kernel - Fix issue w/ buffer ortation when doing non-blocking read from bpf
[dragonfly.git] / contrib / tnftp / fetch.c
blob4e857e3bf240e4d90d01087955f37b7e65b423ef
1 /* $NetBSD: fetch.c,v 1.185 2008/04/28 20:24:13 martin Exp $ */
3 /*-
4 * Copyright (c) 1997-2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Scott Aaron Bamford.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/cdefs.h>
36 #ifndef lint
37 __RCSID("$NetBSD: fetch.c,v 1.185 2008/04/28 20:24:13 martin Exp $");
38 #endif /* not lint */
41 * FTP User Program -- Command line file retrieval
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/socket.h>
47 #include <sys/stat.h>
48 #include <sys/time.h>
50 #include <netinet/in.h>
52 #include <arpa/ftp.h>
53 #include <arpa/inet.h>
55 #include <ctype.h>
56 #include <err.h>
57 #include <errno.h>
58 #include <netdb.h>
59 #include <fcntl.h>
60 #include <stdio.h>
61 #include <libutil.h>
62 #include <stdlib.h>
63 #include <string.h>
64 #include <unistd.h>
65 #include <time.h>
67 #include "ftp_var.h"
68 #include "version.h"
70 typedef enum {
71 UNKNOWN_URL_T=-1,
72 HTTP_URL_T,
73 FTP_URL_T,
74 FILE_URL_T,
75 CLASSIC_URL_T
76 } url_t;
78 void aborthttp(int);
79 #ifndef NO_AUTH
80 static int auth_url(const char *, char **, const char *, const char *);
81 static void base64_encode(const unsigned char *, size_t, unsigned char *);
82 #endif
83 static int go_fetch(const char *);
84 static int fetch_ftp(const char *);
85 static int fetch_url(const char *, const char *, char *, char *);
86 static const char *match_token(const char **, const char *);
87 static int parse_url(const char *, const char *, url_t *, char **,
88 char **, char **, char **, in_port_t *, char **);
89 static void url_decode(char *);
91 static int redirect_loop;
94 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
95 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
96 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
99 #define ABOUT_URL "about:" /* propaganda */
100 #define FILE_URL "file://" /* file URL prefix */
101 #define FTP_URL "ftp://" /* ftp URL prefix */
102 #define HTTP_URL "http://" /* http URL prefix */
106 * Determine if token is the next word in buf (case insensitive).
107 * If so, advance buf past the token and any trailing LWS, and
108 * return a pointer to the token (in buf). Otherwise, return NULL.
109 * token may be preceded by LWS.
110 * token must be followed by LWS or NUL. (I.e, don't partial match).
112 static const char *
113 match_token(const char **buf, const char *token)
115 const char *p, *orig;
116 size_t tlen;
118 tlen = strlen(token);
119 p = *buf;
120 SKIPLWS(p);
121 orig = p;
122 if (strncasecmp(p, token, tlen) != 0)
123 return NULL;
124 p += tlen;
125 if (*p != '\0' && !ISLWS(*p))
126 return NULL;
127 SKIPLWS(p);
128 orig = *buf;
129 *buf = p;
130 return orig;
133 #ifndef NO_AUTH
135 * Generate authorization response based on given authentication challenge.
136 * Returns -1 if an error occurred, otherwise 0.
137 * Sets response to a malloc(3)ed string; caller should free.
139 static int
140 auth_url(const char *challenge, char **response, const char *guser,
141 const char *gpass)
143 const char *cp, *scheme, *errormsg;
144 char *ep, *clear, *realm;
145 char user[BUFSIZ], *pass;
146 int rval;
147 size_t len, clen, rlen;
149 *response = NULL;
150 clear = realm = NULL;
151 rval = -1;
152 cp = challenge;
153 scheme = "Basic"; /* only support Basic authentication */
155 DPRINTF("auth_url: challenge `%s'\n", challenge);
157 if (! match_token(&cp, scheme)) {
158 warnx("Unsupported authentication challenge `%s'",
159 challenge);
160 goto cleanup_auth_url;
163 #define REALM "realm=\""
164 if (STRNEQUAL(cp, REALM))
165 cp += sizeof(REALM) - 1;
166 else {
167 warnx("Unsupported authentication challenge `%s'",
168 challenge);
169 goto cleanup_auth_url;
171 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
172 if ((ep = strchr(cp, '\"')) != NULL) {
173 size_t len = ep - cp;
175 realm = (char *)ftp_malloc(len + 1);
176 (void)strlcpy(realm, cp, len + 1);
177 } else {
178 warnx("Unsupported authentication challenge `%s'",
179 challenge);
180 goto cleanup_auth_url;
183 fprintf(ttyout, "Username for `%s': ", realm);
184 if (guser != NULL) {
185 (void)strlcpy(user, guser, sizeof(user));
186 fprintf(ttyout, "%s\n", user);
187 } else {
188 (void)fflush(ttyout);
189 if (getline(stdin, user, sizeof(user), &errormsg) < 0) {
190 warnx("%s; can't authenticate", errormsg);
191 goto cleanup_auth_url;
194 if (gpass != NULL)
195 pass = (char *)gpass;
196 else {
197 pass = getpass("Password: ");
198 if (pass == NULL) {
199 warnx("Can't read password");
200 goto cleanup_auth_url;
204 clen = strlen(user) + strlen(pass) + 2; /* user + ":" + pass + "\0" */
205 clear = (char *)ftp_malloc(clen);
206 (void)strlcpy(clear, user, clen);
207 (void)strlcat(clear, ":", clen);
208 (void)strlcat(clear, pass, clen);
209 if (gpass == NULL)
210 memset(pass, 0, strlen(pass));
212 /* scheme + " " + enc + "\0" */
213 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
214 *response = (char *)ftp_malloc(rlen);
215 (void)strlcpy(*response, scheme, rlen);
216 len = strlcat(*response, " ", rlen);
217 /* use `clen - 1' to not encode the trailing NUL */
218 base64_encode((unsigned char *)clear, clen - 1,
219 (unsigned char *)*response + len);
220 memset(clear, 0, clen);
221 rval = 0;
223 cleanup_auth_url:
224 FREEPTR(clear);
225 FREEPTR(realm);
226 return (rval);
230 * Encode len bytes starting at clear using base64 encoding into encoded,
231 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
233 static void
234 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
236 static const unsigned char enc[] =
237 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
238 unsigned char *cp;
239 int i;
241 cp = encoded;
242 for (i = 0; i < len; i += 3) {
243 *(cp++) = enc[((clear[i + 0] >> 2))];
244 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
245 | ((clear[i + 1] >> 4) & 0x0f)];
246 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
247 | ((clear[i + 2] >> 6) & 0x03)];
248 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
250 *cp = '\0';
251 while (i-- > len)
252 *(--cp) = '=';
254 #endif
257 * Decode %xx escapes in given string, `in-place'.
259 static void
260 url_decode(char *url)
262 unsigned char *p, *q;
264 if (EMPTYSTRING(url))
265 return;
266 p = q = (unsigned char *)url;
268 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
269 while (*p) {
270 if (p[0] == '%'
271 && p[1] && isxdigit((unsigned char)p[1])
272 && p[2] && isxdigit((unsigned char)p[2])) {
273 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
274 p+=3;
275 } else
276 *q++ = *p++;
278 *q = '\0';
283 * Parse URL of form (per RFC3986):
284 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
285 * Returns -1 if a parse error occurred, otherwise 0.
286 * It's the caller's responsibility to url_decode() the returned
287 * user, pass and path.
289 * Sets type to url_t, each of the given char ** pointers to a
290 * malloc(3)ed strings of the relevant section, and port to
291 * the number given, or ftpport if ftp://, or httpport if http://.
293 * XXX: this is not totally RFC3986 compliant; <path> will have the
294 * leading `/' unless it's an ftp:// URL, as this makes things easier
295 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
296 * host and the URL-path removed, but any additional leading slashes
297 * in the URL-path are retained (because they imply that we should
298 * later do "CWD" with a null argument).
300 * Examples:
301 * input URL output path
302 * --------- -----------
303 * "http://host" "/"
304 * "http://host/" "/"
305 * "http://host/path" "/path"
306 * "file://host/dir/file" "dir/file"
307 * "ftp://host" ""
308 * "ftp://host/" ""
309 * "ftp://host//" "/"
310 * "ftp://host/dir/file" "dir/file"
311 * "ftp://host//dir/file" "/dir/file"
313 static int
314 parse_url(const char *url, const char *desc, url_t *type,
315 char **user, char **pass, char **host, char **port,
316 in_port_t *portnum, char **path)
318 const char *origurl;
319 char *cp, *ep, *thost, *tport;
320 size_t len;
322 if (url == NULL || desc == NULL || type == NULL || user == NULL
323 || pass == NULL || host == NULL || port == NULL || portnum == NULL
324 || path == NULL)
325 errx(1, "parse_url: invoked with NULL argument!");
326 DPRINTF("parse_url: %s `%s'\n", desc, url);
328 origurl = url;
329 *type = UNKNOWN_URL_T;
330 *user = *pass = *host = *port = *path = NULL;
331 *portnum = 0;
332 tport = NULL;
334 if (STRNEQUAL(url, HTTP_URL)) {
335 url += sizeof(HTTP_URL) - 1;
336 *type = HTTP_URL_T;
337 *portnum = HTTP_PORT;
338 tport = httpport;
339 } else if (STRNEQUAL(url, FTP_URL)) {
340 url += sizeof(FTP_URL) - 1;
341 *type = FTP_URL_T;
342 *portnum = FTP_PORT;
343 tport = ftpport;
344 } else if (STRNEQUAL(url, FILE_URL)) {
345 url += sizeof(FILE_URL) - 1;
346 *type = FILE_URL_T;
347 } else {
348 warnx("Invalid %s `%s'", desc, url);
349 cleanup_parse_url:
350 FREEPTR(*user);
351 if (*pass != NULL)
352 memset(*pass, 0, strlen(*pass));
353 FREEPTR(*pass);
354 FREEPTR(*host);
355 FREEPTR(*port);
356 FREEPTR(*path);
357 return (-1);
360 if (*url == '\0')
361 return (0);
363 /* find [user[:pass]@]host[:port] */
364 ep = strchr(url, '/');
365 if (ep == NULL)
366 thost = ftp_strdup(url);
367 else {
368 len = ep - url;
369 thost = (char *)ftp_malloc(len + 1);
370 (void)strlcpy(thost, url, len + 1);
371 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
372 ep++;
373 *path = ftp_strdup(ep);
376 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
377 if (cp != NULL) {
378 if (*type == FTP_URL_T)
379 anonftp = 0; /* disable anonftp */
380 *user = thost;
381 *cp = '\0';
382 thost = ftp_strdup(cp + 1);
383 cp = strchr(*user, ':');
384 if (cp != NULL) {
385 *cp = '\0';
386 *pass = ftp_strdup(cp + 1);
388 url_decode(*user);
389 if (*pass)
390 url_decode(*pass);
393 #ifdef INET6
395 * Check if thost is an encoded IPv6 address, as per
396 * RFC3986:
397 * `[' ipv6-address ']'
399 if (*thost == '[') {
400 cp = thost + 1;
401 if ((ep = strchr(cp, ']')) == NULL ||
402 (ep[1] != '\0' && ep[1] != ':')) {
403 warnx("Invalid address `%s' in %s `%s'",
404 thost, desc, origurl);
405 goto cleanup_parse_url;
407 len = ep - cp; /* change `[xyz]' -> `xyz' */
408 memmove(thost, thost + 1, len);
409 thost[len] = '\0';
410 if (! isipv6addr(thost)) {
411 warnx("Invalid IPv6 address `%s' in %s `%s'",
412 thost, desc, origurl);
413 goto cleanup_parse_url;
415 cp = ep + 1;
416 if (*cp == ':')
417 cp++;
418 else
419 cp = NULL;
420 } else
421 #endif /* INET6 */
422 if ((cp = strchr(thost, ':')) != NULL)
423 *cp++ = '\0';
424 *host = thost;
426 /* look for [:port] */
427 if (cp != NULL) {
428 unsigned long nport;
430 nport = strtoul(cp, &ep, 10);
431 if (*cp == '\0' || *ep != '\0' ||
432 nport < 1 || nport > MAX_IN_PORT_T) {
433 warnx("Unknown port `%s' in %s `%s'",
434 cp, desc, origurl);
435 goto cleanup_parse_url;
437 *portnum = nport;
438 tport = cp;
441 if (tport != NULL)
442 *port = ftp_strdup(tport);
443 if (*path == NULL) {
444 const char *emptypath = "/";
445 if (*type == FTP_URL_T) /* skip first / for ftp URLs */
446 emptypath++;
447 *path = ftp_strdup(emptypath);
450 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
451 "path `%s'\n",
452 STRorNULL(*user), STRorNULL(*pass),
453 STRorNULL(*host), STRorNULL(*port),
454 *portnum ? *portnum : -1, STRorNULL(*path));
456 return (0);
459 sigjmp_buf httpabort;
462 * Retrieve URL, via a proxy if necessary, using HTTP.
463 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
464 * http_proxy as appropriate.
465 * Supports HTTP redirects.
466 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
467 * is still open (e.g, ftp xfer with trailing /)
469 static int
470 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
472 struct addrinfo hints, *res, *res0 = NULL;
473 int error;
474 sigfunc volatile oldintr;
475 sigfunc volatile oldintp;
476 int volatile s;
477 struct stat sb;
478 int volatile ischunked;
479 int volatile isproxy;
480 int volatile rval;
481 int volatile hcode;
482 size_t len;
483 static size_t bufsize;
484 static char *xferbuf;
485 const char *cp, *token;
486 char *ep;
487 char buf[FTPBUFLEN];
488 const char *errormsg;
489 char *volatile savefile;
490 char *volatile auth;
491 char *volatile location;
492 char *volatile message;
493 char *user, *pass, *host, *port, *path;
494 char *volatile decodedpath;
495 char *puser, *ppass, *useragent;
496 off_t hashbytes, rangestart, rangeend, entitylen;
497 int (*volatile closefunc)(FILE *);
498 FILE *volatile fin;
499 FILE *volatile fout;
500 time_t mtime;
501 url_t urltype;
502 in_port_t portnum;
504 DPRINTF("fetch_url: `%s' proxyenv `%s'\n", url, STRorNULL(proxyenv));
506 oldintr = oldintp = NULL;
507 closefunc = NULL;
508 fin = fout = NULL;
509 s = -1;
510 savefile = NULL;
511 auth = location = message = NULL;
512 ischunked = isproxy = hcode = 0;
513 rval = 1;
514 user = pass = host = path = decodedpath = puser = ppass = NULL;
516 if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
517 &portnum, &path) == -1)
518 goto cleanup_fetch_url;
520 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
521 && strcasecmp(host, "localhost") != 0) {
522 warnx("No support for non local file URL `%s'", url);
523 goto cleanup_fetch_url;
526 if (EMPTYSTRING(path)) {
527 if (urltype == FTP_URL_T) {
528 rval = fetch_ftp(url);
529 goto cleanup_fetch_url;
531 if (urltype != HTTP_URL_T || outfile == NULL) {
532 warnx("Invalid URL (no file after host) `%s'", url);
533 goto cleanup_fetch_url;
537 decodedpath = ftp_strdup(path);
538 url_decode(decodedpath);
540 if (outfile)
541 savefile = ftp_strdup(outfile);
542 else {
543 cp = strrchr(decodedpath, '/'); /* find savefile */
544 if (cp != NULL)
545 savefile = ftp_strdup(cp + 1);
546 else
547 savefile = ftp_strdup(decodedpath);
549 DPRINTF("fetch_url: savefile `%s'\n", savefile);
550 if (EMPTYSTRING(savefile)) {
551 if (urltype == FTP_URL_T) {
552 rval = fetch_ftp(url);
553 goto cleanup_fetch_url;
555 warnx("No file after directory (you must specify an "
556 "output file) `%s'", url);
557 goto cleanup_fetch_url;
560 restart_point = 0;
561 filesize = -1;
562 rangestart = rangeend = entitylen = -1;
563 mtime = -1;
564 if (restartautofetch) {
565 if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
566 stat(savefile, &sb) == 0)
567 restart_point = sb.st_size;
569 if (urltype == FILE_URL_T) { /* file:// URLs */
570 direction = "copied";
571 fin = fopen(decodedpath, "r");
572 if (fin == NULL) {
573 warn("Can't open `%s'", decodedpath);
574 goto cleanup_fetch_url;
576 if (fstat(fileno(fin), &sb) == 0) {
577 mtime = sb.st_mtime;
578 filesize = sb.st_size;
580 if (restart_point) {
581 if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
582 warn("Can't seek to restart `%s'",
583 decodedpath);
584 goto cleanup_fetch_url;
587 if (verbose) {
588 fprintf(ttyout, "Copying %s", decodedpath);
589 if (restart_point)
590 fprintf(ttyout, " (restarting at " LLF ")",
591 (LLT)restart_point);
592 fputs("\n", ttyout);
594 } else { /* ftp:// or http:// URLs */
595 char *leading;
596 int hasleading;
598 if (proxyenv == NULL) {
599 if (urltype == HTTP_URL_T)
600 proxyenv = getoptionvalue("http_proxy");
601 else if (urltype == FTP_URL_T)
602 proxyenv = getoptionvalue("ftp_proxy");
604 direction = "retrieved";
605 if (! EMPTYSTRING(proxyenv)) { /* use proxy */
606 url_t purltype;
607 char *phost, *ppath;
608 char *pport, *no_proxy;
609 in_port_t pportnum;
611 isproxy = 1;
613 /* check URL against list of no_proxied sites */
614 no_proxy = getoptionvalue("no_proxy");
615 if (! EMPTYSTRING(no_proxy)) {
616 char *np, *np_copy, *np_iter;
617 unsigned long np_port;
618 size_t hlen, plen;
620 np_iter = np_copy = ftp_strdup(no_proxy);
621 hlen = strlen(host);
622 while ((cp = strsep(&np_iter, " ,")) != NULL) {
623 if (*cp == '\0')
624 continue;
625 if ((np = strrchr(cp, ':')) != NULL) {
626 *np++ = '\0';
627 np_port = strtoul(np, &ep, 10);
628 if (*np == '\0' || *ep != '\0')
629 continue;
630 if (np_port != portnum)
631 continue;
633 plen = strlen(cp);
634 if (hlen < plen)
635 continue;
636 if (strncasecmp(host + hlen - plen,
637 cp, plen) == 0) {
638 isproxy = 0;
639 break;
642 FREEPTR(np_copy);
643 if (isproxy == 0 && urltype == FTP_URL_T) {
644 rval = fetch_ftp(url);
645 goto cleanup_fetch_url;
649 if (isproxy) {
650 if (restart_point) {
651 warnx("Can't restart via proxy URL `%s'",
652 proxyenv);
653 goto cleanup_fetch_url;
655 if (parse_url(proxyenv, "proxy URL", &purltype,
656 &puser, &ppass, &phost, &pport, &pportnum,
657 &ppath) == -1)
658 goto cleanup_fetch_url;
660 if ((purltype != HTTP_URL_T
661 && purltype != FTP_URL_T) ||
662 EMPTYSTRING(phost) ||
663 (! EMPTYSTRING(ppath)
664 && strcmp(ppath, "/") != 0)) {
665 warnx("Malformed proxy URL `%s'",
666 proxyenv);
667 FREEPTR(phost);
668 FREEPTR(pport);
669 FREEPTR(ppath);
670 goto cleanup_fetch_url;
672 if (isipv6addr(host) &&
673 strchr(host, '%') != NULL) {
674 warnx(
675 "Scoped address notation `%s' disallowed via web proxy",
676 host);
677 FREEPTR(phost);
678 FREEPTR(pport);
679 FREEPTR(ppath);
680 goto cleanup_fetch_url;
683 FREEPTR(host);
684 host = phost;
685 FREEPTR(port);
686 port = pport;
687 FREEPTR(path);
688 path = ftp_strdup(url);
689 FREEPTR(ppath);
691 } /* ! EMPTYSTRING(proxyenv) */
693 memset(&hints, 0, sizeof(hints));
694 hints.ai_flags = 0;
695 hints.ai_family = family;
696 hints.ai_socktype = SOCK_STREAM;
697 hints.ai_protocol = 0;
698 error = getaddrinfo(host, port, &hints, &res0);
699 if (error) {
700 warnx("Can't lookup `%s:%s': %s", host, port,
701 (error == EAI_SYSTEM) ? strerror(errno)
702 : gai_strerror(error));
703 goto cleanup_fetch_url;
705 if (res0->ai_canonname)
706 host = res0->ai_canonname;
708 s = -1;
709 for (res = res0; res; res = res->ai_next) {
710 char hname[NI_MAXHOST], sname[NI_MAXSERV];
712 ai_unmapped(res);
713 if (getnameinfo(res->ai_addr, res->ai_addrlen,
714 hname, sizeof(hname), sname, sizeof(sname),
715 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
716 strlcpy(hname, "?", sizeof(hname));
717 strlcpy(sname, "?", sizeof(sname));
720 if (verbose && res0->ai_next) {
721 fprintf(ttyout, "Trying %s:%s ...\n",
722 hname, sname);
725 s = socket(res->ai_family, SOCK_STREAM,
726 res->ai_protocol);
727 if (s < 0) {
728 warn(
729 "Can't create socket for connection to "
730 "`%s:%s'", hname, sname);
731 continue;
734 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
735 close(s);
736 s = -1;
737 continue;
740 /* success */
741 break;
744 if (s < 0) {
745 warnx("Can't connect to `%s:%s'", host, port);
746 goto cleanup_fetch_url;
749 fin = fdopen(s, "r+");
751 * Construct and send the request.
753 if (verbose)
754 fprintf(ttyout, "Requesting %s\n", url);
755 leading = " (";
756 hasleading = 0;
757 if (isproxy) {
758 if (verbose) {
759 fprintf(ttyout, "%svia %s:%s", leading,
760 host, port);
761 leading = ", ";
762 hasleading++;
764 fprintf(fin, "GET %s HTTP/1.0\r\n", path);
765 if (flushcache)
766 fprintf(fin, "Pragma: no-cache\r\n");
767 } else {
768 fprintf(fin, "GET %s HTTP/1.1\r\n", path);
769 if (strchr(host, ':')) {
770 char *h, *p;
773 * strip off IPv6 scope identifier, since it is
774 * local to the node
776 h = ftp_strdup(host);
777 if (isipv6addr(h) &&
778 (p = strchr(h, '%')) != NULL) {
779 *p = '\0';
781 fprintf(fin, "Host: [%s]", h);
782 free(h);
783 } else
784 fprintf(fin, "Host: %s", host);
785 if (portnum != HTTP_PORT)
786 fprintf(fin, ":%u", portnum);
787 fprintf(fin, "\r\n");
788 fprintf(fin, "Accept: */*\r\n");
789 fprintf(fin, "Connection: close\r\n");
790 if (restart_point) {
791 fputs(leading, ttyout);
792 fprintf(fin, "Range: bytes=" LLF "-\r\n",
793 (LLT)restart_point);
794 fprintf(ttyout, "restarting at " LLF,
795 (LLT)restart_point);
796 leading = ", ";
797 hasleading++;
799 if (flushcache)
800 fprintf(fin, "Cache-Control: no-cache\r\n");
802 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
803 fprintf(fin, "User-Agent: %s\r\n", useragent);
804 } else {
805 fprintf(fin, "User-Agent: %s/%s\r\n",
806 FTP_PRODUCT, FTP_VERSION);
808 if (wwwauth) {
809 if (verbose) {
810 fprintf(ttyout, "%swith authorization",
811 leading);
812 leading = ", ";
813 hasleading++;
815 fprintf(fin, "Authorization: %s\r\n", wwwauth);
817 if (proxyauth) {
818 if (verbose) {
819 fprintf(ttyout,
820 "%swith proxy authorization", leading);
821 leading = ", ";
822 hasleading++;
824 fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
826 if (verbose && hasleading)
827 fputs(")\n", ttyout);
828 fprintf(fin, "\r\n");
829 if (fflush(fin) == EOF) {
830 warn("Writing HTTP request");
831 goto cleanup_fetch_url;
834 /* Read the response */
835 len = getline(fin, buf, sizeof(buf), &errormsg);
836 if (len < 0) {
837 if (*errormsg == '\n')
838 errormsg++;
839 warnx("Receiving HTTP reply: %s", errormsg);
840 goto cleanup_fetch_url;
842 while (len > 0 && (ISLWS(buf[len-1])))
843 buf[--len] = '\0';
844 DPRINTF("fetch_url: received `%s'\n", buf);
846 /* Determine HTTP response code */
847 cp = strchr(buf, ' ');
848 if (cp == NULL)
849 goto improper;
850 else
851 cp++;
852 hcode = strtol(cp, &ep, 10);
853 if (*ep != '\0' && !isspace((unsigned char)*ep))
854 goto improper;
855 message = ftp_strdup(cp);
857 /* Read the rest of the header. */
858 while (1) {
859 len = getline(fin, buf, sizeof(buf), &errormsg);
860 if (len < 0) {
861 if (*errormsg == '\n')
862 errormsg++;
863 warnx("Receiving HTTP reply: %s", errormsg);
864 goto cleanup_fetch_url;
866 while (len > 0 && (ISLWS(buf[len-1])))
867 buf[--len] = '\0';
868 if (len == 0)
869 break;
870 DPRINTF("fetch_url: received `%s'\n", buf);
873 * Look for some headers
876 cp = buf;
878 if (match_token(&cp, "Content-Length:")) {
879 filesize = STRTOLL(cp, &ep, 10);
880 if (filesize < 0 || *ep != '\0')
881 goto improper;
882 DPRINTF("fetch_url: parsed len as: " LLF "\n",
883 (LLT)filesize);
885 } else if (match_token(&cp, "Content-Range:")) {
886 if (! match_token(&cp, "bytes"))
887 goto improper;
889 if (*cp == '*')
890 cp++;
891 else {
892 rangestart = STRTOLL(cp, &ep, 10);
893 if (rangestart < 0 || *ep != '-')
894 goto improper;
895 cp = ep + 1;
896 rangeend = STRTOLL(cp, &ep, 10);
897 if (rangeend < 0 || rangeend < rangestart)
898 goto improper;
899 cp = ep;
901 if (*cp != '/')
902 goto improper;
903 cp++;
904 if (*cp == '*')
905 cp++;
906 else {
907 entitylen = STRTOLL(cp, &ep, 10);
908 if (entitylen < 0)
909 goto improper;
910 cp = ep;
912 if (*cp != '\0')
913 goto improper;
915 #ifndef NO_DEBUG
916 if (ftp_debug) {
917 fprintf(ttyout, "parsed range as: ");
918 if (rangestart == -1)
919 fprintf(ttyout, "*");
920 else
921 fprintf(ttyout, LLF "-" LLF,
922 (LLT)rangestart,
923 (LLT)rangeend);
924 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
926 #endif
927 if (! restart_point) {
928 warnx(
929 "Received unexpected Content-Range header");
930 goto cleanup_fetch_url;
933 } else if (match_token(&cp, "Last-Modified:")) {
934 struct tm parsed;
935 char *t;
937 memset(&parsed, 0, sizeof(parsed));
938 /* RFC1123 */
939 if ((t = strptime(cp,
940 "%a, %d %b %Y %H:%M:%S GMT",
941 &parsed))
942 /* RFC0850 */
943 || (t = strptime(cp,
944 "%a, %d-%b-%y %H:%M:%S GMT",
945 &parsed))
946 /* asctime */
947 || (t = strptime(cp,
948 "%a, %b %d %H:%M:%S %Y",
949 &parsed))) {
950 parsed.tm_isdst = -1;
951 if (*t == '\0')
952 mtime = timegm(&parsed);
953 #ifndef NO_DEBUG
954 if (ftp_debug && mtime != -1) {
955 fprintf(ttyout,
956 "parsed date as: %s",
957 rfc2822time(localtime(&mtime)));
959 #endif
962 } else if (match_token(&cp, "Location:")) {
963 location = ftp_strdup(cp);
964 DPRINTF("fetch_url: parsed location as `%s'\n",
965 cp);
967 } else if (match_token(&cp, "Transfer-Encoding:")) {
968 if (match_token(&cp, "binary")) {
969 warnx(
970 "Bogus transfer encoding `binary' (fetching anyway)");
971 continue;
973 if (! (token = match_token(&cp, "chunked"))) {
974 warnx(
975 "Unsupported transfer encoding `%s'",
976 token);
977 goto cleanup_fetch_url;
979 ischunked++;
980 DPRINTF("fetch_url: using chunked encoding\n");
982 } else if (match_token(&cp, "Proxy-Authenticate:")
983 || match_token(&cp, "WWW-Authenticate:")) {
984 if (! (token = match_token(&cp, "Basic"))) {
985 DPRINTF(
986 "fetch_url: skipping unknown auth scheme `%s'\n",
987 token);
988 continue;
990 FREEPTR(auth);
991 auth = ftp_strdup(token);
992 DPRINTF("fetch_url: parsed auth as `%s'\n", cp);
996 /* finished parsing header */
998 switch (hcode) {
999 case 200:
1000 break;
1001 case 206:
1002 if (! restart_point) {
1003 warnx("Not expecting partial content header");
1004 goto cleanup_fetch_url;
1006 break;
1007 case 300:
1008 case 301:
1009 case 302:
1010 case 303:
1011 case 305:
1012 case 307:
1013 if (EMPTYSTRING(location)) {
1014 warnx(
1015 "No redirection Location provided by server");
1016 goto cleanup_fetch_url;
1018 if (redirect_loop++ > 5) {
1019 warnx("Too many redirections requested");
1020 goto cleanup_fetch_url;
1022 if (hcode == 305) {
1023 if (verbose)
1024 fprintf(ttyout, "Redirected via %s\n",
1025 location);
1026 rval = fetch_url(url, location,
1027 proxyauth, wwwauth);
1028 } else {
1029 if (verbose)
1030 fprintf(ttyout, "Redirected to %s\n",
1031 location);
1032 rval = go_fetch(location);
1034 goto cleanup_fetch_url;
1035 #ifndef NO_AUTH
1036 case 401:
1037 case 407:
1039 char **authp;
1040 char *auser, *apass;
1042 if (hcode == 401) {
1043 authp = &wwwauth;
1044 auser = user;
1045 apass = pass;
1046 } else {
1047 authp = &proxyauth;
1048 auser = puser;
1049 apass = ppass;
1051 if (verbose || *authp == NULL ||
1052 auser == NULL || apass == NULL)
1053 fprintf(ttyout, "%s\n", message);
1054 if (EMPTYSTRING(auth)) {
1055 warnx(
1056 "No authentication challenge provided by server");
1057 goto cleanup_fetch_url;
1059 if (*authp != NULL) {
1060 char reply[10];
1062 fprintf(ttyout,
1063 "Authorization failed. Retry (y/n)? ");
1064 if (getline(stdin, reply, sizeof(reply), NULL)
1065 < 0) {
1066 goto cleanup_fetch_url;
1068 if (tolower((unsigned char)reply[0]) != 'y')
1069 goto cleanup_fetch_url;
1070 auser = NULL;
1071 apass = NULL;
1073 if (auth_url(auth, authp, auser, apass) == 0) {
1074 rval = fetch_url(url, proxyenv,
1075 proxyauth, wwwauth);
1076 memset(*authp, 0, strlen(*authp));
1077 FREEPTR(*authp);
1079 goto cleanup_fetch_url;
1081 #endif
1082 default:
1083 if (message)
1084 warnx("Error retrieving file `%s'", message);
1085 else
1086 warnx("Unknown error retrieving file");
1087 goto cleanup_fetch_url;
1089 } /* end of ftp:// or http:// specific setup */
1091 /* Open the output file. */
1092 if (strcmp(savefile, "-") == 0) {
1093 fout = stdout;
1094 } else if (*savefile == '|') {
1095 oldintp = xsignal(SIGPIPE, SIG_IGN);
1096 fout = popen(savefile + 1, "w");
1097 if (fout == NULL) {
1098 warn("Can't execute `%s'", savefile + 1);
1099 goto cleanup_fetch_url;
1101 closefunc = pclose;
1102 } else {
1103 if ((rangeend != -1 && rangeend <= restart_point) ||
1104 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1105 /* already done */
1106 if (verbose)
1107 fprintf(ttyout, "already done\n");
1108 rval = 0;
1109 goto cleanup_fetch_url;
1111 if (restart_point && rangestart != -1) {
1112 if (entitylen != -1)
1113 filesize = entitylen;
1114 if (rangestart != restart_point) {
1115 warnx(
1116 "Size of `%s' differs from save file `%s'",
1117 url, savefile);
1118 goto cleanup_fetch_url;
1120 fout = fopen(savefile, "a");
1121 } else
1122 fout = fopen(savefile, "w");
1123 if (fout == NULL) {
1124 warn("Can't open `%s'", savefile);
1125 goto cleanup_fetch_url;
1127 closefunc = fclose;
1130 /* Trap signals */
1131 if (sigsetjmp(httpabort, 1))
1132 goto cleanup_fetch_url;
1133 (void)xsignal(SIGQUIT, psummary);
1134 oldintr = xsignal(SIGINT, aborthttp);
1136 if (rcvbuf_size > bufsize) {
1137 if (xferbuf)
1138 (void)free(xferbuf);
1139 bufsize = rcvbuf_size;
1140 xferbuf = ftp_malloc(bufsize);
1143 bytes = 0;
1144 hashbytes = mark;
1145 progressmeter(-1);
1147 /* Finally, suck down the file. */
1148 do {
1149 long chunksize;
1150 short lastchunk;
1152 chunksize = 0;
1153 lastchunk = 0;
1154 /* read chunk-size */
1155 if (ischunked) {
1156 if (fgets(xferbuf, bufsize, fin) == NULL) {
1157 warnx("Unexpected EOF reading chunk-size");
1158 goto cleanup_fetch_url;
1160 errno = 0;
1161 chunksize = strtol(xferbuf, &ep, 16);
1162 if (ep == xferbuf) {
1163 warnx("Invalid chunk-size");
1164 goto cleanup_fetch_url;
1166 if (errno == ERANGE || chunksize < 0) {
1167 errno = ERANGE;
1168 warn("Chunk-size `%.*s'",
1169 (int)(ep-xferbuf), xferbuf);
1170 goto cleanup_fetch_url;
1174 * XXX: Work around bug in Apache 1.3.9 and
1175 * 1.3.11, which incorrectly put trailing
1176 * space after the chunk-size.
1178 while (*ep == ' ')
1179 ep++;
1181 /* skip [ chunk-ext ] */
1182 if (*ep == ';') {
1183 while (*ep && *ep != '\r')
1184 ep++;
1187 if (strcmp(ep, "\r\n") != 0) {
1188 warnx("Unexpected data following chunk-size");
1189 goto cleanup_fetch_url;
1191 DPRINTF("fetch_url: got chunk-size of " LLF "\n",
1192 (LLT)chunksize);
1193 if (chunksize == 0) {
1194 lastchunk = 1;
1195 goto chunkdone;
1198 /* transfer file or chunk */
1199 while (1) {
1200 struct timeval then, now, td;
1201 off_t bufrem;
1203 if (rate_get)
1204 (void)gettimeofday(&then, NULL);
1205 bufrem = rate_get ? rate_get : bufsize;
1206 if (ischunked)
1207 bufrem = MIN(chunksize, bufrem);
1208 while (bufrem > 0) {
1209 len = fread(xferbuf, sizeof(char),
1210 MIN(bufsize, bufrem), fin);
1211 if (len <= 0)
1212 goto chunkdone;
1213 bytes += len;
1214 bufrem -= len;
1215 if (fwrite(xferbuf, sizeof(char), len, fout)
1216 != len) {
1217 warn("Writing `%s'", savefile);
1218 goto cleanup_fetch_url;
1220 if (hash && !progress) {
1221 while (bytes >= hashbytes) {
1222 (void)putc('#', ttyout);
1223 hashbytes += mark;
1225 (void)fflush(ttyout);
1227 if (ischunked) {
1228 chunksize -= len;
1229 if (chunksize <= 0)
1230 break;
1233 if (rate_get) {
1234 while (1) {
1235 (void)gettimeofday(&now, NULL);
1236 timersub(&now, &then, &td);
1237 if (td.tv_sec > 0)
1238 break;
1239 usleep(1000000 - td.tv_usec);
1242 if (ischunked && chunksize <= 0)
1243 break;
1245 /* read CRLF after chunk*/
1246 chunkdone:
1247 if (ischunked) {
1248 if (fgets(xferbuf, bufsize, fin) == NULL) {
1249 warnx("Unexpected EOF reading chunk CRLF");
1250 goto cleanup_fetch_url;
1252 if (strcmp(xferbuf, "\r\n") != 0) {
1253 warnx("Unexpected data following chunk");
1254 goto cleanup_fetch_url;
1256 if (lastchunk)
1257 break;
1259 } while (ischunked);
1261 /* XXX: deal with optional trailer & CRLF here? */
1263 if (hash && !progress && bytes > 0) {
1264 if (bytes < mark)
1265 (void)putc('#', ttyout);
1266 (void)putc('\n', ttyout);
1268 if (ferror(fin)) {
1269 warn("Reading file");
1270 goto cleanup_fetch_url;
1272 progressmeter(1);
1273 (void)fflush(fout);
1274 if (closefunc == fclose && mtime != -1) {
1275 struct timeval tval[2];
1277 (void)gettimeofday(&tval[0], NULL);
1278 tval[1].tv_sec = mtime;
1279 tval[1].tv_usec = 0;
1280 (*closefunc)(fout);
1281 fout = NULL;
1283 if (utimes(savefile, tval) == -1) {
1284 fprintf(ttyout,
1285 "Can't change modification time to %s",
1286 rfc2822time(localtime(&mtime)));
1289 if (bytes > 0)
1290 ptransfer(0);
1291 bytes = 0;
1293 rval = 0;
1294 goto cleanup_fetch_url;
1296 improper:
1297 warnx("Improper response from `%s:%s'", host, port);
1299 cleanup_fetch_url:
1300 if (oldintr)
1301 (void)xsignal(SIGINT, oldintr);
1302 if (oldintp)
1303 (void)xsignal(SIGPIPE, oldintp);
1304 if (fin != NULL)
1305 fclose(fin);
1306 else if (s != -1)
1307 close(s);
1308 if (closefunc != NULL && fout != NULL)
1309 (*closefunc)(fout);
1310 if (res0)
1311 freeaddrinfo(res0);
1312 FREEPTR(savefile);
1313 FREEPTR(user);
1314 if (pass != NULL)
1315 memset(pass, 0, strlen(pass));
1316 FREEPTR(pass);
1317 FREEPTR(host);
1318 FREEPTR(port);
1319 FREEPTR(path);
1320 FREEPTR(decodedpath);
1321 FREEPTR(puser);
1322 if (ppass != NULL)
1323 memset(ppass, 0, strlen(ppass));
1324 FREEPTR(ppass);
1325 FREEPTR(auth);
1326 FREEPTR(location);
1327 FREEPTR(message);
1328 return (rval);
1332 * Abort a HTTP retrieval
1334 void
1335 aborthttp(int notused)
1337 char msgbuf[100];
1338 size_t len;
1340 sigint_raised = 1;
1341 alarmtimer(0);
1342 len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1343 write(fileno(ttyout), msgbuf, len);
1344 siglongjmp(httpabort, 1);
1348 * Retrieve ftp URL or classic ftp argument using FTP.
1349 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1350 * is still open (e.g, ftp xfer with trailing /)
1352 static int
1353 fetch_ftp(const char *url)
1355 char *cp, *xargv[5], rempath[MAXPATHLEN];
1356 char *host, *path, *dir, *file, *user, *pass;
1357 char *port;
1358 int dirhasglob, filehasglob, rval, type, xargc;
1359 int oanonftp, oautologin;
1360 in_port_t portnum;
1361 url_t urltype;
1363 DPRINTF("fetch_ftp: `%s'\n", url);
1364 host = path = dir = file = user = pass = NULL;
1365 port = NULL;
1366 rval = 1;
1367 type = TYPE_I;
1369 if (STRNEQUAL(url, FTP_URL)) {
1370 if ((parse_url(url, "URL", &urltype, &user, &pass,
1371 &host, &port, &portnum, &path) == -1) ||
1372 (user != NULL && *user == '\0') ||
1373 EMPTYSTRING(host)) {
1374 warnx("Invalid URL `%s'", url);
1375 goto cleanup_fetch_ftp;
1378 * Note: Don't url_decode(path) here. We need to keep the
1379 * distinction between "/" and "%2F" until later.
1382 /* check for trailing ';type=[aid]' */
1383 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1384 if (strcasecmp(cp, ";type=a") == 0)
1385 type = TYPE_A;
1386 else if (strcasecmp(cp, ";type=i") == 0)
1387 type = TYPE_I;
1388 else if (strcasecmp(cp, ";type=d") == 0) {
1389 warnx(
1390 "Directory listing via a URL is not supported");
1391 goto cleanup_fetch_ftp;
1392 } else {
1393 warnx("Invalid suffix `%s' in URL `%s'", cp,
1394 url);
1395 goto cleanup_fetch_ftp;
1397 *cp = 0;
1399 } else { /* classic style `[user@]host:[file]' */
1400 urltype = CLASSIC_URL_T;
1401 host = ftp_strdup(url);
1402 cp = strchr(host, '@');
1403 if (cp != NULL) {
1404 *cp = '\0';
1405 user = host;
1406 anonftp = 0; /* disable anonftp */
1407 host = ftp_strdup(cp + 1);
1409 cp = strchr(host, ':');
1410 if (cp != NULL) {
1411 *cp = '\0';
1412 path = ftp_strdup(cp + 1);
1415 if (EMPTYSTRING(host))
1416 goto cleanup_fetch_ftp;
1418 /* Extract the file and (if present) directory name. */
1419 dir = path;
1420 if (! EMPTYSTRING(dir)) {
1422 * If we are dealing with classic `[user@]host:[path]' syntax,
1423 * then a path of the form `/file' (resulting from input of the
1424 * form `host:/file') means that we should do "CWD /" before
1425 * retrieving the file. So we set dir="/" and file="file".
1427 * But if we are dealing with URLs like `ftp://host/path' then
1428 * a path of the form `/file' (resulting from a URL of the form
1429 * `ftp://host//file') means that we should do `CWD ' (with an
1430 * empty argument) before retrieving the file. So we set
1431 * dir="" and file="file".
1433 * If the path does not contain / at all, we set dir=NULL.
1434 * (We get a path without any slashes if we are dealing with
1435 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1437 * In all other cases, we set dir to a string that does not
1438 * include the final '/' that separates the dir part from the
1439 * file part of the path. (This will be the empty string if
1440 * and only if we are dealing with a path of the form `/file'
1441 * resulting from an URL of the form `ftp://host//file'.)
1443 cp = strrchr(dir, '/');
1444 if (cp == dir && urltype == CLASSIC_URL_T) {
1445 file = cp + 1;
1446 dir = "/";
1447 } else if (cp != NULL) {
1448 *cp++ = '\0';
1449 file = cp;
1450 } else {
1451 file = dir;
1452 dir = NULL;
1454 } else
1455 dir = NULL;
1456 if (urltype == FTP_URL_T && file != NULL) {
1457 url_decode(file);
1458 /* but still don't url_decode(dir) */
1460 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1461 "path `%s' dir `%s' file `%s'\n",
1462 STRorNULL(user), STRorNULL(pass),
1463 STRorNULL(host), STRorNULL(port),
1464 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
1466 dirhasglob = filehasglob = 0;
1467 if (doglob && urltype == CLASSIC_URL_T) {
1468 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1469 dirhasglob = 1;
1470 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1471 filehasglob = 1;
1474 /* Set up the connection */
1475 oanonftp = anonftp;
1476 if (connected)
1477 disconnect(0, NULL);
1478 anonftp = oanonftp;
1479 xargv[0] = (char *)getprogname(); /* XXX discards const */
1480 xargv[1] = host;
1481 xargv[2] = NULL;
1482 xargc = 2;
1483 if (port) {
1484 xargv[2] = port;
1485 xargv[3] = NULL;
1486 xargc = 3;
1488 oautologin = autologin;
1489 /* don't autologin in setpeer(), use ftp_login() below */
1490 autologin = 0;
1491 setpeer(xargc, xargv);
1492 autologin = oautologin;
1493 if ((connected == 0) ||
1494 (connected == 1 && !ftp_login(host, user, pass))) {
1495 warnx("Can't connect or login to host `%s:%s'", host, port);
1496 goto cleanup_fetch_ftp;
1499 switch (type) {
1500 case TYPE_A:
1501 setascii(1, xargv);
1502 break;
1503 case TYPE_I:
1504 setbinary(1, xargv);
1505 break;
1506 default:
1507 errx(1, "fetch_ftp: unknown transfer type %d", type);
1511 * Change directories, if necessary.
1513 * Note: don't use EMPTYSTRING(dir) below, because
1514 * dir=="" means something different from dir==NULL.
1516 if (dir != NULL && !dirhasglob) {
1517 char *nextpart;
1520 * If we are dealing with a classic `[user@]host:[path]'
1521 * (urltype is CLASSIC_URL_T) then we have a raw directory
1522 * name (not encoded in any way) and we can change
1523 * directories in one step.
1525 * If we are dealing with an `ftp://host/path' URL
1526 * (urltype is FTP_URL_T), then RFC3986 says we need to
1527 * send a separate CWD command for each unescaped "/"
1528 * in the path, and we have to interpret %hex escaping
1529 * *after* we find the slashes. It's possible to get
1530 * empty components here, (from multiple adjacent
1531 * slashes in the path) and RFC3986 says that we should
1532 * still do `CWD ' (with a null argument) in such cases.
1534 * Many ftp servers don't support `CWD ', so if there's an
1535 * error performing that command, bail out with a descriptive
1536 * message.
1538 * Examples:
1540 * host: dir="", urltype=CLASSIC_URL_T
1541 * logged in (to default directory)
1542 * host:file dir=NULL, urltype=CLASSIC_URL_T
1543 * "RETR file"
1544 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1545 * "CWD dir", logged in
1546 * ftp://host/ dir="", urltype=FTP_URL_T
1547 * logged in (to default directory)
1548 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1549 * "CWD dir", logged in
1550 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1551 * "RETR file"
1552 * ftp://host//file dir="", urltype=FTP_URL_T
1553 * "CWD ", "RETR file"
1554 * host:/file dir="/", urltype=CLASSIC_URL_T
1555 * "CWD /", "RETR file"
1556 * ftp://host///file dir="/", urltype=FTP_URL_T
1557 * "CWD ", "CWD ", "RETR file"
1558 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1559 * "CWD /", "RETR file"
1560 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1561 * "CWD foo", "RETR file"
1562 * ftp://host/foo/bar/file dir="foo/bar"
1563 * "CWD foo", "CWD bar", "RETR file"
1564 * ftp://host//foo/bar/file dir="/foo/bar"
1565 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1566 * ftp://host/foo//bar/file dir="foo//bar"
1567 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1568 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1569 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1570 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1571 * "CWD /foo", "CWD bar", "RETR file"
1572 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1573 * "CWD /foo/bar", "RETR file"
1574 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1575 * "RETR /foo/bar/file"
1577 * Note that we don't need `dir' after this point.
1579 do {
1580 if (urltype == FTP_URL_T) {
1581 nextpart = strchr(dir, '/');
1582 if (nextpart) {
1583 *nextpart = '\0';
1584 nextpart++;
1586 url_decode(dir);
1587 } else
1588 nextpart = NULL;
1589 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n",
1590 STRorNULL(dir), STRorNULL(nextpart));
1591 if (urltype == FTP_URL_T || *dir != '\0') {
1592 xargv[0] = "cd";
1593 xargv[1] = dir;
1594 xargv[2] = NULL;
1595 dirchange = 0;
1596 cd(2, xargv);
1597 if (! dirchange) {
1598 if (*dir == '\0' && code == 500)
1599 fprintf(stderr,
1600 "\n"
1601 "ftp: The `CWD ' command (without a directory), which is required by\n"
1602 " RFC3986 to support the empty directory in the URL pathname (`//'),\n"
1603 " conflicts with the server's conformance to RFC0959.\n"
1604 " Try the same URL without the `//' in the URL pathname.\n"
1605 "\n");
1606 goto cleanup_fetch_ftp;
1609 dir = nextpart;
1610 } while (dir != NULL);
1613 if (EMPTYSTRING(file)) {
1614 rval = -1;
1615 goto cleanup_fetch_ftp;
1618 if (dirhasglob) {
1619 (void)strlcpy(rempath, dir, sizeof(rempath));
1620 (void)strlcat(rempath, "/", sizeof(rempath));
1621 (void)strlcat(rempath, file, sizeof(rempath));
1622 file = rempath;
1625 /* Fetch the file(s). */
1626 xargc = 2;
1627 xargv[0] = "get";
1628 xargv[1] = file;
1629 xargv[2] = NULL;
1630 if (dirhasglob || filehasglob) {
1631 int ointeractive;
1633 ointeractive = interactive;
1634 interactive = 0;
1635 if (restartautofetch)
1636 xargv[0] = "mreget";
1637 else
1638 xargv[0] = "mget";
1639 mget(xargc, xargv);
1640 interactive = ointeractive;
1641 } else {
1642 if (outfile == NULL) {
1643 cp = strrchr(file, '/'); /* find savefile */
1644 if (cp != NULL)
1645 outfile = cp + 1;
1646 else
1647 outfile = file;
1649 xargv[2] = (char *)outfile;
1650 xargv[3] = NULL;
1651 xargc++;
1652 if (restartautofetch)
1653 reget(xargc, xargv);
1654 else
1655 get(xargc, xargv);
1658 if ((code / 100) == COMPLETE)
1659 rval = 0;
1661 cleanup_fetch_ftp:
1662 FREEPTR(port);
1663 FREEPTR(host);
1664 FREEPTR(path);
1665 FREEPTR(user);
1666 if (pass)
1667 memset(pass, 0, strlen(pass));
1668 FREEPTR(pass);
1669 return (rval);
1673 * Retrieve the given file to outfile.
1674 * Supports arguments of the form:
1675 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1676 * call fetch_ftp()
1677 * "http://host/path" call fetch_url() to use HTTP
1678 * "file:///path" call fetch_url() to copy
1679 * "about:..." print a message
1681 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1682 * is still open (e.g, ftp xfer with trailing /)
1684 static int
1685 go_fetch(const char *url)
1687 char *proxy;
1689 #ifndef NO_ABOUT
1691 * Check for about:*
1693 if (STRNEQUAL(url, ABOUT_URL)) {
1694 url += sizeof(ABOUT_URL) -1;
1695 if (strcasecmp(url, "ftp") == 0 ||
1696 strcasecmp(url, "tnftp") == 0) {
1697 fputs(
1698 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1699 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1700 } else if (strcasecmp(url, "lukem") == 0) {
1701 fputs(
1702 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1703 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1704 } else if (strcasecmp(url, "netbsd") == 0) {
1705 fputs(
1706 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1707 "For more information, see http://www.NetBSD.org/\n", ttyout);
1708 } else if (strcasecmp(url, "version") == 0) {
1709 fprintf(ttyout, "Version: %s %s%s\n",
1710 FTP_PRODUCT, FTP_VERSION,
1711 #ifdef INET6
1713 #else
1714 " (-IPv6)"
1715 #endif
1717 } else {
1718 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1720 fputs("\n", ttyout);
1721 return (0);
1723 #endif
1726 * Check for file:// and http:// URLs.
1728 if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1729 return (fetch_url(url, NULL, NULL, NULL));
1732 * Try FTP URL-style and host:file arguments next.
1733 * If ftpproxy is set with an FTP URL, use fetch_url()
1734 * Othewise, use fetch_ftp().
1736 proxy = getoptionvalue("ftp_proxy");
1737 if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
1738 return (fetch_url(url, NULL, NULL, NULL));
1740 return (fetch_ftp(url));
1744 * Retrieve multiple files from the command line,
1745 * calling go_fetch() for each file.
1747 * If an ftp path has a trailing "/", the path will be cd-ed into and
1748 * the connection remains open, and the function will return -1
1749 * (to indicate the connection is alive).
1750 * If an error occurs the return value will be the offset+1 in
1751 * argv[] of the file that caused a problem (i.e, argv[x]
1752 * returns x+1)
1753 * Otherwise, 0 is returned if all files retrieved successfully.
1756 auto_fetch(int argc, char *argv[])
1758 volatile int argpos, rval;
1760 argpos = rval = 0;
1762 if (sigsetjmp(toplevel, 1)) {
1763 if (connected)
1764 disconnect(0, NULL);
1765 if (rval > 0)
1766 rval = argpos + 1;
1767 return (rval);
1769 (void)xsignal(SIGINT, intr);
1770 (void)xsignal(SIGPIPE, lostpeer);
1773 * Loop through as long as there's files to fetch.
1775 for (; (rval == 0) && (argpos < argc); argpos++) {
1776 if (strchr(argv[argpos], ':') == NULL)
1777 break;
1778 redirect_loop = 0;
1779 if (!anonftp)
1780 anonftp = 2; /* Handle "automatic" transfers. */
1781 rval = go_fetch(argv[argpos]);
1782 if (outfile != NULL && strcmp(outfile, "-") != 0
1783 && outfile[0] != '|')
1784 outfile = NULL;
1785 if (rval > 0)
1786 rval = argpos + 1;
1789 if (connected && rval != -1)
1790 disconnect(0, NULL);
1791 return (rval);
1796 * Upload multiple files from the command line.
1798 * If an error occurs the return value will be the offset+1 in
1799 * argv[] of the file that caused a problem (i.e, argv[x]
1800 * returns x+1)
1801 * Otherwise, 0 is returned if all files uploaded successfully.
1804 auto_put(int argc, char **argv, const char *uploadserver)
1806 char *uargv[4], *path, *pathsep;
1807 int uargc, rval, argpos;
1808 size_t len;
1810 uargc = 0;
1811 uargv[uargc++] = "mput";
1812 uargv[uargc++] = argv[0];
1813 uargv[2] = uargv[3] = NULL;
1814 pathsep = NULL;
1815 rval = 1;
1817 DPRINTF("auto_put: target `%s'\n", uploadserver);
1819 path = ftp_strdup(uploadserver);
1820 len = strlen(path);
1821 if (path[len - 1] != '/' && path[len - 1] != ':') {
1823 * make sure we always pass a directory to auto_fetch
1825 if (argc > 1) { /* more than one file to upload */
1826 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1827 free(path);
1828 path = (char *)ftp_malloc(len);
1829 (void)strlcpy(path, uploadserver, len);
1830 (void)strlcat(path, "/", len);
1831 } else { /* single file to upload */
1832 uargv[0] = "put";
1833 pathsep = strrchr(path, '/');
1834 if (pathsep == NULL) {
1835 pathsep = strrchr(path, ':');
1836 if (pathsep == NULL) {
1837 warnx("Invalid URL `%s'", path);
1838 goto cleanup_auto_put;
1840 pathsep++;
1841 uargv[2] = ftp_strdup(pathsep);
1842 pathsep[0] = '/';
1843 } else
1844 uargv[2] = ftp_strdup(pathsep + 1);
1845 pathsep[1] = '\0';
1846 uargc++;
1849 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1850 path, STRorNULL(uargv[2]));
1852 /* connect and cwd */
1853 rval = auto_fetch(1, &path);
1854 if(rval >= 0)
1855 goto cleanup_auto_put;
1857 rval = 0;
1859 /* target filename provided; upload 1 file */
1860 /* XXX : is this the best way? */
1861 if (uargc == 3) {
1862 uargv[1] = argv[0];
1863 put(uargc, uargv);
1864 if ((code / 100) != COMPLETE)
1865 rval = 1;
1866 } else { /* otherwise a target dir: upload all files to it */
1867 for(argpos = 0; argv[argpos] != NULL; argpos++) {
1868 uargv[1] = argv[argpos];
1869 mput(uargc, uargv);
1870 if ((code / 100) != COMPLETE) {
1871 rval = argpos + 1;
1872 break;
1877 cleanup_auto_put:
1878 free(path);
1879 FREEPTR(uargv[2]);
1880 return (rval);