1 /* $NetBSD: fetch.c,v 1.222 2016/03/18 18:42:25 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 1.222 2016/03/18 18:42:25 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:%s HTTP/1.1\r\n", h, ui->port); 851 fetch_printf(fin, "Host: %s:%s\r\n", h, ui->port); 852 } 853 #endif 854 855 #define C_OK 0 856 #define C_CLEANUP 1 857 #define C_IMPROPER 2 858 #define C_PROXY 3 859 #define C_NOPROXY 4 860 861 static int 862 getresponseline(FETCH *fin, char *buf, size_t buflen, int *len) 863 { 864 const char *errormsg; 865 866 alarmtimer(quit_time ? quit_time : 60); 867 *len = fetch_getline(fin, buf, buflen, &errormsg); 868 alarmtimer(0); 869 if (*len < 0) { 870 if (*errormsg == '\n') 871 errormsg++; 872 warnx("Receiving HTTP reply: %s", errormsg); 873 return C_CLEANUP; 874 } 875 while (*len > 0 && (ISLWS(buf[*len-1]))) 876 buf[--*len] = '\0'; 877 878 if (*len) 879 DPRINTF("%s: received `%s'\n", __func__, buf); 880 return C_OK; 881 } 882 883 static int 884 getresponse(FETCH *fin, char **cp, size_t buflen, int *hcode) 885 { 886 int len, rv; 887 char *ep, *buf = *cp; 888 889 *hcode = 0; 890 if ((rv = getresponseline(fin, buf, buflen, &len)) != C_OK) 891 return rv; 892 893 /* Determine HTTP response code */ 894 *cp = strchr(buf, ' '); 895 if (*cp == NULL) 896 return C_IMPROPER; 897 898 (*cp)++; 899 900 *hcode = strtol(*cp, &ep, 10); 901 if (*ep != '\0' && !isspace((unsigned char)*ep)) 902 return C_IMPROPER; 903 904 return C_OK; 905 } 906 907 static int 908 parse_posinfo(const char **cp, struct posinfo *pi) 909 { 910 char *ep; 911 if (!match_token(cp, "bytes")) 912 return -1; 913 914 if (**cp == '*') 915 (*cp)++; 916 else { 917 pi->rangestart = STRTOLL(*cp, &ep, 10); 918 if (pi->rangestart < 0 || *ep != '-') 919 return -1; 920 *cp = ep + 1; 921 pi->rangeend = STRTOLL(*cp, &ep, 10); 922 if (pi->rangeend < 0 || pi->rangeend < pi->rangestart) 923 return -1; 924 *cp = ep; 925 } 926 if (**cp != '/') 927 return -1; 928 (*cp)++; 929 if (**cp == '*') 930 (*cp)++; 931 else { 932 pi->entitylen = STRTOLL(*cp, &ep, 10); 933 if (pi->entitylen < 0) 934 return -1; 935 *cp = ep; 936 } 937 if (**cp != '\0') 938 return -1; 939 940 #ifndef NO_DEBUG 941 if (ftp_debug) { 942 fprintf(ttyout, "parsed range as: "); 943 if (pi->rangestart == -1) 944 fprintf(ttyout, "*"); 945 else 946 fprintf(ttyout, LLF "-" LLF, (LLT)pi->rangestart, 947 (LLT)pi->rangeend); 948 fprintf(ttyout, "/" LLF "\n", (LLT)pi->entitylen); 949 } 950 #endif 951 return 0; 952 } 953 954 static int 955 negotiate_connection(FETCH *fin, const char *url, const char *penv, 956 struct posinfo *pi, time_t *mtime, struct authinfo *wauth, 957 struct authinfo *pauth, volatile int *rval, volatile int *ischunked, 958 char **auth) 959 { 960 int len, hcode, rv; 961 char buf[FTPBUFLEN], *ep; 962 const char *cp, *token; 963 char *location, *message; 964 965 *auth = message = location = NULL; 966 967 /* Read the response */ 968 ep = buf; 969 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 970 case C_CLEANUP: 971 goto cleanup_fetch_url; 972 case C_IMPROPER: 973 goto improper; 974 case C_OK: 975 message = ftp_strdup(ep); 976 break; 977 } 978 979 /* Read the rest of the header. */ 980 981 for (;;) { 982 if ((rv = getresponseline(fin, buf, sizeof(buf), &len)) != C_OK) 983 goto cleanup_fetch_url; 984 if (len == 0) 985 break; 986 987 /* 988 * Look for some headers 989 */ 990 991 cp = buf; 992 993 if (match_token(&cp, "Content-Length:")) { 994 filesize = STRTOLL(cp, &ep, 10); 995 if (filesize < 0 || *ep != '\0') 996 goto improper; 997 DPRINTF("%s: parsed len as: " LLF "\n", 998 __func__, (LLT)filesize); 999 1000 } else if (match_token(&cp, "Content-Range:")) { 1001 if (parse_posinfo(&cp, pi) == -1) 1002 goto improper; 1003 if (! restart_point) { 1004 warnx( 1005 "Received unexpected Content-Range header"); 1006 goto cleanup_fetch_url; 1007 } 1008 1009 } else if (match_token(&cp, "Last-Modified:")) { 1010 getmtime(cp, mtime); 1011 1012 } else if (match_token(&cp, "Location:")) { 1013 location = ftp_strdup(cp); 1014 DPRINTF("%s: parsed location as `%s'\n", 1015 __func__, cp); 1016 1017 } else if (match_token(&cp, "Transfer-Encoding:")) { 1018 if (match_token(&cp, "binary")) { 1019 warnx( 1020 "Bogus transfer encoding `binary' (fetching anyway)"); 1021 continue; 1022 } 1023 if (! (token = match_token(&cp, "chunked"))) { 1024 warnx( 1025 "Unsupported transfer encoding `%s'", 1026 token); 1027 goto cleanup_fetch_url; 1028 } 1029 (*ischunked)++; 1030 DPRINTF("%s: using chunked encoding\n", 1031 __func__); 1032 1033 } else if (match_token(&cp, "Proxy-Authenticate:") 1034 || match_token(&cp, "WWW-Authenticate:")) { 1035 if (! (token = match_token(&cp, "Basic"))) { 1036 DPRINTF("%s: skipping unknown auth " 1037 "scheme `%s'\n", __func__, token); 1038 continue; 1039 } 1040 FREEPTR(*auth); 1041 *auth = ftp_strdup(token); 1042 DPRINTF("%s: parsed auth as `%s'\n", 1043 __func__, cp); 1044 } 1045 1046 } 1047 /* finished parsing header */ 1048 1049 switch (hcode) { 1050 case 200: 1051 break; 1052 case 206: 1053 if (! restart_point) { 1054 warnx("Not expecting partial content header"); 1055 goto cleanup_fetch_url; 1056 } 1057 break; 1058 case 300: 1059 case 301: 1060 case 302: 1061 case 303: 1062 case 305: 1063 case 307: 1064 if (EMPTYSTRING(location)) { 1065 warnx( 1066 "No redirection Location provided by server"); 1067 goto cleanup_fetch_url; 1068 } 1069 if (redirect_loop++ > 5) { 1070 warnx("Too many redirections requested"); 1071 goto cleanup_fetch_url; 1072 } 1073 if (hcode == 305) { 1074 if (verbose) 1075 fprintf(ttyout, "Redirected via %s\n", 1076 location); 1077 *rval = fetch_url(url, location, 1078 pauth->auth, wauth->auth); 1079 } else { 1080 if (verbose) 1081 fprintf(ttyout, "Redirected to %s\n", 1082 location); 1083 *rval = go_fetch(location); 1084 } 1085 goto cleanup_fetch_url; 1086 #ifndef NO_AUTH 1087 case 401: 1088 case 407: 1089 { 1090 struct authinfo aauth; 1091 char **authp; 1092 1093 if (hcode == 401) 1094 aauth = *wauth; 1095 else 1096 aauth = *pauth; 1097 1098 if (verbose || aauth.auth == NULL || 1099 aauth.user == NULL || aauth.pass == NULL) 1100 fprintf(ttyout, "%s\n", message); 1101 if (EMPTYSTRING(*auth)) { 1102 warnx( 1103 "No authentication challenge provided by server"); 1104 goto cleanup_fetch_url; 1105 } 1106 1107 if (aauth.auth != NULL) { 1108 char reply[10]; 1109 1110 fprintf(ttyout, 1111 "Authorization failed. Retry (y/n)? "); 1112 if (get_line(stdin, reply, sizeof(reply), NULL) 1113 < 0) { 1114 goto cleanup_fetch_url; 1115 } 1116 if (tolower((unsigned char)reply[0]) != 'y') 1117 goto cleanup_fetch_url; 1118 aauth.user = NULL; 1119 aauth.pass = NULL; 1120 } 1121 1122 authp = &aauth.auth; 1123 if (auth_url(*auth, authp, &aauth) == 0) { 1124 *rval = fetch_url(url, penv, 1125 pauth->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 default: 1221 if (message) 1222 warnx("Error proxy connect " "`%s'", message); 1223 else 1224 warnx("Unknown error proxy " "connect"); 1225 goto cleanup_fetch_url; 1226 } 1227 1228 if ((ssl = fetch_start_ssl(s, oui->host)) == NULL) 1229 goto cleanup_fetch_url; 1230 fetch_set_ssl(fin, ssl); 1231 1232 rv = C_OK; 1233 goto out; 1234 improper: 1235 rv = C_IMPROPER; 1236 goto out; 1237 cleanup_fetch_url: 1238 rv = C_CLEANUP; 1239 goto out; 1240 out: 1241 FREEPTR(message); 1242 return rv; 1243 } 1244 #endif 1245 1246 /* 1247 * Retrieve URL, via a proxy if necessary, using HTTP. 1248 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 1249 * http_proxy/https_proxy as appropriate. 1250 * Supports HTTP redirects. 1251 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1252 * is still open (e.g, ftp xfer with trailing /) 1253 */ 1254 static int 1255 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 1256 { 1257 sigfunc volatile oldint; 1258 sigfunc volatile oldpipe; 1259 sigfunc volatile oldalrm; 1260 sigfunc volatile oldquit; 1261 int volatile s; 1262 struct stat sb; 1263 int volatile isproxy; 1264 int volatile rval, ischunked; 1265 size_t flen; 1266 static size_t bufsize; 1267 static char *xferbuf; 1268 const char *cp; 1269 char *ep; 1270 char *auth; 1271 char *volatile savefile; 1272 char *volatile location; 1273 char *volatile message; 1274 char *volatile decodedpath; 1275 struct authinfo wauth, pauth; 1276 struct posinfo pi; 1277 off_t hashbytes; 1278 int (*volatile closefunc)(FILE *); 1279 FETCH *volatile fin; 1280 FILE *volatile fout; 1281 const char *volatile penv = proxyenv; 1282 struct urlinfo ui, oui; 1283 time_t mtime; 1284 void *ssl = NULL; 1285 1286 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 1287 1288 oldquit = oldalrm = oldint = oldpipe = NULL; 1289 closefunc = NULL; 1290 fin = NULL; 1291 fout = NULL; 1292 s = -1; 1293 savefile = NULL; 1294 auth = location = message = NULL; 1295 ischunked = isproxy = 0; 1296 rval = 1; 1297 1298 initurlinfo(&ui); 1299 initauthinfo(&wauth, wwwauth); 1300 initauthinfo(&pauth, proxyauth); 1301 1302 decodedpath = NULL; 1303 1304 if (sigsetjmp(httpabort, 1)) 1305 goto cleanup_fetch_url; 1306 1307 if (parse_url(url, "URL", &ui, &wauth) == -1) 1308 goto cleanup_fetch_url; 1309 1310 copyurlinfo(&oui, &ui); 1311 1312 if (ui.utype == FILE_URL_T && ! EMPTYSTRING(ui.host) 1313 && strcasecmp(ui.host, "localhost") != 0) { 1314 warnx("No support for non local file URL `%s'", url); 1315 goto cleanup_fetch_url; 1316 } 1317 1318 if (EMPTYSTRING(ui.path)) { 1319 if (ui.utype == FTP_URL_T) { 1320 rval = fetch_ftp(url); 1321 goto cleanup_fetch_url; 1322 } 1323 if (!IS_HTTP_TYPE(ui.utype) || outfile == NULL) { 1324 warnx("Invalid URL (no file after host) `%s'", url); 1325 goto cleanup_fetch_url; 1326 } 1327 } 1328 1329 decodedpath = ftp_strdup(ui.path); 1330 url_decode(decodedpath); 1331 1332 if (outfile) 1333 savefile = outfile; 1334 else { 1335 cp = strrchr(decodedpath, '/'); /* find savefile */ 1336 if (cp != NULL) 1337 savefile = ftp_strdup(cp + 1); 1338 else 1339 savefile = ftp_strdup(decodedpath); 1340 } 1341 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 1342 if (EMPTYSTRING(savefile)) { 1343 if (ui.utype == FTP_URL_T) { 1344 rval = fetch_ftp(url); 1345 goto cleanup_fetch_url; 1346 } 1347 warnx("No file after directory (you must specify an " 1348 "output file) `%s'", url); 1349 goto cleanup_fetch_url; 1350 } 1351 1352 restart_point = 0; 1353 filesize = -1; 1354 initposinfo(&pi); 1355 mtime = -1; 1356 if (restartautofetch) { 1357 if (stat(savefile, &sb) == 0) 1358 restart_point = sb.st_size; 1359 } 1360 if (ui.utype == FILE_URL_T) { /* file:// URLs */ 1361 direction = "copied"; 1362 fin = fetch_open(decodedpath, "r"); 1363 if (fin == NULL) { 1364 warn("Can't open `%s'", decodedpath); 1365 goto cleanup_fetch_url; 1366 } 1367 if (fstat(fetch_fileno(fin), &sb) == 0) { 1368 mtime = sb.st_mtime; 1369 filesize = sb.st_size; 1370 } 1371 if (restart_point) { 1372 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 1373 warn("Can't seek to restart `%s'", 1374 decodedpath); 1375 goto cleanup_fetch_url; 1376 } 1377 } 1378 if (verbose) { 1379 fprintf(ttyout, "Copying %s", decodedpath); 1380 if (restart_point) 1381 fprintf(ttyout, " (restarting at " LLF ")", 1382 (LLT)restart_point); 1383 fputs("\n", ttyout); 1384 } 1385 if (0 == rcvbuf_size) { 1386 rcvbuf_size = 8 * 1024; /* XXX */ 1387 } 1388 } else { /* ftp:// or http:// URLs */ 1389 int hasleading; 1390 1391 if (penv == NULL) { 1392 #ifdef WITH_SSL 1393 if (ui.utype == HTTPS_URL_T) 1394 penv = getoptionvalue("https_proxy"); 1395 #endif 1396 if (penv == NULL && IS_HTTP_TYPE(ui.utype)) 1397 penv = getoptionvalue("http_proxy"); 1398 else if (ui.utype == FTP_URL_T) 1399 penv = getoptionvalue("ftp_proxy"); 1400 } 1401 direction = "retrieved"; 1402 if (! EMPTYSTRING(penv)) { /* use proxy */ 1403 1404 isproxy = handle_noproxy(ui.host, ui.portnum); 1405 1406 if (isproxy == 0 && ui.utype == FTP_URL_T) { 1407 rval = fetch_ftp(url); 1408 goto cleanup_fetch_url; 1409 } 1410 1411 if (isproxy) { 1412 if (restart_point) { 1413 warnx( 1414 "Can't restart via proxy URL `%s'", 1415 penv); 1416 goto cleanup_fetch_url; 1417 } 1418 if (handle_proxy(url, penv, &ui, &pauth) < 0) 1419 goto cleanup_fetch_url; 1420 } 1421 } /* ! EMPTYSTRING(penv) */ 1422 1423 s = ftp_socket(&ui, &ssl); 1424 if (s < 0) { 1425 warnx("Can't connect to `%s:%s'", ui.host, ui.port); 1426 goto cleanup_fetch_url; 1427 } 1428 1429 oldalrm = xsignal(SIGALRM, timeouthttp); 1430 alarmtimer(quit_time ? quit_time : 60); 1431 fin = fetch_fdopen(s, "r+"); 1432 fetch_set_ssl(fin, ssl); 1433 alarmtimer(0); 1434 1435 alarmtimer(quit_time ? quit_time : 60); 1436 /* 1437 * Construct and send the request. 1438 */ 1439 if (verbose) 1440 fprintf(ttyout, "Requesting %s\n", url); 1441 1442 hasleading = 0; 1443 #ifdef WITH_SSL 1444 if (isproxy && oui.utype == HTTPS_URL_T) { 1445 switch (connectmethod(s, fin, &oui, &ui, &pauth, &auth, 1446 &hasleading)) { 1447 case C_CLEANUP: 1448 goto cleanup_fetch_url; 1449 case C_IMPROPER: 1450 goto improper; 1451 case C_OK: 1452 break; 1453 default: 1454 abort(); 1455 } 1456 } 1457 #endif 1458 1459 hasleading = print_get(fin, hasleading, isproxy, &oui, &ui); 1460 1461 if (flushcache) 1462 print_cache(fin, isproxy); 1463 1464 print_agent(fin); 1465 hasleading = print_proxy(fin, hasleading, wauth.auth, 1466 auth ? NULL : pauth.auth); 1467 if (hasleading) { 1468 hasleading = 0; 1469 if (verbose) 1470 fputs(")\n", ttyout); 1471 } 1472 1473 fetch_printf(fin, "\r\n"); 1474 if (fetch_flush(fin) == EOF) { 1475 warn("Writing HTTP request"); 1476 alarmtimer(0); 1477 goto cleanup_fetch_url; 1478 } 1479 alarmtimer(0); 1480 1481 switch (negotiate_connection(fin, url, penv, &pi, 1482 &mtime, &wauth, &pauth, &rval, &ischunked, &auth)) { 1483 case C_OK: 1484 break; 1485 case C_CLEANUP: 1486 goto cleanup_fetch_url; 1487 case C_IMPROPER: 1488 goto improper; 1489 default: 1490 abort(); 1491 } 1492 } 1493 1494 /* Open the output file. */ 1495 1496 /* 1497 * Only trust filenames with special meaning if they came from 1498 * the command line 1499 */ 1500 if (outfile == savefile) { 1501 if (strcmp(savefile, "-") == 0) { 1502 fout = stdout; 1503 } else if (*savefile == '|') { 1504 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1505 fout = popen(savefile + 1, "w"); 1506 if (fout == NULL) { 1507 warn("Can't execute `%s'", savefile + 1); 1508 goto cleanup_fetch_url; 1509 } 1510 closefunc = pclose; 1511 } 1512 } 1513 if (fout == NULL) { 1514 if ((pi.rangeend != -1 && pi.rangeend <= restart_point) || 1515 (pi.rangestart == -1 && 1516 filesize != -1 && filesize <= restart_point)) { 1517 /* already done */ 1518 if (verbose) 1519 fprintf(ttyout, "already done\n"); 1520 rval = 0; 1521 goto cleanup_fetch_url; 1522 } 1523 if (restart_point && pi.rangestart != -1) { 1524 if (pi.entitylen != -1) 1525 filesize = pi.entitylen; 1526 if (pi.rangestart != restart_point) { 1527 warnx( 1528 "Size of `%s' differs from save file `%s'", 1529 url, savefile); 1530 goto cleanup_fetch_url; 1531 } 1532 fout = fopen(savefile, "a"); 1533 } else 1534 fout = fopen(savefile, "w"); 1535 if (fout == NULL) { 1536 warn("Can't open `%s'", savefile); 1537 goto cleanup_fetch_url; 1538 } 1539 closefunc = fclose; 1540 } 1541 1542 /* Trap signals */ 1543 oldquit = xsignal(SIGQUIT, psummary); 1544 oldint = xsignal(SIGINT, aborthttp); 1545 1546 assert(rcvbuf_size > 0); 1547 if ((size_t)rcvbuf_size > bufsize) { 1548 if (xferbuf) 1549 (void)free(xferbuf); 1550 bufsize = rcvbuf_size; 1551 xferbuf = ftp_malloc(bufsize); 1552 } 1553 1554 bytes = 0; 1555 hashbytes = mark; 1556 if (oldalrm) { 1557 (void)xsignal(SIGALRM, oldalrm); 1558 oldalrm = NULL; 1559 } 1560 progressmeter(-1); 1561 1562 /* Finally, suck down the file. */ 1563 do { 1564 long chunksize; 1565 short lastchunk; 1566 1567 chunksize = 0; 1568 lastchunk = 0; 1569 /* read chunk-size */ 1570 if (ischunked) { 1571 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1572 warnx("Unexpected EOF reading chunk-size"); 1573 goto cleanup_fetch_url; 1574 } 1575 errno = 0; 1576 chunksize = strtol(xferbuf, &ep, 16); 1577 if (ep == xferbuf) { 1578 warnx("Invalid chunk-size"); 1579 goto cleanup_fetch_url; 1580 } 1581 if (errno == ERANGE || chunksize < 0) { 1582 errno = ERANGE; 1583 warn("Chunk-size `%.*s'", 1584 (int)(ep-xferbuf), xferbuf); 1585 goto cleanup_fetch_url; 1586 } 1587 1588 /* 1589 * XXX: Work around bug in Apache 1.3.9 and 1590 * 1.3.11, which incorrectly put trailing 1591 * space after the chunk-size. 1592 */ 1593 while (*ep == ' ') 1594 ep++; 1595 1596 /* skip [ chunk-ext ] */ 1597 if (*ep == ';') { 1598 while (*ep && *ep != '\r') 1599 ep++; 1600 } 1601 1602 if (strcmp(ep, "\r\n") != 0) { 1603 warnx("Unexpected data following chunk-size"); 1604 goto cleanup_fetch_url; 1605 } 1606 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1607 (LLT)chunksize); 1608 if (chunksize == 0) { 1609 lastchunk = 1; 1610 goto chunkdone; 1611 } 1612 } 1613 /* transfer file or chunk */ 1614 while (1) { 1615 struct timeval then, now, td; 1616 volatile off_t bufrem; 1617 1618 if (rate_get) 1619 (void)gettimeofday(&then, NULL); 1620 bufrem = rate_get ? rate_get : (off_t)bufsize; 1621 if (ischunked) 1622 bufrem = MIN(chunksize, bufrem); 1623 while (bufrem > 0) { 1624 flen = fetch_read(xferbuf, sizeof(char), 1625 MIN((off_t)bufsize, bufrem), fin); 1626 if (flen <= 0) 1627 goto chunkdone; 1628 bytes += flen; 1629 bufrem -= flen; 1630 if (fwrite(xferbuf, sizeof(char), flen, fout) 1631 != flen) { 1632 warn("Writing `%s'", savefile); 1633 goto cleanup_fetch_url; 1634 } 1635 if (hash && !progress) { 1636 while (bytes >= hashbytes) { 1637 (void)putc('#', ttyout); 1638 hashbytes += mark; 1639 } 1640 (void)fflush(ttyout); 1641 } 1642 if (ischunked) { 1643 chunksize -= flen; 1644 if (chunksize <= 0) 1645 break; 1646 } 1647 } 1648 if (rate_get) { 1649 while (1) { 1650 (void)gettimeofday(&now, NULL); 1651 timersub(&now, &then, &td); 1652 if (td.tv_sec > 0) 1653 break; 1654 usleep(1000000 - td.tv_usec); 1655 } 1656 } 1657 if (ischunked && chunksize <= 0) 1658 break; 1659 } 1660 /* read CRLF after chunk*/ 1661 chunkdone: 1662 if (ischunked) { 1663 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1664 alarmtimer(0); 1665 warnx("Unexpected EOF reading chunk CRLF"); 1666 goto cleanup_fetch_url; 1667 } 1668 if (strcmp(xferbuf, "\r\n") != 0) { 1669 warnx("Unexpected data following chunk"); 1670 goto cleanup_fetch_url; 1671 } 1672 if (lastchunk) 1673 break; 1674 } 1675 } while (ischunked); 1676 1677 /* XXX: deal with optional trailer & CRLF here? */ 1678 1679 if (hash && !progress && bytes > 0) { 1680 if (bytes < mark) 1681 (void)putc('#', ttyout); 1682 (void)putc('\n', ttyout); 1683 } 1684 if (fetch_error(fin)) { 1685 warn("Reading file"); 1686 goto cleanup_fetch_url; 1687 } 1688 progressmeter(1); 1689 (void)fflush(fout); 1690 if (closefunc == fclose && mtime != -1) { 1691 struct timeval tval[2]; 1692 1693 (void)gettimeofday(&tval[0], NULL); 1694 tval[1].tv_sec = mtime; 1695 tval[1].tv_usec = 0; 1696 (*closefunc)(fout); 1697 fout = NULL; 1698 1699 if (utimes(savefile, tval) == -1) { 1700 fprintf(ttyout, 1701 "Can't change modification time to %s", 1702 rfc2822time(localtime(&mtime))); 1703 } 1704 } 1705 if (bytes > 0) 1706 ptransfer(0); 1707 bytes = 0; 1708 1709 rval = 0; 1710 goto cleanup_fetch_url; 1711 1712 improper: 1713 warnx("Improper response from `%s:%s'", ui.host, ui.port); 1714 1715 cleanup_fetch_url: 1716 if (oldint) 1717 (void)xsignal(SIGINT, oldint); 1718 if (oldpipe) 1719 (void)xsignal(SIGPIPE, oldpipe); 1720 if (oldalrm) 1721 (void)xsignal(SIGALRM, oldalrm); 1722 if (oldquit) 1723 (void)xsignal(SIGQUIT, oldpipe); 1724 if (fin != NULL) 1725 fetch_close(fin); 1726 else if (s != -1) 1727 close(s); 1728 if (closefunc != NULL && fout != NULL) 1729 (*closefunc)(fout); 1730 if (savefile != outfile) 1731 FREEPTR(savefile); 1732 freeurlinfo(&ui); 1733 freeurlinfo(&oui); 1734 freeauthinfo(&wauth); 1735 freeauthinfo(&pauth); 1736 FREEPTR(decodedpath); 1737 FREEPTR(auth); 1738 FREEPTR(location); 1739 FREEPTR(message); 1740 return (rval); 1741 } 1742 1743 /* 1744 * Abort a HTTP retrieval 1745 */ 1746 static void 1747 aborthttp(int notused) 1748 { 1749 char msgbuf[100]; 1750 int len; 1751 1752 sigint_raised = 1; 1753 alarmtimer(0); 1754 if (fromatty) { 1755 len = snprintf(msgbuf, sizeof(msgbuf), 1756 "\n%s: HTTP fetch aborted.\n", getprogname()); 1757 if (len > 0) 1758 write(fileno(ttyout), msgbuf, len); 1759 } 1760 siglongjmp(httpabort, 1); 1761 } 1762 1763 static void 1764 timeouthttp(int notused) 1765 { 1766 char msgbuf[100]; 1767 int len; 1768 1769 alarmtimer(0); 1770 if (fromatty) { 1771 len = snprintf(msgbuf, sizeof(msgbuf), 1772 "\n%s: HTTP fetch timeout.\n", getprogname()); 1773 if (len > 0) 1774 write(fileno(ttyout), msgbuf, len); 1775 } 1776 siglongjmp(httpabort, 1); 1777 } 1778 1779 /* 1780 * Retrieve ftp URL or classic ftp argument using FTP. 1781 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1782 * is still open (e.g, ftp xfer with trailing /) 1783 */ 1784 static int 1785 fetch_ftp(const char *url) 1786 { 1787 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1788 char *dir, *file; 1789 char cmdbuf[MAXPATHLEN]; 1790 char dirbuf[4]; 1791 int dirhasglob, filehasglob, rval, transtype, xargc; 1792 int oanonftp, oautologin; 1793 struct authinfo auth; 1794 struct urlinfo ui; 1795 1796 DPRINTF("fetch_ftp: `%s'\n", url); 1797 dir = file = NULL; 1798 rval = 1; 1799 transtype = TYPE_I; 1800 1801 initurlinfo(&ui); 1802 initauthinfo(&auth, NULL); 1803 1804 if (STRNEQUAL(url, FTP_URL)) { 1805 if ((parse_url(url, "URL", &ui, &auth) == -1) || 1806 (auth.user != NULL && *auth.user == '\0') || 1807 EMPTYSTRING(ui.host)) { 1808 warnx("Invalid URL `%s'", url); 1809 goto cleanup_fetch_ftp; 1810 } 1811 /* 1812 * Note: Don't url_decode(path) here. We need to keep the 1813 * distinction between "/" and "%2F" until later. 1814 */ 1815 1816 /* check for trailing ';type=[aid]' */ 1817 if (! EMPTYSTRING(ui.path) && (cp = strrchr(ui.path, ';')) != NULL) { 1818 if (strcasecmp(cp, ";type=a") == 0) 1819 transtype = TYPE_A; 1820 else if (strcasecmp(cp, ";type=i") == 0) 1821 transtype = TYPE_I; 1822 else if (strcasecmp(cp, ";type=d") == 0) { 1823 warnx( 1824 "Directory listing via a URL is not supported"); 1825 goto cleanup_fetch_ftp; 1826 } else { 1827 warnx("Invalid suffix `%s' in URL `%s'", cp, 1828 url); 1829 goto cleanup_fetch_ftp; 1830 } 1831 *cp = 0; 1832 } 1833 } else { /* classic style `[user@]host:[file]' */ 1834 ui.utype = CLASSIC_URL_T; 1835 ui.host = ftp_strdup(url); 1836 cp = strchr(ui.host, '@'); 1837 if (cp != NULL) { 1838 *cp = '\0'; 1839 auth.user = ui.host; 1840 anonftp = 0; /* disable anonftp */ 1841 ui.host = ftp_strdup(cp + 1); 1842 } 1843 cp = strchr(ui.host, ':'); 1844 if (cp != NULL) { 1845 *cp = '\0'; 1846 ui.path = ftp_strdup(cp + 1); 1847 } 1848 } 1849 if (EMPTYSTRING(ui.host)) 1850 goto cleanup_fetch_ftp; 1851 1852 /* Extract the file and (if present) directory name. */ 1853 dir = ui.path; 1854 if (! EMPTYSTRING(dir)) { 1855 /* 1856 * If we are dealing with classic `[user@]host:[path]' syntax, 1857 * then a path of the form `/file' (resulting from input of the 1858 * form `host:/file') means that we should do "CWD /" before 1859 * retrieving the file. So we set dir="/" and file="file". 1860 * 1861 * But if we are dealing with URLs like `ftp://host/path' then 1862 * a path of the form `/file' (resulting from a URL of the form 1863 * `ftp://host//file') means that we should do `CWD ' (with an 1864 * empty argument) before retrieving the file. So we set 1865 * dir="" and file="file". 1866 * 1867 * If the path does not contain / at all, we set dir=NULL. 1868 * (We get a path without any slashes if we are dealing with 1869 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1870 * 1871 * In all other cases, we set dir to a string that does not 1872 * include the final '/' that separates the dir part from the 1873 * file part of the path. (This will be the empty string if 1874 * and only if we are dealing with a path of the form `/file' 1875 * resulting from an URL of the form `ftp://host//file'.) 1876 */ 1877 cp = strrchr(dir, '/'); 1878 if (cp == dir && ui.utype == CLASSIC_URL_T) { 1879 file = cp + 1; 1880 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1881 dir = dirbuf; 1882 } else if (cp != NULL) { 1883 *cp++ = '\0'; 1884 file = cp; 1885 } else { 1886 file = dir; 1887 dir = NULL; 1888 } 1889 } else 1890 dir = NULL; 1891 if (ui.utype == FTP_URL_T && file != NULL) { 1892 url_decode(file); 1893 /* but still don't url_decode(dir) */ 1894 } 1895 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1896 "path `%s' dir `%s' file `%s'\n", 1897 STRorNULL(auth.user), STRorNULL(auth.pass), 1898 STRorNULL(ui.host), STRorNULL(ui.port), 1899 STRorNULL(ui.path), STRorNULL(dir), STRorNULL(file)); 1900 1901 dirhasglob = filehasglob = 0; 1902 if (doglob && ui.utype == CLASSIC_URL_T) { 1903 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1904 dirhasglob = 1; 1905 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1906 filehasglob = 1; 1907 } 1908 1909 /* Set up the connection */ 1910 oanonftp = anonftp; 1911 if (connected) 1912 disconnect(0, NULL); 1913 anonftp = oanonftp; 1914 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1915 xargv[0] = cmdbuf; 1916 xargv[1] = ui.host; 1917 xargv[2] = NULL; 1918 xargc = 2; 1919 if (ui.port) { 1920 xargv[2] = ui.port; 1921 xargv[3] = NULL; 1922 xargc = 3; 1923 } 1924 oautologin = autologin; 1925 /* don't autologin in setpeer(), use ftp_login() below */ 1926 autologin = 0; 1927 setpeer(xargc, xargv); 1928 autologin = oautologin; 1929 if ((connected == 0) || 1930 (connected == 1 && !ftp_login(ui.host, auth.user, auth.pass))) { 1931 warnx("Can't connect or login to host `%s:%s'", 1932 ui.host, ui.port ? ui.port : "?"); 1933 goto cleanup_fetch_ftp; 1934 } 1935 1936 switch (transtype) { 1937 case TYPE_A: 1938 setascii(1, xargv); 1939 break; 1940 case TYPE_I: 1941 setbinary(1, xargv); 1942 break; 1943 default: 1944 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1945 } 1946 1947 /* 1948 * Change directories, if necessary. 1949 * 1950 * Note: don't use EMPTYSTRING(dir) below, because 1951 * dir=="" means something different from dir==NULL. 1952 */ 1953 if (dir != NULL && !dirhasglob) { 1954 char *nextpart; 1955 1956 /* 1957 * If we are dealing with a classic `[user@]host:[path]' 1958 * (urltype is CLASSIC_URL_T) then we have a raw directory 1959 * name (not encoded in any way) and we can change 1960 * directories in one step. 1961 * 1962 * If we are dealing with an `ftp://host/path' URL 1963 * (urltype is FTP_URL_T), then RFC 3986 says we need to 1964 * send a separate CWD command for each unescaped "/" 1965 * in the path, and we have to interpret %hex escaping 1966 * *after* we find the slashes. It's possible to get 1967 * empty components here, (from multiple adjacent 1968 * slashes in the path) and RFC 3986 says that we should 1969 * still do `CWD ' (with a null argument) in such cases. 1970 * 1971 * Many ftp servers don't support `CWD ', so if there's an 1972 * error performing that command, bail out with a descriptive 1973 * message. 1974 * 1975 * Examples: 1976 * 1977 * host: dir="", urltype=CLASSIC_URL_T 1978 * logged in (to default directory) 1979 * host:file dir=NULL, urltype=CLASSIC_URL_T 1980 * "RETR file" 1981 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1982 * "CWD dir", logged in 1983 * ftp://host/ dir="", urltype=FTP_URL_T 1984 * logged in (to default directory) 1985 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1986 * "CWD dir", logged in 1987 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1988 * "RETR file" 1989 * ftp://host//file dir="", urltype=FTP_URL_T 1990 * "CWD ", "RETR file" 1991 * host:/file dir="/", urltype=CLASSIC_URL_T 1992 * "CWD /", "RETR file" 1993 * ftp://host///file dir="/", urltype=FTP_URL_T 1994 * "CWD ", "CWD ", "RETR file" 1995 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1996 * "CWD /", "RETR file" 1997 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1998 * "CWD foo", "RETR file" 1999 * ftp://host/foo/bar/file dir="foo/bar" 2000 * "CWD foo", "CWD bar", "RETR file" 2001 * ftp://host//foo/bar/file dir="/foo/bar" 2002 * "CWD ", "CWD foo", "CWD bar", "RETR file" 2003 * ftp://host/foo//bar/file dir="foo//bar" 2004 * "CWD foo", "CWD ", "CWD bar", "RETR file" 2005 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 2006 * "CWD /", "CWD foo", "CWD bar", "RETR file" 2007 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 2008 * "CWD /foo", "CWD bar", "RETR file" 2009 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 2010 * "CWD /foo/bar", "RETR file" 2011 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 2012 * "RETR /foo/bar/file" 2013 * 2014 * Note that we don't need `dir' after this point. 2015 */ 2016 do { 2017 if (ui.utype == FTP_URL_T) { 2018 nextpart = strchr(dir, '/'); 2019 if (nextpart) { 2020 *nextpart = '\0'; 2021 nextpart++; 2022 } 2023 url_decode(dir); 2024 } else 2025 nextpart = NULL; 2026 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 2027 STRorNULL(dir), STRorNULL(nextpart)); 2028 if (ui.utype == FTP_URL_T || *dir != '\0') { 2029 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 2030 xargv[0] = cmdbuf; 2031 xargv[1] = dir; 2032 xargv[2] = NULL; 2033 dirchange = 0; 2034 cd(2, xargv); 2035 if (! dirchange) { 2036 if (*dir == '\0' && code == 500) 2037 fprintf(stderr, 2038 "\n" 2039 "ftp: The `CWD ' command (without a directory), which is required by\n" 2040 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 2041 " conflicts with the server's conformance to RFC 959.\n" 2042 " Try the same URL without the `//' in the URL pathname.\n" 2043 "\n"); 2044 goto cleanup_fetch_ftp; 2045 } 2046 } 2047 dir = nextpart; 2048 } while (dir != NULL); 2049 } 2050 2051 if (EMPTYSTRING(file)) { 2052 rval = -1; 2053 goto cleanup_fetch_ftp; 2054 } 2055 2056 if (dirhasglob) { 2057 (void)strlcpy(rempath, dir, sizeof(rempath)); 2058 (void)strlcat(rempath, "/", sizeof(rempath)); 2059 (void)strlcat(rempath, file, sizeof(rempath)); 2060 file = rempath; 2061 } 2062 2063 /* Fetch the file(s). */ 2064 xargc = 2; 2065 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 2066 xargv[0] = cmdbuf; 2067 xargv[1] = file; 2068 xargv[2] = NULL; 2069 if (dirhasglob || filehasglob) { 2070 int ointeractive; 2071 2072 ointeractive = interactive; 2073 interactive = 0; 2074 if (restartautofetch) 2075 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 2076 else 2077 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 2078 xargv[0] = cmdbuf; 2079 mget(xargc, xargv); 2080 interactive = ointeractive; 2081 } else { 2082 if (outfile == NULL) { 2083 cp = strrchr(file, '/'); /* find savefile */ 2084 if (cp != NULL) 2085 outfile = cp + 1; 2086 else 2087 outfile = file; 2088 } 2089 xargv[2] = (char *)outfile; 2090 xargv[3] = NULL; 2091 xargc++; 2092 if (restartautofetch) 2093 reget(xargc, xargv); 2094 else 2095 get(xargc, xargv); 2096 } 2097 2098 if ((code / 100) == COMPLETE) 2099 rval = 0; 2100 2101 cleanup_fetch_ftp: 2102 freeurlinfo(&ui); 2103 freeauthinfo(&auth); 2104 return (rval); 2105 } 2106 2107 /* 2108 * Retrieve the given file to outfile. 2109 * Supports arguments of the form: 2110 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 2111 * call fetch_ftp() 2112 * "http://host/path" call fetch_url() to use HTTP 2113 * "file:///path" call fetch_url() to copy 2114 * "about:..." print a message 2115 * 2116 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 2117 * is still open (e.g, ftp xfer with trailing /) 2118 */ 2119 static int 2120 go_fetch(const char *url) 2121 { 2122 char *proxyenv; 2123 char *p; 2124 2125 #ifndef NO_ABOUT 2126 /* 2127 * Check for about:* 2128 */ 2129 if (STRNEQUAL(url, ABOUT_URL)) { 2130 url += sizeof(ABOUT_URL) -1; 2131 if (strcasecmp(url, "ftp") == 0 || 2132 strcasecmp(url, "tnftp") == 0) { 2133 fputs( 2134 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 2135 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 2136 } else if (strcasecmp(url, "lukem") == 0) { 2137 fputs( 2138 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 2139 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 2140 } else if (strcasecmp(url, "netbsd") == 0) { 2141 fputs( 2142 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 2143 "For more information, see http://www.NetBSD.org/\n", ttyout); 2144 } else if (strcasecmp(url, "version") == 0) { 2145 fprintf(ttyout, "Version: %s %s%s\n", 2146 FTP_PRODUCT, FTP_VERSION, 2147 #ifdef INET6 2148 "" 2149 #else 2150 " (-IPv6)" 2151 #endif 2152 ); 2153 } else { 2154 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 2155 } 2156 fputs("\n", ttyout); 2157 return (0); 2158 } 2159 #endif 2160 2161 /* 2162 * Check for file:// and http:// URLs. 2163 */ 2164 if (STRNEQUAL(url, HTTP_URL) 2165 #ifdef WITH_SSL 2166 || STRNEQUAL(url, HTTPS_URL) 2167 #endif 2168 || STRNEQUAL(url, FILE_URL)) 2169 return (fetch_url(url, NULL, NULL, NULL)); 2170 2171 /* 2172 * If it contains "://" but does not begin with ftp:// 2173 * or something that was already handled, then it's 2174 * unsupported. 2175 * 2176 * If it contains ":" but not "://" then we assume the 2177 * part before the colon is a host name, not an URL scheme, 2178 * so we don't try to match that here. 2179 */ 2180 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 2181 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 2182 2183 /* 2184 * Try FTP URL-style and host:file arguments next. 2185 * If ftpproxy is set with an FTP URL, use fetch_url() 2186 * Othewise, use fetch_ftp(). 2187 */ 2188 proxyenv = getoptionvalue("ftp_proxy"); 2189 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 2190 return (fetch_url(url, NULL, NULL, NULL)); 2191 2192 return (fetch_ftp(url)); 2193 } 2194 2195 /* 2196 * Retrieve multiple files from the command line, 2197 * calling go_fetch() for each file. 2198 * 2199 * If an ftp path has a trailing "/", the path will be cd-ed into and 2200 * the connection remains open, and the function will return -1 2201 * (to indicate the connection is alive). 2202 * If an error occurs the return value will be the offset+1 in 2203 * argv[] of the file that caused a problem (i.e, argv[x] 2204 * returns x+1) 2205 * Otherwise, 0 is returned if all files retrieved successfully. 2206 */ 2207 int 2208 auto_fetch(int argc, char *argv[]) 2209 { 2210 volatile int argpos, rval; 2211 2212 argpos = rval = 0; 2213 2214 if (sigsetjmp(toplevel, 1)) { 2215 if (connected) 2216 disconnect(0, NULL); 2217 if (rval > 0) 2218 rval = argpos + 1; 2219 return (rval); 2220 } 2221 (void)xsignal(SIGINT, intr); 2222 (void)xsignal(SIGPIPE, lostpeer); 2223 2224 /* 2225 * Loop through as long as there's files to fetch. 2226 */ 2227 for (; (rval == 0) && (argpos < argc); argpos++) { 2228 if (strchr(argv[argpos], ':') == NULL) 2229 break; 2230 redirect_loop = 0; 2231 if (!anonftp) 2232 anonftp = 2; /* Handle "automatic" transfers. */ 2233 rval = go_fetch(argv[argpos]); 2234 if (outfile != NULL && strcmp(outfile, "-") != 0 2235 && outfile[0] != '|') 2236 outfile = NULL; 2237 if (rval > 0) 2238 rval = argpos + 1; 2239 } 2240 2241 if (connected && rval != -1) 2242 disconnect(0, NULL); 2243 return (rval); 2244 } 2245 2246 2247 /* 2248 * Upload multiple files from the command line. 2249 * 2250 * If an error occurs the return value will be the offset+1 in 2251 * argv[] of the file that caused a problem (i.e, argv[x] 2252 * returns x+1) 2253 * Otherwise, 0 is returned if all files uploaded successfully. 2254 */ 2255 int 2256 auto_put(int argc, char **argv, const char *uploadserver) 2257 { 2258 char *uargv[4], *path, *pathsep; 2259 int uargc, rval, argpos; 2260 size_t len; 2261 char cmdbuf[MAX_C_NAME]; 2262 2263 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 2264 uargv[0] = cmdbuf; 2265 uargv[1] = argv[0]; 2266 uargc = 2; 2267 uargv[2] = uargv[3] = NULL; 2268 pathsep = NULL; 2269 rval = 1; 2270 2271 DPRINTF("auto_put: target `%s'\n", uploadserver); 2272 2273 path = ftp_strdup(uploadserver); 2274 len = strlen(path); 2275 if (path[len - 1] != '/' && path[len - 1] != ':') { 2276 /* 2277 * make sure we always pass a directory to auto_fetch 2278 */ 2279 if (argc > 1) { /* more than one file to upload */ 2280 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 2281 free(path); 2282 path = (char *)ftp_malloc(len); 2283 (void)strlcpy(path, uploadserver, len); 2284 (void)strlcat(path, "/", len); 2285 } else { /* single file to upload */ 2286 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 2287 uargv[0] = cmdbuf; 2288 pathsep = strrchr(path, '/'); 2289 if (pathsep == NULL) { 2290 pathsep = strrchr(path, ':'); 2291 if (pathsep == NULL) { 2292 warnx("Invalid URL `%s'", path); 2293 goto cleanup_auto_put; 2294 } 2295 pathsep++; 2296 uargv[2] = ftp_strdup(pathsep); 2297 pathsep[0] = '/'; 2298 } else 2299 uargv[2] = ftp_strdup(pathsep + 1); 2300 pathsep[1] = '\0'; 2301 uargc++; 2302 } 2303 } 2304 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 2305 path, STRorNULL(uargv[2])); 2306 2307 /* connect and cwd */ 2308 rval = auto_fetch(1, &path); 2309 if(rval >= 0) 2310 goto cleanup_auto_put; 2311 2312 rval = 0; 2313 2314 /* target filename provided; upload 1 file */ 2315 /* XXX : is this the best way? */ 2316 if (uargc == 3) { 2317 uargv[1] = argv[0]; 2318 put(uargc, uargv); 2319 if ((code / 100) != COMPLETE) 2320 rval = 1; 2321 } else { /* otherwise a target dir: upload all files to it */ 2322 for(argpos = 0; argv[argpos] != NULL; argpos++) { 2323 uargv[1] = argv[argpos]; 2324 mput(uargc, uargv); 2325 if ((code / 100) != COMPLETE) { 2326 rval = argpos + 1; 2327 break; 2328 } 2329 } 2330 } 2331 2332 cleanup_auto_put: 2333 free(path); 2334 FREEPTR(uargv[2]); 2335 return (rval); 2336 } 2337