char *penv, 1000 struct posinfo *pi, time_t *mtime, struct authinfo *wauth, 1001 struct authinfo *pauth, volatile int *rval, volatile int *ischunked, 1002 char **auth) 1003 { 1004 int len, hcode, rv; 1005 char buf[FTPBUFLEN], *ep; 1006 const char *cp, *token; 1007 char *location, *message; 1008 1009 *auth = message = location = NULL; 1010 1011 /* Read the response */ 1012 ep = buf; 1013 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1014 case C_CLEANUP: 1015 goto cleanup_fetch_url; 1016 case C_IMPROPER: 1017 goto improper; 1018 case C_OK: 1019 message = ftp_strdup(ep); 1020 break; 1021 } 1022 1023 /* Read the rest of the header. */ 1024 1025 for (;;) { 1026 if ((rv = getresponseline(fin, buf, sizeof(buf), &len)) != C_OK) 1027 goto cleanup_fetch_url; 1028 if (len == 0) 1029 break; 1030 1031 /* 1032 * Look for some headers 1033 */ 1034 1035 cp = buf; 1036 1037 if (match_token(&cp, "Content-Length:")) { 1038 filesize = STRTOLL(cp, &ep, 10); 1039 if (filesize < 0 || *ep != '\0') 1040 goto improper; 1041 DPRINTF("%s: parsed len as: " LLF "\n", 1042 __func__, (LLT)filesize); 1043 1044 } else if (match_token(&cp, "Content-Range:")) { 1045 if (parse_posinfo(&cp, pi) == -1) 1046 goto improper; 1047 if (! restart_point) { 1048 warnx( 1049 "Received unexpected Content-Range header"); 1050 goto cleanup_fetch_url; 1051 } 1052 1053 } else if (match_token(&cp, "Last-Modified:")) { 1054 getmtime(cp, mtime); 1055 1056 } else if (match_token(&cp, "Location:")) { 1057 location = ftp_strdup(cp); 1058 DPRINTF("%s: parsed location as `%s'\n", 1059 __func__, cp); 1060 1061 } else if (match_token(&cp, "Transfer-Encoding:")) { 1062 if (match_token(&cp, "binary")) { 1063 warnx( 1064 "Bogus transfer encoding `binary' (fetching anyway)"); 1065 continue; 1066 } 1067 if (! (token = match_token(&cp, "chunked"))) { 1068 warnx( 1069 "Unsupported transfer encoding `%s'", 1070 token); 1071 goto cleanup_fetch_url; 1072 } 1073 (*ischunked)++; 1074 DPRINTF("%s: using chunked encoding\n", 1075 __func__); 1076 1077 } else if (match_token(&cp, "Proxy-Authenticate:") 1078 || match_token(&cp, "WWW-Authenticate:")) { 1079 if (! (token = match_token(&cp, "Basic"))) { 1080 DPRINTF("%s: skipping unknown auth " 1081 "scheme `%s'\n", __func__, token); 1082 continue; 1083 } 1084 FREEPTR(*auth); 1085 *auth = ftp_strdup(token); 1086 DPRINTF("%s: parsed auth as `%s'\n", 1087 __func__, cp); 1088 } 1089 1090 } 1091 /* finished parsing header */ 1092 1093 switch (hcode) { 1094 case 200: 1095 break; 1096 case 206: 1097 if (! restart_point) { 1098 warnx("Not expecting partial content header"); 1099 goto cleanup_fetch_url; 1100 } 1101 break; 1102 case 300: 1103 case 301: 1104 case 302: 1105 case 303: 1106 case 305: 1107 case 307: 1108 if (EMPTYSTRING(location)) { 1109 warnx( 1110 "No redirection Location provided by server"); 1111 goto cleanup_fetch_url; 1112 } 1113 if (redirect_loop++ > 5) { 1114 warnx("Too many redirections requested"); 1115 goto cleanup_fetch_url; 1116 } 1117 if (hcode == 305) { 1118 if (verbose) 1119 fprintf(ttyout, "Redirected via %s\n", 1120 location); 1121 *rval = fetch_url(url, location, 1122 pauth->auth, wauth->auth); 1123 } else { 1124 if (verbose) 1125 fprintf(ttyout, "Redirected to %s\n", 1126 location); 1127 *rval = go_fetch(location); 1128 } 1129 goto cleanup_fetch_url; 1130 #ifndef NO_AUTH 1131 case 401: 1132 case 407: 1133 do_auth(hcode, url, penv, wauth, pauth, auth, message, rval); 1134 goto cleanup_fetch_url; 1135 #endif 1136 default: 1137 if (message) 1138 warnx("Error retrieving file `%s'", message); 1139 else 1140 warnx("Unknown error retrieving file"); 1141 goto cleanup_fetch_url; 1142 } 1143 rv = C_OK; 1144 goto out; 1145 1146 cleanup_fetch_url: 1147 rv = C_CLEANUP; 1148 goto out; 1149 improper: 1150 rv = C_IMPROPER; 1151 goto out; 1152 out: 1153 FREEPTR(message); 1154 FREEPTR(location); 1155 return rv; 1156 } /* end of ftp:// or http:// specific setup */ 1157 1158 #ifdef WITH_SSL 1159 static int 1160 connectmethod(FETCH *fin, const char *url, const char *penv, 1161 struct urlinfo *oui, struct urlinfo *ui, struct authinfo *wauth, 1162 struct authinfo *pauth, char **auth, int *hasleading, volatile int *rval) 1163 { 1164 void *ssl; 1165 int hcode, rv; 1166 const char *cp; 1167 char buf[FTPBUFLEN], *ep; 1168 char *message = NULL; 1169 1170 print_connect(fin, oui); 1171 1172 print_agent(fin); 1173 *hasleading = print_proxy(fin, *hasleading, NULL, pauth->auth); 1174 1175 if (verbose && *hasleading) 1176 fputs(")\n", ttyout); 1177 *hasleading = 0; 1178 1179 fetch_printf(fin, "\r\n"); 1180 if (fetch_flush(fin) == EOF) { 1181 warn("Writing HTTP request"); 1182 alarmtimer(0); 1183 goto cleanup_fetch_url; 1184 } 1185 alarmtimer(0); 1186 1187 /* Read the response */ 1188 ep = buf; 1189 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1190 case C_CLEANUP: 1191 goto cleanup_fetch_url; 1192 case C_IMPROPER: 1193 goto improper; 1194 case C_OK: 1195 message = ftp_strdup(ep); 1196 break; 1197 } 1198 1199 for (;;) { 1200 int len; 1201 if (getresponseline(fin, buf, sizeof(buf), &len) != C_OK) 1202 goto cleanup_fetch_url; 1203 if (len == 0) 1204 break; 1205 1206 cp = buf; 1207 if (match_token(&cp, "Proxy-Authenticate:")) { 1208 const char *token; 1209 if (!(token = match_token(&cp, "Basic"))) { 1210 DPRINTF( 1211 "%s: skipping unknown auth scheme `%s'\n", 1212 __func__, token); 1213 continue; 1214 } 1215 FREEPTR(*auth); 1216 *auth = ftp_strdup(token); 1217 DPRINTF("%s: parsed auth as " "`%s'\n", __func__, cp); 1218 } 1219 } 1220 1221 /* finished parsing header */ 1222 switch (hcode) { 1223 case 200: 1224 break; 1225 #ifndef NO_AUTH 1226 case 407: 1227 do_auth(hcode, url, penv, wauth, pauth, auth, message, rval); 1228 goto cleanup_fetch_url; 1229 #endif 1230 default: 1231 if (message) 1232 warnx("Error proxy connect " "`%s'", message); 1233 else 1234 warnx("Unknown error proxy " "connect"); 1235 goto cleanup_fetch_url; 1236 } 1237 1238 if ((ssl = fetch_start_ssl(fetch_fileno(fin), oui->host)) == NULL) 1239 goto cleanup_fetch_url; 1240 fetch_set_ssl(fin, ssl); 1241 1242 rv = C_OK; 1243 goto out; 1244 improper: 1245 rv = C_IMPROPER; 1246 goto out; 1247 cleanup_fetch_url: 1248 rv = C_CLEANUP; 1249 goto out; 1250 out: 1251 FREEPTR(message); 1252 return rv; 1253 } 1254 #endif 1255 1256 /* 1257 * Retrieve URL, via a proxy if necessary, using HTTP. 1258 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 1259 * http_proxy/https_proxy as appropriate. 1260 * Supports HTTP redirects. 1261 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1262 * is still open (e.g, ftp xfer with trailing /) 1263 */ 1264 static int 1265 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 1266 { 1267 sigfunc volatile oldint; 1268 sigfunc volatile oldpipe; 1269 sigfunc volatile oldalrm; 1270 sigfunc volatile oldquit; 1271 int volatile s; 1272 struct stat sb; 1273 int volatile isproxy; 1274 int volatile rval, ischunked; 1275 size_t flen; 1276 static size_t bufsize; 1277 static char *xferbuf; 1278 const char *cp; 1279 char *ep; 1280 char *volatile auth; 1281 char *volatile savefile; 1282 char *volatile location; 1283 char *volatile message; 1284 char *volatile decodedpath; 1285 struct authinfo wauth, pauth; 1286 struct posinfo pi; 1287 off_t hashbytes; 1288 int (*volatile closefunc)(FILE *); 1289 FETCH *volatile fin; 1290 FILE *volatile fout; 1291 const char *volatile penv = proxyenv; 1292 struct urlinfo ui, oui; 1293 time_t mtime; 1294 void *ssl = NULL; 1295 1296 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 1297 1298 oldquit = oldalrm = oldint = oldpipe = NULL; 1299 closefunc = NULL; 1300 fin = NULL; 1301 fout = NULL; 1302 s = -1; 1303 savefile = NULL; 1304 auth = location = message = NULL; 1305 ischunked = isproxy = 0; 1306 rval = 1; 1307 1308 initurlinfo(&ui); 1309 initurlinfo(&oui); 1310 initauthinfo(&wauth, wwwauth); 1311 initauthinfo(&pauth, proxyauth); 1312 1313 decodedpath = NULL; 1314 1315 if (sigsetjmp(httpabort, 1)) 1316 goto cleanup_fetch_url; 1317 1318 if (parse_url(url, "URL", &ui, &wauth) == -1) 1319 goto cleanup_fetch_url; 1320 1321 copyurlinfo(&oui, &ui); 1322 1323 if (ui.utype == FILE_URL_T && ! EMPTYSTRING(ui.host) 1324 && strcasecmp(ui.host, "localhost") != 0) { 1325 warnx("No support for non local file URL `%s'", url); 1326 goto cleanup_fetch_url; 1327 } 1328 1329 if (EMPTYSTRING(ui.path)) { 1330 if (ui.utype == FTP_URL_T) { 1331 rval = fetch_ftp(url); 1332 goto cleanup_fetch_url; 1333 } 1334 if (!IS_HTTP_TYPE(ui.utype) || outfile == NULL) { 1335 warnx("Invalid URL (no file after host) `%s'", url); 1336 goto cleanup_fetch_url; 1337 } 1338 } 1339 1340 decodedpath = ftp_strdup(ui.path); 1341 url_decode(decodedpath); 1342 1343 if (outfile) 1344 savefile = outfile; 1345 else { 1346 cp = strrchr(decodedpath, '/'); /* find savefile */ 1347 if (cp != NULL) 1348 savefile = ftp_strdup(cp + 1); 1349 else 1350 savefile = ftp_strdup(decodedpath); 1351 /* 1352 * Use the first URL we requested not the name after a 1353 * possible redirect, but careful to save it because our 1354 * "safety" check is the match to outfile. 1355 */ 1356 outfile = ftp_strdup(savefile); 1357 } 1358 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 1359 if (EMPTYSTRING(savefile)) { 1360 if (ui.utype == FTP_URL_T) { 1361 rval = fetch_ftp(url); 1362 goto cleanup_fetch_url; 1363 } 1364 warnx("No file after directory (you must specify an " 1365 "output file) `%s'", url); 1366 goto cleanup_fetch_url; 1367 } 1368 1369 restart_point = 0; 1370 filesize = -1; 1371 initposinfo(&pi); 1372 mtime = -1; 1373 if (restartautofetch) { 1374 if (stat(savefile, &sb) == 0) 1375 restart_point = sb.st_size; 1376 } 1377 if (ui.utype == FILE_URL_T) { /* file:// URLs */ 1378 direction = "copied"; 1379 fin = fetch_open(decodedpath, "r"); 1380 if (fin == NULL) { 1381 warn("Can't open `%s'", decodedpath); 1382 goto cleanup_fetch_url; 1383 } 1384 if (fstat(fetch_fileno(fin), &sb) == 0) { 1385 mtime = sb.st_mtime; 1386 filesize = sb.st_size; 1387 } 1388 if (restart_point) { 1389 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 1390 warn("Can't seek to restart `%s'", 1391 decodedpath); 1392 goto cleanup_fetch_url; 1393 } 1394 } 1395 if (verbose) { 1396 fprintf(ttyout, "Copying %s", decodedpath); 1397 if (restart_point) 1398 fprintf(ttyout, " (restarting at " LLF ")", 1399 (LLT)restart_point); 1400 fputs("\n", ttyout); 1401 } 1402 if (0 == rcvbuf_size) { 1403 rcvbuf_size = 8 * 1024; /* XXX */ 1404 } 1405 } else { /* ftp:// or http:// URLs */ 1406 int hasleading; 1407 1408 if (penv == NULL) { 1409 #ifdef WITH_SSL 1410 if (ui.utype == HTTPS_URL_T) 1411 penv = getoptionvalue("https_proxy"); 1412 #endif 1413 if (penv == NULL && IS_HTTP_TYPE(ui.utype)) 1414 penv = getoptionvalue("http_proxy"); 1415 else if (ui.utype == FTP_URL_T) 1416 penv = getoptionvalue("ftp_proxy"); 1417 } 1418 direction = "retrieved"; 1419 if (! EMPTYSTRING(penv)) { /* use proxy */ 1420 1421 isproxy = handle_noproxy(ui.host, ui.portnum); 1422 1423 if (isproxy == 0 && ui.utype == FTP_URL_T) { 1424 rval = fetch_ftp(url); 1425 goto cleanup_fetch_url; 1426 } 1427 1428 if (isproxy) { 1429 if (restart_point) { 1430 warnx( 1431 "Can't restart via proxy URL `%s'", 1432 penv); 1433 goto cleanup_fetch_url; 1434 } 1435 if (handle_proxy(url, penv, &ui, &pauth) < 0) 1436 goto cleanup_fetch_url; 1437 } 1438 } /* ! EMPTYSTRING(penv) */ 1439 1440 s = ftp_socket(&ui, &ssl); 1441 if (s < 0) { 1442 warnx("Can't connect to `%s:%s'", ui.host, ui.port); 1443 goto cleanup_fetch_url; 1444 } 1445 1446 oldalrm = xsignal(SIGALRM, timeouthttp); 1447 alarmtimer(quit_time ? quit_time : 60); 1448 fin = fetch_fdopen(s, "r+"); 1449 fetch_set_ssl(fin, ssl); 1450 alarmtimer(0); 1451 1452 alarmtimer(quit_time ? quit_time : 60); 1453 /* 1454 * Construct and send the request. 1455 */ 1456 if (verbose) 1457 fprintf(ttyout, "Requesting %s\n", url); 1458 1459 hasleading = 0; 1460 #ifdef WITH_SSL 1461 if (isproxy && oui.utype == HTTPS_URL_T) { 1462 switch (connectmethod(fin, url, penv, &oui, &ui, 1463 &wauth, &pauth, __UNVOLATILE(&auth), &hasleading, 1464 &rval)) { 1465 case C_CLEANUP: 1466 goto cleanup_fetch_url; 1467 case C_IMPROPER: 1468 goto improper; 1469 case C_OK: 1470 break; 1471 default: 1472 abort(); 1473 } 1474 } 1475 #endif 1476 1477 hasleading = print_get(fin, hasleading, isproxy, &oui, &ui); 1478 1479 if (flushcache) 1480 print_cache(fin, isproxy); 1481 1482 print_agent(fin); 1483 hasleading = print_proxy(fin, hasleading, wauth.auth, 1484 auth ? NULL : pauth.auth); 1485 if (hasleading) { 1486 hasleading = 0; 1487 if (verbose) 1488 fputs(")\n", ttyout); 1489 } 1490 1491 fetch_printf(fin, "\r\n"); 1492 if (fetch_flush(fin) == EOF) { 1493 warn("Writing HTTP request"); 1494 alarmtimer(0); 1495 goto cleanup_fetch_url; 1496 } 1497 alarmtimer(0); 1498 1499 switch (negotiate_connection(fin, url, penv, &pi, 1500 &mtime, &wauth, &pauth, &rval, &ischunked, 1501 __UNVOLATILE(&auth))) { 1502 case C_OK: 1503 break; 1504 case C_CLEANUP: 1505 goto cleanup_fetch_url; 1506 case C_IMPROPER: 1507 goto improper; 1508 default: 1509 abort(); 1510 } 1511 } 1512 1513 /* Open the output file. */ 1514 1515 /* 1516 * Only trust filenames with special meaning if they came from 1517 * the command line 1518 */ 1519 if (outfile == savefile) { 1520 if (strcmp(savefile, "-") == 0) { 1521 fout = stdout; 1522 } else if (*savefile == '|') { 1523 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1524 fout = popen(savefile + 1, "w"); 1525 if (fout == NULL) { 1526 warn("Can't execute `%s'", savefile + 1); 1527 goto cleanup_fetch_url; 1528 } 1529 closefunc = pclose; 1530 } 1531 } 1532 if (fout == NULL) { 1533 if ((pi.rangeend != -1 && pi.rangeend <= restart_point) || 1534 (pi.rangestart == -1 && 1535 filesize != -1 && filesize <= restart_point)) { 1536 /* already done */ 1537 if (verbose) 1538 fprintf(ttyout, "already done\n"); 1539 rval = 0; 1540 goto cleanup_fetch_url; 1541 } 1542 if (restart_point && pi.rangestart != -1) { 1543 if (pi.entitylen != -1) 1544 filesize = pi.entitylen; 1545 if (pi.rangestart != restart_point) { 1546 warnx( 1547 "Size of `%s' differs from save file `%s'", 1548 url, savefile); 1549 goto cleanup_fetch_url; 1550 } 1551 fout = fopen(savefile, "a"); 1552 } else 1553 fout = fopen(savefile, "w"); 1554 if (fout == NULL) { 1555 warn("Can't open `%s'", savefile); 1556 goto cleanup_fetch_url; 1557 } 1558 closefunc = fclose; 1559 } 1560 1561 /* Trap signals */ 1562 oldquit = xsignal(SIGQUIT, psummary); 1563 oldint = xsignal(SIGINT, aborthttp); 1564 1565 assert(rcvbuf_size > 0); 1566 if ((size_t)rcvbuf_size > bufsize) { 1567 if (xferbuf) 1568 (void)free(xferbuf); 1569 bufsize = rcvbuf_size; 1570 xferbuf = ftp_malloc(bufsize); 1571 } 1572 1573 bytes = 0; 1574 hashbytes = mark; 1575 if (oldalrm) { 1576 (void)xsignal(SIGALRM, oldalrm); 1577 oldalrm = NULL; 1578 } 1579 progressmeter(-1); 1580 1581 /* Finally, suck down the file. */ 1582 do { 1583 long chunksize; 1584 short lastchunk; 1585 1586 chunksize = 0; 1587 lastchunk = 0; 1588 /* read chunk-size */ 1589 if (ischunked) { 1590 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1591 warnx("Unexpected EOF reading chunk-size"); 1592 goto cleanup_fetch_url; 1593 } 1594 errno = 0; 1595 chunksize = strtol(xferbuf, &ep, 16); 1596 if (ep == xferbuf) { 1597 warnx("Invalid chunk-size"); 1598 goto cleanup_fetch_url; 1599 } 1600 if (errno == ERANGE || chunksize < 0) { 1601 errno = ERANGE; 1602 warn("Chunk-size `%.*s'", 1603 (int)(ep-xferbuf), xferbuf); 1604 goto cleanup_fetch_url; 1605 } 1606 1607 /* 1608 * XXX: Work around bug in Apache 1.3.9 and 1609 * 1.3.11, which incorrectly put trailing 1610 * space after the chunk-size. 1611 */ 1612 while (*ep == ' ') 1613 ep++; 1614 1615 /* skip [ chunk-ext ] */ 1616 if (*ep == ';') { 1617 while (*ep && *ep != '\r') 1618 ep++; 1619 } 1620 1621 if (strcmp(ep, "\r\n") != 0) { 1622 warnx("Unexpected data following chunk-size"); 1623 goto cleanup_fetch_url; 1624 } 1625 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1626 (LLT)chunksize); 1627 if (chunksize == 0) { 1628 lastchunk = 1; 1629 goto chunkdone; 1630 } 1631 } 1632 /* transfer file or chunk */ 1633 while (1) { 1634 struct timeval then, now, td; 1635 volatile off_t bufrem; 1636 1637 if (rate_get) 1638 (void)gettimeofday(&then, NULL); 1639 bufrem = rate_get ? rate_get : (off_t)bufsize; 1640 if (ischunked) 1641 bufrem = MIN(chunksize, bufrem); 1642 while (bufrem > 0) { 1643 size_t nr = MIN((off_t)bufsize, bufrem); 1644 flen = fetch_read(xferbuf, sizeof(char), 1645 nr, fin); 1646 if (flen == 0) { 1647 if (fetch_error(fin)) 1648 goto chunkerror; 1649 goto chunkdone; 1650 } 1651 bytes += flen; 1652 bufrem -= flen; 1653 if (fwrite(xferbuf, sizeof(char), flen, fout) 1654 != flen) { 1655 warn("Writing `%s'", savefile); 1656 goto cleanup_fetch_url; 1657 } 1658 if (hash && !progress) { 1659 while (bytes >= hashbytes) { 1660 (void)putc('#', ttyout); 1661 hashbytes += mark; 1662 } 1663 (void)fflush(ttyout); 1664 } 1665 if (ischunked) { 1666 chunksize -= flen; 1667 if (chunksize <= 0) 1668 break; 1669 } 1670 } 1671 if (rate_get) { 1672 while (1) { 1673 (void)gettimeofday(&now, NULL); 1674 timersub(&now, &then, &td); 1675 if (td.tv_sec > 0) 1676 break; 1677 usleep(1000000 - td.tv_usec); 1678 } 1679 } 1680 if (ischunked && chunksize <= 0) 1681 break; 1682 } 1683 /* read CRLF after chunk*/ 1684 chunkdone: 1685 if (ischunked) { 1686 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1687 alarmtimer(0); 1688 warnx("Unexpected EOF reading chunk CRLF"); 1689 goto cleanup_fetch_url; 1690 } 1691 if (strcmp(xferbuf, "\r\n") != 0) { 1692 warnx("Unexpected data following chunk"); 1693 goto cleanup_fetch_url; 1694 } 1695 if (lastchunk) 1696 break; 1697 } 1698 } while (ischunked); 1699 1700 /* XXX: deal with optional trailer & CRLF here? */ 1701 chunkerror: 1702 if (hash && !progress && bytes > 0) { 1703 if (bytes < mark) 1704 (void)putc('#', ttyout); 1705 (void)putc('\n', ttyout); 1706 } 1707 if (fetch_error(fin)) { 1708 warn("Reading file"); 1709 goto cleanup_fetch_url; 1710 } 1711 progressmeter(1); 1712 (void)fflush(fout); 1713 if (closefunc == fclose && mtime != -1) { 1714 struct timeval tval[2]; 1715 1716 (void)gettimeofday(&tval[0], NULL); 1717 tval[1].tv_sec = mtime; 1718 tval[1].tv_usec = 0; 1719 (*closefunc)(fout); 1720 fout = NULL; 1721 1722 if (utimes(savefile, tval) == -1) { 1723 fprintf(ttyout, 1724 "Can't change modification time to %s", 1725 rfc2822time(localtime(&mtime))); 1726 } 1727 } 1728 if (bytes > 0) 1729 ptransfer(0); 1730 bytes = 0; 1731 1732 rval = 0; 1733 goto cleanup_fetch_url; 1734 1735 improper: 1736 warnx("Improper response from `%s:%s'", ui.host, ui.port); 1737 1738 cleanup_fetch_url: 1739 if (oldint) 1740 (void)xsignal(SIGINT, oldint); 1741 if (oldpipe) 1742 (void)xsignal(SIGPIPE, oldpipe); 1743 if (oldalrm) 1744 (void)xsignal(SIGALRM, oldalrm); 1745 if (oldquit) 1746 (void)xsignal(SIGQUIT, oldpipe); 1747 if (fin != NULL) 1748 fetch_close(fin); 1749 else if (s != -1) 1750 close(s); 1751 if (closefunc != NULL && fout != NULL) 1752 (*closefunc)(fout); 1753 if (savefile != outfile) 1754 FREEPTR(savefile); 1755 freeurlinfo(&ui); 1756 freeurlinfo(&oui); 1757 freeauthinfo(&wauth); 1758 freeauthinfo(&pauth); 1759 FREEPTR(decodedpath); 1760 FREEPTR(auth); 1761 FREEPTR(location); 1762 FREEPTR(message); 1763 return (rval); 1764 } 1765 1766 /* 1767 * Abort a HTTP retrieval 1768 */ 1769 static void 1770 aborthttp(int notused) 1771 { 1772 char msgbuf[100]; 1773 int len; 1774 1775 sigint_raised = 1; 1776 alarmtimer(0); 1777 if (fromatty) { 1778 len = snprintf(msgbuf, sizeof(msgbuf), 1779 "\n%s: HTTP fetch aborted.\n", getprogname()); 1780 if (len > 0) 1781 write(fileno(ttyout), msgbuf, len); 1782 } 1783 siglongjmp(httpabort, 1); 1784 } 1785 1786 static void 1787 timeouthttp(int notused) 1788 { 1789 char msgbuf[100]; 1790 int len; 1791 1792 alarmtimer(0); 1793 if (fromatty) { 1794 len = snprintf(msgbuf, sizeof(msgbuf), 1795 "\n%s: HTTP fetch timeout.\n", getprogname()); 1796 if (len > 0) 1797 write(fileno(ttyout), msgbuf, len); 1798 } 1799 siglongjmp(httpabort, 1); 1800 } 1801 1802 /* 1803 * Retrieve ftp URL or classic ftp argument using FTP. 1804 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1805 * is still open (e.g, ftp xfer with trailing /) 1806 */ 1807 static int 1808 fetch_ftp(const char *url) 1809 { 1810 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1811 char *dir, *file; 1812 char cmdbuf[MAXPATHLEN]; 1813 char dirbuf[4]; 1814 int dirhasglob, filehasglob, rval, transtype, xargc; 1815 int oanonftp, oautologin; 1816 struct authinfo auth; 1817 struct urlinfo ui; 1818 1819 DPRINTF("fetch_ftp: `%s'\n", url); 1820 dir = file = NULL; 1821 rval = 1; 1822 transtype = TYPE_I; 1823 1824 initurlinfo(&ui); 1825 initauthinfo(&auth, NULL); 1826 1827 if (STRNEQUAL(url, FTP_URL)) { 1828 if ((parse_url(url, "URL", &ui, &auth) == -1) || 1829 (auth.user != NULL && *auth.user == '\0') || 1830 EMPTYSTRING(ui.host)) { 1831 warnx("Invalid URL `%s'", url); 1832 goto cleanup_fetch_ftp; 1833 } 1834 /* 1835 * Note: Don't url_decode(path) here. We need to keep the 1836 * distinction between "/" and "%2F" until later. 1837 */ 1838 1839 /* check for trailing ';type=[aid]' */ 1840 if (! EMPTYSTRING(ui.path) && (cp = strrchr(ui.path, ';')) != NULL) { 1841 if (strcasecmp(cp, ";type=a") == 0) 1842 transtype = TYPE_A; 1843 else if (strcasecmp(cp, ";type=i") == 0) 1844 transtype = TYPE_I; 1845 else if (strcasecmp(cp, ";type=d") == 0) { 1846 warnx( 1847 "Directory listing via a URL is not supported"); 1848 goto cleanup_fetch_ftp; 1849 } else { 1850 warnx("Invalid suffix `%s' in URL `%s'", cp, 1851 url); 1852 goto cleanup_fetch_ftp; 1853 } 1854 *cp = 0; 1855 } 1856 } else { /* classic style `[user@]host:[file]' */ 1857 ui.utype = CLASSIC_URL_T; 1858 ui.host = ftp_strdup(url); 1859 cp = strchr(ui.host, '@'); 1860 if (cp != NULL) { 1861 *cp = '\0'; 1862 auth.user = ui.host; 1863 anonftp = 0; /* disable anonftp */ 1864 ui.host = ftp_strdup(cp + 1); 1865 } 1866 cp = strchr(ui.host, ':'); 1867 if (cp != NULL) { 1868 *cp = '\0'; 1869 ui.path = ftp_strdup(cp + 1); 1870 } 1871 } 1872 if (EMPTYSTRING(ui.host)) 1873 goto cleanup_fetch_ftp; 1874 1875 /* Extract the file and (if present) directory name. */ 1876 dir = ui.path; 1877 if (! EMPTYSTRING(dir)) { 1878 /* 1879 * If we are dealing with classic `[user@]host:[path]' syntax, 1880 * then a path of the form `/file' (resulting from input of the 1881 * form `host:/file') means that we should do "CWD /" before 1882 * retrieving the file. So we set dir="/" and file="file". 1883 * 1884 * But if we are dealing with URLs like `ftp://host/path' then 1885 * a path of the form `/file' (resulting from a URL of the form 1886 * `ftp://host//file') means that we should do `CWD ' (with an 1887 * empty argument) before retrieving the file. So we set 1888 * dir="" and file="file". 1889 * 1890 * If the path does not contain / at all, we set dir=NULL. 1891 * (We get a path without any slashes if we are dealing with 1892 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1893 * 1894 * In all other cases, we set dir to a string that does not 1895 * include the final '/' that separates the dir part from the 1896 * file part of the path. (This will be the empty string if 1897 * and only if we are dealing with a path of the form `/file' 1898 * resulting from an URL of the form `ftp://host//file'.) 1899 */ 1900 cp = strrchr(dir, '/'); 1901 if (cp == dir && ui.utype == CLASSIC_URL_T) { 1902 file = cp + 1; 1903 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1904 dir = dirbuf; 1905 } else if (cp != NULL) { 1906 *cp++ = '\0'; 1907 file = cp; 1908 } else { 1909 file = dir; 1910 dir = NULL; 1911 } 1912 } else 1913 dir = NULL; 1914 if (ui.utype == FTP_URL_T && file != NULL) { 1915 url_decode(file); 1916 /* but still don't url_decode(dir) */ 1917 } 1918 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1919 "path `%s' dir `%s' file `%s'\n", 1920 STRorNULL(auth.user), STRorNULL(auth.pass), 1921 STRorNULL(ui.host), STRorNULL(ui.port), 1922 STRorNULL(ui.path), STRorNULL(dir), STRorNULL(file)); 1923 1924 dirhasglob = filehasglob = 0; 1925 if (doglob && 1926 (ui.utype == CLASSIC_URL_T || ui.utype == FTP_URL_T)) { 1927 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1928 dirhasglob = 1; 1929 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1930 filehasglob = 1; 1931 } 1932 1933 /* Set up the connection */ 1934 oanonftp = anonftp; 1935 if (connected) 1936 disconnect(0, NULL); 1937 anonftp = oanonftp; 1938 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1939 xargv[0] = cmdbuf; 1940 xargv[1] = ui.host; 1941 xargv[2] = NULL; 1942 xargc = 2; 1943 if (ui.port) { 1944 xargv[2] = ui.port; 1945 xargv[3] = NULL; 1946 xargc = 3; 1947 } 1948 oautologin = autologin; 1949 /* don't autologin in setpeer(), use ftp_login() below */ 1950 autologin = 0; 1951 setpeer(xargc, xargv); 1952 autologin = oautologin; 1953 if ((connected == 0) || 1954 (connected == 1 && !ftp_login(ui.host, auth.user, auth.pass))) { 1955 warnx("Can't connect or login to host `%s:%s'", 1956 ui.host, ui.port ? ui.port : "?"); 1957 goto cleanup_fetch_ftp; 1958 } 1959 1960 switch (transtype) { 1961 case TYPE_A: 1962 setascii(1, xargv); 1963 break; 1964 case TYPE_I: 1965 setbinary(1, xargv); 1966 break; 1967 default: 1968 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1969 } 1970 1971 /* 1972 * Change directories, if necessary. 1973 * 1974 * Note: don't use EMPTYSTRING(dir) below, because 1975 * dir=="" means something different from dir==NULL. 1976 */ 1977 if (dir != NULL && !dirhasglob) { 1978 char *nextpart; 1979 1980 /* 1981 * If we are dealing with a classic `[user@]host:[path]' 1982 * (urltype is CLASSIC_URL_T) then we have a raw directory 1983 * name (not encoded in any way) and we can change 1984 * directories in one step. 1985 * 1986 * If we are dealing with an `ftp://host/path' URL 1987 * (urltype is FTP_URL_T), then RFC 3986 says we need to 1988 * send a separate CWD command for each unescaped "/" 1989 * in the path, and we have to interpret %hex escaping 1990 * *after* we find the slashes. It's possible to get 1991 * empty components here, (from multiple adjacent 1992 * slashes in the path) and RFC 3986 says that we should 1993 * still do `CWD ' (with a null argument) in such cases. 1994 * 1995 * Many ftp servers don't support `CWD ', so if there's an 1996 * error performing that command, bail out with a descriptive 1997 * message. 1998 * 1999 * Examples: 2000 * 2001 * host: dir="", urltype=CLASSIC_URL_T 2002 * logged in (to default directory) 2003 * host:file dir=NULL, urltype=CLASSIC_URL_T 2004 * "RETR file" 2005 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 2006 * "CWD dir", logged in 2007 * ftp://host/ dir="", urltype=FTP_URL_T 2008 * logged in (to default directory) 2009 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 2010 * "CWD dir", logged in 2011 * ftp://host/file dir=NULL, urltype=FTP_URL_T 2012 * "RETR file" 2013 * ftp://host//file dir="", urltype=FTP_URL_T 2014 * "CWD ", "RETR file" 2015 * host:/file dir="/", urltype=CLASSIC_URL_T 2016 * "CWD /", "RETR file" 2017 * ftp://host///file dir="/", urltype=FTP_URL_T 2018 * "CWD ", "CWD ", "RETR file" 2019 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 2020 * "CWD /", "RETR file" 2021 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 2022 * "CWD foo", "RETR file" 2023 * ftp://host/foo/bar/file dir="foo/bar" 2024 * "CWD foo", "CWD bar", "RETR file" 2025 * ftp://host//foo/bar/file dir="/foo/bar" 2026 * "CWD ", "CWD foo", "CWD bar", "RETR file" 2027 * ftp://host/foo//bar/file dir="foo//bar" 2028 * "CWD foo", "CWD ", "CWD bar", "RETR file" 2029 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 2030 * "CWD /", "CWD foo", "CWD bar", "RETR file" 2031 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 2032 * "CWD /foo", "CWD bar", "RETR file" 2033 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 2034 * "CWD /foo/bar", "RETR file" 2035 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 2036 * "RETR /foo/bar/file" 2037 * 2038 * Note that we don't need `dir' after this point. 2039 */ 2040 do { 2041 if (ui.utype == FTP_URL_T) { 2042 nextpart = strchr(dir, '/'); 2043 if (nextpart) { 2044 *nextpart = '\0'; 2045 nextpart++; 2046 } 2047 url_decode(dir); 2048 } else 2049 nextpart = NULL; 2050 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 2051 STRorNULL(dir), STRorNULL(nextpart)); 2052 if (ui.utype == FTP_URL_T || *dir != '\0') { 2053 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 2054 xargv[0] = cmdbuf; 2055 xargv[1] = dir; 2056 xargv[2] = NULL; 2057 dirchange = 0; 2058 cd(2, xargv); 2059 if (! dirchange) { 2060 if (*dir == '\0' && code == 500) 2061 fprintf(stderr, 2062 "\n" 2063 "ftp: The `CWD ' command (without a directory), which is required by\n" 2064 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 2065 " conflicts with the server's conformance to RFC 959.\n" 2066 " Try the same URL without the `//' in the URL pathname.\n" 2067 "\n"); 2068 goto cleanup_fetch_ftp; 2069 } 2070 } 2071 dir = nextpart; 2072 } while (dir != NULL); 2073 } 2074 2075 if (EMPTYSTRING(file)) { 2076 rval = -1; 2077 goto cleanup_fetch_ftp; 2078 } 2079 2080 if (dirhasglob) { 2081 (void)strlcpy(rempath, dir, sizeof(rempath)); 2082 (void)strlcat(rempath, "/", sizeof(rempath)); 2083 (void)strlcat(rempath, file, sizeof(rempath)); 2084 file = rempath; 2085 } 2086 2087 /* Fetch the file(s). */ 2088 xargc = 2; 2089 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 2090 xargv[0] = cmdbuf; 2091 xargv[1] = file; 2092 xargv[2] = NULL; 2093 if (dirhasglob || filehasglob) { 2094 int ointeractive; 2095 2096 ointeractive = interactive; 2097 interactive = 0; 2098 if (restartautofetch) 2099 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 2100 else 2101 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 2102 xargv[0] = cmdbuf; 2103 mget(xargc, xargv); 2104 interactive = ointeractive; 2105 } else { 2106 char *destfile = outfile; 2107 if (destfile == NULL) { 2108 cp = strrchr(file, '/'); /* find savefile */ 2109 if (cp != NULL) 2110 destfile = cp + 1; 2111 else 2112 destfile = file; 2113 } 2114 xargv[2] = (char *)destfile; 2115 xargv[3] = NULL; 2116 xargc++; 2117 if (restartautofetch) 2118 reget(xargc, xargv); 2119 else 2120 get(xargc, xargv); 2121 } 2122 2123 if ((code / 100) == COMPLETE) 2124 rval = 0; 2125 2126 cleanup_fetch_ftp: 2127 freeurlinfo(&ui); 2128 freeauthinfo(&auth); 2129 return (rval); 2130 } 2131 2132 /* 2133 * Retrieve the given file to outfile. 2134 * Supports arguments of the form: 2135 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 2136 * call fetch_ftp() 2137 * "http://host/path" call fetch_url() to use HTTP 2138 * "file:///path" call fetch_url() to copy 2139 * "about:..." print a message 2140 * 2141 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 2142 * is still open (e.g, ftp xfer with trailing /) 2143 */ 2144 static int 2145 go_fetch(const char *url) 2146 { 2147 char *proxyenv; 2148 char *p; 2149 2150 #ifndef NO_ABOUT 2151 /* 2152 * Check for about:* 2153 */ 2154 if (STRNEQUAL(url, ABOUT_URL)) { 2155 url += sizeof(ABOUT_URL) -1; 2156 if (strcasecmp(url, "ftp") == 0 || 2157 strcasecmp(url, "tnftp") == 0) { 2158 fputs( 2159 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 2160 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 2161 } else if (strcasecmp(url, "lukem") == 0) { 2162 fputs( 2163 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 2164 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 2165 } else if (strcasecmp(url, "netbsd") == 0) { 2166 fputs( 2167 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 2168 "For more information, see http://www.NetBSD.org/\n", ttyout); 2169 } else if (strcasecmp(url, "version") == 0) { 2170 fprintf(ttyout, "Version: %s %s%s\n", 2171 FTP_PRODUCT, FTP_VERSION, 2172 #ifdef INET6 2173 "" 2174 #else 2175 " (-IPv6)" 2176 #endif 2177 ); 2178 } else { 2179 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 2180 } 2181 fputs("\n", ttyout); 2182 return (0); 2183 } 2184 #endif 2185 2186 /* 2187 * Check for file:// and http:// URLs. 2188 */ 2189 if (STRNEQUAL(url, HTTP_URL) 2190 #ifdef WITH_SSL 2191 || STRNEQUAL(url, HTTPS_URL) 2192 #endif 2193 || STRNEQUAL(url, FILE_URL)) 2194 return (fetch_url(url, NULL, NULL, NULL)); 2195 2196 /* 2197 * If it contains "://" but does not begin with ftp:// 2198 * or something that was already handled, then it's 2199 * unsupported. 2200 * 2201 * If it contains ":" but not "://" then we assume the 2202 * part before the colon is a host name, not an URL scheme, 2203 * so we don't try to match that here. 2204 */ 2205 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 2206 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 2207 2208 /* 2209 * Try FTP URL-style and host:file arguments next. 2210 * If ftpproxy is set with an FTP URL, use fetch_url() 2211 * Othewise, use fetch_ftp(). 2212 */ 2213 proxyenv = getoptionvalue("ftp_proxy"); 2214 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 2215 return (fetch_url(url, NULL, NULL, NULL)); 2216 2217 return (fetch_ftp(url)); 2218 } 2219 2220 /* 2221 * Retrieve multiple files from the command line, 2222 * calling go_fetch() for each file. 2223 * 2224 * If an ftp path has a trailing "/", the path will be cd-ed into and 2225 * the connection remains open, and the function will return -1 2226 * (to indicate the connection is alive). 2227 * If an error occurs the return value will be the offset+1 in 2228 * argv[] of the file that caused a problem (i.e, argv[x] 2229 * returns x+1) 2230 * Otherwise, 0 is returned if all files retrieved successfully. 2231 */ 2232 int 2233 auto_fetch(int argc, char *argv[]) 2234 { 2235 volatile int argpos, rval; 2236 2237 argpos = rval = 0; 2238 2239 if (sigsetjmp(toplevel, 1)) { 2240 if (connected) 2241 disconnect(0, NULL); 2242 if (rval > 0) 2243 rval = argpos + 1; 2244 return (rval); 2245 } 2246 (void)xsignal(SIGINT, intr); 2247 (void)xsignal(SIGPIPE, lostpeer); 2248 2249 /* 2250 * Loop through as long as there's files to fetch. 2251 */ 2252 for (; (rval == 0) && (argpos < argc); argpos++) { 2253 if (strchr(argv[argpos], ':') == NULL) 2254 break; 2255 redirect_loop = 0; 2256 if (!anonftp) 2257 anonftp = 2; /* Handle "automatic" transfers. */ 2258 rval = go_fetch(argv[argpos]); 2259 if (outfile != NULL && strcmp(outfile, "-") != 0 2260 && outfile[0] != '|') { 2261 FREEPTR(outfile); 2262 } 2263 if (rval > 0) 2264 rval = argpos + 1; 2265 } 2266 2267 if (connected && rval != -1) 2268 disconnect(0, NULL); 2269 return (rval); 2270 } 2271 2272 2273 /* 2274 * Upload multiple files from the command line. 2275 * 2276 * If an error occurs the return value will be the offset+1 in 2277 * argv[] of the file that caused a problem (i.e, argv[x] 2278 * returns x+1) 2279 * Otherwise, 0 is returned if all files uploaded successfully. 2280 */ 2281 int 2282 auto_put(int argc, char **argv, const char *uploadserver) 2283 { 2284 char *uargv[4], *path, *pathsep; 2285 int uargc, rval, argpos; 2286 size_t len; 2287 char cmdbuf[MAX_C_NAME]; 2288 2289 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 2290 uargv[0] = cmdbuf; 2291 uargv[1] = argv[0]; 2292 uargc = 2; 2293 uargv[2] = uargv[3] = NULL; 2294 pathsep = NULL; 2295 rval = 1; 2296 2297 DPRINTF("auto_put: target `%s'\n", uploadserver); 2298 2299 path = ftp_strdup(uploadserver); 2300 len = strlen(path); 2301 if (path[len - 1] != '/' && path[len - 1] != ':') { 2302 /* 2303 * make sure we always pass a directory to auto_fetch 2304 */ 2305 if (argc > 1) { /* more than one file to upload */ 2306 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 2307 free(path); 2308 path = (char *)ftp_malloc(len); 2309 (void)strlcpy(path, uploadserver, len); 2310 (void)strlcat(path, "/", len); 2311 } else { /* single file to upload */ 2312 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 2313 uargv[0] = cmdbuf; 2314 pathsep = strrchr(path, '/'); 2315 if (pathsep == NULL) { 2316 pathsep = strrchr(path, ':'); 2317 if (pathsep == NULL) { 2318 warnx("Invalid URL `%s'", path); 2319 goto cleanup_auto_put; 2320 } 2321 pathsep++; 2322 uargv[2] = ftp_strdup(pathsep); 2323 pathsep[0] = '/'; 2324 } else 2325 uargv[2] = ftp_strdup(pathsep + 1); 2326 pathsep[1] = '\0'; 2327 uargc++; 2328 } 2329 } 2330 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 2331 path, STRorNULL(uargv[2])); 2332 2333 /* connect and cwd */ 2334 rval = auto_fetch(1, &path); 2335 if(rval >= 0) 2336 goto cleanup_auto_put; 2337 2338 rval = 0; 2339 2340 /* target filename provided; upload 1 file */ 2341 /* XXX : is this the best way? */ 2342 if (uargc == 3) { 2343 uargv[1] = argv[0]; 2344 put(uargc, uargv); 2345 if ((code / 100) != COMPLETE) 2346 rval = 1; 2347 } else { /* otherwise a target dir: upload all files to it */ 2348 for(argpos = 0; argv[argpos] != NULL; argpos++) { 2349 uargv[1] = argv[argpos]; 2350 mput(uargc, uargv); 2351 if ((code / 100) != COMPLETE) { 2352 rval = argpos + 1; 2353 break; 2354 } 2355 } 2356 } 2357 2358 cleanup_auto_put: 2359 free(path); 2360 FREEPTR(uargv[2]); 2361 return (rval); 2362 } 2363