1 /* $NetBSD: fetch.c,v 1.220 2016/01/05 11:41:00 wiz 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 1.220 2016/01/05 11:41:00 wiz 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, int *rval, int *ischunked, 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 pauth->auth, wauth->auth); 1125 memset(*authp, 0, strlen(*authp)); 1126 FREEPTR(*authp); 1127 } 1128 goto cleanup_fetch_url; 1129 } 1130 #endif 1131 default: 1132 if (message) 1133 warnx("Error retrieving file `%s'", message); 1134 else 1135 warnx("Unknown error retrieving file"); 1136 goto cleanup_fetch_url; 1137 } 1138 rv = C_OK; 1139 goto out; 1140 1141 cleanup_fetch_url: 1142 rv = C_CLEANUP; 1143 goto out; 1144 improper: 1145 rv = C_IMPROPER; 1146 goto out; 1147 out: 1148 FREEPTR(message); 1149 FREEPTR(location); 1150 return rv; 1151 } /* end of ftp:// or http:// specific setup */ 1152 1153 #ifdef WITH_SSL 1154 static int 1155 connectmethod(int s, FETCH *fin, struct urlinfo *oui, struct urlinfo *ui, 1156 struct authinfo *pauth, char **auth, int *hasleading) 1157 { 1158 void *ssl; 1159 int hcode, rv; 1160 const char *cp; 1161 char buf[FTPBUFLEN], *ep; 1162 char *message = NULL; 1163 1164 print_connect(fin, oui); 1165 1166 print_agent(fin); 1167 *hasleading = print_proxy(fin, *hasleading, NULL, pauth->auth); 1168 1169 if (verbose && *hasleading) 1170 fputs(")\n", ttyout); 1171 *hasleading = 0; 1172 1173 fetch_printf(fin, "\r\n"); 1174 if (fetch_flush(fin) == EOF) { 1175 warn("Writing HTTP request"); 1176 alarmtimer(0); 1177 goto cleanup_fetch_url; 1178 } 1179 alarmtimer(0); 1180 1181 /* Read the response */ 1182 ep = buf; 1183 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1184 case C_CLEANUP: 1185 goto cleanup_fetch_url; 1186 case C_IMPROPER: 1187 goto improper; 1188 case C_OK: 1189 message = ftp_strdup(ep); 1190 break; 1191 } 1192 1193 for (;;) { 1194 int len; 1195 if (getresponseline(fin, buf, sizeof(buf), &len) != C_OK) 1196 goto cleanup_fetch_url; 1197 if (len == 0) 1198 break; 1199 if (match_token(&cp, "Proxy-Authenticate:")) { 1200 const char *token; 1201 if (!(token = match_token(&cp, "Basic"))) { 1202 DPRINTF( 1203 "%s: skipping unknown auth scheme `%s'\n", 1204 __func__, token); 1205 continue; 1206 } 1207 FREEPTR(*auth); 1208 *auth = ftp_strdup(token); 1209 DPRINTF("%s: parsed auth as " "`%s'\n", __func__, cp); 1210 } 1211 } 1212 1213 /* finished parsing header */ 1214 switch (hcode) { 1215 case 200: 1216 break; 1217 default: 1218 if (message) 1219 warnx("Error proxy connect " "`%s'", message); 1220 else 1221 warnx("Unknown error proxy " "connect"); 1222 goto cleanup_fetch_url; 1223 } 1224 1225 if ((ssl = fetch_start_ssl(s, oui->host)) == NULL) 1226 goto cleanup_fetch_url; 1227 fetch_set_ssl(fin, ssl); 1228 1229 rv = C_OK; 1230 goto out; 1231 improper: 1232 rv = C_IMPROPER; 1233 goto out; 1234 cleanup_fetch_url: 1235 rv = C_CLEANUP; 1236 goto out; 1237 out: 1238 FREEPTR(message); 1239 return rv; 1240 } 1241 #endif 1242 1243 /* 1244 * Retrieve URL, via a proxy if necessary, using HTTP. 1245 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 1246 * http_proxy/https_proxy as appropriate. 1247 * Supports HTTP redirects. 1248 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1249 * is still open (e.g, ftp xfer with trailing /) 1250 */ 1251 static int 1252 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 1253 { 1254 sigfunc volatile oldint; 1255 sigfunc volatile oldpipe; 1256 sigfunc volatile oldalrm; 1257 sigfunc volatile oldquit; 1258 int volatile s; 1259 struct stat sb; 1260 int volatile isproxy; 1261 int rval, ischunked; 1262 size_t flen; 1263 static size_t bufsize; 1264 static char *xferbuf; 1265 const char *cp; 1266 char *ep; 1267 char *auth; 1268 char *volatile savefile; 1269 char *volatile location; 1270 char *volatile message; 1271 char *volatile decodedpath; 1272 struct authinfo wauth, pauth; 1273 struct posinfo pi; 1274 off_t hashbytes; 1275 int (*volatile closefunc)(FILE *); 1276 FETCH *volatile fin; 1277 FILE *volatile fout; 1278 const char *volatile penv = proxyenv; 1279 struct urlinfo ui, oui; 1280 time_t mtime; 1281 void *ssl = NULL; 1282 1283 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 1284 1285 oldquit = oldalrm = oldint = oldpipe = NULL; 1286 closefunc = NULL; 1287 fin = NULL; 1288 fout = NULL; 1289 s = -1; 1290 savefile = NULL; 1291 auth = location = message = NULL; 1292 ischunked = isproxy = 0; 1293 rval = 1; 1294 1295 initurlinfo(&ui); 1296 initauthinfo(&wauth, wwwauth); 1297 initauthinfo(&pauth, proxyauth); 1298 1299 decodedpath = NULL; 1300 1301 if (sigsetjmp(httpabort, 1)) 1302 goto cleanup_fetch_url; 1303 1304 if (parse_url(url, "URL", &ui, &wauth) == -1) 1305 goto cleanup_fetch_url; 1306 1307 copyurlinfo(&oui, &ui); 1308 1309 if (ui.utype == FILE_URL_T && ! EMPTYSTRING(ui.host) 1310 && strcasecmp(ui.host, "localhost") != 0) { 1311 warnx("No support for non local file URL `%s'", url); 1312 goto cleanup_fetch_url; 1313 } 1314 1315 if (EMPTYSTRING(ui.path)) { 1316 if (ui.utype == FTP_URL_T) { 1317 rval = fetch_ftp(url); 1318 goto cleanup_fetch_url; 1319 } 1320 if (!IS_HTTP_TYPE(ui.utype) || outfile == NULL) { 1321 warnx("Invalid URL (no file after host) `%s'", url); 1322 goto cleanup_fetch_url; 1323 } 1324 } 1325 1326 decodedpath = ftp_strdup(ui.path); 1327 url_decode(decodedpath); 1328 1329 if (outfile) 1330 savefile = outfile; 1331 else { 1332 cp = strrchr(decodedpath, '/'); /* find savefile */ 1333 if (cp != NULL) 1334 savefile = ftp_strdup(cp + 1); 1335 else 1336 savefile = ftp_strdup(decodedpath); 1337 } 1338 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 1339 if (EMPTYSTRING(savefile)) { 1340 if (ui.utype == FTP_URL_T) { 1341 rval = fetch_ftp(url); 1342 goto cleanup_fetch_url; 1343 } 1344 warnx("No file after directory (you must specify an " 1345 "output file) `%s'", url); 1346 goto cleanup_fetch_url; 1347 } 1348 1349 restart_point = 0; 1350 filesize = -1; 1351 initposinfo(&pi); 1352 mtime = -1; 1353 if (restartautofetch) { 1354 if (stat(savefile, &sb) == 0) 1355 restart_point = sb.st_size; 1356 } 1357 if (ui.utype == FILE_URL_T) { /* file:// URLs */ 1358 direction = "copied"; 1359 fin = fetch_open(decodedpath, "r"); 1360 if (fin == NULL) { 1361 warn("Can't open `%s'", decodedpath); 1362 goto cleanup_fetch_url; 1363 } 1364 if (fstat(fetch_fileno(fin), &sb) == 0) { 1365 mtime = sb.st_mtime; 1366 filesize = sb.st_size; 1367 } 1368 if (restart_point) { 1369 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 1370 warn("Can't seek to restart `%s'", 1371 decodedpath); 1372 goto cleanup_fetch_url; 1373 } 1374 } 1375 if (verbose) { 1376 fprintf(ttyout, "Copying %s", decodedpath); 1377 if (restart_point) 1378 fprintf(ttyout, " (restarting at " LLF ")", 1379 (LLT)restart_point); 1380 fputs("\n", ttyout); 1381 } 1382 if (0 == rcvbuf_size) { 1383 rcvbuf_size = 8 * 1024; /* XXX */ 1384 } 1385 } else { /* ftp:// or http:// URLs */ 1386 int hasleading; 1387 1388 if (penv == NULL) { 1389 #ifdef WITH_SSL 1390 if (ui.utype == HTTPS_URL_T) 1391 penv = getoptionvalue("https_proxy"); 1392 #endif 1393 if (penv == NULL && IS_HTTP_TYPE(ui.utype)) 1394 penv = getoptionvalue("http_proxy"); 1395 else if (ui.utype == FTP_URL_T) 1396 penv = getoptionvalue("ftp_proxy"); 1397 } 1398 direction = "retrieved"; 1399 if (! EMPTYSTRING(penv)) { /* use proxy */ 1400 1401 isproxy = handle_noproxy(ui.host, ui.portnum); 1402 1403 if (isproxy == 0 && ui.utype == FTP_URL_T) { 1404 rval = fetch_ftp(url); 1405 goto cleanup_fetch_url; 1406 } 1407 1408 if (isproxy) { 1409 if (restart_point) { 1410 warnx( 1411 "Can't restart via proxy URL `%s'", 1412 penv); 1413 goto cleanup_fetch_url; 1414 } 1415 if (handle_proxy(url, penv, &ui, &pauth) < 0) 1416 goto cleanup_fetch_url; 1417 } 1418 } /* ! EMPTYSTRING(penv) */ 1419 1420 s = ftp_socket(&ui, &ssl); 1421 if (s < 0) { 1422 warnx("Can't connect to `%s:%s'", ui.host, ui.port); 1423 goto cleanup_fetch_url; 1424 } 1425 1426 oldalrm = xsignal(SIGALRM, timeouthttp); 1427 alarmtimer(quit_time ? quit_time : 60); 1428 fin = fetch_fdopen(s, "r+"); 1429 fetch_set_ssl(fin, ssl); 1430 alarmtimer(0); 1431 1432 alarmtimer(quit_time ? quit_time : 60); 1433 /* 1434 * Construct and send the request. 1435 */ 1436 if (verbose) 1437 fprintf(ttyout, "Requesting %s\n", url); 1438 1439 hasleading = 0; 1440 #ifdef WITH_SSL 1441 if (isproxy && oui.utype == HTTPS_URL_T) { 1442 switch (connectmethod(s, fin, &oui, &ui, &pauth, &auth, 1443 &hasleading)) { 1444 case C_CLEANUP: 1445 goto cleanup_fetch_url; 1446 case C_IMPROPER: 1447 goto improper; 1448 case C_OK: 1449 break; 1450 default: 1451 abort(); 1452 } 1453 } 1454 #endif 1455 1456 hasleading = print_get(fin, hasleading, isproxy, &oui, &ui); 1457 1458 if (flushcache) 1459 print_cache(fin, isproxy); 1460 1461 print_agent(fin); 1462 hasleading = print_proxy(fin, hasleading, wauth.auth, 1463 auth ? NULL : pauth.auth); 1464 if (hasleading) { 1465 hasleading = 0; 1466 if (verbose) 1467 fputs(")\n", ttyout); 1468 } 1469 1470 fetch_printf(fin, "\r\n"); 1471 if (fetch_flush(fin) == EOF) { 1472 warn("Writing HTTP request"); 1473 alarmtimer(0); 1474 goto cleanup_fetch_url; 1475 } 1476 alarmtimer(0); 1477 1478 switch (negotiate_connection(fin, url, penv, &pi, 1479 &mtime, &wauth, &pauth, &rval, &ischunked, &auth)) { 1480 case C_OK: 1481 break; 1482 case C_CLEANUP: 1483 goto cleanup_fetch_url; 1484 case C_IMPROPER: 1485 goto improper; 1486 default: 1487 abort(); 1488 } 1489 } 1490 1491 /* Open the output file. */ 1492 1493 /* 1494 * Only trust filenames with special meaning if they came from 1495 * the command line 1496 */ 1497 if (outfile == savefile) { 1498 if (strcmp(savefile, "-") == 0) { 1499 fout = stdout; 1500 } else if (*savefile == '|') { 1501 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1502 fout = popen(savefile + 1, "w"); 1503 if (fout == NULL) { 1504 warn("Can't execute `%s'", savefile + 1); 1505 goto cleanup_fetch_url; 1506 } 1507 closefunc = pclose; 1508 } 1509 } 1510 if (fout == NULL) { 1511 if ((pi.rangeend != -1 && pi.rangeend <= restart_point) || 1512 (pi.rangestart == -1 && 1513 filesize != -1 && filesize <= restart_point)) { 1514 /* already done */ 1515 if (verbose) 1516 fprintf(ttyout, "already done\n"); 1517 rval = 0; 1518 goto cleanup_fetch_url; 1519 } 1520 if (restart_point && pi.rangestart != -1) { 1521 if (pi.entitylen != -1) 1522 filesize = pi.entitylen; 1523 if (pi.rangestart != restart_point) { 1524 warnx( 1525 "Size of `%s' differs from save file `%s'", 1526 url, savefile); 1527 goto cleanup_fetch_url; 1528 } 1529 fout = fopen(savefile, "a"); 1530 } else 1531 fout = fopen(savefile, "w"); 1532 if (fout == NULL) { 1533 warn("Can't open `%s'", savefile); 1534 goto cleanup_fetch_url; 1535 } 1536 closefunc = fclose; 1537 } 1538 1539 /* Trap signals */ 1540 oldquit = xsignal(SIGQUIT, psummary); 1541 oldint = xsignal(SIGINT, aborthttp); 1542 1543 assert(rcvbuf_size > 0); 1544 if ((size_t)rcvbuf_size > bufsize) { 1545 if (xferbuf) 1546 (void)free(xferbuf); 1547 bufsize = rcvbuf_size; 1548 xferbuf = ftp_malloc(bufsize); 1549 } 1550 1551 bytes = 0; 1552 hashbytes = mark; 1553 if (oldalrm) { 1554 (void)xsignal(SIGALRM, oldalrm); 1555 oldalrm = NULL; 1556 } 1557 progressmeter(-1); 1558 1559 /* Finally, suck down the file. */ 1560 do { 1561 long chunksize; 1562 short lastchunk; 1563 1564 chunksize = 0; 1565 lastchunk = 0; 1566 /* read chunk-size */ 1567 if (ischunked) { 1568 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1569 warnx("Unexpected EOF reading chunk-size"); 1570 goto cleanup_fetch_url; 1571 } 1572 errno = 0; 1573 chunksize = strtol(xferbuf, &ep, 16); 1574 if (ep == xferbuf) { 1575 warnx("Invalid chunk-size"); 1576 goto cleanup_fetch_url; 1577 } 1578 if (errno == ERANGE || chunksize < 0) { 1579 errno = ERANGE; 1580 warn("Chunk-size `%.*s'", 1581 (int)(ep-xferbuf), xferbuf); 1582 goto cleanup_fetch_url; 1583 } 1584 1585 /* 1586 * XXX: Work around bug in Apache 1.3.9 and 1587 * 1.3.11, which incorrectly put trailing 1588 * space after the chunk-size. 1589 */ 1590 while (*ep == ' ') 1591 ep++; 1592 1593 /* skip [ chunk-ext ] */ 1594 if (*ep == ';') { 1595 while (*ep && *ep != '\r') 1596 ep++; 1597 } 1598 1599 if (strcmp(ep, "\r\n") != 0) { 1600 warnx("Unexpected data following chunk-size"); 1601 goto cleanup_fetch_url; 1602 } 1603 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1604 (LLT)chunksize); 1605 if (chunksize == 0) { 1606 lastchunk = 1; 1607 goto chunkdone; 1608 } 1609 } 1610 /* transfer file or chunk */ 1611 while (1) { 1612 struct timeval then, now, td; 1613 volatile off_t bufrem; 1614 1615 if (rate_get) 1616 (void)gettimeofday(&then, NULL); 1617 bufrem = rate_get ? rate_get : (off_t)bufsize; 1618 if (ischunked) 1619 bufrem = MIN(chunksize, bufrem); 1620 while (bufrem > 0) { 1621 flen = fetch_read(xferbuf, sizeof(char), 1622 MIN((off_t)bufsize, bufrem), fin); 1623 if (flen <= 0) 1624 goto chunkdone; 1625 bytes += flen; 1626 bufrem -= flen; 1627 if (fwrite(xferbuf, sizeof(char), flen, fout) 1628 != flen) { 1629 warn("Writing `%s'", savefile); 1630 goto cleanup_fetch_url; 1631 } 1632 if (hash && !progress) { 1633 while (bytes >= hashbytes) { 1634 (void)putc('#', ttyout); 1635 hashbytes += mark; 1636 } 1637 (void)fflush(ttyout); 1638 } 1639 if (ischunked) { 1640 chunksize -= flen; 1641 if (chunksize <= 0) 1642 break; 1643 } 1644 } 1645 if (rate_get) { 1646 while (1) { 1647 (void)gettimeofday(&now, NULL); 1648 timersub(&now, &then, &td); 1649 if (td.tv_sec > 0) 1650 break; 1651 usleep(1000000 - td.tv_usec); 1652 } 1653 } 1654 if (ischunked && chunksize <= 0) 1655 break; 1656 } 1657 /* read CRLF after chunk*/ 1658 chunkdone: 1659 if (ischunked) { 1660 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1661 alarmtimer(0); 1662 warnx("Unexpected EOF reading chunk CRLF"); 1663 goto cleanup_fetch_url; 1664 } 1665 if (strcmp(xferbuf, "\r\n") != 0) { 1666 warnx("Unexpected data following chunk"); 1667 goto cleanup_fetch_url; 1668 } 1669 if (lastchunk) 1670 break; 1671 } 1672 } while (ischunked); 1673 1674 /* XXX: deal with optional trailer & CRLF here? */ 1675 1676 if (hash && !progress && bytes > 0) { 1677 if (bytes < mark) 1678 (void)putc('#', ttyout); 1679 (void)putc('\n', ttyout); 1680 } 1681 if (fetch_error(fin)) { 1682 warn("Reading file"); 1683 goto cleanup_fetch_url; 1684 } 1685 progressmeter(1); 1686 (void)fflush(fout); 1687 if (closefunc == fclose && mtime != -1) { 1688 struct timeval tval[2]; 1689 1690 (void)gettimeofday(&tval[0], NULL); 1691 tval[1].tv_sec = mtime; 1692 tval[1].tv_usec = 0; 1693 (*closefunc)(fout); 1694 fout = NULL; 1695 1696 if (utimes(savefile, tval) == -1) { 1697 fprintf(ttyout, 1698 "Can't change modification time to %s", 1699 rfc2822time(localtime(&mtime))); 1700 } 1701 } 1702 if (bytes > 0) 1703 ptransfer(0); 1704 bytes = 0; 1705 1706 rval = 0; 1707 goto cleanup_fetch_url; 1708 1709 improper: 1710 warnx("Improper response from `%s:%s'", ui.host, ui.port); 1711 1712 cleanup_fetch_url: 1713 if (oldint) 1714 (void)xsignal(SIGINT, oldint); 1715 if (oldpipe) 1716 (void)xsignal(SIGPIPE, oldpipe); 1717 if (oldalrm) 1718 (void)xsignal(SIGALRM, oldalrm); 1719 if (oldquit) 1720 (void)xsignal(SIGQUIT, oldpipe); 1721 if (fin != NULL) 1722 fetch_close(fin); 1723 else if (s != -1) 1724 close(s); 1725 if (closefunc != NULL && fout != NULL) 1726 (*closefunc)(fout); 1727 if (savefile != outfile) 1728 FREEPTR(savefile); 1729 freeurlinfo(&ui); 1730 freeurlinfo(&oui); 1731 freeauthinfo(&wauth); 1732 freeauthinfo(&pauth); 1733 FREEPTR(decodedpath); 1734 FREEPTR(auth); 1735 FREEPTR(location); 1736 FREEPTR(message); 1737 return (rval); 1738 } 1739 1740 /* 1741 * Abort a HTTP retrieval 1742 */ 1743 static void 1744 aborthttp(int notused) 1745 { 1746 char msgbuf[100]; 1747 int len; 1748 1749 sigint_raised = 1; 1750 alarmtimer(0); 1751 if (fromatty) { 1752 len = snprintf(msgbuf, sizeof(msgbuf), 1753 "\n%s: HTTP fetch aborted.\n", getprogname()); 1754 if (len > 0) 1755 write(fileno(ttyout), msgbuf, len); 1756 } 1757 siglongjmp(httpabort, 1); 1758 } 1759 1760 static void 1761 timeouthttp(int notused) 1762 { 1763 char msgbuf[100]; 1764 int len; 1765 1766 alarmtimer(0); 1767 if (fromatty) { 1768 len = snprintf(msgbuf, sizeof(msgbuf), 1769 "\n%s: HTTP fetch timeout.\n", getprogname()); 1770 if (len > 0) 1771 write(fileno(ttyout), msgbuf, len); 1772 } 1773 siglongjmp(httpabort, 1); 1774 } 1775 1776 /* 1777 * Retrieve ftp URL or classic ftp argument using FTP. 1778 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1779 * is still open (e.g, ftp xfer with trailing /) 1780 */ 1781 static int 1782 fetch_ftp(const char *url) 1783 { 1784 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1785 char *dir, *file; 1786 char cmdbuf[MAXPATHLEN]; 1787 char dirbuf[4]; 1788 int dirhasglob, filehasglob, rval, transtype, xargc; 1789 int oanonftp, oautologin; 1790 struct authinfo auth; 1791 struct urlinfo ui; 1792 1793 DPRINTF("fetch_ftp: `%s'\n", url); 1794 dir = file = NULL; 1795 rval = 1; 1796 transtype = TYPE_I; 1797 1798 initurlinfo(&ui); 1799 initauthinfo(&auth, NULL); 1800 1801 if (STRNEQUAL(url, FTP_URL)) { 1802 if ((parse_url(url, "URL", &ui, &auth) == -1) || 1803 (auth.user != NULL && *auth.user == '\0') || 1804 EMPTYSTRING(ui.host)) { 1805 warnx("Invalid URL `%s'", url); 1806 goto cleanup_fetch_ftp; 1807 } 1808 /* 1809 * Note: Don't url_decode(path) here. We need to keep the 1810 * distinction between "/" and "%2F" until later. 1811 */ 1812 1813 /* check for trailing ';type=[aid]' */ 1814 if (! EMPTYSTRING(ui.path) && (cp = strrchr(ui.path, ';')) != NULL) { 1815 if (strcasecmp(cp, ";type=a") == 0) 1816 transtype = TYPE_A; 1817 else if (strcasecmp(cp, ";type=i") == 0) 1818 transtype = TYPE_I; 1819 else if (strcasecmp(cp, ";type=d") == 0) { 1820 warnx( 1821 "Directory listing via a URL is not supported"); 1822 goto cleanup_fetch_ftp; 1823 } else { 1824 warnx("Invalid suffix `%s' in URL `%s'", cp, 1825 url); 1826 goto cleanup_fetch_ftp; 1827 } 1828 *cp = 0; 1829 } 1830 } else { /* classic style `[user@]host:[file]' */ 1831 ui.utype = CLASSIC_URL_T; 1832 ui.host = ftp_strdup(url); 1833 cp = strchr(ui.host, '@'); 1834 if (cp != NULL) { 1835 *cp = '\0'; 1836 auth.user = ui.host; 1837 anonftp = 0; /* disable anonftp */ 1838 ui.host = ftp_strdup(cp + 1); 1839 } 1840 cp = strchr(ui.host, ':'); 1841 if (cp != NULL) { 1842 *cp = '\0'; 1843 ui.path = ftp_strdup(cp + 1); 1844 } 1845 } 1846 if (EMPTYSTRING(ui.host)) 1847 goto cleanup_fetch_ftp; 1848 1849 /* Extract the file and (if present) directory name. */ 1850 dir = ui.path; 1851 if (! EMPTYSTRING(dir)) { 1852 /* 1853 * If we are dealing with classic `[user@]host:[path]' syntax, 1854 * then a path of the form `/file' (resulting from input of the 1855 * form `host:/file') means that we should do "CWD /" before 1856 * retrieving the file. So we set dir="/" and file="file". 1857 * 1858 * But if we are dealing with URLs like `ftp://host/path' then 1859 * a path of the form `/file' (resulting from a URL of the form 1860 * `ftp://host//file') means that we should do `CWD ' (with an 1861 * empty argument) before retrieving the file. So we set 1862 * dir="" and file="file". 1863 * 1864 * If the path does not contain / at all, we set dir=NULL. 1865 * (We get a path without any slashes if we are dealing with 1866 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1867 * 1868 * In all other cases, we set dir to a string that does not 1869 * include the final '/' that separates the dir part from the 1870 * file part of the path. (This will be the empty string if 1871 * and only if we are dealing with a path of the form `/file' 1872 * resulting from an URL of the form `ftp://host//file'.) 1873 */ 1874 cp = strrchr(dir, '/'); 1875 if (cp == dir && ui.utype == CLASSIC_URL_T) { 1876 file = cp + 1; 1877 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1878 dir = dirbuf; 1879 } else if (cp != NULL) { 1880 *cp++ = '\0'; 1881 file = cp; 1882 } else { 1883 file = dir; 1884 dir = NULL; 1885 } 1886 } else 1887 dir = NULL; 1888 if (ui.utype == FTP_URL_T && file != NULL) { 1889 url_decode(file); 1890 /* but still don't url_decode(dir) */ 1891 } 1892 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1893 "path `%s' dir `%s' file `%s'\n", 1894 STRorNULL(auth.user), STRorNULL(auth.pass), 1895 STRorNULL(ui.host), STRorNULL(ui.port), 1896 STRorNULL(ui.path), STRorNULL(dir), STRorNULL(file)); 1897 1898 dirhasglob = filehasglob = 0; 1899 if (doglob && ui.utype == CLASSIC_URL_T) { 1900 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1901 dirhasglob = 1; 1902 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1903 filehasglob = 1; 1904 } 1905 1906 /* Set up the connection */ 1907 oanonftp = anonftp; 1908 if (connected) 1909 disconnect(0, NULL); 1910 anonftp = oanonftp; 1911 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1912 xargv[0] = cmdbuf; 1913 xargv[1] = ui.host; 1914 xargv[2] = NULL; 1915 xargc = 2; 1916 if (ui.port) { 1917 xargv[2] = ui.port; 1918 xargv[3] = NULL; 1919 xargc = 3; 1920 } 1921 oautologin = autologin; 1922 /* don't autologin in setpeer(), use ftp_login() below */ 1923 autologin = 0; 1924 setpeer(xargc, xargv); 1925 autologin = oautologin; 1926 if ((connected == 0) || 1927 (connected == 1 && !ftp_login(ui.host, auth.user, auth.pass))) { 1928 warnx("Can't connect or login to host `%s:%s'", 1929 ui.host, ui.port ? ui.port : "?"); 1930 goto cleanup_fetch_ftp; 1931 } 1932 1933 switch (transtype) { 1934 case TYPE_A: 1935 setascii(1, xargv); 1936 break; 1937 case TYPE_I: 1938 setbinary(1, xargv); 1939 break; 1940 default: 1941 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 1942 } 1943 1944 /* 1945 * Change directories, if necessary. 1946 * 1947 * Note: don't use EMPTYSTRING(dir) below, because 1948 * dir=="" means something different from dir==NULL. 1949 */ 1950 if (dir != NULL && !dirhasglob) { 1951 char *nextpart; 1952 1953 /* 1954 * If we are dealing with a classic `[user@]host:[path]' 1955 * (urltype is CLASSIC_URL_T) then we have a raw directory 1956 * name (not encoded in any way) and we can change 1957 * directories in one step. 1958 * 1959 * If we are dealing with an `ftp://host/path' URL 1960 * (urltype is FTP_URL_T), then RFC 3986 says we need to 1961 * send a separate CWD command for each unescaped "/" 1962 * in the path, and we have to interpret %hex escaping 1963 * *after* we find the slashes. It's possible to get 1964 * empty components here, (from multiple adjacent 1965 * slashes in the path) and RFC 3986 says that we should 1966 * still do `CWD ' (with a null argument) in such cases. 1967 * 1968 * Many ftp servers don't support `CWD ', so if there's an 1969 * error performing that command, bail out with a descriptive 1970 * message. 1971 * 1972 * Examples: 1973 * 1974 * host: dir="", urltype=CLASSIC_URL_T 1975 * logged in (to default directory) 1976 * host:file dir=NULL, urltype=CLASSIC_URL_T 1977 * "RETR file" 1978 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 1979 * "CWD dir", logged in 1980 * ftp://host/ dir="", urltype=FTP_URL_T 1981 * logged in (to default directory) 1982 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 1983 * "CWD dir", logged in 1984 * ftp://host/file dir=NULL, urltype=FTP_URL_T 1985 * "RETR file" 1986 * ftp://host//file dir="", urltype=FTP_URL_T 1987 * "CWD ", "RETR file" 1988 * host:/file dir="/", urltype=CLASSIC_URL_T 1989 * "CWD /", "RETR file" 1990 * ftp://host///file dir="/", urltype=FTP_URL_T 1991 * "CWD ", "CWD ", "RETR file" 1992 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 1993 * "CWD /", "RETR file" 1994 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 1995 * "CWD foo", "RETR file" 1996 * ftp://host/foo/bar/file dir="foo/bar" 1997 * "CWD foo", "CWD bar", "RETR file" 1998 * ftp://host//foo/bar/file dir="/foo/bar" 1999 * "CWD ", "CWD foo", "CWD bar", "RETR file" 2000 * ftp://host/foo//bar/file dir="foo//bar" 2001 * "CWD foo", "CWD ", "CWD bar", "RETR file" 2002 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 2003 * "CWD /", "CWD foo", "CWD bar", "RETR file" 2004 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 2005 * "CWD /foo", "CWD bar", "RETR file" 2006 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 2007 * "CWD /foo/bar", "RETR file" 2008 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 2009 * "RETR /foo/bar/file" 2010 * 2011 * Note that we don't need `dir' after this point. 2012 */ 2013 do { 2014 if (ui.utype == FTP_URL_T) { 2015 nextpart = strchr(dir, '/'); 2016 if (nextpart) { 2017 *nextpart = '\0'; 2018 nextpart++; 2019 } 2020 url_decode(dir); 2021 } else 2022 nextpart = NULL; 2023 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 2024 STRorNULL(dir), STRorNULL(nextpart)); 2025 if (ui.utype == FTP_URL_T || *dir != '\0') { 2026 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 2027 xargv[0] = cmdbuf; 2028 xargv[1] = dir; 2029 xargv[2] = NULL; 2030 dirchange = 0; 2031 cd(2, xargv); 2032 if (! dirchange) { 2033 if (*dir == '\0' && code == 500) 2034 fprintf(stderr, 2035 "\n" 2036 "ftp: The `CWD ' command (without a directory), which is required by\n" 2037 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 2038 " conflicts with the server's conformance to RFC 959.\n" 2039 " Try the same URL without the `//' in the URL pathname.\n" 2040 "\n"); 2041 goto cleanup_fetch_ftp; 2042 } 2043 } 2044 dir = nextpart; 2045 } while (dir != NULL); 2046 } 2047 2048 if (EMPTYSTRING(file)) { 2049 rval = -1; 2050 goto cleanup_fetch_ftp; 2051 } 2052 2053 if (dirhasglob) { 2054 (void)strlcpy(rempath, dir, sizeof(rempath)); 2055 (void)strlcat(rempath, "/", sizeof(rempath)); 2056 (void)strlcat(rempath, file, sizeof(rempath)); 2057 file = rempath; 2058 } 2059 2060 /* Fetch the file(s). */ 2061 xargc = 2; 2062 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 2063 xargv[0] = cmdbuf; 2064 xargv[1] = file; 2065 xargv[2] = NULL; 2066 if (dirhasglob || filehasglob) { 2067 int ointeractive; 2068 2069 ointeractive = interactive; 2070 interactive = 0; 2071 if (restartautofetch) 2072 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 2073 else 2074 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 2075 xargv[0] = cmdbuf; 2076 mget(xargc, xargv); 2077 interactive = ointeractive; 2078 } else { 2079 if (outfile == NULL) { 2080 cp = strrchr(file, '/'); /* find savefile */ 2081 if (cp != NULL) 2082 outfile = cp + 1; 2083 else 2084 outfile = file; 2085 } 2086 xargv[2] = (char *)outfile; 2087 xargv[3] = NULL; 2088 xargc++; 2089 if (restartautofetch) 2090 reget(xargc, xargv); 2091 else 2092 get(xargc, xargv); 2093 } 2094 2095 if ((code / 100) == COMPLETE) 2096 rval = 0; 2097 2098 cleanup_fetch_ftp: 2099 freeurlinfo(&ui); 2100 freeauthinfo(&auth); 2101 return (rval); 2102 } 2103 2104 /* 2105 * Retrieve the given file to outfile. 2106 * Supports arguments of the form: 2107 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 2108 * call fetch_ftp() 2109 * "http://host/path" call fetch_url() to use HTTP 2110 * "file:///path" call fetch_url() to copy 2111 * "about:..." print a message 2112 * 2113 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 2114 * is still open (e.g, ftp xfer with trailing /) 2115 */ 2116 static int 2117 go_fetch(const char *url) 2118 { 2119 char *proxyenv; 2120 char *p; 2121 2122 #ifndef NO_ABOUT 2123 /* 2124 * Check for about:* 2125 */ 2126 if (STRNEQUAL(url, ABOUT_URL)) { 2127 url += sizeof(ABOUT_URL) -1; 2128 if (strcasecmp(url, "ftp") == 0 || 2129 strcasecmp(url, "tnftp") == 0) { 2130 fputs( 2131 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 2132 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 2133 } else if (strcasecmp(url, "lukem") == 0) { 2134 fputs( 2135 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 2136 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 2137 } else if (strcasecmp(url, "netbsd") == 0) { 2138 fputs( 2139 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 2140 "For more information, see http://www.NetBSD.org/\n", ttyout); 2141 } else if (strcasecmp(url, "version") == 0) { 2142 fprintf(ttyout, "Version: %s %s%s\n", 2143 FTP_PRODUCT, FTP_VERSION, 2144 #ifdef INET6 2145 "" 2146 #else 2147 " (-IPv6)" 2148 #endif 2149 ); 2150 } else { 2151 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 2152 } 2153 fputs("\n", ttyout); 2154 return (0); 2155 } 2156 #endif 2157 2158 /* 2159 * Check for file:// and http:// URLs. 2160 */ 2161 if (STRNEQUAL(url, HTTP_URL) 2162 #ifdef WITH_SSL 2163 || STRNEQUAL(url, HTTPS_URL) 2164 #endif 2165 || STRNEQUAL(url, FILE_URL)) 2166 return (fetch_url(url, NULL, NULL, NULL)); 2167 2168 /* 2169 * If it contains "://" but does not begin with ftp:// 2170 * or something that was already handled, then it's 2171 * unsupported. 2172 * 2173 * If it contains ":" but not "://" then we assume the 2174 * part before the colon is a host name, not an URL scheme, 2175 * so we don't try to match that here. 2176 */ 2177 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 2178 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 2179 2180 /* 2181 * Try FTP URL-style and host:file arguments next. 2182 * If ftpproxy is set with an FTP URL, use fetch_url() 2183 * Othewise, use fetch_ftp(). 2184 */ 2185 proxyenv = getoptionvalue("ftp_proxy"); 2186 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 2187 return (fetch_url(url, NULL, NULL, NULL)); 2188 2189 return (fetch_ftp(url)); 2190 } 2191 2192 /* 2193 * Retrieve multiple files from the command line, 2194 * calling go_fetch() for each file. 2195 * 2196 * If an ftp path has a trailing "/", the path will be cd-ed into and 2197 * the connection remains open, and the function will return -1 2198 * (to indicate the connection is alive). 2199 * If an error occurs the return value will be the offset+1 in 2200 * argv[] of the file that caused a problem (i.e, argv[x] 2201 * returns x+1) 2202 * Otherwise, 0 is returned if all files retrieved successfully. 2203 */ 2204 int 2205 auto_fetch(int argc, char *argv[]) 2206 { 2207 volatile int argpos, rval; 2208 2209 argpos = rval = 0; 2210 2211 if (sigsetjmp(toplevel, 1)) { 2212 if (connected) 2213 disconnect(0, NULL); 2214 if (rval > 0) 2215 rval = argpos + 1; 2216 return (rval); 2217 } 2218 (void)xsignal(SIGINT, intr); 2219 (void)xsignal(SIGPIPE, lostpeer); 2220 2221 /* 2222 * Loop through as long as there's files to fetch. 2223 */ 2224 for (; (rval == 0) && (argpos < argc); argpos++) { 2225 if (strchr(argv[argpos], ':') == NULL) 2226 break; 2227 redirect_loop = 0; 2228 if (!anonftp) 2229 anonftp = 2; /* Handle "automatic" transfers. */ 2230 rval = go_fetch(argv[argpos]); 2231 if (outfile != NULL && strcmp(outfile, "-") != 0 2232 && outfile[0] != '|') 2233 outfile = NULL; 2234 if (rval > 0) 2235 rval = argpos + 1; 2236 } 2237 2238 if (connected && rval != -1) 2239 disconnect(0, NULL); 2240 return (rval); 2241 } 2242 2243 2244 /* 2245 * Upload multiple files from the command line. 2246 * 2247 * If an error occurs the return value will be the offset+1 in 2248 * argv[] of the file that caused a problem (i.e, argv[x] 2249 * returns x+1) 2250 * Otherwise, 0 is returned if all files uploaded successfully. 2251 */ 2252 int 2253 auto_put(int argc, char **argv, const char *uploadserver) 2254 { 2255 char *uargv[4], *path, *pathsep; 2256 int uargc, rval, argpos; 2257 size_t len; 2258 char cmdbuf[MAX_C_NAME]; 2259 2260 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 2261 uargv[0] = cmdbuf; 2262 uargv[1] = argv[0]; 2263 uargc = 2; 2264 uargv[2] = uargv[3] = NULL; 2265 pathsep = NULL; 2266 rval = 1; 2267 2268 DPRINTF("auto_put: target `%s'\n", uploadserver); 2269 2270 path = ftp_strdup(uploadserver); 2271 len = strlen(path); 2272 if (path[len - 1] != '/' && path[len - 1] != ':') { 2273 /* 2274 * make sure we always pass a directory to auto_fetch 2275 */ 2276 if (argc > 1) { /* more than one file to upload */ 2277 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 2278 free(path); 2279 path = (char *)ftp_malloc(len); 2280 (void)strlcpy(path, uploadserver, len); 2281 (void)strlcat(path, "/", len); 2282 } else { /* single file to upload */ 2283 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 2284 uargv[0] = cmdbuf; 2285 pathsep = strrchr(path, '/'); 2286 if (pathsep == NULL) { 2287 pathsep = strrchr(path, ':'); 2288 if (pathsep == NULL) { 2289 warnx("Invalid URL `%s'", path); 2290 goto cleanup_auto_put; 2291 } 2292 pathsep++; 2293 uargv[2] = ftp_strdup(pathsep); 2294 pathsep[0] = '/'; 2295 } else 2296 uargv[2] = ftp_strdup(pathsep + 1); 2297 pathsep[1] = '\0'; 2298 uargc++; 2299 } 2300 } 2301 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 2302 path, STRorNULL(uargv[2])); 2303 2304 /* connect and cwd */ 2305 rval = auto_fetch(1, &path); 2306 if(rval >= 0) 2307 goto cleanup_auto_put; 2308 2309 rval = 0; 2310 2311 /* target filename provided; upload 1 file */ 2312 /* XXX : is this the best way? */ 2313 if (uargc == 3) { 2314 uargv[1] = argv[0]; 2315 put(uargc, uargv); 2316 if ((code / 100) != COMPLETE) 2317 rval = 1; 2318 } else { /* otherwise a target dir: upload all files to it */ 2319 for(argpos = 0; argv[argpos] != NULL; argpos++) { 2320 uargv[1] = argv[argpos]; 2321 mput(uargc, uargv); 2322 if ((code / 100) != COMPLETE) { 2323 rval = argpos + 1; 2324 break; 2325 } 2326 } 2327 } 2328 2329 cleanup_auto_put: 2330 free(path); 2331 FREEPTR(uargv[2]); 2332 return (rval); 2333 } 2334