Merge branch 'vendor/MDOCML'
[dragonfly.git] / contrib / tnftp / ftp.c
CommitLineData
d2b51479 1/* $NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp $ */
eedc536d
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2
3/*-
20e59a13 4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
eedc536d
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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.
eedc536d
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18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (c) 1985, 1989, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 */
60
61/*
62 * Copyright (C) 1997 and 1998 WIDE Project.
63 * All rights reserved.
64 *
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
67 * are met:
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
73 * 3. Neither the name of the project nor the names of its contributors
74 * may be used to endorse or promote products derived from this software
75 * without specific prior written permission.
76 *
77 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
80 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
87 * SUCH DAMAGE.
88 */
89
90#include <sys/cdefs.h>
91#ifndef lint
92#if 0
93static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
94#else
d2b51479 95__RCSID("$NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp $");
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96#endif
97#endif /* not lint */
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/in_systm.h>
106#include <netinet/ip.h>
107#include <arpa/inet.h>
108#include <arpa/ftp.h>
109#include <arpa/telnet.h>
110
c81ae005 111#include <assert.h>
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112#include <ctype.h>
113#include <err.h>
114#include <errno.h>
115#include <fcntl.h>
116#include <netdb.h>
117#include <stdio.h>
118#include <stdlib.h>
119#include <string.h>
120#include <time.h>
121#include <unistd.h>
122#include <stdarg.h>
123
124#include "ftp_var.h"
125
126volatile sig_atomic_t abrtflag;
127volatile sig_atomic_t timeoutflag;
128
129sigjmp_buf ptabort;
130int ptabflg;
131int ptflag = 0;
132char pasv[BUFSIZ]; /* passive port for proxy data connection */
133
134static int empty(FILE *, FILE *, int);
c81ae005 135__dead static void abort_squared(int);
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136
137struct sockinet {
138 union sockunion {
139 struct sockaddr_in su_sin;
140#ifdef INET6
141 struct sockaddr_in6 su_sin6;
142#endif
143 } si_su;
3b706bf0 144#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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145 int si_len;
146#endif
147};
148
3b706bf0 149#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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150# define su_len si_len
151#else
152# define su_len si_su.su_sin.sin_len
153#endif
154#define su_family si_su.su_sin.sin_family
155#define su_port si_su.su_sin.sin_port
156
157struct sockinet myctladdr, hisctladdr, data_addr;
158
159char *
20e59a13 160hookup(const char *host, const char *port)
eedc536d 161{
fa70ef36 162 int s = -1, error;
eedc536d 163 struct addrinfo hints, *res, *res0;
eedc536d 164 static char hostnamebuf[MAXHOSTNAMELEN];
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165 socklen_t len;
166 int on = 1;
167
168 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
169 memset((char *)&myctladdr, 0, sizeof (myctladdr));
170 memset(&hints, 0, sizeof(hints));
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171 hints.ai_flags = AI_CANONNAME;
172 hints.ai_family = family;
173 hints.ai_socktype = SOCK_STREAM;
174 hints.ai_protocol = 0;
fa70ef36 175 error = getaddrinfo(host, port, &hints, &res0);
eedc536d 176 if (error) {
fa70ef36 177 warnx("Can't lookup `%s:%s': %s", host, port,
0511850f
PA
178 (error == EAI_SYSTEM) ? strerror(errno)
179 : gai_strerror(error));
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180 code = -1;
181 return (0);
182 }
183
184 if (res0->ai_canonname)
185 (void)strlcpy(hostnamebuf, res0->ai_canonname,
186 sizeof(hostnamebuf));
187 else
188 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
189 hostname = hostnamebuf;
190
191 for (res = res0; res; res = res->ai_next) {
fa70ef36
PA
192 char hname[NI_MAXHOST], sname[NI_MAXSERV];
193
eedc536d 194 ai_unmapped(res);
0511850f 195 if (getnameinfo(res->ai_addr, res->ai_addrlen,
fa70ef36
PA
196 hname, sizeof(hname), sname, sizeof(sname),
197 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
198 strlcpy(hname, "?", sizeof(hname));
199 strlcpy(sname, "?", sizeof(sname));
200 }
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201 if (verbose && res0->ai_next) {
202 /* if we have multiple possibilities */
fa70ef36 203 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
eedc536d 204 }
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205 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
206 if (s < 0) {
fa70ef36
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207 warn("Can't create socket for connection to `%s:%s'",
208 hname, sname);
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209 continue;
210 }
d2b51479
PA
211 if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
212 verbose || !res->ai_next) < 0) {
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213 close(s);
214 s = -1;
215 continue;
216 }
217
218 /* finally we got one */
219 break;
220 }
221 if (s < 0) {
fa70ef36 222 warnx("Can't connect to `%s:%s'", host, port);
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223 code = -1;
224 freeaddrinfo(res0);
225 return 0;
226 }
227 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
228 hisctladdr.su_len = res->ai_addrlen;
229 freeaddrinfo(res0);
230 res0 = res = NULL;
231
232 len = hisctladdr.su_len;
233 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
fa70ef36
PA
234 warn("Can't determine my address of connection to `%s:%s'",
235 host, port);
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236 code = -1;
237 goto bad;
238 }
239 myctladdr.su_len = len;
240
241#ifdef IPTOS_LOWDELAY
242 if (hisctladdr.su_family == AF_INET) {
243 int tos = IPTOS_LOWDELAY;
244 if (setsockopt(s, IPPROTO_IP, IP_TOS,
245 (void *)&tos, sizeof(tos)) == -1) {
246 DWARN("setsockopt %s (ignored)",
247 "IPTOS_LOWDELAY");
248 }
249 }
250#endif
251 cin = fdopen(s, "r");
252 cout = fdopen(s, "w");
253 if (cin == NULL || cout == NULL) {
0511850f 254 warnx("Can't fdopen socket");
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255 if (cin)
256 (void)fclose(cin);
257 if (cout)
258 (void)fclose(cout);
259 code = -1;
260 goto bad;
261 }
262 if (verbose)
263 fprintf(ttyout, "Connected to %s.\n", hostname);
264 if (getreply(0) > 2) { /* read startup message from server */
265 if (cin)
266 (void)fclose(cin);
267 if (cout)
268 (void)fclose(cout);
269 code = -1;
270 goto bad;
271 }
272
273 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
274 (void *)&on, sizeof(on)) == -1) {
275 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
276 }
277
278 return (hostname);
279 bad:
280 (void)close(s);
281 return (NULL);
282}
283
284void
285cmdabort(int notused)
286{
287 int oerrno = errno;
288
289 sigint_raised = 1;
290 alarmtimer(0);
291 if (fromatty)
292 write(fileno(ttyout), "\n", 1);
293 abrtflag++;
294 if (ptflag)
295 siglongjmp(ptabort, 1);
296 errno = oerrno;
297}
298
299void
300cmdtimeout(int notused)
301{
302 int oerrno = errno;
303
304 alarmtimer(0);
305 if (fromatty)
306 write(fileno(ttyout), "\n", 1);
307 timeoutflag++;
308 if (ptflag)
309 siglongjmp(ptabort, 1);
310 errno = oerrno;
311}
312
313/*VARARGS*/
314int
315command(const char *fmt, ...)
316{
317 va_list ap;
318 int r;
319 sigfunc oldsigint;
320
321#ifndef NO_DEBUG
322 if (ftp_debug) {
323 fputs("---> ", ttyout);
324 va_start(ap, fmt);
325 if (strncmp("PASS ", fmt, 5) == 0)
326 fputs("PASS XXXX", ttyout);
327 else if (strncmp("ACCT ", fmt, 5) == 0)
328 fputs("ACCT XXXX", ttyout);
329 else
330 vfprintf(ttyout, fmt, ap);
331 va_end(ap);
332 putc('\n', ttyout);
333 }
334#endif
335 if (cout == NULL) {
0511850f 336 warnx("No control connection for command");
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337 code = -1;
338 return (0);
339 }
340
341 abrtflag = 0;
342
343 oldsigint = xsignal(SIGINT, cmdabort);
344
345 va_start(ap, fmt);
346 vfprintf(cout, fmt, ap);
347 va_end(ap);
348 fputs("\r\n", cout);
349 (void)fflush(cout);
350 cpend = 1;
351 r = getreply(!strcmp(fmt, "QUIT"));
352 if (abrtflag && oldsigint != SIG_IGN)
353 (*oldsigint)(SIGINT);
354 (void)xsignal(SIGINT, oldsigint);
355 return (r);
356}
357
358static const char *m421[] = {
359 "remote server timed out. Connection closed",
360 "user interrupt. Connection closed",
361 "remote server has closed connection",
362};
363
364int
365getreply(int expecteof)
366{
367 char current_line[BUFSIZ]; /* last line of previous reply */
20e59a13 368 int c, n, lineno;
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369 int dig;
370 int originalcode = 0, continuation = 0;
371 sigfunc oldsigint, oldsigalrm;
372 int pflag = 0;
373 char *cp, *pt = pasv;
374
375 abrtflag = 0;
376 timeoutflag = 0;
377
378 oldsigint = xsignal(SIGINT, cmdabort);
379 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
380
20e59a13 381 for (lineno = 0 ;; lineno++) {
eedc536d
PA
382 dig = n = code = 0;
383 cp = current_line;
384 while (alarmtimer(quit_time ? quit_time : 60),
385 ((c = getc(cin)) != '\n')) {
386 if (c == IAC) { /* handle telnet commands */
387 switch (c = getc(cin)) {
388 case WILL:
389 case WONT:
390 c = getc(cin);
391 fprintf(cout, "%c%c%c", IAC, DONT, c);
392 (void)fflush(cout);
393 break;
394 case DO:
395 case DONT:
396 c = getc(cin);
397 fprintf(cout, "%c%c%c", IAC, WONT, c);
398 (void)fflush(cout);
399 break;
400 default:
401 break;
402 }
403 continue;
404 }
405 dig++;
406 if (c == EOF) {
407 /*
408 * these will get trashed by pswitch()
409 * in lostpeer()
410 */
411 int reply_timeoutflag = timeoutflag;
412 int reply_abrtflag = abrtflag;
413
414 alarmtimer(0);
415 if (expecteof && feof(cin)) {
416 (void)xsignal(SIGINT, oldsigint);
417 (void)xsignal(SIGALRM, oldsigalrm);
418 code = 221;
419 return (0);
420 }
421 cpend = 0;
422 lostpeer(0);
423 if (verbose) {
424 size_t midx;
425 if (reply_timeoutflag)
426 midx = 0;
427 else if (reply_abrtflag)
428 midx = 1;
429 else
430 midx = 2;
0511850f 431 (void)fprintf(ttyout,
eedc536d
PA
432 "421 Service not available, %s.\n", m421[midx]);
433 (void)fflush(ttyout);
434 }
435 code = 421;
436 (void)xsignal(SIGINT, oldsigint);
437 (void)xsignal(SIGALRM, oldsigalrm);
438 return (4);
439 }
440 if (c != '\r' && (verbose > 0 ||
441 ((verbose > -1 && n == '5' && dig > 4) &&
442 (((!n && c < '5') || (n && n < '5'))
443 || !retry_connect)))) {
444 if (proxflag &&
445 (dig == 1 || (dig == 5 && verbose == 0)))
446 fprintf(ttyout, "%s:", hostname);
447 (void)putc(c, ttyout);
448 }
449 if (dig < 4 && isdigit(c))
450 code = code * 10 + (c - '0');
451 if (!pflag && (code == 227 || code == 228))
452 pflag = 1;
453 else if (!pflag && code == 229)
454 pflag = 100;
455 if (dig > 4 && pflag == 1 && isdigit(c))
456 pflag = 2;
457 if (pflag == 2) {
458 if (c != '\r' && c != ')') {
459 if (pt < &pasv[sizeof(pasv) - 1])
460 *pt++ = c;
461 } else {
462 *pt = '\0';
463 pflag = 3;
464 }
465 }
466 if (pflag == 100 && c == '(')
467 pflag = 2;
468 if (dig == 4 && c == '-') {
469 if (continuation)
470 code = 0;
471 continuation++;
472 }
473 if (n == 0)
474 n = c;
475 if (cp < &current_line[sizeof(current_line) - 1])
476 *cp++ = c;
477 }
478 if (verbose > 0 || ((verbose > -1 && n == '5') &&
479 (n < '5' || !retry_connect))) {
480 (void)putc(c, ttyout);
0511850f 481 (void)fflush(ttyout);
eedc536d
PA
482 }
483 if (cp[-1] == '\r')
484 cp[-1] = '\0';
485 *cp = '\0';
20e59a13 486 if (lineno == 0)
eedc536d
PA
487 (void)strlcpy(reply_string, current_line,
488 sizeof(reply_string));
20e59a13 489 if (lineno > 0 && code == 0 && reply_callback != NULL)
eedc536d
PA
490 (*reply_callback)(current_line);
491 if (continuation && code != originalcode) {
492 if (originalcode == 0)
493 originalcode = code;
494 continue;
495 }
496 if (n != '1')
497 cpend = 0;
498 alarmtimer(0);
499 (void)xsignal(SIGINT, oldsigint);
500 (void)xsignal(SIGALRM, oldsigalrm);
501 if (code == 421 || originalcode == 421)
502 lostpeer(0);
503 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
504 (*oldsigint)(SIGINT);
505 if (timeoutflag && oldsigalrm != cmdtimeout &&
506 oldsigalrm != SIG_IGN)
507 (*oldsigalrm)(SIGINT);
508 return (n - '0');
509 }
510}
511
512static int
20e59a13 513empty(FILE *ecin, FILE *din, int sec)
eedc536d
PA
514{
515 int nr, nfd;
516 struct pollfd pfd[2];
517
518 nfd = 0;
20e59a13
PA
519 if (ecin) {
520 pfd[nfd].fd = fileno(ecin);
eedc536d
PA
521 pfd[nfd++].events = POLLIN;
522 }
523
524 if (din) {
525 pfd[nfd].fd = fileno(din);
526 pfd[nfd++].events = POLLIN;
527 }
528
529 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
530 return nr;
531
532 nr = 0;
533 nfd = 0;
20e59a13 534 if (ecin)
eedc536d
PA
535 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
536 if (din)
537 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
538 return nr;
539}
540
541sigjmp_buf xferabort;
542
c81ae005 543__dead static void
eedc536d
PA
544abortxfer(int notused)
545{
546 char msgbuf[100];
547 size_t len;
548
549 sigint_raised = 1;
550 alarmtimer(0);
551 mflag = 0;
552 abrtflag = 0;
553 switch (direction[0]) {
554 case 'r':
555 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
556 break;
557 case 's':
558 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
559 break;
560 default:
0511850f 561 errx(1, "abortxfer: unknown direction `%s'", direction);
eedc536d
PA
562 }
563 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
564 sizeof(msgbuf));
565 write(fileno(ttyout), msgbuf, len);
566 siglongjmp(xferabort, 1);
567}
568
c106ca54
PA
569/*
570 * Read data from infd & write to outfd, using buf/bufsize as the temporary
571 * buffer, dealing with short writes.
572 * If rate_limit != 0, rate-limit the transfer.
573 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
574 * Updates global variables: bytes.
575 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
576 * In the case of error, errno contains the appropriate error code.
577 */
578static int
579copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
580 int rate_limit, int hash_interval)
581{
582 volatile off_t hashc;
583 ssize_t inc, outc;
584 char *bufp;
585 struct timeval tvthen, tvnow, tvdiff;
586 off_t bufrem, bufchunk;
587 int serr;
588
589 hashc = hash_interval;
590 if (rate_limit)
591 bufchunk = rate_limit;
592 else
593 bufchunk = bufsize;
594
595 while (1) {
596 if (rate_limit) {
597 (void)gettimeofday(&tvthen, NULL);
598 }
599 errno = 0;
600 inc = outc = 0;
601 /* copy bufchunk at a time */
602 bufrem = bufchunk;
603 while (bufrem > 0) {
20e59a13 604 inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
c106ca54
PA
605 if (inc <= 0)
606 goto copy_done;
607 bytes += inc;
608 bufrem -= inc;
609 bufp = buf;
610 while (inc > 0) {
611 outc = write(outfd, bufp, inc);
612 if (outc < 0)
613 goto copy_done;
614 inc -= outc;
615 bufp += outc;
616 }
617 if (hash_interval) {
618 while (bytes >= hashc) {
619 (void)putc('#', ttyout);
620 hashc += hash_interval;
621 }
622 (void)fflush(ttyout);
623 }
624 }
625 if (rate_limit) { /* rate limited; wait if necessary */
626 while (1) {
627 (void)gettimeofday(&tvnow, NULL);
628 timersub(&tvnow, &tvthen, &tvdiff);
629 if (tvdiff.tv_sec > 0)
630 break;
631 usleep(1000000 - tvdiff.tv_usec);
632 }
633 }
634 }
635
636 copy_done:
637 serr = errno;
638 if (hash_interval && bytes > 0) {
639 if (bytes < hash_interval)
640 (void)putc('#', ttyout);
641 (void)putc('\n', ttyout);
642 (void)fflush(ttyout);
643 }
644 errno = serr;
645 if (inc == -1)
646 return 1;
647 if (outc == -1)
648 return 2;
649
650 return 0;
651}
652
eedc536d
PA
653void
654sendrequest(const char *cmd, const char *local, const char *remote,
655 int printnames)
656{
657 struct stat st;
c106ca54 658 int c;
0511850f
PA
659 FILE *volatile fin;
660 FILE *volatile dout;
661 int (*volatile closefunc)(FILE *);
662 sigfunc volatile oldintr;
663 sigfunc volatile oldintp;
664 off_t volatile hashbytes;
c106ca54 665 int hash_interval;
20e59a13 666 const char *lmode;
eedc536d
PA
667 static size_t bufsize;
668 static char *buf;
669 int oprogress;
670
eedc536d
PA
671 hashbytes = mark;
672 direction = "sent";
673 dout = NULL;
674 bytes = 0;
675 filesize = -1;
676 oprogress = progress;
677 if (verbose && printnames) {
678 if (*local != '-')
679 fprintf(ttyout, "local: %s ", local);
680 if (remote)
681 fprintf(ttyout, "remote: %s\n", remote);
682 }
683 if (proxy) {
684 proxtrans(cmd, local, remote);
685 return;
686 }
687 if (curtype != type)
688 changetype(type, 0);
689 closefunc = NULL;
690 oldintr = NULL;
691 oldintp = NULL;
692 lmode = "w";
693 if (sigsetjmp(xferabort, 1)) {
694 while (cpend)
695 (void)getreply(0);
696 code = -1;
697 goto cleanupsend;
698 }
699 (void)xsignal(SIGQUIT, psummary);
700 oldintr = xsignal(SIGINT, abortxfer);
701 if (strcmp(local, "-") == 0) {
702 fin = stdin;
703 progress = 0;
704 } else if (*local == '|') {
705 oldintp = xsignal(SIGPIPE, SIG_IGN);
706 fin = popen(local + 1, "r");
707 if (fin == NULL) {
0511850f 708 warn("Can't execute `%s'", local + 1);
eedc536d
PA
709 code = -1;
710 goto cleanupsend;
711 }
712 progress = 0;
713 closefunc = pclose;
714 } else {
715 fin = fopen(local, "r");
716 if (fin == NULL) {
0511850f 717 warn("Can't open `%s'", local);
eedc536d
PA
718 code = -1;
719 goto cleanupsend;
720 }
721 closefunc = fclose;
722 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
723 fprintf(ttyout, "%s: not a plain file.\n", local);
724 code = -1;
725 goto cleanupsend;
726 }
727 filesize = st.st_size;
728 }
729 if (initconn()) {
730 code = -1;
731 goto cleanupsend;
732 }
733 if (sigsetjmp(xferabort, 1))
734 goto abort;
735
736 if (restart_point &&
737 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
738 int rc;
739
740 rc = -1;
741 switch (curtype) {
742 case TYPE_A:
743 rc = fseeko(fin, restart_point, SEEK_SET);
744 break;
745 case TYPE_I:
746 case TYPE_L:
747 rc = lseek(fileno(fin), restart_point, SEEK_SET);
748 break;
749 }
750 if (rc < 0) {
0511850f 751 warn("Can't seek to restart `%s'", local);
eedc536d
PA
752 goto cleanupsend;
753 }
754 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
755 goto cleanupsend;
756 lmode = "r+";
757 }
758 if (remote) {
759 if (command("%s %s", cmd, remote) != PRELIM)
760 goto cleanupsend;
761 } else {
762 if (command("%s", cmd) != PRELIM)
763 goto cleanupsend;
764 }
765 dirchange = 1;
766 dout = dataconn(lmode);
767 if (dout == NULL)
768 goto abort;
769
c81ae005 770 assert(sndbuf_size > 0);
20e59a13 771 if ((size_t)sndbuf_size > bufsize) {
eedc536d
PA
772 if (buf)
773 (void)free(buf);
774 bufsize = sndbuf_size;
775 buf = ftp_malloc(bufsize);
776 }
777
778 progressmeter(-1);
779 oldintp = xsignal(SIGPIPE, SIG_IGN);
c106ca54 780 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
eedc536d
PA
781
782 switch (curtype) {
783
784 case TYPE_I:
785 case TYPE_L:
c106ca54
PA
786 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
787 rate_put, hash_interval);
788 if (c == 1) {
0511850f 789 warn("Reading `%s'", local);
c106ca54 790 } else if (c == 2) {
eedc536d 791 if (errno != EPIPE)
0511850f 792 warn("Writing to network");
eedc536d
PA
793 bytes = -1;
794 }
795 break;
796
797 case TYPE_A:
798 while ((c = getc(fin)) != EOF) {
799 if (c == '\n') {
c106ca54 800 while (hash_interval && bytes >= hashbytes) {
eedc536d
PA
801 (void)putc('#', ttyout);
802 (void)fflush(ttyout);
803 hashbytes += mark;
804 }
805 if (ferror(dout))
806 break;
807 (void)putc('\r', dout);
808 bytes++;
809 }
810 (void)putc(c, dout);
811 bytes++;
20e59a13 812#if 0 /* this violates RFC 959 */
eedc536d
PA
813 if (c == '\r') {
814 (void)putc('\0', dout);
815 bytes++;
816 }
817#endif
818 }
c106ca54 819 if (hash_interval) {
eedc536d
PA
820 if (bytes < hashbytes)
821 (void)putc('#', ttyout);
822 (void)putc('\n', ttyout);
823 }
824 if (ferror(fin))
0511850f 825 warn("Reading `%s'", local);
eedc536d
PA
826 if (ferror(dout)) {
827 if (errno != EPIPE)
0511850f 828 warn("Writing to network");
eedc536d
PA
829 bytes = -1;
830 }
831 break;
832 }
833
834 progressmeter(1);
835 if (closefunc != NULL) {
836 (*closefunc)(fin);
837 fin = NULL;
838 }
839 (void)fclose(dout);
840 dout = NULL;
841 (void)getreply(0);
842 if (bytes > 0)
843 ptransfer(0);
844 goto cleanupsend;
845
846 abort:
847 (void)xsignal(SIGINT, oldintr);
848 oldintr = NULL;
849 if (!cpend) {
850 code = -1;
851 goto cleanupsend;
852 }
853 if (data >= 0) {
854 (void)close(data);
855 data = -1;
856 }
857 if (dout) {
858 (void)fclose(dout);
859 dout = NULL;
860 }
861 (void)getreply(0);
862 code = -1;
863 if (bytes > 0)
864 ptransfer(0);
865
866 cleanupsend:
867 if (oldintr)
868 (void)xsignal(SIGINT, oldintr);
869 if (oldintp)
870 (void)xsignal(SIGPIPE, oldintp);
871 if (data >= 0) {
872 (void)close(data);
873 data = -1;
874 }
875 if (closefunc != NULL && fin != NULL)
876 (*closefunc)(fin);
877 if (dout)
878 (void)fclose(dout);
879 progress = oprogress;
880 restart_point = 0;
881 bytes = 0;
882}
883
884void
0511850f 885recvrequest(const char *cmd, const char *volatile local, const char *remote,
eedc536d
PA
886 const char *lmode, int printnames, int ignorespecial)
887{
0511850f
PA
888 FILE *volatile fout;
889 FILE *volatile din;
890 int (*volatile closefunc)(FILE *);
891 sigfunc volatile oldintr;
892 sigfunc volatile oldintp;
eedc536d 893 int c, d;
0511850f
PA
894 int volatile is_retr;
895 int volatile tcrflag;
896 int volatile bare_lfs;
eedc536d
PA
897 static size_t bufsize;
898 static char *buf;
0511850f 899 off_t volatile hashbytes;
c106ca54 900 int hash_interval;
eedc536d
PA
901 struct stat st;
902 time_t mtime;
903 struct timeval tval[2];
904 int oprogress;
905 int opreserve;
906
eedc536d
PA
907 fout = NULL;
908 din = NULL;
909 hashbytes = mark;
910 direction = "received";
911 bytes = 0;
912 bare_lfs = 0;
913 filesize = -1;
914 oprogress = progress;
915 opreserve = preserve;
916 is_retr = (strcmp(cmd, "RETR") == 0);
917 if (is_retr && verbose && printnames) {
918 if (ignorespecial || *local != '-')
919 fprintf(ttyout, "local: %s ", local);
920 if (remote)
921 fprintf(ttyout, "remote: %s\n", remote);
922 }
923 if (proxy && is_retr) {
924 proxtrans(cmd, local, remote);
925 return;
926 }
927 closefunc = NULL;
928 oldintr = NULL;
929 oldintp = NULL;
930 tcrflag = !crflag && is_retr;
931 if (sigsetjmp(xferabort, 1)) {
932 while (cpend)
933 (void)getreply(0);
934 code = -1;
935 goto cleanuprecv;
936 }
937 (void)xsignal(SIGQUIT, psummary);
938 oldintr = xsignal(SIGINT, abortxfer);
939 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
940 if (access(local, W_OK) < 0) {
941 char *dir = strrchr(local, '/');
942
943 if (errno != ENOENT && errno != EACCES) {
0511850f 944 warn("Can't access `%s'", local);
eedc536d
PA
945 code = -1;
946 goto cleanuprecv;
947 }
948 if (dir != NULL)
949 *dir = 0;
950 d = access(dir == local ? "/" :
951 dir ? local : ".", W_OK);
952 if (dir != NULL)
953 *dir = '/';
954 if (d < 0) {
0511850f 955 warn("Can't access `%s'", local);
eedc536d
PA
956 code = -1;
957 goto cleanuprecv;
958 }
959 if (!runique && errno == EACCES &&
960 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
0511850f 961 warn("Can't chmod `%s'", local);
eedc536d
PA
962 code = -1;
963 goto cleanuprecv;
964 }
965 if (runique && errno == EACCES &&
966 (local = gunique(local)) == NULL) {
967 code = -1;
968 goto cleanuprecv;
969 }
970 }
971 else if (runique && (local = gunique(local)) == NULL) {
972 code = -1;
973 goto cleanuprecv;
974 }
975 }
976 if (!is_retr) {
977 if (curtype != TYPE_A)
978 changetype(TYPE_A, 0);
979 } else {
980 if (curtype != type)
981 changetype(type, 0);
982 filesize = remotesize(remote, 0);
983 if (code == 421 || code == -1)
984 goto cleanuprecv;
985 }
986 if (initconn()) {
987 code = -1;
988 goto cleanuprecv;
989 }
990 if (sigsetjmp(xferabort, 1))
991 goto abort;
992 if (is_retr && restart_point &&
993 command("REST " LLF, (LLT) restart_point) != CONTINUE)
994 goto cleanuprecv;
995 if (! EMPTYSTRING(remote)) {
996 if (command("%s %s", cmd, remote) != PRELIM)
997 goto cleanuprecv;
998 } else {
999 if (command("%s", cmd) != PRELIM)
1000 goto cleanuprecv;
1001 }
1002 din = dataconn("r");
1003 if (din == NULL)
1004 goto abort;
1005 if (!ignorespecial && strcmp(local, "-") == 0) {
1006 fout = stdout;
1007 progress = 0;
1008 preserve = 0;
1009 } else if (!ignorespecial && *local == '|') {
1010 oldintp = xsignal(SIGPIPE, SIG_IGN);
1011 fout = popen(local + 1, "w");
1012 if (fout == NULL) {
0511850f 1013 warn("Can't execute `%s'", local+1);
eedc536d
PA
1014 goto abort;
1015 }
1016 progress = 0;
1017 preserve = 0;
1018 closefunc = pclose;
1019 } else {
1020 fout = fopen(local, lmode);
1021 if (fout == NULL) {
0511850f 1022 warn("Can't open `%s'", local);
eedc536d
PA
1023 goto abort;
1024 }
1025 closefunc = fclose;
1026 }
1027
1028 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1029 progress = 0;
1030 preserve = 0;
1031 }
c81ae005 1032 assert(rcvbuf_size > 0);
20e59a13 1033 if ((size_t)rcvbuf_size > bufsize) {
eedc536d
PA
1034 if (buf)
1035 (void)free(buf);
1036 bufsize = rcvbuf_size;
1037 buf = ftp_malloc(bufsize);
1038 }
1039
1040 progressmeter(-1);
c106ca54 1041 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
eedc536d
PA
1042
1043 switch (curtype) {
1044
1045 case TYPE_I:
1046 case TYPE_L:
1047 if (is_retr && restart_point &&
1048 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
0511850f 1049 warn("Can't seek to restart `%s'", local);
eedc536d
PA
1050 goto cleanuprecv;
1051 }
c106ca54
PA
1052 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1053 rate_get, hash_interval);
1054 if (c == 1) {
eedc536d 1055 if (errno != EPIPE)
0511850f 1056 warn("Reading from network");
eedc536d 1057 bytes = -1;
c106ca54
PA
1058 } else if (c == 2) {
1059 warn("Writing `%s'", local);
eedc536d
PA
1060 }
1061 break;
1062
1063 case TYPE_A:
1064 if (is_retr && restart_point) {
1065 int ch;
1066 off_t i;
1067
1068 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1069 goto done;
1070 for (i = 0; i++ < restart_point;) {
1071 if ((ch = getc(fout)) == EOF)
1072 goto done;
1073 if (ch == '\n')
1074 i++;
1075 }
1076 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1077 done:
0511850f 1078 warn("Can't seek to restart `%s'", local);
eedc536d
PA
1079 goto cleanuprecv;
1080 }
1081 }
1082 while ((c = getc(din)) != EOF) {
1083 if (c == '\n')
1084 bare_lfs++;
1085 while (c == '\r') {
c106ca54 1086 while (hash_interval && bytes >= hashbytes) {
eedc536d
PA
1087 (void)putc('#', ttyout);
1088 (void)fflush(ttyout);
1089 hashbytes += mark;
1090 }
1091 bytes++;
1092 if ((c = getc(din)) != '\n' || tcrflag) {
1093 if (ferror(fout))
1094 goto break2;
1095 (void)putc('\r', fout);
1096 if (c == '\0') {
1097 bytes++;
1098 goto contin2;
1099 }
1100 if (c == EOF)
1101 goto contin2;
1102 }
1103 }
1104 (void)putc(c, fout);
1105 bytes++;
1106 contin2: ;
1107 }
1108 break2:
c106ca54 1109 if (hash_interval) {
eedc536d
PA
1110 if (bytes < hashbytes)
1111 (void)putc('#', ttyout);
1112 (void)putc('\n', ttyout);
1113 }
1114 if (ferror(din)) {
1115 if (errno != EPIPE)
0511850f 1116 warn("Reading from network");
eedc536d
PA
1117 bytes = -1;
1118 }
1119 if (ferror(fout))
0511850f 1120 warn("Writing `%s'", local);
eedc536d
PA
1121 break;
1122 }
1123
1124 progressmeter(1);
1125 if (closefunc != NULL) {
1126 (*closefunc)(fout);
1127 fout = NULL;
1128 }
1129 (void)fclose(din);
1130 din = NULL;
1131 (void)getreply(0);
1132 if (bare_lfs) {
1133 fprintf(ttyout,
1134 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1135 bare_lfs);
1136 fputs("File may not have transferred correctly.\n", ttyout);
1137 }
1138 if (bytes >= 0 && is_retr) {
1139 if (bytes > 0)
1140 ptransfer(0);
1141 if (preserve && (closefunc == fclose)) {
1142 mtime = remotemodtime(remote, 0);
1143 if (mtime != -1) {
1144 (void)gettimeofday(&tval[0], NULL);
1145 tval[1].tv_sec = mtime;
1146 tval[1].tv_usec = 0;
1147 if (utimes(local, tval) == -1) {
1148 fprintf(ttyout,
1149 "Can't change modification time on %s to %s",
c106ca54
PA
1150 local,
1151 rfc2822time(localtime(&mtime)));
eedc536d
PA
1152 }
1153 }
1154 }
1155 }
1156 goto cleanuprecv;
1157
1158 abort:
1159 /*
20e59a13 1160 * abort using RFC 959 recommended IP,SYNC sequence
eedc536d
PA
1161 */
1162 if (! sigsetjmp(xferabort, 1)) {
1163 /* this is the first call */
1164 (void)xsignal(SIGINT, abort_squared);
1165 if (!cpend) {
1166 code = -1;
1167 goto cleanuprecv;
1168 }
1169 abort_remote(din);
1170 }
1171 code = -1;
1172 if (bytes > 0)
1173 ptransfer(0);
1174
1175 cleanuprecv:
1176 if (oldintr)
1177 (void)xsignal(SIGINT, oldintr);
1178 if (oldintp)
1179 (void)xsignal(SIGPIPE, oldintp);
1180 if (data >= 0) {
1181 (void)close(data);
1182 data = -1;
1183 }
1184 if (closefunc != NULL && fout != NULL)
1185 (*closefunc)(fout);
1186 if (din)
1187 (void)fclose(din);
1188 progress = oprogress;
1189 preserve = opreserve;
1190 bytes = 0;
1191}
1192
1193/*
1194 * Need to start a listen on the data channel before we send the command,
1195 * otherwise the server's connect may fail.
1196 */
1197int
1198initconn(void)
1199{
1200 char *p, *a;
1201 int result, tmpno = 0;
1202 int on = 1;
1203 int error;
1204 unsigned int addr[16], port[2];
1205 unsigned int af, hal, pal;
1206 socklen_t len;
20e59a13 1207 const char *pasvcmd = NULL;
0511850f 1208 int overbose;
eedc536d
PA
1209
1210#ifdef INET6
1211#ifndef NO_DEBUG
1212 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1213 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1214 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
0511850f 1215 warnx("Use of scoped addresses can be troublesome");
eedc536d
PA
1216 }
1217#endif
1218#endif
0511850f 1219
eedc536d
PA
1220 reinit:
1221 if (passivemode) {
1222 data_addr = myctladdr;
1223 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1224 if (data < 0) {
0511850f 1225 warn("Can't create socket for data connection");
eedc536d
PA
1226 return (1);
1227 }
1228 if ((options & SO_DEBUG) &&
1229 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1230 (void *)&on, sizeof(on)) == -1) {
1231 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1232 }
1233 result = COMPLETE + 1;
1234 switch (data_addr.su_family) {
1235 case AF_INET:
1236 if (epsv4 && !epsv4bad) {
1237 pasvcmd = "EPSV";
0511850f
PA
1238 overbose = verbose;
1239 if (ftp_debug == 0)
1240 verbose = -1;
eedc536d 1241 result = command("EPSV");
0511850f
PA
1242 verbose = overbose;
1243 if (verbose > 0 &&
1244 (result == COMPLETE || !connected))
1245 fprintf(ttyout, "%s\n", reply_string);
eedc536d
PA
1246 if (!connected)
1247 return (1);
1248 /*
1249 * this code is to be friendly with broken
1250 * BSDI ftpd
1251 */
1252 if (code / 10 == 22 && code != 229) {
1253 fputs(
1254"wrong server: return code must be 229\n",
1255 ttyout);
1256 result = COMPLETE + 1;
1257 }
1258 if (result != COMPLETE) {
1259 epsv4bad = 1;
1260 DPRINTF("disabling epsv4 for this "
1261 "connection\n");
1262 }
1263 }
1264 if (result != COMPLETE) {
1265 pasvcmd = "PASV";
1266 result = command("PASV");
1267 if (!connected)
1268 return (1);
1269 }
1270 break;
1271#ifdef INET6
1272 case AF_INET6:
fa70ef36
PA
1273 if (epsv6 && !epsv6bad) {
1274 pasvcmd = "EPSV";
1275 overbose = verbose;
1276 if (ftp_debug == 0)
1277 verbose = -1;
1278 result = command("EPSV");
1279 verbose = overbose;
1280 if (verbose > 0 &&
1281 (result == COMPLETE || !connected))
1282 fprintf(ttyout, "%s\n", reply_string);
1283 if (!connected)
1284 return (1);
1285 /*
1286 * this code is to be friendly with
1287 * broken BSDI ftpd
1288 */
1289 if (code / 10 == 22 && code != 229) {
1290 fputs(
1291 "wrong server: return code must be 229\n",
1292 ttyout);
1293 result = COMPLETE + 1;
1294 }
1295 if (result != COMPLETE) {
1296 epsv6bad = 1;
1297 DPRINTF("disabling epsv6 for this "
1298 "connection\n");
1299 }
eedc536d
PA
1300 }
1301 if (result != COMPLETE) {
1302 pasvcmd = "LPSV";
1303 result = command("LPSV");
1304 }
1305 if (!connected)
1306 return (1);
1307 break;
1308#endif
1309 default:
1310 result = COMPLETE + 1;
1311 break;
1312 }
1313 if (result != COMPLETE) {
1314 if (activefallback) {
1315 (void)close(data);
1316 data = -1;
1317 passivemode = 0;
1318#if 0
1319 activefallback = 0;
1320#endif
1321 goto reinit;
1322 }
1323 fputs("Passive mode refused.\n", ttyout);
1324 goto bad;
1325 }
1326
1327#define pack2(var, off) \
1328 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1329#define pack4(var, off) \
1330 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1331 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1332#define UC(b) (((int)b)&0xff)
1333
1334 /*
1335 * What we've got at this point is a string of comma separated
1336 * one-byte unsigned integer values, separated by commas.
1337 */
1338 if (strcmp(pasvcmd, "PASV") == 0) {
1339 if (data_addr.su_family != AF_INET) {
1340 fputs(
1341 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1342 error = 1;
1343 goto bad;
1344 }
1345 if (code / 10 == 22 && code != 227) {
1346 fputs("wrong server: return code must be 227\n",
1347 ttyout);
1348 error = 1;
1349 goto bad;
1350 }
1351 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1352 &addr[0], &addr[1], &addr[2], &addr[3],
1353 &port[0], &port[1]);
1354 if (error != 6) {
1355 fputs(
1356"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1357 error = 1;
1358 goto bad;
1359 }
1360 error = 0;
1361 memset(&data_addr, 0, sizeof(data_addr));
1362 data_addr.su_family = AF_INET;
1363 data_addr.su_len = sizeof(struct sockaddr_in);
1364 data_addr.si_su.su_sin.sin_addr.s_addr =
1365 htonl(pack4(addr, 0));
1366 data_addr.su_port = htons(pack2(port, 0));
1367 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1368 if (code / 10 == 22 && code != 228) {
1369 fputs("wrong server: return code must be 228\n",
1370 ttyout);
1371 error = 1;
1372 goto bad;
1373 }
1374 switch (data_addr.su_family) {
1375 case AF_INET:
1376 error = sscanf(pasv,
1377"%u,%u,%u,%u,%u,%u,%u,%u,%u",
1378 &af, &hal,
1379 &addr[0], &addr[1], &addr[2], &addr[3],
1380 &pal, &port[0], &port[1]);
1381 if (error != 9) {
1382 fputs(
1383"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1384 error = 1;
1385 goto bad;
1386 }
1387 if (af != 4 || hal != 4 || pal != 2) {
1388 fputs(
1389"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1390 error = 1;
1391 goto bad;
1392 }
1393
1394 error = 0;
1395 memset(&data_addr, 0, sizeof(data_addr));
1396 data_addr.su_family = AF_INET;
1397 data_addr.su_len = sizeof(struct sockaddr_in);
1398 data_addr.si_su.su_sin.sin_addr.s_addr =
1399 htonl(pack4(addr, 0));
1400 data_addr.su_port = htons(pack2(port, 0));
1401 break;
1402#ifdef INET6
1403 case AF_INET6:
1404 error = sscanf(pasv,
1405"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1406 &af, &hal,
1407 &addr[0], &addr[1], &addr[2], &addr[3],
1408 &addr[4], &addr[5], &addr[6], &addr[7],
1409 &addr[8], &addr[9], &addr[10],
1410 &addr[11], &addr[12], &addr[13],
1411 &addr[14], &addr[15],
1412 &pal, &port[0], &port[1]);
1413 if (error != 21) {
1414 fputs(
1415"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1416 error = 1;
1417 goto bad;
1418 }
1419 if (af != 6 || hal != 16 || pal != 2) {
1420 fputs(
1421"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1422 error = 1;
1423 goto bad;
1424 }
1425
1426 error = 0;
1427 memset(&data_addr, 0, sizeof(data_addr));
1428 data_addr.su_family = AF_INET6;
1429 data_addr.su_len = sizeof(struct sockaddr_in6);
1430 {
20e59a13 1431 size_t i;
eedc536d
PA
1432 for (i = 0; i < sizeof(struct in6_addr); i++) {
1433 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1434 UC(addr[i]);
1435 }
1436 }
1437 data_addr.su_port = htons(pack2(port, 0));
1438 break;
1439#endif
1440 default:
1441 error = 1;
1442 }
1443 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1444 char delim[4];
1445
1446 port[0] = 0;
1447 if (code / 10 == 22 && code != 229) {
1448 fputs("wrong server: return code must be 229\n",
1449 ttyout);
1450 error = 1;
1451 goto bad;
1452 }
1453 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1454 &delim[1], &delim[2], &port[1],
1455 &delim[3]) != 5) {
1456 fputs("parse error!\n", ttyout);
1457 error = 1;
1458 goto bad;
1459 }
1460 if (delim[0] != delim[1] || delim[0] != delim[2]
1461 || delim[0] != delim[3]) {
1462 fputs("parse error!\n", ttyout);
1463 error = 1;
1464 goto bad;
1465 }
1466 data_addr = hisctladdr;
1467 data_addr.su_port = htons(port[1]);
1468 } else
1469 goto bad;
1470
0511850f 1471 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
d2b51479 1472 data_addr.su_len, 1) < 0) {
eedc536d
PA
1473 if (activefallback) {
1474 (void)close(data);
1475 data = -1;
1476 passivemode = 0;
1477#if 0
1478 activefallback = 0;
1479#endif
1480 goto reinit;
1481 }
eedc536d
PA
1482 goto bad;
1483 }
1484#ifdef IPTOS_THROUGHPUT
1485 if (data_addr.su_family == AF_INET) {
1486 on = IPTOS_THROUGHPUT;
1487 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1488 (void *)&on, sizeof(on)) == -1) {
1489 DWARN("setsockopt %s (ignored)",
1490 "IPTOS_THROUGHPUT");
1491 }
1492 }
1493#endif
1494 return (0);
1495 }
1496
1497 noport:
1498 data_addr = myctladdr;
1499 if (sendport)
1500 data_addr.su_port = 0; /* let system pick one */
1501 if (data != -1)
1502 (void)close(data);
1503 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1504 if (data < 0) {
0511850f 1505 warn("Can't create socket for data connection");
eedc536d
PA
1506 if (tmpno)
1507 sendport = 1;
1508 return (1);
1509 }
1510 if (!sendport)
1511 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1512 (void *)&on, sizeof(on)) == -1) {
0511850f 1513 warn("Can't set SO_REUSEADDR on data connection");
eedc536d
PA
1514 goto bad;
1515 }
1516 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1517 data_addr.su_len) < 0) {
0511850f 1518 warn("Can't bind for data connection");
eedc536d
PA
1519 goto bad;
1520 }
1521 if ((options & SO_DEBUG) &&
1522 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1523 (void *)&on, sizeof(on)) == -1) {
1524 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1525 }
1526 len = sizeof(data_addr.si_su);
1527 memset((char *)&data_addr, 0, sizeof (data_addr));
1528 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
0511850f 1529 warn("Can't determine my address of data connection");
eedc536d
PA
1530 goto bad;
1531 }
1532 data_addr.su_len = len;
1533 if (ftp_listen(data, 1) < 0)
0511850f 1534 warn("Can't listen to data connection");
eedc536d
PA
1535
1536 if (sendport) {
1537 char hname[NI_MAXHOST], sname[NI_MAXSERV];
eedc536d
PA
1538 struct sockinet tmp;
1539
1540 switch (data_addr.su_family) {
1541 case AF_INET:
1542 if (!epsv4 || epsv4bad) {
1543 result = COMPLETE + 1;
1544 break;
1545 }
1546 /* FALLTHROUGH */
1547#ifdef INET6
1548 case AF_INET6:
fa70ef36
PA
1549 if (!epsv6 || epsv6bad) {
1550 result = COMPLETE + 1;
1551 break;
1552 }
eedc536d
PA
1553#endif
1554 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1555 tmp = data_addr;
1556#ifdef INET6
1557 if (tmp.su_family == AF_INET6)
1558 tmp.si_su.su_sin6.sin6_scope_id = 0;
1559#endif
1560 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1561 tmp.su_len, hname, sizeof(hname), sname,
1562 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1563 result = ERROR;
1564 } else {
0511850f
PA
1565 overbose = verbose;
1566 if (ftp_debug == 0)
1567 verbose = -1;
20e59a13 1568 result = command("EPRT |%u|%s|%s|", af, hname,
eedc536d 1569 sname);
0511850f
PA
1570 verbose = overbose;
1571 if (verbose > 0 &&
1572 (result == COMPLETE || !connected))
1573 fprintf(ttyout, "%s\n", reply_string);
eedc536d
PA
1574 if (!connected)
1575 return (1);
1576 if (result != COMPLETE) {
1577 epsv4bad = 1;
1578 DPRINTF("disabling epsv4 for this "
1579 "connection\n");
1580 }
1581 }
1582 break;
1583 default:
1584 result = COMPLETE + 1;
1585 break;
1586 }
1587 if (result == COMPLETE)
1588 goto skip_port;
1589
1590 switch (data_addr.su_family) {
1591 case AF_INET:
1592 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1593 p = (char *)&data_addr.su_port;
1594 result = command("PORT %d,%d,%d,%d,%d,%d",
1595 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1596 UC(p[0]), UC(p[1]));
1597 break;
1598#ifdef INET6
c81ae005
PA
1599 case AF_INET6: {
1600 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)];
1601 uint8_t up[sizeof(data_addr.su_port)];
1602
1603 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr,
1604 sizeof(ua));
1605 memcpy(up, &data_addr.su_port, sizeof(up));
1606
eedc536d
PA
1607 result = command(
1608 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1609 6, 16,
c81ae005
PA
1610 ua[0], ua[1], ua[2], ua[3],
1611 ua[4], ua[5], ua[6], ua[7],
1612 ua[8], ua[9], ua[10], ua[11],
1613 ua[12], ua[13], ua[14], ua[15],
1614 2,
1615 up[0], up[1]);
eedc536d 1616 break;
c81ae005 1617 }
eedc536d
PA
1618#endif
1619 default:
1620 result = COMPLETE + 1; /* xxx */
1621 }
1622 if (!connected)
1623 return (1);
1624 skip_port:
1625
1626 if (result == ERROR && sendport == -1) {
1627 sendport = 0;
1628 tmpno = 1;
1629 goto noport;
1630 }
1631 return (result != COMPLETE);
1632 }
1633 if (tmpno)
1634 sendport = 1;
1635#ifdef IPTOS_THROUGHPUT
1636 if (data_addr.su_family == AF_INET) {
1637 on = IPTOS_THROUGHPUT;
1638 if (setsockopt(data, IPPROTO_IP, IP_TOS,
20e59a13 1639 (void *)&on, sizeof(on)) == -1) {
eedc536d 1640 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
20e59a13 1641 }
eedc536d
PA
1642 }
1643#endif
1644 return (0);
1645 bad:
1646 (void)close(data);
1647 data = -1;
1648 if (tmpno)
1649 sendport = 1;
1650 return (1);
1651}
1652
1653FILE *
1654dataconn(const char *lmode)
1655{
1656 struct sockinet from;
1657 int s, flags, rv, timeout;
1658 struct timeval endtime, now, td;
1659 struct pollfd pfd[1];
1660 socklen_t fromlen;
1661
1662 if (passivemode) /* passive data connection */
1663 return (fdopen(data, lmode));
1664
1665 /* active mode data connection */
1666
1667 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1668 goto dataconn_failed; /* get current socket flags */
1669 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1670 goto dataconn_failed; /* set non-blocking connect */
1671
1672 /* NOTE: we now must restore socket flags on successful exit */
1673
1674 /* limit time waiting on listening socket */
1675 pfd[0].fd = data;
1676 pfd[0].events = POLLIN;
1677 (void)gettimeofday(&endtime, NULL); /* determine end time */
1678 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1679 /* without -q, default to 60s */
1680 do {
1681 (void)gettimeofday(&now, NULL);
1682 timersub(&endtime, &now, &td);
1683 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1684 if (timeout < 0)
1685 timeout = 0;
1686 rv = ftp_poll(pfd, 1, timeout);
1687 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1688 if (rv == -1) {
0511850f 1689 warn("Can't poll waiting before accept");
eedc536d
PA
1690 goto dataconn_failed;
1691 }
1692 if (rv == 0) {
0511850f 1693 warnx("Poll timeout waiting before accept");
eedc536d
PA
1694 goto dataconn_failed;
1695 }
1696
1697 /* (non-blocking) accept the connection */
1698 fromlen = myctladdr.su_len;
1699 do {
1700 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1701 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1702 if (s == -1) {
0511850f 1703 warn("Can't accept data connection");
eedc536d
PA
1704 goto dataconn_failed;
1705 }
1706
1707 (void)close(data);
1708 data = s;
1709 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1710 goto dataconn_failed;
1711
1712#ifdef IPTOS_THROUGHPUT
1713 if (from.su_family == AF_INET) {
1714 int tos = IPTOS_THROUGHPUT;
1715 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1716 (void *)&tos, sizeof(tos)) == -1) {
1717 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1718 }
1719 }
1720#endif
1721 return (fdopen(data, lmode));
1722
1723 dataconn_failed:
1724 (void)close(data);
1725 data = -1;
1726 return (NULL);
1727}
1728
1729void
1730psabort(int notused)
1731{
1732 int oerrno = errno;
1733
1734 sigint_raised = 1;
1735 alarmtimer(0);
1736 abrtflag++;
1737 errno = oerrno;
1738}
1739
1740void
1741pswitch(int flag)
1742{
1743 sigfunc oldintr;
1744 static struct comvars {
1745 int connect;
1746 char name[MAXHOSTNAMELEN];
1747 struct sockinet mctl;
1748 struct sockinet hctl;
1749 FILE *in;
1750 FILE *out;
1751 int tpe;
1752 int curtpe;
1753 int cpnd;
1754 int sunqe;
1755 int runqe;
1756 int mcse;
1757 int ntflg;
1758 char nti[17];
1759 char nto[17];
1760 int mapflg;
1761 char mi[MAXPATHLEN];
1762 char mo[MAXPATHLEN];
1763 } proxstruct, tmpstruct;
1764 struct comvars *ip, *op;
1765
1766 abrtflag = 0;
1767 oldintr = xsignal(SIGINT, psabort);
1768 if (flag) {
1769 if (proxy)
1770 return;
1771 ip = &tmpstruct;
1772 op = &proxstruct;
1773 proxy++;
1774 } else {
1775 if (!proxy)
1776 return;
1777 ip = &proxstruct;
1778 op = &tmpstruct;
1779 proxy = 0;
1780 }
1781 ip->connect = connected;
1782 connected = op->connect;
1783 if (hostname)
1784 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1785 else
1786 ip->name[0] = '\0';
1787 hostname = op->name;
1788 ip->hctl = hisctladdr;
1789 hisctladdr = op->hctl;
1790 ip->mctl = myctladdr;
1791 myctladdr = op->mctl;
1792 ip->in = cin;
1793 cin = op->in;
1794 ip->out = cout;
1795 cout = op->out;
1796 ip->tpe = type;
1797 type = op->tpe;
1798 ip->curtpe = curtype;
1799 curtype = op->curtpe;
1800 ip->cpnd = cpend;
1801 cpend = op->cpnd;
1802 ip->sunqe = sunique;
1803 sunique = op->sunqe;
1804 ip->runqe = runique;
1805 runique = op->runqe;
1806 ip->mcse = mcase;
1807 mcase = op->mcse;
1808 ip->ntflg = ntflag;
1809 ntflag = op->ntflg;
1810 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1811 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1812 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1813 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1814 ip->mapflg = mapflag;
1815 mapflag = op->mapflg;
1816 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1817 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1818 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1819 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1820 (void)xsignal(SIGINT, oldintr);
1821 if (abrtflag) {
1822 abrtflag = 0;
1823 (*oldintr)(SIGINT);
1824 }
1825}
1826
c81ae005 1827__dead static void
eedc536d
PA
1828abortpt(int notused)
1829{
1830
1831 sigint_raised = 1;
1832 alarmtimer(0);
1833 if (fromatty)
1834 write(fileno(ttyout), "\n", 1);
1835 ptabflg++;
1836 mflag = 0;
1837 abrtflag = 0;
1838 siglongjmp(ptabort, 1);
1839}
1840
1841void
1842proxtrans(const char *cmd, const char *local, const char *remote)
1843{
0511850f 1844 sigfunc volatile oldintr;
eedc536d 1845 int prox_type, nfnd;
0511850f 1846 int volatile secndflag;
20e59a13 1847 const char *volatile cmd2;
eedc536d
PA
1848
1849 oldintr = NULL;
1850 secndflag = 0;
1851 if (strcmp(cmd, "RETR"))
1852 cmd2 = "RETR";
1853 else
1854 cmd2 = runique ? "STOU" : "STOR";
1855 if ((prox_type = type) == 0) {
1856 if (unix_server && unix_proxy)
1857 prox_type = TYPE_I;
1858 else
1859 prox_type = TYPE_A;
1860 }
1861 if (curtype != prox_type)
1862 changetype(prox_type, 1);
1863 if (command("PASV") != COMPLETE) {
1864 fputs("proxy server does not support third party transfers.\n",
1865 ttyout);
1866 return;
1867 }
1868 pswitch(0);
1869 if (!connected) {
1870 fputs("No primary connection.\n", ttyout);
1871 pswitch(1);
1872 code = -1;
1873 return;
1874 }
1875 if (curtype != prox_type)
1876 changetype(prox_type, 1);
1877 if (command("PORT %s", pasv) != COMPLETE) {
1878 pswitch(1);
1879 return;
1880 }
1881 if (sigsetjmp(ptabort, 1))
1882 goto abort;
1883 oldintr = xsignal(SIGINT, abortpt);
1884 if ((restart_point &&
1885 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1886 || (command("%s %s", cmd, remote) != PRELIM)) {
1887 (void)xsignal(SIGINT, oldintr);
1888 pswitch(1);
1889 return;
1890 }
1891 sleep(2);
1892 pswitch(1);
1893 secndflag++;
1894 if ((restart_point &&
1895 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1896 || (command("%s %s", cmd2, local) != PRELIM))
1897 goto abort;
1898 ptflag++;
1899 (void)getreply(0);
1900 pswitch(0);
1901 (void)getreply(0);
1902 (void)xsignal(SIGINT, oldintr);
1903 pswitch(1);
1904 ptflag = 0;
1905 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1906 return;
1907 abort:
1908 if (sigsetjmp(xferabort, 1)) {
1909 (void)xsignal(SIGINT, oldintr);
1910 return;
1911 }
1912 (void)xsignal(SIGINT, abort_squared);
1913 ptflag = 0;
1914 if (strcmp(cmd, "RETR") && !proxy)
1915 pswitch(1);
1916 else if (!strcmp(cmd, "RETR") && proxy)
1917 pswitch(0);
1918 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1919 if (command("%s %s", cmd2, local) != PRELIM) {
1920 pswitch(0);
1921 if (cpend)
1922 abort_remote(NULL);
1923 }
1924 pswitch(1);
1925 if (ptabflg)
1926 code = -1;
1927 (void)xsignal(SIGINT, oldintr);
1928 return;
1929 }
1930 if (cpend)
1931 abort_remote(NULL);
1932 pswitch(!proxy);
1933 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1934 if (command("%s %s", cmd2, local) != PRELIM) {
1935 pswitch(0);
1936 if (cpend)
1937 abort_remote(NULL);
1938 pswitch(1);
1939 if (ptabflg)
1940 code = -1;
1941 (void)xsignal(SIGINT, oldintr);
1942 return;
1943 }
1944 }
1945 if (cpend)
1946 abort_remote(NULL);
1947 pswitch(!proxy);
1948 if (cpend) {
1949 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1950 if (nfnd < 0)
0511850f 1951 warn("Error aborting proxy command");
eedc536d
PA
1952 if (ptabflg)
1953 code = -1;
1954 lostpeer(0);
1955 }
1956 (void)getreply(0);
1957 (void)getreply(0);
1958 }
1959 if (proxy)
1960 pswitch(0);
1961 pswitch(1);
1962 if (ptabflg)
1963 code = -1;
1964 (void)xsignal(SIGINT, oldintr);
1965}
1966
1967void
1968reset(int argc, char *argv[])
1969{
1970 int nfnd = 1;
1971
1972 if (argc == 0 && argv != NULL) {
1973 UPRINTF("usage: %s\n", argv[0]);
1974 code = -1;
1975 return;
1976 }
1977 while (nfnd > 0) {
1978 if ((nfnd = empty(cin, NULL, 0)) < 0) {
0511850f 1979 warn("Error resetting connection");
eedc536d
PA
1980 code = -1;
1981 lostpeer(0);
1982 } else if (nfnd)
1983 (void)getreply(0);
1984 }
1985}
1986
1987char *
1988gunique(const char *local)
1989{
1990 static char new[MAXPATHLEN];
1991 char *cp = strrchr(local, '/');
1992 int d, count=0, len;
1993 char ext = '1';
1994
1995 if (cp)
1996 *cp = '\0';
1997 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
1998 if (cp)
1999 *cp = '/';
2000 if (d < 0) {
0511850f 2001 warn("Can't access `%s'", local);
eedc536d
PA
2002 return (NULL);
2003 }
2004 len = strlcpy(new, local, sizeof(new));
2005 cp = &new[len];
2006 *cp++ = '.';
2007 while (!d) {
2008 if (++count == 100) {
2009 fputs("runique: can't find unique file name.\n",
2010 ttyout);
2011 return (NULL);
2012 }
2013 *cp++ = ext;
2014 *cp = '\0';
2015 if (ext == '9')
2016 ext = '0';
2017 else
2018 ext++;
2019 if ((d = access(new, F_OK)) < 0)
2020 break;
2021 if (ext != '0')
2022 cp--;
2023 else if (*(cp - 2) == '.')
2024 *(cp - 1) = '1';
2025 else {
2026 *(cp - 2) = *(cp - 2) + 1;
2027 cp--;
2028 }
2029 }
2030 return (new);
2031}
2032
2033/*
2034 * abort_squared --
2035 * aborts abort_remote(). lostpeer() is called because if the user is
2036 * too impatient to wait or there's another problem then ftp really
2037 * needs to get back to a known state.
2038 */
c81ae005 2039static void
eedc536d
PA
2040abort_squared(int dummy)
2041{
2042 char msgbuf[100];
2043 size_t len;
2044
2045 sigint_raised = 1;
2046 alarmtimer(0);
2047 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2048 sizeof(msgbuf));
2049 write(fileno(ttyout), msgbuf, len);
2050 lostpeer(0);
2051 siglongjmp(xferabort, 1);
2052}
2053
2054void
2055abort_remote(FILE *din)
2056{
2057 char buf[BUFSIZ];
2058 int nfnd;
2059
2060 if (cout == NULL) {
0511850f 2061 warnx("Lost control connection for abort");
eedc536d
PA
2062 if (ptabflg)
2063 code = -1;
2064 lostpeer(0);
2065 return;
2066 }
2067 /*
2068 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2069 * after urgent byte rather than before as is protocol now
2070 */
2071 buf[0] = IAC;
2072 buf[1] = IP;
2073 buf[2] = IAC;
2074 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
0511850f 2075 warn("Can't send abort message");
eedc536d
PA
2076 fprintf(cout, "%cABOR\r\n", DM);
2077 (void)fflush(cout);
2078 if ((nfnd = empty(cin, din, 10)) <= 0) {
2079 if (nfnd < 0)
0511850f 2080 warn("Can't send abort message");
eedc536d
PA
2081 if (ptabflg)
2082 code = -1;
2083 lostpeer(0);
2084 }
2085 if (din && (nfnd & 2)) {
2086 while (read(fileno(din), buf, BUFSIZ) > 0)
2087 continue;
2088 }
2089 if (getreply(0) == ERROR && code == 552) {
2090 /* 552 needed for nic style abort */
2091 (void)getreply(0);
2092 }
2093 (void)getreply(0);
2094}
2095
0511850f
PA
2096/*
2097 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2098 * IPv4 mapped address complicates too many things in FTP
2099 * protocol handling, as FTP protocol is defined differently
2100 * between IPv4 and IPv6.
2101 *
2102 * This may not be the best way to handle this situation,
2103 * since the semantics of IPv4 mapped address is defined in
2104 * the kernel. There are configurations where we should use
2105 * IPv4 mapped address as native IPv6 address, not as
2106 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2107 *
2108 * More complete solution would be to have an additional
2109 * getsockopt to grab "real" peername/sockname. "real"
2110 * peername/sockname will be AF_INET if IPv4 mapped address
2111 * is used to embed IPv4 address, and will be AF_INET6 if
2112 * we use it as native. What a mess!
2113 */
eedc536d
PA
2114void
2115ai_unmapped(struct addrinfo *ai)
2116{
2117#ifdef INET6
2118 struct sockaddr_in6 *sin6;
2119 struct sockaddr_in sin;
2120 socklen_t len;
2121
2122 if (ai->ai_family != AF_INET6)
2123 return;
2124 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2125 sizeof(sin) > ai->ai_addrlen)
2126 return;
2127 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2128 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2129 return;
2130
2131 memset(&sin, 0, sizeof(sin));
2132 sin.sin_family = AF_INET;
2133 len = sizeof(struct sockaddr_in);
2134 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2135 sizeof(sin.sin_addr));
2136 sin.sin_port = sin6->sin6_port;
2137
2138 ai->ai_family = AF_INET;
3b706bf0 2139#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
eedc536d
PA
2140 sin.sin_len = len;
2141#endif
2142 memcpy(ai->ai_addr, &sin, len);
2143 ai->ai_addrlen = len;
2144#endif
2145}
2146
2147#ifdef NO_USAGE
2148void
2149xusage(void)
2150{
2151 fputs("Usage error\n", ttyout);
2152}
2153#endif