1 /* $NetBSD: fetch.c,v 1.234 2021/08/01 15:29:30 andvar 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 1.234 2021/08/01 15:29:30 andvar 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 * fwrite(3) replacement that just uses write(2). Many stdio implementations 143 * don't handle interrupts properly and corrupt the output. We are taking 144 * alarm interrupts because of the progress bar. 145 * 146 * Assumes `fp' is pristine with no prior I/O calls on it. 147 */ 148 static size_t 149 maxwrite(const void *buf, size_t size, size_t nmemb, FILE *fp) 150 { 151 const char *p = buf; 152 ssize_t nwr = 0; 153 ssize_t n; 154 int fd = fileno(fp); 155 156 size *= nmemb; /* assume no overflow */ 157 158 while (size > 0) { 159 if ((n = write(fd, p, size)) == -1) { 160 switch (errno) { 161 case EINTR: 162 case EAGAIN: 163 #if defined(EWOULDBLOCK) && EWOULDBLOCK != EAGAIN 164 case EWOULDBLOCK: 165 #endif 166 continue; 167 default: 168 return nwr; 169 } 170 } 171 p += n; 172 nwr += n; 173 size -= n; 174 } 175 return nwr; 176 } 177 178 /* 179 * Determine if token is the next word in buf (case insensitive). 180 * If so, advance buf past the token and any trailing LWS, and 181 * return a pointer to the token (in buf). Otherwise, return NULL. 182 * token may be preceded by LWS. 183 * token must be followed by LWS or NUL. (I.e, don't partial match). 184 */ 185 static const char * 186 match_token(const char **buf, const char *token) 187 { 188 const char *p, *orig; 189 size_t tlen; 190 191 tlen = strlen(token); 192 p = *buf; 193 SKIPLWS(p); 194 orig = p; 195 if (strncasecmp(p, token, tlen) != 0) 196 return NULL; 197 p += tlen; 198 if (*p != '\0' && !ISLWS(*p)) 199 return NULL; 200 SKIPLWS(p); 201 orig = *buf; 202 *buf = p; 203 return orig; 204 } 205 206 static void 207 initposinfo(struct posinfo *pi) 208 { 209 pi->rangestart = pi->rangeend = pi->entitylen = -1; 210 } 211 212 static void 213 initauthinfo(struct authinfo *ai, char *auth) 214 { 215 ai->auth = auth; 216 ai->user = ai->pass = 0; 217 } 218 219 static void 220 freeauthinfo(struct authinfo *a) 221 { 222 FREEPTR(a->user); 223 if (a->pass != NULL) 224 memset(a->pass, 0, strlen(a->pass)); 225 FREEPTR(a->pass); 226 } 227 228 static void 229 initurlinfo(struct urlinfo *ui) 230 { 231 ui->host = ui->port = ui->path = 0; 232 ui->utype = UNKNOWN_URL_T; 233 ui->portnum = 0; 234 } 235 236 static void 237 copyurlinfo(struct urlinfo *dui, struct urlinfo *sui) 238 { 239 dui->host = ftp_strdup(sui->host); 240 dui->port = ftp_strdup(sui->port); 241 dui->path = ftp_strdup(sui->path); 242 dui->utype = sui->utype; 243 dui->portnum = sui->portnum; 244 } 245 246 static void 247 freeurlinfo(struct urlinfo *ui) 248 { 249 FREEPTR(ui->host); 250 FREEPTR(ui->port); 251 FREEPTR(ui->path); 252 } 253 254 #ifndef NO_AUTH 255 /* 256 * Generate authorization response based on given authentication challenge. 257 * Returns -1 if an error occurred, otherwise 0. 258 * Sets response to a malloc(3)ed string; caller should free. 259 */ 260 static int 261 auth_url(const char *challenge, char **response, const struct authinfo *auth) 262 { 263 const char *cp, *scheme, *errormsg; 264 char *ep, *clear, *realm; 265 char uuser[BUFSIZ], *gotpass; 266 const char *upass; 267 int rval; 268 size_t len, clen, rlen; 269 270 *response = NULL; 271 clear = realm = NULL; 272 rval = -1; 273 cp = challenge; 274 scheme = "Basic"; /* only support Basic authentication */ 275 gotpass = NULL; 276 277 DPRINTF("auth_url: challenge `%s'\n", challenge); 278 279 if (! match_token(&cp, scheme)) { 280 warnx("Unsupported authentication challenge `%s'", 281 challenge); 282 goto cleanup_auth_url; 283 } 284 285 #define REALM "realm=\"" 286 if (STRNEQUAL(cp, REALM)) 287 cp += sizeof(REALM) - 1; 288 else { 289 warnx("Unsupported authentication challenge `%s'", 290 challenge); 291 goto cleanup_auth_url; 292 } 293 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */ 294 if ((ep = strchr(cp, '\"')) != NULL) { 295 len = ep - cp; 296 realm = (char *)ftp_malloc(len + 1); 297 (void)strlcpy(realm, cp, len + 1); 298 } else { 299 warnx("Unsupported authentication challenge `%s'", 300 challenge); 301 goto cleanup_auth_url; 302 } 303 304 fprintf(ttyout, "Username for `%s': ", realm); 305 if (auth->user != NULL) { 306 (void)strlcpy(uuser, auth->user, sizeof(uuser)); 307 fprintf(ttyout, "%s\n", uuser); 308 } else { 309 (void)fflush(ttyout); 310 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) { 311 warnx("%s; can't authenticate", errormsg); 312 goto cleanup_auth_url; 313 } 314 } 315 if (auth->pass != NULL) 316 upass = auth->pass; 317 else { 318 gotpass = getpass("Password: "); 319 if (gotpass == NULL) { 320 warnx("Can't read password"); 321 goto cleanup_auth_url; 322 } 323 upass = gotpass; 324 } 325 326 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */ 327 clear = (char *)ftp_malloc(clen); 328 (void)strlcpy(clear, uuser, clen); 329 (void)strlcat(clear, ":", clen); 330 (void)strlcat(clear, upass, clen); 331 if (gotpass) 332 memset(gotpass, 0, strlen(gotpass)); 333 334 /* scheme + " " + enc + "\0" */ 335 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1; 336 *response = ftp_malloc(rlen); 337 (void)strlcpy(*response, scheme, rlen); 338 len = strlcat(*response, " ", rlen); 339 /* use `clen - 1' to not encode the trailing NUL */ 340 base64_encode((unsigned char *)clear, clen - 1, 341 (unsigned char *)*response + len); 342 memset(clear, 0, clen); 343 rval = 0; 344 345 cleanup_auth_url: 346 FREEPTR(clear); 347 FREEPTR(realm); 348 return (rval); 349 } 350 351 /* 352 * Encode len bytes starting at clear using base64 encoding into encoded, 353 * which should be at least ((len + 2) * 4 / 3 + 1) in size. 354 */ 355 static void 356 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded) 357 { 358 static const unsigned char enc[] = 359 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; 360 unsigned char *cp; 361 size_t i; 362 363 cp = encoded; 364 for (i = 0; i < len; i += 3) { 365 *(cp++) = enc[((clear[i + 0] >> 2))]; 366 *(cp++) = enc[((clear[i + 0] << 4) & 0x30) 367 | ((clear[i + 1] >> 4) & 0x0f)]; 368 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c) 369 | ((clear[i + 2] >> 6) & 0x03)]; 370 *(cp++) = enc[((clear[i + 2] ) & 0x3f)]; 371 } 372 *cp = '\0'; 373 while (i-- > len) 374 *(--cp) = '='; 375 } 376 #endif 377 378 /* 379 * Decode %xx escapes in given string, `in-place'. 380 */ 381 static void 382 url_decode(char *url) 383 { 384 unsigned char *p, *q; 385 386 if (EMPTYSTRING(url)) 387 return; 388 p = q = (unsigned char *)url; 389 390 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10)) 391 while (*p) { 392 if (p[0] == '%' 393 && p[1] && isxdigit((unsigned char)p[1]) 394 && p[2] && isxdigit((unsigned char)p[2])) { 395 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]); 396 p+=3; 397 } else 398 *q++ = *p++; 399 } 400 *q = '\0'; 401 } 402 403 404 /* 405 * Parse URL of form (per RFC 3986): 406 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>] 407 * Returns -1 if a parse error occurred, otherwise 0. 408 * It's the caller's responsibility to url_decode() the returned 409 * user, pass and path. 410 * 411 * Sets type to url_t, each of the given char ** pointers to a 412 * malloc(3)ed strings of the relevant section, and port to 413 * the number given, or ftpport if ftp://, or httpport if http://. 414 * 415 * XXX: this is not totally RFC 3986 compliant; <path> will have the 416 * leading `/' unless it's an ftp:// URL, as this makes things easier 417 * for file:// and http:// URLs. ftp:// URLs have the `/' between the 418 * host and the URL-path removed, but any additional leading slashes 419 * in the URL-path are retained (because they imply that we should 420 * later do "CWD" with a null argument). 421 * 422 * Examples: 423 * input URL output path 424 * --------- ----------- 425 * "http://host" "/" 426 * "http://host/" "/" 427 * "http://host/path" "/path" 428 * "file://host/dir/file" "dir/file" 429 * "ftp://host" "" 430 * "ftp://host/" "" 431 * "ftp://host//" "/" 432 * "ftp://host/dir/file" "dir/file" 433 * "ftp://host//dir/file" "/dir/file" 434 */ 435 436 static int 437 parse_url(const char *url, const char *desc, struct urlinfo *ui, 438 struct authinfo *auth) 439 { 440 const char *origurl, *tport; 441 char *cp, *ep, *thost; 442 size_t len; 443 444 if (url == NULL || desc == NULL || ui == NULL || auth == NULL) 445 errx(1, "parse_url: invoked with NULL argument!"); 446 DPRINTF("parse_url: %s `%s'\n", desc, url); 447 448 origurl = url; 449 tport = NULL; 450 451 if (STRNEQUAL(url, HTTP_URL)) { 452 url += sizeof(HTTP_URL) - 1; 453 ui->utype = HTTP_URL_T; 454 ui->portnum = HTTP_PORT; 455 tport = httpport; 456 } else if (STRNEQUAL(url, FTP_URL)) { 457 url += sizeof(FTP_URL) - 1; 458 ui->utype = FTP_URL_T; 459 ui->portnum = FTP_PORT; 460 tport = ftpport; 461 } else if (STRNEQUAL(url, FILE_URL)) { 462 url += sizeof(FILE_URL) - 1; 463 ui->utype = FILE_URL_T; 464 tport = ""; 465 #ifdef WITH_SSL 466 } else if (STRNEQUAL(url, HTTPS_URL)) { 467 url += sizeof(HTTPS_URL) - 1; 468 ui->utype = HTTPS_URL_T; 469 ui->portnum = HTTPS_PORT; 470 tport = httpsport; 471 #endif 472 } else { 473 warnx("Invalid %s `%s'", desc, url); 474 cleanup_parse_url: 475 freeauthinfo(auth); 476 freeurlinfo(ui); 477 return (-1); 478 } 479 480 if (*url == '\0') 481 return (0); 482 483 /* find [user[:pass]@]host[:port] */ 484 ep = strchr(url, '/'); 485 if (ep == NULL) 486 thost = ftp_strdup(url); 487 else { 488 len = ep - url; 489 thost = (char *)ftp_malloc(len + 1); 490 (void)strlcpy(thost, url, len + 1); 491 if (ui->utype == FTP_URL_T) /* skip first / for ftp URLs */ 492 ep++; 493 ui->path = ftp_strdup(ep); 494 } 495 496 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */ 497 if (cp != NULL) { 498 if (ui->utype == FTP_URL_T) 499 anonftp = 0; /* disable anonftp */ 500 auth->user = thost; 501 *cp = '\0'; 502 thost = ftp_strdup(cp + 1); 503 cp = strchr(auth->user, ':'); 504 if (cp != NULL) { 505 *cp = '\0'; 506 auth->pass = ftp_strdup(cp + 1); 507 } 508 url_decode(auth->user); 509 if (auth->pass) 510 url_decode(auth->pass); 511 } 512 513 #ifdef INET6 514 /* 515 * Check if thost is an encoded IPv6 address, as per 516 * RFC 3986: 517 * `[' ipv6-address ']' 518 */ 519 if (*thost == '[') { 520 cp = thost + 1; 521 if ((ep = strchr(cp, ']')) == NULL || 522 (ep[1] != '\0' && ep[1] != ':')) { 523 warnx("Invalid address `%s' in %s `%s'", 524 thost, desc, origurl); 525 goto cleanup_parse_url; 526 } 527 len = ep - cp; /* change `[xyz]' -> `xyz' */ 528 memmove(thost, thost + 1, len); 529 thost[len] = '\0'; 530 if (! isipv6addr(thost)) { 531 warnx("Invalid IPv6 address `%s' in %s `%s'", 532 thost, desc, origurl); 533 goto cleanup_parse_url; 534 } 535 cp = ep + 1; 536 if (*cp == ':') 537 cp++; 538 else 539 cp = NULL; 540 } else 541 #endif /* INET6 */ 542 if ((cp = strchr(thost, ':')) != NULL) 543 *cp++ = '\0'; 544 ui->host = thost; 545 546 /* look for [:port] */ 547 if (cp != NULL) { 548 unsigned long nport; 549 550 nport = strtoul(cp, &ep, 10); 551 if (*cp == '\0' || *ep != '\0' || 552 nport < 1 || nport > MAX_IN_PORT_T) { 553 warnx("Unknown port `%s' in %s `%s'", 554 cp, desc, origurl); 555 goto cleanup_parse_url; 556 } 557 ui->portnum = nport; 558 tport = cp; 559 } 560 561 if (tport != NULL) 562 ui->port = ftp_strdup(tport); 563 if (ui->path == NULL) { 564 const char *emptypath = "/"; 565 if (ui->utype == FTP_URL_T) /* skip first / for ftp URLs */ 566 emptypath++; 567 ui->path = ftp_strdup(emptypath); 568 } 569 570 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) " 571 "path `%s'\n", 572 STRorNULL(auth->user), STRorNULL(auth->pass), 573 STRorNULL(ui->host), STRorNULL(ui->port), 574 ui->portnum ? ui->portnum : -1, STRorNULL(ui->path)); 575 576 return (0); 577 } 578 579 sigjmp_buf httpabort; 580 581 static int 582 ftp_socket(const struct urlinfo *ui, void **ssl) 583 { 584 struct addrinfo hints, *res, *res0 = NULL; 585 int error; 586 int s; 587 const char *host = ui->host; 588 const char *port = ui->port; 589 590 if (ui->utype != HTTPS_URL_T) 591 ssl = NULL; 592 593 memset(&hints, 0, sizeof(hints)); 594 hints.ai_flags = 0; 595 hints.ai_family = family; 596 hints.ai_socktype = SOCK_STREAM; 597 hints.ai_protocol = 0; 598 599 error = getaddrinfo(host, port, &hints, &res0); 600 if (error) { 601 warnx("Can't LOOKUP `%s:%s': %s", host, port, 602 (error == EAI_SYSTEM) ? strerror(errno) 603 : gai_strerror(error)); 604 return -1; 605 } 606 607 if (res0->ai_canonname) 608 host = res0->ai_canonname; 609 610 s = -1; 611 if (ssl) 612 *ssl = NULL; 613 for (res = res0; res; res = res->ai_next) { 614 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 615 616 ai_unmapped(res); 617 if (getnameinfo(res->ai_addr, res->ai_addrlen, 618 hname, sizeof(hname), sname, sizeof(sname), 619 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 620 strlcpy(hname, "?", sizeof(hname)); 621 strlcpy(sname, "?", sizeof(sname)); 622 } 623 624 if (verbose && res0->ai_next) { 625 #ifdef INET6 626 if(res->ai_family == AF_INET6) { 627 fprintf(ttyout, "Trying [%s]:%s ...\n", 628 hname, sname); 629 } else { 630 #endif 631 fprintf(ttyout, "Trying %s:%s ...\n", 632 hname, sname); 633 #ifdef INET6 634 } 635 #endif 636 } 637 638 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 639 if (s < 0) { 640 warn( 641 "Can't create socket for connection to " 642 "`%s:%s'", hname, sname); 643 continue; 644 } 645 646 if (ftp_connect(s, res->ai_addr, res->ai_addrlen, 647 verbose || !res->ai_next) < 0) { 648 close(s); 649 s = -1; 650 continue; 651 } 652 653 #ifdef WITH_SSL 654 if (ssl) { 655 if ((*ssl = fetch_start_ssl(s, host)) == NULL) { 656 close(s); 657 s = -1; 658 continue; 659 } 660 } 661 #endif 662 break; 663 } 664 if (res0) 665 freeaddrinfo(res0); 666 return s; 667 } 668 669 static int 670 handle_noproxy(const char *host, in_port_t portnum) 671 { 672 673 char *cp, *ep, *np, *np_copy, *np_iter, *no_proxy; 674 unsigned long np_port; 675 size_t hlen, plen; 676 int isproxy = 1; 677 678 /* check URL against list of no_proxied sites */ 679 no_proxy = getoptionvalue("no_proxy"); 680 if (EMPTYSTRING(no_proxy)) 681 return isproxy; 682 683 np_iter = np_copy = ftp_strdup(no_proxy); 684 hlen = strlen(host); 685 while ((cp = strsep(&np_iter, " ,")) != NULL) { 686 if (*cp == '\0') 687 continue; 688 if ((np = strrchr(cp, ':')) != NULL) { 689 *np++ = '\0'; 690 np_port = strtoul(np, &ep, 10); 691 if (*np == '\0' || *ep != '\0') 692 continue; 693 if (np_port != portnum) 694 continue; 695 } 696 plen = strlen(cp); 697 if (hlen < plen) 698 continue; 699 if (strncasecmp(host + hlen - plen, cp, plen) == 0) { 700 isproxy = 0; 701 break; 702 } 703 } 704 FREEPTR(np_copy); 705 return isproxy; 706 } 707 708 static int 709 handle_proxy(const char *url, const char *penv, struct urlinfo *ui, 710 struct authinfo *pauth) 711 { 712 struct urlinfo pui; 713 714 if (isipv6addr(ui->host) && strchr(ui->host, '%') != NULL) { 715 warnx("Scoped address notation `%s' disallowed via web proxy", 716 ui->host); 717 return -1; 718 } 719 720 initurlinfo(&pui); 721 if (parse_url(penv, "proxy URL", &pui, pauth) == -1) 722 return -1; 723 724 if ((!IS_HTTP_TYPE(pui.utype) && pui.utype != FTP_URL_T) || 725 EMPTYSTRING(pui.host) || 726 (! EMPTYSTRING(pui.path) && strcmp(pui.path, "/") != 0)) { 727 warnx("Malformed proxy URL `%s'", penv); 728 freeurlinfo(&pui); 729 return -1; 730 } 731 732 FREEPTR(pui.path); 733 pui.path = ftp_strdup(url); 734 735 freeurlinfo(ui); 736 *ui = pui; 737 738 return 0; 739 } 740 741 static void 742 print_host(FETCH *fin, const struct urlinfo *ui) 743 { 744 char *h, *p; 745 746 if (strchr(ui->host, ':') == NULL) { 747 fetch_printf(fin, "Host: %s", ui->host); 748 } else { 749 /* 750 * strip off IPv6 scope identifier, since it is 751 * local to the node 752 */ 753 h = ftp_strdup(ui->host); 754 if (isipv6addr(h) && (p = strchr(h, '%')) != NULL) 755 *p = '\0'; 756 757 fetch_printf(fin, "Host: [%s]", h); 758 free(h); 759 } 760 761 if ((ui->utype == HTTP_URL_T && ui->portnum != HTTP_PORT) || 762 (ui->utype == HTTPS_URL_T && ui->portnum != HTTPS_PORT)) 763 fetch_printf(fin, ":%u", ui->portnum); 764 fetch_printf(fin, "\r\n"); 765 } 766 767 static void 768 print_agent(FETCH *fin) 769 { 770 const char *useragent; 771 if ((useragent = getenv("FTPUSERAGENT")) != NULL) { 772 fetch_printf(fin, "User-Agent: %s\r\n", useragent); 773 } else { 774 fetch_printf(fin, "User-Agent: %s/%s\r\n", 775 FTP_PRODUCT, FTP_VERSION); 776 } 777 } 778 779 static void 780 print_cache(FETCH *fin, int isproxy) 781 { 782 fetch_printf(fin, isproxy ? 783 "Pragma: no-cache\r\n" : 784 "Cache-Control: no-cache\r\n"); 785 } 786 787 static int 788 print_get(FETCH *fin, int hasleading, int isproxy, const struct urlinfo *oui, 789 const struct urlinfo *ui) 790 { 791 const char *leading = hasleading ? ", " : " ("; 792 793 if (isproxy) { 794 if (verbose) { 795 fprintf(ttyout, "%svia %s:%u", leading, 796 ui->host, ui->portnum); 797 leading = ", "; 798 hasleading++; 799 } 800 fetch_printf(fin, "GET %s HTTP/1.0\r\n", ui->path); 801 print_host(fin, oui); 802 return hasleading; 803 } 804 805 fetch_printf(fin, "GET %s HTTP/1.1\r\n", ui->path); 806 print_host(fin, ui); 807 fetch_printf(fin, "Accept: */*\r\n"); 808 fetch_printf(fin, "Connection: close\r\n"); 809 if (restart_point) { 810 fputs(leading, ttyout); 811 fetch_printf(fin, "Range: bytes=" LLF "-\r\n", 812 (LLT)restart_point); 813 fprintf(ttyout, "restarting at " LLF, (LLT)restart_point); 814 hasleading++; 815 } 816 return hasleading; 817 } 818 819 static void 820 getmtime(const char *cp, time_t *mtime) 821 { 822 struct tm parsed; 823 const char *t; 824 825 memset(&parsed, 0, sizeof(parsed)); 826 t = parse_rfc2616time(&parsed, cp); 827 828 if (t == NULL) 829 return; 830 831 parsed.tm_isdst = -1; 832 if (*t == '\0') 833 *mtime = timegm(&parsed); 834 835 #ifndef NO_DEBUG 836 if (ftp_debug && *mtime != -1) { 837 fprintf(ttyout, "parsed time as: %s", 838 rfc2822time(localtime(mtime))); 839 } 840 #endif 841 } 842 843 static int 844 print_proxy(FETCH *fin, int hasleading, const char *wwwauth, 845 const char *proxyauth) 846 { 847 const char *leading = hasleading ? ", " : " ("; 848 849 if (wwwauth) { 850 if (verbose) { 851 fprintf(ttyout, "%swith authorization", leading); 852 hasleading++; 853 } 854 fetch_printf(fin, "Authorization: %s\r\n", wwwauth); 855 } 856 if (proxyauth) { 857 if (verbose) { 858 fprintf(ttyout, "%swith proxy authorization", leading); 859 hasleading++; 860 } 861 fetch_printf(fin, "Proxy-Authorization: %s\r\n", proxyauth); 862 } 863 return hasleading; 864 } 865 866 #ifdef WITH_SSL 867 static void 868 print_connect(FETCH *fin, const struct urlinfo *ui) 869 { 870 char hname[NI_MAXHOST], *p; 871 const char *h; 872 873 if (isipv6addr(ui->host)) { 874 /* 875 * strip off IPv6 scope identifier, 876 * since it is local to the node 877 */ 878 if ((p = strchr(ui->host, '%')) == NULL) 879 snprintf(hname, sizeof(hname), "[%s]", ui->host); 880 else 881 snprintf(hname, sizeof(hname), "[%.*s]", 882 (int)(p - ui->host), ui->host); 883 h = hname; 884 } else 885 h = ui->host; 886 887 fetch_printf(fin, "CONNECT %s:%d HTTP/1.1\r\n", h, ui->portnum); 888 fetch_printf(fin, "Host: %s:%d\r\n", h, ui->portnum); 889 } 890 #endif 891 892 #define C_OK 0 893 #define C_CLEANUP 1 894 #define C_IMPROPER 2 895 896 static int 897 getresponseline(FETCH *fin, char *buf, size_t buflen, int *len) 898 { 899 const char *errormsg; 900 901 alarmtimer(quit_time ? quit_time : 60); 902 *len = fetch_getline(fin, buf, buflen, &errormsg); 903 alarmtimer(0); 904 if (*len < 0) { 905 if (*errormsg == '\n') 906 errormsg++; 907 warnx("Receiving HTTP reply: %s", errormsg); 908 return C_CLEANUP; 909 } 910 while (*len > 0 && (ISLWS(buf[*len-1]))) 911 buf[--*len] = '\0'; 912 913 if (*len) 914 DPRINTF("%s: received `%s'\n", __func__, buf); 915 return C_OK; 916 } 917 918 static int 919 getresponse(FETCH *fin, char **cp, size_t buflen, int *hcode) 920 { 921 int len, rv; 922 char *ep, *buf = *cp; 923 924 *hcode = 0; 925 if ((rv = getresponseline(fin, buf, buflen, &len)) != C_OK) 926 return rv; 927 928 /* Determine HTTP response code */ 929 *cp = strchr(buf, ' '); 930 if (*cp == NULL) 931 return C_IMPROPER; 932 933 (*cp)++; 934 935 *hcode = strtol(*cp, &ep, 10); 936 if (*ep != '\0' && !isspace((unsigned char)*ep)) 937 return C_IMPROPER; 938 939 return C_OK; 940 } 941 942 static int 943 parse_posinfo(const char **cp, struct posinfo *pi) 944 { 945 char *ep; 946 if (!match_token(cp, "bytes")) 947 return -1; 948 949 if (**cp == '*') 950 (*cp)++; 951 else { 952 pi->rangestart = STRTOLL(*cp, &ep, 10); 953 if (pi->rangestart < 0 || *ep != '-') 954 return -1; 955 *cp = ep + 1; 956 pi->rangeend = STRTOLL(*cp, &ep, 10); 957 if (pi->rangeend < 0 || pi->rangeend < pi->rangestart) 958 return -1; 959 *cp = ep; 960 } 961 if (**cp != '/') 962 return -1; 963 (*cp)++; 964 if (**cp == '*') 965 (*cp)++; 966 else { 967 pi->entitylen = STRTOLL(*cp, &ep, 10); 968 if (pi->entitylen < 0) 969 return -1; 970 *cp = ep; 971 } 972 if (**cp != '\0') 973 return -1; 974 975 #ifndef NO_DEBUG 976 if (ftp_debug) { 977 fprintf(ttyout, "parsed range as: "); 978 if (pi->rangestart == -1) 979 fprintf(ttyout, "*"); 980 else 981 fprintf(ttyout, LLF "-" LLF, (LLT)pi->rangestart, 982 (LLT)pi->rangeend); 983 fprintf(ttyout, "/" LLF "\n", (LLT)pi->entitylen); 984 } 985 #endif 986 return 0; 987 } 988 989 #ifndef NO_AUTH 990 static void 991 do_auth(int hcode, const char *url, const char *penv, struct authinfo *wauth, 992 struct authinfo *pauth, char **auth, const char *message, 993 volatile int *rval) 994 { 995 struct authinfo aauth; 996 char *response; 997 998 if (hcode == 401) 999 aauth = *wauth; 1000 else 1001 aauth = *pauth; 1002 1003 if (verbose || aauth.auth == NULL || 1004 aauth.user == NULL || aauth.pass == NULL) 1005 fprintf(ttyout, "%s\n", message); 1006 if (EMPTYSTRING(*auth)) { 1007 warnx("No authentication challenge provided by server"); 1008 return; 1009 } 1010 1011 if (aauth.auth != NULL) { 1012 char reply[10]; 1013 1014 fprintf(ttyout, "Authorization failed. Retry (y/n)? "); 1015 if (get_line(stdin, reply, sizeof(reply), NULL) < 0) { 1016 return; 1017 } 1018 if (tolower((unsigned char)reply[0]) != 'y') 1019 return; 1020 1021 aauth.user = NULL; 1022 aauth.pass = NULL; 1023 } 1024 1025 if (auth_url(*auth, &response, &aauth) == 0) { 1026 *rval = fetch_url(url, penv, 1027 hcode == 401 ? pauth->auth : response, 1028 hcode == 401 ? response: wauth->auth); 1029 memset(response, 0, strlen(response)); 1030 FREEPTR(response); 1031 } 1032 } 1033 #endif 1034 1035 static int 1036 negotiate_connection(FETCH *fin, const char *url, const char *penv, 1037 struct posinfo *pi, time_t *mtime, struct authinfo *wauth, 1038 struct authinfo *pauth, volatile int *rval, volatile int *ischunked, 1039 char **auth) 1040 { 1041 int len, hcode, rv; 1042 char buf[FTPBUFLEN], *ep; 1043 const char *cp, *token; 1044 char *location, *message; 1045 1046 *auth = message = location = NULL; 1047 1048 /* Read the response */ 1049 ep = buf; 1050 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1051 case C_CLEANUP: 1052 goto cleanup_fetch_url; 1053 case C_IMPROPER: 1054 goto improper; 1055 case C_OK: 1056 message = ftp_strdup(ep); 1057 break; 1058 } 1059 1060 /* Read the rest of the header. */ 1061 1062 for (;;) { 1063 if ((rv = getresponseline(fin, buf, sizeof(buf), &len)) != C_OK) 1064 goto cleanup_fetch_url; 1065 if (len == 0) 1066 break; 1067 1068 /* 1069 * Look for some headers 1070 */ 1071 1072 cp = buf; 1073 1074 if (match_token(&cp, "Content-Length:")) { 1075 filesize = STRTOLL(cp, &ep, 10); 1076 if (filesize < 0 || *ep != '\0') 1077 goto improper; 1078 DPRINTF("%s: parsed len as: " LLF "\n", 1079 __func__, (LLT)filesize); 1080 1081 } else if (match_token(&cp, "Content-Range:")) { 1082 if (parse_posinfo(&cp, pi) == -1) 1083 goto improper; 1084 if (! restart_point) { 1085 warnx( 1086 "Received unexpected Content-Range header"); 1087 goto cleanup_fetch_url; 1088 } 1089 1090 } else if (match_token(&cp, "Last-Modified:")) { 1091 getmtime(cp, mtime); 1092 1093 } else if (match_token(&cp, "Location:")) { 1094 location = ftp_strdup(cp); 1095 DPRINTF("%s: parsed location as `%s'\n", 1096 __func__, cp); 1097 1098 } else if (match_token(&cp, "Transfer-Encoding:")) { 1099 if (match_token(&cp, "binary")) { 1100 warnx( 1101 "Bogus transfer encoding `binary' (fetching anyway)"); 1102 continue; 1103 } 1104 if (! (token = match_token(&cp, "chunked"))) { 1105 warnx( 1106 "Unsupported transfer encoding `%s'", 1107 token); 1108 goto cleanup_fetch_url; 1109 } 1110 (*ischunked)++; 1111 DPRINTF("%s: using chunked encoding\n", 1112 __func__); 1113 1114 } else if (match_token(&cp, "Proxy-Authenticate:") 1115 || match_token(&cp, "WWW-Authenticate:")) { 1116 if (! (token = match_token(&cp, "Basic"))) { 1117 DPRINTF("%s: skipping unknown auth " 1118 "scheme `%s'\n", __func__, token); 1119 continue; 1120 } 1121 FREEPTR(*auth); 1122 *auth = ftp_strdup(token); 1123 DPRINTF("%s: parsed auth as `%s'\n", 1124 __func__, cp); 1125 } 1126 1127 } 1128 /* finished parsing header */ 1129 1130 switch (hcode) { 1131 case 200: 1132 break; 1133 case 206: 1134 if (! restart_point) { 1135 warnx("Not expecting partial content header"); 1136 goto cleanup_fetch_url; 1137 } 1138 break; 1139 case 300: 1140 case 301: 1141 case 302: 1142 case 303: 1143 case 305: 1144 case 307: 1145 if (EMPTYSTRING(location)) { 1146 warnx( 1147 "No redirection Location provided by server"); 1148 goto cleanup_fetch_url; 1149 } 1150 if (redirect_loop++ > 5) { 1151 warnx("Too many redirections requested"); 1152 goto cleanup_fetch_url; 1153 } 1154 if (hcode == 305) { 1155 if (verbose) 1156 fprintf(ttyout, "Redirected via %s\n", 1157 location); 1158 *rval = fetch_url(url, location, 1159 pauth->auth, wauth->auth); 1160 } else { 1161 if (verbose) 1162 fprintf(ttyout, "Redirected to %s\n", 1163 location); 1164 *rval = go_fetch(location); 1165 } 1166 goto cleanup_fetch_url; 1167 #ifndef NO_AUTH 1168 case 401: 1169 case 407: 1170 do_auth(hcode, url, penv, wauth, pauth, auth, message, rval); 1171 goto cleanup_fetch_url; 1172 #endif 1173 default: 1174 if (message) 1175 warnx("Error retrieving file `%s'", message); 1176 else 1177 warnx("Unknown error retrieving file"); 1178 goto cleanup_fetch_url; 1179 } 1180 rv = C_OK; 1181 goto out; 1182 1183 cleanup_fetch_url: 1184 rv = C_CLEANUP; 1185 goto out; 1186 improper: 1187 rv = C_IMPROPER; 1188 goto out; 1189 out: 1190 FREEPTR(message); 1191 FREEPTR(location); 1192 return rv; 1193 } /* end of ftp:// or http:// specific setup */ 1194 1195 #ifdef WITH_SSL 1196 static int 1197 connectmethod(FETCH *fin, const char *url, const char *penv, 1198 struct urlinfo *oui, struct urlinfo *ui, struct authinfo *wauth, 1199 struct authinfo *pauth, char **auth, int *hasleading, volatile int *rval) 1200 { 1201 void *ssl; 1202 int hcode, rv; 1203 const char *cp; 1204 char buf[FTPBUFLEN], *ep; 1205 char *message = NULL; 1206 1207 print_connect(fin, oui); 1208 1209 print_agent(fin); 1210 *hasleading = print_proxy(fin, *hasleading, NULL, pauth->auth); 1211 1212 if (verbose && *hasleading) 1213 fputs(")\n", ttyout); 1214 *hasleading = 0; 1215 1216 fetch_printf(fin, "\r\n"); 1217 if (fetch_flush(fin) == EOF) { 1218 warn("Writing HTTP request"); 1219 alarmtimer(0); 1220 goto cleanup_fetch_url; 1221 } 1222 alarmtimer(0); 1223 1224 /* Read the response */ 1225 ep = buf; 1226 switch (getresponse(fin, &ep, sizeof(buf), &hcode)) { 1227 case C_CLEANUP: 1228 goto cleanup_fetch_url; 1229 case C_IMPROPER: 1230 goto improper; 1231 case C_OK: 1232 message = ftp_strdup(ep); 1233 break; 1234 } 1235 1236 for (;;) { 1237 int len; 1238 if (getresponseline(fin, buf, sizeof(buf), &len) != C_OK) 1239 goto cleanup_fetch_url; 1240 if (len == 0) 1241 break; 1242 1243 cp = buf; 1244 if (match_token(&cp, "Proxy-Authenticate:")) { 1245 const char *token; 1246 if (!(token = match_token(&cp, "Basic"))) { 1247 DPRINTF( 1248 "%s: skipping unknown auth scheme `%s'\n", 1249 __func__, token); 1250 continue; 1251 } 1252 FREEPTR(*auth); 1253 *auth = ftp_strdup(token); 1254 DPRINTF("%s: parsed auth as " "`%s'\n", __func__, cp); 1255 } 1256 } 1257 1258 /* finished parsing header */ 1259 switch (hcode) { 1260 case 200: 1261 break; 1262 #ifndef NO_AUTH 1263 case 407: 1264 do_auth(hcode, url, penv, wauth, pauth, auth, message, rval); 1265 goto cleanup_fetch_url; 1266 #endif 1267 default: 1268 if (message) 1269 warnx("Error proxy connect " "`%s'", message); 1270 else 1271 warnx("Unknown error proxy " "connect"); 1272 goto cleanup_fetch_url; 1273 } 1274 1275 if ((ssl = fetch_start_ssl(fetch_fileno(fin), oui->host)) == NULL) 1276 goto cleanup_fetch_url; 1277 fetch_set_ssl(fin, ssl); 1278 1279 rv = C_OK; 1280 goto out; 1281 improper: 1282 rv = C_IMPROPER; 1283 goto out; 1284 cleanup_fetch_url: 1285 rv = C_CLEANUP; 1286 goto out; 1287 out: 1288 FREEPTR(message); 1289 return rv; 1290 } 1291 #endif 1292 1293 /* 1294 * Retrieve URL, via a proxy if necessary, using HTTP. 1295 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or 1296 * http_proxy/https_proxy as appropriate. 1297 * Supports HTTP redirects. 1298 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1299 * is still open (e.g, ftp xfer with trailing /) 1300 */ 1301 static int 1302 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth) 1303 { 1304 sigfunc volatile oldint; 1305 sigfunc volatile oldpipe; 1306 sigfunc volatile oldalrm; 1307 sigfunc volatile oldquit; 1308 int volatile s; 1309 struct stat sb; 1310 int volatile isproxy; 1311 int volatile rval, ischunked; 1312 size_t flen; 1313 static size_t bufsize; 1314 static char *xferbuf; 1315 const char *cp; 1316 char *ep; 1317 char *volatile auth; 1318 char *volatile savefile; 1319 char *volatile location; 1320 char *volatile message; 1321 char *volatile decodedpath; 1322 struct authinfo wauth, pauth; 1323 struct posinfo pi; 1324 off_t hashbytes; 1325 int (*volatile closefunc)(FILE *); 1326 FETCH *volatile fin; 1327 FILE *volatile fout; 1328 const char *volatile penv = proxyenv; 1329 struct urlinfo ui, oui; 1330 time_t mtime; 1331 void *ssl = NULL; 1332 1333 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv)); 1334 1335 oldquit = oldalrm = oldint = oldpipe = SIG_ERR; 1336 closefunc = NULL; 1337 fin = NULL; 1338 fout = NULL; 1339 s = -1; 1340 savefile = NULL; 1341 auth = location = message = NULL; 1342 ischunked = isproxy = 0; 1343 rval = 1; 1344 1345 initurlinfo(&ui); 1346 initurlinfo(&oui); 1347 initauthinfo(&wauth, wwwauth); 1348 initauthinfo(&pauth, proxyauth); 1349 1350 decodedpath = NULL; 1351 1352 if (sigsetjmp(httpabort, 1)) 1353 goto cleanup_fetch_url; 1354 1355 if (parse_url(url, "URL", &ui, &wauth) == -1) 1356 goto cleanup_fetch_url; 1357 1358 copyurlinfo(&oui, &ui); 1359 1360 if (ui.utype == FILE_URL_T && ! EMPTYSTRING(ui.host) 1361 && strcasecmp(ui.host, "localhost") != 0) { 1362 warnx("No support for non local file URL `%s'", url); 1363 goto cleanup_fetch_url; 1364 } 1365 1366 if (EMPTYSTRING(ui.path)) { 1367 if (ui.utype == FTP_URL_T) { 1368 rval = fetch_ftp(url); 1369 goto cleanup_fetch_url; 1370 } 1371 if (!IS_HTTP_TYPE(ui.utype) || outfile == NULL) { 1372 warnx("Invalid URL (no file after host) `%s'", url); 1373 goto cleanup_fetch_url; 1374 } 1375 } 1376 1377 decodedpath = ftp_strdup(ui.path); 1378 url_decode(decodedpath); 1379 1380 if (outfile) 1381 savefile = outfile; 1382 else { 1383 cp = strrchr(decodedpath, '/'); /* find savefile */ 1384 if (cp != NULL) 1385 savefile = ftp_strdup(cp + 1); 1386 else 1387 savefile = ftp_strdup(decodedpath); 1388 /* 1389 * Use the first URL we requested not the name after a 1390 * possible redirect, but careful to save it because our 1391 * "safety" check is the match to outfile. 1392 */ 1393 outfile = ftp_strdup(savefile); 1394 } 1395 DPRINTF("%s: savefile `%s'\n", __func__, savefile); 1396 if (EMPTYSTRING(savefile)) { 1397 if (ui.utype == FTP_URL_T) { 1398 rval = fetch_ftp(url); 1399 goto cleanup_fetch_url; 1400 } 1401 warnx("No file after directory (you must specify an " 1402 "output file) `%s'", url); 1403 goto cleanup_fetch_url; 1404 } 1405 1406 restart_point = 0; 1407 filesize = -1; 1408 initposinfo(&pi); 1409 mtime = -1; 1410 if (restartautofetch) { 1411 if (stat(savefile, &sb) == 0) 1412 restart_point = sb.st_size; 1413 } 1414 if (ui.utype == FILE_URL_T) { /* file:// URLs */ 1415 direction = "copied"; 1416 fin = fetch_open(decodedpath, "r"); 1417 if (fin == NULL) { 1418 warn("Can't open `%s'", decodedpath); 1419 goto cleanup_fetch_url; 1420 } 1421 if (fstat(fetch_fileno(fin), &sb) == 0) { 1422 mtime = sb.st_mtime; 1423 filesize = sb.st_size; 1424 } 1425 if (restart_point) { 1426 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) { 1427 warn("Can't seek to restart `%s'", 1428 decodedpath); 1429 goto cleanup_fetch_url; 1430 } 1431 } 1432 if (verbose) { 1433 fprintf(ttyout, "Copying %s", decodedpath); 1434 if (restart_point) 1435 fprintf(ttyout, " (restarting at " LLF ")", 1436 (LLT)restart_point); 1437 fputs("\n", ttyout); 1438 } 1439 if (0 == rcvbuf_size) { 1440 rcvbuf_size = 8 * 1024; /* XXX */ 1441 } 1442 } else { /* ftp:// or http:// URLs */ 1443 int hasleading; 1444 1445 if (penv == NULL) { 1446 #ifdef WITH_SSL 1447 if (ui.utype == HTTPS_URL_T) 1448 penv = getoptionvalue("https_proxy"); 1449 #endif 1450 if (penv == NULL && IS_HTTP_TYPE(ui.utype)) 1451 penv = getoptionvalue("http_proxy"); 1452 else if (ui.utype == FTP_URL_T) 1453 penv = getoptionvalue("ftp_proxy"); 1454 } 1455 direction = "retrieved"; 1456 if (! EMPTYSTRING(penv)) { /* use proxy */ 1457 1458 isproxy = handle_noproxy(ui.host, ui.portnum); 1459 1460 if (isproxy == 0 && ui.utype == FTP_URL_T) { 1461 rval = fetch_ftp(url); 1462 goto cleanup_fetch_url; 1463 } 1464 1465 if (isproxy) { 1466 if (restart_point) { 1467 warnx( 1468 "Can't restart via proxy URL `%s'", 1469 penv); 1470 goto cleanup_fetch_url; 1471 } 1472 if (handle_proxy(url, penv, &ui, &pauth) < 0) 1473 goto cleanup_fetch_url; 1474 } 1475 } /* ! EMPTYSTRING(penv) */ 1476 1477 s = ftp_socket(&ui, &ssl); 1478 if (s < 0) { 1479 warnx("Can't connect to `%s:%s'", ui.host, ui.port); 1480 goto cleanup_fetch_url; 1481 } 1482 1483 oldalrm = xsignal(SIGALRM, timeouthttp); 1484 alarmtimer(quit_time ? quit_time : 60); 1485 fin = fetch_fdopen(s, "r+"); 1486 fetch_set_ssl(fin, ssl); 1487 alarmtimer(0); 1488 1489 alarmtimer(quit_time ? quit_time : 60); 1490 /* 1491 * Construct and send the request. 1492 */ 1493 if (verbose) 1494 fprintf(ttyout, "Requesting %s\n", url); 1495 1496 hasleading = 0; 1497 #ifdef WITH_SSL 1498 if (isproxy && oui.utype == HTTPS_URL_T) { 1499 switch (connectmethod(fin, url, penv, &oui, &ui, 1500 &wauth, &pauth, __UNVOLATILE(&auth), &hasleading, 1501 &rval)) { 1502 case C_CLEANUP: 1503 goto cleanup_fetch_url; 1504 case C_IMPROPER: 1505 goto improper; 1506 case C_OK: 1507 break; 1508 default: 1509 abort(); 1510 } 1511 } 1512 #endif 1513 1514 hasleading = print_get(fin, hasleading, isproxy, &oui, &ui); 1515 1516 if (flushcache) 1517 print_cache(fin, isproxy); 1518 1519 print_agent(fin); 1520 hasleading = print_proxy(fin, hasleading, wauth.auth, 1521 auth ? NULL : pauth.auth); 1522 if (hasleading) { 1523 hasleading = 0; 1524 if (verbose) 1525 fputs(")\n", ttyout); 1526 } 1527 1528 fetch_printf(fin, "\r\n"); 1529 if (fetch_flush(fin) == EOF) { 1530 warn("Writing HTTP request"); 1531 alarmtimer(0); 1532 goto cleanup_fetch_url; 1533 } 1534 alarmtimer(0); 1535 1536 switch (negotiate_connection(fin, url, penv, &pi, 1537 &mtime, &wauth, &pauth, &rval, &ischunked, 1538 __UNVOLATILE(&auth))) { 1539 case C_OK: 1540 break; 1541 case C_CLEANUP: 1542 goto cleanup_fetch_url; 1543 case C_IMPROPER: 1544 goto improper; 1545 default: 1546 abort(); 1547 } 1548 } 1549 1550 /* Open the output file. */ 1551 1552 /* 1553 * Only trust filenames with special meaning if they came from 1554 * the command line 1555 */ 1556 if (outfile == savefile) { 1557 if (strcmp(savefile, "-") == 0) { 1558 fout = stdout; 1559 } else if (*savefile == '|') { 1560 oldpipe = xsignal(SIGPIPE, SIG_IGN); 1561 fout = popen(savefile + 1, "w"); 1562 if (fout == NULL) { 1563 warn("Can't execute `%s'", savefile + 1); 1564 goto cleanup_fetch_url; 1565 } 1566 closefunc = pclose; 1567 } 1568 } 1569 if (fout == NULL) { 1570 if ((pi.rangeend != -1 && pi.rangeend <= restart_point) || 1571 (pi.rangestart == -1 && 1572 filesize != -1 && filesize <= restart_point)) { 1573 /* already done */ 1574 if (verbose) 1575 fprintf(ttyout, "already done\n"); 1576 rval = 0; 1577 goto cleanup_fetch_url; 1578 } 1579 if (restart_point && pi.rangestart != -1) { 1580 if (pi.entitylen != -1) 1581 filesize = pi.entitylen; 1582 if (pi.rangestart != restart_point) { 1583 warnx( 1584 "Size of `%s' differs from save file `%s'", 1585 url, savefile); 1586 goto cleanup_fetch_url; 1587 } 1588 fout = fopen(savefile, "a"); 1589 } else 1590 fout = fopen(savefile, "w"); 1591 if (fout == NULL) { 1592 warn("Can't open `%s'", savefile); 1593 goto cleanup_fetch_url; 1594 } 1595 closefunc = fclose; 1596 } 1597 1598 /* Trap signals */ 1599 oldquit = xsignal(SIGQUIT, psummary); 1600 oldint = xsignal(SIGINT, aborthttp); 1601 1602 assert(rcvbuf_size > 0); 1603 if ((size_t)rcvbuf_size > bufsize) { 1604 if (xferbuf) 1605 (void)free(xferbuf); 1606 bufsize = rcvbuf_size; 1607 xferbuf = ftp_malloc(bufsize); 1608 } 1609 1610 bytes = 0; 1611 hashbytes = mark; 1612 if (oldalrm != SIG_ERR) { 1613 (void)xsignal(SIGALRM, oldalrm); 1614 oldalrm = SIG_ERR; 1615 } 1616 progressmeter(-1); 1617 1618 /* Finally, suck down the file. */ 1619 do { 1620 long chunksize; 1621 short lastchunk; 1622 1623 chunksize = 0; 1624 lastchunk = 0; 1625 /* read chunk-size */ 1626 if (ischunked) { 1627 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1628 warnx("Unexpected EOF reading chunk-size"); 1629 goto cleanup_fetch_url; 1630 } 1631 errno = 0; 1632 chunksize = strtol(xferbuf, &ep, 16); 1633 if (ep == xferbuf) { 1634 warnx("Invalid chunk-size"); 1635 goto cleanup_fetch_url; 1636 } 1637 if (errno == ERANGE || chunksize < 0) { 1638 errno = ERANGE; 1639 warn("Chunk-size `%.*s'", 1640 (int)(ep-xferbuf), xferbuf); 1641 goto cleanup_fetch_url; 1642 } 1643 1644 /* 1645 * XXX: Work around bug in Apache 1.3.9 and 1646 * 1.3.11, which incorrectly put trailing 1647 * space after the chunk-size. 1648 */ 1649 while (*ep == ' ') 1650 ep++; 1651 1652 /* skip [ chunk-ext ] */ 1653 if (*ep == ';') { 1654 while (*ep && *ep != '\r') 1655 ep++; 1656 } 1657 1658 if (strcmp(ep, "\r\n") != 0) { 1659 warnx("Unexpected data following chunk-size"); 1660 goto cleanup_fetch_url; 1661 } 1662 DPRINTF("%s: got chunk-size of " LLF "\n", __func__, 1663 (LLT)chunksize); 1664 if (chunksize == 0) { 1665 lastchunk = 1; 1666 goto chunkdone; 1667 } 1668 } 1669 /* transfer file or chunk */ 1670 while (1) { 1671 struct timeval then, now, td; 1672 volatile off_t bufrem; 1673 1674 if (rate_get) 1675 (void)gettimeofday(&then, NULL); 1676 bufrem = rate_get ? rate_get : (off_t)bufsize; 1677 if (ischunked) 1678 bufrem = MIN(chunksize, bufrem); 1679 while (bufrem > 0) { 1680 size_t nr = MIN((off_t)bufsize, bufrem); 1681 flen = fetch_read(xferbuf, sizeof(char), 1682 nr, fin); 1683 if (flen == 0) { 1684 if (fetch_error(fin)) 1685 goto chunkerror; 1686 goto chunkdone; 1687 } 1688 bytes += flen; 1689 bufrem -= flen; 1690 if (maxwrite(xferbuf, sizeof(char), flen, fout) 1691 != flen) { 1692 warn("Writing `%s'", savefile); 1693 goto cleanup_fetch_url; 1694 } 1695 if (hash && !progress) { 1696 while (bytes >= hashbytes) { 1697 (void)putc('#', ttyout); 1698 hashbytes += mark; 1699 } 1700 (void)fflush(ttyout); 1701 } 1702 if (ischunked) { 1703 chunksize -= flen; 1704 if (chunksize <= 0) 1705 break; 1706 } 1707 } 1708 if (rate_get) { 1709 while (1) { 1710 (void)gettimeofday(&now, NULL); 1711 timersub(&now, &then, &td); 1712 if (td.tv_sec > 0) 1713 break; 1714 usleep(1000000 - td.tv_usec); 1715 } 1716 } 1717 if (ischunked && chunksize <= 0) 1718 break; 1719 } 1720 /* read CRLF after chunk*/ 1721 chunkdone: 1722 if (ischunked) { 1723 if (fetch_getln(xferbuf, bufsize, fin) == NULL) { 1724 alarmtimer(0); 1725 warnx("Unexpected EOF reading chunk CRLF"); 1726 goto cleanup_fetch_url; 1727 } 1728 if (strcmp(xferbuf, "\r\n") != 0) { 1729 warnx("Unexpected data following chunk"); 1730 goto cleanup_fetch_url; 1731 } 1732 if (lastchunk) 1733 break; 1734 } 1735 } while (ischunked); 1736 1737 /* XXX: deal with optional trailer & CRLF here? */ 1738 chunkerror: 1739 if (hash && !progress && bytes > 0) { 1740 if (bytes < mark) 1741 (void)putc('#', ttyout); 1742 (void)putc('\n', ttyout); 1743 } 1744 if (fetch_error(fin)) { 1745 warn("Reading file"); 1746 goto cleanup_fetch_url; 1747 } 1748 progressmeter(1); 1749 (void)fflush(fout); 1750 if (closefunc == fclose && mtime != -1) { 1751 struct timeval tval[2]; 1752 1753 (void)gettimeofday(&tval[0], NULL); 1754 tval[1].tv_sec = mtime; 1755 tval[1].tv_usec = 0; 1756 (*closefunc)(fout); 1757 fout = NULL; 1758 1759 if (utimes(savefile, tval) == -1) { 1760 fprintf(ttyout, 1761 "Can't change modification time to %s", 1762 rfc2822time(localtime(&mtime))); 1763 } 1764 } 1765 if (bytes > 0) 1766 ptransfer(0); 1767 bytes = 0; 1768 1769 rval = 0; 1770 goto cleanup_fetch_url; 1771 1772 improper: 1773 warnx("Improper response from `%s:%s'", ui.host, ui.port); 1774 1775 cleanup_fetch_url: 1776 if (oldint != SIG_ERR) 1777 (void)xsignal(SIGINT, oldint); 1778 if (oldpipe != SIG_ERR) 1779 (void)xsignal(SIGPIPE, oldpipe); 1780 if (oldalrm != SIG_ERR) 1781 (void)xsignal(SIGALRM, oldalrm); 1782 if (oldquit != SIG_ERR) 1783 (void)xsignal(SIGQUIT, oldquit); 1784 if (fin != NULL) 1785 fetch_close(fin); 1786 else if (s != -1) 1787 close(s); 1788 if (closefunc != NULL && fout != NULL) 1789 (*closefunc)(fout); 1790 if (savefile != outfile) 1791 FREEPTR(savefile); 1792 freeurlinfo(&ui); 1793 freeurlinfo(&oui); 1794 freeauthinfo(&wauth); 1795 freeauthinfo(&pauth); 1796 FREEPTR(decodedpath); 1797 FREEPTR(auth); 1798 FREEPTR(location); 1799 FREEPTR(message); 1800 return (rval); 1801 } 1802 1803 /* 1804 * Abort a HTTP retrieval 1805 */ 1806 static void 1807 aborthttp(int notused) 1808 { 1809 char msgbuf[100]; 1810 int len; 1811 1812 sigint_raised = 1; 1813 alarmtimer(0); 1814 if (fromatty) { 1815 len = snprintf(msgbuf, sizeof(msgbuf), 1816 "\n%s: HTTP fetch aborted.\n", getprogname()); 1817 if (len > 0) 1818 write(fileno(ttyout), msgbuf, len); 1819 } 1820 siglongjmp(httpabort, 1); 1821 } 1822 1823 static void 1824 timeouthttp(int notused) 1825 { 1826 char msgbuf[100]; 1827 int len; 1828 1829 alarmtimer(0); 1830 if (fromatty) { 1831 len = snprintf(msgbuf, sizeof(msgbuf), 1832 "\n%s: HTTP fetch timeout.\n", getprogname()); 1833 if (len > 0) 1834 write(fileno(ttyout), msgbuf, len); 1835 } 1836 siglongjmp(httpabort, 1); 1837 } 1838 1839 /* 1840 * Retrieve ftp URL or classic ftp argument using FTP. 1841 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 1842 * is still open (e.g, ftp xfer with trailing /) 1843 */ 1844 static int 1845 fetch_ftp(const char *url) 1846 { 1847 char *cp, *xargv[5], rempath[MAXPATHLEN]; 1848 char *dir, *file; 1849 char cmdbuf[MAXPATHLEN]; 1850 char dirbuf[4]; 1851 int dirhasglob, filehasglob, rval, transtype, xargc; 1852 int oanonftp, oautologin; 1853 struct authinfo auth; 1854 struct urlinfo ui; 1855 1856 DPRINTF("fetch_ftp: `%s'\n", url); 1857 dir = file = NULL; 1858 rval = 1; 1859 transtype = TYPE_I; 1860 1861 initurlinfo(&ui); 1862 initauthinfo(&auth, NULL); 1863 1864 if (STRNEQUAL(url, FTP_URL)) { 1865 if ((parse_url(url, "URL", &ui, &auth) == -1) || 1866 (auth.user != NULL && *auth.user == '\0') || 1867 EMPTYSTRING(ui.host)) { 1868 warnx("Invalid URL `%s'", url); 1869 goto cleanup_fetch_ftp; 1870 } 1871 /* 1872 * Note: Don't url_decode(path) here. We need to keep the 1873 * distinction between "/" and "%2F" until later. 1874 */ 1875 1876 /* check for trailing ';type=[aid]' */ 1877 if (! EMPTYSTRING(ui.path) && (cp = strrchr(ui.path, ';')) != NULL) { 1878 if (strcasecmp(cp, ";type=a") == 0) 1879 transtype = TYPE_A; 1880 else if (strcasecmp(cp, ";type=i") == 0) 1881 transtype = TYPE_I; 1882 else if (strcasecmp(cp, ";type=d") == 0) { 1883 warnx( 1884 "Directory listing via a URL is not supported"); 1885 goto cleanup_fetch_ftp; 1886 } else { 1887 warnx("Invalid suffix `%s' in URL `%s'", cp, 1888 url); 1889 goto cleanup_fetch_ftp; 1890 } 1891 *cp = 0; 1892 } 1893 } else { /* classic style `[user@]host:[file]' */ 1894 ui.utype = CLASSIC_URL_T; 1895 ui.host = ftp_strdup(url); 1896 cp = strchr(ui.host, '@'); 1897 if (cp != NULL) { 1898 *cp = '\0'; 1899 auth.user = ui.host; 1900 anonftp = 0; /* disable anonftp */ 1901 ui.host = ftp_strdup(cp + 1); 1902 } 1903 cp = strchr(ui.host, ':'); 1904 if (cp != NULL) { 1905 *cp = '\0'; 1906 ui.path = ftp_strdup(cp + 1); 1907 } 1908 } 1909 if (EMPTYSTRING(ui.host)) 1910 goto cleanup_fetch_ftp; 1911 1912 /* Extract the file and (if present) directory name. */ 1913 dir = ui.path; 1914 if (! EMPTYSTRING(dir)) { 1915 /* 1916 * If we are dealing with classic `[user@]host:[path]' syntax, 1917 * then a path of the form `/file' (resulting from input of the 1918 * form `host:/file') means that we should do "CWD /" before 1919 * retrieving the file. So we set dir="/" and file="file". 1920 * 1921 * But if we are dealing with URLs like `ftp://host/path' then 1922 * a path of the form `/file' (resulting from a URL of the form 1923 * `ftp://host//file') means that we should do `CWD ' (with an 1924 * empty argument) before retrieving the file. So we set 1925 * dir="" and file="file". 1926 * 1927 * If the path does not contain / at all, we set dir=NULL. 1928 * (We get a path without any slashes if we are dealing with 1929 * classic `[user@]host:[file]' or URL `ftp://host/file'.) 1930 * 1931 * In all other cases, we set dir to a string that does not 1932 * include the final '/' that separates the dir part from the 1933 * file part of the path. (This will be the empty string if 1934 * and only if we are dealing with a path of the form `/file' 1935 * resulting from an URL of the form `ftp://host//file'.) 1936 */ 1937 cp = strrchr(dir, '/'); 1938 if (cp == dir && ui.utype == CLASSIC_URL_T) { 1939 file = cp + 1; 1940 (void)strlcpy(dirbuf, "/", sizeof(dirbuf)); 1941 dir = dirbuf; 1942 } else if (cp != NULL) { 1943 *cp++ = '\0'; 1944 file = cp; 1945 } else { 1946 file = dir; 1947 dir = NULL; 1948 } 1949 } else 1950 dir = NULL; 1951 if (ui.utype == FTP_URL_T && file != NULL) { 1952 url_decode(file); 1953 /* but still don't url_decode(dir) */ 1954 } 1955 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s " 1956 "path `%s' dir `%s' file `%s'\n", 1957 STRorNULL(auth.user), STRorNULL(auth.pass), 1958 STRorNULL(ui.host), STRorNULL(ui.port), 1959 STRorNULL(ui.path), STRorNULL(dir), STRorNULL(file)); 1960 1961 dirhasglob = filehasglob = 0; 1962 if (doglob && 1963 (ui.utype == CLASSIC_URL_T || ui.utype == FTP_URL_T)) { 1964 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL) 1965 dirhasglob = 1; 1966 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL) 1967 filehasglob = 1; 1968 } 1969 1970 /* Set up the connection */ 1971 oanonftp = anonftp; 1972 if (connected) 1973 disconnect(0, NULL); 1974 anonftp = oanonftp; 1975 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf)); 1976 xargv[0] = cmdbuf; 1977 xargv[1] = ui.host; 1978 xargv[2] = NULL; 1979 xargc = 2; 1980 if (ui.port) { 1981 xargv[2] = ui.port; 1982 xargv[3] = NULL; 1983 xargc = 3; 1984 } 1985 oautologin = autologin; 1986 /* don't autologin in setpeer(), use ftp_login() below */ 1987 autologin = 0; 1988 setpeer(xargc, xargv); 1989 autologin = oautologin; 1990 if ((connected == 0) || 1991 (connected == 1 && !ftp_login(ui.host, auth.user, auth.pass))) { 1992 warnx("Can't connect or login to host `%s:%s'", 1993 ui.host, ui.port ? ui.port : "?"); 1994 goto cleanup_fetch_ftp; 1995 } 1996 1997 switch (transtype) { 1998 case TYPE_A: 1999 setascii(1, xargv); 2000 break; 2001 case TYPE_I: 2002 setbinary(1, xargv); 2003 break; 2004 default: 2005 errx(1, "fetch_ftp: unknown transfer type %d", transtype); 2006 } 2007 2008 /* 2009 * Change directories, if necessary. 2010 * 2011 * Note: don't use EMPTYSTRING(dir) below, because 2012 * dir=="" means something different from dir==NULL. 2013 */ 2014 if (dir != NULL && !dirhasglob) { 2015 char *nextpart; 2016 2017 /* 2018 * If we are dealing with a classic `[user@]host:[path]' 2019 * (urltype is CLASSIC_URL_T) then we have a raw directory 2020 * name (not encoded in any way) and we can change 2021 * directories in one step. 2022 * 2023 * If we are dealing with an `ftp://host/path' URL 2024 * (urltype is FTP_URL_T), then RFC 3986 says we need to 2025 * send a separate CWD command for each unescaped "/" 2026 * in the path, and we have to interpret %hex escaping 2027 * *after* we find the slashes. It's possible to get 2028 * empty components here, (from multiple adjacent 2029 * slashes in the path) and RFC 3986 says that we should 2030 * still do `CWD ' (with a null argument) in such cases. 2031 * 2032 * Many ftp servers don't support `CWD ', so if there's an 2033 * error performing that command, bail out with a descriptive 2034 * message. 2035 * 2036 * Examples: 2037 * 2038 * host: dir="", urltype=CLASSIC_URL_T 2039 * logged in (to default directory) 2040 * host:file dir=NULL, urltype=CLASSIC_URL_T 2041 * "RETR file" 2042 * host:dir/ dir="dir", urltype=CLASSIC_URL_T 2043 * "CWD dir", logged in 2044 * ftp://host/ dir="", urltype=FTP_URL_T 2045 * logged in (to default directory) 2046 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T 2047 * "CWD dir", logged in 2048 * ftp://host/file dir=NULL, urltype=FTP_URL_T 2049 * "RETR file" 2050 * ftp://host//file dir="", urltype=FTP_URL_T 2051 * "CWD ", "RETR file" 2052 * host:/file dir="/", urltype=CLASSIC_URL_T 2053 * "CWD /", "RETR file" 2054 * ftp://host///file dir="/", urltype=FTP_URL_T 2055 * "CWD ", "CWD ", "RETR file" 2056 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T 2057 * "CWD /", "RETR file" 2058 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T 2059 * "CWD foo", "RETR file" 2060 * ftp://host/foo/bar/file dir="foo/bar" 2061 * "CWD foo", "CWD bar", "RETR file" 2062 * ftp://host//foo/bar/file dir="/foo/bar" 2063 * "CWD ", "CWD foo", "CWD bar", "RETR file" 2064 * ftp://host/foo//bar/file dir="foo//bar" 2065 * "CWD foo", "CWD ", "CWD bar", "RETR file" 2066 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar" 2067 * "CWD /", "CWD foo", "CWD bar", "RETR file" 2068 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar" 2069 * "CWD /foo", "CWD bar", "RETR file" 2070 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar" 2071 * "CWD /foo/bar", "RETR file" 2072 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL 2073 * "RETR /foo/bar/file" 2074 * 2075 * Note that we don't need `dir' after this point. 2076 */ 2077 do { 2078 if (ui.utype == FTP_URL_T) { 2079 nextpart = strchr(dir, '/'); 2080 if (nextpart) { 2081 *nextpart = '\0'; 2082 nextpart++; 2083 } 2084 url_decode(dir); 2085 } else 2086 nextpart = NULL; 2087 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n", 2088 STRorNULL(dir), STRorNULL(nextpart)); 2089 if (ui.utype == FTP_URL_T || *dir != '\0') { 2090 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf)); 2091 xargv[0] = cmdbuf; 2092 xargv[1] = dir; 2093 xargv[2] = NULL; 2094 dirchange = 0; 2095 cd(2, xargv); 2096 if (! dirchange) { 2097 if (*dir == '\0' && code == 500) 2098 fprintf(stderr, 2099 "\n" 2100 "ftp: The `CWD ' command (without a directory), which is required by\n" 2101 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n" 2102 " conflicts with the server's conformance to RFC 959.\n" 2103 " Try the same URL without the `//' in the URL pathname.\n" 2104 "\n"); 2105 goto cleanup_fetch_ftp; 2106 } 2107 } 2108 dir = nextpart; 2109 } while (dir != NULL); 2110 } 2111 2112 if (EMPTYSTRING(file)) { 2113 rval = -1; 2114 goto cleanup_fetch_ftp; 2115 } 2116 2117 if (dirhasglob) { 2118 (void)strlcpy(rempath, dir, sizeof(rempath)); 2119 (void)strlcat(rempath, "/", sizeof(rempath)); 2120 (void)strlcat(rempath, file, sizeof(rempath)); 2121 file = rempath; 2122 } 2123 2124 /* Fetch the file(s). */ 2125 xargc = 2; 2126 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf)); 2127 xargv[0] = cmdbuf; 2128 xargv[1] = file; 2129 xargv[2] = NULL; 2130 if (dirhasglob || filehasglob) { 2131 int ointeractive; 2132 2133 ointeractive = interactive; 2134 interactive = 0; 2135 if (restartautofetch) 2136 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf)); 2137 else 2138 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf)); 2139 xargv[0] = cmdbuf; 2140 mget(xargc, xargv); 2141 interactive = ointeractive; 2142 } else { 2143 char *destfile = outfile; 2144 if (destfile == NULL) { 2145 cp = strrchr(file, '/'); /* find savefile */ 2146 if (cp != NULL) 2147 destfile = cp + 1; 2148 else 2149 destfile = file; 2150 } 2151 xargv[2] = (char *)destfile; 2152 xargv[3] = NULL; 2153 xargc++; 2154 if (restartautofetch) 2155 reget(xargc, xargv); 2156 else 2157 get(xargc, xargv); 2158 } 2159 2160 if ((code / 100) == COMPLETE) 2161 rval = 0; 2162 2163 cleanup_fetch_ftp: 2164 freeurlinfo(&ui); 2165 freeauthinfo(&auth); 2166 return (rval); 2167 } 2168 2169 /* 2170 * Retrieve the given file to outfile. 2171 * Supports arguments of the form: 2172 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else 2173 * call fetch_ftp() 2174 * "http://host/path" call fetch_url() to use HTTP 2175 * "file:///path" call fetch_url() to copy 2176 * "about:..." print a message 2177 * 2178 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection 2179 * is still open (e.g, ftp xfer with trailing /) 2180 */ 2181 static int 2182 go_fetch(const char *url) 2183 { 2184 char *proxyenv; 2185 char *p; 2186 2187 #ifndef NO_ABOUT 2188 /* 2189 * Check for about:* 2190 */ 2191 if (STRNEQUAL(url, ABOUT_URL)) { 2192 url += sizeof(ABOUT_URL) -1; 2193 if (strcasecmp(url, "ftp") == 0 || 2194 strcasecmp(url, "tnftp") == 0) { 2195 fputs( 2196 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n" 2197 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout); 2198 } else if (strcasecmp(url, "lukem") == 0) { 2199 fputs( 2200 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n" 2201 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout); 2202 } else if (strcasecmp(url, "netbsd") == 0) { 2203 fputs( 2204 "NetBSD is a freely available and redistributable UNIX-like operating system.\n" 2205 "For more information, see http://www.NetBSD.org/\n", ttyout); 2206 } else if (strcasecmp(url, "version") == 0) { 2207 fprintf(ttyout, "Version: %s %s%s\n", 2208 FTP_PRODUCT, FTP_VERSION, 2209 #ifdef INET6 2210 "" 2211 #else 2212 " (-IPv6)" 2213 #endif 2214 ); 2215 } else { 2216 fprintf(ttyout, "`%s' is an interesting topic.\n", url); 2217 } 2218 fputs("\n", ttyout); 2219 return (0); 2220 } 2221 #endif 2222 2223 /* 2224 * Check for file:// and http:// URLs. 2225 */ 2226 if (STRNEQUAL(url, HTTP_URL) 2227 #ifdef WITH_SSL 2228 || STRNEQUAL(url, HTTPS_URL) 2229 #endif 2230 || STRNEQUAL(url, FILE_URL)) 2231 return (fetch_url(url, NULL, NULL, NULL)); 2232 2233 /* 2234 * If it contains "://" but does not begin with ftp:// 2235 * or something that was already handled, then it's 2236 * unsupported. 2237 * 2238 * If it contains ":" but not "://" then we assume the 2239 * part before the colon is a host name, not an URL scheme, 2240 * so we don't try to match that here. 2241 */ 2242 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL)) 2243 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url); 2244 2245 /* 2246 * Try FTP URL-style and host:file arguments next. 2247 * If ftpproxy is set with an FTP URL, use fetch_url() 2248 * Otherwise, use fetch_ftp(). 2249 */ 2250 proxyenv = getoptionvalue("ftp_proxy"); 2251 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL)) 2252 return (fetch_url(url, NULL, NULL, NULL)); 2253 2254 return (fetch_ftp(url)); 2255 } 2256 2257 /* 2258 * Retrieve multiple files from the command line, 2259 * calling go_fetch() for each file. 2260 * 2261 * If an ftp path has a trailing "/", the path will be cd-ed into and 2262 * the connection remains open, and the function will return -1 2263 * (to indicate the connection is alive). 2264 * If an error occurs the return value will be the offset+1 in 2265 * argv[] of the file that caused a problem (i.e, argv[x] 2266 * returns x+1) 2267 * Otherwise, 0 is returned if all files retrieved successfully. 2268 */ 2269 int 2270 auto_fetch(int argc, char *argv[]) 2271 { 2272 volatile int argpos, rval; 2273 2274 argpos = rval = 0; 2275 2276 if (sigsetjmp(toplevel, 1)) { 2277 if (connected) 2278 disconnect(0, NULL); 2279 if (rval > 0) 2280 rval = argpos + 1; 2281 return (rval); 2282 } 2283 (void)xsignal(SIGINT, intr); 2284 (void)xsignal(SIGPIPE, lostpeer); 2285 2286 /* 2287 * Loop through as long as there's files to fetch. 2288 */ 2289 for (; (rval == 0) && (argpos < argc); argpos++) { 2290 if (strchr(argv[argpos], ':') == NULL) 2291 break; 2292 redirect_loop = 0; 2293 if (!anonftp) 2294 anonftp = 2; /* Handle "automatic" transfers. */ 2295 rval = go_fetch(argv[argpos]); 2296 if (outfile != NULL && strcmp(outfile, "-") != 0 2297 && outfile[0] != '|') { 2298 FREEPTR(outfile); 2299 } 2300 if (rval > 0) 2301 rval = argpos + 1; 2302 } 2303 2304 if (connected && rval != -1) 2305 disconnect(0, NULL); 2306 return (rval); 2307 } 2308 2309 2310 /* 2311 * Upload multiple files from the command line. 2312 * 2313 * If an error occurs the return value will be the offset+1 in 2314 * argv[] of the file that caused a problem (i.e, argv[x] 2315 * returns x+1) 2316 * Otherwise, 0 is returned if all files uploaded successfully. 2317 */ 2318 int 2319 auto_put(int argc, char **argv, const char *uploadserver) 2320 { 2321 char *uargv[4], *path, *pathsep; 2322 int uargc, rval, argpos; 2323 size_t len; 2324 char cmdbuf[MAX_C_NAME]; 2325 2326 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf)); 2327 uargv[0] = cmdbuf; 2328 uargv[1] = argv[0]; 2329 uargc = 2; 2330 uargv[2] = uargv[3] = NULL; 2331 pathsep = NULL; 2332 rval = 1; 2333 2334 DPRINTF("auto_put: target `%s'\n", uploadserver); 2335 2336 path = ftp_strdup(uploadserver); 2337 len = strlen(path); 2338 if (path[len - 1] != '/' && path[len - 1] != ':') { 2339 /* 2340 * make sure we always pass a directory to auto_fetch 2341 */ 2342 if (argc > 1) { /* more than one file to upload */ 2343 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */ 2344 free(path); 2345 path = (char *)ftp_malloc(len); 2346 (void)strlcpy(path, uploadserver, len); 2347 (void)strlcat(path, "/", len); 2348 } else { /* single file to upload */ 2349 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf)); 2350 uargv[0] = cmdbuf; 2351 pathsep = strrchr(path, '/'); 2352 if (pathsep == NULL) { 2353 pathsep = strrchr(path, ':'); 2354 if (pathsep == NULL) { 2355 warnx("Invalid URL `%s'", path); 2356 goto cleanup_auto_put; 2357 } 2358 pathsep++; 2359 uargv[2] = ftp_strdup(pathsep); 2360 pathsep[0] = '/'; 2361 } else 2362 uargv[2] = ftp_strdup(pathsep + 1); 2363 pathsep[1] = '\0'; 2364 uargc++; 2365 } 2366 } 2367 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n", 2368 path, STRorNULL(uargv[2])); 2369 2370 /* connect and cwd */ 2371 rval = auto_fetch(1, &path); 2372 if(rval >= 0) 2373 goto cleanup_auto_put; 2374 2375 rval = 0; 2376 2377 /* target filename provided; upload 1 file */ 2378 /* XXX : is this the best way? */ 2379 if (uargc == 3) { 2380 uargv[1] = argv[0]; 2381 put(uargc, uargv); 2382 if ((code / 100) != COMPLETE) 2383 rval = 1; 2384 } else { /* otherwise a target dir: upload all files to it */ 2385 for(argpos = 0; argv[argpos] != NULL; argpos++) { 2386 uargv[1] = argv[argpos]; 2387 mput(uargc, uargv); 2388 if ((code / 100) != COMPLETE) { 2389 rval = argpos + 1; 2390 break; 2391 } 2392 } 2393 } 2394 2395 cleanup_auto_put: 2396 free(path); 2397 FREEPTR(uargv[2]); 2398 return (rval); 2399 } 2400