Merge branch 'vendor/TEXINFO'
[dragonfly.git] / contrib / tnftp / ftp.c
CommitLineData
20e59a13 1/* $NetBSD: ftp.c,v 1.160 2010/03/05 07:41:10 lukem Exp $ */
eedc536d
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2
3/*-
20e59a13 4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
eedc536d
PA
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
PA
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
20e59a13 95__RCSID("$NetBSD: ftp.c,v 1.160 2010/03/05 07:41:10 lukem 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
111#include <ctype.h>
112#include <err.h>
113#include <errno.h>
114#include <fcntl.h>
115#include <netdb.h>
116#include <stdio.h>
117#include <stdlib.h>
118#include <string.h>
119#include <time.h>
120#include <unistd.h>
121#include <stdarg.h>
122
123#include "ftp_var.h"
124
125volatile sig_atomic_t abrtflag;
126volatile sig_atomic_t timeoutflag;
127
128sigjmp_buf ptabort;
129int ptabflg;
130int ptflag = 0;
131char pasv[BUFSIZ]; /* passive port for proxy data connection */
132
133static int empty(FILE *, FILE *, int);
134
135struct sockinet {
136 union sockunion {
137 struct sockaddr_in su_sin;
138#ifdef INET6
139 struct sockaddr_in6 su_sin6;
140#endif
141 } si_su;
3b706bf0 142#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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143 int si_len;
144#endif
145};
146
3b706bf0 147#if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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148# define su_len si_len
149#else
150# define su_len si_su.su_sin.sin_len
151#endif
152#define su_family si_su.su_sin.sin_family
153#define su_port si_su.su_sin.sin_port
154
155struct sockinet myctladdr, hisctladdr, data_addr;
156
157char *
20e59a13 158hookup(const char *host, const char *port)
eedc536d 159{
fa70ef36 160 int s = -1, error;
eedc536d 161 struct addrinfo hints, *res, *res0;
eedc536d 162 static char hostnamebuf[MAXHOSTNAMELEN];
eedc536d
PA
163 socklen_t len;
164 int on = 1;
165
166 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
167 memset((char *)&myctladdr, 0, sizeof (myctladdr));
168 memset(&hints, 0, sizeof(hints));
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PA
169 hints.ai_flags = AI_CANONNAME;
170 hints.ai_family = family;
171 hints.ai_socktype = SOCK_STREAM;
172 hints.ai_protocol = 0;
fa70ef36 173 error = getaddrinfo(host, port, &hints, &res0);
eedc536d 174 if (error) {
fa70ef36 175 warnx("Can't lookup `%s:%s': %s", host, port,
0511850f
PA
176 (error == EAI_SYSTEM) ? strerror(errno)
177 : gai_strerror(error));
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PA
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) {
fa70ef36
PA
190 char hname[NI_MAXHOST], sname[NI_MAXSERV];
191
eedc536d 192 ai_unmapped(res);
0511850f 193 if (getnameinfo(res->ai_addr, res->ai_addrlen,
fa70ef36
PA
194 hname, sizeof(hname), sname, sizeof(sname),
195 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
196 strlcpy(hname, "?", sizeof(hname));
197 strlcpy(sname, "?", sizeof(sname));
198 }
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PA
199 if (verbose && res0->ai_next) {
200 /* if we have multiple possibilities */
fa70ef36 201 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
eedc536d 202 }
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PA
203 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
204 if (s < 0) {
fa70ef36
PA
205 warn("Can't create socket for connection to `%s:%s'",
206 hname, sname);
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PA
207 continue;
208 }
0511850f 209 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
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210 close(s);
211 s = -1;
212 continue;
213 }
214
215 /* finally we got one */
216 break;
217 }
218 if (s < 0) {
fa70ef36 219 warnx("Can't connect to `%s:%s'", host, port);
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PA
220 code = -1;
221 freeaddrinfo(res0);
222 return 0;
223 }
224 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
225 hisctladdr.su_len = res->ai_addrlen;
226 freeaddrinfo(res0);
227 res0 = res = NULL;
228
229 len = hisctladdr.su_len;
230 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
fa70ef36
PA
231 warn("Can't determine my address of connection to `%s:%s'",
232 host, port);
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233 code = -1;
234 goto bad;
235 }
236 myctladdr.su_len = len;
237
238#ifdef IPTOS_LOWDELAY
239 if (hisctladdr.su_family == AF_INET) {
240 int tos = IPTOS_LOWDELAY;
241 if (setsockopt(s, IPPROTO_IP, IP_TOS,
242 (void *)&tos, sizeof(tos)) == -1) {
243 DWARN("setsockopt %s (ignored)",
244 "IPTOS_LOWDELAY");
245 }
246 }
247#endif
248 cin = fdopen(s, "r");
249 cout = fdopen(s, "w");
250 if (cin == NULL || cout == NULL) {
0511850f 251 warnx("Can't fdopen socket");
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252 if (cin)
253 (void)fclose(cin);
254 if (cout)
255 (void)fclose(cout);
256 code = -1;
257 goto bad;
258 }
259 if (verbose)
260 fprintf(ttyout, "Connected to %s.\n", hostname);
261 if (getreply(0) > 2) { /* read startup message from server */
262 if (cin)
263 (void)fclose(cin);
264 if (cout)
265 (void)fclose(cout);
266 code = -1;
267 goto bad;
268 }
269
270 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
271 (void *)&on, sizeof(on)) == -1) {
272 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
273 }
274
275 return (hostname);
276 bad:
277 (void)close(s);
278 return (NULL);
279}
280
281void
282cmdabort(int notused)
283{
284 int oerrno = errno;
285
286 sigint_raised = 1;
287 alarmtimer(0);
288 if (fromatty)
289 write(fileno(ttyout), "\n", 1);
290 abrtflag++;
291 if (ptflag)
292 siglongjmp(ptabort, 1);
293 errno = oerrno;
294}
295
296void
297cmdtimeout(int notused)
298{
299 int oerrno = errno;
300
301 alarmtimer(0);
302 if (fromatty)
303 write(fileno(ttyout), "\n", 1);
304 timeoutflag++;
305 if (ptflag)
306 siglongjmp(ptabort, 1);
307 errno = oerrno;
308}
309
310/*VARARGS*/
311int
312command(const char *fmt, ...)
313{
314 va_list ap;
315 int r;
316 sigfunc oldsigint;
317
318#ifndef NO_DEBUG
319 if (ftp_debug) {
320 fputs("---> ", ttyout);
321 va_start(ap, fmt);
322 if (strncmp("PASS ", fmt, 5) == 0)
323 fputs("PASS XXXX", ttyout);
324 else if (strncmp("ACCT ", fmt, 5) == 0)
325 fputs("ACCT XXXX", ttyout);
326 else
327 vfprintf(ttyout, fmt, ap);
328 va_end(ap);
329 putc('\n', ttyout);
330 }
331#endif
332 if (cout == NULL) {
0511850f 333 warnx("No control connection for command");
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PA
334 code = -1;
335 return (0);
336 }
337
338 abrtflag = 0;
339
340 oldsigint = xsignal(SIGINT, cmdabort);
341
342 va_start(ap, fmt);
343 vfprintf(cout, fmt, ap);
344 va_end(ap);
345 fputs("\r\n", cout);
346 (void)fflush(cout);
347 cpend = 1;
348 r = getreply(!strcmp(fmt, "QUIT"));
349 if (abrtflag && oldsigint != SIG_IGN)
350 (*oldsigint)(SIGINT);
351 (void)xsignal(SIGINT, oldsigint);
352 return (r);
353}
354
355static const char *m421[] = {
356 "remote server timed out. Connection closed",
357 "user interrupt. Connection closed",
358 "remote server has closed connection",
359};
360
361int
362getreply(int expecteof)
363{
364 char current_line[BUFSIZ]; /* last line of previous reply */
20e59a13 365 int c, n, lineno;
eedc536d
PA
366 int dig;
367 int originalcode = 0, continuation = 0;
368 sigfunc oldsigint, oldsigalrm;
369 int pflag = 0;
370 char *cp, *pt = pasv;
371
372 abrtflag = 0;
373 timeoutflag = 0;
374
375 oldsigint = xsignal(SIGINT, cmdabort);
376 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
377
20e59a13 378 for (lineno = 0 ;; lineno++) {
eedc536d
PA
379 dig = n = code = 0;
380 cp = current_line;
381 while (alarmtimer(quit_time ? quit_time : 60),
382 ((c = getc(cin)) != '\n')) {
383 if (c == IAC) { /* handle telnet commands */
384 switch (c = getc(cin)) {
385 case WILL:
386 case WONT:
387 c = getc(cin);
388 fprintf(cout, "%c%c%c", IAC, DONT, c);
389 (void)fflush(cout);
390 break;
391 case DO:
392 case DONT:
393 c = getc(cin);
394 fprintf(cout, "%c%c%c", IAC, WONT, c);
395 (void)fflush(cout);
396 break;
397 default:
398 break;
399 }
400 continue;
401 }
402 dig++;
403 if (c == EOF) {
404 /*
405 * these will get trashed by pswitch()
406 * in lostpeer()
407 */
408 int reply_timeoutflag = timeoutflag;
409 int reply_abrtflag = abrtflag;
410
411 alarmtimer(0);
412 if (expecteof && feof(cin)) {
413 (void)xsignal(SIGINT, oldsigint);
414 (void)xsignal(SIGALRM, oldsigalrm);
415 code = 221;
416 return (0);
417 }
418 cpend = 0;
419 lostpeer(0);
420 if (verbose) {
421 size_t midx;
422 if (reply_timeoutflag)
423 midx = 0;
424 else if (reply_abrtflag)
425 midx = 1;
426 else
427 midx = 2;
0511850f 428 (void)fprintf(ttyout,
eedc536d
PA
429 "421 Service not available, %s.\n", m421[midx]);
430 (void)fflush(ttyout);
431 }
432 code = 421;
433 (void)xsignal(SIGINT, oldsigint);
434 (void)xsignal(SIGALRM, oldsigalrm);
435 return (4);
436 }
437 if (c != '\r' && (verbose > 0 ||
438 ((verbose > -1 && n == '5' && dig > 4) &&
439 (((!n && c < '5') || (n && n < '5'))
440 || !retry_connect)))) {
441 if (proxflag &&
442 (dig == 1 || (dig == 5 && verbose == 0)))
443 fprintf(ttyout, "%s:", hostname);
444 (void)putc(c, ttyout);
445 }
446 if (dig < 4 && isdigit(c))
447 code = code * 10 + (c - '0');
448 if (!pflag && (code == 227 || code == 228))
449 pflag = 1;
450 else if (!pflag && code == 229)
451 pflag = 100;
452 if (dig > 4 && pflag == 1 && isdigit(c))
453 pflag = 2;
454 if (pflag == 2) {
455 if (c != '\r' && c != ')') {
456 if (pt < &pasv[sizeof(pasv) - 1])
457 *pt++ = c;
458 } else {
459 *pt = '\0';
460 pflag = 3;
461 }
462 }
463 if (pflag == 100 && c == '(')
464 pflag = 2;
465 if (dig == 4 && c == '-') {
466 if (continuation)
467 code = 0;
468 continuation++;
469 }
470 if (n == 0)
471 n = c;
472 if (cp < &current_line[sizeof(current_line) - 1])
473 *cp++ = c;
474 }
475 if (verbose > 0 || ((verbose > -1 && n == '5') &&
476 (n < '5' || !retry_connect))) {
477 (void)putc(c, ttyout);
0511850f 478 (void)fflush(ttyout);
eedc536d
PA
479 }
480 if (cp[-1] == '\r')
481 cp[-1] = '\0';
482 *cp = '\0';
20e59a13 483 if (lineno == 0)
eedc536d
PA
484 (void)strlcpy(reply_string, current_line,
485 sizeof(reply_string));
20e59a13 486 if (lineno > 0 && code == 0 && reply_callback != NULL)
eedc536d
PA
487 (*reply_callback)(current_line);
488 if (continuation && code != originalcode) {
489 if (originalcode == 0)
490 originalcode = code;
491 continue;
492 }
493 if (n != '1')
494 cpend = 0;
495 alarmtimer(0);
496 (void)xsignal(SIGINT, oldsigint);
497 (void)xsignal(SIGALRM, oldsigalrm);
498 if (code == 421 || originalcode == 421)
499 lostpeer(0);
500 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
501 (*oldsigint)(SIGINT);
502 if (timeoutflag && oldsigalrm != cmdtimeout &&
503 oldsigalrm != SIG_IGN)
504 (*oldsigalrm)(SIGINT);
505 return (n - '0');
506 }
507}
508
509static int
20e59a13 510empty(FILE *ecin, FILE *din, int sec)
eedc536d
PA
511{
512 int nr, nfd;
513 struct pollfd pfd[2];
514
515 nfd = 0;
20e59a13
PA
516 if (ecin) {
517 pfd[nfd].fd = fileno(ecin);
eedc536d
PA
518 pfd[nfd++].events = POLLIN;
519 }
520
521 if (din) {
522 pfd[nfd].fd = fileno(din);
523 pfd[nfd++].events = POLLIN;
524 }
525
526 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
527 return nr;
528
529 nr = 0;
530 nfd = 0;
20e59a13 531 if (ecin)
eedc536d
PA
532 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
533 if (din)
534 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
535 return nr;
536}
537
538sigjmp_buf xferabort;
539
540void
541abortxfer(int notused)
542{
543 char msgbuf[100];
544 size_t len;
545
546 sigint_raised = 1;
547 alarmtimer(0);
548 mflag = 0;
549 abrtflag = 0;
550 switch (direction[0]) {
551 case 'r':
552 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
553 break;
554 case 's':
555 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
556 break;
557 default:
0511850f 558 errx(1, "abortxfer: unknown direction `%s'", direction);
eedc536d
PA
559 }
560 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
561 sizeof(msgbuf));
562 write(fileno(ttyout), msgbuf, len);
563 siglongjmp(xferabort, 1);
564}
565
c106ca54
PA
566/*
567 * Read data from infd & write to outfd, using buf/bufsize as the temporary
568 * buffer, dealing with short writes.
569 * If rate_limit != 0, rate-limit the transfer.
570 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
571 * Updates global variables: bytes.
572 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
573 * In the case of error, errno contains the appropriate error code.
574 */
575static int
576copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
577 int rate_limit, int hash_interval)
578{
579 volatile off_t hashc;
580 ssize_t inc, outc;
581 char *bufp;
582 struct timeval tvthen, tvnow, tvdiff;
583 off_t bufrem, bufchunk;
584 int serr;
585
586 hashc = hash_interval;
587 if (rate_limit)
588 bufchunk = rate_limit;
589 else
590 bufchunk = bufsize;
591
592 while (1) {
593 if (rate_limit) {
594 (void)gettimeofday(&tvthen, NULL);
595 }
596 errno = 0;
597 inc = outc = 0;
598 /* copy bufchunk at a time */
599 bufrem = bufchunk;
600 while (bufrem > 0) {
20e59a13 601 inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
c106ca54
PA
602 if (inc <= 0)
603 goto copy_done;
604 bytes += inc;
605 bufrem -= inc;
606 bufp = buf;
607 while (inc > 0) {
608 outc = write(outfd, bufp, inc);
609 if (outc < 0)
610 goto copy_done;
611 inc -= outc;
612 bufp += outc;
613 }
614 if (hash_interval) {
615 while (bytes >= hashc) {
616 (void)putc('#', ttyout);
617 hashc += hash_interval;
618 }
619 (void)fflush(ttyout);
620 }
621 }
622 if (rate_limit) { /* rate limited; wait if necessary */
623 while (1) {
624 (void)gettimeofday(&tvnow, NULL);
625 timersub(&tvnow, &tvthen, &tvdiff);
626 if (tvdiff.tv_sec > 0)
627 break;
628 usleep(1000000 - tvdiff.tv_usec);
629 }
630 }
631 }
632
633 copy_done:
634 serr = errno;
635 if (hash_interval && bytes > 0) {
636 if (bytes < hash_interval)
637 (void)putc('#', ttyout);
638 (void)putc('\n', ttyout);
639 (void)fflush(ttyout);
640 }
641 errno = serr;
642 if (inc == -1)
643 return 1;
644 if (outc == -1)
645 return 2;
646
647 return 0;
648}
649
eedc536d
PA
650void
651sendrequest(const char *cmd, const char *local, const char *remote,
652 int printnames)
653{
654 struct stat st;
c106ca54 655 int c;
0511850f
PA
656 FILE *volatile fin;
657 FILE *volatile dout;
658 int (*volatile closefunc)(FILE *);
659 sigfunc volatile oldintr;
660 sigfunc volatile oldintp;
661 off_t volatile hashbytes;
c106ca54 662 int hash_interval;
20e59a13 663 const char *lmode;
eedc536d
PA
664 static size_t bufsize;
665 static char *buf;
666 int oprogress;
667
eedc536d
PA
668 hashbytes = mark;
669 direction = "sent";
670 dout = NULL;
671 bytes = 0;
672 filesize = -1;
673 oprogress = progress;
674 if (verbose && printnames) {
675 if (*local != '-')
676 fprintf(ttyout, "local: %s ", local);
677 if (remote)
678 fprintf(ttyout, "remote: %s\n", remote);
679 }
680 if (proxy) {
681 proxtrans(cmd, local, remote);
682 return;
683 }
684 if (curtype != type)
685 changetype(type, 0);
686 closefunc = NULL;
687 oldintr = NULL;
688 oldintp = NULL;
689 lmode = "w";
690 if (sigsetjmp(xferabort, 1)) {
691 while (cpend)
692 (void)getreply(0);
693 code = -1;
694 goto cleanupsend;
695 }
696 (void)xsignal(SIGQUIT, psummary);
697 oldintr = xsignal(SIGINT, abortxfer);
698 if (strcmp(local, "-") == 0) {
699 fin = stdin;
700 progress = 0;
701 } else if (*local == '|') {
702 oldintp = xsignal(SIGPIPE, SIG_IGN);
703 fin = popen(local + 1, "r");
704 if (fin == NULL) {
0511850f 705 warn("Can't execute `%s'", local + 1);
eedc536d
PA
706 code = -1;
707 goto cleanupsend;
708 }
709 progress = 0;
710 closefunc = pclose;
711 } else {
712 fin = fopen(local, "r");
713 if (fin == NULL) {
0511850f 714 warn("Can't open `%s'", local);
eedc536d
PA
715 code = -1;
716 goto cleanupsend;
717 }
718 closefunc = fclose;
719 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
720 fprintf(ttyout, "%s: not a plain file.\n", local);
721 code = -1;
722 goto cleanupsend;
723 }
724 filesize = st.st_size;
725 }
726 if (initconn()) {
727 code = -1;
728 goto cleanupsend;
729 }
730 if (sigsetjmp(xferabort, 1))
731 goto abort;
732
733 if (restart_point &&
734 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
735 int rc;
736
737 rc = -1;
738 switch (curtype) {
739 case TYPE_A:
740 rc = fseeko(fin, restart_point, SEEK_SET);
741 break;
742 case TYPE_I:
743 case TYPE_L:
744 rc = lseek(fileno(fin), restart_point, SEEK_SET);
745 break;
746 }
747 if (rc < 0) {
0511850f 748 warn("Can't seek to restart `%s'", local);
eedc536d
PA
749 goto cleanupsend;
750 }
751 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
752 goto cleanupsend;
753 lmode = "r+";
754 }
755 if (remote) {
756 if (command("%s %s", cmd, remote) != PRELIM)
757 goto cleanupsend;
758 } else {
759 if (command("%s", cmd) != PRELIM)
760 goto cleanupsend;
761 }
762 dirchange = 1;
763 dout = dataconn(lmode);
764 if (dout == NULL)
765 goto abort;
766
20e59a13 767 if ((size_t)sndbuf_size > bufsize) {
eedc536d
PA
768 if (buf)
769 (void)free(buf);
770 bufsize = sndbuf_size;
771 buf = ftp_malloc(bufsize);
772 }
773
774 progressmeter(-1);
775 oldintp = xsignal(SIGPIPE, SIG_IGN);
c106ca54 776 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
eedc536d
PA
777
778 switch (curtype) {
779
780 case TYPE_I:
781 case TYPE_L:
c106ca54
PA
782 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
783 rate_put, hash_interval);
784 if (c == 1) {
0511850f 785 warn("Reading `%s'", local);
c106ca54 786 } else if (c == 2) {
eedc536d 787 if (errno != EPIPE)
0511850f 788 warn("Writing to network");
eedc536d
PA
789 bytes = -1;
790 }
791 break;
792
793 case TYPE_A:
794 while ((c = getc(fin)) != EOF) {
795 if (c == '\n') {
c106ca54 796 while (hash_interval && bytes >= hashbytes) {
eedc536d
PA
797 (void)putc('#', ttyout);
798 (void)fflush(ttyout);
799 hashbytes += mark;
800 }
801 if (ferror(dout))
802 break;
803 (void)putc('\r', dout);
804 bytes++;
805 }
806 (void)putc(c, dout);
807 bytes++;
20e59a13 808#if 0 /* this violates RFC 959 */
eedc536d
PA
809 if (c == '\r') {
810 (void)putc('\0', dout);
811 bytes++;
812 }
813#endif
814 }
c106ca54 815 if (hash_interval) {
eedc536d
PA
816 if (bytes < hashbytes)
817 (void)putc('#', ttyout);
818 (void)putc('\n', ttyout);
819 }
820 if (ferror(fin))
0511850f 821 warn("Reading `%s'", local);
eedc536d
PA
822 if (ferror(dout)) {
823 if (errno != EPIPE)
0511850f 824 warn("Writing to network");
eedc536d
PA
825 bytes = -1;
826 }
827 break;
828 }
829
830 progressmeter(1);
831 if (closefunc != NULL) {
832 (*closefunc)(fin);
833 fin = NULL;
834 }
835 (void)fclose(dout);
836 dout = NULL;
837 (void)getreply(0);
838 if (bytes > 0)
839 ptransfer(0);
840 goto cleanupsend;
841
842 abort:
843 (void)xsignal(SIGINT, oldintr);
844 oldintr = NULL;
845 if (!cpend) {
846 code = -1;
847 goto cleanupsend;
848 }
849 if (data >= 0) {
850 (void)close(data);
851 data = -1;
852 }
853 if (dout) {
854 (void)fclose(dout);
855 dout = NULL;
856 }
857 (void)getreply(0);
858 code = -1;
859 if (bytes > 0)
860 ptransfer(0);
861
862 cleanupsend:
863 if (oldintr)
864 (void)xsignal(SIGINT, oldintr);
865 if (oldintp)
866 (void)xsignal(SIGPIPE, oldintp);
867 if (data >= 0) {
868 (void)close(data);
869 data = -1;
870 }
871 if (closefunc != NULL && fin != NULL)
872 (*closefunc)(fin);
873 if (dout)
874 (void)fclose(dout);
875 progress = oprogress;
876 restart_point = 0;
877 bytes = 0;
878}
879
880void
0511850f 881recvrequest(const char *cmd, const char *volatile local, const char *remote,
eedc536d
PA
882 const char *lmode, int printnames, int ignorespecial)
883{
0511850f
PA
884 FILE *volatile fout;
885 FILE *volatile din;
886 int (*volatile closefunc)(FILE *);
887 sigfunc volatile oldintr;
888 sigfunc volatile oldintp;
eedc536d 889 int c, d;
0511850f
PA
890 int volatile is_retr;
891 int volatile tcrflag;
892 int volatile bare_lfs;
eedc536d
PA
893 static size_t bufsize;
894 static char *buf;
0511850f 895 off_t volatile hashbytes;
c106ca54 896 int hash_interval;
eedc536d
PA
897 struct stat st;
898 time_t mtime;
899 struct timeval tval[2];
900 int oprogress;
901 int opreserve;
902
eedc536d
PA
903 fout = NULL;
904 din = NULL;
905 hashbytes = mark;
906 direction = "received";
907 bytes = 0;
908 bare_lfs = 0;
909 filesize = -1;
910 oprogress = progress;
911 opreserve = preserve;
912 is_retr = (strcmp(cmd, "RETR") == 0);
913 if (is_retr && verbose && printnames) {
914 if (ignorespecial || *local != '-')
915 fprintf(ttyout, "local: %s ", local);
916 if (remote)
917 fprintf(ttyout, "remote: %s\n", remote);
918 }
919 if (proxy && is_retr) {
920 proxtrans(cmd, local, remote);
921 return;
922 }
923 closefunc = NULL;
924 oldintr = NULL;
925 oldintp = NULL;
926 tcrflag = !crflag && is_retr;
927 if (sigsetjmp(xferabort, 1)) {
928 while (cpend)
929 (void)getreply(0);
930 code = -1;
931 goto cleanuprecv;
932 }
933 (void)xsignal(SIGQUIT, psummary);
934 oldintr = xsignal(SIGINT, abortxfer);
935 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
936 if (access(local, W_OK) < 0) {
937 char *dir = strrchr(local, '/');
938
939 if (errno != ENOENT && errno != EACCES) {
0511850f 940 warn("Can't access `%s'", local);
eedc536d
PA
941 code = -1;
942 goto cleanuprecv;
943 }
944 if (dir != NULL)
945 *dir = 0;
946 d = access(dir == local ? "/" :
947 dir ? local : ".", W_OK);
948 if (dir != NULL)
949 *dir = '/';
950 if (d < 0) {
0511850f 951 warn("Can't access `%s'", local);
eedc536d
PA
952 code = -1;
953 goto cleanuprecv;
954 }
955 if (!runique && errno == EACCES &&
956 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
0511850f 957 warn("Can't chmod `%s'", local);
eedc536d
PA
958 code = -1;
959 goto cleanuprecv;
960 }
961 if (runique && errno == EACCES &&
962 (local = gunique(local)) == NULL) {
963 code = -1;
964 goto cleanuprecv;
965 }
966 }
967 else if (runique && (local = gunique(local)) == NULL) {
968 code = -1;
969 goto cleanuprecv;
970 }
971 }
972 if (!is_retr) {
973 if (curtype != TYPE_A)
974 changetype(TYPE_A, 0);
975 } else {
976 if (curtype != type)
977 changetype(type, 0);
978 filesize = remotesize(remote, 0);
979 if (code == 421 || code == -1)
980 goto cleanuprecv;
981 }
982 if (initconn()) {
983 code = -1;
984 goto cleanuprecv;
985 }
986 if (sigsetjmp(xferabort, 1))
987 goto abort;
988 if (is_retr && restart_point &&
989 command("REST " LLF, (LLT) restart_point) != CONTINUE)
990 goto cleanuprecv;
991 if (! EMPTYSTRING(remote)) {
992 if (command("%s %s", cmd, remote) != PRELIM)
993 goto cleanuprecv;
994 } else {
995 if (command("%s", cmd) != PRELIM)
996 goto cleanuprecv;
997 }
998 din = dataconn("r");
999 if (din == NULL)
1000 goto abort;
1001 if (!ignorespecial && strcmp(local, "-") == 0) {
1002 fout = stdout;
1003 progress = 0;
1004 preserve = 0;
1005 } else if (!ignorespecial && *local == '|') {
1006 oldintp = xsignal(SIGPIPE, SIG_IGN);
1007 fout = popen(local + 1, "w");
1008 if (fout == NULL) {
0511850f 1009 warn("Can't execute `%s'", local+1);
eedc536d
PA
1010 goto abort;
1011 }
1012 progress = 0;
1013 preserve = 0;
1014 closefunc = pclose;
1015 } else {
1016 fout = fopen(local, lmode);
1017 if (fout == NULL) {
0511850f 1018 warn("Can't open `%s'", local);
eedc536d
PA
1019 goto abort;
1020 }
1021 closefunc = fclose;
1022 }
1023
1024 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1025 progress = 0;
1026 preserve = 0;
1027 }
20e59a13 1028 if ((size_t)rcvbuf_size > bufsize) {
eedc536d
PA
1029 if (buf)
1030 (void)free(buf);
1031 bufsize = rcvbuf_size;
1032 buf = ftp_malloc(bufsize);
1033 }
1034
1035 progressmeter(-1);
c106ca54 1036 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
eedc536d
PA
1037
1038 switch (curtype) {
1039
1040 case TYPE_I:
1041 case TYPE_L:
1042 if (is_retr && restart_point &&
1043 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
0511850f 1044 warn("Can't seek to restart `%s'", local);
eedc536d
PA
1045 goto cleanuprecv;
1046 }
c106ca54
PA
1047 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1048 rate_get, hash_interval);
1049 if (c == 1) {
eedc536d 1050 if (errno != EPIPE)
0511850f 1051 warn("Reading from network");
eedc536d 1052 bytes = -1;
c106ca54
PA
1053 } else if (c == 2) {
1054 warn("Writing `%s'", local);
eedc536d
PA
1055 }
1056 break;
1057
1058 case TYPE_A:
1059 if (is_retr && restart_point) {
1060 int ch;
1061 off_t i;
1062
1063 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1064 goto done;
1065 for (i = 0; i++ < restart_point;) {
1066 if ((ch = getc(fout)) == EOF)
1067 goto done;
1068 if (ch == '\n')
1069 i++;
1070 }
1071 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1072 done:
0511850f 1073 warn("Can't seek to restart `%s'", local);
eedc536d
PA
1074 goto cleanuprecv;
1075 }
1076 }
1077 while ((c = getc(din)) != EOF) {
1078 if (c == '\n')
1079 bare_lfs++;
1080 while (c == '\r') {
c106ca54 1081 while (hash_interval && bytes >= hashbytes) {
eedc536d
PA
1082 (void)putc('#', ttyout);
1083 (void)fflush(ttyout);
1084 hashbytes += mark;
1085 }
1086 bytes++;
1087 if ((c = getc(din)) != '\n' || tcrflag) {
1088 if (ferror(fout))
1089 goto break2;
1090 (void)putc('\r', fout);
1091 if (c == '\0') {
1092 bytes++;
1093 goto contin2;
1094 }
1095 if (c == EOF)
1096 goto contin2;
1097 }
1098 }
1099 (void)putc(c, fout);
1100 bytes++;
1101 contin2: ;
1102 }
1103 break2:
c106ca54 1104 if (hash_interval) {
eedc536d
PA
1105 if (bytes < hashbytes)
1106 (void)putc('#', ttyout);
1107 (void)putc('\n', ttyout);
1108 }
1109 if (ferror(din)) {
1110 if (errno != EPIPE)
0511850f 1111 warn("Reading from network");
eedc536d
PA
1112 bytes = -1;
1113 }
1114 if (ferror(fout))
0511850f 1115 warn("Writing `%s'", local);
eedc536d
PA
1116 break;
1117 }
1118
1119 progressmeter(1);
1120 if (closefunc != NULL) {
1121 (*closefunc)(fout);
1122 fout = NULL;
1123 }
1124 (void)fclose(din);
1125 din = NULL;
1126 (void)getreply(0);
1127 if (bare_lfs) {
1128 fprintf(ttyout,
1129 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1130 bare_lfs);
1131 fputs("File may not have transferred correctly.\n", ttyout);
1132 }
1133 if (bytes >= 0 && is_retr) {
1134 if (bytes > 0)
1135 ptransfer(0);
1136 if (preserve && (closefunc == fclose)) {
1137 mtime = remotemodtime(remote, 0);
1138 if (mtime != -1) {
1139 (void)gettimeofday(&tval[0], NULL);
1140 tval[1].tv_sec = mtime;
1141 tval[1].tv_usec = 0;
1142 if (utimes(local, tval) == -1) {
1143 fprintf(ttyout,
1144 "Can't change modification time on %s to %s",
c106ca54
PA
1145 local,
1146 rfc2822time(localtime(&mtime)));
eedc536d
PA
1147 }
1148 }
1149 }
1150 }
1151 goto cleanuprecv;
1152
1153 abort:
1154 /*
20e59a13 1155 * abort using RFC 959 recommended IP,SYNC sequence
eedc536d
PA
1156 */
1157 if (! sigsetjmp(xferabort, 1)) {
1158 /* this is the first call */
1159 (void)xsignal(SIGINT, abort_squared);
1160 if (!cpend) {
1161 code = -1;
1162 goto cleanuprecv;
1163 }
1164 abort_remote(din);
1165 }
1166 code = -1;
1167 if (bytes > 0)
1168 ptransfer(0);
1169
1170 cleanuprecv:
1171 if (oldintr)
1172 (void)xsignal(SIGINT, oldintr);
1173 if (oldintp)
1174 (void)xsignal(SIGPIPE, oldintp);
1175 if (data >= 0) {
1176 (void)close(data);
1177 data = -1;
1178 }
1179 if (closefunc != NULL && fout != NULL)
1180 (*closefunc)(fout);
1181 if (din)
1182 (void)fclose(din);
1183 progress = oprogress;
1184 preserve = opreserve;
1185 bytes = 0;
1186}
1187
1188/*
1189 * Need to start a listen on the data channel before we send the command,
1190 * otherwise the server's connect may fail.
1191 */
1192int
1193initconn(void)
1194{
1195 char *p, *a;
1196 int result, tmpno = 0;
1197 int on = 1;
1198 int error;
1199 unsigned int addr[16], port[2];
1200 unsigned int af, hal, pal;
1201 socklen_t len;
20e59a13 1202 const char *pasvcmd = NULL;
0511850f 1203 int overbose;
eedc536d
PA
1204
1205#ifdef INET6
1206#ifndef NO_DEBUG
1207 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1208 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1209 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
0511850f 1210 warnx("Use of scoped addresses can be troublesome");
eedc536d
PA
1211 }
1212#endif
1213#endif
0511850f 1214
eedc536d
PA
1215 reinit:
1216 if (passivemode) {
1217 data_addr = myctladdr;
1218 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1219 if (data < 0) {
0511850f 1220 warn("Can't create socket for data connection");
eedc536d
PA
1221 return (1);
1222 }
1223 if ((options & SO_DEBUG) &&
1224 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1225 (void *)&on, sizeof(on)) == -1) {
1226 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1227 }
1228 result = COMPLETE + 1;
1229 switch (data_addr.su_family) {
1230 case AF_INET:
1231 if (epsv4 && !epsv4bad) {
1232 pasvcmd = "EPSV";
0511850f
PA
1233 overbose = verbose;
1234 if (ftp_debug == 0)
1235 verbose = -1;
eedc536d 1236 result = command("EPSV");
0511850f
PA
1237 verbose = overbose;
1238 if (verbose > 0 &&
1239 (result == COMPLETE || !connected))
1240 fprintf(ttyout, "%s\n", reply_string);
eedc536d
PA
1241 if (!connected)
1242 return (1);
1243 /*
1244 * this code is to be friendly with broken
1245 * BSDI ftpd
1246 */
1247 if (code / 10 == 22 && code != 229) {
1248 fputs(
1249"wrong server: return code must be 229\n",
1250 ttyout);
1251 result = COMPLETE + 1;
1252 }
1253 if (result != COMPLETE) {
1254 epsv4bad = 1;
1255 DPRINTF("disabling epsv4 for this "
1256 "connection\n");
1257 }
1258 }
1259 if (result != COMPLETE) {
1260 pasvcmd = "PASV";
1261 result = command("PASV");
1262 if (!connected)
1263 return (1);
1264 }
1265 break;
1266#ifdef INET6
1267 case AF_INET6:
fa70ef36
PA
1268 if (epsv6 && !epsv6bad) {
1269 pasvcmd = "EPSV";
1270 overbose = verbose;
1271 if (ftp_debug == 0)
1272 verbose = -1;
1273 result = command("EPSV");
1274 verbose = overbose;
1275 if (verbose > 0 &&
1276 (result == COMPLETE || !connected))
1277 fprintf(ttyout, "%s\n", reply_string);
1278 if (!connected)
1279 return (1);
1280 /*
1281 * this code is to be friendly with
1282 * broken BSDI ftpd
1283 */
1284 if (code / 10 == 22 && code != 229) {
1285 fputs(
1286 "wrong server: return code must be 229\n",
1287 ttyout);
1288 result = COMPLETE + 1;
1289 }
1290 if (result != COMPLETE) {
1291 epsv6bad = 1;
1292 DPRINTF("disabling epsv6 for this "
1293 "connection\n");
1294 }
eedc536d
PA
1295 }
1296 if (result != COMPLETE) {
1297 pasvcmd = "LPSV";
1298 result = command("LPSV");
1299 }
1300 if (!connected)
1301 return (1);
1302 break;
1303#endif
1304 default:
1305 result = COMPLETE + 1;
1306 break;
1307 }
1308 if (result != COMPLETE) {
1309 if (activefallback) {
1310 (void)close(data);
1311 data = -1;
1312 passivemode = 0;
1313#if 0
1314 activefallback = 0;
1315#endif
1316 goto reinit;
1317 }
1318 fputs("Passive mode refused.\n", ttyout);
1319 goto bad;
1320 }
1321
1322#define pack2(var, off) \
1323 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1324#define pack4(var, off) \
1325 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1326 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1327#define UC(b) (((int)b)&0xff)
1328
1329 /*
1330 * What we've got at this point is a string of comma separated
1331 * one-byte unsigned integer values, separated by commas.
1332 */
1333 if (strcmp(pasvcmd, "PASV") == 0) {
1334 if (data_addr.su_family != AF_INET) {
1335 fputs(
1336 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1337 error = 1;
1338 goto bad;
1339 }
1340 if (code / 10 == 22 && code != 227) {
1341 fputs("wrong server: return code must be 227\n",
1342 ttyout);
1343 error = 1;
1344 goto bad;
1345 }
1346 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1347 &addr[0], &addr[1], &addr[2], &addr[3],
1348 &port[0], &port[1]);
1349 if (error != 6) {
1350 fputs(
1351"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1352 error = 1;
1353 goto bad;
1354 }
1355 error = 0;
1356 memset(&data_addr, 0, sizeof(data_addr));
1357 data_addr.su_family = AF_INET;
1358 data_addr.su_len = sizeof(struct sockaddr_in);
1359 data_addr.si_su.su_sin.sin_addr.s_addr =
1360 htonl(pack4(addr, 0));
1361 data_addr.su_port = htons(pack2(port, 0));
1362 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1363 if (code / 10 == 22 && code != 228) {
1364 fputs("wrong server: return code must be 228\n",
1365 ttyout);
1366 error = 1;
1367 goto bad;
1368 }
1369 switch (data_addr.su_family) {
1370 case AF_INET:
1371 error = sscanf(pasv,
1372"%u,%u,%u,%u,%u,%u,%u,%u,%u",
1373 &af, &hal,
1374 &addr[0], &addr[1], &addr[2], &addr[3],
1375 &pal, &port[0], &port[1]);
1376 if (error != 9) {
1377 fputs(
1378"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1379 error = 1;
1380 goto bad;
1381 }
1382 if (af != 4 || hal != 4 || pal != 2) {
1383 fputs(
1384"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1385 error = 1;
1386 goto bad;
1387 }
1388
1389 error = 0;
1390 memset(&data_addr, 0, sizeof(data_addr));
1391 data_addr.su_family = AF_INET;
1392 data_addr.su_len = sizeof(struct sockaddr_in);
1393 data_addr.si_su.su_sin.sin_addr.s_addr =
1394 htonl(pack4(addr, 0));
1395 data_addr.su_port = htons(pack2(port, 0));
1396 break;
1397#ifdef INET6
1398 case AF_INET6:
1399 error = sscanf(pasv,
1400"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1401 &af, &hal,
1402 &addr[0], &addr[1], &addr[2], &addr[3],
1403 &addr[4], &addr[5], &addr[6], &addr[7],
1404 &addr[8], &addr[9], &addr[10],
1405 &addr[11], &addr[12], &addr[13],
1406 &addr[14], &addr[15],
1407 &pal, &port[0], &port[1]);
1408 if (error != 21) {
1409 fputs(
1410"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1411 error = 1;
1412 goto bad;
1413 }
1414 if (af != 6 || hal != 16 || pal != 2) {
1415 fputs(
1416"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1417 error = 1;
1418 goto bad;
1419 }
1420
1421 error = 0;
1422 memset(&data_addr, 0, sizeof(data_addr));
1423 data_addr.su_family = AF_INET6;
1424 data_addr.su_len = sizeof(struct sockaddr_in6);
1425 {
20e59a13 1426 size_t i;
eedc536d
PA
1427 for (i = 0; i < sizeof(struct in6_addr); i++) {
1428 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1429 UC(addr[i]);
1430 }
1431 }
1432 data_addr.su_port = htons(pack2(port, 0));
1433 break;
1434#endif
1435 default:
1436 error = 1;
1437 }
1438 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1439 char delim[4];
1440
1441 port[0] = 0;
1442 if (code / 10 == 22 && code != 229) {
1443 fputs("wrong server: return code must be 229\n",
1444 ttyout);
1445 error = 1;
1446 goto bad;
1447 }
1448 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1449 &delim[1], &delim[2], &port[1],
1450 &delim[3]) != 5) {
1451 fputs("parse error!\n", ttyout);
1452 error = 1;
1453 goto bad;
1454 }
1455 if (delim[0] != delim[1] || delim[0] != delim[2]
1456 || delim[0] != delim[3]) {
1457 fputs("parse error!\n", ttyout);
1458 error = 1;
1459 goto bad;
1460 }
1461 data_addr = hisctladdr;
1462 data_addr.su_port = htons(port[1]);
1463 } else
1464 goto bad;
1465
0511850f
PA
1466 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
1467 data_addr.su_len) < 0) {
eedc536d
PA
1468 if (activefallback) {
1469 (void)close(data);
1470 data = -1;
1471 passivemode = 0;
1472#if 0
1473 activefallback = 0;
1474#endif
1475 goto reinit;
1476 }
eedc536d
PA
1477 goto bad;
1478 }
1479#ifdef IPTOS_THROUGHPUT
1480 if (data_addr.su_family == AF_INET) {
1481 on = IPTOS_THROUGHPUT;
1482 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1483 (void *)&on, sizeof(on)) == -1) {
1484 DWARN("setsockopt %s (ignored)",
1485 "IPTOS_THROUGHPUT");
1486 }
1487 }
1488#endif
1489 return (0);
1490 }
1491
1492 noport:
1493 data_addr = myctladdr;
1494 if (sendport)
1495 data_addr.su_port = 0; /* let system pick one */
1496 if (data != -1)
1497 (void)close(data);
1498 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1499 if (data < 0) {
0511850f 1500 warn("Can't create socket for data connection");
eedc536d
PA
1501 if (tmpno)
1502 sendport = 1;
1503 return (1);
1504 }
1505 if (!sendport)
1506 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1507 (void *)&on, sizeof(on)) == -1) {
0511850f 1508 warn("Can't set SO_REUSEADDR on data connection");
eedc536d
PA
1509 goto bad;
1510 }
1511 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1512 data_addr.su_len) < 0) {
0511850f 1513 warn("Can't bind for data connection");
eedc536d
PA
1514 goto bad;
1515 }
1516 if ((options & SO_DEBUG) &&
1517 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1518 (void *)&on, sizeof(on)) == -1) {
1519 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1520 }
1521 len = sizeof(data_addr.si_su);
1522 memset((char *)&data_addr, 0, sizeof (data_addr));
1523 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
0511850f 1524 warn("Can't determine my address of data connection");
eedc536d
PA
1525 goto bad;
1526 }
1527 data_addr.su_len = len;
1528 if (ftp_listen(data, 1) < 0)
0511850f 1529 warn("Can't listen to data connection");
eedc536d
PA
1530
1531 if (sendport) {
1532 char hname[NI_MAXHOST], sname[NI_MAXSERV];
eedc536d
PA
1533 struct sockinet tmp;
1534
1535 switch (data_addr.su_family) {
1536 case AF_INET:
1537 if (!epsv4 || epsv4bad) {
1538 result = COMPLETE + 1;
1539 break;
1540 }
1541 /* FALLTHROUGH */
1542#ifdef INET6
1543 case AF_INET6:
fa70ef36
PA
1544 if (!epsv6 || epsv6bad) {
1545 result = COMPLETE + 1;
1546 break;
1547 }
eedc536d
PA
1548#endif
1549 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1550 tmp = data_addr;
1551#ifdef INET6
1552 if (tmp.su_family == AF_INET6)
1553 tmp.si_su.su_sin6.sin6_scope_id = 0;
1554#endif
1555 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1556 tmp.su_len, hname, sizeof(hname), sname,
1557 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1558 result = ERROR;
1559 } else {
0511850f
PA
1560 overbose = verbose;
1561 if (ftp_debug == 0)
1562 verbose = -1;
20e59a13 1563 result = command("EPRT |%u|%s|%s|", af, hname,
eedc536d 1564 sname);
0511850f
PA
1565 verbose = overbose;
1566 if (verbose > 0 &&
1567 (result == COMPLETE || !connected))
1568 fprintf(ttyout, "%s\n", reply_string);
eedc536d
PA
1569 if (!connected)
1570 return (1);
1571 if (result != COMPLETE) {
1572 epsv4bad = 1;
1573 DPRINTF("disabling epsv4 for this "
1574 "connection\n");
1575 }
1576 }
1577 break;
1578 default:
1579 result = COMPLETE + 1;
1580 break;
1581 }
1582 if (result == COMPLETE)
1583 goto skip_port;
1584
1585 switch (data_addr.su_family) {
1586 case AF_INET:
1587 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1588 p = (char *)&data_addr.su_port;
1589 result = command("PORT %d,%d,%d,%d,%d,%d",
1590 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1591 UC(p[0]), UC(p[1]));
1592 break;
1593#ifdef INET6
1594 case AF_INET6:
1595 a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
1596 p = (char *)&data_addr.su_port;
1597 result = command(
1598 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1599 6, 16,
1600 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
1601 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
1602 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
1603 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
1604 2, UC(p[0]), UC(p[1]));
1605 break;
1606#endif
1607 default:
1608 result = COMPLETE + 1; /* xxx */
1609 }
1610 if (!connected)
1611 return (1);
1612 skip_port:
1613
1614 if (result == ERROR && sendport == -1) {
1615 sendport = 0;
1616 tmpno = 1;
1617 goto noport;
1618 }
1619 return (result != COMPLETE);
1620 }
1621 if (tmpno)
1622 sendport = 1;
1623#ifdef IPTOS_THROUGHPUT
1624 if (data_addr.su_family == AF_INET) {
1625 on = IPTOS_THROUGHPUT;
1626 if (setsockopt(data, IPPROTO_IP, IP_TOS,
20e59a13 1627 (void *)&on, sizeof(on)) == -1) {
eedc536d 1628 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
20e59a13 1629 }
eedc536d
PA
1630 }
1631#endif
1632 return (0);
1633 bad:
1634 (void)close(data);
1635 data = -1;
1636 if (tmpno)
1637 sendport = 1;
1638 return (1);
1639}
1640
1641FILE *
1642dataconn(const char *lmode)
1643{
1644 struct sockinet from;
1645 int s, flags, rv, timeout;
1646 struct timeval endtime, now, td;
1647 struct pollfd pfd[1];
1648 socklen_t fromlen;
1649
1650 if (passivemode) /* passive data connection */
1651 return (fdopen(data, lmode));
1652
1653 /* active mode data connection */
1654
1655 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1656 goto dataconn_failed; /* get current socket flags */
1657 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1658 goto dataconn_failed; /* set non-blocking connect */
1659
1660 /* NOTE: we now must restore socket flags on successful exit */
1661
1662 /* limit time waiting on listening socket */
1663 pfd[0].fd = data;
1664 pfd[0].events = POLLIN;
1665 (void)gettimeofday(&endtime, NULL); /* determine end time */
1666 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1667 /* without -q, default to 60s */
1668 do {
1669 (void)gettimeofday(&now, NULL);
1670 timersub(&endtime, &now, &td);
1671 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1672 if (timeout < 0)
1673 timeout = 0;
1674 rv = ftp_poll(pfd, 1, timeout);
1675 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1676 if (rv == -1) {
0511850f 1677 warn("Can't poll waiting before accept");
eedc536d
PA
1678 goto dataconn_failed;
1679 }
1680 if (rv == 0) {
0511850f 1681 warnx("Poll timeout waiting before accept");
eedc536d
PA
1682 goto dataconn_failed;
1683 }
1684
1685 /* (non-blocking) accept the connection */
1686 fromlen = myctladdr.su_len;
1687 do {
1688 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1689 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1690 if (s == -1) {
0511850f 1691 warn("Can't accept data connection");
eedc536d
PA
1692 goto dataconn_failed;
1693 }
1694
1695 (void)close(data);
1696 data = s;
1697 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1698 goto dataconn_failed;
1699
1700#ifdef IPTOS_THROUGHPUT
1701 if (from.su_family == AF_INET) {
1702 int tos = IPTOS_THROUGHPUT;
1703 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1704 (void *)&tos, sizeof(tos)) == -1) {
1705 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1706 }
1707 }
1708#endif
1709 return (fdopen(data, lmode));
1710
1711 dataconn_failed:
1712 (void)close(data);
1713 data = -1;
1714 return (NULL);
1715}
1716
1717void
1718psabort(int notused)
1719{
1720 int oerrno = errno;
1721
1722 sigint_raised = 1;
1723 alarmtimer(0);
1724 abrtflag++;
1725 errno = oerrno;
1726}
1727
1728void
1729pswitch(int flag)
1730{
1731 sigfunc oldintr;
1732 static struct comvars {
1733 int connect;
1734 char name[MAXHOSTNAMELEN];
1735 struct sockinet mctl;
1736 struct sockinet hctl;
1737 FILE *in;
1738 FILE *out;
1739 int tpe;
1740 int curtpe;
1741 int cpnd;
1742 int sunqe;
1743 int runqe;
1744 int mcse;
1745 int ntflg;
1746 char nti[17];
1747 char nto[17];
1748 int mapflg;
1749 char mi[MAXPATHLEN];
1750 char mo[MAXPATHLEN];
1751 } proxstruct, tmpstruct;
1752 struct comvars *ip, *op;
1753
1754 abrtflag = 0;
1755 oldintr = xsignal(SIGINT, psabort);
1756 if (flag) {
1757 if (proxy)
1758 return;
1759 ip = &tmpstruct;
1760 op = &proxstruct;
1761 proxy++;
1762 } else {
1763 if (!proxy)
1764 return;
1765 ip = &proxstruct;
1766 op = &tmpstruct;
1767 proxy = 0;
1768 }
1769 ip->connect = connected;
1770 connected = op->connect;
1771 if (hostname)
1772 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1773 else
1774 ip->name[0] = '\0';
1775 hostname = op->name;
1776 ip->hctl = hisctladdr;
1777 hisctladdr = op->hctl;
1778 ip->mctl = myctladdr;
1779 myctladdr = op->mctl;
1780 ip->in = cin;
1781 cin = op->in;
1782 ip->out = cout;
1783 cout = op->out;
1784 ip->tpe = type;
1785 type = op->tpe;
1786 ip->curtpe = curtype;
1787 curtype = op->curtpe;
1788 ip->cpnd = cpend;
1789 cpend = op->cpnd;
1790 ip->sunqe = sunique;
1791 sunique = op->sunqe;
1792 ip->runqe = runique;
1793 runique = op->runqe;
1794 ip->mcse = mcase;
1795 mcase = op->mcse;
1796 ip->ntflg = ntflag;
1797 ntflag = op->ntflg;
1798 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1799 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1800 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1801 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1802 ip->mapflg = mapflag;
1803 mapflag = op->mapflg;
1804 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1805 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1806 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1807 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1808 (void)xsignal(SIGINT, oldintr);
1809 if (abrtflag) {
1810 abrtflag = 0;
1811 (*oldintr)(SIGINT);
1812 }
1813}
1814
1815void
1816abortpt(int notused)
1817{
1818
1819 sigint_raised = 1;
1820 alarmtimer(0);
1821 if (fromatty)
1822 write(fileno(ttyout), "\n", 1);
1823 ptabflg++;
1824 mflag = 0;
1825 abrtflag = 0;
1826 siglongjmp(ptabort, 1);
1827}
1828
1829void
1830proxtrans(const char *cmd, const char *local, const char *remote)
1831{
0511850f 1832 sigfunc volatile oldintr;
eedc536d 1833 int prox_type, nfnd;
0511850f 1834 int volatile secndflag;
20e59a13 1835 const char *volatile cmd2;
eedc536d
PA
1836
1837 oldintr = NULL;
1838 secndflag = 0;
1839 if (strcmp(cmd, "RETR"))
1840 cmd2 = "RETR";
1841 else
1842 cmd2 = runique ? "STOU" : "STOR";
1843 if ((prox_type = type) == 0) {
1844 if (unix_server && unix_proxy)
1845 prox_type = TYPE_I;
1846 else
1847 prox_type = TYPE_A;
1848 }
1849 if (curtype != prox_type)
1850 changetype(prox_type, 1);
1851 if (command("PASV") != COMPLETE) {
1852 fputs("proxy server does not support third party transfers.\n",
1853 ttyout);
1854 return;
1855 }
1856 pswitch(0);
1857 if (!connected) {
1858 fputs("No primary connection.\n", ttyout);
1859 pswitch(1);
1860 code = -1;
1861 return;
1862 }
1863 if (curtype != prox_type)
1864 changetype(prox_type, 1);
1865 if (command("PORT %s", pasv) != COMPLETE) {
1866 pswitch(1);
1867 return;
1868 }
1869 if (sigsetjmp(ptabort, 1))
1870 goto abort;
1871 oldintr = xsignal(SIGINT, abortpt);
1872 if ((restart_point &&
1873 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1874 || (command("%s %s", cmd, remote) != PRELIM)) {
1875 (void)xsignal(SIGINT, oldintr);
1876 pswitch(1);
1877 return;
1878 }
1879 sleep(2);
1880 pswitch(1);
1881 secndflag++;
1882 if ((restart_point &&
1883 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1884 || (command("%s %s", cmd2, local) != PRELIM))
1885 goto abort;
1886 ptflag++;
1887 (void)getreply(0);
1888 pswitch(0);
1889 (void)getreply(0);
1890 (void)xsignal(SIGINT, oldintr);
1891 pswitch(1);
1892 ptflag = 0;
1893 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1894 return;
1895 abort:
1896 if (sigsetjmp(xferabort, 1)) {
1897 (void)xsignal(SIGINT, oldintr);
1898 return;
1899 }
1900 (void)xsignal(SIGINT, abort_squared);
1901 ptflag = 0;
1902 if (strcmp(cmd, "RETR") && !proxy)
1903 pswitch(1);
1904 else if (!strcmp(cmd, "RETR") && proxy)
1905 pswitch(0);
1906 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1907 if (command("%s %s", cmd2, local) != PRELIM) {
1908 pswitch(0);
1909 if (cpend)
1910 abort_remote(NULL);
1911 }
1912 pswitch(1);
1913 if (ptabflg)
1914 code = -1;
1915 (void)xsignal(SIGINT, oldintr);
1916 return;
1917 }
1918 if (cpend)
1919 abort_remote(NULL);
1920 pswitch(!proxy);
1921 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1922 if (command("%s %s", cmd2, local) != PRELIM) {
1923 pswitch(0);
1924 if (cpend)
1925 abort_remote(NULL);
1926 pswitch(1);
1927 if (ptabflg)
1928 code = -1;
1929 (void)xsignal(SIGINT, oldintr);
1930 return;
1931 }
1932 }
1933 if (cpend)
1934 abort_remote(NULL);
1935 pswitch(!proxy);
1936 if (cpend) {
1937 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1938 if (nfnd < 0)
0511850f 1939 warn("Error aborting proxy command");
eedc536d
PA
1940 if (ptabflg)
1941 code = -1;
1942 lostpeer(0);
1943 }
1944 (void)getreply(0);
1945 (void)getreply(0);
1946 }
1947 if (proxy)
1948 pswitch(0);
1949 pswitch(1);
1950 if (ptabflg)
1951 code = -1;
1952 (void)xsignal(SIGINT, oldintr);
1953}
1954
1955void
1956reset(int argc, char *argv[])
1957{
1958 int nfnd = 1;
1959
1960 if (argc == 0 && argv != NULL) {
1961 UPRINTF("usage: %s\n", argv[0]);
1962 code = -1;
1963 return;
1964 }
1965 while (nfnd > 0) {
1966 if ((nfnd = empty(cin, NULL, 0)) < 0) {
0511850f 1967 warn("Error resetting connection");
eedc536d
PA
1968 code = -1;
1969 lostpeer(0);
1970 } else if (nfnd)
1971 (void)getreply(0);
1972 }
1973}
1974
1975char *
1976gunique(const char *local)
1977{
1978 static char new[MAXPATHLEN];
1979 char *cp = strrchr(local, '/');
1980 int d, count=0, len;
1981 char ext = '1';
1982
1983 if (cp)
1984 *cp = '\0';
1985 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
1986 if (cp)
1987 *cp = '/';
1988 if (d < 0) {
0511850f 1989 warn("Can't access `%s'", local);
eedc536d
PA
1990 return (NULL);
1991 }
1992 len = strlcpy(new, local, sizeof(new));
1993 cp = &new[len];
1994 *cp++ = '.';
1995 while (!d) {
1996 if (++count == 100) {
1997 fputs("runique: can't find unique file name.\n",
1998 ttyout);
1999 return (NULL);
2000 }
2001 *cp++ = ext;
2002 *cp = '\0';
2003 if (ext == '9')
2004 ext = '0';
2005 else
2006 ext++;
2007 if ((d = access(new, F_OK)) < 0)
2008 break;
2009 if (ext != '0')
2010 cp--;
2011 else if (*(cp - 2) == '.')
2012 *(cp - 1) = '1';
2013 else {
2014 *(cp - 2) = *(cp - 2) + 1;
2015 cp--;
2016 }
2017 }
2018 return (new);
2019}
2020
2021/*
2022 * abort_squared --
2023 * aborts abort_remote(). lostpeer() is called because if the user is
2024 * too impatient to wait or there's another problem then ftp really
2025 * needs to get back to a known state.
2026 */
2027void
2028abort_squared(int dummy)
2029{
2030 char msgbuf[100];
2031 size_t len;
2032
2033 sigint_raised = 1;
2034 alarmtimer(0);
2035 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2036 sizeof(msgbuf));
2037 write(fileno(ttyout), msgbuf, len);
2038 lostpeer(0);
2039 siglongjmp(xferabort, 1);
2040}
2041
2042void
2043abort_remote(FILE *din)
2044{
2045 char buf[BUFSIZ];
2046 int nfnd;
2047
2048 if (cout == NULL) {
0511850f 2049 warnx("Lost control connection for abort");
eedc536d
PA
2050 if (ptabflg)
2051 code = -1;
2052 lostpeer(0);
2053 return;
2054 }
2055 /*
2056 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2057 * after urgent byte rather than before as is protocol now
2058 */
2059 buf[0] = IAC;
2060 buf[1] = IP;
2061 buf[2] = IAC;
2062 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
0511850f 2063 warn("Can't send abort message");
eedc536d
PA
2064 fprintf(cout, "%cABOR\r\n", DM);
2065 (void)fflush(cout);
2066 if ((nfnd = empty(cin, din, 10)) <= 0) {
2067 if (nfnd < 0)
0511850f 2068 warn("Can't send abort message");
eedc536d
PA
2069 if (ptabflg)
2070 code = -1;
2071 lostpeer(0);
2072 }
2073 if (din && (nfnd & 2)) {
2074 while (read(fileno(din), buf, BUFSIZ) > 0)
2075 continue;
2076 }
2077 if (getreply(0) == ERROR && code == 552) {
2078 /* 552 needed for nic style abort */
2079 (void)getreply(0);
2080 }
2081 (void)getreply(0);
2082}
2083
0511850f
PA
2084/*
2085 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2086 * IPv4 mapped address complicates too many things in FTP
2087 * protocol handling, as FTP protocol is defined differently
2088 * between IPv4 and IPv6.
2089 *
2090 * This may not be the best way to handle this situation,
2091 * since the semantics of IPv4 mapped address is defined in
2092 * the kernel. There are configurations where we should use
2093 * IPv4 mapped address as native IPv6 address, not as
2094 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2095 *
2096 * More complete solution would be to have an additional
2097 * getsockopt to grab "real" peername/sockname. "real"
2098 * peername/sockname will be AF_INET if IPv4 mapped address
2099 * is used to embed IPv4 address, and will be AF_INET6 if
2100 * we use it as native. What a mess!
2101 */
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2102void
2103ai_unmapped(struct addrinfo *ai)
2104{
2105#ifdef INET6
2106 struct sockaddr_in6 *sin6;
2107 struct sockaddr_in sin;
2108 socklen_t len;
2109
2110 if (ai->ai_family != AF_INET6)
2111 return;
2112 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2113 sizeof(sin) > ai->ai_addrlen)
2114 return;
2115 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2116 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2117 return;
2118
2119 memset(&sin, 0, sizeof(sin));
2120 sin.sin_family = AF_INET;
2121 len = sizeof(struct sockaddr_in);
2122 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2123 sizeof(sin.sin_addr));
2124 sin.sin_port = sin6->sin6_port;
2125
2126 ai->ai_family = AF_INET;
3b706bf0 2127#if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
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PA
2128 sin.sin_len = len;
2129#endif
2130 memcpy(ai->ai_addr, &sin, len);
2131 ai->ai_addrlen = len;
2132#endif
2133}
2134
2135#ifdef NO_USAGE
2136void
2137xusage(void)
2138{
2139 fputs("Usage error\n", ttyout);
2140}
2141#endif