1 /* $NetBSD: fetch.c,v 1.226 2016/12/15 04:49:15 nonaka 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 1.226 2016/12/15 04:49:15 nonaka 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 #define C_RESTART 3 859 860 static int 861 getresponseline(FETCH *fin, char *buf, size_t buflen, int *len) 862 { 863 const char *errormsg; 864 865 alarmtimer(quit_time ? quit_time : 60); 866 *len = fetch_getline(fin, buf, buflen, &errormsg); 867 alarmtimer(0); 868 if (*len < 0) { 869 if (*errormsg == '\n') 870 errormsg++; 871 warnx("Receiving HTTP reply: %s", errormsg); 872 return C_CLEANUP; 873 } 874 while (*len > 0 && (ISLWS(buf[*len-1]))) 875 buf[--*len] = '\0'; 876 877 if (*len) 878 DPRINTF("%s: received `%s'\n", __func__, buf); 879 return C_OK; 880 } 881 882 static int 883 getresponse(FETCH *fin, char **cp, size_t buflen, int *hcode) 884 { 885 int len, rv; 886 char *ep, *buf = *cp; 887 888 *hcode = 0; 889 if ((rv = getresponseline(fin, buf, buflen, &len)) != C_OK) 890 return rv; 891 892 /* Determine HTTP response code */ 893 *cp = strchr(buf, ' '); 894 if (*cp == NULL) 895 return C_IMPROPER; 896 897 (*cp)++; 898 899 *hcode = strtol(*cp, &ep, 10); 900 if (*ep != '\0' && !isspace((unsigned char)*ep)) 901 return C_IMPROPER; 902 903 return C_OK; 904 } 905 906 static int 907 parse_posinfo(const char **cp, struct posinfo *pi) 908 { 909 char *ep; 910 if (!match_token(cp, "bytes")) 911 return -1; 912 913 if (**cp == '*') 914 (*cp)++; 915 else { 916 pi->rangestart = STRTOLL(*cp, &ep, 10); 917 if (pi->rangestart < 0 || *ep != '-') 918 return -1; 919 *cp = ep + 1; 920 pi->rangeend = STRTOLL(*cp, &ep, 10); 921 if (pi->rangeend < 0 || pi->rangeend < pi->rangestart) 922 return -1; 923 *cp = ep; 924 } 925 if (**cp != '/') 926 return -1; 927 (*cp)++; 928 if (**cp == '*') 929 (*cp)++; 930 else { 931 pi->entitylen = STRTOLL(*cp, &ep, 10); 932 if (pi->entitylen < 0) 933 return -1; 934 *cp = ep; 935 } 936 if (**cp != '\0') 937 return -1; 938 939 #ifndef NO_DEBUG 940 if (ftp_debug) { 941 fprintf(ttyout, "parsed range as: "); 942 if (pi->rangestart == -1) 943 fprintf(ttyout, "*"); 944 else 945 fprintf(ttyout, LLF "-" LLF, (LLT)pi->rangestart, 946 (LLT)pi->rangeend); 947 fprintf(ttyout, "/" LLF "\n", (LLT)pi->entitylen); 948 } 949 #endif 950 return 0; 951 } 952 953 static int 954 negotiate_connection(FETCH *fin, const char *url, const char *penv, 955 struct posinfo *pi, time_t *mtime, struct authinfo *wauth, 956 struct authinfo *pauth, volatile int *rval, volatile int *ischunked, 957 char **auth) 958 { 959 int len, hcode, rv; 960 char buf[FTPBUFLEN], *ep; 961 const char *cp, *token; 962 char *location, *message; 963 964 *auth = message = location = NULL; 965 966 /* Read the response */ 967 ep = buf; 968 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 969 case C_CLEANUP: 970 goto cleanup_fetch_url; 971 case C_IMPROPER: 972 goto improper; 973 case C_OK: 974 message = ftp_strdup(ep); 975 break; 976 } 977 978 /* Read the rest of the header. */ 979 980 for (;;) { 981 if ((rv = getresponseline(fin, buf, sizeof(buf), &len)) != C_OK) 982 goto cleanup_fetch_url; 983 if (len == 0) 984 break; 985 986 /* 987 * Look for some headers 988 */ 989 990 cp = buf; 991 992 if (match_token(&cp, "Content-Length:")) { 993 filesize = STRTOLL(cp, &ep, 10); 994 if (filesize < 0 || *ep != '\0') 995 goto improper; 996 DPRINTF("%s: parsed len as: " LLF "\n", 997 __func__, (LLT)filesize); 998 999 } else if (match_token(&cp, "Content-Range:")) { 1000 if (parse_posinfo(&cp, pi) == -1) 1001 goto improper; 1002 if (! restart_point) { 1003 warnx( 1004 "Received unexpected Content-Range header"); 1005 goto cleanup_fetch_url; 1006 } 1007 1008 } else if (match_token(&cp, "Last-Modified:")) { 1009 getmtime(cp, mtime); 1010 1011 } else if (match_token(&cp, "Location:")) { 1012 location = ftp_strdup(cp); 1013 DPRINTF("%s: parsed location as `%s'\n", 1014 __func__, cp); 1015 1016 } else if (match_token(&cp, "Transfer-Encoding:")) { 1017 if (match_token(&cp, "binary")) { 1018 warnx( 1019 "Bogus transfer encoding `binary' (fetching anyway)"); 1020 continue; 1021 } 1022 if (! (token = match_token(&cp, "chunked"))) { 1023 warnx( 1024 "Unsupported transfer encoding `%s'", 1025 token); 1026 goto cleanup_fetch_url; 1027 } 1028 (*ischunked)++; 1029 DPRINTF("%s: using chunked encoding\n", 1030 __func__); 1031 1032 } else if (match_token(&cp, "Proxy-Authenticate:") 1033 || match_token(&cp, "WWW-Authenticate:")) { 1034 if (! (token = match_token(&cp, "Basic"))) { 1035 DPRINTF("%s: skipping unknown auth " 1036 "scheme `%s'\n", __func__, token); 1037 continue; 1038 } 1039 FREEPTR(*auth); 1040 *auth = ftp_strdup(token); 1041 DPRINTF("%s: parsed auth as `%s'\n", 1042 __func__, cp); 1043 } 1044 1045 } 1046 /* finished parsing header */ 1047 1048 switch (hcode) { 1049 case 200: 1050 break; 1051 case 206: 1052 if (! restart_point) { 1053 warnx("Not expecting partial content header"); 1054 goto cleanup_fetch_url; 1055 } 1056 break; 1057 case 300: 1058 case 301: 1059 case 302: 1060 case 303: 1061 case 305: 1062 case 307: 1063 if (EMPTYSTRING(location)) { 1064 warnx( 1065 "No redirection Location provided by server"); 1066 goto cleanup_fetch_url; 1067 } 1068 if (redirect_loop++ > 5) { 1069 warnx("Too many redirections requested"); 1070 goto cleanup_fetch_url; 1071 } 1072 if (hcode == 305) { 1073 if (verbose) 1074 fprintf(ttyout, "Redirected via %s\n", 1075 location); 1076 *rval = fetch_url(url, location, 1077 pauth->auth, wauth->auth); 1078 } else { 1079 if (verbose) 1080 fprintf(ttyout, "Redirected to %s\n", 1081 location); 1082 *rval = go_fetch(location); 1083 } 1084 goto cleanup_fetch_url; 1085 #ifndef NO_AUTH 1086 case 401: 1087 case 407: 1088 { 1089 struct authinfo aauth; 1090 char **authp; 1091 1092 if (hcode == 401) 1093 aauth = *wauth; 1094 else 1095 aauth = *pauth; 1096 1097 if (verbose || aauth.auth == NULL || 1098 aauth.user == NULL || aauth.pass == NULL) 1099 fprintf(ttyout, "%s\n", message); 1100 if (EMPTYSTRING(*auth)) { 1101 warnx( 1102 "No authentication challenge provided by server"); 1103 goto cleanup_fetch_url; 1104 } 1105 1106 if (aauth.auth != NULL) { 1107 char reply[10]; 1108 1109 fprintf(ttyout, 1110 "Authorization failed. Retry (y/n)? "); 1111 if (get_line(stdin, reply, sizeof(reply), NULL) 1112 < 0) { 1113 goto cleanup_fetch_url; 1114 } 1115 if (tolower((unsigned char)reply[0]) != 'y') 1116 goto cleanup_fetch_url; 1117 aauth.user = NULL; 1118 aauth.pass = NULL; 1119 } 1120 1121 authp = &aauth.auth; 1122 if (auth_url(*auth, authp, &aauth) == 0) { 1123 *rval = fetch_url(url, penv, 1124 hcode == 401 ? pauth->auth : aauth.auth, 1125 hcode == 401 ? aauth.auth : wauth->auth); 1126 memset(*authp, 0, strlen(*authp)); 1127 FREEPTR(*authp); 1128 } 1129 goto cleanup_fetch_url; 1130 } 1131 #endif 1132 default: 1133 if (message) 1134 warnx("Error retrieving file `%s'", message); 1135 else 1136 warnx("Unknown error retrieving file"); 1137 goto cleanup_fetch_url; 1138 } 1139 rv = C_OK; 1140 goto out; 1141 1142 cleanup_fetch_url: 1143 rv = C_CLEANUP; 1144 goto out; 1145 improper: 1146 rv = C_IMPROPER; 1147 goto out; 1148 out: 1149 FREEPTR(message); 1150 FREEPTR(location); 1151 return rv; 1152 } /* end of ftp:// or http:// specific setup */ 1153 1154 #ifdef WITH_SSL 1155 static int 1156 connectmethod(int s, FETCH *fin, struct urlinfo *oui, struct urlinfo *ui, 1157 struct authinfo *pauth, char **auth, int *hasleading) 1158 { 1159 void *ssl; 1160 int hcode, rv; 1161 const char *cp; 1162 char buf[FTPBUFLEN], *ep; 1163 char *message = NULL; 1164 1165 print_connect(fin, oui); 1166 1167 print_agent(fin); 1168 *hasleading = print_proxy(fin, *hasleading, NULL, pauth->auth); 1169 1170 if (verbose && *hasleading) 1171 fputs(")\n", ttyout); 1172 *hasleading = 0; 1173 1174 fetch_printf(fin, "\r\n"); 1175 if (fetch_flush(fin) == EOF) { 1176 warn("Writing HTTP request"); 1177 alarmtimer(0); 1178 goto cleanup_fetch_url; 1179 } 1180 alarmtimer(0); 1181 1182 /* Read the response */ 1183 ep = buf; 1184 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1185 case C_CLEANUP: 1186 goto cleanup_fetch_url; 1187 case C_IMPROPER: 1188 goto improper; 1189 case C_OK: 1190 message = ftp_strdup(ep); 1191 break; 1192 } 1193 1194 for (;;) { 1195 int len; 1196 if (getresponseline(fin, buf, sizeof(buf), &len) != C_OK) 1197 goto cleanup_fetch_url; 1198 if (len == 0) 1199 break; 1200 1201 cp = buf; 1202 if (match_token(&cp, "Proxy-Authenticate:")) { 1203 const char *token; 1204 if (!(token = match_token(&cp, "Basic"))) { 1205 DPRINTF( 1206 "%s: skipping unknown auth scheme `%s'\n", 1207 __func__, token); 1208 continue; 1209 } 1210 FREEPTR(*auth); 1211 *auth = ftp_strdup(token); 1212 DPRINTF("%s: parsed auth as " "`%s'\n", __func__, cp); 1213 } 1214 } 1215 1216 /* finished parsing header */ 1217 switch (hcode) { 1218 case 200: 1219 break; 1220 #ifndef NO_AUTH 1221 case 407: 1222 if (verbose || pauth->auth == NULL || 1223 pauth->user == NULL || pauth->pass == NULL) 1224 fprintf(ttyout, "%s\n", message); 1225 if (EMPTYSTRING(*auth)) { 1226 warnx("No authentication challenge provided by server"); 1227 goto cleanup_fetch_url; 1228 } 1229 1230 if (pauth->auth != NULL) { 1231 char reply[10]; 1232 1233 fprintf(ttyout, "Authorization failed. Retry (y/n)? "); 1234 if (get_line(stdin, reply, sizeof(reply), NULL) 1235 < 0) { 1236 goto cleanup_fetch_url; 1237 } 1238 if (tolower((unsigned char)reply[0]) != 'y') 1239 goto cleanup_fetch_url; 1240 pauth->user = NULL; 1241 pauth->pass = NULL; 1242 } 1243 1244 if (auth_url(*auth, &pauth->auth, pauth) == 0) 1245 goto restart_fetch_url; 1246 goto cleanup_fetch_url; 1247 #endif 1248 default: 1249 if (message) 1250 warnx("Error proxy connect " "`%s'", message); 1251 else 1252 warnx("Unknown error proxy " "connect"); 1253 goto cleanup_fetch_url; 1254 } 1255 1256 if ((ssl = fetch_start_ssl(s, oui->host)) == NULL) 1257 goto cleanup_fetch_url; 1258 fetch_set_ssl(fin, ssl); 1259 1260 rv = C_OK; 1261 goto out; 1262 improper: 1263 rv = C_IMPROPER; 1264 goto out; 1265 cleanup_fetch_url: 1266 rv = C_CLEANUP; 1267 goto out; 1268 restart_fetch_url: 1269 rv = C_RESTART; 1270 goto out; 1271 out: 1272 FREEPTR(message); 1273 return rv; 1274 } 1275 #endif 1276 1277 /* 1278 * Retrieve URL, via a proxy if necessary, using HTTP. 1279 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 1280 * http_proxy/https_proxy as appropriate. 1281 * Supports HTTP redirects. 1282 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1283 * is still open (e.g, ftp xfer with trailing /) 1284 */ 1285 static int 1286 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 1287 { 1288 sigfunc volatile oldint; 1289 sigfunc volatile oldpipe; 1290 sigfunc volatile oldalrm; 1291 sigfunc volatile oldquit; 1292 int volatile s; 1293 struct stat sb; 1294 int volatile isproxy; 1295 int volatile rval, ischunked; 1296 size_t flen; 1297 static size_t bufsize; 1298 static char *xferbuf; 1299 const char *cp; 1300 char *ep; 1301 char *auth; 1302 char *volatile savefile; 1303 char *volatile location; 1304 char *volatile message; 1305 char *volatile decodedpath; 1306 struct authinfo wauth, pauth; 1307 struct posinfo pi; 1308 off_t hashbytes; 1309 int (*volatile closefunc)(FILE *); 1310 FETCH *volatile fin; 1311 FILE *volatile fout; 1312 const char *volatile penv = proxyenv; 1313 struct urlinfo ui, oui; 1314 time_t mtime; 1315 void *ssl = NULL; 1316 1317 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 1318 1319 oldquit = oldalrm = oldint = oldpipe = NULL; 1320 closefunc = NULL; 1321 fin = NULL; 1322 fout = NULL; 1323 s = -1; 1324 savefile = NULL; 1325 auth = location = message = NULL; 1326 ischunked = isproxy = 0; 1327 rval = 1; 1328 1329 initurlinfo(&ui); 1330 initurlinfo(&oui); 1331 initauthinfo(&wauth, wwwauth); 1332 initauthinfo(&pauth, proxyauth); 1333 1334 decodedpath = NULL; 1335 1336 if (sigsetjmp(httpabort, 1)) 1337 goto cleanup_fetch_url; 1338 1339 if (parse_url(url, "URL", &ui, &wauth) == -1) 1340 goto cleanup_fetch_url; 1341 1342 copyurlinfo(&oui, &ui); 1343 1344 if (ui.utype == FILE_URL_T && ! EMPTYSTRING(ui.host) 1345 && strcasecmp(ui.host, "localhost") != 0) { 1346 warnx("No support for non local file URL `%s'", url); 1347 goto cleanup_fetch_url; 1348 } 1349 1350 if (EMPTYSTRING(ui.path)) { 1351 if (ui.utype == FTP_URL_T) { 1352 rval = fetch_ftp(url); 1353 goto cleanup_fetch_url; 1354 } 1355 if (!IS_HTTP_TYPE(ui.utype) || outfile == NULL) { 1356 warnx("Invalid URL (no file after host) `%s'", url); 1357 goto cleanup_fetch_url; 1358 } 1359 } 1360 1361 decodedpath = ftp_strdup(ui.path); 1362 url_decode(decodedpath); 1363 1364 if (outfile) 1365 savefile = outfile; 1366 else { 1367 cp = strrchr(decodedpath, '/'); /* find savefile */ 1368 if (cp != NULL) 1369 savefile = ftp_strdup(cp + 1); 1370 else 1371 savefile = ftp_strdup(decodedpath); 1372 } 1373 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 1374 if (EMPTYSTRING(savefile)) { 1375 if (ui.utype == FTP_URL_T) { 1376 rval = fetch_ftp(url); 1377 goto cleanup_fetch_url; 1378 } 1379 warnx("No file after directory (you must specify an " 1380 "output file) `%s'", url); 1381 goto cleanup_fetch_url; 1382 } 1383 1384 restart_point = 0; 1385 filesize = -1; 1386 initposinfo(&pi); 1387 mtime = -1; 1388 if (restartautofetch) { 1389 if (stat(savefile, &sb) == 0) 1390 restart_point = sb.st_size; 1391 } 1392 if (ui.utype == FILE_URL_T) { /* file:// URLs */ 1393 direction = "copied"; 1394 fin = fetch_open(decodedpath, "r"); 1395 if (fin == NULL) { 1396 warn("Can't open `%s'", decodedpath); 1397 goto cleanup_fetch_url; 1398 } 1399 if (fstat(fetch_fileno(fin), &sb) == 0) { 1400 mtime = sb.st_mtime; 1401 filesize = sb.st_size; 1402 } 1403 if (restart_point) { 1404 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 1405 warn("Can't seek to restart `%s'", 1406 decodedpath); 1407 goto cleanup_fetch_url; 1408 } 1409 } 1410 if (verbose) { 1411 fprintf(ttyout, "Copying %s", decodedpath); 1412 if (restart_point) 1413 fprintf(ttyout, " (restarting at " LLF ")", 1414 (LLT)restart_point); 1415 fputs("\n", ttyout); 1416 } 1417 if (0 == rcvbuf_size) { 1418 rcvbuf_size = 8 * 1024; /* XXX */ 1419 } 1420 } else { /* ftp:// or http:// URLs */ 1421 int hasleading; 1422 1423 if (penv == NULL) { 1424 #ifdef WITH_SSL 1425 if (ui.utype == HTTPS_URL_T) 1426 penv = getoptionvalue("https_proxy"); 1427 #endif 1428 if (penv == NULL && IS_HTTP_TYPE(ui.utype)) 1429 penv = getoptionvalue("http_proxy"); 1430 else if (ui.utype == FTP_URL_T) 1431 penv = getoptionvalue("ftp_proxy"); 1432 } 1433 direction = "retrieved"; 1434 if (! EMPTYSTRING(penv)) { /* use proxy */ 1435 1436 isproxy = handle_noproxy(ui.host, ui.portnum); 1437 1438 if (isproxy == 0 && ui.utype == FTP_URL_T) { 1439 rval = fetch_ftp(url); 1440 goto cleanup_fetch_url; 1441 } 1442 1443 if (isproxy) { 1444 if (restart_point) { 1445 warnx( 1446 "Can't restart via proxy URL `%s'", 1447 penv); 1448 goto cleanup_fetch_url; 1449 } 1450 if (handle_proxy(url, penv, &ui, &pauth) < 0) 1451 goto cleanup_fetch_url; 1452 } 1453 } /* ! EMPTYSTRING(penv) */ 1454 1455 s = ftp_socket(&ui, &ssl); 1456 if (s < 0) { 1457 warnx("Can't connect to `%s:%s'", ui.host, ui.port); 1458 goto cleanup_fetch_url; 1459 } 1460 1461 oldalrm = xsignal(SIGALRM, timeouthttp); 1462 alarmtimer(quit_time ? quit_time : 60); 1463 fin = fetch_fdopen(s, "r+"); 1464 fetch_set_ssl(fin, ssl); 1465 alarmtimer(0); 1466 1467 alarmtimer(quit_time ? quit_time : 60); 1468 /* 1469 * Construct and send the request. 1470 */ 1471 if (verbose) 1472 fprintf(ttyout, "Requesting %s\n", url); 1473 1474 hasleading = 0; 1475 #ifdef WITH_SSL 1476 if (isproxy && oui.utype == HTTPS_URL_T) { 1477 switch (connectmethod(s, fin, &oui, &ui, &pauth, &auth, 1478 &hasleading)) { 1479 case C_RESTART: 1480 rval = fetch_url(url, penv, pauth.auth, 1481 wauth.auth); 1482 /*FALLTHROUGH*/ 1483 case C_CLEANUP: 1484 goto cleanup_fetch_url; 1485 case C_IMPROPER: 1486 goto improper; 1487 case C_OK: 1488 break; 1489 default: 1490 abort(); 1491 } 1492 } 1493 #endif 1494 1495 hasleading = print_get(fin, hasleading, isproxy, &oui, &ui); 1496 1497 if (flushcache) 1498 print_cache(fin, isproxy); 1499 1500 print_agent(fin); 1501 hasleading = print_proxy(fin, hasleading, wauth.auth, 1502 auth ? NULL : pauth.auth); 1503 if (hasleading) { 1504 hasleading = 0; 1505 if (verbose) 1506 fputs(")\n", ttyout); 1507 } 1508 1509 fetch_printf(fin, "\r\n"); 1510 if (fetch_flush(fin) == EOF) { 1511 warn("Writing HTTP request"); 1512 alarmtimer(0); 1513 goto cleanup_fetch_url; 1514 } 1515 alarmtimer(0); 1516 1517 switch (negotiate_connection(fin, url, penv, &pi, 1518 &mtime, &wauth, &pauth, &rval, &ischunked, &auth)) { 1519 case C_OK: 1520 break; 1521 case C_CLEANUP: 1522 goto cleanup_fetch_url; 1523 case C_IMPROPER: 1524 goto improper; 1525 default: 1526 abort(); 1527 } 1528 } 1529 1530 /* Open the output file. */ 1531 1532 /* 1533 * Only trust filenames with special meaning if they came from 1534 * the command line 1535 */ 1536 if (outfile == savefile) { 1537 if (strcmp(savefile, "-") == 0) { 1538 fout = stdout; 1539 } else if (*savefile == '|') { 1540 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1541 fout = popen(savefile + 1, "w"); 1542 if (fout == NULL) { 1543 warn("Can't execute `%s'", savefile + 1); 1544 goto cleanup_fetch_url; 1545 } 1546 closefunc = pclose; 1547 } 1548 } 1549 if (fout == NULL) { 1550 if ((pi.rangeend != -1 && pi.rangeend <= restart_point) || 1551 (pi.rangestart == -1 && 1552 filesize != -1 && filesize <= restart_point)) { 1553 /* already done */ 1554 if (verbose) 1555 fprintf(ttyout, "already done\n"); 1556 rval = 0; 1557 goto cleanup_fetch_url; 1558 } 1559 if (restart_point && pi.rangestart != -1) { 1560 if (pi.entitylen != -1) 1561 filesize = pi.entitylen; 1562 if (pi.rangestart != restart_point) { 1563 warnx( 1564 "Size of `%s' differs from save file `%s'", 1565 url, savefile); 1566 goto cleanup_fetch_url; 1567 } 1568 fout = fopen(savefile, "a"); 1569 } else 1570 fout = fopen(savefile, "w"); 1571 if (fout == NULL) { 1572 warn("Can't open `%s'", savefile); 1573 goto cleanup_fetch_url; 1574 } 1575 closefunc = fclose; 1576 } 1577 1578 /* Trap signals */ 1579 oldquit = xsignal(SIGQUIT, psummary); 1580 oldint = xsignal(SIGINT, aborthttp); 1581 1582 assert(rcvbuf_size > 0); 1583 if ((size_t)rcvbuf_size > bufsize) { 1584 if (xferbuf) 1585 (void)free(xferbuf); 1586 bufsize = rcvbuf_size; 1587 xferbuf = ftp_malloc(bufsize); 1588 } 1589 1590 bytes = 0; 1591 hashbytes = mark; 1592 if (oldalrm) { 1593 (void)xsignal(SIGALRM, oldalrm); 1594 oldalrm = NULL; 1595 } 1596 progressmeter(-1); 1597 1598 /* Finally, suck down the file. */ 1599 do { 1600 long chunksize; 1601 short lastchunk; 1602 1603 chunksize = 0; 1604 lastchunk = 0; 1605 /* read chunk-size */ 1606 if (ischunked) { 1607 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1608 warnx("Unexpected EOF reading chunk-size"); 1609 goto cleanup_fetch_url; 1610 } 1611 errno = 0; 1612 chunksize = strtol(xferbuf, &ep, 16); 1613 if (ep == xferbuf) { 1614 warnx("Invalid chunk-size"); 1615 goto cleanup_fetch_url; 1616 } 1617 if (errno == ERANGE || chunksize < 0) { 1618 errno = ERANGE; 1619 warn("Chunk-size `%.*s'", 1620 (int)(ep-xferbuf), xferbuf); 1621 goto cleanup_fetch_url; 1622 } 1623 1624 /* 1625 * XXX: Work around bug in Apache 1.3.9 and 1626 * 1.3.11, which incorrectly put trailing 1627 * space after the chunk-size. 1628 */ 1629 while (*ep == ' ') 1630 ep++; 1631 1632 /* skip [ chunk-ext ] */ 1633 if (*ep == ';') { 1634 while (*ep && *ep != '\r') 1635 ep++; 1636 } 1637 1638 if (strcmp(ep, "\r\n") != 0) { 1639 warnx("Unexpected data following chunk-size"); 1640 goto cleanup_fetch_url; 1641 } 1642 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1643 (LLT)chunksize); 1644 if (chunksize == 0) { 1645 lastchunk = 1; 1646 goto chunkdone; 1647 } 1648 } 1649 /* transfer file or chunk */ 1650 while (1) { 1651 struct timeval then, now, td; 1652 volatile off_t bufrem; 1653 1654 if (rate_get) 1655 (void)gettimeofday(&then, NULL); 1656 bufrem = rate_get ? rate_get : (off_t)bufsize; 1657 if (ischunked) 1658 bufrem = MIN(chunksize, bufrem); 1659 while (bufrem > 0) { 1660 flen = fetch_read(xferbuf, sizeof(char), 1661 MIN((off_t)bufsize, bufrem), fin); 1662 if (flen <= 0) 1663 goto chunkdone; 1664 bytes += flen; 1665 bufrem -= flen; 1666 if (fwrite(xferbuf, sizeof(char), flen, fout) 1667 != flen) { 1668 warn("Writing `%s'", savefile); 1669 goto cleanup_fetch_url; 1670 } 1671 if (hash && !progress) { 1672 while (bytes >= hashbytes) { 1673 (void)putc('#', ttyout); 1674 hashbytes += mark; 1675 } 1676 (void)fflush(ttyout); 1677 } 1678 if (ischunked) { 1679 chunksize -= flen; 1680 if (chunksize <= 0) 1681 break; 1682 } 1683 } 1684 if (rate_get) { 1685 while (1) { 1686 (void)gettimeofday(&now, NULL); 1687 timersub(&now, &then, &td); 1688 if (td.tv_sec > 0) 1689 break; 1690 usleep(1000000 - td.tv_usec); 1691 } 1692 } 1693 if (ischunked && chunksize <= 0) 1694 break; 1695 } 1696 /* read CRLF after chunk*/ 1697 chunkdone: 1698 if (ischunked) { 1699 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1700 alarmtimer(0); 1701 warnx("Unexpected EOF reading chunk CRLF"); 1702 goto cleanup_fetch_url; 1703 } 1704 if (strcmp(xferbuf, "\r\n") != 0) { 1705 warnx("Unexpected data following chunk"); 1706 goto cleanup_fetch_url; 1707 } 1708 if (lastchunk) 1709 break; 1710 } 1711 } while (ischunked); 1712 1713 /* XXX: deal with optional trailer & CRLF here? */ 1714 1715 if (hash && !progress && bytes > 0) { 1716 if (bytes < mark) 1717 (void)putc('#', ttyout); 1718 (void)putc('\n', ttyout); 1719 } 1720 if (fetch_error(fin)) { 1721 warn("Reading file"); 1722 goto cleanup_fetch_url; 1723 } 1724 progressmeter(1); 1725 (void)fflush(fout); 1726 if (closefunc == fclose && mtime != -1) { 1727 struct timeval tval[2]; 1728 1729 (void)gettimeofday(&tval[0], NULL); 1730 tval[1].tv_sec = mtime; 1731 tval[1].tv_usec = 0; 1732 (*closefunc)(fout); 1733 fout = NULL; 1734 1735 if (utimes(savefile, tval) == -1) { 1736 fprintf(ttyout, 1737 "Can't change modification time to %s", 1738 rfc2822time(localtime(&mtime))); 1739 } 1740 } 1741 if (bytes > 0) 1742 ptransfer(0); 1743 bytes = 0; 1744 1745 rval = 0; 1746 goto cleanup_fetch_url; 1747 1748 improper: 1749 warnx("Improper response from `%s:%s'", ui.host, ui.port); 1750 1751 cleanup_fetch_url: 1752 if (oldint) 1753 (void)xsignal(SIGINT, oldint); 1754 if (oldpipe) 1755 (void)xsignal(SIGPIPE, oldpipe); 1756 if (oldalrm) 1757 (void)xsignal(SIGALRM, oldalrm); 1758 if (oldquit) 1759 (void)xsignal(SIGQUIT, oldpipe); 1760 if (fin != NULL) 1761 fetch_close(fin); 1762 else if (s != -1) 1763 close(s); 1764 if (closefunc != NULL && fout != NULL) 1765 (*closefunc)(fout); 1766 if (savefile != outfile) 1767 FREEPTR(savefile); 1768 freeurlinfo(&ui); 1769 freeurlinfo(&oui); 1770 freeauthinfo(&wauth); 1771 freeauthinfo(&pauth); 1772 FREEPTR(decodedpath); 1773 FREEPTR(auth); 1774 FREEPTR(location); 1775 FREEPTR(message); 1776 return (rval); 1777 } 1778 1779 /* 1780 * Abort a HTTP retrieval 1781 */ 1782 static void 1783 aborthttp(int notused) 1784 { 1785 char msgbuf[100]; 1786 int len; 1787 1788 sigint_raised = 1; 1789 alarmtimer(0); 1790 if (fromatty) { 1791 len = snprintf(msgbuf, sizeof(msgbuf), 1792 "\n%s: HTTP fetch aborted.\n", getprogname()); 1793 if (len > 0) 1794 write(fileno(ttyout), msgbuf, len); 1795 } 1796 siglongjmp(httpabort, 1); 1797 } 1798 1799 static void 1800 timeouthttp(int notused) 1801 { 1802 char msgbuf[100]; 1803 int len; 1804 1805 alarmtimer(0); 1806 if (fromatty) { 1807 len = snprintf(msgbuf, sizeof(msgbuf), 1808 "\n%s: HTTP fetch timeout.\n", getprogname()); 1809 if (len > 0) 1810 write(fileno(ttyout), msgbuf, len); 1811 } 1812 siglongjmp(httpabort, 1); 1813 } 1814 1815 /* 1816 * Retrieve ftp URL or classic ftp argument using FTP. 1817 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1818 * is still open (e.g, ftp xfer with trailing /) 1819 */ 1820 static int 1821 fetch_ftp(const char *url) 1822 { 1823 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1824 char *dir, *file; 1825 char cmdbuf[MAXPATHLEN]; 1826 char dirbuf[4]; 1827 int dirhasglob, filehasglob, rval, transtype, xargc; 1828 int oanonftp, oautologin; 1829 struct authinfo auth; 1830 struct urlinfo ui; 1831 1832 DPRINTF("fetch_ftp: `%s'\n", url); 1833 dir = file = NULL; 1834 rval = 1; 1835 transtype = TYPE_I; 1836 1837 initurlinfo(&ui); 1838 initauthinfo(&auth, NULL); 1839 1840 if (STRNEQUAL(url, FTP_URL)) { 1841 if ((parse_url(url, "URL", &ui, &auth) == -1) || 1842 (auth.user != NULL && *auth.user == '\0') || 1843 EMPTYSTRING(ui.host)) { 1844 warnx("Invalid URL `%s'", url); 1845 goto cleanup_fetch_ftp; 1846 } 1847 /* 1848 * Note: Don't url_decode(path) here. We need to keep the 1849 * distinction between "/" and "%2F" until later. 1850 */ 1851 1852 /* check for trailing ';type=[aid]' */ 1853 if (! EMPTYSTRING(ui.path) && (cp = strrchr(ui.path, ';')) != NULL) { 1854 if (strcasecmp(cp, ";type=a") == 0) 1855 transtype = TYPE_A; 1856 else if (strcasecmp(cp, ";type=i") == 0) 1857 transtype = TYPE_I; 1858 else if (strcasecmp(cp, ";type=d") == 0) { 1859 warnx( 1860 "Directory listing via a URL is not supported"); 1861 goto cleanup_fetch_ftp; 1862 } else { 1863 warnx("Invalid suffix `%s' in URL `%s'", cp, 1864 url); 1865 goto cleanup_fetch_ftp; 1866 } 1867 *cp = 0; 1868 } 1869 } else { /* classic style `[user@]host:[file]' */ 1870 ui.utype = CLASSIC_URL_T; 1871 ui.host = ftp_strdup(url); 1872 cp = strchr(ui.host, '@'); 1873 if (cp != NULL) { 1874 *cp = '\0'; 1875 auth.user = ui.host; 1876 anonftp = 0; /* disable anonftp */ 1877 ui.host = ftp_strdup(cp + 1); 1878 } 1879 cp = strchr(ui.host, ':'); 1880 if (cp != NULL) { 1881 *cp = '\0'; 1882 ui.path = ftp_strdup(cp + 1); 1883 } 1884 } 1885 if (EMPTYSTRING(ui.host)) 1886 goto cleanup_fetch_ftp; 1887 1888 /* Extract the file and (if present) directory name. */ 1889 dir = ui.path; 1890 if (! EMPTYSTRING(dir)) { 1891 /* 1892 * If we are dealing with classic `[user@]host:[path]' syntax, 1893 * then a path of the form `/file' (resulting from input of the 1894 * form `host:/file') means that we should do "CWD /" before 1895 * retrieving the file. So we set dir="/" and file="file". 1896 * 1897 * But if we are dealing with URLs like `ftp://host/path' then 1898 * a path of the form `/file' (resulting from a URL of the form 1899 * `ftp://host//file') means that we should do `CWD ' (with an 1900 * empty argument) before retrieving the file. So we set 1901 * dir="" and file="file". 1902 * 1903 * If the path does not contain / at all, we set dir=NULL. 1904 * (We get a path without any slashes if we are dealing with 1905 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1906 * 1907 * In all other cases, we set dir to a string that does not 1908 * include the final '/' that separates the dir part from the 1909 * file part of the path. (This will be the empty string if 1910 * and only if we are dealing with a path of the form `/file' 1911 * resulting from an URL of the form `ftp://host//file'.) 1912 */ 1913 cp = strrchr(dir, '/'); 1914 if (cp == dir && ui.utype == CLASSIC_URL_T) { 1915 file = cp + 1; 1916 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1917 dir = dirbuf; 1918 } else if (cp != NULL) { 1919 *cp++ = '\0'; 1920 file = cp; 1921 } else { 1922 file = dir; 1923 dir = NULL; 1924 } 1925 } else 1926 dir = NULL; 1927 if (ui.utype == FTP_URL_T && file != NULL) { 1928 url_decode(file); 1929 /* but still don't url_decode(dir) */ 1930 } 1931 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1932 "path `%s' dir `%s' file `%s'\n", 1933 STRorNULL(auth.user), STRorNULL(auth.pass), 1934 STRorNULL(ui.host), STRorNULL(ui.port), 1935 STRorNULL(ui.path), STRorNULL(dir), STRorNULL(file)); 1936 1937 dirhasglob = filehasglob = 0; 1938 if (doglob && 1939 (ui.utype == CLASSIC_URL_T || ui.utype == FTP_URL_T)) { 1940 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1941 dirhasglob = 1; 1942 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1943 filehasglob = 1; 1944 } 1945 1946 /* Set up the connection */ 1947 oanonftp = anonftp; 1948 if (connected) 1949 disconnect(0, NULL); 1950 anonftp = oanonftp; 1951 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1952 xargv[0] = cmdbuf; 1953 xargv[1] = ui.host; 1954 xargv[2] = NULL; 1955 xargc = 2; 1956 if (ui.port) { 1957 xargv[2] = ui.port; 1958 xargv[3] = NULL; 1959 xargc = 3; 1960 } 1961 oautologin = autologin; 1962 /* don't autologin in setpeer(), use ftp_login() below */ 1963 autologin = 0; 1964 setpeer(xargc, xargv); 1965 autologin = oautologin; 1966 if ((connected == 0) || 1967 (connected == 1 && !ftp_login(ui.host, auth.user, auth.pass))) { 1968 warnx("Can't connect or login to host `%s:%s'", 1969 ui.host, ui.port ? ui.port : "?"); 1970 goto cleanup_fetch_ftp; 1971 } 1972 1973 switch (transtype) { 1974 case TYPE_A: 1975 setascii(1, xargv); 1976 break; 1977 case TYPE_I: 1978 setbinary(1, xargv); 1979 break; 1980 default: 1981 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1982 } 1983 1984 /* 1985 * Change directories, if necessary. 1986 * 1987 * Note: don't use EMPTYSTRING(dir) below, because 1988 * dir=="" means something different from dir==NULL. 1989 */ 1990 if (dir != NULL && !dirhasglob) { 1991 char *nextpart; 1992 1993 /* 1994 * If we are dealing with a classic `[user@]host:[path]' 1995 * (urltype is CLASSIC_URL_T) then we have a raw directory 1996 * name (not encoded in any way) and we can change 1997 * directories in one step. 1998 * 1999 * If we are dealing with an `ftp://host/path' URL 2000 * (urltype is FTP_URL_T), then RFC 3986 says we need to 2001 * send a separate CWD command for each unescaped "/" 2002 * in the path, and we have to interpret %hex escaping 2003 * *after* we find the slashes. It's possible to get 2004 * empty components here, (from multiple adjacent 2005 * slashes in the path) and RFC 3986 says that we should 2006 * still do `CWD ' (with a null argument) in such cases. 2007 * 2008 * Many ftp servers don't support `CWD ', so if there's an 2009 * error performing that command, bail out with a descriptive 2010 * message. 2011 * 2012 * Examples: 2013 * 2014 * host: dir="", urltype=CLASSIC_URL_T 2015 * logged in (to default directory) 2016 * host:file dir=NULL, urltype=CLASSIC_URL_T 2017 * "RETR file" 2018 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 2019 * "CWD dir", logged in 2020 * ftp://host/ dir="", urltype=FTP_URL_T 2021 * logged in (to default directory) 2022 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 2023 * "CWD dir", logged in 2024 * ftp://host/file dir=NULL, urltype=FTP_URL_T 2025 * "RETR file" 2026 * ftp://host//file dir="", urltype=FTP_URL_T 2027 * "CWD ", "RETR file" 2028 * host:/file dir="/", urltype=CLASSIC_URL_T 2029 * "CWD /", "RETR file" 2030 * ftp://host///file dir="/", urltype=FTP_URL_T 2031 * "CWD ", "CWD ", "RETR file" 2032 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 2033 * "CWD /", "RETR file" 2034 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 2035 * "CWD foo", "RETR file" 2036 * ftp://host/foo/bar/file dir="foo/bar" 2037 * "CWD foo", "CWD bar", "RETR file" 2038 * ftp://host//foo/bar/file dir="/foo/bar" 2039 * "CWD ", "CWD foo", "CWD bar", "RETR file" 2040 * ftp://host/foo//bar/file dir="foo//bar" 2041 * "CWD foo", "CWD ", "CWD bar", "RETR file" 2042 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 2043 * "CWD /", "CWD foo", "CWD bar", "RETR file" 2044 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 2045 * "CWD /foo", "CWD bar", "RETR file" 2046 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 2047 * "CWD /foo/bar", "RETR file" 2048 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 2049 * "RETR /foo/bar/file" 2050 * 2051 * Note that we don't need `dir' after this point. 2052 */ 2053 do { 2054 if (ui.utype == FTP_URL_T) { 2055 nextpart = strchr(dir, '/'); 2056 if (nextpart) { 2057 *nextpart = '\0'; 2058 nextpart++; 2059 } 2060 url_decode(dir); 2061 } else 2062 nextpart = NULL; 2063 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 2064 STRorNULL(dir), STRorNULL(nextpart)); 2065 if (ui.utype == FTP_URL_T || *dir != '\0') { 2066 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 2067 xargv[0] = cmdbuf; 2068 xargv[1] = dir; 2069 xargv[2] = NULL; 2070 dirchange = 0; 2071 cd(2, xargv); 2072 if (! dirchange) { 2073 if (*dir == '\0' && code == 500) 2074 fprintf(stderr, 2075 "\n" 2076 "ftp: The `CWD ' command (without a directory), which is required by\n" 2077 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 2078 " conflicts with the server's conformance to RFC 959.\n" 2079 " Try the same URL without the `//' in the URL pathname.\n" 2080 "\n"); 2081 goto cleanup_fetch_ftp; 2082 } 2083 } 2084 dir = nextpart; 2085 } while (dir != NULL); 2086 } 2087 2088 if (EMPTYSTRING(file)) { 2089 rval = -1; 2090 goto cleanup_fetch_ftp; 2091 } 2092 2093 if (dirhasglob) { 2094 (void)strlcpy(rempath, dir, sizeof(rempath)); 2095 (void)strlcat(rempath, "/", sizeof(rempath)); 2096 (void)strlcat(rempath, file, sizeof(rempath)); 2097 file = rempath; 2098 } 2099 2100 /* Fetch the file(s). */ 2101 xargc = 2; 2102 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 2103 xargv[0] = cmdbuf; 2104 xargv[1] = file; 2105 xargv[2] = NULL; 2106 if (dirhasglob || filehasglob) { 2107 int ointeractive; 2108 2109 ointeractive = interactive; 2110 interactive = 0; 2111 if (restartautofetch) 2112 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 2113 else 2114 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 2115 xargv[0] = cmdbuf; 2116 mget(xargc, xargv); 2117 interactive = ointeractive; 2118 } else { 2119 if (outfile == NULL) { 2120 cp = strrchr(file, '/'); /* find savefile */ 2121 if (cp != NULL) 2122 outfile = cp + 1; 2123 else 2124 outfile = file; 2125 } 2126 xargv[2] = (char *)outfile; 2127 xargv[3] = NULL; 2128 xargc++; 2129 if (restartautofetch) 2130 reget(xargc, xargv); 2131 else 2132 get(xargc, xargv); 2133 } 2134 2135 if ((code / 100) == COMPLETE) 2136 rval = 0; 2137 2138 cleanup_fetch_ftp: 2139 freeurlinfo(&ui); 2140 freeauthinfo(&auth); 2141 return (rval); 2142 } 2143 2144 /* 2145 * Retrieve the given file to outfile. 2146 * Supports arguments of the form: 2147 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 2148 * call fetch_ftp() 2149 * "http://host/path" call fetch_url() to use HTTP 2150 * "file:///path" call fetch_url() to copy 2151 * "about:..." print a message 2152 * 2153 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 2154 * is still open (e.g, ftp xfer with trailing /) 2155 */ 2156 static int 2157 go_fetch(const char *url) 2158 { 2159 char *proxyenv; 2160 char *p; 2161 2162 #ifndef NO_ABOUT 2163 /* 2164 * Check for about:* 2165 */ 2166 if (STRNEQUAL(url, ABOUT_URL)) { 2167 url += sizeof(ABOUT_URL) -1; 2168 if (strcasecmp(url, "ftp") == 0 || 2169 strcasecmp(url, "tnftp") == 0) { 2170 fputs( 2171 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 2172 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 2173 } else if (strcasecmp(url, "lukem") == 0) { 2174 fputs( 2175 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 2176 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 2177 } else if (strcasecmp(url, "netbsd") == 0) { 2178 fputs( 2179 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 2180 "For more information, see http://www.NetBSD.org/\n", ttyout); 2181 } else if (strcasecmp(url, "version") == 0) { 2182 fprintf(ttyout, "Version: %s %s%s\n", 2183 FTP_PRODUCT, FTP_VERSION, 2184 #ifdef INET6 2185 "" 2186 #else 2187 " (-IPv6)" 2188 #endif 2189 ); 2190 } else { 2191 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 2192 } 2193 fputs("\n", ttyout); 2194 return (0); 2195 } 2196 #endif 2197 2198 /* 2199 * Check for file:// and http:// URLs. 2200 */ 2201 if (STRNEQUAL(url, HTTP_URL) 2202 #ifdef WITH_SSL 2203 || STRNEQUAL(url, HTTPS_URL) 2204 #endif 2205 || STRNEQUAL(url, FILE_URL)) 2206 return (fetch_url(url, NULL, NULL, NULL)); 2207 2208 /* 2209 * If it contains "://" but does not begin with ftp:// 2210 * or something that was already handled, then it's 2211 * unsupported. 2212 * 2213 * If it contains ":" but not "://" then we assume the 2214 * part before the colon is a host name, not an URL scheme, 2215 * so we don't try to match that here. 2216 */ 2217 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 2218 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 2219 2220 /* 2221 * Try FTP URL-style and host:file arguments next. 2222 * If ftpproxy is set with an FTP URL, use fetch_url() 2223 * Othewise, use fetch_ftp(). 2224 */ 2225 proxyenv = getoptionvalue("ftp_proxy"); 2226 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 2227 return (fetch_url(url, NULL, NULL, NULL)); 2228 2229 return (fetch_ftp(url)); 2230 } 2231 2232 /* 2233 * Retrieve multiple files from the command line, 2234 * calling go_fetch() for each file. 2235 * 2236 * If an ftp path has a trailing "/", the path will be cd-ed into and 2237 * the connection remains open, and the function will return -1 2238 * (to indicate the connection is alive). 2239 * If an error occurs the return value will be the offset+1 in 2240 * argv[] of the file that caused a problem (i.e, argv[x] 2241 * returns x+1) 2242 * Otherwise, 0 is returned if all files retrieved successfully. 2243 */ 2244 int 2245 auto_fetch(int argc, char *argv[]) 2246 { 2247 volatile int argpos, rval; 2248 2249 argpos = rval = 0; 2250 2251 if (sigsetjmp(toplevel, 1)) { 2252 if (connected) 2253 disconnect(0, NULL); 2254 if (rval > 0) 2255 rval = argpos + 1; 2256 return (rval); 2257 } 2258 (void)xsignal(SIGINT, intr); 2259 (void)xsignal(SIGPIPE, lostpeer); 2260 2261 /* 2262 * Loop through as long as there's files to fetch. 2263 */ 2264 for (; (rval == 0) && (argpos < argc); argpos++) { 2265 if (strchr(argv[argpos], ':') == NULL) 2266 break; 2267 redirect_loop = 0; 2268 if (!anonftp) 2269 anonftp = 2; /* Handle "automatic" transfers. */ 2270 rval = go_fetch(argv[argpos]); 2271 if (outfile != NULL && strcmp(outfile, "-") != 0 2272 && outfile[0] != '|') 2273 outfile = NULL; 2274 if (rval > 0) 2275 rval = argpos + 1; 2276 } 2277 2278 if (connected && rval != -1) 2279 disconnect(0, NULL); 2280 return (rval); 2281 } 2282 2283 2284 /* 2285 * Upload multiple files from the command line. 2286 * 2287 * If an error occurs the return value will be the offset+1 in 2288 * argv[] of the file that caused a problem (i.e, argv[x] 2289 * returns x+1) 2290 * Otherwise, 0 is returned if all files uploaded successfully. 2291 */ 2292 int 2293 auto_put(int argc, char **argv, const char *uploadserver) 2294 { 2295 char *uargv[4], *path, *pathsep; 2296 int uargc, rval, argpos; 2297 size_t len; 2298 char cmdbuf[MAX_C_NAME]; 2299 2300 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 2301 uargv[0] = cmdbuf; 2302 uargv[1] = argv[0]; 2303 uargc = 2; 2304 uargv[2] = uargv[3] = NULL; 2305 pathsep = NULL; 2306 rval = 1; 2307 2308 DPRINTF("auto_put: target `%s'\n", uploadserver); 2309 2310 path = ftp_strdup(uploadserver); 2311 len = strlen(path); 2312 if (path[len - 1] != '/' && path[len - 1] != ':') { 2313 /* 2314 * make sure we always pass a directory to auto_fetch 2315 */ 2316 if (argc > 1) { /* more than one file to upload */ 2317 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 2318 free(path); 2319 path = (char *)ftp_malloc(len); 2320 (void)strlcpy(path, uploadserver, len); 2321 (void)strlcat(path, "/", len); 2322 } else { /* single file to upload */ 2323 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 2324 uargv[0] = cmdbuf; 2325 pathsep = strrchr(path, '/'); 2326 if (pathsep == NULL) { 2327 pathsep = strrchr(path, ':'); 2328 if (pathsep == NULL) { 2329 warnx("Invalid URL `%s'", path); 2330 goto cleanup_auto_put; 2331 } 2332 pathsep++; 2333 uargv[2] = ftp_strdup(pathsep); 2334 pathsep[0] = '/'; 2335 } else 2336 uargv[2] = ftp_strdup(pathsep + 1); 2337 pathsep[1] = '\0'; 2338 uargc++; 2339 } 2340 } 2341 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 2342 path, STRorNULL(uargv[2])); 2343 2344 /* connect and cwd */ 2345 rval = auto_fetch(1, &path); 2346 if(rval >= 0) 2347 goto cleanup_auto_put; 2348 2349 rval = 0; 2350 2351 /* target filename provided; upload 1 file */ 2352 /* XXX : is this the best way? */ 2353 if (uargc == 3) { 2354 uargv[1] = argv[0]; 2355 put(uargc, uargv); 2356 if ((code / 100) != COMPLETE) 2357 rval = 1; 2358 } else { /* otherwise a target dir: upload all files to it */ 2359 for(argpos = 0; argv[argpos] != NULL; argpos++) { 2360 uargv[1] = argv[argpos]; 2361 mput(uargc, uargv); 2362 if ((code / 100) != COMPLETE) { 2363 rval = argpos + 1; 2364 break; 2365 } 2366 } 2367 } 2368 2369 cleanup_auto_put: 2370 free(path); 2371 FREEPTR(uargv[2]); 2372 return (rval); 2373 } 2374