1 /* $NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp $ */
2
3 /*-
4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
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
93 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
94 #else
95 __RCSID("$NetBSD: ftp.c,v 1.164 2012/07/04 06:09:37 is Exp $");
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 #if !defined(__minix)
106 #include <netinet/in_systm.h>
107 #include <netinet/ip.h>
108 #endif /* !defined(__minix) */
109 #include <arpa/inet.h>
110 #include <arpa/ftp.h>
111 #include <arpa/telnet.h>
112
113 #include <assert.h>
114 #include <ctype.h>
115 #include <err.h>
116 #include <errno.h>
117 #include <fcntl.h>
118 #include <netdb.h>
119 #include <stdio.h>
120 #include <stdlib.h>
121 #include <string.h>
122 #include <time.h>
123 #include <unistd.h>
124 #include <stdarg.h>
125
126 #include "ftp_var.h"
127
128 volatile sig_atomic_t abrtflag;
129 volatile sig_atomic_t timeoutflag;
130
131 sigjmp_buf ptabort;
132 int ptabflg;
133 int ptflag = 0;
134 char pasv[BUFSIZ]; /* passive port for proxy data connection */
135
136 static int empty(FILE *, FILE *, int);
137 __dead static void abort_squared(int);
138
139 struct sockinet {
140 union sockunion {
141 struct sockaddr_in su_sin;
142 #ifdef INET6
143 struct sockaddr_in6 su_sin6;
144 #endif
145 } si_su;
146 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
147 int si_len;
148 #endif
149 };
150
151 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
152 # define su_len si_len
153 #else
154 # define su_len si_su.su_sin.sin_len
155 #endif
156 #define su_family si_su.su_sin.sin_family
157 #define su_port si_su.su_sin.sin_port
158
159 struct sockinet myctladdr, hisctladdr, data_addr;
160
161 char *
hookup(const char * host,const char * port)162 hookup(const char *host, const char *port)
163 {
164 int s = -1, error;
165 struct addrinfo hints, *res, *res0;
166 static char hostnamebuf[MAXHOSTNAMELEN];
167 socklen_t len;
168 #if !defined(__minix)
169 int on = 1;
170 #endif /* !defined(__minix) */
171
172 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
173 memset((char *)&myctladdr, 0, sizeof (myctladdr));
174 memset(&hints, 0, sizeof(hints));
175 hints.ai_flags = AI_CANONNAME;
176 hints.ai_family = family;
177 hints.ai_socktype = SOCK_STREAM;
178 hints.ai_protocol = 0;
179 error = getaddrinfo(host, port, &hints, &res0);
180 if (error) {
181 warnx("Can't lookup `%s:%s': %s", host, port,
182 (error == EAI_SYSTEM) ? strerror(errno)
183 : gai_strerror(error));
184 code = -1;
185 return (0);
186 }
187
188 if (res0->ai_canonname)
189 (void)strlcpy(hostnamebuf, res0->ai_canonname,
190 sizeof(hostnamebuf));
191 else
192 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
193 hostname = hostnamebuf;
194
195 for (res = res0; res; res = res->ai_next) {
196 char hname[NI_MAXHOST], sname[NI_MAXSERV];
197
198 ai_unmapped(res);
199 if (getnameinfo(res->ai_addr, res->ai_addrlen,
200 hname, sizeof(hname), sname, sizeof(sname),
201 NI_NUMERICHOST | NI_NUMERICSERV) != 0) {
202 strlcpy(hname, "?", sizeof(hname));
203 strlcpy(sname, "?", sizeof(sname));
204 }
205 if (verbose && res0->ai_next) {
206 /* if we have multiple possibilities */
207 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname);
208 }
209 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
210 if (s < 0) {
211 warn("Can't create socket for connection to `%s:%s'",
212 hname, sname);
213 continue;
214 }
215 if (ftp_connect(s, res->ai_addr, res->ai_addrlen,
216 verbose || !res->ai_next) < 0) {
217 close(s);
218 s = -1;
219 continue;
220 }
221
222 /* finally we got one */
223 break;
224 }
225 if (s < 0) {
226 warnx("Can't connect to `%s:%s'", host, port);
227 code = -1;
228 freeaddrinfo(res0);
229 return 0;
230 }
231 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
232 hisctladdr.su_len = res->ai_addrlen;
233 freeaddrinfo(res0);
234 res0 = res = NULL;
235
236 len = hisctladdr.su_len;
237 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
238 warn("Can't determine my address of connection to `%s:%s'",
239 host, port);
240 code = -1;
241 goto bad;
242 }
243 myctladdr.su_len = len;
244
245 #ifdef IPTOS_LOWDELAY
246 if (hisctladdr.su_family == AF_INET) {
247 int tos = IPTOS_LOWDELAY;
248 if (setsockopt(s, IPPROTO_IP, IP_TOS,
249 (void *)&tos, sizeof(tos)) == -1) {
250 DWARN("setsockopt %s (ignored)",
251 "IPTOS_LOWDELAY");
252 }
253 }
254 #endif
255 cin = fdopen(s, "r");
256 cout = fdopen(s, "w");
257 if (cin == NULL || cout == NULL) {
258 warnx("Can't fdopen socket");
259 if (cin)
260 (void)fclose(cin);
261 if (cout)
262 (void)fclose(cout);
263 code = -1;
264 goto bad;
265 }
266 if (verbose)
267 fprintf(ttyout, "Connected to %s.\n", hostname);
268 if (getreply(0) > 2) { /* read startup message from server */
269 if (cin)
270 (void)fclose(cin);
271 if (cout)
272 (void)fclose(cout);
273 code = -1;
274 goto bad;
275 }
276
277 #if !defined(__minix)
278 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
279 (void *)&on, sizeof(on)) == -1) {
280 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
281 }
282 #endif /* !defined(__minix) */
283
284 return (hostname);
285 bad:
286 (void)close(s);
287 return (NULL);
288 }
289
290 void
cmdabort(int notused)291 cmdabort(int notused)
292 {
293 int oerrno = errno;
294
295 sigint_raised = 1;
296 alarmtimer(0);
297 if (fromatty)
298 write(fileno(ttyout), "\n", 1);
299 abrtflag++;
300 if (ptflag)
301 siglongjmp(ptabort, 1);
302 errno = oerrno;
303 }
304
305 void
cmdtimeout(int notused)306 cmdtimeout(int notused)
307 {
308 int oerrno = errno;
309
310 alarmtimer(0);
311 if (fromatty)
312 write(fileno(ttyout), "\n", 1);
313 timeoutflag++;
314 if (ptflag)
315 siglongjmp(ptabort, 1);
316 errno = oerrno;
317 }
318
319 /*VARARGS*/
320 int
command(const char * fmt,...)321 command(const char *fmt, ...)
322 {
323 va_list ap;
324 int r;
325 sigfunc oldsigint;
326
327 #ifndef NO_DEBUG
328 if (ftp_debug) {
329 fputs("---> ", ttyout);
330 va_start(ap, fmt);
331 if (strncmp("PASS ", fmt, 5) == 0)
332 fputs("PASS XXXX", ttyout);
333 else if (strncmp("ACCT ", fmt, 5) == 0)
334 fputs("ACCT XXXX", ttyout);
335 else
336 vfprintf(ttyout, fmt, ap);
337 va_end(ap);
338 putc('\n', ttyout);
339 }
340 #endif
341 if (cout == NULL) {
342 warnx("No control connection for command");
343 code = -1;
344 return (0);
345 }
346
347 abrtflag = 0;
348
349 oldsigint = xsignal(SIGINT, cmdabort);
350
351 va_start(ap, fmt);
352 vfprintf(cout, fmt, ap);
353 va_end(ap);
354 fputs("\r\n", cout);
355 (void)fflush(cout);
356 cpend = 1;
357 r = getreply(!strcmp(fmt, "QUIT"));
358 if (abrtflag && oldsigint != SIG_IGN)
359 (*oldsigint)(SIGINT);
360 (void)xsignal(SIGINT, oldsigint);
361 return (r);
362 }
363
364 static const char *m421[] = {
365 "remote server timed out. Connection closed",
366 "user interrupt. Connection closed",
367 "remote server has closed connection",
368 };
369
370 int
getreply(int expecteof)371 getreply(int expecteof)
372 {
373 char current_line[BUFSIZ]; /* last line of previous reply */
374 int c, n, lineno;
375 int dig;
376 int originalcode = 0, continuation = 0;
377 sigfunc oldsigint, oldsigalrm;
378 int pflag = 0;
379 char *cp, *pt = pasv;
380
381 abrtflag = 0;
382 timeoutflag = 0;
383
384 oldsigint = xsignal(SIGINT, cmdabort);
385 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
386
387 for (lineno = 0 ;; lineno++) {
388 dig = n = code = 0;
389 cp = current_line;
390 while (alarmtimer(quit_time ? quit_time : 60),
391 ((c = getc(cin)) != '\n')) {
392 if (c == IAC) { /* handle telnet commands */
393 switch (c = getc(cin)) {
394 case WILL:
395 case WONT:
396 c = getc(cin);
397 fprintf(cout, "%c%c%c", IAC, DONT, c);
398 (void)fflush(cout);
399 break;
400 case DO:
401 case DONT:
402 c = getc(cin);
403 fprintf(cout, "%c%c%c", IAC, WONT, c);
404 (void)fflush(cout);
405 break;
406 default:
407 break;
408 }
409 continue;
410 }
411 dig++;
412 if (c == EOF) {
413 /*
414 * these will get trashed by pswitch()
415 * in lostpeer()
416 */
417 int reply_timeoutflag = timeoutflag;
418 int reply_abrtflag = abrtflag;
419
420 alarmtimer(0);
421 if (expecteof && feof(cin)) {
422 (void)xsignal(SIGINT, oldsigint);
423 (void)xsignal(SIGALRM, oldsigalrm);
424 code = 221;
425 return (0);
426 }
427 cpend = 0;
428 lostpeer(0);
429 if (verbose) {
430 size_t midx;
431 if (reply_timeoutflag)
432 midx = 0;
433 else if (reply_abrtflag)
434 midx = 1;
435 else
436 midx = 2;
437 (void)fprintf(ttyout,
438 "421 Service not available, %s.\n", m421[midx]);
439 (void)fflush(ttyout);
440 }
441 code = 421;
442 (void)xsignal(SIGINT, oldsigint);
443 (void)xsignal(SIGALRM, oldsigalrm);
444 return (4);
445 }
446 if (c != '\r' && (verbose > 0 ||
447 ((verbose > -1 && n == '5' && dig > 4) &&
448 (((!n && c < '5') || (n && n < '5'))
449 || !retry_connect)))) {
450 if (proxflag &&
451 (dig == 1 || (dig == 5 && verbose == 0)))
452 fprintf(ttyout, "%s:", hostname);
453 (void)putc(c, ttyout);
454 }
455 if (dig < 4 && isdigit(c))
456 code = code * 10 + (c - '0');
457 if (!pflag && (code == 227 || code == 228))
458 pflag = 1;
459 else if (!pflag && code == 229)
460 pflag = 100;
461 if (dig > 4 && pflag == 1 && isdigit(c))
462 pflag = 2;
463 if (pflag == 2) {
464 if (c != '\r' && c != ')') {
465 if (pt < &pasv[sizeof(pasv) - 1])
466 *pt++ = c;
467 } else {
468 *pt = '\0';
469 pflag = 3;
470 }
471 }
472 if (pflag == 100 && c == '(')
473 pflag = 2;
474 if (dig == 4 && c == '-') {
475 if (continuation)
476 code = 0;
477 continuation++;
478 }
479 if (n == 0)
480 n = c;
481 if (cp < ¤t_line[sizeof(current_line) - 1])
482 *cp++ = c;
483 }
484 if (verbose > 0 || ((verbose > -1 && n == '5') &&
485 (n < '5' || !retry_connect))) {
486 (void)putc(c, ttyout);
487 (void)fflush(ttyout);
488 }
489 if (cp[-1] == '\r')
490 cp[-1] = '\0';
491 *cp = '\0';
492 if (lineno == 0)
493 (void)strlcpy(reply_string, current_line,
494 sizeof(reply_string));
495 if (lineno > 0 && code == 0 && reply_callback != NULL)
496 (*reply_callback)(current_line);
497 if (continuation && code != originalcode) {
498 if (originalcode == 0)
499 originalcode = code;
500 continue;
501 }
502 if (n != '1')
503 cpend = 0;
504 alarmtimer(0);
505 (void)xsignal(SIGINT, oldsigint);
506 (void)xsignal(SIGALRM, oldsigalrm);
507 if (code == 421 || originalcode == 421)
508 lostpeer(0);
509 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
510 (*oldsigint)(SIGINT);
511 if (timeoutflag && oldsigalrm != cmdtimeout &&
512 oldsigalrm != SIG_IGN)
513 (*oldsigalrm)(SIGINT);
514 return (n - '0');
515 }
516 }
517
518 static int
empty(FILE * ecin,FILE * din,int sec)519 empty(FILE *ecin, FILE *din, int sec)
520 {
521 int nr, nfd;
522 struct pollfd pfd[2];
523
524 nfd = 0;
525 if (ecin) {
526 pfd[nfd].fd = fileno(ecin);
527 pfd[nfd++].events = POLLIN;
528 }
529
530 if (din) {
531 pfd[nfd].fd = fileno(din);
532 pfd[nfd++].events = POLLIN;
533 }
534
535 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
536 return nr;
537
538 nr = 0;
539 nfd = 0;
540 if (ecin)
541 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
542 if (din)
543 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
544 return nr;
545 }
546
547 sigjmp_buf xferabort;
548
549 __dead static void
abortxfer(int notused)550 abortxfer(int notused)
551 {
552 char msgbuf[100];
553 size_t len;
554
555 sigint_raised = 1;
556 alarmtimer(0);
557 mflag = 0;
558 abrtflag = 0;
559 switch (direction[0]) {
560 case 'r':
561 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
562 break;
563 case 's':
564 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
565 break;
566 default:
567 errx(1, "abortxfer: unknown direction `%s'", direction);
568 }
569 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
570 sizeof(msgbuf));
571 write(fileno(ttyout), msgbuf, len);
572 siglongjmp(xferabort, 1);
573 }
574
575 /*
576 * Read data from infd & write to outfd, using buf/bufsize as the temporary
577 * buffer, dealing with short writes.
578 * If rate_limit != 0, rate-limit the transfer.
579 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
580 * Updates global variables: bytes.
581 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
582 * In the case of error, errno contains the appropriate error code.
583 */
584 static int
copy_bytes(int infd,int outfd,char * buf,size_t bufsize,int rate_limit,int hash_interval)585 copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
586 int rate_limit, int hash_interval)
587 {
588 volatile off_t hashc;
589 ssize_t inc, outc;
590 char *bufp;
591 struct timeval tvthen, tvnow, tvdiff;
592 off_t bufrem, bufchunk;
593 int serr;
594
595 hashc = hash_interval;
596 if (rate_limit)
597 bufchunk = rate_limit;
598 else
599 bufchunk = bufsize;
600
601 while (1) {
602 if (rate_limit) {
603 (void)gettimeofday(&tvthen, NULL);
604 }
605 errno = 0;
606 inc = outc = 0;
607 /* copy bufchunk at a time */
608 bufrem = bufchunk;
609 while (bufrem > 0) {
610 inc = read(infd, buf, MIN((off_t)bufsize, bufrem));
611 if (inc <= 0)
612 goto copy_done;
613 bytes += inc;
614 bufrem -= inc;
615 bufp = buf;
616 while (inc > 0) {
617 outc = write(outfd, bufp, inc);
618 if (outc < 0)
619 goto copy_done;
620 inc -= outc;
621 bufp += outc;
622 }
623 if (hash_interval) {
624 while (bytes >= hashc) {
625 (void)putc('#', ttyout);
626 hashc += hash_interval;
627 }
628 (void)fflush(ttyout);
629 }
630 }
631 if (rate_limit) { /* rate limited; wait if necessary */
632 while (1) {
633 (void)gettimeofday(&tvnow, NULL);
634 timersub(&tvnow, &tvthen, &tvdiff);
635 if (tvdiff.tv_sec > 0)
636 break;
637 usleep(1000000 - tvdiff.tv_usec);
638 }
639 }
640 }
641
642 copy_done:
643 serr = errno;
644 if (hash_interval && bytes > 0) {
645 if (bytes < hash_interval)
646 (void)putc('#', ttyout);
647 (void)putc('\n', ttyout);
648 (void)fflush(ttyout);
649 }
650 errno = serr;
651 if (inc == -1)
652 return 1;
653 if (outc == -1)
654 return 2;
655
656 return 0;
657 }
658
659 void
sendrequest(const char * cmd,const char * local,const char * remote,int printnames)660 sendrequest(const char *cmd, const char *local, const char *remote,
661 int printnames)
662 {
663 struct stat st;
664 int c;
665 FILE *volatile fin;
666 FILE *volatile dout;
667 int (*volatile closefunc)(FILE *);
668 sigfunc volatile oldintr;
669 sigfunc volatile oldintp;
670 off_t volatile hashbytes;
671 int hash_interval;
672 const char *lmode;
673 static size_t bufsize;
674 static char *buf;
675 int oprogress;
676
677 hashbytes = mark;
678 direction = "sent";
679 dout = NULL;
680 bytes = 0;
681 filesize = -1;
682 oprogress = progress;
683 if (verbose && printnames) {
684 if (*local != '-')
685 fprintf(ttyout, "local: %s ", local);
686 if (remote)
687 fprintf(ttyout, "remote: %s\n", remote);
688 }
689 if (proxy) {
690 proxtrans(cmd, local, remote);
691 return;
692 }
693 if (curtype != type)
694 changetype(type, 0);
695 closefunc = NULL;
696 oldintr = NULL;
697 oldintp = NULL;
698 lmode = "w";
699 if (sigsetjmp(xferabort, 1)) {
700 while (cpend)
701 (void)getreply(0);
702 code = -1;
703 goto cleanupsend;
704 }
705 (void)xsignal(SIGQUIT, psummary);
706 oldintr = xsignal(SIGINT, abortxfer);
707 if (strcmp(local, "-") == 0) {
708 fin = stdin;
709 progress = 0;
710 } else if (*local == '|') {
711 oldintp = xsignal(SIGPIPE, SIG_IGN);
712 fin = popen(local + 1, "r");
713 if (fin == NULL) {
714 warn("Can't execute `%s'", local + 1);
715 code = -1;
716 goto cleanupsend;
717 }
718 progress = 0;
719 closefunc = pclose;
720 } else {
721 fin = fopen(local, "r");
722 if (fin == NULL) {
723 warn("Can't open `%s'", local);
724 code = -1;
725 goto cleanupsend;
726 }
727 closefunc = fclose;
728 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
729 fprintf(ttyout, "%s: not a plain file.\n", local);
730 code = -1;
731 goto cleanupsend;
732 }
733 filesize = st.st_size;
734 }
735 if (initconn()) {
736 code = -1;
737 goto cleanupsend;
738 }
739 if (sigsetjmp(xferabort, 1))
740 goto abort;
741
742 if (restart_point &&
743 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
744 int rc;
745
746 rc = -1;
747 switch (curtype) {
748 case TYPE_A:
749 rc = fseeko(fin, restart_point, SEEK_SET);
750 break;
751 case TYPE_I:
752 case TYPE_L:
753 rc = lseek(fileno(fin), restart_point, SEEK_SET);
754 break;
755 }
756 if (rc < 0) {
757 warn("Can't seek to restart `%s'", local);
758 goto cleanupsend;
759 }
760 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
761 goto cleanupsend;
762 lmode = "r+";
763 }
764 if (remote) {
765 if (command("%s %s", cmd, remote) != PRELIM)
766 goto cleanupsend;
767 } else {
768 if (command("%s", cmd) != PRELIM)
769 goto cleanupsend;
770 }
771 dirchange = 1;
772 dout = dataconn(lmode);
773 if (dout == NULL)
774 goto abort;
775
776 assert(sndbuf_size > 0);
777 if ((size_t)sndbuf_size > bufsize) {
778 if (buf)
779 (void)free(buf);
780 bufsize = sndbuf_size;
781 buf = ftp_malloc(bufsize);
782 }
783
784 progressmeter(-1);
785 oldintp = xsignal(SIGPIPE, SIG_IGN);
786 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
787
788 switch (curtype) {
789
790 case TYPE_I:
791 case TYPE_L:
792 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
793 rate_put, hash_interval);
794 if (c == 1) {
795 warn("Reading `%s'", local);
796 } else if (c == 2) {
797 if (errno != EPIPE)
798 warn("Writing to network");
799 bytes = -1;
800 }
801 break;
802
803 case TYPE_A:
804 while ((c = getc(fin)) != EOF) {
805 if (c == '\n') {
806 while (hash_interval && bytes >= hashbytes) {
807 (void)putc('#', ttyout);
808 (void)fflush(ttyout);
809 hashbytes += mark;
810 }
811 if (ferror(dout))
812 break;
813 (void)putc('\r', dout);
814 bytes++;
815 }
816 (void)putc(c, dout);
817 bytes++;
818 #if 0 /* this violates RFC 959 */
819 if (c == '\r') {
820 (void)putc('\0', dout);
821 bytes++;
822 }
823 #endif
824 }
825 if (hash_interval) {
826 if (bytes < hashbytes)
827 (void)putc('#', ttyout);
828 (void)putc('\n', ttyout);
829 }
830 if (ferror(fin))
831 warn("Reading `%s'", local);
832 if (ferror(dout)) {
833 if (errno != EPIPE)
834 warn("Writing to network");
835 bytes = -1;
836 }
837 break;
838 }
839
840 progressmeter(1);
841 if (closefunc != NULL) {
842 (*closefunc)(fin);
843 fin = NULL;
844 }
845 (void)fclose(dout);
846 dout = NULL;
847 (void)getreply(0);
848 if (bytes > 0)
849 ptransfer(0);
850 goto cleanupsend;
851
852 abort:
853 (void)xsignal(SIGINT, oldintr);
854 oldintr = NULL;
855 if (!cpend) {
856 code = -1;
857 goto cleanupsend;
858 }
859 if (data >= 0) {
860 (void)close(data);
861 data = -1;
862 }
863 if (dout) {
864 (void)fclose(dout);
865 dout = NULL;
866 }
867 (void)getreply(0);
868 code = -1;
869 if (bytes > 0)
870 ptransfer(0);
871
872 cleanupsend:
873 if (oldintr)
874 (void)xsignal(SIGINT, oldintr);
875 if (oldintp)
876 (void)xsignal(SIGPIPE, oldintp);
877 if (data >= 0) {
878 (void)close(data);
879 data = -1;
880 }
881 if (closefunc != NULL && fin != NULL)
882 (*closefunc)(fin);
883 if (dout)
884 (void)fclose(dout);
885 progress = oprogress;
886 restart_point = 0;
887 bytes = 0;
888 }
889
890 void
recvrequest(const char * cmd,const char * volatile local,const char * remote,const char * lmode,int printnames,int ignorespecial)891 recvrequest(const char *cmd, const char *volatile local, const char *remote,
892 const char *lmode, int printnames, int ignorespecial)
893 {
894 FILE *volatile fout;
895 FILE *volatile din;
896 int (*volatile closefunc)(FILE *);
897 sigfunc volatile oldintr;
898 sigfunc volatile oldintp;
899 int c, d;
900 int volatile is_retr;
901 int volatile tcrflag;
902 int volatile bare_lfs;
903 static size_t bufsize;
904 static char *buf;
905 off_t volatile hashbytes;
906 int hash_interval;
907 struct stat st;
908 time_t mtime;
909 struct timeval tval[2];
910 int oprogress;
911 int opreserve;
912
913 fout = NULL;
914 din = NULL;
915 hashbytes = mark;
916 direction = "received";
917 bytes = 0;
918 bare_lfs = 0;
919 filesize = -1;
920 oprogress = progress;
921 opreserve = preserve;
922 is_retr = (strcmp(cmd, "RETR") == 0);
923 if (is_retr && verbose && printnames) {
924 if (ignorespecial || *local != '-')
925 fprintf(ttyout, "local: %s ", local);
926 if (remote)
927 fprintf(ttyout, "remote: %s\n", remote);
928 }
929 if (proxy && is_retr) {
930 proxtrans(cmd, local, remote);
931 return;
932 }
933 closefunc = NULL;
934 oldintr = NULL;
935 oldintp = NULL;
936 tcrflag = !crflag && is_retr;
937 if (sigsetjmp(xferabort, 1)) {
938 while (cpend)
939 (void)getreply(0);
940 code = -1;
941 goto cleanuprecv;
942 }
943 (void)xsignal(SIGQUIT, psummary);
944 oldintr = xsignal(SIGINT, abortxfer);
945 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
946 if (access(local, W_OK) < 0) {
947 char *dir = strrchr(local, '/');
948
949 if (errno != ENOENT && errno != EACCES) {
950 warn("Can't access `%s'", local);
951 code = -1;
952 goto cleanuprecv;
953 }
954 if (dir != NULL)
955 *dir = 0;
956 d = access(dir == local ? "/" :
957 dir ? local : ".", W_OK);
958 if (dir != NULL)
959 *dir = '/';
960 if (d < 0) {
961 warn("Can't access `%s'", local);
962 code = -1;
963 goto cleanuprecv;
964 }
965 if (!runique && errno == EACCES &&
966 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
967 warn("Can't chmod `%s'", local);
968 code = -1;
969 goto cleanuprecv;
970 }
971 if (runique && errno == EACCES &&
972 (local = gunique(local)) == NULL) {
973 code = -1;
974 goto cleanuprecv;
975 }
976 }
977 else if (runique && (local = gunique(local)) == NULL) {
978 code = -1;
979 goto cleanuprecv;
980 }
981 }
982 if (!is_retr) {
983 if (curtype != TYPE_A)
984 changetype(TYPE_A, 0);
985 } else {
986 if (curtype != type)
987 changetype(type, 0);
988 filesize = remotesize(remote, 0);
989 if (code == 421 || code == -1)
990 goto cleanuprecv;
991 }
992 if (initconn()) {
993 code = -1;
994 goto cleanuprecv;
995 }
996 if (sigsetjmp(xferabort, 1))
997 goto abort;
998 if (is_retr && restart_point &&
999 command("REST " LLF, (LLT) restart_point) != CONTINUE)
1000 goto cleanuprecv;
1001 if (! EMPTYSTRING(remote)) {
1002 if (command("%s %s", cmd, remote) != PRELIM)
1003 goto cleanuprecv;
1004 } else {
1005 if (command("%s", cmd) != PRELIM)
1006 goto cleanuprecv;
1007 }
1008 din = dataconn("r");
1009 if (din == NULL)
1010 goto abort;
1011 if (!ignorespecial && strcmp(local, "-") == 0) {
1012 fout = stdout;
1013 progress = 0;
1014 preserve = 0;
1015 } else if (!ignorespecial && *local == '|') {
1016 oldintp = xsignal(SIGPIPE, SIG_IGN);
1017 fout = popen(local + 1, "w");
1018 if (fout == NULL) {
1019 warn("Can't execute `%s'", local+1);
1020 goto abort;
1021 }
1022 progress = 0;
1023 preserve = 0;
1024 closefunc = pclose;
1025 } else {
1026 fout = fopen(local, lmode);
1027 if (fout == NULL) {
1028 warn("Can't open `%s'", local);
1029 goto abort;
1030 }
1031 closefunc = fclose;
1032 }
1033
1034 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1035 progress = 0;
1036 preserve = 0;
1037 }
1038 assert(rcvbuf_size > 0);
1039 if ((size_t)rcvbuf_size > bufsize) {
1040 if (buf)
1041 (void)free(buf);
1042 bufsize = rcvbuf_size;
1043 buf = ftp_malloc(bufsize);
1044 }
1045
1046 progressmeter(-1);
1047 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
1048
1049 switch (curtype) {
1050
1051 case TYPE_I:
1052 case TYPE_L:
1053 if (is_retr && restart_point &&
1054 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
1055 warn("Can't seek to restart `%s'", local);
1056 goto cleanuprecv;
1057 }
1058 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1059 rate_get, hash_interval);
1060 if (c == 1) {
1061 if (errno != EPIPE)
1062 warn("Reading from network");
1063 bytes = -1;
1064 } else if (c == 2) {
1065 warn("Writing `%s'", local);
1066 }
1067 break;
1068
1069 case TYPE_A:
1070 if (is_retr && restart_point) {
1071 int ch;
1072 off_t i;
1073
1074 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1075 goto done;
1076 for (i = 0; i++ < restart_point;) {
1077 if ((ch = getc(fout)) == EOF)
1078 goto done;
1079 if (ch == '\n')
1080 i++;
1081 }
1082 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1083 done:
1084 warn("Can't seek to restart `%s'", local);
1085 goto cleanuprecv;
1086 }
1087 }
1088 while ((c = getc(din)) != EOF) {
1089 if (c == '\n')
1090 bare_lfs++;
1091 while (c == '\r') {
1092 while (hash_interval && bytes >= hashbytes) {
1093 (void)putc('#', ttyout);
1094 (void)fflush(ttyout);
1095 hashbytes += mark;
1096 }
1097 bytes++;
1098 if ((c = getc(din)) != '\n' || tcrflag) {
1099 if (ferror(fout))
1100 goto break2;
1101 (void)putc('\r', fout);
1102 if (c == '\0') {
1103 bytes++;
1104 goto contin2;
1105 }
1106 if (c == EOF)
1107 goto contin2;
1108 }
1109 }
1110 (void)putc(c, fout);
1111 bytes++;
1112 contin2: ;
1113 }
1114 break2:
1115 if (hash_interval) {
1116 if (bytes < hashbytes)
1117 (void)putc('#', ttyout);
1118 (void)putc('\n', ttyout);
1119 }
1120 if (ferror(din)) {
1121 if (errno != EPIPE)
1122 warn("Reading from network");
1123 bytes = -1;
1124 }
1125 if (ferror(fout))
1126 warn("Writing `%s'", local);
1127 break;
1128 }
1129
1130 progressmeter(1);
1131 if (closefunc != NULL) {
1132 (*closefunc)(fout);
1133 fout = NULL;
1134 }
1135 (void)fclose(din);
1136 din = NULL;
1137 (void)getreply(0);
1138 if (bare_lfs) {
1139 fprintf(ttyout,
1140 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1141 bare_lfs);
1142 fputs("File may not have transferred correctly.\n", ttyout);
1143 }
1144 if (bytes >= 0 && is_retr) {
1145 if (bytes > 0)
1146 ptransfer(0);
1147 if (preserve && (closefunc == fclose)) {
1148 mtime = remotemodtime(remote, 0);
1149 if (mtime != -1) {
1150 (void)gettimeofday(&tval[0], NULL);
1151 tval[1].tv_sec = mtime;
1152 tval[1].tv_usec = 0;
1153 if (utimes(local, tval) == -1) {
1154 fprintf(ttyout,
1155 "Can't change modification time on %s to %s",
1156 local,
1157 rfc2822time(localtime(&mtime)));
1158 }
1159 }
1160 }
1161 }
1162 goto cleanuprecv;
1163
1164 abort:
1165 /*
1166 * abort using RFC 959 recommended IP,SYNC sequence
1167 */
1168 if (! sigsetjmp(xferabort, 1)) {
1169 /* this is the first call */
1170 (void)xsignal(SIGINT, abort_squared);
1171 if (!cpend) {
1172 code = -1;
1173 goto cleanuprecv;
1174 }
1175 abort_remote(din);
1176 }
1177 code = -1;
1178 if (bytes > 0)
1179 ptransfer(0);
1180
1181 cleanuprecv:
1182 if (oldintr)
1183 (void)xsignal(SIGINT, oldintr);
1184 if (oldintp)
1185 (void)xsignal(SIGPIPE, oldintp);
1186 if (data >= 0) {
1187 (void)close(data);
1188 data = -1;
1189 }
1190 if (closefunc != NULL && fout != NULL)
1191 (*closefunc)(fout);
1192 if (din)
1193 (void)fclose(din);
1194 progress = oprogress;
1195 preserve = opreserve;
1196 bytes = 0;
1197 }
1198
1199 /*
1200 * Need to start a listen on the data channel before we send the command,
1201 * otherwise the server's connect may fail.
1202 */
1203 int
initconn(void)1204 initconn(void)
1205 {
1206 char *p, *a;
1207 int result, tmpno = 0;
1208 int on = 1;
1209 int error;
1210 unsigned int addr[16], port[2];
1211 unsigned int af, hal, pal;
1212 socklen_t len;
1213 const char *pasvcmd = NULL;
1214 int overbose;
1215
1216 #ifdef INET6
1217 #ifndef NO_DEBUG
1218 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1219 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1220 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
1221 warnx("Use of scoped addresses can be troublesome");
1222 }
1223 #endif
1224 #endif
1225
1226 reinit:
1227 if (passivemode) {
1228 data_addr = myctladdr;
1229 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1230 if (data < 0) {
1231 warn("Can't create socket for data connection");
1232 return (1);
1233 }
1234 if ((options & SO_DEBUG) &&
1235 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1236 (void *)&on, sizeof(on)) == -1) {
1237 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1238 }
1239 result = COMPLETE + 1;
1240 switch (data_addr.su_family) {
1241 case AF_INET:
1242 if (epsv4 && !epsv4bad) {
1243 pasvcmd = "EPSV";
1244 overbose = verbose;
1245 if (ftp_debug == 0)
1246 verbose = -1;
1247 result = command("EPSV");
1248 verbose = overbose;
1249 if (verbose > 0 &&
1250 (result == COMPLETE || !connected))
1251 fprintf(ttyout, "%s\n", reply_string);
1252 if (!connected)
1253 return (1);
1254 /*
1255 * this code is to be friendly with broken
1256 * BSDI ftpd
1257 */
1258 if (code / 10 == 22 && code != 229) {
1259 fputs(
1260 "wrong server: return code must be 229\n",
1261 ttyout);
1262 result = COMPLETE + 1;
1263 }
1264 if (result != COMPLETE) {
1265 epsv4bad = 1;
1266 DPRINTF("disabling epsv4 for this "
1267 "connection\n");
1268 }
1269 }
1270 if (result != COMPLETE) {
1271 pasvcmd = "PASV";
1272 result = command("PASV");
1273 if (!connected)
1274 return (1);
1275 }
1276 break;
1277 #ifdef INET6
1278 case AF_INET6:
1279 if (epsv6 && !epsv6bad) {
1280 pasvcmd = "EPSV";
1281 overbose = verbose;
1282 if (ftp_debug == 0)
1283 verbose = -1;
1284 result = command("EPSV");
1285 verbose = overbose;
1286 if (verbose > 0 &&
1287 (result == COMPLETE || !connected))
1288 fprintf(ttyout, "%s\n", reply_string);
1289 if (!connected)
1290 return (1);
1291 /*
1292 * this code is to be friendly with
1293 * broken BSDI ftpd
1294 */
1295 if (code / 10 == 22 && code != 229) {
1296 fputs(
1297 "wrong server: return code must be 229\n",
1298 ttyout);
1299 result = COMPLETE + 1;
1300 }
1301 if (result != COMPLETE) {
1302 epsv6bad = 1;
1303 DPRINTF("disabling epsv6 for this "
1304 "connection\n");
1305 }
1306 }
1307 if (result != COMPLETE) {
1308 pasvcmd = "LPSV";
1309 result = command("LPSV");
1310 }
1311 if (!connected)
1312 return (1);
1313 break;
1314 #endif
1315 default:
1316 result = COMPLETE + 1;
1317 break;
1318 }
1319 if (result != COMPLETE) {
1320 if (activefallback) {
1321 (void)close(data);
1322 data = -1;
1323 passivemode = 0;
1324 #if 0
1325 activefallback = 0;
1326 #endif
1327 goto reinit;
1328 }
1329 fputs("Passive mode refused.\n", ttyout);
1330 goto bad;
1331 }
1332
1333 #define pack2(var, off) \
1334 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1335 #define pack4(var, off) \
1336 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1337 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1338 #define UC(b) (((int)b)&0xff)
1339
1340 /*
1341 * What we've got at this point is a string of comma separated
1342 * one-byte unsigned integer values, separated by commas.
1343 */
1344 if (strcmp(pasvcmd, "PASV") == 0) {
1345 if (data_addr.su_family != AF_INET) {
1346 fputs(
1347 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1348 error = 1;
1349 goto bad;
1350 }
1351 if (code / 10 == 22 && code != 227) {
1352 fputs("wrong server: return code must be 227\n",
1353 ttyout);
1354 error = 1;
1355 goto bad;
1356 }
1357 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1358 &addr[0], &addr[1], &addr[2], &addr[3],
1359 &port[0], &port[1]);
1360 if (error != 6) {
1361 fputs(
1362 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1363 error = 1;
1364 goto bad;
1365 }
1366 error = 0;
1367 memset(&data_addr, 0, sizeof(data_addr));
1368 data_addr.su_family = AF_INET;
1369 data_addr.su_len = sizeof(struct sockaddr_in);
1370 data_addr.si_su.su_sin.sin_addr.s_addr =
1371 htonl(pack4(addr, 0));
1372 data_addr.su_port = htons(pack2(port, 0));
1373 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1374 if (code / 10 == 22 && code != 228) {
1375 fputs("wrong server: return code must be 228\n",
1376 ttyout);
1377 error = 1;
1378 goto bad;
1379 }
1380 switch (data_addr.su_family) {
1381 case AF_INET:
1382 error = sscanf(pasv,
1383 "%u,%u,%u,%u,%u,%u,%u,%u,%u",
1384 &af, &hal,
1385 &addr[0], &addr[1], &addr[2], &addr[3],
1386 &pal, &port[0], &port[1]);
1387 if (error != 9) {
1388 fputs(
1389 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1390 error = 1;
1391 goto bad;
1392 }
1393 if (af != 4 || hal != 4 || pal != 2) {
1394 fputs(
1395 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1396 error = 1;
1397 goto bad;
1398 }
1399
1400 error = 0;
1401 memset(&data_addr, 0, sizeof(data_addr));
1402 data_addr.su_family = AF_INET;
1403 data_addr.su_len = sizeof(struct sockaddr_in);
1404 data_addr.si_su.su_sin.sin_addr.s_addr =
1405 htonl(pack4(addr, 0));
1406 data_addr.su_port = htons(pack2(port, 0));
1407 break;
1408 #ifdef INET6
1409 case AF_INET6:
1410 error = sscanf(pasv,
1411 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1412 &af, &hal,
1413 &addr[0], &addr[1], &addr[2], &addr[3],
1414 &addr[4], &addr[5], &addr[6], &addr[7],
1415 &addr[8], &addr[9], &addr[10],
1416 &addr[11], &addr[12], &addr[13],
1417 &addr[14], &addr[15],
1418 &pal, &port[0], &port[1]);
1419 if (error != 21) {
1420 fputs(
1421 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1422 error = 1;
1423 goto bad;
1424 }
1425 if (af != 6 || hal != 16 || pal != 2) {
1426 fputs(
1427 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1428 error = 1;
1429 goto bad;
1430 }
1431
1432 error = 0;
1433 memset(&data_addr, 0, sizeof(data_addr));
1434 data_addr.su_family = AF_INET6;
1435 data_addr.su_len = sizeof(struct sockaddr_in6);
1436 {
1437 size_t i;
1438 for (i = 0; i < sizeof(struct in6_addr); i++) {
1439 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1440 UC(addr[i]);
1441 }
1442 }
1443 data_addr.su_port = htons(pack2(port, 0));
1444 break;
1445 #endif
1446 default:
1447 error = 1;
1448 }
1449 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1450 char delim[4];
1451
1452 port[0] = 0;
1453 if (code / 10 == 22 && code != 229) {
1454 fputs("wrong server: return code must be 229\n",
1455 ttyout);
1456 error = 1;
1457 goto bad;
1458 }
1459 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1460 &delim[1], &delim[2], &port[1],
1461 &delim[3]) != 5) {
1462 fputs("parse error!\n", ttyout);
1463 error = 1;
1464 goto bad;
1465 }
1466 if (delim[0] != delim[1] || delim[0] != delim[2]
1467 || delim[0] != delim[3]) {
1468 fputs("parse error!\n", ttyout);
1469 error = 1;
1470 goto bad;
1471 }
1472 data_addr = hisctladdr;
1473 data_addr.su_port = htons(port[1]);
1474 } else
1475 goto bad;
1476
1477 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
1478 data_addr.su_len, 1) < 0) {
1479 if (activefallback) {
1480 (void)close(data);
1481 data = -1;
1482 passivemode = 0;
1483 #if 0
1484 activefallback = 0;
1485 #endif
1486 goto reinit;
1487 }
1488 goto bad;
1489 }
1490 #ifdef IPTOS_THROUGHPUT
1491 if (data_addr.su_family == AF_INET) {
1492 on = IPTOS_THROUGHPUT;
1493 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1494 (void *)&on, sizeof(on)) == -1) {
1495 DWARN("setsockopt %s (ignored)",
1496 "IPTOS_THROUGHPUT");
1497 }
1498 }
1499 #endif
1500 return (0);
1501 }
1502
1503 noport:
1504 data_addr = myctladdr;
1505 if (sendport)
1506 data_addr.su_port = 0; /* let system pick one */
1507 if (data != -1)
1508 (void)close(data);
1509 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1510 if (data < 0) {
1511 warn("Can't create socket for data connection");
1512 if (tmpno)
1513 sendport = 1;
1514 return (1);
1515 }
1516 if (!sendport)
1517 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1518 (void *)&on, sizeof(on)) == -1) {
1519 warn("Can't set SO_REUSEADDR on data connection");
1520 goto bad;
1521 }
1522 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1523 data_addr.su_len) < 0) {
1524 warn("Can't bind for data connection");
1525 goto bad;
1526 }
1527 if ((options & SO_DEBUG) &&
1528 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1529 (void *)&on, sizeof(on)) == -1) {
1530 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1531 }
1532 len = sizeof(data_addr.si_su);
1533 memset((char *)&data_addr, 0, sizeof (data_addr));
1534 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
1535 warn("Can't determine my address of data connection");
1536 goto bad;
1537 }
1538 data_addr.su_len = len;
1539 if (ftp_listen(data, 1) < 0)
1540 warn("Can't listen to data connection");
1541
1542 if (sendport) {
1543 char hname[NI_MAXHOST], sname[NI_MAXSERV];
1544 struct sockinet tmp;
1545
1546 switch (data_addr.su_family) {
1547 case AF_INET:
1548 if (!epsv4 || epsv4bad) {
1549 result = COMPLETE + 1;
1550 break;
1551 }
1552 /* FALLTHROUGH */
1553 #ifdef INET6
1554 case AF_INET6:
1555 if (!epsv6 || epsv6bad) {
1556 result = COMPLETE + 1;
1557 break;
1558 }
1559 #endif
1560 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1561 tmp = data_addr;
1562 #ifdef INET6
1563 if (tmp.su_family == AF_INET6)
1564 tmp.si_su.su_sin6.sin6_scope_id = 0;
1565 #endif
1566 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1567 tmp.su_len, hname, sizeof(hname), sname,
1568 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1569 result = ERROR;
1570 } else {
1571 overbose = verbose;
1572 if (ftp_debug == 0)
1573 verbose = -1;
1574 result = command("EPRT |%u|%s|%s|", af, hname,
1575 sname);
1576 verbose = overbose;
1577 if (verbose > 0 &&
1578 (result == COMPLETE || !connected))
1579 fprintf(ttyout, "%s\n", reply_string);
1580 if (!connected)
1581 return (1);
1582 if (result != COMPLETE) {
1583 epsv4bad = 1;
1584 DPRINTF("disabling epsv4 for this "
1585 "connection\n");
1586 }
1587 }
1588 break;
1589 default:
1590 result = COMPLETE + 1;
1591 break;
1592 }
1593 if (result == COMPLETE)
1594 goto skip_port;
1595
1596 switch (data_addr.su_family) {
1597 case AF_INET:
1598 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1599 p = (char *)&data_addr.su_port;
1600 result = command("PORT %d,%d,%d,%d,%d,%d",
1601 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1602 UC(p[0]), UC(p[1]));
1603 break;
1604 #ifdef INET6
1605 case AF_INET6: {
1606 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)];
1607 uint8_t up[sizeof(data_addr.su_port)];
1608
1609 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr,
1610 sizeof(ua));
1611 memcpy(up, &data_addr.su_port, sizeof(up));
1612
1613 result = command(
1614 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1615 6, 16,
1616 ua[0], ua[1], ua[2], ua[3],
1617 ua[4], ua[5], ua[6], ua[7],
1618 ua[8], ua[9], ua[10], ua[11],
1619 ua[12], ua[13], ua[14], ua[15],
1620 2,
1621 up[0], up[1]);
1622 break;
1623 }
1624 #endif
1625 default:
1626 result = COMPLETE + 1; /* xxx */
1627 }
1628 if (!connected)
1629 return (1);
1630 skip_port:
1631
1632 if (result == ERROR && sendport == -1) {
1633 sendport = 0;
1634 tmpno = 1;
1635 goto noport;
1636 }
1637 return (result != COMPLETE);
1638 }
1639 if (tmpno)
1640 sendport = 1;
1641 #ifdef IPTOS_THROUGHPUT
1642 if (data_addr.su_family == AF_INET) {
1643 on = IPTOS_THROUGHPUT;
1644 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1645 (void *)&on, sizeof(on)) == -1) {
1646 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1647 }
1648 }
1649 #endif
1650 return (0);
1651 bad:
1652 (void)close(data);
1653 data = -1;
1654 if (tmpno)
1655 sendport = 1;
1656 return (1);
1657 }
1658
1659 FILE *
dataconn(const char * lmode)1660 dataconn(const char *lmode)
1661 {
1662 struct sockinet from;
1663 int s, flags, rv, timeout;
1664 struct timeval endtime, now, td;
1665 struct pollfd pfd[1];
1666 socklen_t fromlen;
1667
1668 if (passivemode) /* passive data connection */
1669 return (fdopen(data, lmode));
1670
1671 /* active mode data connection */
1672
1673 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1674 goto dataconn_failed; /* get current socket flags */
1675 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1676 goto dataconn_failed; /* set non-blocking connect */
1677
1678 /* NOTE: we now must restore socket flags on successful exit */
1679
1680 /* limit time waiting on listening socket */
1681 pfd[0].fd = data;
1682 pfd[0].events = POLLIN;
1683 (void)gettimeofday(&endtime, NULL); /* determine end time */
1684 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1685 /* without -q, default to 60s */
1686 do {
1687 (void)gettimeofday(&now, NULL);
1688 timersub(&endtime, &now, &td);
1689 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1690 if (timeout < 0)
1691 timeout = 0;
1692 rv = ftp_poll(pfd, 1, timeout);
1693 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1694 if (rv == -1) {
1695 warn("Can't poll waiting before accept");
1696 goto dataconn_failed;
1697 }
1698 if (rv == 0) {
1699 warnx("Poll timeout waiting before accept");
1700 goto dataconn_failed;
1701 }
1702
1703 /* (non-blocking) accept the connection */
1704 fromlen = myctladdr.su_len;
1705 do {
1706 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1707 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1708 if (s == -1) {
1709 warn("Can't accept data connection");
1710 goto dataconn_failed;
1711 }
1712
1713 (void)close(data);
1714 data = s;
1715 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1716 goto dataconn_failed;
1717
1718 #ifdef IPTOS_THROUGHPUT
1719 if (from.su_family == AF_INET) {
1720 int tos = IPTOS_THROUGHPUT;
1721 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1722 (void *)&tos, sizeof(tos)) == -1) {
1723 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1724 }
1725 }
1726 #endif
1727 return (fdopen(data, lmode));
1728
1729 dataconn_failed:
1730 (void)close(data);
1731 data = -1;
1732 return (NULL);
1733 }
1734
1735 void
psabort(int notused)1736 psabort(int notused)
1737 {
1738 int oerrno = errno;
1739
1740 sigint_raised = 1;
1741 alarmtimer(0);
1742 abrtflag++;
1743 errno = oerrno;
1744 }
1745
1746 void
pswitch(int flag)1747 pswitch(int flag)
1748 {
1749 sigfunc oldintr;
1750 static struct comvars {
1751 int connect;
1752 char name[MAXHOSTNAMELEN];
1753 struct sockinet mctl;
1754 struct sockinet hctl;
1755 FILE *in;
1756 FILE *out;
1757 int tpe;
1758 int curtpe;
1759 int cpnd;
1760 int sunqe;
1761 int runqe;
1762 int mcse;
1763 int ntflg;
1764 char nti[17];
1765 char nto[17];
1766 int mapflg;
1767 char mi[MAXPATHLEN];
1768 char mo[MAXPATHLEN];
1769 } proxstruct, tmpstruct;
1770 struct comvars *ip, *op;
1771
1772 abrtflag = 0;
1773 oldintr = xsignal(SIGINT, psabort);
1774 if (flag) {
1775 if (proxy)
1776 return;
1777 ip = &tmpstruct;
1778 op = &proxstruct;
1779 proxy++;
1780 } else {
1781 if (!proxy)
1782 return;
1783 ip = &proxstruct;
1784 op = &tmpstruct;
1785 proxy = 0;
1786 }
1787 ip->connect = connected;
1788 connected = op->connect;
1789 if (hostname)
1790 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1791 else
1792 ip->name[0] = '\0';
1793 hostname = op->name;
1794 ip->hctl = hisctladdr;
1795 hisctladdr = op->hctl;
1796 ip->mctl = myctladdr;
1797 myctladdr = op->mctl;
1798 ip->in = cin;
1799 cin = op->in;
1800 ip->out = cout;
1801 cout = op->out;
1802 ip->tpe = type;
1803 type = op->tpe;
1804 ip->curtpe = curtype;
1805 curtype = op->curtpe;
1806 ip->cpnd = cpend;
1807 cpend = op->cpnd;
1808 ip->sunqe = sunique;
1809 sunique = op->sunqe;
1810 ip->runqe = runique;
1811 runique = op->runqe;
1812 ip->mcse = mcase;
1813 mcase = op->mcse;
1814 ip->ntflg = ntflag;
1815 ntflag = op->ntflg;
1816 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1817 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1818 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1819 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1820 ip->mapflg = mapflag;
1821 mapflag = op->mapflg;
1822 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1823 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1824 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1825 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1826 (void)xsignal(SIGINT, oldintr);
1827 if (abrtflag) {
1828 abrtflag = 0;
1829 (*oldintr)(SIGINT);
1830 }
1831 }
1832
1833 __dead static void
abortpt(int notused)1834 abortpt(int notused)
1835 {
1836
1837 sigint_raised = 1;
1838 alarmtimer(0);
1839 if (fromatty)
1840 write(fileno(ttyout), "\n", 1);
1841 ptabflg++;
1842 mflag = 0;
1843 abrtflag = 0;
1844 siglongjmp(ptabort, 1);
1845 }
1846
1847 void
proxtrans(const char * cmd,const char * local,const char * remote)1848 proxtrans(const char *cmd, const char *local, const char *remote)
1849 {
1850 sigfunc volatile oldintr;
1851 int prox_type, nfnd;
1852 int volatile secndflag;
1853 const char *volatile cmd2;
1854
1855 oldintr = NULL;
1856 secndflag = 0;
1857 if (strcmp(cmd, "RETR"))
1858 cmd2 = "RETR";
1859 else
1860 cmd2 = runique ? "STOU" : "STOR";
1861 if ((prox_type = type) == 0) {
1862 if (unix_server && unix_proxy)
1863 prox_type = TYPE_I;
1864 else
1865 prox_type = TYPE_A;
1866 }
1867 if (curtype != prox_type)
1868 changetype(prox_type, 1);
1869 if (command("PASV") != COMPLETE) {
1870 fputs("proxy server does not support third party transfers.\n",
1871 ttyout);
1872 return;
1873 }
1874 pswitch(0);
1875 if (!connected) {
1876 fputs("No primary connection.\n", ttyout);
1877 pswitch(1);
1878 code = -1;
1879 return;
1880 }
1881 if (curtype != prox_type)
1882 changetype(prox_type, 1);
1883 if (command("PORT %s", pasv) != COMPLETE) {
1884 pswitch(1);
1885 return;
1886 }
1887 if (sigsetjmp(ptabort, 1))
1888 goto abort;
1889 oldintr = xsignal(SIGINT, abortpt);
1890 if ((restart_point &&
1891 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1892 || (command("%s %s", cmd, remote) != PRELIM)) {
1893 (void)xsignal(SIGINT, oldintr);
1894 pswitch(1);
1895 return;
1896 }
1897 sleep(2);
1898 pswitch(1);
1899 secndflag++;
1900 if ((restart_point &&
1901 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1902 || (command("%s %s", cmd2, local) != PRELIM))
1903 goto abort;
1904 ptflag++;
1905 (void)getreply(0);
1906 pswitch(0);
1907 (void)getreply(0);
1908 (void)xsignal(SIGINT, oldintr);
1909 pswitch(1);
1910 ptflag = 0;
1911 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1912 return;
1913 abort:
1914 if (sigsetjmp(xferabort, 1)) {
1915 (void)xsignal(SIGINT, oldintr);
1916 return;
1917 }
1918 (void)xsignal(SIGINT, abort_squared);
1919 ptflag = 0;
1920 if (strcmp(cmd, "RETR") && !proxy)
1921 pswitch(1);
1922 else if (!strcmp(cmd, "RETR") && proxy)
1923 pswitch(0);
1924 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1925 if (command("%s %s", cmd2, local) != PRELIM) {
1926 pswitch(0);
1927 if (cpend)
1928 abort_remote(NULL);
1929 }
1930 pswitch(1);
1931 if (ptabflg)
1932 code = -1;
1933 (void)xsignal(SIGINT, oldintr);
1934 return;
1935 }
1936 if (cpend)
1937 abort_remote(NULL);
1938 pswitch(!proxy);
1939 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1940 if (command("%s %s", cmd2, local) != PRELIM) {
1941 pswitch(0);
1942 if (cpend)
1943 abort_remote(NULL);
1944 pswitch(1);
1945 if (ptabflg)
1946 code = -1;
1947 (void)xsignal(SIGINT, oldintr);
1948 return;
1949 }
1950 }
1951 if (cpend)
1952 abort_remote(NULL);
1953 pswitch(!proxy);
1954 if (cpend) {
1955 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1956 if (nfnd < 0)
1957 warn("Error aborting proxy command");
1958 if (ptabflg)
1959 code = -1;
1960 lostpeer(0);
1961 }
1962 (void)getreply(0);
1963 (void)getreply(0);
1964 }
1965 if (proxy)
1966 pswitch(0);
1967 pswitch(1);
1968 if (ptabflg)
1969 code = -1;
1970 (void)xsignal(SIGINT, oldintr);
1971 }
1972
1973 void
reset(int argc,char * argv[])1974 reset(int argc, char *argv[])
1975 {
1976 int nfnd = 1;
1977
1978 if (argc == 0 && argv != NULL) {
1979 UPRINTF("usage: %s\n", argv[0]);
1980 code = -1;
1981 return;
1982 }
1983 while (nfnd > 0) {
1984 if ((nfnd = empty(cin, NULL, 0)) < 0) {
1985 warn("Error resetting connection");
1986 code = -1;
1987 lostpeer(0);
1988 } else if (nfnd)
1989 (void)getreply(0);
1990 }
1991 }
1992
1993 char *
gunique(const char * local)1994 gunique(const char *local)
1995 {
1996 static char new[MAXPATHLEN];
1997 char *cp = strrchr(local, '/');
1998 int d, count=0, len;
1999 char ext = '1';
2000
2001 if (cp)
2002 *cp = '\0';
2003 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
2004 if (cp)
2005 *cp = '/';
2006 if (d < 0) {
2007 warn("Can't access `%s'", local);
2008 return (NULL);
2009 }
2010 len = strlcpy(new, local, sizeof(new));
2011 cp = &new[len];
2012 *cp++ = '.';
2013 while (!d) {
2014 if (++count == 100) {
2015 fputs("runique: can't find unique file name.\n",
2016 ttyout);
2017 return (NULL);
2018 }
2019 *cp++ = ext;
2020 *cp = '\0';
2021 if (ext == '9')
2022 ext = '0';
2023 else
2024 ext++;
2025 if ((d = access(new, F_OK)) < 0)
2026 break;
2027 if (ext != '0')
2028 cp--;
2029 else if (*(cp - 2) == '.')
2030 *(cp - 1) = '1';
2031 else {
2032 *(cp - 2) = *(cp - 2) + 1;
2033 cp--;
2034 }
2035 }
2036 return (new);
2037 }
2038
2039 /*
2040 * abort_squared --
2041 * aborts abort_remote(). lostpeer() is called because if the user is
2042 * too impatient to wait or there's another problem then ftp really
2043 * needs to get back to a known state.
2044 */
2045 static void
abort_squared(int dummy)2046 abort_squared(int dummy)
2047 {
2048 char msgbuf[100];
2049 size_t len;
2050
2051 sigint_raised = 1;
2052 alarmtimer(0);
2053 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2054 sizeof(msgbuf));
2055 write(fileno(ttyout), msgbuf, len);
2056 lostpeer(0);
2057 siglongjmp(xferabort, 1);
2058 }
2059
2060 void
abort_remote(FILE * din)2061 abort_remote(FILE *din)
2062 {
2063 char buf[BUFSIZ];
2064 int nfnd;
2065
2066 if (cout == NULL) {
2067 warnx("Lost control connection for abort");
2068 if (ptabflg)
2069 code = -1;
2070 lostpeer(0);
2071 return;
2072 }
2073 /*
2074 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2075 * after urgent byte rather than before as is protocol now
2076 */
2077 buf[0] = IAC;
2078 buf[1] = IP;
2079 buf[2] = IAC;
2080 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
2081 warn("Can't send abort message");
2082 fprintf(cout, "%cABOR\r\n", DM);
2083 (void)fflush(cout);
2084 if ((nfnd = empty(cin, din, 10)) <= 0) {
2085 if (nfnd < 0)
2086 warn("Can't send abort message");
2087 if (ptabflg)
2088 code = -1;
2089 lostpeer(0);
2090 }
2091 if (din && (nfnd & 2)) {
2092 while (read(fileno(din), buf, BUFSIZ) > 0)
2093 continue;
2094 }
2095 if (getreply(0) == ERROR && code == 552) {
2096 /* 552 needed for nic style abort */
2097 (void)getreply(0);
2098 }
2099 (void)getreply(0);
2100 }
2101
2102 /*
2103 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2104 * IPv4 mapped address complicates too many things in FTP
2105 * protocol handling, as FTP protocol is defined differently
2106 * between IPv4 and IPv6.
2107 *
2108 * This may not be the best way to handle this situation,
2109 * since the semantics of IPv4 mapped address is defined in
2110 * the kernel. There are configurations where we should use
2111 * IPv4 mapped address as native IPv6 address, not as
2112 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2113 *
2114 * More complete solution would be to have an additional
2115 * getsockopt to grab "real" peername/sockname. "real"
2116 * peername/sockname will be AF_INET if IPv4 mapped address
2117 * is used to embed IPv4 address, and will be AF_INET6 if
2118 * we use it as native. What a mess!
2119 */
2120 void
ai_unmapped(struct addrinfo * ai)2121 ai_unmapped(struct addrinfo *ai)
2122 {
2123 #ifdef INET6
2124 struct sockaddr_in6 *sin6;
2125 struct sockaddr_in sin;
2126 socklen_t len;
2127
2128 if (ai->ai_family != AF_INET6)
2129 return;
2130 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2131 sizeof(sin) > ai->ai_addrlen)
2132 return;
2133 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2134 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2135 return;
2136
2137 memset(&sin, 0, sizeof(sin));
2138 sin.sin_family = AF_INET;
2139 len = sizeof(struct sockaddr_in);
2140 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2141 sizeof(sin.sin_addr));
2142 sin.sin_port = sin6->sin6_port;
2143
2144 ai->ai_family = AF_INET;
2145 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN)
2146 sin.sin_len = len;
2147 #endif
2148 memcpy(ai->ai_addr, &sin, len);
2149 ai->ai_addrlen = len;
2150 #endif
2151 }
2152
2153 #ifdef NO_USAGE
2154 void
xusage(void)2155 xusage(void)
2156 {
2157 fputs("Usage error\n", ttyout);
2158 }
2159 #endif
2160