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Replace the nologin shell script with a tiny c version. Just for the sake
[dragonfly/netmp.git] / contrib / tnftp / ftp.c
blobaa44ff45f384cafa1c2b1f6d2c2a858f2e55e558
1 /* $NetBSD: ftp.c,v 1.152 2007/07/22 05:02:50 lukem Exp $ */
2
3 /*-
4 * Copyright (c) 1996-2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Luke Mewburn.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the NetBSD
21 * Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 * contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39 /*
40 * Copyright (c) 1985, 1989, 1993, 1994
41 * The Regents of the University of California. All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. Neither the name of the University nor the names of its contributors
52 * may be used to endorse or promote products derived from this software
53 * without specific prior written permission.
54 *
55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
65 * SUCH DAMAGE.
66 */
67
68 /*
69 * Copyright (C) 1997 and 1998 WIDE Project.
70 * All rights reserved.
71 *
72 * Redistribution and use in source and binary forms, with or without
73 * modification, are permitted provided that the following conditions
74 * are met:
75 * 1. Redistributions of source code must retain the above copyright
76 * notice, this list of conditions and the following disclaimer.
77 * 2. Redistributions in binary form must reproduce the above copyright
78 * notice, this list of conditions and the following disclaimer in the
79 * documentation and/or other materials provided with the distribution.
80 * 3. Neither the name of the project nor the names of its contributors
81 * may be used to endorse or promote products derived from this software
82 * without specific prior written permission.
83 *
84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
94 * SUCH DAMAGE.
95 */
96
97 #include <sys/cdefs.h>
98 #ifndef lint
99 #if 0
100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94";
101 #else
102 __RCSID("$NetBSD: ftp.c,v 1.152 2007/07/22 05:02:50 lukem Exp $");
103 #endif
104 #endif /* not lint */
105
106 #include <sys/types.h>
107 #include <sys/stat.h>
108 #include <sys/socket.h>
109 #include <sys/time.h>
110
111 #include <netinet/in.h>
112 #include <netinet/in_systm.h>
113 #include <netinet/ip.h>
114 #include <arpa/inet.h>
115 #include <arpa/ftp.h>
116 #include <arpa/telnet.h>
117
118 #include <ctype.h>
119 #include <err.h>
120 #include <errno.h>
121 #include <fcntl.h>
122 #include <netdb.h>
123 #include <stdio.h>
124 #include <stdlib.h>
125 #include <string.h>
126 #include <time.h>
127 #include <unistd.h>
128 #include <stdarg.h>
129
130 #include "ftp_var.h"
131
132 volatile sig_atomic_t abrtflag;
133 volatile sig_atomic_t timeoutflag;
134
135 sigjmp_buf ptabort;
136 int ptabflg;
137 int ptflag = 0;
138 char pasv[BUFSIZ]; /* passive port for proxy data connection */
139
140 static int empty(FILE *, FILE *, int);
141
142 struct sockinet {
143 union sockunion {
144 struct sockaddr_in su_sin;
145 #ifdef INET6
146 struct sockaddr_in6 su_sin6;
147 #endif
148 } si_su;
149 #if !defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
150 int si_len;
151 #endif
152 };
153
154 #if !defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
155 # define su_len si_len
156 #else
157 # define su_len si_su.su_sin.sin_len
158 #endif
159 #define su_family si_su.su_sin.sin_family
160 #define su_port si_su.su_sin.sin_port
161
162 struct sockinet myctladdr, hisctladdr, data_addr;
163
164 char *
165 hookup(char *host, char *port)
166 {
167 int s = -1, error, portnum;
168 struct addrinfo hints, *res, *res0;
169 char hbuf[MAXHOSTNAMELEN];
170 static char hostnamebuf[MAXHOSTNAMELEN];
171 socklen_t len;
172 int on = 1;
173
174 memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
175 memset((char *)&myctladdr, 0, sizeof (myctladdr));
176 memset(&hints, 0, sizeof(hints));
177 portnum = parseport(port, FTP_PORT);
178 hints.ai_flags = AI_CANONNAME;
179 hints.ai_family = family;
180 hints.ai_socktype = SOCK_STREAM;
181 hints.ai_protocol = 0;
182 error = getaddrinfo(host, NULL, &hints, &res0);
183 if (error) {
184 warnx("Can't lookup `%s': %s", host,
185 (error == EAI_SYSTEM) ? strerror(errno)
186 : gai_strerror(error));
187 code = -1;
188 return (0);
189 }
190
191 if (res0->ai_canonname)
192 (void)strlcpy(hostnamebuf, res0->ai_canonname,
193 sizeof(hostnamebuf));
194 else
195 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
196 hostname = hostnamebuf;
197
198 for (res = res0; res; res = res->ai_next) {
199 ai_unmapped(res);
200 if (getnameinfo(res->ai_addr, res->ai_addrlen,
201 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
202 strlcpy(hbuf, "?", sizeof(hbuf));
203 if (verbose && res0->ai_next) {
204 /* if we have multiple possibilities */
205 fprintf(ttyout, "Trying %s...\n", hbuf);
206 }
207 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum);
208 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
209 if (s < 0) {
210 warn("Can't create socket for connection to `%s'",
211 hbuf);
212 continue;
213 }
214 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) {
215 close(s);
216 s = -1;
217 continue;
218 }
219
220 /* finally we got one */
221 break;
222 }
223 if (s < 0) {
224 warnx("Can't connect to `%s'", host);
225 code = -1;
226 freeaddrinfo(res0);
227 return 0;
228 }
229 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
230 hisctladdr.su_len = res->ai_addrlen;
231 freeaddrinfo(res0);
232 res0 = res = NULL;
233
234 len = hisctladdr.su_len;
235 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
236 warn("Can't determine my address of connection to `%s'", host);
237 code = -1;
238 goto bad;
239 }
240 myctladdr.su_len = len;
241
242 #ifdef IPTOS_LOWDELAY
243 if (hisctladdr.su_family == AF_INET) {
244 int tos = IPTOS_LOWDELAY;
245 if (setsockopt(s, IPPROTO_IP, IP_TOS,
246 (void *)&tos, sizeof(tos)) == -1) {
247 DWARN("setsockopt %s (ignored)",
248 "IPTOS_LOWDELAY");
249 }
250 }
251 #endif
252 cin = fdopen(s, "r");
253 cout = fdopen(s, "w");
254 if (cin == NULL || cout == NULL) {
255 warnx("Can't fdopen socket");
256 if (cin)
257 (void)fclose(cin);
258 if (cout)
259 (void)fclose(cout);
260 code = -1;
261 goto bad;
262 }
263 if (verbose)
264 fprintf(ttyout, "Connected to %s.\n", hostname);
265 if (getreply(0) > 2) { /* read startup message from server */
266 if (cin)
267 (void)fclose(cin);
268 if (cout)
269 (void)fclose(cout);
270 code = -1;
271 goto bad;
272 }
273
274 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
275 (void *)&on, sizeof(on)) == -1) {
276 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
277 }
278
279 return (hostname);
280 bad:
281 (void)close(s);
282 return (NULL);
283 }
284
285 void
286 cmdabort(int notused)
287 {
288 int oerrno = errno;
289
290 sigint_raised = 1;
291 alarmtimer(0);
292 if (fromatty)
293 write(fileno(ttyout), "\n", 1);
294 abrtflag++;
295 if (ptflag)
296 siglongjmp(ptabort, 1);
297 errno = oerrno;
298 }
299
300 void
301 cmdtimeout(int notused)
302 {
303 int oerrno = errno;
304
305 alarmtimer(0);
306 if (fromatty)
307 write(fileno(ttyout), "\n", 1);
308 timeoutflag++;
309 if (ptflag)
310 siglongjmp(ptabort, 1);
311 errno = oerrno;
312 }
313
314 /*VARARGS*/
315 int
316 command(const char *fmt, ...)
317 {
318 va_list ap;
319 int r;
320 sigfunc oldsigint;
321
322 #ifndef NO_DEBUG
323 if (ftp_debug) {
324 fputs("---> ", ttyout);
325 va_start(ap, fmt);
326 if (strncmp("PASS ", fmt, 5) == 0)
327 fputs("PASS XXXX", ttyout);
328 else if (strncmp("ACCT ", fmt, 5) == 0)
329 fputs("ACCT XXXX", ttyout);
330 else
331 vfprintf(ttyout, fmt, ap);
332 va_end(ap);
333 putc('\n', ttyout);
334 }
335 #endif
336 if (cout == NULL) {
337 warnx("No control connection for command");
338 code = -1;
339 return (0);
340 }
341
342 abrtflag = 0;
343
344 oldsigint = xsignal(SIGINT, cmdabort);
345
346 va_start(ap, fmt);
347 vfprintf(cout, fmt, ap);
348 va_end(ap);
349 fputs("\r\n", cout);
350 (void)fflush(cout);
351 cpend = 1;
352 r = getreply(!strcmp(fmt, "QUIT"));
353 if (abrtflag && oldsigint != SIG_IGN)
354 (*oldsigint)(SIGINT);
355 (void)xsignal(SIGINT, oldsigint);
356 return (r);
357 }
358
359 static const char *m421[] = {
360 "remote server timed out. Connection closed",
361 "user interrupt. Connection closed",
362 "remote server has closed connection",
363 };
364
365 int
366 getreply(int expecteof)
367 {
368 char current_line[BUFSIZ]; /* last line of previous reply */
369 int c, n, line;
370 int dig;
371 int originalcode = 0, continuation = 0;
372 sigfunc oldsigint, oldsigalrm;
373 int pflag = 0;
374 char *cp, *pt = pasv;
375
376 abrtflag = 0;
377 timeoutflag = 0;
378
379 oldsigint = xsignal(SIGINT, cmdabort);
380 oldsigalrm = xsignal(SIGALRM, cmdtimeout);
381
382 for (line = 0 ;; line++) {
383 dig = n = code = 0;
384 cp = current_line;
385 while (alarmtimer(quit_time ? quit_time : 60),
386 ((c = getc(cin)) != '\n')) {
387 if (c == IAC) { /* handle telnet commands */
388 switch (c = getc(cin)) {
389 case WILL:
390 case WONT:
391 c = getc(cin);
392 fprintf(cout, "%c%c%c", IAC, DONT, c);
393 (void)fflush(cout);
394 break;
395 case DO:
396 case DONT:
397 c = getc(cin);
398 fprintf(cout, "%c%c%c", IAC, WONT, c);
399 (void)fflush(cout);
400 break;
401 default:
402 break;
403 }
404 continue;
405 }
406 dig++;
407 if (c == EOF) {
408 /*
409 * these will get trashed by pswitch()
410 * in lostpeer()
411 */
412 int reply_timeoutflag = timeoutflag;
413 int reply_abrtflag = abrtflag;
414
415 alarmtimer(0);
416 if (expecteof && feof(cin)) {
417 (void)xsignal(SIGINT, oldsigint);
418 (void)xsignal(SIGALRM, oldsigalrm);
419 code = 221;
420 return (0);
421 }
422 cpend = 0;
423 lostpeer(0);
424 if (verbose) {
425 size_t midx;
426 if (reply_timeoutflag)
427 midx = 0;
428 else if (reply_abrtflag)
429 midx = 1;
430 else
431 midx = 2;
432 (void)fprintf(ttyout,
433 "421 Service not available, %s.\n", m421[midx]);
434 (void)fflush(ttyout);
435 }
436 code = 421;
437 (void)xsignal(SIGINT, oldsigint);
438 (void)xsignal(SIGALRM, oldsigalrm);
439 return (4);
440 }
441 if (c != '\r' && (verbose > 0 ||
442 ((verbose > -1 && n == '5' && dig > 4) &&
443 (((!n && c < '5') || (n && n < '5'))
444 || !retry_connect)))) {
445 if (proxflag &&
446 (dig == 1 || (dig == 5 && verbose == 0)))
447 fprintf(ttyout, "%s:", hostname);
448 (void)putc(c, ttyout);
449 }
450 if (dig < 4 && isdigit(c))
451 code = code * 10 + (c - '0');
452 if (!pflag && (code == 227 || code == 228))
453 pflag = 1;
454 else if (!pflag && code == 229)
455 pflag = 100;
456 if (dig > 4 && pflag == 1 && isdigit(c))
457 pflag = 2;
458 if (pflag == 2) {
459 if (c != '\r' && c != ')') {
460 if (pt < &pasv[sizeof(pasv) - 1])
461 *pt++ = c;
462 } else {
463 *pt = '\0';
464 pflag = 3;
465 }
466 }
467 if (pflag == 100 && c == '(')
468 pflag = 2;
469 if (dig == 4 && c == '-') {
470 if (continuation)
471 code = 0;
472 continuation++;
473 }
474 if (n == 0)
475 n = c;
476 if (cp < &current_line[sizeof(current_line) - 1])
477 *cp++ = c;
478 }
479 if (verbose > 0 || ((verbose > -1 && n == '5') &&
480 (n < '5' || !retry_connect))) {
481 (void)putc(c, ttyout);
482 (void)fflush(ttyout);
483 }
484 if (cp[-1] == '\r')
485 cp[-1] = '\0';
486 *cp = '\0';
487 if (line == 0)
488 (void)strlcpy(reply_string, current_line,
489 sizeof(reply_string));
490 if (line > 0 && code == 0 && reply_callback != NULL)
491 (*reply_callback)(current_line);
492 if (continuation && code != originalcode) {
493 if (originalcode == 0)
494 originalcode = code;
495 continue;
496 }
497 if (n != '1')
498 cpend = 0;
499 alarmtimer(0);
500 (void)xsignal(SIGINT, oldsigint);
501 (void)xsignal(SIGALRM, oldsigalrm);
502 if (code == 421 || originalcode == 421)
503 lostpeer(0);
504 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
505 (*oldsigint)(SIGINT);
506 if (timeoutflag && oldsigalrm != cmdtimeout &&
507 oldsigalrm != SIG_IGN)
508 (*oldsigalrm)(SIGINT);
509 return (n - '0');
510 }
511 }
512
513 static int
514 empty(FILE *cin, FILE *din, int sec)
515 {
516 int nr, nfd;
517 struct pollfd pfd[2];
518
519 nfd = 0;
520 if (cin) {
521 pfd[nfd].fd = fileno(cin);
522 pfd[nfd++].events = POLLIN;
523 }
524
525 if (din) {
526 pfd[nfd].fd = fileno(din);
527 pfd[nfd++].events = POLLIN;
528 }
529
530 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
531 return nr;
532
533 nr = 0;
534 nfd = 0;
535 if (cin)
536 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
537 if (din)
538 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
539 return nr;
540 }
541
542 sigjmp_buf xferabort;
543
544 void
545 abortxfer(int notused)
546 {
547 char msgbuf[100];
548 size_t len;
549
550 sigint_raised = 1;
551 alarmtimer(0);
552 mflag = 0;
553 abrtflag = 0;
554 switch (direction[0]) {
555 case 'r':
556 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
557 break;
558 case 's':
559 strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
560 break;
561 default:
562 errx(1, "abortxfer: unknown direction `%s'", direction);
563 }
564 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
565 sizeof(msgbuf));
566 write(fileno(ttyout), msgbuf, len);
567 siglongjmp(xferabort, 1);
568 }
569
570 /*
571 * Read data from infd & write to outfd, using buf/bufsize as the temporary
572 * buffer, dealing with short writes.
573 * If rate_limit != 0, rate-limit the transfer.
574 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes.
575 * Updates global variables: bytes.
576 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error.
577 * In the case of error, errno contains the appropriate error code.
578 */
579 static int
580 copy_bytes(int infd, int outfd, char *buf, size_t bufsize,
581 int rate_limit, int hash_interval)
582 {
583 volatile off_t hashc;
584 ssize_t inc, outc;
585 char *bufp;
586 struct timeval tvthen, tvnow, tvdiff;
587 off_t bufrem, bufchunk;
588 int serr;
589
590 hashc = hash_interval;
591 if (rate_limit)
592 bufchunk = rate_limit;
593 else
594 bufchunk = bufsize;
595
596 while (1) {
597 if (rate_limit) {
598 (void)gettimeofday(&tvthen, NULL);
599 }
600 errno = 0;
601 inc = outc = 0;
602 /* copy bufchunk at a time */
603 bufrem = bufchunk;
604 while (bufrem > 0) {
605 inc = read(infd, buf, MIN(bufsize, bufrem));
606 if (inc <= 0)
607 goto copy_done;
608 bytes += inc;
609 bufrem -= inc;
610 bufp = buf;
611 while (inc > 0) {
612 outc = write(outfd, bufp, inc);
613 if (outc < 0)
614 goto copy_done;
615 inc -= outc;
616 bufp += outc;
617 }
618 if (hash_interval) {
619 while (bytes >= hashc) {
620 (void)putc('#', ttyout);
621 hashc += hash_interval;
622 }
623 (void)fflush(ttyout);
624 }
625 }
626 if (rate_limit) { /* rate limited; wait if necessary */
627 while (1) {
628 (void)gettimeofday(&tvnow, NULL);
629 timersub(&tvnow, &tvthen, &tvdiff);
630 if (tvdiff.tv_sec > 0)
631 break;
632 usleep(1000000 - tvdiff.tv_usec);
633 }
634 }
635 }
636
637 copy_done:
638 serr = errno;
639 if (hash_interval && bytes > 0) {
640 if (bytes < hash_interval)
641 (void)putc('#', ttyout);
642 (void)putc('\n', ttyout);
643 (void)fflush(ttyout);
644 }
645 errno = serr;
646 if (inc == -1)
647 return 1;
648 if (outc == -1)
649 return 2;
650
651 return 0;
652 }
653
654 void
655 sendrequest(const char *cmd, const char *local, const char *remote,
656 int printnames)
657 {
658 struct stat st;
659 int c;
660 FILE *volatile fin;
661 FILE *volatile dout;
662 int (*volatile closefunc)(FILE *);
663 sigfunc volatile oldintr;
664 sigfunc volatile oldintp;
665 off_t volatile hashbytes;
666 int hash_interval;
667 char *volatile lmode;
668 static size_t bufsize;
669 static char *buf;
670 int oprogress;
671
672 hashbytes = mark;
673 direction = "sent";
674 dout = NULL;
675 bytes = 0;
676 filesize = -1;
677 oprogress = progress;
678 if (verbose && printnames) {
679 if (*local != '-')
680 fprintf(ttyout, "local: %s ", local);
681 if (remote)
682 fprintf(ttyout, "remote: %s\n", remote);
683 }
684 if (proxy) {
685 proxtrans(cmd, local, remote);
686 return;
687 }
688 if (curtype != type)
689 changetype(type, 0);
690 closefunc = NULL;
691 oldintr = NULL;
692 oldintp = NULL;
693 lmode = "w";
694 if (sigsetjmp(xferabort, 1)) {
695 while (cpend)
696 (void)getreply(0);
697 code = -1;
698 goto cleanupsend;
699 }
700 (void)xsignal(SIGQUIT, psummary);
701 oldintr = xsignal(SIGINT, abortxfer);
702 if (strcmp(local, "-") == 0) {
703 fin = stdin;
704 progress = 0;
705 } else if (*local == '|') {
706 oldintp = xsignal(SIGPIPE, SIG_IGN);
707 fin = popen(local + 1, "r");
708 if (fin == NULL) {
709 warn("Can't execute `%s'", local + 1);
710 code = -1;
711 goto cleanupsend;
712 }
713 progress = 0;
714 closefunc = pclose;
715 } else {
716 fin = fopen(local, "r");
717 if (fin == NULL) {
718 warn("Can't open `%s'", local);
719 code = -1;
720 goto cleanupsend;
721 }
722 closefunc = fclose;
723 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
724 fprintf(ttyout, "%s: not a plain file.\n", local);
725 code = -1;
726 goto cleanupsend;
727 }
728 filesize = st.st_size;
729 }
730 if (initconn()) {
731 code = -1;
732 goto cleanupsend;
733 }
734 if (sigsetjmp(xferabort, 1))
735 goto abort;
736
737 if (restart_point &&
738 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
739 int rc;
740
741 rc = -1;
742 switch (curtype) {
743 case TYPE_A:
744 rc = fseeko(fin, restart_point, SEEK_SET);
745 break;
746 case TYPE_I:
747 case TYPE_L:
748 rc = lseek(fileno(fin), restart_point, SEEK_SET);
749 break;
750 }
751 if (rc < 0) {
752 warn("Can't seek to restart `%s'", local);
753 goto cleanupsend;
754 }
755 if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
756 goto cleanupsend;
757 lmode = "r+";
758 }
759 if (remote) {
760 if (command("%s %s", cmd, remote) != PRELIM)
761 goto cleanupsend;
762 } else {
763 if (command("%s", cmd) != PRELIM)
764 goto cleanupsend;
765 }
766 dirchange = 1;
767 dout = dataconn(lmode);
768 if (dout == NULL)
769 goto abort;
770
771 if (sndbuf_size > bufsize) {
772 if (buf)
773 (void)free(buf);
774 bufsize = sndbuf_size;
775 buf = ftp_malloc(bufsize);
776 }
777
778 progressmeter(-1);
779 oldintp = xsignal(SIGPIPE, SIG_IGN);
780 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
781
782 switch (curtype) {
783
784 case TYPE_I:
785 case TYPE_L:
786 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize,
787 rate_put, hash_interval);
788 if (c == 1) {
789 warn("Reading `%s'", local);
790 } else if (c == 2) {
791 if (errno != EPIPE)
792 warn("Writing to network");
793 bytes = -1;
794 }
795 break;
796
797 case TYPE_A:
798 while ((c = getc(fin)) != EOF) {
799 if (c == '\n') {
800 while (hash_interval && bytes >= hashbytes) {
801 (void)putc('#', ttyout);
802 (void)fflush(ttyout);
803 hashbytes += mark;
804 }
805 if (ferror(dout))
806 break;
807 (void)putc('\r', dout);
808 bytes++;
809 }
810 (void)putc(c, dout);
811 bytes++;
812 #if 0 /* this violates RFC0959 */
813 if (c == '\r') {
814 (void)putc('\0', dout);
815 bytes++;
816 }
817 #endif
818 }
819 if (hash_interval) {
820 if (bytes < hashbytes)
821 (void)putc('#', ttyout);
822 (void)putc('\n', ttyout);
823 }
824 if (ferror(fin))
825 warn("Reading `%s'", local);
826 if (ferror(dout)) {
827 if (errno != EPIPE)
828 warn("Writing to network");
829 bytes = -1;
830 }
831 break;
832 }
833
834 progressmeter(1);
835 if (closefunc != NULL) {
836 (*closefunc)(fin);
837 fin = NULL;
838 }
839 (void)fclose(dout);
840 dout = NULL;
841 (void)getreply(0);
842 if (bytes > 0)
843 ptransfer(0);
844 goto cleanupsend;
845
846 abort:
847 (void)xsignal(SIGINT, oldintr);
848 oldintr = NULL;
849 if (!cpend) {
850 code = -1;
851 goto cleanupsend;
852 }
853 if (data >= 0) {
854 (void)close(data);
855 data = -1;
856 }
857 if (dout) {
858 (void)fclose(dout);
859 dout = NULL;
860 }
861 (void)getreply(0);
862 code = -1;
863 if (bytes > 0)
864 ptransfer(0);
865
866 cleanupsend:
867 if (oldintr)
868 (void)xsignal(SIGINT, oldintr);
869 if (oldintp)
870 (void)xsignal(SIGPIPE, oldintp);
871 if (data >= 0) {
872 (void)close(data);
873 data = -1;
874 }
875 if (closefunc != NULL && fin != NULL)
876 (*closefunc)(fin);
877 if (dout)
878 (void)fclose(dout);
879 progress = oprogress;
880 restart_point = 0;
881 bytes = 0;
882 }
883
884 void
885 recvrequest(const char *cmd, const char *volatile local, const char *remote,
886 const char *lmode, int printnames, int ignorespecial)
887 {
888 FILE *volatile fout;
889 FILE *volatile din;
890 int (*volatile closefunc)(FILE *);
891 sigfunc volatile oldintr;
892 sigfunc volatile oldintp;
893 int c, d;
894 int volatile is_retr;
895 int volatile tcrflag;
896 int volatile bare_lfs;
897 static size_t bufsize;
898 static char *buf;
899 off_t volatile hashbytes;
900 int hash_interval;
901 struct stat st;
902 time_t mtime;
903 struct timeval tval[2];
904 int oprogress;
905 int opreserve;
906
907 fout = NULL;
908 din = NULL;
909 hashbytes = mark;
910 direction = "received";
911 bytes = 0;
912 bare_lfs = 0;
913 filesize = -1;
914 oprogress = progress;
915 opreserve = preserve;
916 is_retr = (strcmp(cmd, "RETR") == 0);
917 if (is_retr && verbose && printnames) {
918 if (ignorespecial || *local != '-')
919 fprintf(ttyout, "local: %s ", local);
920 if (remote)
921 fprintf(ttyout, "remote: %s\n", remote);
922 }
923 if (proxy && is_retr) {
924 proxtrans(cmd, local, remote);
925 return;
926 }
927 closefunc = NULL;
928 oldintr = NULL;
929 oldintp = NULL;
930 tcrflag = !crflag && is_retr;
931 if (sigsetjmp(xferabort, 1)) {
932 while (cpend)
933 (void)getreply(0);
934 code = -1;
935 goto cleanuprecv;
936 }
937 (void)xsignal(SIGQUIT, psummary);
938 oldintr = xsignal(SIGINT, abortxfer);
939 if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
940 if (access(local, W_OK) < 0) {
941 char *dir = strrchr(local, '/');
942
943 if (errno != ENOENT && errno != EACCES) {
944 warn("Can't access `%s'", local);
945 code = -1;
946 goto cleanuprecv;
947 }
948 if (dir != NULL)
949 *dir = 0;
950 d = access(dir == local ? "/" :
951 dir ? local : ".", W_OK);
952 if (dir != NULL)
953 *dir = '/';
954 if (d < 0) {
955 warn("Can't access `%s'", local);
956 code = -1;
957 goto cleanuprecv;
958 }
959 if (!runique && errno == EACCES &&
960 chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
961 warn("Can't chmod `%s'", local);
962 code = -1;
963 goto cleanuprecv;
964 }
965 if (runique && errno == EACCES &&
966 (local = gunique(local)) == NULL) {
967 code = -1;
968 goto cleanuprecv;
969 }
970 }
971 else if (runique && (local = gunique(local)) == NULL) {
972 code = -1;
973 goto cleanuprecv;
974 }
975 }
976 if (!is_retr) {
977 if (curtype != TYPE_A)
978 changetype(TYPE_A, 0);
979 } else {
980 if (curtype != type)
981 changetype(type, 0);
982 filesize = remotesize(remote, 0);
983 if (code == 421 || code == -1)
984 goto cleanuprecv;
985 }
986 if (initconn()) {
987 code = -1;
988 goto cleanuprecv;
989 }
990 if (sigsetjmp(xferabort, 1))
991 goto abort;
992 if (is_retr && restart_point &&
993 command("REST " LLF, (LLT) restart_point) != CONTINUE)
994 goto cleanuprecv;
995 if (! EMPTYSTRING(remote)) {
996 if (command("%s %s", cmd, remote) != PRELIM)
997 goto cleanuprecv;
998 } else {
999 if (command("%s", cmd) != PRELIM)
1000 goto cleanuprecv;
1001 }
1002 din = dataconn("r");
1003 if (din == NULL)
1004 goto abort;
1005 if (!ignorespecial && strcmp(local, "-") == 0) {
1006 fout = stdout;
1007 progress = 0;
1008 preserve = 0;
1009 } else if (!ignorespecial && *local == '|') {
1010 oldintp = xsignal(SIGPIPE, SIG_IGN);
1011 fout = popen(local + 1, "w");
1012 if (fout == NULL) {
1013 warn("Can't execute `%s'", local+1);
1014 goto abort;
1015 }
1016 progress = 0;
1017 preserve = 0;
1018 closefunc = pclose;
1019 } else {
1020 fout = fopen(local, lmode);
1021 if (fout == NULL) {
1022 warn("Can't open `%s'", local);
1023 goto abort;
1024 }
1025 closefunc = fclose;
1026 }
1027
1028 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
1029 progress = 0;
1030 preserve = 0;
1031 }
1032 if (rcvbuf_size > bufsize) {
1033 if (buf)
1034 (void)free(buf);
1035 bufsize = rcvbuf_size;
1036 buf = ftp_malloc(bufsize);
1037 }
1038
1039 progressmeter(-1);
1040 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0;
1041
1042 switch (curtype) {
1043
1044 case TYPE_I:
1045 case TYPE_L:
1046 if (is_retr && restart_point &&
1047 lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
1048 warn("Can't seek to restart `%s'", local);
1049 goto cleanuprecv;
1050 }
1051 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize,
1052 rate_get, hash_interval);
1053 if (c == 1) {
1054 if (errno != EPIPE)
1055 warn("Reading from network");
1056 bytes = -1;
1057 } else if (c == 2) {
1058 warn("Writing `%s'", local);
1059 }
1060 break;
1061
1062 case TYPE_A:
1063 if (is_retr && restart_point) {
1064 int ch;
1065 off_t i;
1066
1067 if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
1068 goto done;
1069 for (i = 0; i++ < restart_point;) {
1070 if ((ch = getc(fout)) == EOF)
1071 goto done;
1072 if (ch == '\n')
1073 i++;
1074 }
1075 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
1076 done:
1077 warn("Can't seek to restart `%s'", local);
1078 goto cleanuprecv;
1079 }
1080 }
1081 while ((c = getc(din)) != EOF) {
1082 if (c == '\n')
1083 bare_lfs++;
1084 while (c == '\r') {
1085 while (hash_interval && bytes >= hashbytes) {
1086 (void)putc('#', ttyout);
1087 (void)fflush(ttyout);
1088 hashbytes += mark;
1089 }
1090 bytes++;
1091 if ((c = getc(din)) != '\n' || tcrflag) {
1092 if (ferror(fout))
1093 goto break2;
1094 (void)putc('\r', fout);
1095 if (c == '\0') {
1096 bytes++;
1097 goto contin2;
1098 }
1099 if (c == EOF)
1100 goto contin2;
1101 }
1102 }
1103 (void)putc(c, fout);
1104 bytes++;
1105 contin2: ;
1106 }
1107 break2:
1108 if (hash_interval) {
1109 if (bytes < hashbytes)
1110 (void)putc('#', ttyout);
1111 (void)putc('\n', ttyout);
1112 }
1113 if (ferror(din)) {
1114 if (errno != EPIPE)
1115 warn("Reading from network");
1116 bytes = -1;
1117 }
1118 if (ferror(fout))
1119 warn("Writing `%s'", local);
1120 break;
1121 }
1122
1123 progressmeter(1);
1124 if (closefunc != NULL) {
1125 (*closefunc)(fout);
1126 fout = NULL;
1127 }
1128 (void)fclose(din);
1129 din = NULL;
1130 (void)getreply(0);
1131 if (bare_lfs) {
1132 fprintf(ttyout,
1133 "WARNING! %d bare linefeeds received in ASCII mode.\n",
1134 bare_lfs);
1135 fputs("File may not have transferred correctly.\n", ttyout);
1136 }
1137 if (bytes >= 0 && is_retr) {
1138 if (bytes > 0)
1139 ptransfer(0);
1140 if (preserve && (closefunc == fclose)) {
1141 mtime = remotemodtime(remote, 0);
1142 if (mtime != -1) {
1143 (void)gettimeofday(&tval[0], NULL);
1144 tval[1].tv_sec = mtime;
1145 tval[1].tv_usec = 0;
1146 if (utimes(local, tval) == -1) {
1147 fprintf(ttyout,
1148 "Can't change modification time on %s to %s",
1149 local,
1150 rfc2822time(localtime(&mtime)));
1151 }
1152 }
1153 }
1154 }
1155 goto cleanuprecv;
1156
1157 abort:
1158 /*
1159 * abort using RFC0959 recommended IP,SYNC sequence
1160 */
1161 if (! sigsetjmp(xferabort, 1)) {
1162 /* this is the first call */
1163 (void)xsignal(SIGINT, abort_squared);
1164 if (!cpend) {
1165 code = -1;
1166 goto cleanuprecv;
1167 }
1168 abort_remote(din);
1169 }
1170 code = -1;
1171 if (bytes > 0)
1172 ptransfer(0);
1173
1174 cleanuprecv:
1175 if (oldintr)
1176 (void)xsignal(SIGINT, oldintr);
1177 if (oldintp)
1178 (void)xsignal(SIGPIPE, oldintp);
1179 if (data >= 0) {
1180 (void)close(data);
1181 data = -1;
1182 }
1183 if (closefunc != NULL && fout != NULL)
1184 (*closefunc)(fout);
1185 if (din)
1186 (void)fclose(din);
1187 progress = oprogress;
1188 preserve = opreserve;
1189 bytes = 0;
1190 }
1191
1192 /*
1193 * Need to start a listen on the data channel before we send the command,
1194 * otherwise the server's connect may fail.
1195 */
1196 int
1197 initconn(void)
1198 {
1199 char *p, *a;
1200 int result, tmpno = 0;
1201 int on = 1;
1202 int error;
1203 unsigned int addr[16], port[2];
1204 unsigned int af, hal, pal;
1205 socklen_t len;
1206 char *pasvcmd = NULL;
1207 int overbose;
1208
1209 #ifdef INET6
1210 #ifndef NO_DEBUG
1211 if (myctladdr.su_family == AF_INET6 && ftp_debug &&
1212 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
1213 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
1214 warnx("Use of scoped addresses can be troublesome");
1215 }
1216 #endif
1217 #endif
1218
1219 reinit:
1220 if (passivemode) {
1221 data_addr = myctladdr;
1222 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1223 if (data < 0) {
1224 warn("Can't create socket for data connection");
1225 return (1);
1226 }
1227 if ((options & SO_DEBUG) &&
1228 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1229 (void *)&on, sizeof(on)) == -1) {
1230 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1231 }
1232 result = COMPLETE + 1;
1233 switch (data_addr.su_family) {
1234 case AF_INET:
1235 if (epsv4 && !epsv4bad) {
1236 pasvcmd = "EPSV";
1237 overbose = verbose;
1238 if (ftp_debug == 0)
1239 verbose = -1;
1240 result = command("EPSV");
1241 verbose = overbose;
1242 if (verbose > 0 &&
1243 (result == COMPLETE || !connected))
1244 fprintf(ttyout, "%s\n", reply_string);
1245 if (!connected)
1246 return (1);
1247 /*
1248 * this code is to be friendly with broken
1249 * BSDI ftpd
1250 */
1251 if (code / 10 == 22 && code != 229) {
1252 fputs(
1253 "wrong server: return code must be 229\n",
1254 ttyout);
1255 result = COMPLETE + 1;
1256 }
1257 if (result != COMPLETE) {
1258 epsv4bad = 1;
1259 DPRINTF("disabling epsv4 for this "
1260 "connection\n");
1261 }
1262 }
1263 if (result != COMPLETE) {
1264 pasvcmd = "PASV";
1265 result = command("PASV");
1266 if (!connected)
1267 return (1);
1268 }
1269 break;
1270 #ifdef INET6
1271 case AF_INET6:
1272 pasvcmd = "EPSV";
1273 overbose = verbose;
1274 if (ftp_debug == 0)
1275 verbose = -1;
1276 result = command("EPSV");
1277 verbose = overbose;
1278 if (verbose > 0 &&
1279 (result == COMPLETE || !connected))
1280 fprintf(ttyout, "%s\n", reply_string);
1281 if (!connected)
1282 return (1);
1283 /* this code is to be friendly with broken BSDI ftpd */
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 pasvcmd = "LPSV";
1292 result = command("LPSV");
1293 }
1294 if (!connected)
1295 return (1);
1296 break;
1297 #endif
1298 default:
1299 result = COMPLETE + 1;
1300 break;
1301 }
1302 if (result != COMPLETE) {
1303 if (activefallback) {
1304 (void)close(data);
1305 data = -1;
1306 passivemode = 0;
1307 #if 0
1308 activefallback = 0;
1309 #endif
1310 goto reinit;
1311 }
1312 fputs("Passive mode refused.\n", ttyout);
1313 goto bad;
1314 }
1315
1316 #define pack2(var, off) \
1317 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1318 #define pack4(var, off) \
1319 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
1320 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
1321 #define UC(b) (((int)b)&0xff)
1322
1323 /*
1324 * What we've got at this point is a string of comma separated
1325 * one-byte unsigned integer values, separated by commas.
1326 */
1327 if (strcmp(pasvcmd, "PASV") == 0) {
1328 if (data_addr.su_family != AF_INET) {
1329 fputs(
1330 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1331 error = 1;
1332 goto bad;
1333 }
1334 if (code / 10 == 22 && code != 227) {
1335 fputs("wrong server: return code must be 227\n",
1336 ttyout);
1337 error = 1;
1338 goto bad;
1339 }
1340 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
1341 &addr[0], &addr[1], &addr[2], &addr[3],
1342 &port[0], &port[1]);
1343 if (error != 6) {
1344 fputs(
1345 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1346 error = 1;
1347 goto bad;
1348 }
1349 error = 0;
1350 memset(&data_addr, 0, sizeof(data_addr));
1351 data_addr.su_family = AF_INET;
1352 data_addr.su_len = sizeof(struct sockaddr_in);
1353 data_addr.si_su.su_sin.sin_addr.s_addr =
1354 htonl(pack4(addr, 0));
1355 data_addr.su_port = htons(pack2(port, 0));
1356 } else if (strcmp(pasvcmd, "LPSV") == 0) {
1357 if (code / 10 == 22 && code != 228) {
1358 fputs("wrong server: return code must be 228\n",
1359 ttyout);
1360 error = 1;
1361 goto bad;
1362 }
1363 switch (data_addr.su_family) {
1364 case AF_INET:
1365 error = sscanf(pasv,
1366 "%u,%u,%u,%u,%u,%u,%u,%u,%u",
1367 &af, &hal,
1368 &addr[0], &addr[1], &addr[2], &addr[3],
1369 &pal, &port[0], &port[1]);
1370 if (error != 9) {
1371 fputs(
1372 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1373 error = 1;
1374 goto bad;
1375 }
1376 if (af != 4 || hal != 4 || pal != 2) {
1377 fputs(
1378 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1379 error = 1;
1380 goto bad;
1381 }
1382
1383 error = 0;
1384 memset(&data_addr, 0, sizeof(data_addr));
1385 data_addr.su_family = AF_INET;
1386 data_addr.su_len = sizeof(struct sockaddr_in);
1387 data_addr.si_su.su_sin.sin_addr.s_addr =
1388 htonl(pack4(addr, 0));
1389 data_addr.su_port = htons(pack2(port, 0));
1390 break;
1391 #ifdef INET6
1392 case AF_INET6:
1393 error = sscanf(pasv,
1394 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
1395 &af, &hal,
1396 &addr[0], &addr[1], &addr[2], &addr[3],
1397 &addr[4], &addr[5], &addr[6], &addr[7],
1398 &addr[8], &addr[9], &addr[10],
1399 &addr[11], &addr[12], &addr[13],
1400 &addr[14], &addr[15],
1401 &pal, &port[0], &port[1]);
1402 if (error != 21) {
1403 fputs(
1404 "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
1405 error = 1;
1406 goto bad;
1407 }
1408 if (af != 6 || hal != 16 || pal != 2) {
1409 fputs(
1410 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
1411 error = 1;
1412 goto bad;
1413 }
1414
1415 error = 0;
1416 memset(&data_addr, 0, sizeof(data_addr));
1417 data_addr.su_family = AF_INET6;
1418 data_addr.su_len = sizeof(struct sockaddr_in6);
1419 {
1420 int i;
1421 for (i = 0; i < sizeof(struct in6_addr); i++) {
1422 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
1423 UC(addr[i]);
1424 }
1425 }
1426 data_addr.su_port = htons(pack2(port, 0));
1427 break;
1428 #endif
1429 default:
1430 error = 1;
1431 }
1432 } else if (strcmp(pasvcmd, "EPSV") == 0) {
1433 char delim[4];
1434
1435 port[0] = 0;
1436 if (code / 10 == 22 && code != 229) {
1437 fputs("wrong server: return code must be 229\n",
1438 ttyout);
1439 error = 1;
1440 goto bad;
1441 }
1442 if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
1443 &delim[1], &delim[2], &port[1],
1444 &delim[3]) != 5) {
1445 fputs("parse error!\n", ttyout);
1446 error = 1;
1447 goto bad;
1448 }
1449 if (delim[0] != delim[1] || delim[0] != delim[2]
1450 || delim[0] != delim[3]) {
1451 fputs("parse error!\n", ttyout);
1452 error = 1;
1453 goto bad;
1454 }
1455 data_addr = hisctladdr;
1456 data_addr.su_port = htons(port[1]);
1457 } else
1458 goto bad;
1459
1460 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
1461 data_addr.su_len) < 0) {
1462 if (activefallback) {
1463 (void)close(data);
1464 data = -1;
1465 passivemode = 0;
1466 #if 0
1467 activefallback = 0;
1468 #endif
1469 goto reinit;
1470 }
1471 goto bad;
1472 }
1473 #ifdef IPTOS_THROUGHPUT
1474 if (data_addr.su_family == AF_INET) {
1475 on = IPTOS_THROUGHPUT;
1476 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1477 (void *)&on, sizeof(on)) == -1) {
1478 DWARN("setsockopt %s (ignored)",
1479 "IPTOS_THROUGHPUT");
1480 }
1481 }
1482 #endif
1483 return (0);
1484 }
1485
1486 noport:
1487 data_addr = myctladdr;
1488 if (sendport)
1489 data_addr.su_port = 0; /* let system pick one */
1490 if (data != -1)
1491 (void)close(data);
1492 data = socket(data_addr.su_family, SOCK_STREAM, 0);
1493 if (data < 0) {
1494 warn("Can't create socket for data connection");
1495 if (tmpno)
1496 sendport = 1;
1497 return (1);
1498 }
1499 if (!sendport)
1500 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
1501 (void *)&on, sizeof(on)) == -1) {
1502 warn("Can't set SO_REUSEADDR on data connection");
1503 goto bad;
1504 }
1505 if (bind(data, (struct sockaddr *)&data_addr.si_su,
1506 data_addr.su_len) < 0) {
1507 warn("Can't bind for data connection");
1508 goto bad;
1509 }
1510 if ((options & SO_DEBUG) &&
1511 setsockopt(data, SOL_SOCKET, SO_DEBUG,
1512 (void *)&on, sizeof(on)) == -1) {
1513 DWARN("setsockopt %s (ignored)", "SO_DEBUG");
1514 }
1515 len = sizeof(data_addr.si_su);
1516 memset((char *)&data_addr, 0, sizeof (data_addr));
1517 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
1518 warn("Can't determine my address of data connection");
1519 goto bad;
1520 }
1521 data_addr.su_len = len;
1522 if (ftp_listen(data, 1) < 0)
1523 warn("Can't listen to data connection");
1524
1525 if (sendport) {
1526 char hname[NI_MAXHOST], sname[NI_MAXSERV];
1527 int af;
1528 struct sockinet tmp;
1529
1530 switch (data_addr.su_family) {
1531 case AF_INET:
1532 if (!epsv4 || epsv4bad) {
1533 result = COMPLETE + 1;
1534 break;
1535 }
1536 /* FALLTHROUGH */
1537 #ifdef INET6
1538 case AF_INET6:
1539 #endif
1540 af = (data_addr.su_family == AF_INET) ? 1 : 2;
1541 tmp = data_addr;
1542 #ifdef INET6
1543 if (tmp.su_family == AF_INET6)
1544 tmp.si_su.su_sin6.sin6_scope_id = 0;
1545 #endif
1546 if (getnameinfo((struct sockaddr *)&tmp.si_su,
1547 tmp.su_len, hname, sizeof(hname), sname,
1548 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
1549 result = ERROR;
1550 } else {
1551 overbose = verbose;
1552 if (ftp_debug == 0)
1553 verbose = -1;
1554 result = command("EPRT |%d|%s|%s|", af, hname,
1555 sname);
1556 verbose = overbose;
1557 if (verbose > 0 &&
1558 (result == COMPLETE || !connected))
1559 fprintf(ttyout, "%s\n", reply_string);
1560 if (!connected)
1561 return (1);
1562 if (result != COMPLETE) {
1563 epsv4bad = 1;
1564 DPRINTF("disabling epsv4 for this "
1565 "connection\n");
1566 }
1567 }
1568 break;
1569 default:
1570 result = COMPLETE + 1;
1571 break;
1572 }
1573 if (result == COMPLETE)
1574 goto skip_port;
1575
1576 switch (data_addr.su_family) {
1577 case AF_INET:
1578 a = (char *)&data_addr.si_su.su_sin.sin_addr;
1579 p = (char *)&data_addr.su_port;
1580 result = command("PORT %d,%d,%d,%d,%d,%d",
1581 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
1582 UC(p[0]), UC(p[1]));
1583 break;
1584 #ifdef INET6
1585 case AF_INET6:
1586 a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
1587 p = (char *)&data_addr.su_port;
1588 result = command(
1589 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
1590 6, 16,
1591 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
1592 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
1593 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
1594 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
1595 2, UC(p[0]), UC(p[1]));
1596 break;
1597 #endif
1598 default:
1599 result = COMPLETE + 1; /* xxx */
1600 }
1601 if (!connected)
1602 return (1);
1603 skip_port:
1604
1605 if (result == ERROR && sendport == -1) {
1606 sendport = 0;
1607 tmpno = 1;
1608 goto noport;
1609 }
1610 return (result != COMPLETE);
1611 }
1612 if (tmpno)
1613 sendport = 1;
1614 #ifdef IPTOS_THROUGHPUT
1615 if (data_addr.su_family == AF_INET) {
1616 on = IPTOS_THROUGHPUT;
1617 if (setsockopt(data, IPPROTO_IP, IP_TOS,
1618 (void *)&on, sizeof(on)) == -1)
1619 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1620 }
1621 #endif
1622 return (0);
1623 bad:
1624 (void)close(data);
1625 data = -1;
1626 if (tmpno)
1627 sendport = 1;
1628 return (1);
1629 }
1630
1631 FILE *
1632 dataconn(const char *lmode)
1633 {
1634 struct sockinet from;
1635 int s, flags, rv, timeout;
1636 struct timeval endtime, now, td;
1637 struct pollfd pfd[1];
1638 socklen_t fromlen;
1639
1640 if (passivemode) /* passive data connection */
1641 return (fdopen(data, lmode));
1642
1643 /* active mode data connection */
1644
1645 if ((flags = fcntl(data, F_GETFL, 0)) == -1)
1646 goto dataconn_failed; /* get current socket flags */
1647 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
1648 goto dataconn_failed; /* set non-blocking connect */
1649
1650 /* NOTE: we now must restore socket flags on successful exit */
1651
1652 /* limit time waiting on listening socket */
1653 pfd[0].fd = data;
1654 pfd[0].events = POLLIN;
1655 (void)gettimeofday(&endtime, NULL); /* determine end time */
1656 endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
1657 /* without -q, default to 60s */
1658 do {
1659 (void)gettimeofday(&now, NULL);
1660 timersub(&endtime, &now, &td);
1661 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1662 if (timeout < 0)
1663 timeout = 0;
1664 rv = ftp_poll(pfd, 1, timeout);
1665 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */
1666 if (rv == -1) {
1667 warn("Can't poll waiting before accept");
1668 goto dataconn_failed;
1669 }
1670 if (rv == 0) {
1671 warnx("Poll timeout waiting before accept");
1672 goto dataconn_failed;
1673 }
1674
1675 /* (non-blocking) accept the connection */
1676 fromlen = myctladdr.su_len;
1677 do {
1678 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
1679 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */
1680 if (s == -1) {
1681 warn("Can't accept data connection");
1682 goto dataconn_failed;
1683 }
1684
1685 (void)close(data);
1686 data = s;
1687 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */
1688 goto dataconn_failed;
1689
1690 #ifdef IPTOS_THROUGHPUT
1691 if (from.su_family == AF_INET) {
1692 int tos = IPTOS_THROUGHPUT;
1693 if (setsockopt(s, IPPROTO_IP, IP_TOS,
1694 (void *)&tos, sizeof(tos)) == -1) {
1695 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
1696 }
1697 }
1698 #endif
1699 return (fdopen(data, lmode));
1700
1701 dataconn_failed:
1702 (void)close(data);
1703 data = -1;
1704 return (NULL);
1705 }
1706
1707 void
1708 psabort(int notused)
1709 {
1710 int oerrno = errno;
1711
1712 sigint_raised = 1;
1713 alarmtimer(0);
1714 abrtflag++;
1715 errno = oerrno;
1716 }
1717
1718 void
1719 pswitch(int flag)
1720 {
1721 sigfunc oldintr;
1722 static struct comvars {
1723 int connect;
1724 char name[MAXHOSTNAMELEN];
1725 struct sockinet mctl;
1726 struct sockinet hctl;
1727 FILE *in;
1728 FILE *out;
1729 int tpe;
1730 int curtpe;
1731 int cpnd;
1732 int sunqe;
1733 int runqe;
1734 int mcse;
1735 int ntflg;
1736 char nti[17];
1737 char nto[17];
1738 int mapflg;
1739 char mi[MAXPATHLEN];
1740 char mo[MAXPATHLEN];
1741 } proxstruct, tmpstruct;
1742 struct comvars *ip, *op;
1743
1744 abrtflag = 0;
1745 oldintr = xsignal(SIGINT, psabort);
1746 if (flag) {
1747 if (proxy)
1748 return;
1749 ip = &tmpstruct;
1750 op = &proxstruct;
1751 proxy++;
1752 } else {
1753 if (!proxy)
1754 return;
1755 ip = &proxstruct;
1756 op = &tmpstruct;
1757 proxy = 0;
1758 }
1759 ip->connect = connected;
1760 connected = op->connect;
1761 if (hostname)
1762 (void)strlcpy(ip->name, hostname, sizeof(ip->name));
1763 else
1764 ip->name[0] = '\0';
1765 hostname = op->name;
1766 ip->hctl = hisctladdr;
1767 hisctladdr = op->hctl;
1768 ip->mctl = myctladdr;
1769 myctladdr = op->mctl;
1770 ip->in = cin;
1771 cin = op->in;
1772 ip->out = cout;
1773 cout = op->out;
1774 ip->tpe = type;
1775 type = op->tpe;
1776 ip->curtpe = curtype;
1777 curtype = op->curtpe;
1778 ip->cpnd = cpend;
1779 cpend = op->cpnd;
1780 ip->sunqe = sunique;
1781 sunique = op->sunqe;
1782 ip->runqe = runique;
1783 runique = op->runqe;
1784 ip->mcse = mcase;
1785 mcase = op->mcse;
1786 ip->ntflg = ntflag;
1787 ntflag = op->ntflg;
1788 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
1789 (void)strlcpy(ntin, op->nti, sizeof(ntin));
1790 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
1791 (void)strlcpy(ntout, op->nto, sizeof(ntout));
1792 ip->mapflg = mapflag;
1793 mapflag = op->mapflg;
1794 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
1795 (void)strlcpy(mapin, op->mi, sizeof(mapin));
1796 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
1797 (void)strlcpy(mapout, op->mo, sizeof(mapout));
1798 (void)xsignal(SIGINT, oldintr);
1799 if (abrtflag) {
1800 abrtflag = 0;
1801 (*oldintr)(SIGINT);
1802 }
1803 }
1804
1805 void
1806 abortpt(int notused)
1807 {
1808
1809 sigint_raised = 1;
1810 alarmtimer(0);
1811 if (fromatty)
1812 write(fileno(ttyout), "\n", 1);
1813 ptabflg++;
1814 mflag = 0;
1815 abrtflag = 0;
1816 siglongjmp(ptabort, 1);
1817 }
1818
1819 void
1820 proxtrans(const char *cmd, const char *local, const char *remote)
1821 {
1822 sigfunc volatile oldintr;
1823 int prox_type, nfnd;
1824 int volatile secndflag;
1825 char *volatile cmd2;
1826
1827 oldintr = NULL;
1828 secndflag = 0;
1829 if (strcmp(cmd, "RETR"))
1830 cmd2 = "RETR";
1831 else
1832 cmd2 = runique ? "STOU" : "STOR";
1833 if ((prox_type = type) == 0) {
1834 if (unix_server && unix_proxy)
1835 prox_type = TYPE_I;
1836 else
1837 prox_type = TYPE_A;
1838 }
1839 if (curtype != prox_type)
1840 changetype(prox_type, 1);
1841 if (command("PASV") != COMPLETE) {
1842 fputs("proxy server does not support third party transfers.\n",
1843 ttyout);
1844 return;
1845 }
1846 pswitch(0);
1847 if (!connected) {
1848 fputs("No primary connection.\n", ttyout);
1849 pswitch(1);
1850 code = -1;
1851 return;
1852 }
1853 if (curtype != prox_type)
1854 changetype(prox_type, 1);
1855 if (command("PORT %s", pasv) != COMPLETE) {
1856 pswitch(1);
1857 return;
1858 }
1859 if (sigsetjmp(ptabort, 1))
1860 goto abort;
1861 oldintr = xsignal(SIGINT, abortpt);
1862 if ((restart_point &&
1863 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1864 || (command("%s %s", cmd, remote) != PRELIM)) {
1865 (void)xsignal(SIGINT, oldintr);
1866 pswitch(1);
1867 return;
1868 }
1869 sleep(2);
1870 pswitch(1);
1871 secndflag++;
1872 if ((restart_point &&
1873 (command("REST " LLF, (LLT) restart_point) != CONTINUE))
1874 || (command("%s %s", cmd2, local) != PRELIM))
1875 goto abort;
1876 ptflag++;
1877 (void)getreply(0);
1878 pswitch(0);
1879 (void)getreply(0);
1880 (void)xsignal(SIGINT, oldintr);
1881 pswitch(1);
1882 ptflag = 0;
1883 fprintf(ttyout, "local: %s remote: %s\n", local, remote);
1884 return;
1885 abort:
1886 if (sigsetjmp(xferabort, 1)) {
1887 (void)xsignal(SIGINT, oldintr);
1888 return;
1889 }
1890 (void)xsignal(SIGINT, abort_squared);
1891 ptflag = 0;
1892 if (strcmp(cmd, "RETR") && !proxy)
1893 pswitch(1);
1894 else if (!strcmp(cmd, "RETR") && proxy)
1895 pswitch(0);
1896 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */
1897 if (command("%s %s", cmd2, local) != PRELIM) {
1898 pswitch(0);
1899 if (cpend)
1900 abort_remote(NULL);
1901 }
1902 pswitch(1);
1903 if (ptabflg)
1904 code = -1;
1905 (void)xsignal(SIGINT, oldintr);
1906 return;
1907 }
1908 if (cpend)
1909 abort_remote(NULL);
1910 pswitch(!proxy);
1911 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
1912 if (command("%s %s", cmd2, local) != PRELIM) {
1913 pswitch(0);
1914 if (cpend)
1915 abort_remote(NULL);
1916 pswitch(1);
1917 if (ptabflg)
1918 code = -1;
1919 (void)xsignal(SIGINT, oldintr);
1920 return;
1921 }
1922 }
1923 if (cpend)
1924 abort_remote(NULL);
1925 pswitch(!proxy);
1926 if (cpend) {
1927 if ((nfnd = empty(cin, NULL, 10)) <= 0) {
1928 if (nfnd < 0)
1929 warn("Error aborting proxy command");
1930 if (ptabflg)
1931 code = -1;
1932 lostpeer(0);
1933 }
1934 (void)getreply(0);
1935 (void)getreply(0);
1936 }
1937 if (proxy)
1938 pswitch(0);
1939 pswitch(1);
1940 if (ptabflg)
1941 code = -1;
1942 (void)xsignal(SIGINT, oldintr);
1943 }
1944
1945 void
1946 reset(int argc, char *argv[])
1947 {
1948 int nfnd = 1;
1949
1950 if (argc == 0 && argv != NULL) {
1951 UPRINTF("usage: %s\n", argv[0]);
1952 code = -1;
1953 return;
1954 }
1955 while (nfnd > 0) {
1956 if ((nfnd = empty(cin, NULL, 0)) < 0) {
1957 warn("Error resetting connection");
1958 code = -1;
1959 lostpeer(0);
1960 } else if (nfnd)
1961 (void)getreply(0);
1962 }
1963 }
1964
1965 char *
1966 gunique(const char *local)
1967 {
1968 static char new[MAXPATHLEN];
1969 char *cp = strrchr(local, '/');
1970 int d, count=0, len;
1971 char ext = '1';
1972
1973 if (cp)
1974 *cp = '\0';
1975 d = access(cp == local ? "/" : cp ? local : ".", W_OK);
1976 if (cp)
1977 *cp = '/';
1978 if (d < 0) {
1979 warn("Can't access `%s'", local);
1980 return (NULL);
1981 }
1982 len = strlcpy(new, local, sizeof(new));
1983 cp = &new[len];
1984 *cp++ = '.';
1985 while (!d) {
1986 if (++count == 100) {
1987 fputs("runique: can't find unique file name.\n",
1988 ttyout);
1989 return (NULL);
1990 }
1991 *cp++ = ext;
1992 *cp = '\0';
1993 if (ext == '9')
1994 ext = '0';
1995 else
1996 ext++;
1997 if ((d = access(new, F_OK)) < 0)
1998 break;
1999 if (ext != '0')
2000 cp--;
2001 else if (*(cp - 2) == '.')
2002 *(cp - 1) = '1';
2003 else {
2004 *(cp - 2) = *(cp - 2) + 1;
2005 cp--;
2006 }
2007 }
2008 return (new);
2009 }
2010
2011 /*
2012 * abort_squared --
2013 * aborts abort_remote(). lostpeer() is called because if the user is
2014 * too impatient to wait or there's another problem then ftp really
2015 * needs to get back to a known state.
2016 */
2017 void
2018 abort_squared(int dummy)
2019 {
2020 char msgbuf[100];
2021 size_t len;
2022
2023 sigint_raised = 1;
2024 alarmtimer(0);
2025 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
2026 sizeof(msgbuf));
2027 write(fileno(ttyout), msgbuf, len);
2028 lostpeer(0);
2029 siglongjmp(xferabort, 1);
2030 }
2031
2032 void
2033 abort_remote(FILE *din)
2034 {
2035 char buf[BUFSIZ];
2036 int nfnd;
2037
2038 if (cout == NULL) {
2039 warnx("Lost control connection for abort");
2040 if (ptabflg)
2041 code = -1;
2042 lostpeer(0);
2043 return;
2044 }
2045 /*
2046 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
2047 * after urgent byte rather than before as is protocol now
2048 */
2049 buf[0] = IAC;
2050 buf[1] = IP;
2051 buf[2] = IAC;
2052 if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
2053 warn("Can't send abort message");
2054 fprintf(cout, "%cABOR\r\n", DM);
2055 (void)fflush(cout);
2056 if ((nfnd = empty(cin, din, 10)) <= 0) {
2057 if (nfnd < 0)
2058 warn("Can't send abort message");
2059 if (ptabflg)
2060 code = -1;
2061 lostpeer(0);
2062 }
2063 if (din && (nfnd & 2)) {
2064 while (read(fileno(din), buf, BUFSIZ) > 0)
2065 continue;
2066 }
2067 if (getreply(0) == ERROR && code == 552) {
2068 /* 552 needed for nic style abort */
2069 (void)getreply(0);
2070 }
2071 (void)getreply(0);
2072 }
2073
2074 /*
2075 * Ensure that ai->ai_addr is NOT an IPv4 mapped address.
2076 * IPv4 mapped address complicates too many things in FTP
2077 * protocol handling, as FTP protocol is defined differently
2078 * between IPv4 and IPv6.
2079 *
2080 * This may not be the best way to handle this situation,
2081 * since the semantics of IPv4 mapped address is defined in
2082 * the kernel. There are configurations where we should use
2083 * IPv4 mapped address as native IPv6 address, not as
2084 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
2085 *
2086 * More complete solution would be to have an additional
2087 * getsockopt to grab "real" peername/sockname. "real"
2088 * peername/sockname will be AF_INET if IPv4 mapped address
2089 * is used to embed IPv4 address, and will be AF_INET6 if
2090 * we use it as native. What a mess!
2091 */
2092 void
2093 ai_unmapped(struct addrinfo *ai)
2094 {
2095 #ifdef INET6
2096 struct sockaddr_in6 *sin6;
2097 struct sockaddr_in sin;
2098 socklen_t len;
2099
2100 if (ai->ai_family != AF_INET6)
2101 return;
2102 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
2103 sizeof(sin) > ai->ai_addrlen)
2104 return;
2105 sin6 = (struct sockaddr_in6 *)ai->ai_addr;
2106 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
2107 return;
2108
2109 memset(&sin, 0, sizeof(sin));
2110 sin.sin_family = AF_INET;
2111 len = sizeof(struct sockaddr_in);
2112 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
2113 sizeof(sin.sin_addr));
2114 sin.sin_port = sin6->sin6_port;
2115
2116 ai->ai_family = AF_INET;
2117 #if defined(HAVE_STRUCT_SOCKADDR_SA_LEN)
2118 sin.sin_len = len;
2119 #endif
2120 memcpy(ai->ai_addr, &sin, len);
2121 ai->ai_addrlen = len;
2122 #endif
2123 }
2124
2125 #ifdef NO_USAGE
2126 void
2127 xusage(void)
2128 {
2129 fputs("Usage error\n", ttyout);
2130 }
2131 #endif
MP support for (parts of) the network stack