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kernel/mrsas: Fix a double assignment.
[dragonfly.git] / contrib / tnftp / src / fetch.c
blobb14b1f5adb1f5ec6c8a8ed1c24e6d34b6e4969c7
1 /* $NetBSD: fetch.c,v 1.21 2015/10/04 04:53:26 lukem Exp $ */
2 /* from NetBSD: fetch.c,v 1.207 2015/09/12 19:38:42 wiz Exp */
3
4 /*-
5 * Copyright (c) 1997-2015 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 * This code is derived from software contributed to The NetBSD Foundation
15 * by Thomas Klausner.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
19 * are met:
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in the
24 * documentation and/or other materials provided with the distribution.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 #include "tnftp.h"
40
41 #if 0 /* tnftp */
42
43 #include <sys/cdefs.h>
44 #ifndef lint
45 __RCSID(" NetBSD: fetch.c,v 1.207 2015/09/12 19:38:42 wiz Exp ");
46 #endif /* not lint */
47
48 /*
49 * FTP User Program -- Command line file retrieval
50 */
51
52 #include <sys/types.h>
53 #include <sys/param.h>
54 #include <sys/socket.h>
55 #include <sys/stat.h>
56 #include <sys/time.h>
57
58 #include <netinet/in.h>
59
60 #include <arpa/ftp.h>
61 #include <arpa/inet.h>
62
63 #include <assert.h>
64 #include <ctype.h>
65 #include <err.h>
66 #include <errno.h>
67 #include <netdb.h>
68 #include <fcntl.h>
69 #include <stdio.h>
70 #include <stdlib.h>
71 #include <string.h>
72 #include <unistd.h>
73 #include <time.h>
74
75 #endif /* tnftp */
76
77 #include "ssl.h"
78 #include "ftp_var.h"
79 #include "version.h"
80
81 typedef enum {
82 UNKNOWN_URL_T=-1,
83 HTTP_URL_T,
84 #ifdef WITH_SSL
85 HTTPS_URL_T,
86 #endif
87 FTP_URL_T,
88 FILE_URL_T,
89 CLASSIC_URL_T
90 } url_t;
91
92 __dead static void aborthttp(int);
93 __dead static void timeouthttp(int);
94 #ifndef NO_AUTH
95 static int auth_url(const char *, char **, const char *, const char *);
96 static void base64_encode(const unsigned char *, size_t, unsigned char *);
97 #endif
98 static int go_fetch(const char *);
99 static int fetch_ftp(const char *);
100 static int fetch_url(const char *, const char *, char *, char *);
101 static const char *match_token(const char **, const char *);
102 static int parse_url(const char *, const char *, url_t *, char **,
103 char **, char **, char **, in_port_t *, char **);
104 static void url_decode(char *);
105
106 static int redirect_loop;
107
108
109 #define STRNEQUAL(a,b) (strncasecmp((a), (b), sizeof((b))-1) == 0)
110 #define ISLWS(x) ((x)=='\r' || (x)=='\n' || (x)==' ' || (x)=='\t')
111 #define SKIPLWS(x) do { while (ISLWS((*x))) x++; } while (0)
112
113
114 #define ABOUT_URL "about:" /* propaganda */
115 #define FILE_URL "file://" /* file URL prefix */
116 #define FTP_URL "ftp://" /* ftp URL prefix */
117 #define HTTP_URL "http://" /* http URL prefix */
118 #ifdef WITH_SSL
119 #define HTTPS_URL "https://" /* https URL prefix */
120
121 #define IS_HTTP_TYPE(urltype) \
122 (((urltype) == HTTP_URL_T) || ((urltype) == HTTPS_URL_T))
123 #else
124 #define IS_HTTP_TYPE(urltype) \
125 ((urltype) == HTTP_URL_T)
126 #endif
127
128 /*
129 * Determine if token is the next word in buf (case insensitive).
130 * If so, advance buf past the token and any trailing LWS, and
131 * return a pointer to the token (in buf). Otherwise, return NULL.
132 * token may be preceded by LWS.
133 * token must be followed by LWS or NUL. (I.e, don't partial match).
134 */
135 static const char *
136 match_token(const char **buf, const char *token)
137 {
138 const char *p, *orig;
139 size_t tlen;
140
141 tlen = strlen(token);
142 p = *buf;
143 SKIPLWS(p);
144 orig = p;
145 if (strncasecmp(p, token, tlen) != 0)
146 return NULL;
147 p += tlen;
148 if (*p != '\0' && !ISLWS(*p))
149 return NULL;
150 SKIPLWS(p);
151 orig = *buf;
152 *buf = p;
153 return orig;
154 }
155
156 #ifndef NO_AUTH
157 /*
158 * Generate authorization response based on given authentication challenge.
159 * Returns -1 if an error occurred, otherwise 0.
160 * Sets response to a malloc(3)ed string; caller should free.
161 */
162 static int
163 auth_url(const char *challenge, char **response, const char *guser,
164 const char *gpass)
165 {
166 const char *cp, *scheme, *errormsg;
167 char *ep, *clear, *realm;
168 char uuser[BUFSIZ], *gotpass;
169 const char *upass;
170 int rval;
171 size_t len, clen, rlen;
172
173 *response = NULL;
174 clear = realm = NULL;
175 rval = -1;
176 cp = challenge;
177 scheme = "Basic"; /* only support Basic authentication */
178 gotpass = NULL;
179
180 DPRINTF("auth_url: challenge `%s'\n", challenge);
181
182 if (! match_token(&cp, scheme)) {
183 warnx("Unsupported authentication challenge `%s'",
184 challenge);
185 goto cleanup_auth_url;
186 }
187
188 #define REALM "realm=\""
189 if (STRNEQUAL(cp, REALM))
190 cp += sizeof(REALM) - 1;
191 else {
192 warnx("Unsupported authentication challenge `%s'",
193 challenge);
194 goto cleanup_auth_url;
195 }
196 /* XXX: need to improve quoted-string parsing to support \ quoting, etc. */
197 if ((ep = strchr(cp, '\"')) != NULL) {
198 len = ep - cp;
199 realm = (char *)ftp_malloc(len + 1);
200 (void)strlcpy(realm, cp, len + 1);
201 } else {
202 warnx("Unsupported authentication challenge `%s'",
203 challenge);
204 goto cleanup_auth_url;
205 }
206
207 fprintf(ttyout, "Username for `%s': ", realm);
208 if (guser != NULL) {
209 (void)strlcpy(uuser, guser, sizeof(uuser));
210 fprintf(ttyout, "%s\n", uuser);
211 } else {
212 (void)fflush(ttyout);
213 if (get_line(stdin, uuser, sizeof(uuser), &errormsg) < 0) {
214 warnx("%s; can't authenticate", errormsg);
215 goto cleanup_auth_url;
216 }
217 }
218 if (gpass != NULL)
219 upass = gpass;
220 else {
221 gotpass = getpass("Password: ");
222 if (gotpass == NULL) {
223 warnx("Can't read password");
224 goto cleanup_auth_url;
225 }
226 upass = gotpass;
227 }
228
229 clen = strlen(uuser) + strlen(upass) + 2; /* user + ":" + pass + "\0" */
230 clear = (char *)ftp_malloc(clen);
231 (void)strlcpy(clear, uuser, clen);
232 (void)strlcat(clear, ":", clen);
233 (void)strlcat(clear, upass, clen);
234 if (gotpass)
235 memset(gotpass, 0, strlen(gotpass));
236
237 /* scheme + " " + enc + "\0" */
238 rlen = strlen(scheme) + 1 + (clen + 2) * 4 / 3 + 1;
239 *response = (char *)ftp_malloc(rlen);
240 (void)strlcpy(*response, scheme, rlen);
241 len = strlcat(*response, " ", rlen);
242 /* use `clen - 1' to not encode the trailing NUL */
243 base64_encode((unsigned char *)clear, clen - 1,
244 (unsigned char *)*response + len);
245 memset(clear, 0, clen);
246 rval = 0;
247
248 cleanup_auth_url:
249 FREEPTR(clear);
250 FREEPTR(realm);
251 return (rval);
252 }
253
254 /*
255 * Encode len bytes starting at clear using base64 encoding into encoded,
256 * which should be at least ((len + 2) * 4 / 3 + 1) in size.
257 */
258 static void
259 base64_encode(const unsigned char *clear, size_t len, unsigned char *encoded)
260 {
261 static const unsigned char enc[] =
262 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
263 unsigned char *cp;
264 size_t i;
265
266 cp = encoded;
267 for (i = 0; i < len; i += 3) {
268 *(cp++) = enc[((clear[i + 0] >> 2))];
269 *(cp++) = enc[((clear[i + 0] << 4) & 0x30)
270 | ((clear[i + 1] >> 4) & 0x0f)];
271 *(cp++) = enc[((clear[i + 1] << 2) & 0x3c)
272 | ((clear[i + 2] >> 6) & 0x03)];
273 *(cp++) = enc[((clear[i + 2] ) & 0x3f)];
274 }
275 *cp = '\0';
276 while (i-- > len)
277 *(--cp) = '=';
278 }
279 #endif
280
281 /*
282 * Decode %xx escapes in given string, `in-place'.
283 */
284 static void
285 url_decode(char *url)
286 {
287 unsigned char *p, *q;
288
289 if (EMPTYSTRING(url))
290 return;
291 p = q = (unsigned char *)url;
292
293 #define HEXTOINT(x) (x - (isdigit(x) ? '0' : (islower(x) ? 'a' : 'A') - 10))
294 while (*p) {
295 if (p[0] == '%'
296 && p[1] && isxdigit((unsigned char)p[1])
297 && p[2] && isxdigit((unsigned char)p[2])) {
298 *q++ = HEXTOINT(p[1]) * 16 + HEXTOINT(p[2]);
299 p+=3;
300 } else
301 *q++ = *p++;
302 }
303 *q = '\0';
304 }
305
306
307 /*
308 * Parse URL of form (per RFC 3986):
309 * <type>://[<user>[:<password>]@]<host>[:<port>][/<path>]
310 * Returns -1 if a parse error occurred, otherwise 0.
311 * It's the caller's responsibility to url_decode() the returned
312 * user, pass and path.
313 *
314 * Sets type to url_t, each of the given char ** pointers to a
315 * malloc(3)ed strings of the relevant section, and port to
316 * the number given, or ftpport if ftp://, or httpport if http://.
317 *
318 * XXX: this is not totally RFC 3986 compliant; <path> will have the
319 * leading `/' unless it's an ftp:// URL, as this makes things easier
320 * for file:// and http:// URLs. ftp:// URLs have the `/' between the
321 * host and the URL-path removed, but any additional leading slashes
322 * in the URL-path are retained (because they imply that we should
323 * later do "CWD" with a null argument).
324 *
325 * Examples:
326 * input URL output path
327 * --------- -----------
328 * "http://host" "/"
329 * "http://host/" "/"
330 * "http://host/path" "/path"
331 * "file://host/dir/file" "dir/file"
332 * "ftp://host" ""
333 * "ftp://host/" ""
334 * "ftp://host//" "/"
335 * "ftp://host/dir/file" "dir/file"
336 * "ftp://host//dir/file" "/dir/file"
337 */
338 static int
339 parse_url(const char *url, const char *desc, url_t *utype,
340 char **uuser, char **pass, char **host, char **port,
341 in_port_t *portnum, char **path)
342 {
343 const char *origurl, *tport;
344 char *cp, *ep, *thost;
345 size_t len;
346
347 if (url == NULL || desc == NULL || utype == NULL || uuser == NULL
348 || pass == NULL || host == NULL || port == NULL || portnum == NULL
349 || path == NULL)
350 errx(1, "parse_url: invoked with NULL argument!");
351 DPRINTF("parse_url: %s `%s'\n", desc, url);
352
353 origurl = url;
354 *utype = UNKNOWN_URL_T;
355 *uuser = *pass = *host = *port = *path = NULL;
356 *portnum = 0;
357 tport = NULL;
358
359 if (STRNEQUAL(url, HTTP_URL)) {
360 url += sizeof(HTTP_URL) - 1;
361 *utype = HTTP_URL_T;
362 *portnum = HTTP_PORT;
363 tport = httpport;
364 } else if (STRNEQUAL(url, FTP_URL)) {
365 url += sizeof(FTP_URL) - 1;
366 *utype = FTP_URL_T;
367 *portnum = FTP_PORT;
368 tport = ftpport;
369 } else if (STRNEQUAL(url, FILE_URL)) {
370 url += sizeof(FILE_URL) - 1;
371 *utype = FILE_URL_T;
372 #ifdef WITH_SSL
373 } else if (STRNEQUAL(url, HTTPS_URL)) {
374 url += sizeof(HTTPS_URL) - 1;
375 *utype = HTTPS_URL_T;
376 *portnum = HTTPS_PORT;
377 tport = httpsport;
378 #endif
379 } else {
380 warnx("Invalid %s `%s'", desc, url);
381 cleanup_parse_url:
382 FREEPTR(*uuser);
383 if (*pass != NULL)
384 memset(*pass, 0, strlen(*pass));
385 FREEPTR(*pass);
386 FREEPTR(*host);
387 FREEPTR(*port);
388 FREEPTR(*path);
389 return (-1);
390 }
391
392 if (*url == '\0')
393 return (0);
394
395 /* find [user[:pass]@]host[:port] */
396 ep = strchr(url, '/');
397 if (ep == NULL)
398 thost = ftp_strdup(url);
399 else {
400 len = ep - url;
401 thost = (char *)ftp_malloc(len + 1);
402 (void)strlcpy(thost, url, len + 1);
403 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
404 ep++;
405 *path = ftp_strdup(ep);
406 }
407
408 cp = strchr(thost, '@'); /* look for user[:pass]@ in URLs */
409 if (cp != NULL) {
410 if (*utype == FTP_URL_T)
411 anonftp = 0; /* disable anonftp */
412 *uuser = thost;
413 *cp = '\0';
414 thost = ftp_strdup(cp + 1);
415 cp = strchr(*uuser, ':');
416 if (cp != NULL) {
417 *cp = '\0';
418 *pass = ftp_strdup(cp + 1);
419 }
420 url_decode(*uuser);
421 if (*pass)
422 url_decode(*pass);
423 }
424
425 #ifdef INET6
426 /*
427 * Check if thost is an encoded IPv6 address, as per
428 * RFC 3986:
429 * `[' ipv6-address ']'
430 */
431 if (*thost == '[') {
432 cp = thost + 1;
433 if ((ep = strchr(cp, ']')) == NULL ||
434 (ep[1] != '\0' && ep[1] != ':')) {
435 warnx("Invalid address `%s' in %s `%s'",
436 thost, desc, origurl);
437 goto cleanup_parse_url;
438 }
439 len = ep - cp; /* change `[xyz]' -> `xyz' */
440 memmove(thost, thost + 1, len);
441 thost[len] = '\0';
442 if (! isipv6addr(thost)) {
443 warnx("Invalid IPv6 address `%s' in %s `%s'",
444 thost, desc, origurl);
445 goto cleanup_parse_url;
446 }
447 cp = ep + 1;
448 if (*cp == ':')
449 cp++;
450 else
451 cp = NULL;
452 } else
453 #endif /* INET6 */
454 if ((cp = strchr(thost, ':')) != NULL)
455 *cp++ = '\0';
456 *host = thost;
457
458 /* look for [:port] */
459 if (cp != NULL) {
460 unsigned long nport;
461
462 nport = strtoul(cp, &ep, 10);
463 if (*cp == '\0' || *ep != '\0' ||
464 nport < 1 || nport > MAX_IN_PORT_T) {
465 warnx("Unknown port `%s' in %s `%s'",
466 cp, desc, origurl);
467 goto cleanup_parse_url;
468 }
469 *portnum = nport;
470 tport = cp;
471 }
472
473 if (tport != NULL)
474 *port = ftp_strdup(tport);
475 if (*path == NULL) {
476 const char *emptypath = "/";
477 if (*utype == FTP_URL_T) /* skip first / for ftp URLs */
478 emptypath++;
479 *path = ftp_strdup(emptypath);
480 }
481
482 DPRINTF("parse_url: user `%s' pass `%s' host %s port %s(%d) "
483 "path `%s'\n",
484 STRorNULL(*uuser), STRorNULL(*pass),
485 STRorNULL(*host), STRorNULL(*port),
486 *portnum ? *portnum : -1, STRorNULL(*path));
487
488 return (0);
489 }
490
491 sigjmp_buf httpabort;
492
493 /*
494 * Retrieve URL, via a proxy if necessary, using HTTP.
495 * If proxyenv is set, use that for the proxy, otherwise try ftp_proxy or
496 * http_proxy/https_proxy as appropriate.
497 * Supports HTTP redirects.
498 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
499 * is still open (e.g, ftp xfer with trailing /)
500 */
501 static int
502 fetch_url(const char *url, const char *proxyenv, char *proxyauth, char *wwwauth)
503 {
504 struct addrinfo hints, *res, *res0 = NULL;
505 int error;
506 sigfunc volatile oldint;
507 sigfunc volatile oldpipe;
508 sigfunc volatile oldalrm;
509 sigfunc volatile oldquit;
510 int volatile s;
511 struct stat sb;
512 int volatile ischunked;
513 int volatile isproxy;
514 int volatile rval;
515 int volatile hcode;
516 int len;
517 size_t flen;
518 static size_t bufsize;
519 static char *xferbuf;
520 const char *cp, *token;
521 char *ep;
522 char buf[FTPBUFLEN];
523 const char *errormsg;
524 char *volatile savefile;
525 char *volatile auth;
526 char *volatile location;
527 char *volatile message;
528 char *uuser, *pass, *host, *port, *path;
529 char *volatile decodedpath;
530 char *puser, *ppass, *useragent;
531 off_t hashbytes, rangestart, rangeend, entitylen;
532 int (*volatile closefunc)(FILE *);
533 FETCH *volatile fin;
534 FILE *volatile fout;
535 const char *volatile penv = proxyenv;
536 time_t mtime;
537 url_t urltype;
538 in_port_t portnum;
539 #ifdef WITH_SSL
540 void *ssl;
541 #endif
542
543 DPRINTF("%s: `%s' proxyenv `%s'\n", __func__, url, STRorNULL(penv));
544
545 oldquit = oldalrm = oldint = oldpipe = NULL;
546 closefunc = NULL;
547 fin = NULL;
548 fout = NULL;
549 s = -1;
550 savefile = NULL;
551 auth = location = message = NULL;
552 ischunked = isproxy = hcode = 0;
553 rval = 1;
554 uuser = pass = host = path = decodedpath = puser = ppass = NULL;
555
556 if (sigsetjmp(httpabort, 1))
557 goto cleanup_fetch_url;
558
559 if (parse_url(url, "URL", &urltype, &uuser, &pass, &host, &port,
560 &portnum, &path) == -1)
561 goto cleanup_fetch_url;
562
563 if (urltype == FILE_URL_T && ! EMPTYSTRING(host)
564 && strcasecmp(host, "localhost") != 0) {
565 warnx("No support for non local file URL `%s'", url);
566 goto cleanup_fetch_url;
567 }
568
569 if (EMPTYSTRING(path)) {
570 if (urltype == FTP_URL_T) {
571 rval = fetch_ftp(url);
572 goto cleanup_fetch_url;
573 }
574 if (!IS_HTTP_TYPE(urltype) || outfile == NULL) {
575 warnx("Invalid URL (no file after host) `%s'", url);
576 goto cleanup_fetch_url;
577 }
578 }
579
580 decodedpath = ftp_strdup(path);
581 url_decode(decodedpath);
582
583 if (outfile)
584 savefile = outfile;
585 else {
586 cp = strrchr(decodedpath, '/'); /* find savefile */
587 if (cp != NULL)
588 savefile = ftp_strdup(cp + 1);
589 else
590 savefile = ftp_strdup(decodedpath);
591 }
592 DPRINTF("%s: savefile `%s'\n", __func__, savefile);
593 if (EMPTYSTRING(savefile)) {
594 if (urltype == FTP_URL_T) {
595 rval = fetch_ftp(url);
596 goto cleanup_fetch_url;
597 }
598 warnx("No file after directory (you must specify an "
599 "output file) `%s'", url);
600 goto cleanup_fetch_url;
601 }
602
603 restart_point = 0;
604 filesize = -1;
605 rangestart = rangeend = entitylen = -1;
606 mtime = -1;
607 if (restartautofetch) {
608 if (stat(savefile, &sb) == 0)
609 restart_point = sb.st_size;
610 }
611 if (urltype == FILE_URL_T) { /* file:// URLs */
612 direction = "copied";
613 fin = fetch_open(decodedpath, "r");
614 if (fin == NULL) {
615 warn("Can't open `%s'", decodedpath);
616 goto cleanup_fetch_url;
617 }
618 if (fstat(fetch_fileno(fin), &sb) == 0) {
619 mtime = sb.st_mtime;
620 filesize = sb.st_size;
621 }
622 if (restart_point) {
623 if (lseek(fetch_fileno(fin), restart_point, SEEK_SET) < 0) {
624 warn("Can't seek to restart `%s'",
625 decodedpath);
626 goto cleanup_fetch_url;
627 }
628 }
629 if (verbose) {
630 fprintf(ttyout, "Copying %s", decodedpath);
631 if (restart_point)
632 fprintf(ttyout, " (restarting at " LLF ")",
633 (LLT)restart_point);
634 fputs("\n", ttyout);
635 }
636 if (0 == rcvbuf_size) {
637 rcvbuf_size = 8 * 1024; /* XXX */
638 }
639 } else { /* ftp:// or http:// URLs */
640 const char *leading;
641 int hasleading;
642
643 if (penv == NULL) {
644 #ifdef WITH_SSL
645 if (urltype == HTTPS_URL_T)
646 penv = getoptionvalue("https_proxy");
647 #endif
648 if (penv == NULL && IS_HTTP_TYPE(urltype))
649 penv = getoptionvalue("http_proxy");
650 else if (urltype == FTP_URL_T)
651 penv = getoptionvalue("ftp_proxy");
652 }
653 direction = "retrieved";
654 if (! EMPTYSTRING(penv)) { /* use proxy */
655 url_t purltype;
656 char *phost, *ppath;
657 char *pport, *no_proxy;
658 in_port_t pportnum;
659
660 isproxy = 1;
661
662 /* check URL against list of no_proxied sites */
663 no_proxy = getoptionvalue("no_proxy");
664 if (! EMPTYSTRING(no_proxy)) {
665 char *np, *np_copy, *np_iter;
666 unsigned long np_port;
667 size_t hlen, plen;
668
669 np_iter = np_copy = ftp_strdup(no_proxy);
670 hlen = strlen(host);
671 while ((cp = strsep(&np_iter, " ,")) != NULL) {
672 if (*cp == '\0')
673 continue;
674 if ((np = strrchr(cp, ':')) != NULL) {
675 *np++ = '\0';
676 np_port = strtoul(np, &ep, 10);
677 if (*np == '\0' || *ep != '\0')
678 continue;
679 if (np_port != portnum)
680 continue;
681 }
682 plen = strlen(cp);
683 if (hlen < plen)
684 continue;
685 if (strncasecmp(host + hlen - plen,
686 cp, plen) == 0) {
687 isproxy = 0;
688 break;
689 }
690 }
691 FREEPTR(np_copy);
692 if (isproxy == 0 && urltype == FTP_URL_T) {
693 rval = fetch_ftp(url);
694 goto cleanup_fetch_url;
695 }
696 }
697
698 if (isproxy) {
699 if (restart_point) {
700 warnx("Can't restart via proxy URL `%s'",
701 penv);
702 goto cleanup_fetch_url;
703 }
704 if (parse_url(penv, "proxy URL", &purltype,
705 &puser, &ppass, &phost, &pport, &pportnum,
706 &ppath) == -1)
707 goto cleanup_fetch_url;
708
709 if ((!IS_HTTP_TYPE(purltype)
710 && purltype != FTP_URL_T) ||
711 EMPTYSTRING(phost) ||
712 (! EMPTYSTRING(ppath)
713 && strcmp(ppath, "/") != 0)) {
714 warnx("Malformed proxy URL `%s'", penv);
715 FREEPTR(phost);
716 FREEPTR(pport);
717 FREEPTR(ppath);
718 goto cleanup_fetch_url;
719 }
720 if (isipv6addr(host) &&
721 strchr(host, '%') != NULL) {
722 warnx(
723 "Scoped address notation `%s' disallowed via web proxy",
724 host);
725 FREEPTR(phost);
726 FREEPTR(pport);
727 FREEPTR(ppath);
728 goto cleanup_fetch_url;
729 }
730
731 FREEPTR(host);
732 host = phost;
733 FREEPTR(port);
734 port = pport;
735 FREEPTR(path);
736 path = ftp_strdup(url);
737 FREEPTR(ppath);
738 urltype = purltype;
739 }
740 } /* ! EMPTYSTRING(penv) */
741
742 memset(&hints, 0, sizeof(hints));
743 hints.ai_flags = 0;
744 hints.ai_family = family;
745 hints.ai_socktype = SOCK_STREAM;
746 hints.ai_protocol = 0;
747 error = getaddrinfo(host, port, &hints, &res0);
748 if (error) {
749 warnx("Can't LOOKUP `%s:%s': %s", host, port,
750 (error == EAI_SYSTEM) ? strerror(errno)
751 : gai_strerror(error));
752 goto cleanup_fetch_url;
753 }
754 if (res0->ai_canonname)
755 host = res0->ai_canonname;
756
757 s = -1;
758 #ifdef WITH_SSL
759 ssl = NULL;
760 #endif
761 for (res = res0; res; res = res->ai_next) {
762 char hname[NI_MAXHOST], sname[NI_MAXSERV];
763
764 ai_unmapped(res);
765 if (getnameinfo(res->ai_addr, res->ai_addrlen,
766 hname, sizeof(hname), sname, sizeof(sname),
767 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
768 strlcpy(hname, "?", sizeof(hname));
769 strlcpy(sname, "?", sizeof(sname));
770 }
771
772 if (verbose && res0->ai_next) {
773 fprintf(ttyout, "Trying %s:%s ...\n",
774 hname, sname);
775 }
776
777 s = socket(res->ai_family, SOCK_STREAM,
778 res->ai_protocol);
779 if (s < 0) {
780 warn(
781 "Can't create socket for connection to "
782 "`%s:%s'", hname, sname);
783 continue;
784 }
785
786 if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
787 verbose || !res->ai_next) < 0) {
788 close(s);
789 s = -1;
790 continue;
791 }
792
793 #ifdef WITH_SSL
794 if (urltype == HTTPS_URL_T) {
795 if ((ssl = fetch_start_ssl(s, host)) == NULL) {
796 close(s);
797 s = -1;
798 continue;
799 }
800 }
801 #endif
802
803 /* success */
804 break;
805 }
806
807 if (s < 0) {
808 warnx("Can't connect to `%s:%s'", host, port);
809 goto cleanup_fetch_url;
810 }
811
812 oldalrm = xsignal(SIGALRM, timeouthttp);
813 alarmtimer(quit_time ? quit_time : 60);
814 fin = fetch_fdopen(s, "r+");
815 fetch_set_ssl(fin, ssl);
816 alarmtimer(0);
817
818 alarmtimer(quit_time ? quit_time : 60);
819 /*
820 * Construct and send the request.
821 */
822 if (verbose)
823 fprintf(ttyout, "Requesting %s\n", url);
824 leading = " (";
825 hasleading = 0;
826 if (isproxy) {
827 if (verbose) {
828 fprintf(ttyout, "%svia %s:%s", leading,
829 host, port);
830 leading = ", ";
831 hasleading++;
832 }
833 fetch_printf(fin, "GET %s HTTP/1.0\r\n", path);
834 if (flushcache)
835 fetch_printf(fin, "Pragma: no-cache\r\n");
836 } else {
837 fetch_printf(fin, "GET %s HTTP/1.1\r\n", path);
838 if (strchr(host, ':')) {
839 char *h, *p;
840
841 /*
842 * strip off IPv6 scope identifier, since it is
843 * local to the node
844 */
845 h = ftp_strdup(host);
846 if (isipv6addr(h) &&
847 (p = strchr(h, '%')) != NULL) {
848 *p = '\0';
849 }
850 fetch_printf(fin, "Host: [%s]", h);
851 free(h);
852 } else
853 fetch_printf(fin, "Host: %s", host);
854 #ifdef WITH_SSL
855 if ((urltype == HTTP_URL_T && portnum != HTTP_PORT) ||
856 (urltype == HTTPS_URL_T && portnum != HTTPS_PORT))
857 #else
858 if (portnum != HTTP_PORT)
859 #endif
860 fetch_printf(fin, ":%u", portnum);
861 fetch_printf(fin, "\r\n");
862 fetch_printf(fin, "Accept: */*\r\n");
863 fetch_printf(fin, "Connection: close\r\n");
864 if (restart_point) {
865 fputs(leading, ttyout);
866 fetch_printf(fin, "Range: bytes=" LLF "-\r\n",
867 (LLT)restart_point);
868 fprintf(ttyout, "restarting at " LLF,
869 (LLT)restart_point);
870 leading = ", ";
871 hasleading++;
872 }
873 if (flushcache)
874 fetch_printf(fin, "Cache-Control: no-cache\r\n");
875 }
876 if ((useragent=getenv("FTPUSERAGENT")) != NULL) {
877 fetch_printf(fin, "User-Agent: %s\r\n", useragent);
878 } else {
879 fetch_printf(fin, "User-Agent: %s/%s\r\n",
880 FTP_PRODUCT, FTP_VERSION);
881 }
882 if (wwwauth) {
883 if (verbose) {
884 fprintf(ttyout, "%swith authorization",
885 leading);
886 leading = ", ";
887 hasleading++;
888 }
889 fetch_printf(fin, "Authorization: %s\r\n", wwwauth);
890 }
891 if (proxyauth) {
892 if (verbose) {
893 fprintf(ttyout,
894 "%swith proxy authorization", leading);
895 leading = ", ";
896 hasleading++;
897 }
898 fetch_printf(fin, "Proxy-Authorization: %s\r\n", proxyauth);
899 }
900 if (verbose && hasleading)
901 fputs(")\n", ttyout);
902 fetch_printf(fin, "\r\n");
903 if (fetch_flush(fin) == EOF) {
904 warn("Writing HTTP request");
905 alarmtimer(0);
906 goto cleanup_fetch_url;
907 }
908 alarmtimer(0);
909
910 /* Read the response */
911 alarmtimer(quit_time ? quit_time : 60);
912 len = fetch_getline(fin, buf, sizeof(buf), &errormsg);
913 alarmtimer(0);
914 if (len < 0) {
915 if (*errormsg == '\n')
916 errormsg++;
917 warnx("Receiving HTTP reply: %s", errormsg);
918 goto cleanup_fetch_url;
919 }
920 while (len > 0 && (ISLWS(buf[len-1])))
921 buf[--len] = '\0';
922 DPRINTF("%s: received `%s'\n", __func__, buf);
923
924 /* Determine HTTP response code */
925 cp = strchr(buf, ' ');
926 if (cp == NULL)
927 goto improper;
928 else
929 cp++;
930 hcode = strtol(cp, &ep, 10);
931 if (*ep != '\0' && !isspace((unsigned char)*ep))
932 goto improper;
933 message = ftp_strdup(cp);
934
935 /* Read the rest of the header. */
936 while (1) {
937 alarmtimer(quit_time ? quit_time : 60);
938 len = fetch_getline(fin, buf, sizeof(buf), &errormsg);
939 alarmtimer(0);
940 if (len < 0) {
941 if (*errormsg == '\n')
942 errormsg++;
943 warnx("Receiving HTTP reply: %s", errormsg);
944 goto cleanup_fetch_url;
945 }
946 while (len > 0 && (ISLWS(buf[len-1])))
947 buf[--len] = '\0';
948 if (len == 0)
949 break;
950 DPRINTF("%s: received `%s'\n", __func__, buf);
951
952 /*
953 * Look for some headers
954 */
955
956 cp = buf;
957
958 if (match_token(&cp, "Content-Length:")) {
959 filesize = STRTOLL(cp, &ep, 10);
960 if (filesize < 0 || *ep != '\0')
961 goto improper;
962 DPRINTF("%s: parsed len as: " LLF "\n",
963 __func__, (LLT)filesize);
964
965 } else if (match_token(&cp, "Content-Range:")) {
966 if (! match_token(&cp, "bytes"))
967 goto improper;
968
969 if (*cp == '*')
970 cp++;
971 else {
972 rangestart = STRTOLL(cp, &ep, 10);
973 if (rangestart < 0 || *ep != '-')
974 goto improper;
975 cp = ep + 1;
976 rangeend = STRTOLL(cp, &ep, 10);
977 if (rangeend < 0 || rangeend < rangestart)
978 goto improper;
979 cp = ep;
980 }
981 if (*cp != '/')
982 goto improper;
983 cp++;
984 if (*cp == '*')
985 cp++;
986 else {
987 entitylen = STRTOLL(cp, &ep, 10);
988 if (entitylen < 0)
989 goto improper;
990 cp = ep;
991 }
992 if (*cp != '\0')
993 goto improper;
994
995 #ifndef NO_DEBUG
996 if (ftp_debug) {
997 fprintf(ttyout, "parsed range as: ");
998 if (rangestart == -1)
999 fprintf(ttyout, "*");
1000 else
1001 fprintf(ttyout, LLF "-" LLF,
1002 (LLT)rangestart,
1003 (LLT)rangeend);
1004 fprintf(ttyout, "/" LLF "\n", (LLT)entitylen);
1005 }
1006 #endif
1007 if (! restart_point) {
1008 warnx(
1009 "Received unexpected Content-Range header");
1010 goto cleanup_fetch_url;
1011 }
1012
1013 } else if (match_token(&cp, "Last-Modified:")) {
1014 struct tm parsed;
1015 const char *t;
1016
1017 memset(&parsed, 0, sizeof(parsed));
1018 t = parse_rfc2616time(&parsed, cp);
1019 if (t != NULL) {
1020 parsed.tm_isdst = -1;
1021 if (*t == '\0')
1022 mtime = timegm(&parsed);
1023 #ifndef NO_DEBUG
1024 if (ftp_debug && mtime != -1) {
1025 fprintf(ttyout,
1026 "parsed time as: %s",
1027 rfc2822time(localtime(&mtime)));
1028 }
1029 #endif
1030 }
1031
1032 } else if (match_token(&cp, "Location:")) {
1033 location = ftp_strdup(cp);
1034 DPRINTF("%s: parsed location as `%s'\n",
1035 __func__, cp);
1036
1037 } else if (match_token(&cp, "Transfer-Encoding:")) {
1038 if (match_token(&cp, "binary")) {
1039 warnx(
1040 "Bogus transfer encoding `binary' (fetching anyway)");
1041 continue;
1042 }
1043 if (! (token = match_token(&cp, "chunked"))) {
1044 warnx(
1045 "Unsupported transfer encoding `%s'",
1046 token);
1047 goto cleanup_fetch_url;
1048 }
1049 ischunked++;
1050 DPRINTF("%s: using chunked encoding\n",
1051 __func__);
1052
1053 } else if (match_token(&cp, "Proxy-Authenticate:")
1054 || match_token(&cp, "WWW-Authenticate:")) {
1055 if (! (token = match_token(&cp, "Basic"))) {
1056 DPRINTF("%s: skipping unknown auth "
1057 "scheme `%s'\n", __func__, token);
1058 continue;
1059 }
1060 FREEPTR(auth);
1061 auth = ftp_strdup(token);
1062 DPRINTF("%s: parsed auth as `%s'\n",
1063 __func__, cp);
1064 }
1065
1066 }
1067 /* finished parsing header */
1068
1069 switch (hcode) {
1070 case 200:
1071 break;
1072 case 206:
1073 if (! restart_point) {
1074 warnx("Not expecting partial content header");
1075 goto cleanup_fetch_url;
1076 }
1077 break;
1078 case 300:
1079 case 301:
1080 case 302:
1081 case 303:
1082 case 305:
1083 case 307:
1084 if (EMPTYSTRING(location)) {
1085 warnx(
1086 "No redirection Location provided by server");
1087 goto cleanup_fetch_url;
1088 }
1089 if (redirect_loop++ > 5) {
1090 warnx("Too many redirections requested");
1091 goto cleanup_fetch_url;
1092 }
1093 if (hcode == 305) {
1094 if (verbose)
1095 fprintf(ttyout, "Redirected via %s\n",
1096 location);
1097 rval = fetch_url(url, location,
1098 proxyauth, wwwauth);
1099 } else {
1100 if (verbose)
1101 fprintf(ttyout, "Redirected to %s\n",
1102 location);
1103 rval = go_fetch(location);
1104 }
1105 goto cleanup_fetch_url;
1106 #ifndef NO_AUTH
1107 case 401:
1108 case 407:
1109 {
1110 char **authp;
1111 char *auser, *apass;
1112
1113 if (hcode == 401) {
1114 authp = &wwwauth;
1115 auser = uuser;
1116 apass = pass;
1117 } else {
1118 authp = &proxyauth;
1119 auser = puser;
1120 apass = ppass;
1121 }
1122 if (verbose || *authp == NULL ||
1123 auser == NULL || apass == NULL)
1124 fprintf(ttyout, "%s\n", message);
1125 if (EMPTYSTRING(auth)) {
1126 warnx(
1127 "No authentication challenge provided by server");
1128 goto cleanup_fetch_url;
1129 }
1130 if (*authp != NULL) {
1131 char reply[10];
1132
1133 fprintf(ttyout,
1134 "Authorization failed. Retry (y/n)? ");
1135 if (get_line(stdin, reply, sizeof(reply), NULL)
1136 < 0) {
1137 goto cleanup_fetch_url;
1138 }
1139 if (tolower((unsigned char)reply[0]) != 'y')
1140 goto cleanup_fetch_url;
1141 auser = NULL;
1142 apass = NULL;
1143 }
1144 if (auth_url(auth, authp, auser, apass) == 0) {
1145 rval = fetch_url(url, penv,
1146 proxyauth, wwwauth);
1147 memset(*authp, 0, strlen(*authp));
1148 FREEPTR(*authp);
1149 }
1150 goto cleanup_fetch_url;
1151 }
1152 #endif
1153 default:
1154 if (message)
1155 warnx("Error retrieving file `%s'", message);
1156 else
1157 warnx("Unknown error retrieving file");
1158 goto cleanup_fetch_url;
1159 }
1160 } /* end of ftp:// or http:// specific setup */
1161
1162 /* Open the output file. */
1163
1164 /*
1165 * Only trust filenames with special meaning if they came from
1166 * the command line
1167 */
1168 if (outfile == savefile) {
1169 if (strcmp(savefile, "-") == 0) {
1170 fout = stdout;
1171 } else if (*savefile == '|') {
1172 #if 0
1173 oldpipe = xsignal(SIGPIPE, SIG_IGN);
1174 fout = popen(savefile + 1, "w");
1175 if (fout == NULL) {
1176 warn("Can't execute `%s'", savefile + 1);
1177 goto cleanup_fetch_url;
1178 }
1179 closefunc = pclose;
1180 #endif
1181 }
1182 }
1183 if (fout == NULL) {
1184 if ((rangeend != -1 && rangeend <= restart_point) ||
1185 (rangestart == -1 && filesize != -1 && filesize <= restart_point)) {
1186 /* already done */
1187 if (verbose)
1188 fprintf(ttyout, "already done\n");
1189 rval = 0;
1190 goto cleanup_fetch_url;
1191 }
1192 if (restart_point && rangestart != -1) {
1193 if (entitylen != -1)
1194 filesize = entitylen;
1195 if (rangestart != restart_point) {
1196 warnx(
1197 "Size of `%s' differs from save file `%s'",
1198 url, savefile);
1199 goto cleanup_fetch_url;
1200 }
1201 fout = fopen(savefile, "a");
1202 } else
1203 fout = fopen(savefile, "w");
1204 if (fout == NULL) {
1205 warn("Can't open `%s'", savefile);
1206 goto cleanup_fetch_url;
1207 }
1208 closefunc = fclose;
1209 }
1210
1211 /* Trap signals */
1212 oldquit = xsignal(SIGQUIT, psummary);
1213 oldint = xsignal(SIGINT, aborthttp);
1214
1215 assert(rcvbuf_size > 0);
1216 if ((size_t)rcvbuf_size > bufsize) {
1217 if (xferbuf)
1218 (void)free(xferbuf);
1219 bufsize = rcvbuf_size;
1220 xferbuf = ftp_malloc(bufsize);
1221 }
1222
1223 bytes = 0;
1224 hashbytes = mark;
1225 if (oldalrm) {
1226 (void)xsignal(SIGALRM, oldalrm);
1227 oldalrm = NULL;
1228 }
1229 progressmeter(-1);
1230
1231 /* Finally, suck down the file. */
1232 do {
1233 long chunksize;
1234 short lastchunk;
1235
1236 chunksize = 0;
1237 lastchunk = 0;
1238 /* read chunk-size */
1239 if (ischunked) {
1240 if (fetch_getln(xferbuf, bufsize, fin) == NULL) {
1241 warnx("Unexpected EOF reading chunk-size");
1242 goto cleanup_fetch_url;
1243 }
1244 errno = 0;
1245 chunksize = strtol(xferbuf, &ep, 16);
1246 if (ep == xferbuf) {
1247 warnx("Invalid chunk-size");
1248 goto cleanup_fetch_url;
1249 }
1250 if (errno == ERANGE || chunksize < 0) {
1251 errno = ERANGE;
1252 warn("Chunk-size `%.*s'",
1253 (int)(ep-xferbuf), xferbuf);
1254 goto cleanup_fetch_url;
1255 }
1256
1257 /*
1258 * XXX: Work around bug in Apache 1.3.9 and
1259 * 1.3.11, which incorrectly put trailing
1260 * space after the chunk-size.
1261 */
1262 while (*ep == ' ')
1263 ep++;
1264
1265 /* skip [ chunk-ext ] */
1266 if (*ep == ';') {
1267 while (*ep && *ep != '\r')
1268 ep++;
1269 }
1270
1271 if (strcmp(ep, "\r\n") != 0) {
1272 warnx("Unexpected data following chunk-size");
1273 goto cleanup_fetch_url;
1274 }
1275 DPRINTF("%s: got chunk-size of " LLF "\n", __func__,
1276 (LLT)chunksize);
1277 if (chunksize == 0) {
1278 lastchunk = 1;
1279 goto chunkdone;
1280 }
1281 }
1282 /* transfer file or chunk */
1283 while (1) {
1284 struct timeval then, now, td;
1285 volatile off_t bufrem;
1286
1287 if (rate_get)
1288 (void)gettimeofday(&then, NULL);
1289 bufrem = rate_get ? rate_get : (off_t)bufsize;
1290 if (ischunked)
1291 bufrem = MIN(chunksize, bufrem);
1292 while (bufrem > 0) {
1293 flen = fetch_read(xferbuf, sizeof(char),
1294 MIN((off_t)bufsize, bufrem), fin);
1295 if (flen <= 0)
1296 goto chunkdone;
1297 bytes += flen;
1298 bufrem -= flen;
1299 if (fwrite(xferbuf, sizeof(char), flen, fout)
1300 != flen) {
1301 warn("Writing `%s'", savefile);
1302 goto cleanup_fetch_url;
1303 }
1304 if (hash && !progress) {
1305 while (bytes >= hashbytes) {
1306 (void)putc('#', ttyout);
1307 hashbytes += mark;
1308 }
1309 (void)fflush(ttyout);
1310 }
1311 if (ischunked) {
1312 chunksize -= flen;
1313 if (chunksize <= 0)
1314 break;
1315 }
1316 }
1317 if (rate_get) {
1318 while (1) {
1319 (void)gettimeofday(&now, NULL);
1320 timersub(&now, &then, &td);
1321 if (td.tv_sec > 0)
1322 break;
1323 usleep(1000000 - td.tv_usec);
1324 }
1325 }
1326 if (ischunked && chunksize <= 0)
1327 break;
1328 }
1329 /* read CRLF after chunk*/
1330 chunkdone:
1331 if (ischunked) {
1332 if (fetch_getln(xferbuf, bufsize, fin) == NULL) {
1333 alarmtimer(0);
1334 warnx("Unexpected EOF reading chunk CRLF");
1335 goto cleanup_fetch_url;
1336 }
1337 if (strcmp(xferbuf, "\r\n") != 0) {
1338 warnx("Unexpected data following chunk");
1339 goto cleanup_fetch_url;
1340 }
1341 if (lastchunk)
1342 break;
1343 }
1344 } while (ischunked);
1345
1346 /* XXX: deal with optional trailer & CRLF here? */
1347
1348 if (hash && !progress && bytes > 0) {
1349 if (bytes < mark)
1350 (void)putc('#', ttyout);
1351 (void)putc('\n', ttyout);
1352 }
1353 if (fetch_error(fin)) {
1354 warn("Reading file");
1355 goto cleanup_fetch_url;
1356 }
1357 progressmeter(1);
1358 (void)fflush(fout);
1359 if (closefunc == fclose && mtime != -1) {
1360 struct timeval tval[2];
1361
1362 (void)gettimeofday(&tval[0], NULL);
1363 tval[1].tv_sec = mtime;
1364 tval[1].tv_usec = 0;
1365 (*closefunc)(fout);
1366 fout = NULL;
1367
1368 if (utimes(savefile, tval) == -1) {
1369 fprintf(ttyout,
1370 "Can't change modification time to %s",
1371 rfc2822time(localtime(&mtime)));
1372 }
1373 }
1374 if (bytes > 0)
1375 ptransfer(0);
1376 bytes = 0;
1377
1378 rval = 0;
1379 goto cleanup_fetch_url;
1380
1381 improper:
1382 warnx("Improper response from `%s:%s'", host, port);
1383
1384 cleanup_fetch_url:
1385 if (oldint)
1386 (void)xsignal(SIGINT, oldint);
1387 if (oldpipe)
1388 (void)xsignal(SIGPIPE, oldpipe);
1389 if (oldalrm)
1390 (void)xsignal(SIGALRM, oldalrm);
1391 if (oldquit)
1392 (void)xsignal(SIGQUIT, oldpipe);
1393 if (fin != NULL)
1394 fetch_close(fin);
1395 else if (s != -1)
1396 close(s);
1397 if (closefunc != NULL && fout != NULL)
1398 (*closefunc)(fout);
1399 if (res0)
1400 freeaddrinfo(res0);
1401 if (savefile != outfile)
1402 FREEPTR(savefile);
1403 FREEPTR(uuser);
1404 if (pass != NULL)
1405 memset(pass, 0, strlen(pass));
1406 FREEPTR(pass);
1407 FREEPTR(host);
1408 FREEPTR(port);
1409 FREEPTR(path);
1410 FREEPTR(decodedpath);
1411 FREEPTR(puser);
1412 if (ppass != NULL)
1413 memset(ppass, 0, strlen(ppass));
1414 FREEPTR(ppass);
1415 FREEPTR(auth);
1416 FREEPTR(location);
1417 FREEPTR(message);
1418 return (rval);
1419 }
1420
1421 /*
1422 * Abort a HTTP retrieval
1423 */
1424 static void
1425 aborthttp(int notused)
1426 {
1427 char msgbuf[100];
1428 int len;
1429
1430 sigint_raised = 1;
1431 alarmtimer(0);
1432 if (fromatty) {
1433 len = snprintf(msgbuf, sizeof(msgbuf),
1434 "\n%s: HTTP fetch aborted.\n", getprogname());
1435 if (len > 0)
1436 write(fileno(ttyout), msgbuf, len);
1437 }
1438 siglongjmp(httpabort, 1);
1439 }
1440
1441 static void
1442 timeouthttp(int notused)
1443 {
1444 char msgbuf[100];
1445 int len;
1446
1447 alarmtimer(0);
1448 if (fromatty) {
1449 len = snprintf(msgbuf, sizeof(msgbuf),
1450 "\n%s: HTTP fetch timeout.\n", getprogname());
1451 if (len > 0)
1452 write(fileno(ttyout), msgbuf, len);
1453 }
1454 siglongjmp(httpabort, 1);
1455 }
1456
1457 /*
1458 * Retrieve ftp URL or classic ftp argument using FTP.
1459 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1460 * is still open (e.g, ftp xfer with trailing /)
1461 */
1462 static int
1463 fetch_ftp(const char *url)
1464 {
1465 char *cp, *xargv[5], rempath[MAXPATHLEN];
1466 char *host, *path, *dir, *file, *uuser, *pass;
1467 char *port;
1468 char cmdbuf[MAXPATHLEN];
1469 char dirbuf[4];
1470 int dirhasglob, filehasglob, rval, transtype, xargc;
1471 int oanonftp, oautologin;
1472 in_port_t portnum;
1473 url_t urltype;
1474
1475 DPRINTF("fetch_ftp: `%s'\n", url);
1476 host = path = dir = file = uuser = pass = NULL;
1477 port = NULL;
1478 rval = 1;
1479 transtype = TYPE_I;
1480
1481 if (STRNEQUAL(url, FTP_URL)) {
1482 if ((parse_url(url, "URL", &urltype, &uuser, &pass,
1483 &host, &port, &portnum, &path) == -1) ||
1484 (uuser != NULL && *uuser == '\0') ||
1485 EMPTYSTRING(host)) {
1486 warnx("Invalid URL `%s'", url);
1487 goto cleanup_fetch_ftp;
1488 }
1489 /*
1490 * Note: Don't url_decode(path) here. We need to keep the
1491 * distinction between "/" and "%2F" until later.
1492 */
1493
1494 /* check for trailing ';type=[aid]' */
1495 if (! EMPTYSTRING(path) && (cp = strrchr(path, ';')) != NULL) {
1496 if (strcasecmp(cp, ";type=a") == 0)
1497 transtype = TYPE_A;
1498 else if (strcasecmp(cp, ";type=i") == 0)
1499 transtype = TYPE_I;
1500 else if (strcasecmp(cp, ";type=d") == 0) {
1501 warnx(
1502 "Directory listing via a URL is not supported");
1503 goto cleanup_fetch_ftp;
1504 } else {
1505 warnx("Invalid suffix `%s' in URL `%s'", cp,
1506 url);
1507 goto cleanup_fetch_ftp;
1508 }
1509 *cp = 0;
1510 }
1511 } else { /* classic style `[user@]host:[file]' */
1512 urltype = CLASSIC_URL_T;
1513 host = ftp_strdup(url);
1514 cp = strchr(host, '@');
1515 if (cp != NULL) {
1516 *cp = '\0';
1517 uuser = host;
1518 anonftp = 0; /* disable anonftp */
1519 host = ftp_strdup(cp + 1);
1520 }
1521 cp = strchr(host, ':');
1522 if (cp != NULL) {
1523 *cp = '\0';
1524 path = ftp_strdup(cp + 1);
1525 }
1526 }
1527 if (EMPTYSTRING(host))
1528 goto cleanup_fetch_ftp;
1529
1530 /* Extract the file and (if present) directory name. */
1531 dir = path;
1532 if (! EMPTYSTRING(dir)) {
1533 /*
1534 * If we are dealing with classic `[user@]host:[path]' syntax,
1535 * then a path of the form `/file' (resulting from input of the
1536 * form `host:/file') means that we should do "CWD /" before
1537 * retrieving the file. So we set dir="/" and file="file".
1538 *
1539 * But if we are dealing with URLs like `ftp://host/path' then
1540 * a path of the form `/file' (resulting from a URL of the form
1541 * `ftp://host//file') means that we should do `CWD ' (with an
1542 * empty argument) before retrieving the file. So we set
1543 * dir="" and file="file".
1544 *
1545 * If the path does not contain / at all, we set dir=NULL.
1546 * (We get a path without any slashes if we are dealing with
1547 * classic `[user@]host:[file]' or URL `ftp://host/file'.)
1548 *
1549 * In all other cases, we set dir to a string that does not
1550 * include the final '/' that separates the dir part from the
1551 * file part of the path. (This will be the empty string if
1552 * and only if we are dealing with a path of the form `/file'
1553 * resulting from an URL of the form `ftp://host//file'.)
1554 */
1555 cp = strrchr(dir, '/');
1556 if (cp == dir && urltype == CLASSIC_URL_T) {
1557 file = cp + 1;
1558 (void)strlcpy(dirbuf, "/", sizeof(dirbuf));
1559 dir = dirbuf;
1560 } else if (cp != NULL) {
1561 *cp++ = '\0';
1562 file = cp;
1563 } else {
1564 file = dir;
1565 dir = NULL;
1566 }
1567 } else
1568 dir = NULL;
1569 if (urltype == FTP_URL_T && file != NULL) {
1570 url_decode(file);
1571 /* but still don't url_decode(dir) */
1572 }
1573 DPRINTF("fetch_ftp: user `%s' pass `%s' host %s port %s "
1574 "path `%s' dir `%s' file `%s'\n",
1575 STRorNULL(uuser), STRorNULL(pass),
1576 STRorNULL(host), STRorNULL(port),
1577 STRorNULL(path), STRorNULL(dir), STRorNULL(file));
1578
1579 dirhasglob = filehasglob = 0;
1580 if (doglob && urltype == CLASSIC_URL_T) {
1581 if (! EMPTYSTRING(dir) && strpbrk(dir, "*?[]{}") != NULL)
1582 dirhasglob = 1;
1583 if (! EMPTYSTRING(file) && strpbrk(file, "*?[]{}") != NULL)
1584 filehasglob = 1;
1585 }
1586
1587 /* Set up the connection */
1588 oanonftp = anonftp;
1589 if (connected)
1590 disconnect(0, NULL);
1591 anonftp = oanonftp;
1592 (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
1593 xargv[0] = cmdbuf;
1594 xargv[1] = host;
1595 xargv[2] = NULL;
1596 xargc = 2;
1597 if (port) {
1598 xargv[2] = port;
1599 xargv[3] = NULL;
1600 xargc = 3;
1601 }
1602 oautologin = autologin;
1603 /* don't autologin in setpeer(), use ftp_login() below */
1604 autologin = 0;
1605 setpeer(xargc, xargv);
1606 autologin = oautologin;
1607 if ((connected == 0) ||
1608 (connected == 1 && !ftp_login(host, uuser, pass))) {
1609 warnx("Can't connect or login to host `%s:%s'",
1610 host, port ? port : "?");
1611 goto cleanup_fetch_ftp;
1612 }
1613
1614 switch (transtype) {
1615 case TYPE_A:
1616 setascii(1, xargv);
1617 break;
1618 case TYPE_I:
1619 setbinary(1, xargv);
1620 break;
1621 default:
1622 errx(1, "fetch_ftp: unknown transfer type %d", transtype);
1623 }
1624
1625 /*
1626 * Change directories, if necessary.
1627 *
1628 * Note: don't use EMPTYSTRING(dir) below, because
1629 * dir=="" means something different from dir==NULL.
1630 */
1631 if (dir != NULL && !dirhasglob) {
1632 char *nextpart;
1633
1634 /*
1635 * If we are dealing with a classic `[user@]host:[path]'
1636 * (urltype is CLASSIC_URL_T) then we have a raw directory
1637 * name (not encoded in any way) and we can change
1638 * directories in one step.
1639 *
1640 * If we are dealing with an `ftp://host/path' URL
1641 * (urltype is FTP_URL_T), then RFC 3986 says we need to
1642 * send a separate CWD command for each unescaped "/"
1643 * in the path, and we have to interpret %hex escaping
1644 * *after* we find the slashes. It's possible to get
1645 * empty components here, (from multiple adjacent
1646 * slashes in the path) and RFC 3986 says that we should
1647 * still do `CWD ' (with a null argument) in such cases.
1648 *
1649 * Many ftp servers don't support `CWD ', so if there's an
1650 * error performing that command, bail out with a descriptive
1651 * message.
1652 *
1653 * Examples:
1654 *
1655 * host: dir="", urltype=CLASSIC_URL_T
1656 * logged in (to default directory)
1657 * host:file dir=NULL, urltype=CLASSIC_URL_T
1658 * "RETR file"
1659 * host:dir/ dir="dir", urltype=CLASSIC_URL_T
1660 * "CWD dir", logged in
1661 * ftp://host/ dir="", urltype=FTP_URL_T
1662 * logged in (to default directory)
1663 * ftp://host/dir/ dir="dir", urltype=FTP_URL_T
1664 * "CWD dir", logged in
1665 * ftp://host/file dir=NULL, urltype=FTP_URL_T
1666 * "RETR file"
1667 * ftp://host//file dir="", urltype=FTP_URL_T
1668 * "CWD ", "RETR file"
1669 * host:/file dir="/", urltype=CLASSIC_URL_T
1670 * "CWD /", "RETR file"
1671 * ftp://host///file dir="/", urltype=FTP_URL_T
1672 * "CWD ", "CWD ", "RETR file"
1673 * ftp://host/%2F/file dir="%2F", urltype=FTP_URL_T
1674 * "CWD /", "RETR file"
1675 * ftp://host/foo/file dir="foo", urltype=FTP_URL_T
1676 * "CWD foo", "RETR file"
1677 * ftp://host/foo/bar/file dir="foo/bar"
1678 * "CWD foo", "CWD bar", "RETR file"
1679 * ftp://host//foo/bar/file dir="/foo/bar"
1680 * "CWD ", "CWD foo", "CWD bar", "RETR file"
1681 * ftp://host/foo//bar/file dir="foo//bar"
1682 * "CWD foo", "CWD ", "CWD bar", "RETR file"
1683 * ftp://host/%2F/foo/bar/file dir="%2F/foo/bar"
1684 * "CWD /", "CWD foo", "CWD bar", "RETR file"
1685 * ftp://host/%2Ffoo/bar/file dir="%2Ffoo/bar"
1686 * "CWD /foo", "CWD bar", "RETR file"
1687 * ftp://host/%2Ffoo%2Fbar/file dir="%2Ffoo%2Fbar"
1688 * "CWD /foo/bar", "RETR file"
1689 * ftp://host/%2Ffoo%2Fbar%2Ffile dir=NULL
1690 * "RETR /foo/bar/file"
1691 *
1692 * Note that we don't need `dir' after this point.
1693 */
1694 do {
1695 if (urltype == FTP_URL_T) {
1696 nextpart = strchr(dir, '/');
1697 if (nextpart) {
1698 *nextpart = '\0';
1699 nextpart++;
1700 }
1701 url_decode(dir);
1702 } else
1703 nextpart = NULL;
1704 DPRINTF("fetch_ftp: dir `%s', nextpart `%s'\n",
1705 STRorNULL(dir), STRorNULL(nextpart));
1706 if (urltype == FTP_URL_T || *dir != '\0') {
1707 (void)strlcpy(cmdbuf, "cd", sizeof(cmdbuf));
1708 xargv[0] = cmdbuf;
1709 xargv[1] = dir;
1710 xargv[2] = NULL;
1711 dirchange = 0;
1712 cd(2, xargv);
1713 if (! dirchange) {
1714 if (*dir == '\0' && code == 500)
1715 fprintf(stderr,
1716 "\n"
1717 "ftp: The `CWD ' command (without a directory), which is required by\n"
1718 " RFC 3986 to support the empty directory in the URL pathname (`//'),\n"
1719 " conflicts with the server's conformance to RFC 959.\n"
1720 " Try the same URL without the `//' in the URL pathname.\n"
1721 "\n");
1722 goto cleanup_fetch_ftp;
1723 }
1724 }
1725 dir = nextpart;
1726 } while (dir != NULL);
1727 }
1728
1729 if (EMPTYSTRING(file)) {
1730 rval = -1;
1731 goto cleanup_fetch_ftp;
1732 }
1733
1734 if (dirhasglob) {
1735 (void)strlcpy(rempath, dir, sizeof(rempath));
1736 (void)strlcat(rempath, "/", sizeof(rempath));
1737 (void)strlcat(rempath, file, sizeof(rempath));
1738 file = rempath;
1739 }
1740
1741 /* Fetch the file(s). */
1742 xargc = 2;
1743 (void)strlcpy(cmdbuf, "get", sizeof(cmdbuf));
1744 xargv[0] = cmdbuf;
1745 xargv[1] = file;
1746 xargv[2] = NULL;
1747 if (dirhasglob || filehasglob) {
1748 int ointeractive;
1749
1750 ointeractive = interactive;
1751 interactive = 0;
1752 if (restartautofetch)
1753 (void)strlcpy(cmdbuf, "mreget", sizeof(cmdbuf));
1754 else
1755 (void)strlcpy(cmdbuf, "mget", sizeof(cmdbuf));
1756 xargv[0] = cmdbuf;
1757 mget(xargc, xargv);
1758 interactive = ointeractive;
1759 } else {
1760 if (outfile == NULL) {
1761 cp = strrchr(file, '/'); /* find savefile */
1762 if (cp != NULL)
1763 outfile = cp + 1;
1764 else
1765 outfile = file;
1766 }
1767 xargv[2] = (char *)outfile;
1768 xargv[3] = NULL;
1769 xargc++;
1770 if (restartautofetch)
1771 reget(xargc, xargv);
1772 else
1773 get(xargc, xargv);
1774 }
1775
1776 if ((code / 100) == COMPLETE)
1777 rval = 0;
1778
1779 cleanup_fetch_ftp:
1780 FREEPTR(port);
1781 FREEPTR(host);
1782 FREEPTR(path);
1783 FREEPTR(uuser);
1784 if (pass)
1785 memset(pass, 0, strlen(pass));
1786 FREEPTR(pass);
1787 return (rval);
1788 }
1789
1790 /*
1791 * Retrieve the given file to outfile.
1792 * Supports arguments of the form:
1793 * "host:path", "ftp://host/path" if $ftpproxy, call fetch_url() else
1794 * call fetch_ftp()
1795 * "http://host/path" call fetch_url() to use HTTP
1796 * "file:///path" call fetch_url() to copy
1797 * "about:..." print a message
1798 *
1799 * Returns 1 on failure, 0 on completed xfer, -1 if ftp connection
1800 * is still open (e.g, ftp xfer with trailing /)
1801 */
1802 static int
1803 go_fetch(const char *url)
1804 {
1805 char *proxyenv;
1806 char *p;
1807
1808 #ifndef NO_ABOUT
1809 /*
1810 * Check for about:*
1811 */
1812 if (STRNEQUAL(url, ABOUT_URL)) {
1813 url += sizeof(ABOUT_URL) -1;
1814 if (strcasecmp(url, "ftp") == 0 ||
1815 strcasecmp(url, "tnftp") == 0) {
1816 fputs(
1817 "This version of ftp has been enhanced by Luke Mewburn <lukem@NetBSD.org>\n"
1818 "for the NetBSD project. Execute `man ftp' for more details.\n", ttyout);
1819 } else if (strcasecmp(url, "lukem") == 0) {
1820 fputs(
1821 "Luke Mewburn is the author of most of the enhancements in this ftp client.\n"
1822 "Please email feedback to <lukem@NetBSD.org>.\n", ttyout);
1823 } else if (strcasecmp(url, "netbsd") == 0) {
1824 fputs(
1825 "NetBSD is a freely available and redistributable UNIX-like operating system.\n"
1826 "For more information, see http://www.NetBSD.org/\n", ttyout);
1827 } else if (strcasecmp(url, "version") == 0) {
1828 fprintf(ttyout, "Version: %s %s%s\n",
1829 FTP_PRODUCT, FTP_VERSION,
1830 #ifdef INET6
1831 ""
1832 #else
1833 " (-IPv6)"
1834 #endif
1835 );
1836 } else {
1837 fprintf(ttyout, "`%s' is an interesting topic.\n", url);
1838 }
1839 fputs("\n", ttyout);
1840 return (0);
1841 }
1842 #endif
1843
1844 /*
1845 * Check for file:// and http:// URLs.
1846 */
1847 if (STRNEQUAL(url, HTTP_URL)
1848 #ifdef WITH_SSL
1849 || STRNEQUAL(url, HTTPS_URL)
1850 #endif
1851 || STRNEQUAL(url, FILE_URL))
1852 return (fetch_url(url, NULL, NULL, NULL));
1853
1854 /*
1855 * If it contains "://" but does not begin with ftp://
1856 * or something that was already handled, then it's
1857 * unsupported.
1858 *
1859 * If it contains ":" but not "://" then we assume the
1860 * part before the colon is a host name, not an URL scheme,
1861 * so we don't try to match that here.
1862 */
1863 if ((p = strstr(url, "://")) != NULL && ! STRNEQUAL(url, FTP_URL))
1864 errx(1, "Unsupported URL scheme `%.*s'", (int)(p - url), url);
1865
1866 /*
1867 * Try FTP URL-style and host:file arguments next.
1868 * If ftpproxy is set with an FTP URL, use fetch_url()
1869 * Othewise, use fetch_ftp().
1870 */
1871 proxyenv = getoptionvalue("ftp_proxy");
1872 if (!EMPTYSTRING(proxyenv) && STRNEQUAL(url, FTP_URL))
1873 return (fetch_url(url, NULL, NULL, NULL));
1874
1875 return (fetch_ftp(url));
1876 }
1877
1878 /*
1879 * Retrieve multiple files from the command line,
1880 * calling go_fetch() for each file.
1881 *
1882 * If an ftp path has a trailing "/", the path will be cd-ed into and
1883 * the connection remains open, and the function will return -1
1884 * (to indicate the connection is alive).
1885 * If an error occurs the return value will be the offset+1 in
1886 * argv[] of the file that caused a problem (i.e, argv[x]
1887 * returns x+1)
1888 * Otherwise, 0 is returned if all files retrieved successfully.
1889 */
1890 int
1891 auto_fetch(int argc, char *argv[])
1892 {
1893 volatile int argpos, rval;
1894
1895 argpos = rval = 0;
1896
1897 if (sigsetjmp(toplevel, 1)) {
1898 if (connected)
1899 disconnect(0, NULL);
1900 if (rval > 0)
1901 rval = argpos + 1;
1902 return (rval);
1903 }
1904 (void)xsignal(SIGINT, intr);
1905 (void)xsignal(SIGPIPE, lostpeer);
1906
1907 /*
1908 * Loop through as long as there's files to fetch.
1909 */
1910 for (; (rval == 0) && (argpos < argc); argpos++) {
1911 if (strchr(argv[argpos], ':') == NULL)
1912 break;
1913 redirect_loop = 0;
1914 if (!anonftp)
1915 anonftp = 2; /* Handle "automatic" transfers. */
1916 rval = go_fetch(argv[argpos]);
1917 if (outfile != NULL && strcmp(outfile, "-") != 0
1918 && outfile[0] != '|')
1919 outfile = NULL;
1920 if (rval > 0)
1921 rval = argpos + 1;
1922 }
1923
1924 if (connected && rval != -1)
1925 disconnect(0, NULL);
1926 return (rval);
1927 }
1928
1929
1930 /*
1931 * Upload multiple files from the command line.
1932 *
1933 * If an error occurs the return value will be the offset+1 in
1934 * argv[] of the file that caused a problem (i.e, argv[x]
1935 * returns x+1)
1936 * Otherwise, 0 is returned if all files uploaded successfully.
1937 */
1938 int
1939 auto_put(int argc, char **argv, const char *uploadserver)
1940 {
1941 char *uargv[4], *path, *pathsep;
1942 int uargc, rval, argpos;
1943 size_t len;
1944 char cmdbuf[MAX_C_NAME];
1945
1946 (void)strlcpy(cmdbuf, "mput", sizeof(cmdbuf));
1947 uargv[0] = cmdbuf;
1948 uargv[1] = argv[0];
1949 uargc = 2;
1950 uargv[2] = uargv[3] = NULL;
1951 pathsep = NULL;
1952 rval = 1;
1953
1954 DPRINTF("auto_put: target `%s'\n", uploadserver);
1955
1956 path = ftp_strdup(uploadserver);
1957 len = strlen(path);
1958 if (path[len - 1] != '/' && path[len - 1] != ':') {
1959 /*
1960 * make sure we always pass a directory to auto_fetch
1961 */
1962 if (argc > 1) { /* more than one file to upload */
1963 len = strlen(uploadserver) + 2; /* path + "/" + "\0" */
1964 free(path);
1965 path = (char *)ftp_malloc(len);
1966 (void)strlcpy(path, uploadserver, len);
1967 (void)strlcat(path, "/", len);
1968 } else { /* single file to upload */
1969 (void)strlcpy(cmdbuf, "put", sizeof(cmdbuf));
1970 uargv[0] = cmdbuf;
1971 pathsep = strrchr(path, '/');
1972 if (pathsep == NULL) {
1973 pathsep = strrchr(path, ':');
1974 if (pathsep == NULL) {
1975 warnx("Invalid URL `%s'", path);
1976 goto cleanup_auto_put;
1977 }
1978 pathsep++;
1979 uargv[2] = ftp_strdup(pathsep);
1980 pathsep[0] = '/';
1981 } else
1982 uargv[2] = ftp_strdup(pathsep + 1);
1983 pathsep[1] = '\0';
1984 uargc++;
1985 }
1986 }
1987 DPRINTF("auto_put: URL `%s' argv[2] `%s'\n",
1988 path, STRorNULL(uargv[2]));
1989
1990 /* connect and cwd */
1991 rval = auto_fetch(1, &path);
1992 if(rval >= 0)
1993 goto cleanup_auto_put;
1994
1995 rval = 0;
1996
1997 /* target filename provided; upload 1 file */
1998 /* XXX : is this the best way? */
1999 if (uargc == 3) {
2000 uargv[1] = argv[0];
2001 put(uargc, uargv);
2002 if ((code / 100) != COMPLETE)
2003 rval = 1;
2004 } else { /* otherwise a target dir: upload all files to it */
2005 for(argpos = 0; argv[argpos] != NULL; argpos++) {
2006 uargv[1] = argv[argpos];
2007 mput(uargc, uargv);
2008 if ((code / 100) != COMPLETE) {
2009 rval = argpos + 1;
2010 break;
2011 }
2012 }
2013 }
2014
2015 cleanup_auto_put:
2016 free(path);
2017 FREEPTR(uargv[2]);
2018 return (rval);
2019 }
DragonFly BSD