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Make UEFI boot-platform build again
[haiku.git] / src / bin / network / ftp / ftp.c
blob70b0d916e95c48c96c7d234d912e49e43609dd9b
1 /* $NetBSD: ftp.c,v 1.132 2005/05/14 15:26:43 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 1996-2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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 /*
40 * Copyright (c) 1985, 1989, 1993, 1994
41 * The Regents of the University of California. All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 */
67
68 /*
69 * Copyright (C) 1997 and 1998 WIDE Project.
70 * All rights reserved.
71 *
72 * Redistribution and use in source and binary forms, with or without
73 * modification, are permitted provided that the following conditions
74 * are met:
75 * 1. Redistributions of source code must retain the above copyright
76 * notice, this list of conditions and the following disclaimer.
77 * 2. Redistributions in binary form must reproduce the above copyright
78 * notice, this list of conditions and the following disclaimer in the
79 * documentation and/or other materials provided with the distribution.
80 * 3. Neither the name of the project nor the names of its contributors
81 * may be used to endorse or promote products derived from this software
82 * without specific prior written permission.
83 *
84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
94 * SUCH DAMAGE.
95 */
96
97 #include <sys/cdefs.h>
98
99 #include <sys/types.h>
100 #include <sys/stat.h>
101 #include <sys/socket.h>
102 #include <sys/time.h>
103
104 #include <netinet/in.h>
105 #include <netinet/ip.h>
106 #include <arpa/inet.h>
107 #include <arpa/ftp.h>
108 #include <arpa/telnet.h>
109
110 #include <ctype.h>
111 #include <err.h>
112 #include <errno.h>
113 #include <fcntl.h>
114 #include <netdb.h>
115 #include <stdio.h>
116 #include <stdlib.h>
117 #include <string.h>
118 #include <time.h>
119 #include <unistd.h>
120 #include <stdarg.h>
121
122 #include "ftp_var.h"
123
124 volatile sig_atomic_t abrtflag;
125 volatile sig_atomic_t timeoutflag;
126
127 sigjmp_buf ptabort;
128 int ptabflg;
129 int ptflag = 0;
130 char pasv[BUFSIZ]; /* passive port for proxy data connection */
131
132 static int empty(FILE *, FILE *, int);
133
134 struct sockinet {
135 union sockunion {
136 struct sockaddr_in su_sin;
137 #ifdef INET6
138 struct sockaddr_in6 su_sin6;
139 #endif
140 } si_su;
141 #if !HAVE_SOCKADDR_SA_LEN
142 int si_len;
143 #endif
144 };
145
146 #if !HAVE_SOCKADDR_SA_LEN
147 # define su_len si_len
148 #else
149 # define su_len si_su.su_sin.sin_len
150 #endif
151 #define su_family si_su.su_sin.sin_family
152 #define su_port si_su.su_sin.sin_port
153
154 struct sockinet myctladdr, hisctladdr, data_addr;
155
156 char *
157 hookup(char *host, char *port)
158 {
159 int s = -1, error, portnum;
160 struct addrinfo hints, *res, *res0;
161 char hbuf[MAXHOSTNAMELEN];
162 static char hostnamebuf[MAXHOSTNAMELEN];
163 char *cause = "unknown";
164 socklen_t len;
165 int on = 1;
166
167 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
168 memset((char *)&myctladdr, 0, sizeof (myctladdr));
169 memset(&hints, 0, sizeof(hints));
170 portnum = parseport(port, FTP_PORT);
171 hints.ai_flags = AI_CANONNAME;
172 hints.ai_family = family;
173 hints.ai_socktype = SOCK_STREAM;
174 hints.ai_protocol = 0;
175 error = getaddrinfo(host, NULL, &hints, &res0);
176 if (error) {
177 warnx("%s", gai_strerror(error));
178 code = -1;
179 return (0);
180 }
181
182 if (res0->ai_canonname)
183 (void)strlcpy(hostnamebuf, res0->ai_canonname,
184 sizeof(hostnamebuf));
185 else
186 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
187 hostname = hostnamebuf;
188
189 for (res = res0; res; res = res->ai_next) {
190 /*
191 * make sure that ai_addr is NOT an IPv4 mapped address.
192 * IPv4 mapped address complicates too many things in FTP
193 * protocol handling, as FTP protocol is defined differently
194 * between IPv4 and IPv6.
195 *
196 * This may not be the best way to handle this situation,
197 * since the semantics of IPv4 mapped address is defined in
198 * the kernel. There are configurations where we should use
199 * IPv4 mapped address as native IPv6 address, not as
200 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
201 *
202 * More complete solution would be to have an additional
203 * getsockopt to grab "real" peername/sockname. "real"
204 * peername/sockname will be AF_INET if IPv4 mapped address
205 * is used to embed IPv4 address, and will be AF_INET6 if
206 * we use it as native. What a mess!
207 */
208 ai_unmapped(res);
209 #if 0 /*old behavior*/
210 if (res != res0) /* not on the first address */
211 #else
212 if (res0->ai_next) /* if we have multiple possibilities */
213 #endif
214 {
215 if (getnameinfo(res->ai_addr, res->ai_addrlen,
216 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
217 strlcpy(hbuf, "?", sizeof(hbuf));
218 fprintf(ttyout, "Trying %s...\n", hbuf);
219 }
220 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum);
221 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
222 if (s < 0) {
223 cause = "socket";
224 continue;
225 }
226 error = xconnect(s, res->ai_addr, res->ai_addrlen);
227 if (error) {
228 /* this "if" clause is to prevent print warning twice */
229 if (res->ai_next) {
230 if (getnameinfo(res->ai_addr, res->ai_addrlen,
231 hbuf, sizeof(hbuf), NULL, 0,
232 NI_NUMERICHOST))
233 strlcpy(hbuf, "?", sizeof(hbuf));
234 warn("connect to address %s", hbuf);
235 }
236 cause = "connect";
237 close(s);
238 s = -1;
239 continue;
240 }
241
242 /* finally we got one */
243 break;
244 }
245 if (s < 0) {
246 warn("%s", cause);
247 code = -1;
248 freeaddrinfo(res0);
249 return 0;
250 }
251 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
252 hisctladdr.su_len = res->ai_addrlen;
253 freeaddrinfo(res0);
254 res0 = res = NULL;
255
256 len = hisctladdr.su_len;
257 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
258 warn("getsockname");
259 code = -1;
260 goto bad;
261 }
262 myctladdr.su_len = len;
263
264 #ifdef IPTOS_LOWDELAY
265 if (hisctladdr.su_family == AF_INET) {
266 int tos = IPTOS_LOWDELAY;
267 if (setsockopt(s, IPPROTO_IP, IP_TOS,
268 (void *)&tos, sizeof(tos)) == -1) {
269 if (debug)
270 warn("setsockopt %s (ignored)",
271 "IPTOS_LOWDELAY");
272 }
273 }
274 #endif
275 cin = fdopen(s, "r");
276 cout = fdopen(s, "w");
277 if (cin == NULL || cout == NULL) {
278 warnx("fdopen failed.");
279 if (cin)
280 (void)fclose(cin);
281 if (cout)
282 (void)fclose(cout);
283 code = -1;
284 goto bad;
285 }
286 if (verbose)
287 fprintf(ttyout, "Connected to %s.\n", hostname);
288 if (getreply(0) > 2) { /* read startup message from server */
289 if (cin)
290 (void)fclose(cin);
291 if (cout)
292 (void)fclose(cout);
293 code = -1;
294 goto bad;
295 }
296
297 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
298 (void *)&on, sizeof(on)) == -1) {
299 if (debug)
300 warn("setsockopt %s (ignored)", "SO_OOBINLINE");
301 }
302
303 return (hostname);
304 bad:
305 (void)close(s);
306 return (NULL);
307 }
308
309 void
310 cmdabort(int notused)
311 {
312 int oerrno = errno;
313
314 sigint_raised = 1;
315 alarmtimer(0);
316 if (fromatty)
317 write(fileno(ttyout), "\n", 1);
318 abrtflag++;
319 if (ptflag)
320 siglongjmp(ptabort, 1);
321 errno = oerrno;
322 }
323
324 void
325 cmdtimeout(int notused)
326 {
327 int oerrno = errno;
328
329 alarmtimer(0);
330 if (fromatty)
331 write(fileno(ttyout), "\n", 1);
332 timeoutflag++;
333 if (ptflag)
334 siglongjmp(ptabort, 1);
335 errno = oerrno;
336 }
337
338 /*VARARGS*/
339 int
340 command(const char *fmt, ...)
341 {
342 va_list ap;
343 int r;
344 sigfunc oldsigint;
345
346 if (debug) {
347 fputs("---> ", ttyout);
348 va_start(ap, fmt);
349 if (strncmp("PASS ", fmt, 5) == 0)
350 fputs("PASS XXXX", ttyout);
351 else if (strncmp("ACCT ", fmt, 5) == 0)
352 fputs("ACCT XXXX", ttyout);
353 else
354 vfprintf(ttyout, fmt, ap);
355 va_end(ap);
356 putc('\n', ttyout);
357 }
358 if (cout == NULL) {
359 warnx("No control connection for command.");
360 code = -1;
361 return (0);
362 }
363
364 abrtflag = 0;
365
366 oldsigint = xsignal(SIGINT, cmdabort);
367
368 va_start(ap, fmt);
369 vfprintf(cout, fmt, ap);
370 va_end(ap);
371 fputs("\r\n", cout);
372 (void)fflush(cout);
373 cpend = 1;
374 r = getreply(!strcmp(fmt, "QUIT"));
375 if (abrtflag && oldsigint != SIG_IGN)
376 (*oldsigint)(SIGINT);
377 (void)xsignal(SIGINT, oldsigint);
378 return (r);
379 }
380
381 int
382 getreply(int expecteof)
383 {
384 char current_line[BUFSIZ]; /* last line of previous reply */
385 int c, n, line;
386 int dig;
387 int originalcode = 0, continuation = 0;
388 sigfunc oldsigint, oldsigalrm;
389 int pflag = 0;
390 char *cp, *pt = pasv;
391
392 abrtflag = 0;
393 timeoutflag = 0;
394
395 oldsigint = xsignal(SIGINT, cmdabort);
396 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
397
398 for (line = 0 ;; line++) {
399 dig = n = code = 0;
400 cp = current_line;
401 while (alarmtimer(60),((c = getc(cin)) != '\n')) {
402 if (c == IAC) { /* handle telnet commands */
403 switch (c = getc(cin)) {
404 case WILL:
405 case WONT:
406 c = getc(cin);
407 fprintf(cout, "%c%c%c", IAC, DONT, c);
408 (void)fflush(cout);
409 break;
410 case DO:
411 case DONT:
412 c = getc(cin);
413 fprintf(cout, "%c%c%c", IAC, WONT, c);
414 (void)fflush(cout);
415 break;
416 default:
417 break;
418 }
419 continue;
420 }
421 dig++;
422 if (c == EOF) {
423 /*
424 * these will get trashed by pswitch()
425 * in lostpeer()
426 */
427 int reply_timeoutflag = timeoutflag;
428 int reply_abrtflag = abrtflag;
429
430 alarmtimer(0);
431 if (expecteof && feof(cin)) {
432 (void)xsignal(SIGINT, oldsigint);
433 (void)xsignal(SIGALRM, oldsigalrm);
434 code = 221;
435 return (0);
436 }
437 cpend = 0;
438 lostpeer(0);
439 if (verbose) {
440 if (reply_timeoutflag)
441 fputs(
442 "421 Service not available, remote server timed out. Connection closed\n",
443 ttyout);
444 else if (reply_abrtflag)
445 fputs(
446 "421 Service not available, user interrupt. Connection closed.\n",
447 ttyout);
448 else
449 fputs(
450 "421 Service not available, remote server has closed connection.\n",
451 ttyout);
452 (void)fflush(ttyout);
453 }
454 code = 421;
455 (void)xsignal(SIGINT, oldsigint);
456 (void)xsignal(SIGALRM, oldsigalrm);
457 return (4);
458 }
459 if (c != '\r' && (verbose > 0 ||
460 ((verbose > -1 && n == '5' && dig > 4) &&
461 (((!n && c < '5') || (n && n < '5'))
462 || !retry_connect)))) {
463 if (proxflag &&
464 (dig == 1 || (dig == 5 && verbose == 0)))
465 fprintf(ttyout, "%s:", hostname);
466 (void)putc(c, ttyout);
467 }
468 if (dig < 4 && isdigit(c))
469 code = code * 10 + (c - '0');
470 if (!pflag && (code == 227 || code == 228))
471 pflag = 1;
472 else if (!pflag && code == 229)
473 pflag = 100;
474 if (dig > 4 && pflag == 1 && isdigit(c))
475 pflag = 2;
476 if (pflag == 2) {
477 if (c != '\r' && c != ')') {
478 if (pt < &pasv[sizeof(pasv) - 1])
479 *pt++ = c;
480 } else {
481 *pt = '\0';
482 pflag = 3;
483 }
484 }
485 if (pflag == 100 && c == '(')
486 pflag = 2;
487 if (dig == 4 && c == '-') {
488 if (continuation)
489 code = 0;
490 continuation++;
491 }
492 if (n == 0)
493 n = c;
494 if (cp < &current_line[sizeof(current_line) - 1])
495 *cp++ = c;
496 }
497 if (verbose > 0 || ((verbose > -1 && n == '5') &&
498 (n < '5' || !retry_connect))) {
499 (void)putc(c, ttyout);
500 (void)fflush (ttyout);
501 }
502 if (cp[-1] == '\r')
503 cp[-1] = '\0';
504 *cp = '\0';
505 if (line == 0)
506 (void)strlcpy(reply_string, current_line,
507 sizeof(reply_string));
508 if (line > 0 && code == 0 && reply_callback != NULL)
509 (*reply_callback)(current_line);
510 if (continuation && code != originalcode) {
511 if (originalcode == 0)
512 originalcode = code;
513 continue;
514 }
515 if (n != '1')
516 cpend = 0;
517 alarmtimer(0);
518 (void)xsignal(SIGINT, oldsigint);
519 (void)xsignal(SIGALRM, oldsigalrm);
520 if (code == 421 || originalcode == 421)
521 lostpeer(0);
522 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
523 (*oldsigint)(SIGINT);
524 if (timeoutflag && oldsigalrm != cmdtimeout &&
525 oldsigalrm != SIG_IGN)
526 (*oldsigalrm)(SIGINT);
527 return (n - '0');
528 }
529 }
530
531 static int
532 empty(FILE *cin, FILE *din, int sec)
533 {
534 int nr, nfd;
535 struct pollfd pfd[2];
536
537 nfd = 0;
538 if (cin) {
539 pfd[nfd].fd = fileno(cin);
540 pfd[nfd++].events = POLLIN;
541 }
542
543 if (din) {
544 pfd[nfd].fd = fileno(din);
545 pfd[nfd++].events = POLLIN;
546 }
547
548 if ((nr = xpoll(pfd, nfd, sec * 1000)) <= 0)
549 return nr;
550
551 nr = 0;
552 nfd = 0;
553 if (cin)
554 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
555 if (din)
556 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
557 return nr;
558 }
559
560 sigjmp_buf xferabort;
561
562 void
563 abortxfer(int notused)
564 {
565 char msgbuf[100];
566 size_t len;
567
568 sigint_raised = 1;
569 alarmtimer(0);
570 mflag = 0;
571 abrtflag = 0;
572 switch (direction[0]) {
573 case 'r':
574 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
575 break;
576 case 's':
577 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
578 break;
579 default:
580 errx(1, "abortxfer called with unknown direction `%s'",
581 direction);
582 }
583 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
584 sizeof(msgbuf));
585 write(fileno(ttyout), msgbuf, len);
586 siglongjmp(xferabort, 1);
587 }
588
589 void
590 sendrequest(const char *cmd, const char *local, const char *remote,
591 int printnames)
592 {
593 struct stat st;
594 int c, d;
595 FILE *fin, *dout;
596 int (*closefunc)(FILE *);
597 sigfunc oldintr, oldintp;
598 volatile off_t hashbytes;
599 char *lmode, *bufp;
600 static size_t bufsize;
601 static char *buf;
602 int oprogress;
603
604 #ifdef __GNUC__ /* to shut up gcc warnings */
605 (void)&fin;
606 (void)&dout;
607 (void)&closefunc;
608 (void)&oldintr;
609 (void)&oldintp;
610 (void)&lmode;
611 #endif
612
613 hashbytes = mark;
614 direction = "sent";
615 dout = NULL;
616 bytes = 0;
617 filesize = -1;
618 oprogress = progress;
619 if (verbose && printnames) {
620 if (local && *local != '-')
621 fprintf(ttyout, "local: %s ", local);
622 if (remote)
623 fprintf(ttyout, "remote: %s\n", remote);
624 }
625 if (proxy) {
626 proxtrans(cmd, local, remote);
627 return;
628 }
629 if (curtype != type)
630 changetype(type, 0);
631 closefunc = NULL;
632 oldintr = NULL;
633 oldintp = NULL;
634 lmode = "w";
635 if (sigsetjmp(xferabort, 1)) {
636 while (cpend)
637 (void)getreply(0);
638 code = -1;
639 goto cleanupsend;
640 }
641 (void)xsignal(SIGQUIT, psummary);
642 oldintr = xsignal(SIGINT, abortxfer);
643 if (strcmp(local, "-") == 0) {
644 fin = stdin;
645 progress = 0;
646 } else if (*local == '|') {
647 oldintp = xsignal(SIGPIPE, SIG_IGN);
648 fin = popen(local + 1, "r");
649 if (fin == NULL) {
650 warn("%s", local + 1);
651 code = -1;
652 goto cleanupsend;
653 }
654 progress = 0;
655 closefunc = pclose;
656 } else {
657 fin = fopen(local, "r");
658 if (fin == NULL) {
659 warn("local: %s", local);
660 code = -1;
661 goto cleanupsend;
662 }
663 closefunc = fclose;
664 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
665 fprintf(ttyout, "%s: not a plain file.\n", local);
666 code = -1;
667 goto cleanupsend;
668 }
669 filesize = st.st_size;
670 }
671 if (initconn()) {
672 code = -1;
673 goto cleanupsend;
674 }
675 if (sigsetjmp(xferabort, 1))
676 goto abort;
677
678 if (restart_point &&
679 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
680 int rc;
681
682 rc = -1;
683 switch (curtype) {
684 case TYPE_A:
685 rc = fseeko(fin, restart_point, SEEK_SET);
686 break;
687 case TYPE_I:
688 case TYPE_L:
689 rc = lseek(fileno(fin), restart_point, SEEK_SET);
690 break;
691 }
692 if (rc < 0) {
693 warn("local: %s", local);
694 goto cleanupsend;
695 }
696 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
697 goto cleanupsend;
698 lmode = "r+";
699 }
700 if (remote) {
701 if (command("%s %s", cmd, remote) != PRELIM)
702 goto cleanupsend;
703 } else {
704 if (command("%s", cmd) != PRELIM)
705 goto cleanupsend;
706 }
707 dirchange = 1;
708 dout = dataconn(lmode);
709 if (dout == NULL)
710 goto abort;
711
712 if (sndbuf_size > bufsize) {
713 if (buf)
714 (void)free(buf);
715 bufsize = sndbuf_size;
716 buf = xmalloc(bufsize);
717 }
718
719 progressmeter(-1);
720 oldintp = xsignal(SIGPIPE, SIG_IGN);
721
722 switch (curtype) {
723
724 case TYPE_I:
725 case TYPE_L:
726 if (rate_put) { /* rate limited */
727 while (1) {
728 struct timeval then, now, td;
729 off_t bufrem;
730
731 (void)gettimeofday(&then, NULL);
732 errno = c = d = 0;
733 bufrem = rate_put;
734 while (bufrem > 0) {
735 if ((c = read(fileno(fin), buf,
736 MIN(bufsize, bufrem))) <= 0)
737 goto senddone;
738 bytes += c;
739 bufrem -= c;
740 for (bufp = buf; c > 0;
741 c -= d, bufp += d)
742 if ((d = write(fileno(dout),
743 bufp, c)) <= 0)
744 break;
745 if (d < 0)
746 goto senddone;
747 if (hash &&
748 (!progress || filesize < 0) ) {
749 while (bytes >= hashbytes) {
750 (void)putc('#', ttyout);
751 hashbytes += mark;
752 }
753 (void)fflush(ttyout);
754 }
755 }
756 while (1) {
757 (void)gettimeofday(&now, NULL);
758 timersub(&now, &then, &td);
759 if (td.tv_sec > 0)
760 break;
761 usleep(1000000 - td.tv_usec);
762 }
763 }
764 } else { /* simpler/faster; no rate limit */
765 while (1) {
766 errno = c = d = 0;
767 if ((c = read(fileno(fin), buf, bufsize)) <= 0)
768 goto senddone;
769 bytes += c;
770 for (bufp = buf; c > 0; c -= d, bufp += d)
771 if ((d = write(fileno(dout), bufp, c))
772 <= 0)
773 break;
774 if (d < 0)
775 goto senddone;
776 if (hash && (!progress || filesize < 0) ) {
777 while (bytes >= hashbytes) {
778 (void)putc('#', ttyout);
779 hashbytes += mark;
780 }
781 (void)fflush(ttyout);
782 }
783 }
784 }
785 senddone:
786 if (hash && (!progress || filesize < 0) && bytes > 0) {
787 if (bytes < mark)
788 (void)putc('#', ttyout);
789 (void)putc('\n', ttyout);
790 }
791 if (c < 0)
792 warn("local: %s", local);
793 if (d < 0) {
794 if (errno != EPIPE)
795 warn("netout");
796 bytes = -1;
797 }
798 break;
799
800 case TYPE_A:
801 while ((c = getc(fin)) != EOF) {
802 if (c == '\n') {
803 while (hash && (!progress || filesize < 0) &&
804 (bytes >= hashbytes)) {
805 (void)putc('#', ttyout);
806 (void)fflush(ttyout);
807 hashbytes += mark;
808 }
809 if (ferror(dout))
810 break;
811 (void)putc('\r', dout);
812 bytes++;
813 }
814 (void)putc(c, dout);
815 bytes++;
816 #if 0 /* this violates RFC */
817 if (c == '\r') {
818 (void)putc('\0', dout);
819 bytes++;
820 }
821 #endif
822 }
823 if (hash && (!progress || filesize < 0)) {
824 if (bytes < hashbytes)
825 (void)putc('#', ttyout);
826 (void)putc('\n', ttyout);
827 }
828 if (ferror(fin))
829 warn("local: %s", local);
830 if (ferror(dout)) {
831 if (errno != EPIPE)
832 warn("netout");
833 bytes = -1;
834 }
835 break;
836 }
837
838 progressmeter(1);
839 if (closefunc != NULL) {
840 (*closefunc)(fin);
841 fin = NULL;
842 }
843 (void)fclose(dout);
844 dout = NULL;
845 (void)getreply(0);
846 if (bytes > 0)
847 ptransfer(0);
848 goto cleanupsend;
849
850 abort:
851 (void)xsignal(SIGINT, oldintr);
852 oldintr = NULL;
853 if (!cpend) {
854 code = -1;
855 goto cleanupsend;
856 }
857 if (data >= 0) {
858 (void)close(data);
859 data = -1;
860 }
861 if (dout) {
862 (void)fclose(dout);
863 dout = NULL;
864 }
865 (void)getreply(0);
866 code = -1;
867 if (bytes > 0)
868 ptransfer(0);
869
870 cleanupsend:
871 if (oldintr)
872 (void)xsignal(SIGINT, oldintr);
873 if (oldintp)
874 (void)xsignal(SIGPIPE, oldintp);
875 if (data >= 0) {
876 (void)close(data);
877 data = -1;
878 }
879 if (closefunc != NULL && fin != NULL)
880 (*closefunc)(fin);
881 if (dout)
882 (void)fclose(dout);
883 progress = oprogress;
884 restart_point = 0;
885 bytes = 0;
886 }
887
888 void
889 recvrequest(const char *cmd, const char *local, const char *remote,
890 const char *lmode, int printnames, int ignorespecial)
891 {
892 FILE *fout, *din;
893 int (*closefunc)(FILE *);
894 sigfunc oldintr, oldintp;
895 int c, d;
896 volatile int is_retr, tcrflag, bare_lfs;
897 static size_t bufsize;
898 static char *buf;
899 volatile off_t hashbytes;
900 struct stat st;
901 time_t mtime;
902 struct timeval tval[2];
903 int oprogress;
904 int opreserve;
905
906 #ifdef __GNUC__ /* to shut up gcc warnings */
907 (void)&local;
908 (void)&fout;
909 (void)&din;
910 (void)&closefunc;
911 (void)&oldintr;
912 (void)&oldintp;
913 #endif
914
915 fout = NULL;
916 din = NULL;
917 hashbytes = mark;
918 direction = "received";
919 bytes = 0;
920 bare_lfs = 0;
921 filesize = -1;
922 oprogress = progress;
923 opreserve = preserve;
924 is_retr = (strcmp(cmd, "RETR") == 0);
925 if (is_retr && verbose && printnames) {
926 if (local && (ignorespecial || *local != '-'))
927 fprintf(ttyout, "local: %s ", local);
928 if (remote)
929 fprintf(ttyout, "remote: %s\n", remote);
930 }
931 if (proxy && is_retr) {
932 proxtrans(cmd, local, remote);
933 return;
934 }
935 closefunc = NULL;
936 oldintr = NULL;
937 oldintp = NULL;
938 tcrflag = !crflag && is_retr;
939 if (sigsetjmp(xferabort, 1)) {
940 while (cpend)
941 (void)getreply(0);
942 code = -1;
943 goto cleanuprecv;
944 }
945 (void)xsignal(SIGQUIT, psummary);
946 oldintr = xsignal(SIGINT, abortxfer);
947 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
948 if (access(local, W_OK) < 0) {
949 char *dir = strrchr(local, '/');
950
951 if (errno != ENOENT && errno != EACCES) {
952 warn("local: %s", local);
953 code = -1;
954 goto cleanuprecv;
955 }
956 if (dir != NULL)
957 *dir = 0;
958 d = access(dir == local ? "/" :
959 dir ? local : ".", W_OK);
960 if (dir != NULL)
961 *dir = '/';
962 if (d < 0) {
963 warn("local: %s", local);
964 code = -1;
965 goto cleanuprecv;
966 }
967 if (!runique && errno == EACCES &&
968 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
969 warn("local: %s", local);
970 code = -1;
971 goto cleanuprecv;
972 }
973 if (runique && errno == EACCES &&
974 (local = gunique(local)) == NULL) {
975 code = -1;
976 goto cleanuprecv;
977 }
978 }
979 else if (runique && (local = gunique(local)) == NULL) {
980 code = -1;
981 goto cleanuprecv;
982 }
983 }
984 if (!is_retr) {
985 if (curtype != TYPE_A)
986 changetype(TYPE_A, 0);
987 } else {
988 if (curtype != type)
989 changetype(type, 0);
990 filesize = remotesize(remote, 0);
991 if (code == 421 || code == -1)
992 goto cleanuprecv;
993 }
994 if (initconn()) {
995 code = -1;
996 goto cleanuprecv;
997 }
998 if (sigsetjmp(xferabort, 1))
999 goto abort;
1000 if (is_retr && restart_point &&
1001 command("REST " LLF, (LLT) restart_point) != CONTINUE)
1002 goto cleanuprecv;
1003 if (! EMPTYSTRING(remote)) {
1004 if (command("%s %s", cmd, remote) != PRELIM)
1005 goto cleanuprecv;
1006 } else {
1007 if (command("%s", cmd) != PRELIM)
1008 goto cleanuprecv;
1009 }
1010 din = dataconn("r");
1011 if (din == NULL)
1012 goto abort;
1013 if (!ignorespecial && strcmp(local, "-") == 0) {
1014 fout = stdout;
1015 progress = 0;
1016 preserve = 0;
1017 } else if (!ignorespecial && *local == '|') {
1018 oldintp = xsignal(SIGPIPE, SIG_IGN);
1019 fout = popen(local + 1, "w");
1020 if (fout == NULL) {
1021 warn("%s", local+1);
1022 goto abort;
1023 }
1024 progress = 0;
1025 preserve = 0;
1026 closefunc = pclose;
1027 } else {
1028 fout = fopen(local, lmode);
1029 if (fout == NULL) {
1030 warn("local: %s", local);
1031 goto abort;
1032 }
1033 closefunc = fclose;
1034 }
1035
1036 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1037 progress = 0;
1038 preserve = 0;
1039 }
1040 if (rcvbuf_size > bufsize) {
1041 if (buf)
1042 (void)free(buf);
1043 bufsize = rcvbuf_size;
1044 buf = xmalloc(bufsize);
1045 }
1046
1047 progressmeter(-1);
1048
1049 switch (curtype) {
1050
1051 case TYPE_I:
1052 case TYPE_L:
1053 if (is_retr && restart_point &&
1054 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
1055 warn("local: %s", local);
1056 goto cleanuprecv;
1057 }
1058 if (rate_get) { /* rate limiting */
1059 while (1) {
1060 struct timeval then, now, td;
1061 off_t bufrem;
1062
1063 (void)gettimeofday(&then, NULL);
1064 errno = c = d = 0;
1065 for (bufrem = rate_get; bufrem > 0; ) {
1066 if ((c = read(fileno(din), buf,
1067 MIN(bufsize, bufrem))) <= 0)
1068 goto recvdone;
1069 bytes += c;
1070 bufrem -=c;
1071 if ((d = write(fileno(fout), buf, c))
1072 != c)
1073 goto recvdone;
1074 if (hash &&
1075 (!progress || filesize < 0)) {
1076 while (bytes >= hashbytes) {
1077 (void)putc('#', ttyout);
1078 hashbytes += mark;
1079 }
1080 (void)fflush(ttyout);
1081 }
1082 }
1083 /* sleep until time is up */
1084 while (1) {
1085 (void)gettimeofday(&now, NULL);
1086 timersub(&now, &then, &td);
1087 if (td.tv_sec > 0)
1088 break;
1089 usleep(1000000 - td.tv_usec);
1090 }
1091 }
1092 } else { /* faster code (no limiting) */
1093 while (1) {
1094 errno = c = d = 0;
1095 if ((c = read(fileno(din), buf, bufsize)) <= 0)
1096 goto recvdone;
1097 bytes += c;
1098 if ((d = write(fileno(fout), buf, c)) != c)
1099 goto recvdone;
1100 if (hash && (!progress || filesize < 0)) {
1101 while (bytes >= hashbytes) {
1102 (void)putc('#', ttyout);
1103 hashbytes += mark;
1104 }
1105 (void)fflush(ttyout);
1106 }
1107 }
1108 }
1109 recvdone:
1110 if (hash && (!progress || filesize < 0) && bytes > 0) {
1111 if (bytes < mark)
1112 (void)putc('#', ttyout);
1113 (void)putc('\n', ttyout);
1114 }
1115 if (c < 0) {
1116 if (errno != EPIPE)
1117 warn("netin");
1118 bytes = -1;
1119 }
1120 if (d < c) {
1121 if (d < 0)
1122 warn("local: %s", local);
1123 else
1124 warnx("%s: short write", local);
1125 }
1126 break;
1127
1128 case TYPE_A:
1129 if (is_retr && restart_point) {
1130 int ch;
1131 off_t i;
1132
1133 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1134 goto done;
1135 for (i = 0; i++ < restart_point;) {
1136 if ((ch = getc(fout)) == EOF)
1137 goto done;
1138 if (ch == '\n')
1139 i++;
1140 }
1141 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1142 done:
1143 warn("local: %s", local);
1144 goto cleanuprecv;
1145 }
1146 }
1147 while ((c = getc(din)) != EOF) {
1148 if (c == '\n')
1149 bare_lfs++;
1150 while (c == '\r') {
1151 while (hash && (!progress || filesize < 0) &&
1152 (bytes >= hashbytes)) {
1153 (void)putc('#', ttyout);
1154 (void)fflush(ttyout);
1155 hashbytes += mark;
1156 }
1157 bytes++;
1158 if ((c = getc(din)) != '\n' || tcrflag) {
1159 if (ferror(fout))
1160 goto break2;
1161 (void)putc('\r', fout);
1162 if (c == '\0') {
1163 bytes++;
1164 goto contin2;
1165 }
1166 if (c == EOF)
1167 goto contin2;
1168 }
1169 }
1170 (void)putc(c, fout);
1171 bytes++;
1172 contin2: ;
1173 }
1174 break2:
1175 if (hash && (!progress || filesize < 0)) {
1176 if (bytes < hashbytes)
1177 (void)putc('#', ttyout);
1178 (void)putc('\n', ttyout);
1179 }
1180 if (ferror(din)) {
1181 if (errno != EPIPE)
1182 warn("netin");
1183 bytes = -1;
1184 }
1185 if (ferror(fout))
1186 warn("local: %s", local);
1187 break;
1188 }
1189
1190 progressmeter(1);
1191 if (closefunc != NULL) {
1192 (*closefunc)(fout);
1193 fout = NULL;
1194 }
1195 (void)fclose(din);
1196 din = NULL;
1197 (void)getreply(0);
1198 if (bare_lfs) {
1199 fprintf(ttyout,
1200 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1201 bare_lfs);
1202 fputs("File may not have transferred correctly.\n", ttyout);
1203 }
1204 if (bytes >= 0 && is_retr) {
1205 if (bytes > 0)
1206 ptransfer(0);
1207 if (preserve && (closefunc == fclose)) {
1208 mtime = remotemodtime(remote, 0);
1209 if (mtime != -1) {
1210 (void)gettimeofday(&tval[0], NULL);
1211 tval[1].tv_sec = mtime;
1212 tval[1].tv_usec = 0;
1213 if (utimes(local, tval) == -1) {
1214 fprintf(ttyout,
1215 "Can't change modification time on %s to %s",
1216 local, asctime(localtime(&mtime)));
1217 }
1218 }
1219 }
1220 }
1221 goto cleanuprecv;
1222
1223 abort:
1224 /*
1225 * abort using RFC 959 recommended IP,SYNC sequence
1226 */
1227 if (! sigsetjmp(xferabort, 1)) {
1228 /* this is the first call */
1229 (void)xsignal(SIGINT, abort_squared);
1230 if (!cpend) {
1231 code = -1;
1232 goto cleanuprecv;
1233 }
1234 abort_remote(din);
1235 }
1236 code = -1;
1237 if (bytes > 0)
1238 ptransfer(0);
1239
1240 cleanuprecv:
1241 if (oldintr)
1242 (void)xsignal(SIGINT, oldintr);
1243 if (oldintp)
1244 (void)xsignal(SIGPIPE, oldintp);
1245 if (data >= 0) {
1246 (void)close(data);
1247 data = -1;
1248 }
1249 if (closefunc != NULL && fout != NULL)
1250 (*closefunc)(fout);
1251 if (din)
1252 (void)fclose(din);
1253 progress = oprogress;
1254 preserve = opreserve;
1255 bytes = 0;
1256 }
1257
1258 /*
1259 * Need to start a listen on the data channel before we send the command,
1260 * otherwise the server's connect may fail.
1261 */
1262 int
1263 initconn(void)
1264 {
1265 char *p, *a;
1266 int result, tmpno = 0;
1267 int on = 1;
1268 int error;
1269 u_int addr[16], port[2];
1270 u_int af, hal, pal;
1271 socklen_t len;
1272 char *pasvcmd = NULL;
1273
1274 #ifdef INET6
1275 if (myctladdr.su_family == AF_INET6 && debug &&
1276 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1277 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
1278 warnx("use of scoped address can be troublesome");
1279 }
1280 #endif
1281 reinit:
1282 if (passivemode) {
1283 data_addr = myctladdr;
1284 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1285 if (data < 0) {
1286 warn("socket");
1287 return (1);
1288 }
1289 if ((options & SO_DEBUG) &&
1290 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1291 (void *)&on, sizeof(on)) == -1) {
1292 if (debug)
1293 warn("setsockopt %s (ignored)", "SO_DEBUG");
1294 }
1295 result = COMPLETE + 1;
1296 switch (data_addr.su_family) {
1297 case AF_INET:
1298 if (epsv4 && !epsv4bad) {
1299 pasvcmd = "EPSV";
1300 result = command("EPSV");
1301 if (!connected)
1302 return (1);
1303 /*
1304 * this code is to be friendly with broken
1305 * BSDI ftpd
1306 */
1307 if (code / 10 == 22 && code != 229) {
1308 fputs(
1309 "wrong server: return code must be 229\n",
1310 ttyout);
1311 result = COMPLETE + 1;
1312 }
1313 if (result != COMPLETE) {
1314 epsv4bad = 1;
1315 if (debug)
1316 fputs(
1317 "disabling epsv4 for this connection\n",
1318 ttyout);
1319 }
1320 }
1321 if (result != COMPLETE) {
1322 pasvcmd = "PASV";
1323 result = command("PASV");
1324 if (!connected)
1325 return (1);
1326 }
1327 break;
1328 #ifdef INET6
1329 case AF_INET6:
1330 pasvcmd = "EPSV";
1331 result = command("EPSV");
1332 if (!connected)
1333 return (1);
1334 /* this code is to be friendly with broken BSDI ftpd */
1335 if (code / 10 == 22 && code != 229) {
1336 fputs(
1337 "wrong server: return code must be 229\n",
1338 ttyout);
1339 result = COMPLETE + 1;
1340 }
1341 if (result != COMPLETE) {
1342 pasvcmd = "LPSV";
1343 result = command("LPSV");
1344 }
1345 if (!connected)
1346 return (1);
1347 break;
1348 #endif
1349 default:
1350 result = COMPLETE + 1;
1351 break;
1352 }
1353 if (result != COMPLETE) {
1354 if (activefallback) {
1355 (void)close(data);
1356 data = -1;
1357 passivemode = 0;
1358 #if 0
1359 activefallback = 0;
1360 #endif
1361 goto reinit;
1362 }
1363 fputs("Passive mode refused.\n", ttyout);
1364 goto bad;
1365 }
1366
1367 #define pack2(var, off) \
1368 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1369 #define pack4(var, off) \
1370 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1371 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1372 #define UC(b) (((int)b)&0xff)
1373
1374 /*
1375 * What we've got at this point is a string of comma separated
1376 * one-byte unsigned integer values, separated by commas.
1377 */
1378 if (strcmp(pasvcmd, "PASV") == 0) {
1379 if (data_addr.su_family != AF_INET) {
1380 fputs(
1381 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1382 error = 1;
1383 goto bad;
1384 }
1385 if (code / 10 == 22 && code != 227) {
1386 fputs("wrong server: return code must be 227\n",
1387 ttyout);
1388 error = 1;
1389 goto bad;
1390 }
1391 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1392 &addr[0], &addr[1], &addr[2], &addr[3],
1393 &port[0], &port[1]);
1394 if (error != 6) {
1395 fputs(
1396 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1397 error = 1;
1398 goto bad;
1399 }
1400 error = 0;
1401 memset(&data_addr, 0, sizeof(data_addr));
1402 data_addr.su_family = AF_INET;
1403 data_addr.su_len = sizeof(struct sockaddr_in);
1404 data_addr.si_su.su_sin.sin_addr.s_addr =
1405 htonl(pack4(addr, 0));
1406 data_addr.su_port = htons(pack2(port, 0));
1407 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1408 if (code / 10 == 22 && code != 228) {
1409 fputs("wrong server: return code must be 228\n",
1410 ttyout);
1411 error = 1;
1412 goto bad;
1413 }
1414 switch (data_addr.su_family) {
1415 case AF_INET:
1416 error = sscanf(pasv,
1417 "%u,%u,%u,%u,%u,%u,%u,%u,%u",
1418 &af, &hal,
1419 &addr[0], &addr[1], &addr[2], &addr[3],
1420 &pal, &port[0], &port[1]);
1421 if (error != 9) {
1422 fputs(
1423 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1424 error = 1;
1425 goto bad;
1426 }
1427 if (af != 4 || hal != 4 || pal != 2) {
1428 fputs(
1429 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1430 error = 1;
1431 goto bad;
1432 }
1433
1434 error = 0;
1435 memset(&data_addr, 0, sizeof(data_addr));
1436 data_addr.su_family = AF_INET;
1437 data_addr.su_len = sizeof(struct sockaddr_in);
1438 data_addr.si_su.su_sin.sin_addr.s_addr =
1439 htonl(pack4(addr, 0));
1440 data_addr.su_port = htons(pack2(port, 0));
1441 break;
1442 #ifdef INET6
1443 case AF_INET6:
1444 error = sscanf(pasv,
1445 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1446 &af, &hal,
1447 &addr[0], &addr[1], &addr[2], &addr[3],
1448 &addr[4], &addr[5], &addr[6], &addr[7],
1449 &addr[8], &addr[9], &addr[10],
1450 &addr[11], &addr[12], &addr[13],
1451 &addr[14], &addr[15],
1452 &pal, &port[0], &port[1]);
1453 if (error != 21) {
1454 fputs(
1455 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1456 error = 1;
1457 goto bad;
1458 }
1459 if (af != 6 || hal != 16 || pal != 2) {
1460 fputs(
1461 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1462 error = 1;
1463 goto bad;
1464 }
1465
1466 error = 0;
1467 memset(&data_addr, 0, sizeof(data_addr));
1468 data_addr.su_family = AF_INET6;
1469 data_addr.su_len = sizeof(struct sockaddr_in6);
1470 {
1471 int i;
1472 for (i = 0; i < sizeof(struct in6_addr); i++) {
1473 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1474 UC(addr[i]);
1475 }
1476 }
1477 data_addr.su_port = htons(pack2(port, 0));
1478 break;
1479 #endif
1480 default:
1481 error = 1;
1482 }
1483 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1484 char delim[4];
1485
1486 port[0] = 0;
1487 if (code / 10 == 22 && code != 229) {
1488 fputs("wrong server: return code must be 229\n",
1489 ttyout);
1490 error = 1;
1491 goto bad;
1492 }
1493 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1494 &delim[1], &delim[2], &port[1],
1495 &delim[3]) != 5) {
1496 fputs("parse error!\n", ttyout);
1497 error = 1;
1498 goto bad;
1499 }
1500 if (delim[0] != delim[1] || delim[0] != delim[2]
1501 || delim[0] != delim[3]) {
1502 fputs("parse error!\n", ttyout);
1503 error = 1;
1504 goto bad;
1505 }
1506 data_addr = hisctladdr;
1507 data_addr.su_port = htons(port[1]);
1508 } else
1509 goto bad;
1510
1511 while (xconnect(data, (struct sockaddr *)&data_addr.si_su,
1512 data_addr.su_len) < 0) {
1513 if (activefallback) {
1514 (void)close(data);
1515 data = -1;
1516 passivemode = 0;
1517 #if 0
1518 activefallback = 0;
1519 #endif
1520 goto reinit;
1521 }
1522 warn("connect for data channel");
1523 goto bad;
1524 }
1525 #ifdef IPTOS_THROUGHPUT
1526 if (data_addr.su_family == AF_INET) {
1527 on = IPTOS_THROUGHPUT;
1528 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1529 (void *)&on, sizeof(on)) == -1) {
1530 if (debug)
1531 warn("setsockopt %s (ignored)",
1532 "IPTOS_THROUGHPUT");
1533 }
1534 }
1535 #endif
1536 return (0);
1537 }
1538
1539 noport:
1540 data_addr = myctladdr;
1541 if (sendport)
1542 data_addr.su_port = 0; /* let system pick one */
1543 if (data != -1)
1544 (void)close(data);
1545 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1546 if (data < 0) {
1547 warn("socket");
1548 if (tmpno)
1549 sendport = 1;
1550 return (1);
1551 }
1552 if (!sendport)
1553 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1554 (void *)&on, sizeof(on)) == -1) {
1555 warn("setsockopt %s", "SO_REUSEADDR");
1556 goto bad;
1557 }
1558 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1559 data_addr.su_len) < 0) {
1560 warn("bind");
1561 goto bad;
1562 }
1563 if ((options & SO_DEBUG) &&
1564 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1565 (void *)&on, sizeof(on)) == -1) {
1566 if (debug)
1567 warn("setsockopt %s (ignored)", "SO_DEBUG");
1568 }
1569 len = sizeof(data_addr.si_su);
1570 memset((char *)&data_addr, 0, sizeof (data_addr));
1571 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
1572 warn("getsockname");
1573 goto bad;
1574 }
1575 data_addr.su_len = len;
1576 if (xlisten(data, 1) < 0)
1577 warn("listen");
1578
1579 if (sendport) {
1580 char hname[NI_MAXHOST], sname[NI_MAXSERV];
1581 int af;
1582 struct sockinet tmp;
1583
1584 switch (data_addr.su_family) {
1585 case AF_INET:
1586 if (!epsv4 || epsv4bad) {
1587 result = COMPLETE + 1;
1588 break;
1589 }
1590 /* FALLTHROUGH */
1591 #ifdef INET6
1592 case AF_INET6:
1593 #endif
1594 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1595 tmp = data_addr;
1596 #ifdef INET6
1597 if (tmp.su_family == AF_INET6)
1598 tmp.si_su.su_sin6.sin6_scope_id = 0;
1599 #endif
1600 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1601 tmp.su_len, hname, sizeof(hname), sname,
1602 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1603 result = ERROR;
1604 } else {
1605 result = command("EPRT |%d|%s|%s|", af, hname,
1606 sname);
1607 if (!connected)
1608 return (1);
1609 if (result != COMPLETE) {
1610 epsv4bad = 1;
1611 if (debug)
1612 fputs(
1613 "disabling epsv4 for this connection\n",
1614 ttyout);
1615 }
1616 }
1617 break;
1618 default:
1619 result = COMPLETE + 1;
1620 break;
1621 }
1622 if (result == COMPLETE)
1623 goto skip_port;
1624
1625 switch (data_addr.su_family) {
1626 case AF_INET:
1627 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1628 p = (char *)&data_addr.su_port;
1629 result = command("PORT %d,%d,%d,%d,%d,%d",
1630 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1631 UC(p[0]), UC(p[1]));
1632 break;
1633 #ifdef INET6
1634 case AF_INET6:
1635 a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
1636 p = (char *)&data_addr.su_port;
1637 result = command(
1638 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1639 6, 16,
1640 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
1641 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
1642 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
1643 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
1644 2, UC(p[0]), UC(p[1]));
1645 break;
1646 #endif
1647 default:
1648 result = COMPLETE + 1; /* xxx */
1649 }
1650 if (!connected)
1651 return (1);
1652 skip_port:
1653
1654 if (result == ERROR && sendport == -1) {
1655 sendport = 0;
1656 tmpno = 1;
1657 goto noport;
1658 }
1659 return (result != COMPLETE);
1660 }
1661 if (tmpno)
1662 sendport = 1;
1663 #ifdef IPTOS_THROUGHPUT
1664 if (data_addr.su_family == AF_INET) {
1665 on = IPTOS_THROUGHPUT;
1666 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1667 (void *)&on, sizeof(on)) == -1)
1668 if (debug)
1669 warn("setsockopt %s (ignored)",
1670 "IPTOS_THROUGHPUT");
1671 }
1672 #endif
1673 return (0);
1674 bad:
1675 (void)close(data);
1676 data = -1;
1677 if (tmpno)
1678 sendport = 1;
1679 return (1);
1680 }
1681
1682 FILE *
1683 dataconn(const char *lmode)
1684 {
1685 struct sockinet from;
1686 int s, flags, rv, timeout;
1687 struct timeval endtime, now, td;
1688 struct pollfd pfd[1];
1689 socklen_t fromlen;
1690
1691 if (passivemode) /* passive data connection */
1692 return (fdopen(data, lmode));
1693
1694 /* active mode data connection */
1695
1696 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1697 goto dataconn_failed; /* get current socket flags */
1698 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1699 goto dataconn_failed; /* set non-blocking connect */
1700
1701 /* NOTE: we now must restore socket flags on successful exit */
1702
1703 /* limit time waiting on listening socket */
1704 pfd[0].fd = data;
1705 pfd[0].events = POLLIN;
1706 (void)gettimeofday(&endtime, NULL); /* determine end time */
1707 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1708 /* without -q, default to 60s */
1709 do {
1710 (void)gettimeofday(&now, NULL);
1711 timersub(&endtime, &now, &td);
1712 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1713 if (timeout < 0)
1714 timeout = 0;
1715 rv = xpoll(pfd, 1, timeout);
1716 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1717 if (rv == -1) {
1718 warn("poll waiting before accept");
1719 goto dataconn_failed;
1720 }
1721 if (rv == 0) {
1722 warn("poll timeout waiting before accept");
1723 goto dataconn_failed;
1724 }
1725
1726 /* (non-blocking) accept the connection */
1727 fromlen = myctladdr.su_len;
1728 do {
1729 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1730 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1731 if (s == -1) {
1732 warn("accept");
1733 goto dataconn_failed;
1734 }
1735
1736 (void)close(data);
1737 data = s;
1738 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1739 goto dataconn_failed;
1740
1741 #ifdef IPTOS_THROUGHPUT
1742 if (from.su_family == AF_INET) {
1743 int tos = IPTOS_THROUGHPUT;
1744 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1745 (void *)&tos, sizeof(tos)) == -1) {
1746 if (debug)
1747 warn("setsockopt %s (ignored)",
1748 "IPTOS_THROUGHPUT");
1749 }
1750 }
1751 #endif
1752 return (fdopen(data, lmode));
1753
1754 dataconn_failed:
1755 (void)close(data);
1756 data = -1;
1757 return (NULL);
1758 }
1759
1760 void
1761 psabort(int notused)
1762 {
1763 int oerrno = errno;
1764
1765 sigint_raised = 1;
1766 alarmtimer(0);
1767 abrtflag++;
1768 errno = oerrno;
1769 }
1770
1771 void
1772 pswitch(int flag)
1773 {
1774 sigfunc oldintr;
1775 static struct comvars {
1776 int connect;
1777 char name[MAXHOSTNAMELEN];
1778 struct sockinet mctl;
1779 struct sockinet hctl;
1780 FILE *in;
1781 FILE *out;
1782 int tpe;
1783 int curtpe;
1784 int cpnd;
1785 int sunqe;
1786 int runqe;
1787 int mcse;
1788 int ntflg;
1789 char nti[17];
1790 char nto[17];
1791 int mapflg;
1792 char mi[MAXPATHLEN];
1793 char mo[MAXPATHLEN];
1794 } proxstruct, tmpstruct;
1795 struct comvars *ip, *op;
1796
1797 abrtflag = 0;
1798 oldintr = xsignal(SIGINT, psabort);
1799 if (flag) {
1800 if (proxy)
1801 return;
1802 ip = &tmpstruct;
1803 op = &proxstruct;
1804 proxy++;
1805 } else {
1806 if (!proxy)
1807 return;
1808 ip = &proxstruct;
1809 op = &tmpstruct;
1810 proxy = 0;
1811 }
1812 ip->connect = connected;
1813 connected = op->connect;
1814 if (hostname)
1815 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1816 else
1817 ip->name[0] = '\0';
1818 hostname = op->name;
1819 ip->hctl = hisctladdr;
1820 hisctladdr = op->hctl;
1821 ip->mctl = myctladdr;
1822 myctladdr = op->mctl;
1823 ip->in = cin;
1824 cin = op->in;
1825 ip->out = cout;
1826 cout = op->out;
1827 ip->tpe = type;
1828 type = op->tpe;
1829 ip->curtpe = curtype;
1830 curtype = op->curtpe;
1831 ip->cpnd = cpend;
1832 cpend = op->cpnd;
1833 ip->sunqe = sunique;
1834 sunique = op->sunqe;
1835 ip->runqe = runique;
1836 runique = op->runqe;
1837 ip->mcse = mcase;
1838 mcase = op->mcse;
1839 ip->ntflg = ntflag;
1840 ntflag = op->ntflg;
1841 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1842 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1843 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1844 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1845 ip->mapflg = mapflag;
1846 mapflag = op->mapflg;
1847 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1848 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1849 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1850 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1851 (void)xsignal(SIGINT, oldintr);
1852 if (abrtflag) {
1853 abrtflag = 0;
1854 (*oldintr)(SIGINT);
1855 }
1856 }
1857
1858 void
1859 abortpt(int notused)
1860 {
1861
1862 sigint_raised = 1;
1863 alarmtimer(0);
1864 if (fromatty)
1865 write(fileno(ttyout), "\n", 1);
1866 ptabflg++;
1867 mflag = 0;
1868 abrtflag = 0;
1869 siglongjmp(ptabort, 1);
1870 }
1871
1872 void
1873 proxtrans(const char *cmd, const char *local, const char *remote)
1874 {
1875 sigfunc oldintr;
1876 int prox_type, nfnd;
1877 volatile int secndflag;
1878 char *cmd2;
1879
1880 #ifdef __GNUC__ /* to shut up gcc warnings */
1881 (void)&oldintr;
1882 (void)&cmd2;
1883 #endif
1884
1885 oldintr = NULL;
1886 secndflag = 0;
1887 if (strcmp(cmd, "RETR"))
1888 cmd2 = "RETR";
1889 else
1890 cmd2 = runique ? "STOU" : "STOR";
1891 if ((prox_type = type) == 0) {
1892 if (unix_server && unix_proxy)
1893 prox_type = TYPE_I;
1894 else
1895 prox_type = TYPE_A;
1896 }
1897 if (curtype != prox_type)
1898 changetype(prox_type, 1);
1899 if (command("PASV") != COMPLETE) {
1900 fputs("proxy server does not support third party transfers.\n",
1901 ttyout);
1902 return;
1903 }
1904 pswitch(0);
1905 if (!connected) {
1906 fputs("No primary connection.\n", ttyout);
1907 pswitch(1);
1908 code = -1;
1909 return;
1910 }
1911 if (curtype != prox_type)
1912 changetype(prox_type, 1);
1913 if (command("PORT %s", pasv) != COMPLETE) {
1914 pswitch(1);
1915 return;
1916 }
1917 if (sigsetjmp(ptabort, 1))
1918 goto abort;
1919 oldintr = xsignal(SIGINT, abortpt);
1920 if ((restart_point &&
1921 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1922 || (command("%s %s", cmd, remote) != PRELIM)) {
1923 (void)xsignal(SIGINT, oldintr);
1924 pswitch(1);
1925 return;
1926 }
1927 sleep(2);
1928 pswitch(1);
1929 secndflag++;
1930 if ((restart_point &&
1931 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1932 || (command("%s %s", cmd2, local) != PRELIM))
1933 goto abort;
1934 ptflag++;
1935 (void)getreply(0);
1936 pswitch(0);
1937 (void)getreply(0);
1938 (void)xsignal(SIGINT, oldintr);
1939 pswitch(1);
1940 ptflag = 0;
1941 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1942 return;
1943 abort:
1944 if (sigsetjmp(xferabort, 1)) {
1945 (void)xsignal(SIGINT, oldintr);
1946 return;
1947 }
1948 (void)xsignal(SIGINT, abort_squared);
1949 ptflag = 0;
1950 if (strcmp(cmd, "RETR") && !proxy)
1951 pswitch(1);
1952 else if (!strcmp(cmd, "RETR") && proxy)
1953 pswitch(0);
1954 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1955 if (command("%s %s", cmd2, local) != PRELIM) {
1956 pswitch(0);
1957 if (cpend)
1958 abort_remote(NULL);
1959 }
1960 pswitch(1);
1961 if (ptabflg)
1962 code = -1;
1963 (void)xsignal(SIGINT, oldintr);
1964 return;
1965 }
1966 if (cpend)
1967 abort_remote(NULL);
1968 pswitch(!proxy);
1969 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1970 if (command("%s %s", cmd2, local) != PRELIM) {
1971 pswitch(0);
1972 if (cpend)
1973 abort_remote(NULL);
1974 pswitch(1);
1975 if (ptabflg)
1976 code = -1;
1977 (void)xsignal(SIGINT, oldintr);
1978 return;
1979 }
1980 }
1981 if (cpend)
1982 abort_remote(NULL);
1983 pswitch(!proxy);
1984 if (cpend) {
1985 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1986 if (nfnd < 0)
1987 warn("abort");
1988 if (ptabflg)
1989 code = -1;
1990 lostpeer(0);
1991 }
1992 (void)getreply(0);
1993 (void)getreply(0);
1994 }
1995 if (proxy)
1996 pswitch(0);
1997 pswitch(1);
1998 if (ptabflg)
1999 code = -1;
2000 (void)xsignal(SIGINT, oldintr);
2001 }
2002
2003 void
2004 reset(int argc, char *argv[])
2005 {
2006 int nfnd = 1;
2007
2008 if (argc == 0 && argv != NULL) {
2009 fprintf(ttyout, "usage: %s\n", argv[0]);
2010 code = -1;
2011 return;
2012 }
2013 while (nfnd > 0) {
2014 if ((nfnd = empty(cin, NULL, 0)) < 0) {
2015 warn("reset");
2016 code = -1;
2017 lostpeer(0);
2018 } else if (nfnd)
2019 (void)getreply(0);
2020 }
2021 }
2022
2023 char *
2024 gunique(const char *local)
2025 {
2026 static char new[MAXPATHLEN];
2027 char *cp = strrchr(local, '/');
2028 int d, count=0, len;
2029 char ext = '1';
2030
2031 if (cp)
2032 *cp = '\0';
2033 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
2034 if (cp)
2035 *cp = '/';
2036 if (d < 0) {
2037 warn("local: %s", local);
2038 return (NULL);
2039 }
2040 len = strlcpy(new, local, sizeof(new));
2041 cp = &new[len];
2042 *cp++ = '.';
2043 while (!d) {
2044 if (++count == 100) {
2045 fputs("runique: can't find unique file name.\n",
2046 ttyout);
2047 return (NULL);
2048 }
2049 *cp++ = ext;
2050 *cp = '\0';
2051 if (ext == '9')
2052 ext = '0';
2053 else
2054 ext++;
2055 if ((d = access(new, F_OK)) < 0)
2056 break;
2057 if (ext != '0')
2058 cp--;
2059 else if (*(cp - 2) == '.')
2060 *(cp - 1) = '1';
2061 else {
2062 *(cp - 2) = *(cp - 2) + 1;
2063 cp--;
2064 }
2065 }
2066 return (new);
2067 }
2068
2069 /*
2070 * abort_squared --
2071 * aborts abort_remote(). lostpeer() is called because if the user is
2072 * too impatient to wait or there's another problem then ftp really
2073 * needs to get back to a known state.
2074 */
2075 void
2076 abort_squared(int dummy)
2077 {
2078 char msgbuf[100];
2079 size_t len;
2080
2081 sigint_raised = 1;
2082 alarmtimer(0);
2083 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2084 sizeof(msgbuf));
2085 write(fileno(ttyout), msgbuf, len);
2086 lostpeer(0);
2087 siglongjmp(xferabort, 1);
2088 }
2089
2090 void
2091 abort_remote(FILE *din)
2092 {
2093 char buf[BUFSIZ];
2094 int nfnd;
2095
2096 if (cout == NULL) {
2097 warnx("Lost control connection for abort.");
2098 if (ptabflg)
2099 code = -1;
2100 lostpeer(0);
2101 return;
2102 }
2103 /*
2104 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2105 * after urgent byte rather than before as is protocol now
2106 */
2107 buf[0] = IAC;
2108 buf[1] = IP;
2109 buf[2] = IAC;
2110 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
2111 warn("abort");
2112 fprintf(cout, "%cABOR\r\n", DM);
2113 (void)fflush(cout);
2114 if ((nfnd = empty(cin, din, 10)) <= 0) {
2115 if (nfnd < 0)
2116 warn("abort");
2117 if (ptabflg)
2118 code = -1;
2119 lostpeer(0);
2120 }
2121 if (din && (nfnd & 2)) {
2122 while (read(fileno(din), buf, BUFSIZ) > 0)
2123 continue;
2124 }
2125 if (getreply(0) == ERROR && code == 552) {
2126 /* 552 needed for nic style abort */
2127 (void)getreply(0);
2128 }
2129 (void)getreply(0);
2130 }
2131
2132 void
2133 ai_unmapped(struct addrinfo *ai)
2134 {
2135 #ifdef INET6
2136 struct sockaddr_in6 *sin6;
2137 struct sockaddr_in sin;
2138 socklen_t len;
2139
2140 if (ai->ai_family != AF_INET6)
2141 return;
2142 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2143 sizeof(sin) > ai->ai_addrlen)
2144 return;
2145 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2146 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2147 return;
2148
2149 memset(&sin, 0, sizeof(sin));
2150 sin.sin_family = AF_INET;
2151 len = sizeof(struct sockaddr_in);
2152 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2153 sizeof(sin.sin_addr));
2154 sin.sin_port = sin6->sin6_port;
2155
2156 ai->ai_family = AF_INET;
2157 #if HAVE_SOCKADDR_SA_LEN
2158 sin.sin_len = len;
2159 #endif
2160 memcpy(ai->ai_addr, &sin, len);
2161 ai->ai_addrlen = len;
2162 #endif
2163 }
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