1/*	$NetBSD: fetch.c,v 1.15 2007/08/06 04:33:23 lukem Exp $	*/
2/*	from	NetBSD: fetch.c,v 1.180 2007/06/05 00:31:20 lukem Exp	*/
3
4/*-
5 * Copyright (c) 1997-2007 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Luke Mewburn.
10 *
11 * This code is derived from software contributed to The NetBSD Foundation
12 * by Scott Aaron Bamford.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 *    must display the following acknowledgement:
24 *	This product includes software developed by the NetBSD
25 *	Foundation, Inc. and its contributors.
26 * 4. Neither the name of The NetBSD Foundation nor the names of its
27 *    contributors may be used to endorse or promote products derived
28 *    from this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43#include "tnftp.h"
44
45#if 0	/* tnftp */
46
47#include <sys/cdefs.h>
48#ifndef lint
49__RCSID(" NetBSD: fetch.c,v 1.180 2007/06/05 00:31:20 lukem Exp  ");
50#endif /* not lint */
51
52/*
53 * FTP User Program -- Command line file retrieval
54 */
55
56#include <sys/types.h>
57#include <sys/param.h>
58#include <sys/socket.h>
59#include <sys/stat.h>
60#include <sys/time.h>
61
62#include <netinet/in.h>
63
64#include <arpa/ftp.h>
65#include <arpa/inet.h>
66
67#include <ctype.h>
68#include <err.h>
69#include <errno.h>
70#include <netdb.h>
71#include <fcntl.h>
72#include <stdio.h>
73#include <stdlib.h>
74#include <string.h>
75#include <unistd.h>
76#include <time.h>
77
78#endif	/* tnftp */
79
80#include "ftp_var.h"
81#include "version.h"
82
83typedef enum {
84	UNKNOWN_URL_T=-1,
85	HTTP_URL_T,
86	FTP_URL_T,
87	FILE_URL_T,
88	CLASSIC_URL_T
89} url_t;
90
91void		aborthttp(int);
92#ifndef NO_AUTH
93static int	auth_url(const char *, char **, const char *, const char *);
94static void	base64_encode(const unsigned char *, size_t, unsigned char *);
95#endif
96static int	go_fetch(const char *);
97static int	fetch_ftp(const char *);
98static int	fetch_url(const char *, const char *, char *, char *);
99static const char *match_token(const char **, const char *);
100static int	parse_url(const char *, const char *, url_t *, char **,
101			    char **, char **, char **, in_port_t *, char **);
102static void	url_decode(char *);
103
104static int	redirect_loop;
105
106
107#define	STRNEQUAL(a,b)	(strncasecmp((a), (b), sizeof((b))-1) == 0)
108#define	ISLWS(x)	((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
109#define	SKIPLWS(x)	do { while (ISLWS((*x))) x++; } while (0)
110
111
112#define	ABOUT_URL	"about:"	/* propaganda */
113#define	FILE_URL	"file://"	/* file URL prefix */
114#define	FTP_URL		"ftp://"	/* ftp URL prefix */
115#define	HTTP_URL	"http://"	/* http URL prefix */
116
117
118/*
119 * Determine if token is the next word in buf (case insensitive).
120 * If so, advance buf past the token and any trailing LWS, and
121 * return a pointer to the token (in buf).  Otherwise, return NULL.
122 * token may be preceded by LWS.
123 * token must be followed by LWS or NUL.  (I.e, don't partial match).
124 */
125static const char *
126match_token(const char **buf, const char *token)
127{
128	const char	*p, *orig;
129	size_t		tlen;
130
131	tlen = strlen(token);
132	p = *buf;
133	SKIPLWS(p);
134	orig = p;
135	if (strncasecmp(p, token, tlen) != 0)
136		return NULL;
137	p += tlen;
138	if (*p != '\0' && !ISLWS(*p))
139		return NULL;
140	SKIPLWS(p);
141	orig = *buf;
142	*buf = p;
143	return orig;
144}
145
146#ifndef NO_AUTH
147/*
148 * Generate authorization response based on given authentication challenge.
149 * Returns -1 if an error occurred, otherwise 0.
150 * Sets response to a malloc(3)ed string; caller should free.
151 */
152static int
153auth_url(const char *challenge, char **response, const char *guser,
154	const char *gpass)
155{
156	const char	*cp, *scheme, *errormsg;
157	char		*ep, *clear, *realm;
158	char		 user[BUFSIZ], *pass;
159	int		 rval;
160	size_t		 len, clen, rlen;
161
162	*response = NULL;
163	clear = realm = NULL;
164	rval = -1;
165	cp = challenge;
166	scheme = "Basic";	/* only support Basic authentication */
167
168	DPRINTF("auth_url: challenge `%s'\n", challenge);
169
170	if (! match_token(&cp, scheme)) {
171		warnx("Unsupported authentication challenge `%s'",
172		    challenge);
173		goto cleanup_auth_url;
174	}
175
176#define	REALM "realm=\""
177	if (STRNEQUAL(cp, REALM))
178		cp += sizeof(REALM) - 1;
179	else {
180		warnx("Unsupported authentication challenge `%s'",
181		    challenge);
182		goto cleanup_auth_url;
183	}
184/* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
185	if ((ep = strchr(cp, '\"')) != NULL) {
186		size_t len = ep - cp;
187
188		realm = (char *)ftp_malloc(len + 1);
189		(void)strlcpy(realm, cp, len + 1);
190	} else {
191		warnx("Unsupported authentication challenge `%s'",
192		    challenge);
193		goto cleanup_auth_url;
194	}
195
196	fprintf(ttyout, "Username for `%s': ", realm);
197	if (guser != NULL) {
198		(void)strlcpy(user, guser, sizeof(user));
199		fprintf(ttyout, "%s\n", user);
200	} else {
201		(void)fflush(ttyout);
202		if (get_line(stdin, user, sizeof(user), &errormsg) < 0) {
203			warnx("%s; can't authenticate", errormsg);
204			goto cleanup_auth_url;
205		}
206	}
207	if (gpass != NULL)
208		pass = (char *)gpass;
209	else {
210		pass = getpass("Password: ");
211		if (pass == NULL) {
212			warnx("Can't read password");
213			goto cleanup_auth_url;
214		}
215	}
216
217	clen = strlen(user) + strlen(pass) + 2;	/* user + ":" + pass + "\0" */
218	clear = (char *)ftp_malloc(clen);
219	(void)strlcpy(clear, user, clen);
220	(void)strlcat(clear, ":", clen);
221	(void)strlcat(clear, pass, clen);
222	if (gpass == NULL)
223		memset(pass, 0, strlen(pass));
224
225						/* scheme + " " + enc + "\0" */
226	rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
227	*response = (char *)ftp_malloc(rlen);
228	(void)strlcpy(*response, scheme, rlen);
229	len = strlcat(*response, " ", rlen);
230			/* use  `clen - 1'  to not encode the trailing NUL */
231	base64_encode((unsigned char *)clear, clen - 1,
232	    (unsigned char *)*response + len);
233	memset(clear, 0, clen);
234	rval = 0;
235
236 cleanup_auth_url:
237	FREEPTR(clear);
238	FREEPTR(realm);
239	return (rval);
240}
241
242/*
243 * Encode len bytes starting at clear using base64 encoding into encoded,
244 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
245 */
246static void
247base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
248{
249	static const unsigned char enc[] =
250	    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
251	unsigned char	*cp;
252	int	 i;
253
254	cp = encoded;
255	for (i = 0; i < len; i += 3) {
256		*(cp++) = enc[((clear[i + 0] >> 2))];
257		*(cp++) = enc[((clear[i + 0] << 4) & 0x30)
258			    | ((clear[i + 1] >> 4) & 0x0f)];
259		*(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
260			    | ((clear[i + 2] >> 6) & 0x03)];
261		*(cp++) = enc[((clear[i + 2]     ) & 0x3f)];
262	}
263	*cp = '\0';
264	while (i-- > len)
265		*(--cp) = '=';
266}
267#endif
268
269/*
270 * Decode %xx escapes in given string, `in-place'.
271 */
272static void
273url_decode(char *url)
274{
275	unsigned char *p, *q;
276
277	if (EMPTYSTRING(url))
278		return;
279	p = q = (unsigned char *)url;
280
281#define	HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
282	while (*p) {
283		if (p[0] == '%'
284		    && p[1] && isxdigit((unsigned char)p[1])
285		    && p[2] && isxdigit((unsigned char)p[2])) {
286			*q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
287			p+=3;
288		} else
289			*q++ = *p++;
290	}
291	*q = '\0';
292}
293
294
295/*
296 * Parse URL of form (per RFC3986):
297 *	<type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
298 * Returns -1 if a parse error occurred, otherwise 0.
299 * It's the caller's responsibility to url_decode() the returned
300 * user, pass and path.
301 *
302 * Sets type to url_t, each of the given char ** pointers to a
303 * malloc(3)ed strings of the relevant section, and port to
304 * the number given, or ftpport if ftp://, or httpport if http://.
305 *
306 * XXX: this is not totally RFC3986 compliant; <path> will have the
307 * leading `/' unless it's an ftp:// URL, as this makes things easier
308 * for file:// and http:// URLs.  ftp:// URLs have the `/' between the
309 * host and the URL-path removed, but any additional leading slashes
310 * in the URL-path are retained (because they imply that we should
311 * later do "CWD" with a null argument).
312 *
313 * Examples:
314 *	 input URL			 output path
315 *	 ---------			 -----------
316 *	"http://host"			"/"
317 *	"http://host/"			"/"
318 *	"http://host/path"		"/path"
319 *	"file://host/dir/file"		"dir/file"
320 *	"ftp://host"			""
321 *	"ftp://host/"			""
322 *	"ftp://host//"			"/"
323 *	"ftp://host/dir/file"		"dir/file"
324 *	"ftp://host//dir/file"		"/dir/file"
325 */
326static int
327parse_url(const char *url, const char *desc, url_t *type,
328		char **user, char **pass, char **host, char **port,
329		in_port_t *portnum, char **path)
330{
331	const char	*origurl;
332	char		*cp, *ep, *thost, *tport;
333	size_t		 len;
334
335	if (url == NULL || desc == NULL || type == NULL || user == NULL
336	    || pass == NULL || host == NULL || port == NULL || portnum == NULL
337	    || path == NULL)
338		errx(1, "parse_url: invoked with NULL argument!");
339
340	origurl = url;
341	*type = UNKNOWN_URL_T;
342	*user = *pass = *host = *port = *path = NULL;
343	*portnum = 0;
344	tport = NULL;
345
346	if (STRNEQUAL(url, HTTP_URL)) {
347		url += sizeof(HTTP_URL) - 1;
348		*type = HTTP_URL_T;
349		*portnum = HTTP_PORT;
350		tport = httpport;
351	} else if (STRNEQUAL(url, FTP_URL)) {
352		url += sizeof(FTP_URL) - 1;
353		*type = FTP_URL_T;
354		*portnum = FTP_PORT;
355		tport = ftpport;
356	} else if (STRNEQUAL(url, FILE_URL)) {
357		url += sizeof(FILE_URL) - 1;
358		*type = FILE_URL_T;
359	} else {
360		warnx("Invalid %s `%s'", desc, url);
361 cleanup_parse_url:
362		FREEPTR(*user);
363		if (*pass != NULL)
364			memset(*pass, 0, strlen(*pass));
365		FREEPTR(*pass);
366		FREEPTR(*host);
367		FREEPTR(*port);
368		FREEPTR(*path);
369		return (-1);
370	}
371
372	if (*url == '\0')
373		return (0);
374
375			/* find [user[:pass]@]host[:port] */
376	ep = strchr(url, '/');
377	if (ep == NULL)
378		thost = ftp_strdup(url);
379	else {
380		len = ep - url;
381		thost = (char *)ftp_malloc(len + 1);
382		(void)strlcpy(thost, url, len + 1);
383		if (*type == FTP_URL_T)	/* skip first / for ftp URLs */
384			ep++;
385		*path = ftp_strdup(ep);
386	}
387
388	cp = strchr(thost, '@');	/* look for user[:pass]@ in URLs */
389	if (cp != NULL) {
390		if (*type == FTP_URL_T)
391			anonftp = 0;	/* disable anonftp */
392		*user = thost;
393		*cp = '\0';
394		thost = ftp_strdup(cp + 1);
395		cp = strchr(*user, ':');
396		if (cp != NULL) {
397			*cp = '\0';
398			*pass = ftp_strdup(cp + 1);
399		}
400		url_decode(*user);
401		if (*pass)
402			url_decode(*pass);
403	}
404
405#ifdef INET6
406			/*
407			 * Check if thost is an encoded IPv6 address, as per
408			 * RFC3986:
409			 *	`[' ipv6-address ']'
410			 */
411	if (*thost == '[') {
412		cp = thost + 1;
413		if ((ep = strchr(cp, ']')) == NULL ||
414		    (ep[1] != '\0' && ep[1] != ':')) {
415			warnx("Invalid address `%s' in %s `%s'",
416			    thost, desc, origurl);
417			goto cleanup_parse_url;
418		}
419		len = ep - cp;		/* change `[xyz]' -> `xyz' */
420		memmove(thost, thost + 1, len);
421		thost[len] = '\0';
422		if (! isipv6addr(thost)) {
423			warnx("Invalid IPv6 address `%s' in %s `%s'",
424			    thost, desc, origurl);
425			goto cleanup_parse_url;
426		}
427		cp = ep + 1;
428		if (*cp == ':')
429			cp++;
430		else
431			cp = NULL;
432	} else
433#endif /* INET6 */
434		if ((cp = strchr(thost, ':')) != NULL)
435			*cp++ =  '\0';
436	*host = thost;
437
438			/* look for [:port] */
439	if (cp != NULL) {
440		long	nport;
441
442		nport = parseport(cp, -1);
443		if (nport == -1) {
444			warnx("Unknown port `%s' in %s `%s'",
445			    cp, desc, origurl);
446			goto cleanup_parse_url;
447		}
448		*portnum = nport;
449		tport = cp;
450	}
451
452	if (tport != NULL)
453		*port = ftp_strdup(tport);
454	if (*path == NULL) {
455		const char *emptypath = "/";
456		if (*type == FTP_URL_T)	/* skip first / for ftp URLs */
457			emptypath++;
458		*path = ftp_strdup(emptypath);
459	}
460
461	DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
462	    "path `%s'\n",
463	    *user ? *user : "<null>", *pass ? *pass : "<null>",
464	    *host ? *host : "<null>", *port ? *port : "<null>",
465	    *portnum ? *portnum : -1, *path ? *path : "<null>");
466
467	return (0);
468}
469
470sigjmp_buf	httpabort;
471
472/*
473 * Retrieve URL, via a proxy if necessary, using HTTP.
474 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
475 * http_proxy as appropriate.
476 * Supports HTTP redirects.
477 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
478 * is still open (e.g, ftp xfer with trailing /)
479 */
480static int
481fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
482{
483	struct addrinfo		hints, *res, *res0 = NULL;
484	int			error;
485	char			hbuf[NI_MAXHOST];
486	sigfunc volatile	oldintr;
487	sigfunc volatile	oldintp;
488	int volatile		s;
489	struct stat		sb;
490	int volatile		ischunked;
491	int volatile		isproxy;
492	int volatile		rval;
493	int volatile		hcode;
494	size_t			len;
495	static size_t		bufsize;
496	static char		*xferbuf;
497	const char		*cp, *token;
498	char			*ep;
499	char			buf[FTPBUFLEN];
500	const char		*errormsg;
501	char			*volatile savefile;
502	char			*volatile auth;
503	char			*volatile location;
504	char			*volatile message;
505	char			*user, *pass, *host, *port, *path;
506	char			*volatile decodedpath;
507	char			*puser, *ppass, *useragent;
508	off_t			hashbytes, rangestart, rangeend, entitylen;
509	int			(*volatile closefunc)(FILE *);
510	FILE			*volatile fin;
511	FILE			*volatile fout;
512	time_t			mtime;
513	url_t			urltype;
514	in_port_t		portnum;
515
516	oldintr = oldintp = NULL;
517	closefunc = NULL;
518	fin = fout = NULL;
519	s = -1;
520	savefile = NULL;
521	auth = location = message = NULL;
522	ischunked = isproxy = hcode = 0;
523	rval = 1;
524	user = pass = host = path = decodedpath = puser = ppass = NULL;
525
526	if (parse_url(url, "URL", &urltype, &user, &pass, &host, &port,
527	    &portnum, &path) == -1)
528		goto cleanup_fetch_url;
529
530	if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
531	    && strcasecmp(host, "localhost") != 0) {
532		warnx("No support for non local file URL `%s'", url);
533		goto cleanup_fetch_url;
534	}
535
536	if (EMPTYSTRING(path)) {
537		if (urltype == FTP_URL_T) {
538			rval = fetch_ftp(url);
539			goto cleanup_fetch_url;
540		}
541		if (urltype != HTTP_URL_T || outfile == NULL)  {
542			warnx("Invalid URL (no file after host) `%s'", url);
543			goto cleanup_fetch_url;
544		}
545	}
546
547	decodedpath = ftp_strdup(path);
548	url_decode(decodedpath);
549
550	if (outfile)
551		savefile = ftp_strdup(outfile);
552	else {
553		cp = strrchr(decodedpath, '/');		/* find savefile */
554		if (cp != NULL)
555			savefile = ftp_strdup(cp + 1);
556		else
557			savefile = ftp_strdup(decodedpath);
558	}
559	if (EMPTYSTRING(savefile)) {
560		if (urltype == FTP_URL_T) {
561			rval = fetch_ftp(url);
562			goto cleanup_fetch_url;
563		}
564		warnx("No file after directory (you must specify an "
565		    "output file) `%s'", url);
566		goto cleanup_fetch_url;
567	} else {
568		DPRINTF("savefile `%s'\n", savefile);
569	}
570
571	restart_point = 0;
572	filesize = -1;
573	rangestart = rangeend = entitylen = -1;
574	mtime = -1;
575	if (restartautofetch) {
576		if (strcmp(savefile, "-") != 0 && *savefile != '|' &&
577		    stat(savefile, &sb) == 0)
578			restart_point = sb.st_size;
579	}
580	if (urltype == FILE_URL_T) {		/* file:// URLs */
581		direction = "copied";
582		fin = fopen(decodedpath, "r");
583		if (fin == NULL) {
584			warn("Can't open `%s'", decodedpath);
585			goto cleanup_fetch_url;
586		}
587		if (fstat(fileno(fin), &sb) == 0) {
588			mtime = sb.st_mtime;
589			filesize = sb.st_size;
590		}
591		if (restart_point) {
592			if (lseek(fileno(fin), restart_point, SEEK_SET) < 0) {
593				warn("Can't seek to restart `%s'",
594				    decodedpath);
595				goto cleanup_fetch_url;
596			}
597		}
598		if (verbose) {
599			fprintf(ttyout, "Copying %s", decodedpath);
600			if (restart_point)
601				fprintf(ttyout, " (restarting at " LLF ")",
602				    (LLT)restart_point);
603			fputs("\n", ttyout);
604		}
605	} else {				/* ftp:// or http:// URLs */
606		char *leading;
607		int hasleading;
608
609		if (proxyenv == NULL) {
610			if (urltype == HTTP_URL_T)
611				proxyenv = getoptionvalue("http_proxy");
612			else if (urltype == FTP_URL_T)
613				proxyenv = getoptionvalue("ftp_proxy");
614		}
615		direction = "retrieved";
616		if (! EMPTYSTRING(proxyenv)) {			/* use proxy */
617			url_t purltype;
618			char *phost, *ppath;
619			char *pport, *no_proxy;
620
621			isproxy = 1;
622
623				/* check URL against list of no_proxied sites */
624			no_proxy = getoptionvalue("no_proxy");
625			if (! EMPTYSTRING(no_proxy)) {
626				char *np, *np_copy, *np_iter;
627				long np_port;
628				size_t hlen, plen;
629
630				np_iter = np_copy = ftp_strdup(no_proxy);
631				hlen = strlen(host);
632				while ((cp = strsep(&np_iter, " ,")) != NULL) {
633					if (*cp == '\0')
634						continue;
635					if ((np = strrchr(cp, ':')) != NULL) {
636						*np = '\0';
637						np_port =
638						    strtol(np + 1, &ep, 10);
639						if (*ep != '\0')
640							continue;
641						if (np_port != portnum)
642							continue;
643					}
644					plen = strlen(cp);
645					if (hlen < plen)
646						continue;
647					if (strncasecmp(host + hlen - plen,
648					    cp, plen) == 0) {
649						isproxy = 0;
650						break;
651					}
652				}
653				FREEPTR(np_copy);
654				if (isproxy == 0 && urltype == FTP_URL_T) {
655					rval = fetch_ftp(url);
656					goto cleanup_fetch_url;
657				}
658			}
659
660			if (isproxy) {
661				if (restart_point) {
662					warnx("Can't restart via proxy URL `%s'",
663					    proxyenv);
664					goto cleanup_fetch_url;
665				}
666				if (parse_url(proxyenv, "proxy URL", &purltype,
667				    &puser, &ppass, &phost, &pport, &portnum,
668				    &ppath) == -1)
669					goto cleanup_fetch_url;
670
671				if ((purltype != HTTP_URL_T
672				     && purltype != FTP_URL_T) ||
673				    EMPTYSTRING(phost) ||
674				    (! EMPTYSTRING(ppath)
675				     && strcmp(ppath, "/") != 0)) {
676					warnx("Malformed proxy URL `%s'",
677					    proxyenv);
678					FREEPTR(phost);
679					FREEPTR(pport);
680					FREEPTR(ppath);
681					goto cleanup_fetch_url;
682				}
683				if (isipv6addr(host) &&
684				    strchr(host, '%') != NULL) {
685					warnx(
686"Scoped address notation `%s' disallowed via web proxy",
687					    host);
688					FREEPTR(phost);
689					FREEPTR(pport);
690					FREEPTR(ppath);
691					goto cleanup_fetch_url;
692				}
693
694				FREEPTR(host);
695				host = phost;
696				FREEPTR(port);
697				port = pport;
698				FREEPTR(path);
699				path = ftp_strdup(url);
700				FREEPTR(ppath);
701			}
702		} /* ! EMPTYSTRING(proxyenv) */
703
704		memset(&hints, 0, sizeof(hints));
705		hints.ai_flags = 0;
706		hints.ai_family = family;
707		hints.ai_socktype = SOCK_STREAM;
708		hints.ai_protocol = 0;
709		error = getaddrinfo(host, NULL, &hints, &res0);
710		if (error) {
711			warnx("Can't lookup `%s': %s", host,
712			    (error == EAI_SYSTEM) ? strerror(errno)
713						  : gai_strerror(error));
714			goto cleanup_fetch_url;
715		}
716		if (res0->ai_canonname)
717			host = res0->ai_canonname;
718
719		s = -1;
720		for (res = res0; res; res = res->ai_next) {
721			ai_unmapped(res);
722			if (getnameinfo(res->ai_addr, res->ai_addrlen,
723			    hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0)
724				strlcpy(hbuf, "?", sizeof(hbuf));
725
726			if (verbose && res0->ai_next) {
727				fprintf(ttyout, "Trying %s...\n", hbuf);
728			}
729
730			((struct sockaddr_in *)res->ai_addr)->sin_port =
731			    htons(portnum);
732			s = socket(res->ai_family, SOCK_STREAM,
733			    res->ai_protocol);
734			if (s < 0) {
735				warn(
736				  "Can't create socket for connection to `%s'",
737				    hbuf);
738				continue;
739			}
740
741			if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
742				close(s);
743				s = -1;
744				continue;
745			}
746
747			/* success */
748			break;
749		}
750
751		if (s < 0) {
752			warnx("Can't connect to `%s'", host);
753			goto cleanup_fetch_url;
754		}
755
756		fin = fdopen(s, "r+");
757		/*
758		 * Construct and send the request.
759		 */
760		if (verbose)
761			fprintf(ttyout, "Requesting %s\n", url);
762		leading = "  (";
763		hasleading = 0;
764		if (isproxy) {
765			if (verbose) {
766				fprintf(ttyout, "%svia %s:%s", leading,
767				    host, port);
768				leading = ", ";
769				hasleading++;
770			}
771			fprintf(fin, "GET %s HTTP/1.0\r\n", path);
772			if (flushcache)
773				fprintf(fin, "Pragma: no-cache\r\n");
774		} else {
775			fprintf(fin, "GET %s HTTP/1.1\r\n", path);
776			if (strchr(host, ':')) {
777				char *h, *p;
778
779				/*
780				 * strip off IPv6 scope identifier, since it is
781				 * local to the node
782				 */
783				h = ftp_strdup(host);
784				if (isipv6addr(h) &&
785				    (p = strchr(h, '%')) != NULL) {
786					*p = '\0';
787				}
788				fprintf(fin, "Host: [%s]", h);
789				free(h);
790			} else
791				fprintf(fin, "Host: %s", host);
792			if (portnum != HTTP_PORT)
793				fprintf(fin, ":%u", portnum);
794			fprintf(fin, "\r\n");
795			fprintf(fin, "Accept: */*\r\n");
796			fprintf(fin, "Connection: close\r\n");
797			if (restart_point) {
798				fputs(leading, ttyout);
799				fprintf(fin, "Range: bytes=" LLF "-\r\n",
800				    (LLT)restart_point);
801				fprintf(ttyout, "restarting at " LLF,
802				    (LLT)restart_point);
803				leading = ", ";
804				hasleading++;
805			}
806			if (flushcache)
807				fprintf(fin, "Cache-Control: no-cache\r\n");
808		}
809		if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
810			fprintf(fin, "User-Agent: %s\r\n", useragent);
811		} else {
812			fprintf(fin, "User-Agent: %s/%s\r\n",
813			    FTP_PRODUCT, FTP_VERSION);
814		}
815		if (wwwauth) {
816			if (verbose) {
817				fprintf(ttyout, "%swith authorization",
818				    leading);
819				leading = ", ";
820				hasleading++;
821			}
822			fprintf(fin, "Authorization: %s\r\n", wwwauth);
823		}
824		if (proxyauth) {
825			if (verbose) {
826				fprintf(ttyout,
827				    "%swith proxy authorization", leading);
828				leading = ", ";
829				hasleading++;
830			}
831			fprintf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
832		}
833		if (verbose && hasleading)
834			fputs(")\n", ttyout);
835		fprintf(fin, "\r\n");
836		if (fflush(fin) == EOF) {
837			warn("Writing HTTP request");
838			goto cleanup_fetch_url;
839		}
840
841				/* Read the response */
842		len = get_line(fin, buf, sizeof(buf), &errormsg);
843		if (len < 0) {
844			if (*errormsg == '\n')
845				errormsg++;
846			warnx("Receiving HTTP reply: %s", errormsg);
847			goto cleanup_fetch_url;
848		}
849		while (len > 0 && (ISLWS(buf[len-1])))
850			buf[--len] = '\0';
851		DPRINTF("received `%s'\n", buf);
852
853				/* Determine HTTP response code */
854		cp = strchr(buf, ' ');
855		if (cp == NULL)
856			goto improper;
857		else
858			cp++;
859		hcode = strtol(cp, &ep, 10);
860		if (*ep != '\0' && !isspace((unsigned char)*ep))
861			goto improper;
862		message = ftp_strdup(cp);
863
864				/* Read the rest of the header. */
865		while (1) {
866			len = get_line(fin, buf, sizeof(buf), &errormsg);
867			if (len < 0) {
868				if (*errormsg == '\n')
869					errormsg++;
870				warnx("Receiving HTTP reply: %s", errormsg);
871				goto cleanup_fetch_url;
872			}
873			while (len > 0 && (ISLWS(buf[len-1])))
874				buf[--len] = '\0';
875			if (len == 0)
876				break;
877			DPRINTF("received `%s'\n", buf);
878
879		/*
880		 * Look for some headers
881		 */
882
883			cp = buf;
884
885			if (match_token(&cp, "Content-Length:")) {
886				filesize = STRTOLL(cp, &ep, 10);
887				if (filesize < 0 || *ep != '\0')
888					goto improper;
889				DPRINTF("parsed len as: " LLF "\n",
890				    (LLT)filesize);
891
892			} else if (match_token(&cp, "Content-Range:")) {
893				if (! match_token(&cp, "bytes"))
894					goto improper;
895
896				if (*cp == '*')
897					cp++;
898				else {
899					rangestart = STRTOLL(cp, &ep, 10);
900					if (rangestart < 0 || *ep != '-')
901						goto improper;
902					cp = ep + 1;
903					rangeend = STRTOLL(cp, &ep, 10);
904					if (rangeend < 0 || rangeend < rangestart)
905						goto improper;
906					cp = ep;
907				}
908				if (*cp != '/')
909					goto improper;
910				cp++;
911				if (*cp == '*')
912					cp++;
913				else {
914					entitylen = STRTOLL(cp, &ep, 10);
915					if (entitylen < 0)
916						goto improper;
917					cp = ep;
918				}
919				if (*cp != '\0')
920					goto improper;
921
922#ifndef NO_DEBUG
923				if (ftp_debug) {
924					fprintf(ttyout, "parsed range as: ");
925					if (rangestart == -1)
926						fprintf(ttyout, "*");
927					else
928						fprintf(ttyout, LLF "-" LLF,
929						    (LLT)rangestart,
930						    (LLT)rangeend);
931					fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
932				}
933#endif
934				if (! restart_point) {
935					warnx(
936				    "Received unexpected Content-Range header");
937					goto cleanup_fetch_url;
938				}
939
940			} else if (match_token(&cp, "Last-Modified:")) {
941				struct tm parsed;
942				char *t;
943
944				memset(&parsed, 0, sizeof(parsed));
945							/* RFC1123 */
946				if ((t = strptime(cp,
947						"%a, %d %b %Y %H:%M:%S GMT",
948						&parsed))
949							/* RFC0850 */
950				    || (t = strptime(cp,
951						"%a, %d-%b-%y %H:%M:%S GMT",
952						&parsed))
953							/* asctime */
954				    || (t = strptime(cp,
955						"%a, %b %d %H:%M:%S %Y",
956						&parsed))) {
957					parsed.tm_isdst = -1;
958					if (*t == '\0')
959						mtime = timegm(&parsed);
960#ifndef NO_DEBUG
961					if (ftp_debug && mtime != -1) {
962						fprintf(ttyout,
963						    "parsed date as: %s",
964						rfc2822time(localtime(&mtime)));
965					}
966#endif
967				}
968
969			} else if (match_token(&cp, "Location:")) {
970				location = ftp_strdup(cp);
971				DPRINTF("parsed location as `%s'\n", cp);
972
973			} else if (match_token(&cp, "Transfer-Encoding:")) {
974				if (match_token(&cp, "binary")) {
975					warnx(
976			"Bogus transfer encoding `binary' (fetching anyway)");
977					continue;
978				}
979				if (! (token = match_token(&cp, "chunked"))) {
980					warnx(
981				    "Unsupported transfer encoding `%s'",
982					    token);
983					goto cleanup_fetch_url;
984				}
985				ischunked++;
986				DPRINTF("using chunked encoding\n");
987
988			} else if (match_token(&cp, "Proxy-Authenticate:")
989				|| match_token(&cp, "WWW-Authenticate:")) {
990				if (! (token = match_token(&cp, "Basic"))) {
991					DPRINTF(
992				"skipping unknown auth scheme `%s'\n",
993						    token);
994					continue;
995				}
996				FREEPTR(auth);
997				auth = ftp_strdup(token);
998				DPRINTF("parsed auth as `%s'\n", cp);
999			}
1000
1001		}
1002				/* finished parsing header */
1003
1004		switch (hcode) {
1005		case 200:
1006			break;
1007		case 206:
1008			if (! restart_point) {
1009				warnx("Not expecting partial content header");
1010				goto cleanup_fetch_url;
1011			}
1012			break;
1013		case 300:
1014		case 301:
1015		case 302:
1016		case 303:
1017		case 305:
1018		case 307:
1019			if (EMPTYSTRING(location)) {
1020				warnx(
1021				"No redirection Location provided by server");
1022				goto cleanup_fetch_url;
1023			}
1024			if (redirect_loop++ > 5) {
1025				warnx("Too many redirections requested");
1026				goto cleanup_fetch_url;
1027			}
1028			if (hcode == 305) {
1029				if (verbose)
1030					fprintf(ttyout, "Redirected via %s\n",
1031					    location);
1032				rval = fetch_url(url, location,
1033				    proxyauth, wwwauth);
1034			} else {
1035				if (verbose)
1036					fprintf(ttyout, "Redirected to %s\n",
1037					    location);
1038				rval = go_fetch(location);
1039			}
1040			goto cleanup_fetch_url;
1041#ifndef NO_AUTH
1042		case 401:
1043		case 407:
1044		    {
1045			char **authp;
1046			char *auser, *apass;
1047
1048			if (hcode == 401) {
1049				authp = &wwwauth;
1050				auser = user;
1051				apass = pass;
1052			} else {
1053				authp = &proxyauth;
1054				auser = puser;
1055				apass = ppass;
1056			}
1057			if (verbose || *authp == NULL ||
1058			    auser == NULL || apass == NULL)
1059				fprintf(ttyout, "%s\n", message);
1060			if (EMPTYSTRING(auth)) {
1061				warnx(
1062			    "No authentication challenge provided by server");
1063				goto cleanup_fetch_url;
1064			}
1065			if (*authp != NULL) {
1066				char reply[10];
1067
1068				fprintf(ttyout,
1069				    "Authorization failed. Retry (y/n)? ");
1070				if (get_line(stdin, reply, sizeof(reply), NULL)
1071				    < 0) {
1072					goto cleanup_fetch_url;
1073				}
1074				if (tolower((unsigned char)reply[0]) != 'y')
1075					goto cleanup_fetch_url;
1076				auser = NULL;
1077				apass = NULL;
1078			}
1079			if (auth_url(auth, authp, auser, apass) == 0) {
1080				rval = fetch_url(url, proxyenv,
1081				    proxyauth, wwwauth);
1082				memset(*authp, 0, strlen(*authp));
1083				FREEPTR(*authp);
1084			}
1085			goto cleanup_fetch_url;
1086		    }
1087#endif
1088		default:
1089			if (message)
1090				warnx("Error retrieving file `%s'", message);
1091			else
1092				warnx("Unknown error retrieving file");
1093			goto cleanup_fetch_url;
1094		}
1095	}		/* end of ftp:// or http:// specific setup */
1096
1097			/* Open the output file. */
1098	if (strcmp(savefile, "-") == 0) {
1099		fout = stdout;
1100	} else if (*savefile == '|') {
1101		oldintp = xsignal(SIGPIPE, SIG_IGN);
1102		fout = popen(savefile + 1, "w");
1103		if (fout == NULL) {
1104			warn("Can't execute `%s'", savefile + 1);
1105			goto cleanup_fetch_url;
1106		}
1107		closefunc = pclose;
1108	} else {
1109		if ((rangeend != -1 && rangeend <= restart_point) ||
1110		    (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1111			/* already done */
1112			if (verbose)
1113				fprintf(ttyout, "already done\n");
1114			rval = 0;
1115			goto cleanup_fetch_url;
1116		}
1117		if (restart_point && rangestart != -1) {
1118			if (entitylen != -1)
1119				filesize = entitylen;
1120			if (rangestart != restart_point) {
1121				warnx(
1122				    "Size of `%s' differs from save file `%s'",
1123				    url, savefile);
1124				goto cleanup_fetch_url;
1125			}
1126			fout = fopen(savefile, "a");
1127		} else
1128			fout = fopen(savefile, "w");
1129		if (fout == NULL) {
1130			warn("Can't open `%s'", savefile);
1131			goto cleanup_fetch_url;
1132		}
1133		closefunc = fclose;
1134	}
1135
1136			/* Trap signals */
1137	if (sigsetjmp(httpabort, 1))
1138		goto cleanup_fetch_url;
1139	(void)xsignal(SIGQUIT, psummary);
1140	oldintr = xsignal(SIGINT, aborthttp);
1141
1142	if (rcvbuf_size > bufsize) {
1143		if (xferbuf)
1144			(void)free(xferbuf);
1145		bufsize = rcvbuf_size;
1146		xferbuf = ftp_malloc(bufsize);
1147	}
1148
1149	bytes = 0;
1150	hashbytes = mark;
1151	progressmeter(-1);
1152
1153			/* Finally, suck down the file. */
1154	do {
1155		long chunksize;
1156
1157		chunksize = 0;
1158					/* read chunksize */
1159		if (ischunked) {
1160			if (fgets(xferbuf, bufsize, fin) == NULL) {
1161				warnx("Unexpected EOF reading chunksize");
1162				goto cleanup_fetch_url;
1163			}
1164			chunksize = strtol(xferbuf, &ep, 16);
1165
1166				/*
1167				 * XXX:	Work around bug in Apache 1.3.9 and
1168				 *	1.3.11, which incorrectly put trailing
1169				 *	space after the chunksize.
1170				 */
1171			while (*ep == ' ')
1172				ep++;
1173
1174			if (strcmp(ep, "\r\n") != 0) {
1175				warnx("Unexpected data following chunksize");
1176				goto cleanup_fetch_url;
1177			}
1178			DPRINTF("got chunksize of " LLF "\n", (LLT)chunksize);
1179			if (chunksize == 0)
1180				break;
1181		}
1182					/* transfer file or chunk */
1183		while (1) {
1184			struct timeval then, now, td;
1185			off_t bufrem;
1186
1187			if (rate_get)
1188				(void)gettimeofday(&then, NULL);
1189			bufrem = rate_get ? rate_get : bufsize;
1190			if (ischunked)
1191				bufrem = MIN(chunksize, bufrem);
1192			while (bufrem > 0) {
1193				len = fread(xferbuf, sizeof(char),
1194				    MIN(bufsize, bufrem), fin);
1195				if (len <= 0)
1196					goto chunkdone;
1197				bytes += len;
1198				bufrem -= len;
1199				if (fwrite(xferbuf, sizeof(char), len, fout)
1200				    != len) {
1201					warn("Writing `%s'", savefile);
1202					goto cleanup_fetch_url;
1203				}
1204				if (hash && !progress) {
1205					while (bytes >= hashbytes) {
1206						(void)putc('#', ttyout);
1207						hashbytes += mark;
1208					}
1209					(void)fflush(ttyout);
1210				}
1211				if (ischunked) {
1212					chunksize -= len;
1213					if (chunksize <= 0)
1214						break;
1215				}
1216			}
1217			if (rate_get) {
1218				while (1) {
1219					(void)gettimeofday(&now, NULL);
1220					timersub(&now, &then, &td);
1221					if (td.tv_sec > 0)
1222						break;
1223					usleep(1000000 - td.tv_usec);
1224				}
1225			}
1226			if (ischunked && chunksize <= 0)
1227				break;
1228		}
1229					/* read CRLF after chunk*/
1230 chunkdone:
1231		if (ischunked) {
1232			if (fgets(xferbuf, bufsize, fin) == NULL)
1233				break;
1234			if (strcmp(xferbuf, "\r\n") != 0) {
1235				warnx("Unexpected data following chunk");
1236				goto cleanup_fetch_url;
1237			}
1238		}
1239	} while (ischunked);
1240	if (hash && !progress && bytes > 0) {
1241		if (bytes < mark)
1242			(void)putc('#', ttyout);
1243		(void)putc('\n', ttyout);
1244	}
1245	if (ferror(fin)) {
1246		warn("Reading file");
1247		goto cleanup_fetch_url;
1248	}
1249	progressmeter(1);
1250	(void)fflush(fout);
1251	if (closefunc == fclose && mtime != -1) {
1252		struct timeval tval[2];
1253
1254		(void)gettimeofday(&tval[0], NULL);
1255		tval[1].tv_sec = mtime;
1256		tval[1].tv_usec = 0;
1257		(*closefunc)(fout);
1258		fout = NULL;
1259
1260		if (utimes(savefile, tval) == -1) {
1261			fprintf(ttyout,
1262			    "Can't change modification time to %s",
1263			    rfc2822time(localtime(&mtime)));
1264		}
1265	}
1266	if (bytes > 0)
1267		ptransfer(0);
1268	bytes = 0;
1269
1270	rval = 0;
1271	goto cleanup_fetch_url;
1272
1273 improper:
1274	warnx("Improper response from `%s'", host);
1275
1276 cleanup_fetch_url:
1277	if (oldintr)
1278		(void)xsignal(SIGINT, oldintr);
1279	if (oldintp)
1280		(void)xsignal(SIGPIPE, oldintp);
1281	if (fin != NULL)
1282		fclose(fin);
1283	else if (s != -1)
1284		close(s);
1285	if (closefunc != NULL && fout != NULL)
1286		(*closefunc)(fout);
1287	if (res0)
1288		freeaddrinfo(res0);
1289	FREEPTR(savefile);
1290	FREEPTR(user);
1291	if (pass != NULL)
1292		memset(pass, 0, strlen(pass));
1293	FREEPTR(pass);
1294	FREEPTR(host);
1295	FREEPTR(port);
1296	FREEPTR(path);
1297	FREEPTR(decodedpath);
1298	FREEPTR(puser);
1299	if (ppass != NULL)
1300		memset(ppass, 0, strlen(ppass));
1301	FREEPTR(ppass);
1302	FREEPTR(auth);
1303	FREEPTR(location);
1304	FREEPTR(message);
1305	return (rval);
1306}
1307
1308/*
1309 * Abort a HTTP retrieval
1310 */
1311void
1312aborthttp(int notused)
1313{
1314	char msgbuf[100];
1315	size_t len;
1316
1317	sigint_raised = 1;
1318	alarmtimer(0);
1319	len = strlcpy(msgbuf, "\nHTTP fetch aborted.\n", sizeof(msgbuf));
1320	write(fileno(ttyout), msgbuf, len);
1321	siglongjmp(httpabort, 1);
1322}
1323
1324/*
1325 * Retrieve ftp URL or classic ftp argument using FTP.
1326 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1327 * is still open (e.g, ftp xfer with trailing /)
1328 */
1329static int
1330fetch_ftp(const char *url)
1331{
1332	char		*cp, *xargv[5], rempath[MAXPATHLEN];
1333	char		*host, *path, *dir, *file, *user, *pass;
1334	char		*port;
1335	int		 dirhasglob, filehasglob, rval, type, xargc;
1336	int		 oanonftp, oautologin;
1337	in_port_t	 portnum;
1338	url_t		 urltype;
1339
1340	host = path = dir = file = user = pass = NULL;
1341	port = NULL;
1342	rval = 1;
1343	type = TYPE_I;
1344
1345	if (STRNEQUAL(url, FTP_URL)) {
1346		if ((parse_url(url, "URL", &urltype, &user, &pass,
1347		    &host, &port, &portnum, &path) == -1) ||
1348		    (user != NULL && *user == '\0') ||
1349		    EMPTYSTRING(host)) {
1350			warnx("Invalid URL `%s'", url);
1351			goto cleanup_fetch_ftp;
1352		}
1353		/*
1354		 * Note: Don't url_decode(path) here.  We need to keep the
1355		 * distinction between "/" and "%2F" until later.
1356		 */
1357
1358					/* check for trailing ';type=[aid]' */
1359		if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1360			if (strcasecmp(cp, ";type=a") == 0)
1361				type = TYPE_A;
1362			else if (strcasecmp(cp, ";type=i") == 0)
1363				type = TYPE_I;
1364			else if (strcasecmp(cp, ";type=d") == 0) {
1365				warnx(
1366			    "Directory listing via a URL is not supported");
1367				goto cleanup_fetch_ftp;
1368			} else {
1369				warnx("Invalid suffix `%s' in URL `%s'", cp,
1370				    url);
1371				goto cleanup_fetch_ftp;
1372			}
1373			*cp = 0;
1374		}
1375	} else {			/* classic style `[user@]host:[file]' */
1376		urltype = CLASSIC_URL_T;
1377		host = ftp_strdup(url);
1378		cp = strchr(host, '@');
1379		if (cp != NULL) {
1380			*cp = '\0';
1381			user = host;
1382			anonftp = 0;	/* disable anonftp */
1383			host = ftp_strdup(cp + 1);
1384		}
1385		cp = strchr(host, ':');
1386		if (cp != NULL) {
1387			*cp = '\0';
1388			path = ftp_strdup(cp + 1);
1389		}
1390	}
1391	if (EMPTYSTRING(host))
1392		goto cleanup_fetch_ftp;
1393
1394			/* Extract the file and (if present) directory name. */
1395	dir = path;
1396	if (! EMPTYSTRING(dir)) {
1397		/*
1398		 * If we are dealing with classic `[user@]host:[path]' syntax,
1399		 * then a path of the form `/file' (resulting from input of the
1400		 * form `host:/file') means that we should do "CWD /" before
1401		 * retrieving the file.  So we set dir="/" and file="file".
1402		 *
1403		 * But if we are dealing with URLs like `ftp://host/path' then
1404		 * a path of the form `/file' (resulting from a URL of the form
1405		 * `ftp://host//file') means that we should do `CWD ' (with an
1406		 * empty argument) before retrieving the file.  So we set
1407		 * dir="" and file="file".
1408		 *
1409		 * If the path does not contain / at all, we set dir=NULL.
1410		 * (We get a path without any slashes if we are dealing with
1411		 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1412		 *
1413		 * In all other cases, we set dir to a string that does not
1414		 * include the final '/' that separates the dir part from the
1415		 * file part of the path.  (This will be the empty string if
1416		 * and only if we are dealing with a path of the form `/file'
1417		 * resulting from an URL of the form `ftp://host//file'.)
1418		 */
1419		cp = strrchr(dir, '/');
1420		if (cp == dir && urltype == CLASSIC_URL_T) {
1421			file = cp + 1;
1422			dir = "/";
1423		} else if (cp != NULL) {
1424			*cp++ = '\0';
1425			file = cp;
1426		} else {
1427			file = dir;
1428			dir = NULL;
1429		}
1430	} else
1431		dir = NULL;
1432	if (urltype == FTP_URL_T && file != NULL) {
1433		url_decode(file);
1434		/* but still don't url_decode(dir) */
1435	}
1436	DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1437	    "path `%s' dir `%s' file `%s'\n",
1438	    user ? user : "<null>", pass ? pass : "<null>",
1439	    host ? host : "<null>", port ? port : "<null>",
1440	    path ? path : "<null>",
1441	    dir ? dir : "<null>", file ? file : "<null>");
1442
1443	dirhasglob = filehasglob = 0;
1444	if (doglob && urltype == CLASSIC_URL_T) {
1445		if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1446			dirhasglob = 1;
1447		if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1448			filehasglob = 1;
1449	}
1450
1451			/* Set up the connection */
1452	oanonftp = anonftp;
1453	if (connected)
1454		disconnect(0, NULL);
1455	anonftp = oanonftp;
1456	xargv[0] = (char *)getprogname();	/* XXX discards const */
1457	xargv[1] = host;
1458	xargv[2] = NULL;
1459	xargc = 2;
1460	if (port) {
1461		xargv[2] = port;
1462		xargv[3] = NULL;
1463		xargc = 3;
1464	}
1465	oautologin = autologin;
1466		/* don't autologin in setpeer(), use ftp_login() below */
1467	autologin = 0;
1468	setpeer(xargc, xargv);
1469	autologin = oautologin;
1470	if ((connected == 0) ||
1471	    (connected == 1 && !ftp_login(host, user, pass))) {
1472		warnx("Can't connect or login to host `%s'", host);
1473		goto cleanup_fetch_ftp;
1474	}
1475
1476	switch (type) {
1477	case TYPE_A:
1478		setascii(1, xargv);
1479		break;
1480	case TYPE_I:
1481		setbinary(1, xargv);
1482		break;
1483	default:
1484		errx(1, "fetch_ftp: unknown transfer type %d", type);
1485	}
1486
1487		/*
1488		 * Change directories, if necessary.
1489		 *
1490		 * Note: don't use EMPTYSTRING(dir) below, because
1491		 * dir=="" means something different from dir==NULL.
1492		 */
1493	if (dir != NULL && !dirhasglob) {
1494		char *nextpart;
1495
1496		/*
1497		 * If we are dealing with a classic `[user@]host:[path]'
1498		 * (urltype is CLASSIC_URL_T) then we have a raw directory
1499		 * name (not encoded in any way) and we can change
1500		 * directories in one step.
1501		 *
1502		 * If we are dealing with an `ftp://host/path' URL
1503		 * (urltype is FTP_URL_T), then RFC3986 says we need to
1504		 * send a separate CWD command for each unescaped "/"
1505		 * in the path, and we have to interpret %hex escaping
1506		 * *after* we find the slashes.  It's possible to get
1507		 * empty components here, (from multiple adjacent
1508		 * slashes in the path) and RFC3986 says that we should
1509		 * still do `CWD ' (with a null argument) in such cases.
1510		 *
1511		 * Many ftp servers don't support `CWD ', so if there's an
1512		 * error performing that command, bail out with a descriptive
1513		 * message.
1514		 *
1515		 * Examples:
1516		 *
1517		 * host:			dir="", urltype=CLASSIC_URL_T
1518		 *		logged in (to default directory)
1519		 * host:file			dir=NULL, urltype=CLASSIC_URL_T
1520		 *		"RETR file"
1521		 * host:dir/			dir="dir", urltype=CLASSIC_URL_T
1522		 *		"CWD dir", logged in
1523		 * ftp://host/			dir="", urltype=FTP_URL_T
1524		 *		logged in (to default directory)
1525		 * ftp://host/dir/		dir="dir", urltype=FTP_URL_T
1526		 *		"CWD dir", logged in
1527		 * ftp://host/file		dir=NULL, urltype=FTP_URL_T
1528		 *		"RETR file"
1529		 * ftp://host//file		dir="", urltype=FTP_URL_T
1530		 *		"CWD ", "RETR file"
1531		 * host:/file			dir="/", urltype=CLASSIC_URL_T
1532		 *		"CWD /", "RETR file"
1533		 * ftp://host///file		dir="/", urltype=FTP_URL_T
1534		 *		"CWD ", "CWD ", "RETR file"
1535		 * ftp://host/%2F/file		dir="%2F", urltype=FTP_URL_T
1536		 *		"CWD /", "RETR file"
1537		 * ftp://host/foo/file		dir="foo", urltype=FTP_URL_T
1538		 *		"CWD foo", "RETR file"
1539		 * ftp://host/foo/bar/file	dir="foo/bar"
1540		 *		"CWD foo", "CWD bar", "RETR file"
1541		 * ftp://host//foo/bar/file	dir="/foo/bar"
1542		 *		"CWD ", "CWD foo", "CWD bar", "RETR file"
1543		 * ftp://host/foo//bar/file	dir="foo//bar"
1544		 *		"CWD foo", "CWD ", "CWD bar", "RETR file"
1545		 * ftp://host/%2F/foo/bar/file	dir="%2F/foo/bar"
1546		 *		"CWD /", "CWD foo", "CWD bar", "RETR file"
1547		 * ftp://host/%2Ffoo/bar/file	dir="%2Ffoo/bar"
1548		 *		"CWD /foo", "CWD bar", "RETR file"
1549		 * ftp://host/%2Ffoo%2Fbar/file	dir="%2Ffoo%2Fbar"
1550		 *		"CWD /foo/bar", "RETR file"
1551		 * ftp://host/%2Ffoo%2Fbar%2Ffile	dir=NULL
1552		 *		"RETR /foo/bar/file"
1553		 *
1554		 * Note that we don't need `dir' after this point.
1555		 */
1556		do {
1557			if (urltype == FTP_URL_T) {
1558				nextpart = strchr(dir, '/');
1559				if (nextpart) {
1560					*nextpart = '\0';
1561					nextpart++;
1562				}
1563				url_decode(dir);
1564			} else
1565				nextpart = NULL;
1566			DPRINTF("dir `%s', nextpart `%s'\n",
1567			    dir ? dir : "<null>",
1568			    nextpart ? nextpart : "<null>");
1569			if (urltype == FTP_URL_T || *dir != '\0') {
1570				xargv[0] = "cd";
1571				xargv[1] = dir;
1572				xargv[2] = NULL;
1573				dirchange = 0;
1574				cd(2, xargv);
1575				if (! dirchange) {
1576					if (*dir == '\0' && code == 500)
1577						fprintf(stderr,
1578"\n"
1579"ftp: The `CWD ' command (without a directory), which is required by\n"
1580"     RFC3986 to support the empty directory in the URL pathname (`//'),\n"
1581"     conflicts with the server's conformance to RFC0959.\n"
1582"     Try the same URL without the `//' in the URL pathname.\n"
1583"\n");
1584					goto cleanup_fetch_ftp;
1585				}
1586			}
1587			dir = nextpart;
1588		} while (dir != NULL);
1589	}
1590
1591	if (EMPTYSTRING(file)) {
1592		rval = -1;
1593		goto cleanup_fetch_ftp;
1594	}
1595
1596	if (dirhasglob) {
1597		(void)strlcpy(rempath, dir,	sizeof(rempath));
1598		(void)strlcat(rempath, "/",	sizeof(rempath));
1599		(void)strlcat(rempath, file,	sizeof(rempath));
1600		file = rempath;
1601	}
1602
1603			/* Fetch the file(s). */
1604	xargc = 2;
1605	xargv[0] = "get";
1606	xargv[1] = file;
1607	xargv[2] = NULL;
1608	if (dirhasglob || filehasglob) {
1609		int ointeractive;
1610
1611		ointeractive = interactive;
1612		interactive = 0;
1613		if (restartautofetch)
1614			xargv[0] = "mreget";
1615		else
1616			xargv[0] = "mget";
1617		mget(xargc, xargv);
1618		interactive = ointeractive;
1619	} else {
1620		if (outfile == NULL) {
1621			cp = strrchr(file, '/');	/* find savefile */
1622			if (cp != NULL)
1623				outfile = cp + 1;
1624			else
1625				outfile = file;
1626		}
1627		xargv[2] = (char *)outfile;
1628		xargv[3] = NULL;
1629		xargc++;
1630		if (restartautofetch)
1631			reget(xargc, xargv);
1632		else
1633			get(xargc, xargv);
1634	}
1635
1636	if ((code / 100) == COMPLETE)
1637		rval = 0;
1638
1639 cleanup_fetch_ftp:
1640	FREEPTR(port);
1641	FREEPTR(host);
1642	FREEPTR(path);
1643	FREEPTR(user);
1644	if (pass)
1645		memset(pass, 0, strlen(pass));
1646	FREEPTR(pass);
1647	return (rval);
1648}
1649
1650/*
1651 * Retrieve the given file to outfile.
1652 * Supports arguments of the form:
1653 *	"host:path", "ftp://host/path"	if $ftpproxy, call fetch_url() else
1654 *					call fetch_ftp()
1655 *	"http://host/path"		call fetch_url() to use HTTP
1656 *	"file:///path"			call fetch_url() to copy
1657 *	"about:..."			print a message
1658 *
1659 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1660 * is still open (e.g, ftp xfer with trailing /)
1661 */
1662static int
1663go_fetch(const char *url)
1664{
1665	char *proxy;
1666
1667#ifndef NO_ABOUT
1668	/*
1669	 * Check for about:*
1670	 */
1671	if (STRNEQUAL(url, ABOUT_URL)) {
1672		url += sizeof(ABOUT_URL) -1;
1673		if (strcasecmp(url, "ftp") == 0 ||
1674		    strcasecmp(url, "tnftp") == 0) {
1675			fputs(
1676"This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1677"for the NetBSD project.  Execute `man ftp' for more details.\n", ttyout);
1678		} else if (strcasecmp(url, "lukem") == 0) {
1679			fputs(
1680"Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1681"Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1682		} else if (strcasecmp(url, "netbsd") == 0) {
1683			fputs(
1684"NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1685"For more information, see http://www.NetBSD.org/\n", ttyout);
1686		} else if (strcasecmp(url, "version") == 0) {
1687			fprintf(ttyout, "Version: %s %s%s\n",
1688			    FTP_PRODUCT, FTP_VERSION,
1689#ifdef INET6
1690			    ""
1691#else
1692			    " (-IPv6)"
1693#endif
1694			);
1695		} else {
1696			fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1697		}
1698		fputs("\n", ttyout);
1699		return (0);
1700	}
1701#endif
1702
1703	/*
1704	 * Check for file:// and http:// URLs.
1705	 */
1706	if (STRNEQUAL(url, HTTP_URL) || STRNEQUAL(url, FILE_URL))
1707		return (fetch_url(url, NULL, NULL, NULL));
1708
1709	/*
1710	 * Try FTP URL-style and host:file arguments next.
1711	 * If ftpproxy is set with an FTP URL, use fetch_url()
1712	 * Othewise, use fetch_ftp().
1713	 */
1714	proxy = getoptionvalue("ftp_proxy");
1715	if (!EMPTYSTRING(proxy) && STRNEQUAL(url, FTP_URL))
1716		return (fetch_url(url, NULL, NULL, NULL));
1717
1718	return (fetch_ftp(url));
1719}
1720
1721/*
1722 * Retrieve multiple files from the command line,
1723 * calling go_fetch() for each file.
1724 *
1725 * If an ftp path has a trailing "/", the path will be cd-ed into and
1726 * the connection remains open, and the function will return -1
1727 * (to indicate the connection is alive).
1728 * If an error occurs the return value will be the offset+1 in
1729 * argv[] of the file that caused a problem (i.e, argv[x]
1730 * returns x+1)
1731 * Otherwise, 0 is returned if all files retrieved successfully.
1732 */
1733int
1734auto_fetch(int argc, char *argv[])
1735{
1736	volatile int	argpos, rval;
1737
1738	argpos = rval = 0;
1739
1740	if (sigsetjmp(toplevel, 1)) {
1741		if (connected)
1742			disconnect(0, NULL);
1743		if (rval > 0)
1744			rval = argpos + 1;
1745		return (rval);
1746	}
1747	(void)xsignal(SIGINT, intr);
1748	(void)xsignal(SIGPIPE, lostpeer);
1749
1750	/*
1751	 * Loop through as long as there's files to fetch.
1752	 */
1753	for (; (rval == 0) && (argpos < argc); argpos++) {
1754		if (strchr(argv[argpos], ':') == NULL)
1755			break;
1756		redirect_loop = 0;
1757		if (!anonftp)
1758			anonftp = 2;	/* Handle "automatic" transfers. */
1759		rval = go_fetch(argv[argpos]);
1760		if (outfile != NULL && strcmp(outfile, "-") != 0
1761		    && outfile[0] != '|')
1762			outfile = NULL;
1763		if (rval > 0)
1764			rval = argpos + 1;
1765	}
1766
1767	if (connected && rval != -1)
1768		disconnect(0, NULL);
1769	return (rval);
1770}
1771
1772
1773/*
1774 * Upload multiple files from the command line.
1775 *
1776 * If an error occurs the return value will be the offset+1 in
1777 * argv[] of the file that caused a problem (i.e, argv[x]
1778 * returns x+1)
1779 * Otherwise, 0 is returned if all files uploaded successfully.
1780 */
1781int
1782auto_put(int argc, char **argv, const char *uploadserver)
1783{
1784	char	*uargv[4], *path, *pathsep;
1785	int	 uargc, rval, argpos;
1786	size_t	 len;
1787
1788	uargc = 0;
1789	uargv[uargc++] = "mput";
1790	uargv[uargc++] = argv[0];
1791	uargv[2] = uargv[3] = NULL;
1792	pathsep = NULL;
1793	rval = 1;
1794
1795	DPRINTF("auto_put: target `%s'\n", uploadserver);
1796
1797	path = ftp_strdup(uploadserver);
1798	len = strlen(path);
1799	if (path[len - 1] != '/' && path[len - 1] != ':') {
1800			/*
1801			 * make sure we always pass a directory to auto_fetch
1802			 */
1803		if (argc > 1) {		/* more than one file to upload */
1804			len = strlen(uploadserver) + 2;	/* path + "/" + "\0" */
1805			free(path);
1806			path = (char *)ftp_malloc(len);
1807			(void)strlcpy(path, uploadserver, len);
1808			(void)strlcat(path, "/", len);
1809		} else {		/* single file to upload */
1810			uargv[0] = "put";
1811			pathsep = strrchr(path, '/');
1812			if (pathsep == NULL) {
1813				pathsep = strrchr(path, ':');
1814				if (pathsep == NULL) {
1815					warnx("Invalid URL `%s'", path);
1816					goto cleanup_auto_put;
1817				}
1818				pathsep++;
1819				uargv[2] = ftp_strdup(pathsep);
1820				pathsep[0] = '/';
1821			} else
1822				uargv[2] = ftp_strdup(pathsep + 1);
1823			pathsep[1] = '\0';
1824			uargc++;
1825		}
1826	}
1827	DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1828	    path, uargv[2] ? uargv[2] : "<null>");
1829
1830			/* connect and cwd */
1831	rval = auto_fetch(1, &path);
1832	if(rval >= 0)
1833		goto cleanup_auto_put;
1834
1835	rval = 0;
1836
1837			/* target filename provided; upload 1 file */
1838			/* XXX : is this the best way? */
1839	if (uargc == 3) {
1840		uargv[1] = argv[0];
1841		put(uargc, uargv);
1842		if ((code / 100) != COMPLETE)
1843			rval = 1;
1844	} else {	/* otherwise a target dir: upload all files to it */
1845		for(argpos = 0; argv[argpos] != NULL; argpos++) {
1846			uargv[1] = argv[argpos];
1847			mput(uargc, uargv);
1848			if ((code / 100) != COMPLETE) {
1849				rval = argpos + 1;
1850				break;
1851			}
1852		}
1853	}
1854
1855 cleanup_auto_put:
1856	free(path);
1857	FREEPTR(uargv[2]);
1858	return (rval);
1859}
1860