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ftp.c revision 1.142
      1  1.142  christos /*	$NetBSD: ftp.c,v 1.142 2006/10/23 19:53:24 christos Exp $	*/
      2   1.77     lukem 
      3   1.77     lukem /*-
      4  1.127     lukem  * Copyright (c) 1996-2005 The NetBSD Foundation, Inc.
      5   1.77     lukem  * All rights reserved.
      6   1.77     lukem  *
      7   1.77     lukem  * This code is derived from software contributed to The NetBSD Foundation
      8   1.77     lukem  * by Luke Mewburn.
      9   1.77     lukem  *
     10   1.77     lukem  * Redistribution and use in source and binary forms, with or without
     11   1.77     lukem  * modification, are permitted provided that the following conditions
     12   1.77     lukem  * are met:
     13   1.77     lukem  * 1. Redistributions of source code must retain the above copyright
     14   1.77     lukem  *    notice, this list of conditions and the following disclaimer.
     15   1.77     lukem  * 2. Redistributions in binary form must reproduce the above copyright
     16   1.77     lukem  *    notice, this list of conditions and the following disclaimer in the
     17   1.77     lukem  *    documentation and/or other materials provided with the distribution.
     18   1.77     lukem  * 3. All advertising materials mentioning features or use of this software
     19   1.77     lukem  *    must display the following acknowledgement:
     20   1.77     lukem  *	This product includes software developed by the NetBSD
     21   1.77     lukem  *	Foundation, Inc. and its contributors.
     22   1.77     lukem  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23   1.77     lukem  *    contributors may be used to endorse or promote products derived
     24   1.77     lukem  *    from this software without specific prior written permission.
     25   1.77     lukem  *
     26   1.77     lukem  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27   1.77     lukem  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28   1.77     lukem  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29   1.77     lukem  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30   1.77     lukem  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31   1.77     lukem  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32   1.77     lukem  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33   1.77     lukem  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34   1.77     lukem  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35   1.77     lukem  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36   1.77     lukem  * POSSIBILITY OF SUCH DAMAGE.
     37   1.77     lukem  */
     38   1.48    itojun 
     39   1.48    itojun /*
     40   1.72     lukem  * Copyright (c) 1985, 1989, 1993, 1994
     41   1.72     lukem  *	The Regents of the University of California.  All rights reserved.
     42   1.72     lukem  *
     43   1.48    itojun  * Redistribution and use in source and binary forms, with or without
     44   1.48    itojun  * modification, are permitted provided that the following conditions
     45   1.48    itojun  * are met:
     46   1.48    itojun  * 1. Redistributions of source code must retain the above copyright
     47   1.48    itojun  *    notice, this list of conditions and the following disclaimer.
     48   1.48    itojun  * 2. Redistributions in binary form must reproduce the above copyright
     49   1.48    itojun  *    notice, this list of conditions and the following disclaimer in the
     50   1.48    itojun  *    documentation and/or other materials provided with the distribution.
     51  1.122       agc  * 3. Neither the name of the University nor the names of its contributors
     52   1.48    itojun  *    may be used to endorse or promote products derived from this software
     53   1.48    itojun  *    without specific prior written permission.
     54   1.72     lukem  *
     55   1.72     lukem  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     56   1.48    itojun  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     57   1.48    itojun  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     58   1.72     lukem  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     59   1.48    itojun  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     60   1.48    itojun  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     61   1.48    itojun  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     62   1.48    itojun  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     63   1.48    itojun  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     64   1.48    itojun  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     65   1.48    itojun  * SUCH DAMAGE.
     66   1.48    itojun  */
     67   1.12       tls 
     68    1.1       cgd /*
     69   1.72     lukem  * Copyright (C) 1997 and 1998 WIDE Project.
     70   1.72     lukem  * All rights reserved.
     71  1.128     lukem  *
     72    1.1       cgd  * Redistribution and use in source and binary forms, with or without
     73    1.1       cgd  * modification, are permitted provided that the following conditions
     74    1.1       cgd  * are met:
     75    1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     76    1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     77    1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     78    1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     79    1.1       cgd  *    documentation and/or other materials provided with the distribution.
     80   1.72     lukem  * 3. Neither the name of the project nor the names of its contributors
     81    1.1       cgd  *    may be used to endorse or promote products derived from this software
     82    1.1       cgd  *    without specific prior written permission.
     83  1.128     lukem  *
     84   1.72     lukem  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
     85    1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     86    1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     87   1.72     lukem  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
     88    1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     89    1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     90    1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     91    1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     92    1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     93    1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     94    1.1       cgd  * SUCH DAMAGE.
     95    1.1       cgd  */
     96    1.1       cgd 
     97   1.26     lukem #include <sys/cdefs.h>
     98    1.1       cgd #ifndef lint
     99   1.12       tls #if 0
    100   1.12       tls static char sccsid[] = "@(#)ftp.c	8.6 (Berkeley) 10/27/94";
    101   1.12       tls #else
    102  1.142  christos __RCSID("$NetBSD: ftp.c,v 1.142 2006/10/23 19:53:24 christos Exp $");
    103   1.12       tls #endif
    104    1.1       cgd #endif /* not lint */
    105    1.1       cgd 
    106   1.21     lukem #include <sys/types.h>
    107    1.1       cgd #include <sys/stat.h>
    108    1.1       cgd #include <sys/socket.h>
    109   1.33  christos #include <sys/time.h>
    110    1.1       cgd 
    111    1.1       cgd #include <netinet/in.h>
    112    1.1       cgd #include <netinet/in_systm.h>
    113    1.1       cgd #include <netinet/ip.h>
    114    1.6       cgd #include <arpa/inet.h>
    115    1.1       cgd #include <arpa/ftp.h>
    116    1.1       cgd #include <arpa/telnet.h>
    117    1.1       cgd 
    118    1.6       cgd #include <ctype.h>
    119    1.6       cgd #include <err.h>
    120    1.1       cgd #include <errno.h>
    121  1.127     lukem #include <fcntl.h>
    122    1.1       cgd #include <netdb.h>
    123    1.6       cgd #include <stdio.h>
    124    1.6       cgd #include <stdlib.h>
    125    1.6       cgd #include <string.h>
    126   1.32    kleink #include <time.h>
    127    1.6       cgd #include <unistd.h>
    128   1.23     lukem #include <stdarg.h>
    129    1.1       cgd 
    130    1.1       cgd #include "ftp_var.h"
    131   1.48    itojun 
    132  1.126     lukem volatile sig_atomic_t	abrtflag;
    133  1.126     lukem volatile sig_atomic_t	timeoutflag;
    134  1.126     lukem 
    135   1.83     lukem sigjmp_buf	ptabort;
    136    1.6       cgd int	ptabflg;
    137    1.1       cgd int	ptflag = 0;
    138   1.73     lukem char	pasv[BUFSIZ];	/* passive port for proxy data connection */
    139    1.1       cgd 
    140   1.95     lukem static int empty(FILE *, FILE *, int);
    141   1.45  christos 
    142  1.104     lukem struct sockinet {
    143  1.104     lukem 	union sockunion {
    144  1.104     lukem 		struct sockaddr_in  su_sin;
    145   1.62     lukem #ifdef INET6
    146  1.104     lukem 		struct sockaddr_in6 su_sin6;
    147   1.62     lukem #endif
    148  1.104     lukem 	} si_su;
    149  1.107     lukem #if !HAVE_SOCKADDR_SA_LEN
    150  1.104     lukem 	int	si_len;
    151   1.62     lukem #endif
    152   1.48    itojun };
    153   1.52  christos 
    154  1.107     lukem #if !HAVE_SOCKADDR_SA_LEN
    155  1.104     lukem # define su_len		si_len
    156  1.104     lukem #else
    157  1.104     lukem # define su_len		si_su.su_sin.sin_len
    158  1.104     lukem #endif
    159  1.104     lukem #define su_family	si_su.su_sin.sin_family
    160  1.104     lukem #define su_port		si_su.su_sin.sin_port
    161   1.48    itojun 
    162  1.104     lukem struct sockinet myctladdr, hisctladdr, data_addr;
    163    1.1       cgd 
    164    1.1       cgd char *
    165   1.95     lukem hookup(char *host, char *port)
    166    1.1       cgd {
    167  1.132     lukem 	int s = -1, error, portnum;
    168   1.49    itojun 	struct addrinfo hints, *res, *res0;
    169   1.58  christos 	char hbuf[MAXHOSTNAMELEN];
    170   1.14     lukem 	static char hostnamebuf[MAXHOSTNAMELEN];
    171   1.49    itojun 	char *cause = "unknown";
    172  1.132     lukem 	socklen_t len;
    173  1.130     lukem 	int on = 1;
    174  1.108     lukem 
    175   1.48    itojun 	memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
    176  1.106     lukem 	memset((char *)&myctladdr, 0, sizeof (myctladdr));
    177   1.48    itojun 	memset(&hints, 0, sizeof(hints));
    178  1.108     lukem 	portnum = parseport(port, FTP_PORT);
    179   1.48    itojun 	hints.ai_flags = AI_CANONNAME;
    180  1.116     lukem 	hints.ai_family = family;
    181   1.48    itojun 	hints.ai_socktype = SOCK_STREAM;
    182   1.48    itojun 	hints.ai_protocol = 0;
    183  1.108     lukem 	error = getaddrinfo(host, NULL, &hints, &res0);
    184   1.48    itojun 	if (error) {
    185  1.134     lukem 		warnx("%s: %s", host, gai_strerror(error));
    186   1.48    itojun 		code = -1;
    187   1.48    itojun 		return (0);
    188   1.48    itojun 	}
    189    1.1       cgd 
    190   1.49    itojun 	if (res0->ai_canonname)
    191   1.68     lukem 		(void)strlcpy(hostnamebuf, res0->ai_canonname,
    192   1.68     lukem 		    sizeof(hostnamebuf));
    193   1.48    itojun 	else
    194   1.68     lukem 		(void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
    195    1.1       cgd 	hostname = hostnamebuf;
    196  1.128     lukem 
    197   1.49    itojun 	for (res = res0; res; res = res->ai_next) {
    198   1.96    itojun 		/*
    199   1.96    itojun 		 * make sure that ai_addr is NOT an IPv4 mapped address.
    200   1.96    itojun 		 * IPv4 mapped address complicates too many things in FTP
    201   1.96    itojun 		 * protocol handling, as FTP protocol is defined differently
    202   1.96    itojun 		 * between IPv4 and IPv6.
    203   1.97    itojun 		 *
    204   1.97    itojun 		 * This may not be the best way to handle this situation,
    205   1.97    itojun 		 * since the semantics of IPv4 mapped address is defined in
    206   1.97    itojun 		 * the kernel.  There are configurations where we should use
    207   1.97    itojun 		 * IPv4 mapped address as native IPv6 address, not as
    208   1.97    itojun 		 * "an IPv6 address that embeds IPv4 address" (namely, SIIT).
    209   1.97    itojun 		 *
    210   1.97    itojun 		 * More complete solution would be to have an additional
    211   1.97    itojun 		 * getsockopt to grab "real" peername/sockname.  "real"
    212   1.97    itojun 		 * peername/sockname will be AF_INET if IPv4 mapped address
    213   1.97    itojun 		 * is used to embed IPv4 address, and will be AF_INET6 if
    214   1.97    itojun 		 * we use it as native.  What a mess!
    215   1.96    itojun 		 */
    216   1.96    itojun 		ai_unmapped(res);
    217  1.133     lukem 		if (verbose && res0->ai_next) {
    218  1.133     lukem 				/* if we have multiple possibilities */
    219  1.112    itojun 			if (getnameinfo(res->ai_addr, res->ai_addrlen,
    220  1.112    itojun 			    hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST))
    221  1.112    itojun 				strlcpy(hbuf, "?", sizeof(hbuf));
    222   1.49    itojun 			fprintf(ttyout, "Trying %s...\n", hbuf);
    223   1.49    itojun 		}
    224  1.108     lukem 		((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum);
    225  1.109     lukem 		s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol);
    226   1.49    itojun 		if (s < 0) {
    227   1.49    itojun 			cause = "socket";
    228   1.49    itojun 			continue;
    229   1.49    itojun 		}
    230  1.136  christos 		error = ftp_connect(s, res->ai_addr, res->ai_addrlen);
    231   1.49    itojun 		if (error) {
    232   1.49    itojun 			/* this "if" clause is to prevent print warning twice */
    233   1.49    itojun 			if (res->ai_next) {
    234  1.112    itojun 				if (getnameinfo(res->ai_addr, res->ai_addrlen,
    235  1.106     lukem 				    hbuf, sizeof(hbuf), NULL, 0,
    236  1.112    itojun 				    NI_NUMERICHOST))
    237  1.112    itojun 					strlcpy(hbuf, "?", sizeof(hbuf));
    238   1.49    itojun 				warn("connect to address %s", hbuf);
    239    1.1       cgd 			}
    240   1.49    itojun 			cause = "connect";
    241   1.49    itojun 			close(s);
    242   1.49    itojun 			s = -1;
    243    1.1       cgd 			continue;
    244    1.1       cgd 		}
    245   1.49    itojun 
    246   1.49    itojun 		/* finally we got one */
    247   1.49    itojun 		break;
    248   1.49    itojun 	}
    249   1.49    itojun 	if (s < 0) {
    250  1.101    itojun 		warn("%s", cause);
    251    1.1       cgd 		code = -1;
    252   1.50    itojun 		freeaddrinfo(res0);
    253   1.49    itojun 		return 0;
    254    1.1       cgd 	}
    255  1.104     lukem 	memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen);
    256  1.104     lukem 	hisctladdr.su_len = res->ai_addrlen;
    257   1.49    itojun 	freeaddrinfo(res0);
    258   1.49    itojun 	res0 = res = NULL;
    259   1.58  christos 
    260  1.105     lukem 	len = hisctladdr.su_len;
    261  1.132     lukem 	if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) {
    262    1.6       cgd 		warn("getsockname");
    263    1.1       cgd 		code = -1;
    264    1.1       cgd 		goto bad;
    265    1.1       cgd 	}
    266  1.105     lukem 	myctladdr.su_len = len;
    267   1.58  christos 
    268   1.92     lukem #ifdef IPTOS_LOWDELAY
    269  1.104     lukem 	if (hisctladdr.su_family == AF_INET) {
    270   1.53  christos 		int tos = IPTOS_LOWDELAY;
    271  1.130     lukem 		if (setsockopt(s, IPPROTO_IP, IP_TOS,
    272  1.131     lukem 				(void *)&tos, sizeof(tos)) == -1) {
    273  1.135  christos 				DWARN("setsockopt %s (ignored)",
    274  1.130     lukem 				    "IPTOS_LOWDELAY");
    275  1.130     lukem 		}
    276   1.48    itojun 	}
    277   1.92     lukem #endif
    278    1.1       cgd 	cin = fdopen(s, "r");
    279    1.1       cgd 	cout = fdopen(s, "w");
    280    1.1       cgd 	if (cin == NULL || cout == NULL) {
    281    1.6       cgd 		warnx("fdopen failed.");
    282    1.1       cgd 		if (cin)
    283   1.23     lukem 			(void)fclose(cin);
    284    1.1       cgd 		if (cout)
    285   1.23     lukem 			(void)fclose(cout);
    286    1.1       cgd 		code = -1;
    287    1.1       cgd 		goto bad;
    288    1.1       cgd 	}
    289    1.1       cgd 	if (verbose)
    290   1.35     lukem 		fprintf(ttyout, "Connected to %s.\n", hostname);
    291   1.87     lukem 	if (getreply(0) > 2) {	/* read startup message from server */
    292    1.1       cgd 		if (cin)
    293   1.23     lukem 			(void)fclose(cin);
    294    1.1       cgd 		if (cout)
    295   1.23     lukem 			(void)fclose(cout);
    296    1.1       cgd 		code = -1;
    297    1.1       cgd 		goto bad;
    298    1.1       cgd 	}
    299    1.1       cgd 
    300  1.130     lukem 	if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE,
    301  1.130     lukem 			(void *)&on, sizeof(on)) == -1) {
    302  1.135  christos 		DWARN("setsockopt %s (ignored)", "SO_OOBINLINE");
    303    1.1       cgd 	}
    304    1.1       cgd 
    305    1.1       cgd 	return (hostname);
    306  1.102     lukem  bad:
    307   1.23     lukem 	(void)close(s);
    308   1.31     lukem 	return (NULL);
    309    1.1       cgd }
    310    1.1       cgd 
    311    1.1       cgd void
    312   1.95     lukem cmdabort(int notused)
    313    1.1       cgd {
    314   1.81     lukem 	int oerrno = errno;
    315    1.1       cgd 
    316  1.126     lukem 	sigint_raised = 1;
    317   1.22     lukem 	alarmtimer(0);
    318   1.84     lukem 	if (fromatty)
    319   1.84     lukem 		write(fileno(ttyout), "\n", 1);
    320    1.1       cgd 	abrtflag++;
    321    1.1       cgd 	if (ptflag)
    322   1.81     lukem 		siglongjmp(ptabort, 1);
    323   1.81     lukem 	errno = oerrno;
    324    1.1       cgd }
    325    1.1       cgd 
    326   1.76     lukem void
    327   1.95     lukem cmdtimeout(int notused)
    328   1.76     lukem {
    329   1.81     lukem 	int oerrno = errno;
    330   1.76     lukem 
    331   1.76     lukem 	alarmtimer(0);
    332   1.84     lukem 	if (fromatty)
    333   1.84     lukem 		write(fileno(ttyout), "\n", 1);
    334   1.76     lukem 	timeoutflag++;
    335   1.76     lukem 	if (ptflag)
    336   1.81     lukem 		siglongjmp(ptabort, 1);
    337   1.81     lukem 	errno = oerrno;
    338   1.76     lukem }
    339   1.76     lukem 
    340    1.1       cgd /*VARARGS*/
    341    1.6       cgd int
    342   1.23     lukem command(const char *fmt, ...)
    343    1.1       cgd {
    344    1.1       cgd 	va_list ap;
    345    1.1       cgd 	int r;
    346   1.90     lukem 	sigfunc oldsigint;
    347    1.1       cgd 
    348  1.135  christos #ifndef NO_DEBUG
    349  1.137  christos 	if (ftp_debug) {
    350   1.35     lukem 		fputs("---> ", ttyout);
    351   1.23     lukem 		va_start(ap, fmt);
    352    1.1       cgd 		if (strncmp("PASS ", fmt, 5) == 0)
    353   1.35     lukem 			fputs("PASS XXXX", ttyout);
    354   1.14     lukem 		else if (strncmp("ACCT ", fmt, 5) == 0)
    355   1.35     lukem 			fputs("ACCT XXXX", ttyout);
    356   1.14     lukem 		else
    357   1.35     lukem 			vfprintf(ttyout, fmt, ap);
    358    1.1       cgd 		va_end(ap);
    359   1.35     lukem 		putc('\n', ttyout);
    360    1.1       cgd 	}
    361  1.135  christos #endif
    362    1.1       cgd 	if (cout == NULL) {
    363   1.23     lukem 		warnx("No control connection for command.");
    364    1.1       cgd 		code = -1;
    365    1.1       cgd 		return (0);
    366    1.1       cgd 	}
    367   1.76     lukem 
    368   1.76     lukem 	abrtflag = 0;
    369   1.76     lukem 
    370   1.76     lukem 	oldsigint = xsignal(SIGINT, cmdabort);
    371   1.76     lukem 
    372   1.23     lukem 	va_start(ap, fmt);
    373    1.1       cgd 	vfprintf(cout, fmt, ap);
    374    1.1       cgd 	va_end(ap);
    375   1.23     lukem 	fputs("\r\n", cout);
    376   1.23     lukem 	(void)fflush(cout);
    377    1.1       cgd 	cpend = 1;
    378    1.1       cgd 	r = getreply(!strcmp(fmt, "QUIT"));
    379   1.76     lukem 	if (abrtflag && oldsigint != SIG_IGN)
    380   1.76     lukem 		(*oldsigint)(SIGINT);
    381   1.76     lukem 	(void)xsignal(SIGINT, oldsigint);
    382    1.6       cgd 	return (r);
    383    1.1       cgd }
    384    1.1       cgd 
    385  1.142  christos static const char *m421[] = {
    386  1.142  christos 	"remote server timed out. Connection closed",
    387  1.142  christos 	"user interrupt. Connection closed",
    388  1.142  christos 	"remote server has closed connection",
    389  1.142  christos };
    390  1.142  christos 
    391    1.6       cgd int
    392   1.95     lukem getreply(int expecteof)
    393    1.1       cgd {
    394   1.16     lukem 	char current_line[BUFSIZ];	/* last line of previous reply */
    395   1.16     lukem 	int c, n, line;
    396    1.6       cgd 	int dig;
    397    1.1       cgd 	int originalcode = 0, continuation = 0;
    398   1.90     lukem 	sigfunc oldsigint, oldsigalrm;
    399    1.1       cgd 	int pflag = 0;
    400    1.6       cgd 	char *cp, *pt = pasv;
    401    1.1       cgd 
    402   1.76     lukem 	abrtflag = 0;
    403   1.76     lukem 	timeoutflag = 0;
    404   1.76     lukem 
    405   1.76     lukem 	oldsigint = xsignal(SIGINT, cmdabort);
    406   1.76     lukem 	oldsigalrm = xsignal(SIGALRM, cmdtimeout);
    407   1.76     lukem 
    408   1.16     lukem 	for (line = 0 ;; line++) {
    409    1.1       cgd 		dig = n = code = 0;
    410   1.16     lukem 		cp = current_line;
    411  1.141      elad 		while (alarmtimer(quit_time ? quit_time : 60),
    412  1.141      elad 		       ((c = getc(cin)) != '\n')) {
    413    1.1       cgd 			if (c == IAC) {     /* handle telnet commands */
    414    1.1       cgd 				switch (c = getc(cin)) {
    415    1.1       cgd 				case WILL:
    416    1.1       cgd 				case WONT:
    417    1.1       cgd 					c = getc(cin);
    418    1.1       cgd 					fprintf(cout, "%c%c%c", IAC, DONT, c);
    419   1.23     lukem 					(void)fflush(cout);
    420    1.1       cgd 					break;
    421    1.1       cgd 				case DO:
    422    1.1       cgd 				case DONT:
    423    1.1       cgd 					c = getc(cin);
    424    1.1       cgd 					fprintf(cout, "%c%c%c", IAC, WONT, c);
    425   1.23     lukem 					(void)fflush(cout);
    426    1.1       cgd 					break;
    427    1.1       cgd 				default:
    428    1.1       cgd 					break;
    429    1.1       cgd 				}
    430    1.1       cgd 				continue;
    431    1.1       cgd 			}
    432    1.1       cgd 			dig++;
    433    1.1       cgd 			if (c == EOF) {
    434   1.76     lukem 				/*
    435   1.76     lukem 				 * these will get trashed by pswitch()
    436   1.76     lukem 				 * in lostpeer()
    437   1.76     lukem 				 */
    438   1.76     lukem 				int reply_timeoutflag = timeoutflag;
    439   1.76     lukem 				int reply_abrtflag = abrtflag;
    440   1.76     lukem 
    441   1.85     lukem 				alarmtimer(0);
    442   1.85     lukem 				if (expecteof && feof(cin)) {
    443   1.76     lukem 					(void)xsignal(SIGINT, oldsigint);
    444   1.76     lukem 					(void)xsignal(SIGALRM, oldsigalrm);
    445    1.1       cgd 					code = 221;
    446    1.1       cgd 					return (0);
    447    1.1       cgd 				}
    448   1.85     lukem 				cpend = 0;
    449   1.85     lukem 				lostpeer(0);
    450    1.1       cgd 				if (verbose) {
    451  1.142  christos 					size_t midx;
    452   1.76     lukem 					if (reply_timeoutflag)
    453  1.142  christos 						midx = 0;
    454   1.76     lukem 					else if (reply_abrtflag)
    455  1.142  christos 						midx = 1;
    456   1.76     lukem 					else
    457  1.142  christos 						midx = 2;
    458  1.142  christos    					(void)fprintf(ttyout,
    459  1.142  christos 			    "421 Service not available, %s.\n", m421[midx]);
    460   1.76     lukem 					(void)fflush(ttyout);
    461    1.1       cgd 				}
    462    1.1       cgd 				code = 421;
    463   1.76     lukem 				(void)xsignal(SIGINT, oldsigint);
    464   1.76     lukem 				(void)xsignal(SIGALRM, oldsigalrm);
    465    1.6       cgd 				return (4);
    466    1.1       cgd 			}
    467    1.1       cgd 			if (c != '\r' && (verbose > 0 ||
    468   1.35     lukem 			    ((verbose > -1 && n == '5' && dig > 4) &&
    469   1.35     lukem 			    (((!n && c < '5') || (n && n < '5'))
    470   1.35     lukem 			     || !retry_connect)))) {
    471    1.1       cgd 				if (proxflag &&
    472   1.16     lukem 				   (dig == 1 || (dig == 5 && verbose == 0)))
    473   1.35     lukem 					fprintf(ttyout, "%s:", hostname);
    474   1.35     lukem 				(void)putc(c, ttyout);
    475    1.1       cgd 			}
    476    1.1       cgd 			if (dig < 4 && isdigit(c))
    477    1.1       cgd 				code = code * 10 + (c - '0');
    478   1.48    itojun 			if (!pflag && (code == 227 || code == 228))
    479    1.1       cgd 				pflag = 1;
    480   1.48    itojun 			else if (!pflag && code == 229)
    481   1.48    itojun 				pflag = 100;
    482    1.1       cgd 			if (dig > 4 && pflag == 1 && isdigit(c))
    483    1.1       cgd 				pflag = 2;
    484    1.1       cgd 			if (pflag == 2) {
    485  1.118    itojun 				if (c != '\r' && c != ')') {
    486  1.118    itojun 					if (pt < &pasv[sizeof(pasv) - 1])
    487  1.118    itojun 						*pt++ = c;
    488  1.118    itojun 				} else {
    489    1.1       cgd 					*pt = '\0';
    490    1.1       cgd 					pflag = 3;
    491    1.1       cgd 				}
    492    1.1       cgd 			}
    493   1.48    itojun 			if (pflag == 100 && c == '(')
    494   1.48    itojun 				pflag = 2;
    495    1.1       cgd 			if (dig == 4 && c == '-') {
    496    1.1       cgd 				if (continuation)
    497    1.1       cgd 					code = 0;
    498    1.1       cgd 				continuation++;
    499    1.1       cgd 			}
    500    1.1       cgd 			if (n == 0)
    501    1.1       cgd 				n = c;
    502   1.16     lukem 			if (cp < &current_line[sizeof(current_line) - 1])
    503    1.1       cgd 				*cp++ = c;
    504    1.1       cgd 		}
    505   1.35     lukem 		if (verbose > 0 || ((verbose > -1 && n == '5') &&
    506   1.35     lukem 		    (n < '5' || !retry_connect))) {
    507   1.35     lukem 			(void)putc(c, ttyout);
    508   1.35     lukem 			(void)fflush (ttyout);
    509    1.1       cgd 		}
    510  1.102     lukem 		if (cp[-1] == '\r')
    511  1.102     lukem 			cp[-1] = '\0';
    512  1.102     lukem 		*cp = '\0';
    513  1.102     lukem 		if (line == 0)
    514  1.102     lukem 			(void)strlcpy(reply_string, current_line,
    515  1.102     lukem 			    sizeof(reply_string));
    516  1.102     lukem 		if (line > 0 && code == 0 && reply_callback != NULL)
    517  1.102     lukem 			(*reply_callback)(current_line);
    518    1.1       cgd 		if (continuation && code != originalcode) {
    519    1.1       cgd 			if (originalcode == 0)
    520    1.1       cgd 				originalcode = code;
    521    1.1       cgd 			continue;
    522    1.1       cgd 		}
    523    1.1       cgd 		if (n != '1')
    524    1.1       cgd 			cpend = 0;
    525   1.85     lukem 		alarmtimer(0);
    526   1.76     lukem 		(void)xsignal(SIGINT, oldsigint);
    527   1.76     lukem 		(void)xsignal(SIGALRM, oldsigalrm);
    528    1.1       cgd 		if (code == 421 || originalcode == 421)
    529   1.85     lukem 			lostpeer(0);
    530   1.76     lukem 		if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN)
    531   1.76     lukem 			(*oldsigint)(SIGINT);
    532   1.76     lukem 		if (timeoutflag && oldsigalrm != cmdtimeout &&
    533   1.76     lukem 		    oldsigalrm != SIG_IGN)
    534   1.76     lukem 			(*oldsigalrm)(SIGINT);
    535    1.1       cgd 		return (n - '0');
    536    1.1       cgd 	}
    537    1.1       cgd }
    538    1.1       cgd 
    539   1.45  christos static int
    540   1.95     lukem empty(FILE *cin, FILE *din, int sec)
    541    1.1       cgd {
    542  1.127     lukem 	int		nr, nfd;
    543  1.127     lukem 	struct pollfd	pfd[2];
    544   1.45  christos 
    545  1.127     lukem 	nfd = 0;
    546   1.45  christos 	if (cin) {
    547  1.124     lukem 		pfd[nfd].fd = fileno(cin);
    548  1.124     lukem 		pfd[nfd++].events = POLLIN;
    549   1.45  christos 	}
    550   1.45  christos 
    551   1.45  christos 	if (din) {
    552  1.124     lukem 		pfd[nfd].fd = fileno(din);
    553  1.124     lukem 		pfd[nfd++].events = POLLIN;
    554   1.45  christos 	}
    555   1.45  christos 
    556  1.136  christos 	if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0)
    557   1.45  christos 		return nr;
    558   1.45  christos 
    559   1.45  christos 	nr = 0;
    560   1.45  christos 	nfd = 0;
    561   1.45  christos 	if (cin)
    562   1.45  christos 		nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0;
    563   1.45  christos 	if (din)
    564   1.45  christos 		nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0;
    565   1.45  christos 	return nr;
    566    1.1       cgd }
    567    1.1       cgd 
    568   1.83     lukem sigjmp_buf	xferabort;
    569    1.1       cgd 
    570    1.1       cgd void
    571   1.95     lukem abortxfer(int notused)
    572    1.1       cgd {
    573   1.81     lukem 	char msgbuf[100];
    574  1.132     lukem 	size_t len;
    575    1.1       cgd 
    576  1.126     lukem 	sigint_raised = 1;
    577   1.22     lukem 	alarmtimer(0);
    578    1.1       cgd 	mflag = 0;
    579    1.1       cgd 	abrtflag = 0;
    580   1.81     lukem 	switch (direction[0]) {
    581   1.81     lukem 	case 'r':
    582   1.81     lukem 		strlcpy(msgbuf, "\nreceive", sizeof(msgbuf));
    583   1.81     lukem 		break;
    584   1.81     lukem 	case 's':
    585   1.81     lukem 		strlcpy(msgbuf, "\nsend", sizeof(msgbuf));
    586   1.81     lukem 		break;
    587   1.81     lukem 	default:
    588   1.85     lukem 		errx(1, "abortxfer called with unknown direction `%s'",
    589   1.81     lukem 		    direction);
    590   1.81     lukem 	}
    591   1.85     lukem 	len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n",
    592   1.81     lukem 	    sizeof(msgbuf));
    593   1.81     lukem 	write(fileno(ttyout), msgbuf, len);
    594   1.81     lukem 	siglongjmp(xferabort, 1);
    595    1.1       cgd }
    596    1.1       cgd 
    597    1.6       cgd void
    598   1.95     lukem sendrequest(const char *cmd, const char *local, const char *remote,
    599   1.95     lukem 	    int printnames)
    600    1.1       cgd {
    601    1.1       cgd 	struct stat st;
    602    1.6       cgd 	int c, d;
    603   1.26     lukem 	FILE *fin, *dout;
    604   1.95     lukem 	int (*closefunc)(FILE *);
    605   1.90     lukem 	sigfunc oldintr, oldintp;
    606   1.26     lukem 	volatile off_t hashbytes;
    607   1.64     lukem 	char *lmode, *bufp;
    608   1.64     lukem 	static size_t bufsize;
    609   1.64     lukem 	static char *buf;
    610   1.23     lukem 	int oprogress;
    611    1.1       cgd 
    612   1.35     lukem #ifdef __GNUC__			/* to shut up gcc warnings */
    613   1.26     lukem 	(void)&fin;
    614   1.26     lukem 	(void)&dout;
    615   1.26     lukem 	(void)&closefunc;
    616   1.26     lukem 	(void)&oldintr;
    617   1.26     lukem 	(void)&oldintp;
    618   1.26     lukem 	(void)&lmode;
    619  1.140       mrg 	fin = NULL;	/* XXX gcc4 */
    620   1.26     lukem #endif
    621   1.26     lukem 
    622   1.16     lukem 	hashbytes = mark;
    623   1.14     lukem 	direction = "sent";
    624   1.26     lukem 	dout = NULL;
    625   1.14     lukem 	bytes = 0;
    626   1.16     lukem 	filesize = -1;
    627   1.23     lukem 	oprogress = progress;
    628    1.1       cgd 	if (verbose && printnames) {
    629  1.138  christos 		if (*local != '-')
    630   1.35     lukem 			fprintf(ttyout, "local: %s ", local);
    631    1.1       cgd 		if (remote)
    632   1.35     lukem 			fprintf(ttyout, "remote: %s\n", remote);
    633    1.1       cgd 	}
    634    1.1       cgd 	if (proxy) {
    635    1.1       cgd 		proxtrans(cmd, local, remote);
    636    1.1       cgd 		return;
    637    1.1       cgd 	}
    638    1.1       cgd 	if (curtype != type)
    639    1.1       cgd 		changetype(type, 0);
    640    1.1       cgd 	closefunc = NULL;
    641    1.1       cgd 	oldintr = NULL;
    642    1.1       cgd 	oldintp = NULL;
    643    1.1       cgd 	lmode = "w";
    644   1.81     lukem 	if (sigsetjmp(xferabort, 1)) {
    645   1.85     lukem 		while (cpend)
    646   1.23     lukem 			(void)getreply(0);
    647   1.79     lukem 		code = -1;
    648   1.30     lukem 		goto cleanupsend;
    649    1.1       cgd 	}
    650   1.80     lukem 	(void)xsignal(SIGQUIT, psummary);
    651   1.81     lukem 	oldintr = xsignal(SIGINT, abortxfer);
    652   1.23     lukem 	if (strcmp(local, "-") == 0) {
    653    1.1       cgd 		fin = stdin;
    654   1.23     lukem 		progress = 0;
    655   1.23     lukem 	} else if (*local == '|') {
    656   1.67     lukem 		oldintp = xsignal(SIGPIPE, SIG_IGN);
    657    1.1       cgd 		fin = popen(local + 1, "r");
    658    1.1       cgd 		if (fin == NULL) {
    659    1.6       cgd 			warn("%s", local + 1);
    660   1.79     lukem 			code = -1;
    661   1.30     lukem 			goto cleanupsend;
    662    1.1       cgd 		}
    663   1.23     lukem 		progress = 0;
    664    1.1       cgd 		closefunc = pclose;
    665    1.1       cgd 	} else {
    666    1.1       cgd 		fin = fopen(local, "r");
    667    1.1       cgd 		if (fin == NULL) {
    668    1.6       cgd 			warn("local: %s", local);
    669   1.79     lukem 			code = -1;
    670   1.30     lukem 			goto cleanupsend;
    671    1.1       cgd 		}
    672    1.1       cgd 		closefunc = fclose;
    673   1.29   mycroft 		if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) {
    674   1.35     lukem 			fprintf(ttyout, "%s: not a plain file.\n", local);
    675   1.79     lukem 			code = -1;
    676   1.30     lukem 			goto cleanupsend;
    677    1.1       cgd 		}
    678   1.16     lukem 		filesize = st.st_size;
    679    1.1       cgd 	}
    680    1.1       cgd 	if (initconn()) {
    681   1.79     lukem 		code = -1;
    682   1.30     lukem 		goto cleanupsend;
    683    1.1       cgd 	}
    684   1.81     lukem 	if (sigsetjmp(xferabort, 1))
    685    1.1       cgd 		goto abort;
    686    1.1       cgd 
    687    1.1       cgd 	if (restart_point &&
    688    1.1       cgd 	    (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
    689    1.6       cgd 		int rc;
    690    1.6       cgd 
    691   1.21     lukem 		rc = -1;
    692    1.6       cgd 		switch (curtype) {
    693    1.6       cgd 		case TYPE_A:
    694  1.115     lukem 			rc = fseeko(fin, restart_point, SEEK_SET);
    695    1.6       cgd 			break;
    696    1.6       cgd 		case TYPE_I:
    697    1.6       cgd 		case TYPE_L:
    698    1.6       cgd 			rc = lseek(fileno(fin), restart_point, SEEK_SET);
    699    1.6       cgd 			break;
    700    1.6       cgd 		}
    701    1.6       cgd 		if (rc < 0) {
    702    1.6       cgd 			warn("local: %s", local);
    703   1.30     lukem 			goto cleanupsend;
    704    1.1       cgd 		}
    705  1.107     lukem 		if (command("REST " LLF, (LLT)restart_point) != CONTINUE)
    706   1.30     lukem 			goto cleanupsend;
    707  1.119     lukem 		lmode = "r+";
    708    1.1       cgd 	}
    709    1.1       cgd 	if (remote) {
    710   1.85     lukem 		if (command("%s %s", cmd, remote) != PRELIM)
    711   1.30     lukem 			goto cleanupsend;
    712   1.85     lukem 	} else {
    713   1.85     lukem 		if (command("%s", cmd) != PRELIM)
    714   1.30     lukem 			goto cleanupsend;
    715   1.85     lukem 	}
    716  1.121     lukem 	dirchange = 1;
    717    1.1       cgd 	dout = dataconn(lmode);
    718    1.1       cgd 	if (dout == NULL)
    719    1.1       cgd 		goto abort;
    720   1.64     lukem 
    721   1.64     lukem 	if (sndbuf_size > bufsize) {
    722   1.64     lukem 		if (buf)
    723   1.64     lukem 			(void)free(buf);
    724   1.64     lukem 		bufsize = sndbuf_size;
    725  1.136  christos 		buf = ftp_malloc(bufsize);
    726   1.64     lukem 	}
    727   1.64     lukem 
    728   1.16     lukem 	progressmeter(-1);
    729   1.67     lukem 	oldintp = xsignal(SIGPIPE, SIG_IGN);
    730   1.64     lukem 
    731    1.1       cgd 	switch (curtype) {
    732    1.1       cgd 
    733    1.1       cgd 	case TYPE_I:
    734    1.1       cgd 	case TYPE_L:
    735   1.89     lukem 		if (rate_put) {		/* rate limited */
    736   1.89     lukem 			while (1) {
    737   1.89     lukem 				struct timeval then, now, td;
    738   1.89     lukem 				off_t bufrem;
    739   1.46     lukem 
    740   1.62     lukem 				(void)gettimeofday(&then, NULL);
    741   1.89     lukem 				errno = c = d = 0;
    742   1.89     lukem 				bufrem = rate_put;
    743   1.89     lukem 				while (bufrem > 0) {
    744   1.89     lukem 					if ((c = read(fileno(fin), buf,
    745   1.89     lukem 					    MIN(bufsize, bufrem))) <= 0)
    746   1.89     lukem 						goto senddone;
    747   1.89     lukem 					bytes += c;
    748   1.89     lukem 					bufrem -= c;
    749   1.89     lukem 					for (bufp = buf; c > 0;
    750   1.89     lukem 					    c -= d, bufp += d)
    751   1.89     lukem 						if ((d = write(fileno(dout),
    752   1.89     lukem 						    bufp, c)) <= 0)
    753   1.89     lukem 							break;
    754   1.89     lukem 					if (d < 0)
    755   1.89     lukem 						goto senddone;
    756   1.89     lukem 					if (hash &&
    757   1.89     lukem 					    (!progress || filesize < 0) ) {
    758   1.89     lukem 						while (bytes >= hashbytes) {
    759   1.89     lukem 							(void)putc('#', ttyout);
    760   1.89     lukem 							hashbytes += mark;
    761   1.89     lukem 						}
    762   1.89     lukem 						(void)fflush(ttyout);
    763   1.89     lukem 					}
    764   1.89     lukem 				}
    765   1.89     lukem 				while (1) {
    766   1.89     lukem 					(void)gettimeofday(&now, NULL);
    767   1.89     lukem 					timersub(&now, &then, &td);
    768   1.89     lukem 					if (td.tv_sec > 0)
    769   1.89     lukem 						break;
    770   1.89     lukem 					usleep(1000000 - td.tv_usec);
    771   1.89     lukem 				}
    772   1.89     lukem 			}
    773  1.102     lukem 		} else {		/* simpler/faster; no rate limit */
    774   1.89     lukem 			while (1) {
    775   1.89     lukem 				errno = c = d = 0;
    776   1.89     lukem 				if ((c = read(fileno(fin), buf, bufsize)) <= 0)
    777   1.46     lukem 					goto senddone;
    778   1.46     lukem 				bytes += c;
    779   1.46     lukem 				for (bufp = buf; c > 0; c -= d, bufp += d)
    780   1.46     lukem 					if ((d = write(fileno(dout), bufp, c))
    781   1.46     lukem 					    <= 0)
    782   1.46     lukem 						break;
    783   1.46     lukem 				if (d < 0)
    784   1.46     lukem 					goto senddone;
    785   1.46     lukem 				if (hash && (!progress || filesize < 0) ) {
    786   1.46     lukem 					while (bytes >= hashbytes) {
    787   1.46     lukem 						(void)putc('#', ttyout);
    788   1.46     lukem 						hashbytes += mark;
    789   1.46     lukem 					}
    790   1.46     lukem 					(void)fflush(ttyout);
    791   1.46     lukem 				}
    792   1.46     lukem 			}
    793    1.1       cgd 		}
    794   1.46     lukem  senddone:
    795   1.22     lukem 		if (hash && (!progress || filesize < 0) && bytes > 0) {
    796   1.14     lukem 			if (bytes < mark)
    797   1.35     lukem 				(void)putc('#', ttyout);
    798   1.35     lukem 			(void)putc('\n', ttyout);
    799    1.1       cgd 		}
    800    1.1       cgd 		if (c < 0)
    801    1.6       cgd 			warn("local: %s", local);
    802    1.1       cgd 		if (d < 0) {
    803   1.14     lukem 			if (errno != EPIPE)
    804    1.6       cgd 				warn("netout");
    805    1.1       cgd 			bytes = -1;
    806    1.1       cgd 		}
    807    1.1       cgd 		break;
    808    1.1       cgd 
    809    1.1       cgd 	case TYPE_A:
    810    1.1       cgd 		while ((c = getc(fin)) != EOF) {
    811    1.1       cgd 			if (c == '\n') {
    812   1.22     lukem 				while (hash && (!progress || filesize < 0) &&
    813   1.16     lukem 				    (bytes >= hashbytes)) {
    814   1.35     lukem 					(void)putc('#', ttyout);
    815   1.35     lukem 					(void)fflush(ttyout);
    816   1.14     lukem 					hashbytes += mark;
    817    1.1       cgd 				}
    818    1.1       cgd 				if (ferror(dout))
    819    1.1       cgd 					break;
    820   1.23     lukem 				(void)putc('\r', dout);
    821    1.1       cgd 				bytes++;
    822    1.1       cgd 			}
    823   1.23     lukem 			(void)putc(c, dout);
    824    1.1       cgd 			bytes++;
    825   1.16     lukem #if 0	/* this violates RFC */
    826   1.16     lukem 			if (c == '\r') {
    827   1.16     lukem 				(void)putc('\0', dout);
    828   1.16     lukem 				bytes++;
    829   1.16     lukem 			}
    830   1.16     lukem #endif
    831    1.1       cgd 		}
    832   1.22     lukem 		if (hash && (!progress || filesize < 0)) {
    833    1.1       cgd 			if (bytes < hashbytes)
    834   1.35     lukem 				(void)putc('#', ttyout);
    835   1.35     lukem 			(void)putc('\n', ttyout);
    836    1.1       cgd 		}
    837    1.1       cgd 		if (ferror(fin))
    838    1.6       cgd 			warn("local: %s", local);
    839    1.1       cgd 		if (ferror(dout)) {
    840    1.1       cgd 			if (errno != EPIPE)
    841    1.6       cgd 				warn("netout");
    842    1.1       cgd 			bytes = -1;
    843    1.1       cgd 		}
    844    1.1       cgd 		break;
    845    1.1       cgd 	}
    846   1.78     lukem 
    847   1.22     lukem 	progressmeter(1);
    848   1.78     lukem 	if (closefunc != NULL) {
    849    1.1       cgd 		(*closefunc)(fin);
    850   1.78     lukem 		fin = NULL;
    851   1.78     lukem 	}
    852   1.79     lukem 	(void)fclose(dout);
    853   1.79     lukem 	dout = NULL;
    854   1.23     lukem 	(void)getreply(0);
    855    1.1       cgd 	if (bytes > 0)
    856   1.16     lukem 		ptransfer(0);
    857   1.30     lukem 	goto cleanupsend;
    858   1.78     lukem 
    859  1.102     lukem  abort:
    860   1.80     lukem 	(void)xsignal(SIGINT, oldintr);
    861   1.80     lukem 	oldintr = NULL;
    862   1.78     lukem 	if (!cpend) {
    863   1.79     lukem 		code = -1;
    864   1.78     lukem 		goto cleanupsend;
    865   1.78     lukem 	}
    866   1.80     lukem 	if (data >= 0) {
    867   1.80     lukem 		(void)close(data);
    868   1.80     lukem 		data = -1;
    869   1.80     lukem 	}
    870   1.80     lukem 	if (dout) {
    871   1.80     lukem 		(void)fclose(dout);
    872   1.80     lukem 		dout = NULL;
    873   1.80     lukem 	}
    874   1.78     lukem 	(void)getreply(0);
    875   1.79     lukem 	code = -1;
    876   1.78     lukem 	if (bytes > 0)
    877   1.78     lukem 		ptransfer(0);
    878   1.78     lukem 
    879  1.102     lukem  cleanupsend:
    880   1.81     lukem 	if (oldintr)
    881   1.81     lukem 		(void)xsignal(SIGINT, oldintr);
    882   1.81     lukem 	if (oldintp)
    883   1.81     lukem 		(void)xsignal(SIGPIPE, oldintp);
    884   1.80     lukem 	if (data >= 0) {
    885   1.80     lukem 		(void)close(data);
    886   1.80     lukem 		data = -1;
    887   1.80     lukem 	}
    888   1.78     lukem 	if (closefunc != NULL && fin != NULL)
    889   1.78     lukem 		(*closefunc)(fin);
    890   1.78     lukem 	if (dout)
    891   1.78     lukem 		(void)fclose(dout);
    892   1.30     lukem 	progress = oprogress;
    893   1.30     lukem 	restart_point = 0;
    894   1.78     lukem 	bytes = 0;
    895    1.1       cgd }
    896    1.1       cgd 
    897    1.6       cgd void
    898   1.95     lukem recvrequest(const char *cmd, const char *local, const char *remote,
    899   1.95     lukem 	    const char *lmode, int printnames, int ignorespecial)
    900    1.1       cgd {
    901   1.26     lukem 	FILE *fout, *din;
    902   1.95     lukem 	int (*closefunc)(FILE *);
    903   1.90     lukem 	sigfunc oldintr, oldintp;
    904   1.26     lukem 	int c, d;
    905   1.26     lukem 	volatile int is_retr, tcrflag, bare_lfs;
    906   1.47     lukem 	static size_t bufsize;
    907   1.47     lukem 	static char *buf;
    908   1.26     lukem 	volatile off_t hashbytes;
    909    1.1       cgd 	struct stat st;
    910   1.15     lukem 	time_t mtime;
    911   1.16     lukem 	struct timeval tval[2];
    912   1.23     lukem 	int oprogress;
    913   1.24     lukem 	int opreserve;
    914    1.1       cgd 
    915   1.35     lukem #ifdef __GNUC__			/* to shut up gcc warnings */
    916   1.26     lukem 	(void)&local;
    917   1.26     lukem 	(void)&fout;
    918   1.26     lukem 	(void)&din;
    919   1.26     lukem 	(void)&closefunc;
    920   1.26     lukem 	(void)&oldintr;
    921   1.26     lukem 	(void)&oldintp;
    922   1.26     lukem #endif
    923   1.26     lukem 
    924   1.26     lukem 	fout = NULL;
    925   1.26     lukem 	din = NULL;
    926   1.16     lukem 	hashbytes = mark;
    927   1.14     lukem 	direction = "received";
    928   1.14     lukem 	bytes = 0;
    929   1.26     lukem 	bare_lfs = 0;
    930   1.16     lukem 	filesize = -1;
    931   1.23     lukem 	oprogress = progress;
    932   1.24     lukem 	opreserve = preserve;
    933   1.30     lukem 	is_retr = (strcmp(cmd, "RETR") == 0);
    934    1.1       cgd 	if (is_retr && verbose && printnames) {
    935  1.139  christos 		if (ignorespecial || *local != '-')
    936   1.35     lukem 			fprintf(ttyout, "local: %s ", local);
    937    1.1       cgd 		if (remote)
    938   1.35     lukem 			fprintf(ttyout, "remote: %s\n", remote);
    939    1.1       cgd 	}
    940    1.1       cgd 	if (proxy && is_retr) {
    941    1.1       cgd 		proxtrans(cmd, local, remote);
    942    1.1       cgd 		return;
    943    1.1       cgd 	}
    944    1.1       cgd 	closefunc = NULL;
    945    1.1       cgd 	oldintr = NULL;
    946    1.1       cgd 	oldintp = NULL;
    947    1.1       cgd 	tcrflag = !crflag && is_retr;
    948   1.81     lukem 	if (sigsetjmp(xferabort, 1)) {
    949   1.85     lukem 		while (cpend)
    950   1.23     lukem 			(void)getreply(0);
    951   1.79     lukem 		code = -1;
    952   1.78     lukem 		goto cleanuprecv;
    953    1.1       cgd 	}
    954   1.80     lukem 	(void)xsignal(SIGQUIT, psummary);
    955   1.81     lukem 	oldintr = xsignal(SIGINT, abortxfer);
    956   1.27     lukem 	if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
    957   1.28     lukem 		if (access(local, W_OK) < 0) {
    958    1.6       cgd 			char *dir = strrchr(local, '/');
    959    1.1       cgd 
    960    1.1       cgd 			if (errno != ENOENT && errno != EACCES) {
    961    1.6       cgd 				warn("local: %s", local);
    962   1.79     lukem 				code = -1;
    963   1.78     lukem 				goto cleanuprecv;
    964    1.1       cgd 			}
    965    1.1       cgd 			if (dir != NULL)
    966    1.1       cgd 				*dir = 0;
    967   1.46     lukem 			d = access(dir == local ? "/" :
    968   1.46     lukem 			    dir ? local : ".", W_OK);
    969    1.1       cgd 			if (dir != NULL)
    970    1.1       cgd 				*dir = '/';
    971    1.1       cgd 			if (d < 0) {
    972    1.6       cgd 				warn("local: %s", local);
    973   1.79     lukem 				code = -1;
    974   1.78     lukem 				goto cleanuprecv;
    975    1.1       cgd 			}
    976    1.1       cgd 			if (!runique && errno == EACCES &&
    977   1.35     lukem 			    chmod(local, (S_IRUSR|S_IWUSR)) < 0) {
    978    1.6       cgd 				warn("local: %s", local);
    979   1.79     lukem 				code = -1;
    980   1.78     lukem 				goto cleanuprecv;
    981    1.1       cgd 			}
    982    1.1       cgd 			if (runique && errno == EACCES &&
    983    1.1       cgd 			   (local = gunique(local)) == NULL) {
    984   1.79     lukem 				code = -1;
    985   1.78     lukem 				goto cleanuprecv;
    986    1.1       cgd 			}
    987    1.1       cgd 		}
    988    1.1       cgd 		else if (runique && (local = gunique(local)) == NULL) {
    989   1.79     lukem 			code = -1;
    990   1.78     lukem 			goto cleanuprecv;
    991    1.1       cgd 		}
    992    1.1       cgd 	}
    993    1.1       cgd 	if (!is_retr) {
    994    1.1       cgd 		if (curtype != TYPE_A)
    995    1.1       cgd 			changetype(TYPE_A, 0);
    996   1.16     lukem 	} else {
    997   1.16     lukem 		if (curtype != type)
    998   1.16     lukem 			changetype(type, 0);
    999   1.19     lukem 		filesize = remotesize(remote, 0);
   1000   1.85     lukem 		if (code == 421 || code == -1)
   1001   1.85     lukem 			goto cleanuprecv;
   1002   1.16     lukem 	}
   1003    1.1       cgd 	if (initconn()) {
   1004   1.79     lukem 		code = -1;
   1005   1.78     lukem 		goto cleanuprecv;
   1006    1.1       cgd 	}
   1007   1.81     lukem 	if (sigsetjmp(xferabort, 1))
   1008    1.1       cgd 		goto abort;
   1009    1.1       cgd 	if (is_retr && restart_point &&
   1010  1.107     lukem 	    command("REST " LLF, (LLT) restart_point) != CONTINUE)
   1011   1.78     lukem 		goto cleanuprecv;
   1012   1.88     lukem 	if (! EMPTYSTRING(remote)) {
   1013   1.85     lukem 		if (command("%s %s", cmd, remote) != PRELIM)
   1014   1.78     lukem 			goto cleanuprecv;
   1015    1.1       cgd 	} else {
   1016   1.85     lukem 		if (command("%s", cmd) != PRELIM)
   1017   1.78     lukem 			goto cleanuprecv;
   1018    1.1       cgd 	}
   1019    1.1       cgd 	din = dataconn("r");
   1020    1.1       cgd 	if (din == NULL)
   1021    1.1       cgd 		goto abort;
   1022   1.27     lukem 	if (!ignorespecial && strcmp(local, "-") == 0) {
   1023    1.1       cgd 		fout = stdout;
   1024   1.23     lukem 		progress = 0;
   1025   1.24     lukem 		preserve = 0;
   1026   1.27     lukem 	} else if (!ignorespecial && *local == '|') {
   1027   1.67     lukem 		oldintp = xsignal(SIGPIPE, SIG_IGN);
   1028    1.1       cgd 		fout = popen(local + 1, "w");
   1029    1.1       cgd 		if (fout == NULL) {
   1030    1.6       cgd 			warn("%s", local+1);
   1031    1.1       cgd 			goto abort;
   1032    1.1       cgd 		}
   1033   1.23     lukem 		progress = 0;
   1034   1.24     lukem 		preserve = 0;
   1035    1.1       cgd 		closefunc = pclose;
   1036    1.1       cgd 	} else {
   1037    1.1       cgd 		fout = fopen(local, lmode);
   1038    1.1       cgd 		if (fout == NULL) {
   1039    1.6       cgd 			warn("local: %s", local);
   1040    1.1       cgd 			goto abort;
   1041    1.1       cgd 		}
   1042    1.1       cgd 		closefunc = fclose;
   1043    1.1       cgd 	}
   1044   1.46     lukem 
   1045   1.64     lukem 	if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) {
   1046   1.64     lukem 		progress = 0;
   1047   1.64     lukem 		preserve = 0;
   1048   1.64     lukem 	}
   1049   1.64     lukem 	if (rcvbuf_size > bufsize) {
   1050    1.1       cgd 		if (buf)
   1051   1.23     lukem 			(void)free(buf);
   1052   1.64     lukem 		bufsize = rcvbuf_size;
   1053  1.136  christos 		buf = ftp_malloc(bufsize);
   1054    1.1       cgd 	}
   1055   1.64     lukem 
   1056   1.16     lukem 	progressmeter(-1);
   1057   1.64     lukem 
   1058    1.1       cgd 	switch (curtype) {
   1059    1.1       cgd 
   1060    1.1       cgd 	case TYPE_I:
   1061    1.1       cgd 	case TYPE_L:
   1062   1.30     lukem 		if (is_retr && restart_point &&
   1063    1.6       cgd 		    lseek(fileno(fout), restart_point, SEEK_SET) < 0) {
   1064    1.6       cgd 			warn("local: %s", local);
   1065   1.78     lukem 			goto cleanuprecv;
   1066    1.1       cgd 		}
   1067   1.89     lukem 		if (rate_get) {		/* rate limiting */
   1068   1.89     lukem 			while (1) {
   1069   1.89     lukem 				struct timeval then, now, td;
   1070   1.89     lukem 				off_t bufrem;
   1071   1.46     lukem 
   1072   1.62     lukem 				(void)gettimeofday(&then, NULL);
   1073   1.89     lukem 				errno = c = d = 0;
   1074   1.89     lukem 				for (bufrem = rate_get; bufrem > 0; ) {
   1075   1.89     lukem 					if ((c = read(fileno(din), buf,
   1076   1.89     lukem 					    MIN(bufsize, bufrem))) <= 0)
   1077   1.89     lukem 						goto recvdone;
   1078   1.89     lukem 					bytes += c;
   1079   1.89     lukem 					bufrem -=c;
   1080   1.89     lukem 					if ((d = write(fileno(fout), buf, c))
   1081   1.89     lukem 					    != c)
   1082   1.89     lukem 						goto recvdone;
   1083   1.89     lukem 					if (hash &&
   1084   1.89     lukem 					    (!progress || filesize < 0)) {
   1085   1.89     lukem 						while (bytes >= hashbytes) {
   1086   1.89     lukem 							(void)putc('#', ttyout);
   1087   1.89     lukem 							hashbytes += mark;
   1088   1.89     lukem 						}
   1089   1.89     lukem 						(void)fflush(ttyout);
   1090   1.89     lukem 					}
   1091   1.89     lukem 				}
   1092   1.89     lukem 					/* sleep until time is up */
   1093   1.89     lukem 				while (1) {
   1094   1.89     lukem 					(void)gettimeofday(&now, NULL);
   1095   1.89     lukem 					timersub(&now, &then, &td);
   1096   1.89     lukem 					if (td.tv_sec > 0)
   1097   1.89     lukem 						break;
   1098   1.89     lukem 					usleep(1000000 - td.tv_usec);
   1099   1.89     lukem 				}
   1100   1.89     lukem 			}
   1101   1.89     lukem 		} else {		/* faster code (no limiting) */
   1102   1.89     lukem 			while (1) {
   1103   1.89     lukem 				errno = c = d = 0;
   1104   1.89     lukem 				if ((c = read(fileno(din), buf, bufsize)) <= 0)
   1105   1.46     lukem 					goto recvdone;
   1106   1.46     lukem 				bytes += c;
   1107   1.46     lukem 				if ((d = write(fileno(fout), buf, c)) != c)
   1108   1.46     lukem 					goto recvdone;
   1109   1.46     lukem 				if (hash && (!progress || filesize < 0)) {
   1110   1.46     lukem 					while (bytes >= hashbytes) {
   1111   1.46     lukem 						(void)putc('#', ttyout);
   1112   1.46     lukem 						hashbytes += mark;
   1113   1.46     lukem 					}
   1114   1.46     lukem 					(void)fflush(ttyout);
   1115    1.1       cgd 				}
   1116    1.1       cgd 			}
   1117    1.1       cgd 		}
   1118   1.46     lukem  recvdone:
   1119   1.22     lukem 		if (hash && (!progress || filesize < 0) && bytes > 0) {
   1120   1.14     lukem 			if (bytes < mark)
   1121   1.35     lukem 				(void)putc('#', ttyout);
   1122   1.35     lukem 			(void)putc('\n', ttyout);
   1123    1.1       cgd 		}
   1124    1.1       cgd 		if (c < 0) {
   1125    1.1       cgd 			if (errno != EPIPE)
   1126    1.6       cgd 				warn("netin");
   1127    1.1       cgd 			bytes = -1;
   1128    1.1       cgd 		}
   1129    1.1       cgd 		if (d < c) {
   1130    1.1       cgd 			if (d < 0)
   1131    1.6       cgd 				warn("local: %s", local);
   1132    1.1       cgd 			else
   1133    1.6       cgd 				warnx("%s: short write", local);
   1134    1.1       cgd 		}
   1135    1.1       cgd 		break;
   1136    1.1       cgd 
   1137    1.1       cgd 	case TYPE_A:
   1138   1.30     lukem 		if (is_retr && restart_point) {
   1139   1.30     lukem 			int ch;
   1140  1.115     lukem 			off_t i;
   1141    1.1       cgd 
   1142  1.115     lukem 			if (fseeko(fout, (off_t)0, SEEK_SET) < 0)
   1143    1.1       cgd 				goto done;
   1144  1.115     lukem 			for (i = 0; i++ < restart_point;) {
   1145    1.1       cgd 				if ((ch = getc(fout)) == EOF)
   1146    1.1       cgd 					goto done;
   1147    1.1       cgd 				if (ch == '\n')
   1148    1.1       cgd 					i++;
   1149    1.1       cgd 			}
   1150  1.115     lukem 			if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) {
   1151  1.102     lukem  done:
   1152    1.6       cgd 				warn("local: %s", local);
   1153   1.78     lukem 				goto cleanuprecv;
   1154    1.1       cgd 			}
   1155    1.1       cgd 		}
   1156    1.1       cgd 		while ((c = getc(din)) != EOF) {
   1157    1.1       cgd 			if (c == '\n')
   1158    1.1       cgd 				bare_lfs++;
   1159    1.1       cgd 			while (c == '\r') {
   1160   1.22     lukem 				while (hash && (!progress || filesize < 0) &&
   1161   1.16     lukem 				    (bytes >= hashbytes)) {
   1162   1.35     lukem 					(void)putc('#', ttyout);
   1163   1.35     lukem 					(void)fflush(ttyout);
   1164   1.14     lukem 					hashbytes += mark;
   1165    1.1       cgd 				}
   1166    1.1       cgd 				bytes++;
   1167    1.1       cgd 				if ((c = getc(din)) != '\n' || tcrflag) {
   1168    1.1       cgd 					if (ferror(fout))
   1169    1.1       cgd 						goto break2;
   1170   1.23     lukem 					(void)putc('\r', fout);
   1171    1.1       cgd 					if (c == '\0') {
   1172    1.1       cgd 						bytes++;
   1173    1.1       cgd 						goto contin2;
   1174    1.1       cgd 					}
   1175    1.1       cgd 					if (c == EOF)
   1176    1.1       cgd 						goto contin2;
   1177    1.1       cgd 				}
   1178    1.1       cgd 			}
   1179   1.23     lukem 			(void)putc(c, fout);
   1180    1.1       cgd 			bytes++;
   1181    1.1       cgd 	contin2:	;
   1182    1.1       cgd 		}
   1183  1.114     lukem  break2:
   1184   1.22     lukem 		if (hash && (!progress || filesize < 0)) {
   1185    1.1       cgd 			if (bytes < hashbytes)
   1186   1.35     lukem 				(void)putc('#', ttyout);
   1187   1.35     lukem 			(void)putc('\n', ttyout);
   1188    1.1       cgd 		}
   1189    1.1       cgd 		if (ferror(din)) {
   1190    1.1       cgd 			if (errno != EPIPE)
   1191    1.6       cgd 				warn("netin");
   1192    1.1       cgd 			bytes = -1;
   1193    1.1       cgd 		}
   1194    1.1       cgd 		if (ferror(fout))
   1195    1.6       cgd 			warn("local: %s", local);
   1196    1.1       cgd 		break;
   1197    1.1       cgd 	}
   1198   1.78     lukem 
   1199   1.22     lukem 	progressmeter(1);
   1200   1.78     lukem 	if (closefunc != NULL) {
   1201    1.1       cgd 		(*closefunc)(fout);
   1202   1.78     lukem 		fout = NULL;
   1203   1.78     lukem 	}
   1204   1.79     lukem 	(void)fclose(din);
   1205   1.79     lukem 	din = NULL;
   1206   1.23     lukem 	(void)getreply(0);
   1207   1.43     lukem 	if (bare_lfs) {
   1208   1.43     lukem 		fprintf(ttyout,
   1209   1.43     lukem 		    "WARNING! %d bare linefeeds received in ASCII mode.\n",
   1210   1.43     lukem 		    bare_lfs);
   1211   1.43     lukem 		fputs("File may not have transferred correctly.\n", ttyout);
   1212   1.43     lukem 	}
   1213   1.19     lukem 	if (bytes >= 0 && is_retr) {
   1214   1.19     lukem 		if (bytes > 0)
   1215   1.19     lukem 			ptransfer(0);
   1216   1.15     lukem 		if (preserve && (closefunc == fclose)) {
   1217   1.19     lukem 			mtime = remotemodtime(remote, 0);
   1218   1.15     lukem 			if (mtime != -1) {
   1219   1.31     lukem 				(void)gettimeofday(&tval[0], NULL);
   1220   1.16     lukem 				tval[1].tv_sec = mtime;
   1221   1.16     lukem 				tval[1].tv_usec = 0;
   1222   1.16     lukem 				if (utimes(local, tval) == -1) {
   1223   1.35     lukem 					fprintf(ttyout,
   1224   1.23     lukem 				"Can't change modification time on %s to %s",
   1225   1.23     lukem 					    local, asctime(localtime(&mtime)));
   1226   1.15     lukem 				}
   1227   1.15     lukem 			}
   1228   1.15     lukem 		}
   1229   1.15     lukem 	}
   1230   1.78     lukem 	goto cleanuprecv;
   1231   1.23     lukem 
   1232  1.102     lukem  abort:
   1233   1.78     lukem 			/*
   1234   1.78     lukem 			 * abort using RFC 959 recommended IP,SYNC sequence
   1235   1.78     lukem 			 */
   1236   1.82     lukem 	if (! sigsetjmp(xferabort, 1)) {
   1237   1.82     lukem 			/* this is the first call */
   1238   1.82     lukem 		(void)xsignal(SIGINT, abort_squared);
   1239   1.82     lukem 		if (!cpend) {
   1240   1.82     lukem 			code = -1;
   1241   1.82     lukem 			goto cleanuprecv;
   1242   1.82     lukem 		}
   1243   1.82     lukem 		abort_remote(din);
   1244   1.78     lukem 	}
   1245   1.80     lukem 	code = -1;
   1246   1.78     lukem 	if (bytes > 0)
   1247   1.78     lukem 		ptransfer(0);
   1248    1.1       cgd 
   1249  1.102     lukem  cleanuprecv:
   1250   1.81     lukem 	if (oldintr)
   1251   1.81     lukem 		(void)xsignal(SIGINT, oldintr);
   1252   1.81     lukem 	if (oldintp)
   1253   1.81     lukem 		(void)xsignal(SIGPIPE, oldintp);
   1254   1.80     lukem 	if (data >= 0) {
   1255   1.80     lukem 		(void)close(data);
   1256   1.80     lukem 		data = -1;
   1257   1.80     lukem 	}
   1258   1.78     lukem 	if (closefunc != NULL && fout != NULL)
   1259   1.78     lukem 		(*closefunc)(fout);
   1260   1.78     lukem 	if (din)
   1261   1.78     lukem 		(void)fclose(din);
   1262   1.78     lukem 	progress = oprogress;
   1263   1.78     lukem 	preserve = opreserve;
   1264   1.78     lukem 	bytes = 0;
   1265    1.1       cgd }
   1266    1.1       cgd 
   1267    1.1       cgd /*
   1268    1.1       cgd  * Need to start a listen on the data channel before we send the command,
   1269    1.1       cgd  * otherwise the server's connect may fail.
   1270    1.1       cgd  */
   1271    1.6       cgd int
   1272   1.95     lukem initconn(void)
   1273    1.1       cgd {
   1274    1.6       cgd 	char *p, *a;
   1275  1.132     lukem 	int result, tmpno = 0;
   1276    1.1       cgd 	int on = 1;
   1277   1.48    itojun 	int error;
   1278  1.133     lukem 	unsigned int addr[16], port[2];
   1279  1.133     lukem 	unsigned int af, hal, pal;
   1280  1.132     lukem 	socklen_t len;
   1281   1.48    itojun 	char *pasvcmd = NULL;
   1282    1.8       cgd 
   1283   1.62     lukem #ifdef INET6
   1284  1.135  christos #ifndef NO_DEBUG
   1285  1.137  christos 	if (myctladdr.su_family == AF_INET6 && ftp_debug &&
   1286  1.104     lukem 	    (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) ||
   1287  1.104     lukem 	     IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) {
   1288   1.59    itojun 		warnx("use of scoped address can be troublesome");
   1289   1.59    itojun 	}
   1290   1.62     lukem #endif
   1291  1.135  christos #endif
   1292  1.102     lukem  reinit:
   1293    1.8       cgd 	if (passivemode) {
   1294   1.48    itojun 		data_addr = myctladdr;
   1295   1.48    itojun 		data = socket(data_addr.su_family, SOCK_STREAM, 0);
   1296    1.8       cgd 		if (data < 0) {
   1297   1.19     lukem 			warn("socket");
   1298   1.21     lukem 			return (1);
   1299    1.8       cgd 		}
   1300    1.8       cgd 		if ((options & SO_DEBUG) &&
   1301  1.130     lukem 		    setsockopt(data, SOL_SOCKET, SO_DEBUG,
   1302  1.130     lukem 				(void *)&on, sizeof(on)) == -1) {
   1303  1.135  christos 			DWARN("setsockopt %s (ignored)", "SO_DEBUG");
   1304  1.130     lukem 		}
   1305   1.54    itojun 		result = COMPLETE + 1;
   1306   1.48    itojun 		switch (data_addr.su_family) {
   1307   1.48    itojun 		case AF_INET:
   1308   1.74     lukem 			if (epsv4 && !epsv4bad) {
   1309  1.128     lukem 				pasvcmd = "EPSV";
   1310  1.110        is 				result = command("EPSV");
   1311   1.85     lukem 				if (!connected)
   1312   1.85     lukem 					return (1);
   1313   1.55    itojun 				/*
   1314   1.55    itojun 				 * this code is to be friendly with broken
   1315   1.55    itojun 				 * BSDI ftpd
   1316   1.55    itojun 				 */
   1317   1.56    itojun 				if (code / 10 == 22 && code != 229) {
   1318   1.55    itojun 					fputs(
   1319   1.55    itojun "wrong server: return code must be 229\n",
   1320   1.55    itojun 						ttyout);
   1321   1.55    itojun 					result = COMPLETE + 1;
   1322   1.55    itojun 				}
   1323   1.74     lukem 				if (result != COMPLETE) {
   1324   1.74     lukem 					epsv4bad = 1;
   1325  1.135  christos 					DPRINTF("disabling epsv4 for this "
   1326  1.135  christos 					    "connection\n");
   1327   1.74     lukem 				}
   1328   1.55    itojun 			}
   1329   1.85     lukem 			if (result != COMPLETE) {
   1330  1.128     lukem 				pasvcmd = "PASV";
   1331  1.110        is 				result = command("PASV");
   1332   1.85     lukem 				if (!connected)
   1333   1.85     lukem 					return (1);
   1334   1.85     lukem 			}
   1335   1.48    itojun 			break;
   1336   1.62     lukem #ifdef INET6
   1337   1.48    itojun 		case AF_INET6:
   1338  1.128     lukem 			pasvcmd = "EPSV";
   1339  1.110        is 			result = command("EPSV");
   1340   1.85     lukem 			if (!connected)
   1341   1.85     lukem 				return (1);
   1342   1.55    itojun 			/* this code is to be friendly with broken BSDI ftpd */
   1343   1.56    itojun 			if (code / 10 == 22 && code != 229) {
   1344   1.55    itojun 				fputs(
   1345   1.55    itojun "wrong server: return code must be 229\n",
   1346   1.55    itojun 					ttyout);
   1347   1.55    itojun 				result = COMPLETE + 1;
   1348   1.55    itojun 			}
   1349  1.110        is 			if (result != COMPLETE) {
   1350  1.110        is 				pasvcmd = "LPSV";
   1351  1.110        is 				result = command("LPSV");
   1352  1.110        is 			}
   1353   1.85     lukem 			if (!connected)
   1354   1.85     lukem 				return (1);
   1355   1.48    itojun 			break;
   1356   1.62     lukem #endif
   1357   1.48    itojun 		default:
   1358   1.57    itojun 			result = COMPLETE + 1;
   1359   1.54    itojun 			break;
   1360   1.48    itojun 		}
   1361   1.48    itojun 		if (result != COMPLETE) {
   1362   1.35     lukem 			if (activefallback) {
   1363   1.35     lukem 				(void)close(data);
   1364   1.35     lukem 				data = -1;
   1365   1.35     lukem 				passivemode = 0;
   1366   1.85     lukem #if 0
   1367   1.35     lukem 				activefallback = 0;
   1368   1.85     lukem #endif
   1369   1.35     lukem 				goto reinit;
   1370   1.35     lukem 			}
   1371   1.35     lukem 			fputs("Passive mode refused.\n", ttyout);
   1372    1.8       cgd 			goto bad;
   1373    1.8       cgd 		}
   1374    1.8       cgd 
   1375   1.85     lukem #define	pack2(var, off) \
   1376   1.48    itojun 	(((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
   1377   1.85     lukem #define	pack4(var, off) \
   1378   1.48    itojun 	(((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
   1379   1.48    itojun 	 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))
   1380  1.100     lukem #define	UC(b)	(((int)b)&0xff)
   1381   1.48    itojun 
   1382    1.8       cgd 		/*
   1383   1.48    itojun 		 * What we've got at this point is a string of comma separated
   1384   1.48    itojun 		 * one-byte unsigned integer values, separated by commas.
   1385    1.8       cgd 		 */
   1386   1.55    itojun 		if (strcmp(pasvcmd, "PASV") == 0) {
   1387   1.55    itojun 			if (data_addr.su_family != AF_INET) {
   1388   1.55    itojun 				fputs(
   1389  1.105     lukem     "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
   1390   1.55    itojun 				error = 1;
   1391   1.55    itojun 				goto bad;
   1392   1.55    itojun 			}
   1393   1.56    itojun 			if (code / 10 == 22 && code != 227) {
   1394   1.55    itojun 				fputs("wrong server: return code must be 227\n",
   1395   1.55    itojun 					ttyout);
   1396   1.55    itojun 				error = 1;
   1397   1.55    itojun 				goto bad;
   1398   1.55    itojun 			}
   1399   1.55    itojun 			error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
   1400   1.55    itojun 					&addr[0], &addr[1], &addr[2], &addr[3],
   1401   1.55    itojun 					&port[0], &port[1]);
   1402   1.55    itojun 			if (error != 6) {
   1403   1.55    itojun 				fputs(
   1404   1.55    itojun "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
   1405   1.55    itojun 				error = 1;
   1406   1.55    itojun 				goto bad;
   1407   1.55    itojun 			}
   1408   1.55    itojun 			error = 0;
   1409   1.55    itojun 			memset(&data_addr, 0, sizeof(data_addr));
   1410   1.55    itojun 			data_addr.su_family = AF_INET;
   1411   1.55    itojun 			data_addr.su_len = sizeof(struct sockaddr_in);
   1412  1.104     lukem 			data_addr.si_su.su_sin.sin_addr.s_addr =
   1413  1.104     lukem 			    htonl(pack4(addr, 0));
   1414   1.55    itojun 			data_addr.su_port = htons(pack2(port, 0));
   1415   1.55    itojun 		} else if (strcmp(pasvcmd, "LPSV") == 0) {
   1416   1.56    itojun 			if (code / 10 == 22 && code != 228) {
   1417   1.55    itojun 				fputs("wrong server: return code must be 228\n",
   1418   1.55    itojun 					ttyout);
   1419   1.55    itojun 				error = 1;
   1420   1.55    itojun 				goto bad;
   1421   1.55    itojun 			}
   1422   1.48    itojun 			switch (data_addr.su_family) {
   1423   1.48    itojun 			case AF_INET:
   1424   1.55    itojun 				error = sscanf(pasv,
   1425   1.55    itojun "%u,%u,%u,%u,%u,%u,%u,%u,%u",
   1426   1.57    itojun 					&af, &hal,
   1427   1.55    itojun 					&addr[0], &addr[1], &addr[2], &addr[3],
   1428   1.55    itojun 					&pal, &port[0], &port[1]);
   1429   1.57    itojun 				if (error != 9) {
   1430   1.55    itojun 					fputs(
   1431   1.57    itojun "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
   1432   1.55    itojun 					error = 1;
   1433   1.55    itojun 					goto bad;
   1434   1.55    itojun 				}
   1435   1.57    itojun 				if (af != 4 || hal != 4 || pal != 2) {
   1436   1.48    itojun 					fputs(
   1437   1.57    itojun "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
   1438   1.48    itojun 					error = 1;
   1439   1.48    itojun 					goto bad;
   1440   1.48    itojun 				}
   1441   1.57    itojun 
   1442   1.48    itojun 				error = 0;
   1443   1.48    itojun 				memset(&data_addr, 0, sizeof(data_addr));
   1444   1.48    itojun 				data_addr.su_family = AF_INET;
   1445   1.48    itojun 				data_addr.su_len = sizeof(struct sockaddr_in);
   1446  1.104     lukem 				data_addr.si_su.su_sin.sin_addr.s_addr =
   1447  1.104     lukem 				    htonl(pack4(addr, 0));
   1448   1.48    itojun 				data_addr.su_port = htons(pack2(port, 0));
   1449   1.48    itojun 				break;
   1450   1.62     lukem #ifdef INET6
   1451   1.48    itojun 			case AF_INET6:
   1452   1.48    itojun 				error = sscanf(pasv,
   1453   1.48    itojun "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
   1454   1.48    itojun 					&af, &hal,
   1455   1.48    itojun 					&addr[0], &addr[1], &addr[2], &addr[3],
   1456   1.48    itojun 					&addr[4], &addr[5], &addr[6], &addr[7],
   1457   1.48    itojun 					&addr[8], &addr[9], &addr[10],
   1458   1.48    itojun 					&addr[11], &addr[12], &addr[13],
   1459   1.48    itojun 					&addr[14], &addr[15],
   1460   1.48    itojun 					&pal, &port[0], &port[1]);
   1461   1.57    itojun 				if (error != 21) {
   1462   1.48    itojun 					fputs(
   1463   1.57    itojun "Passive mode address scan failure. Shouldn't happen!\n", ttyout);
   1464   1.48    itojun 					error = 1;
   1465   1.48    itojun 					goto bad;
   1466   1.48    itojun 				}
   1467   1.57    itojun 				if (af != 6 || hal != 16 || pal != 2) {
   1468   1.48    itojun 					fputs(
   1469   1.57    itojun "Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
   1470   1.48    itojun 					error = 1;
   1471   1.48    itojun 					goto bad;
   1472   1.48    itojun 				}
   1473    1.8       cgd 
   1474   1.48    itojun 				error = 0;
   1475   1.48    itojun 				memset(&data_addr, 0, sizeof(data_addr));
   1476   1.48    itojun 				data_addr.su_family = AF_INET6;
   1477   1.48    itojun 				data_addr.su_len = sizeof(struct sockaddr_in6);
   1478   1.60    itojun 			    {
   1479  1.100     lukem 				int i;
   1480  1.100     lukem 				for (i = 0; i < sizeof(struct in6_addr); i++) {
   1481  1.104     lukem 					data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] =
   1482  1.100     lukem 					    UC(addr[i]);
   1483  1.100     lukem 				}
   1484   1.60    itojun 			    }
   1485   1.48    itojun 				data_addr.su_port = htons(pack2(port, 0));
   1486   1.48    itojun 				break;
   1487   1.62     lukem #endif
   1488   1.48    itojun 			default:
   1489   1.48    itojun 				error = 1;
   1490   1.48    itojun 			}
   1491   1.48    itojun 		} else if (strcmp(pasvcmd, "EPSV") == 0) {
   1492   1.48    itojun 			char delim[4];
   1493   1.48    itojun 
   1494   1.48    itojun 			port[0] = 0;
   1495   1.56    itojun 			if (code / 10 == 22 && code != 229) {
   1496   1.55    itojun 				fputs("wrong server: return code must be 229\n",
   1497   1.55    itojun 					ttyout);
   1498   1.55    itojun 				error = 1;
   1499   1.55    itojun 				goto bad;
   1500   1.55    itojun 			}
   1501   1.48    itojun 			if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
   1502   1.48    itojun 					&delim[1], &delim[2], &port[1],
   1503   1.48    itojun 					&delim[3]) != 5) {
   1504   1.57    itojun 				fputs("parse error!\n", ttyout);
   1505   1.57    itojun 				error = 1;
   1506   1.48    itojun 				goto bad;
   1507   1.48    itojun 			}
   1508   1.48    itojun 			if (delim[0] != delim[1] || delim[0] != delim[2]
   1509   1.48    itojun 			 || delim[0] != delim[3]) {
   1510   1.57    itojun 				fputs("parse error!\n", ttyout);
   1511   1.57    itojun 				error = 1;
   1512   1.48    itojun 				goto bad;
   1513   1.48    itojun 			}
   1514   1.48    itojun 			data_addr = hisctladdr;
   1515   1.48    itojun 			data_addr.su_port = htons(port[1]);
   1516   1.48    itojun 		} else
   1517    1.8       cgd 			goto bad;
   1518    1.8       cgd 
   1519  1.136  christos 		while (ftp_connect(data, (struct sockaddr *)&data_addr.si_su,
   1520   1.48    itojun 			    data_addr.su_len) < 0) {
   1521   1.39     lukem 			if (activefallback) {
   1522   1.39     lukem 				(void)close(data);
   1523   1.39     lukem 				data = -1;
   1524   1.39     lukem 				passivemode = 0;
   1525   1.85     lukem #if 0
   1526   1.39     lukem 				activefallback = 0;
   1527   1.85     lukem #endif
   1528   1.39     lukem 				goto reinit;
   1529   1.39     lukem 			}
   1530  1.131     lukem 			warn("connect for data channel");
   1531    1.8       cgd 			goto bad;
   1532    1.8       cgd 		}
   1533   1.92     lukem #ifdef IPTOS_THROUGHPUT
   1534   1.48    itojun 		if (data_addr.su_family == AF_INET) {
   1535   1.48    itojun 			on = IPTOS_THROUGHPUT;
   1536  1.130     lukem 			if (setsockopt(data, IPPROTO_IP, IP_TOS,
   1537  1.131     lukem 					(void *)&on, sizeof(on)) == -1) {
   1538  1.135  christos 				DWARN("setsockopt %s (ignored)",
   1539  1.135  christos 				    "IPTOS_THROUGHPUT");
   1540  1.130     lukem 			}
   1541   1.48    itojun 		}
   1542   1.92     lukem #endif
   1543   1.21     lukem 		return (0);
   1544    1.8       cgd 	}
   1545    1.1       cgd 
   1546  1.102     lukem  noport:
   1547    1.1       cgd 	data_addr = myctladdr;
   1548    1.1       cgd 	if (sendport)
   1549   1.48    itojun 		data_addr.su_port = 0;	/* let system pick one */
   1550    1.1       cgd 	if (data != -1)
   1551   1.23     lukem 		(void)close(data);
   1552   1.48    itojun 	data = socket(data_addr.su_family, SOCK_STREAM, 0);
   1553    1.1       cgd 	if (data < 0) {
   1554    1.6       cgd 		warn("socket");
   1555    1.1       cgd 		if (tmpno)
   1556    1.1       cgd 			sendport = 1;
   1557    1.1       cgd 		return (1);
   1558    1.1       cgd 	}
   1559    1.1       cgd 	if (!sendport)
   1560  1.130     lukem 		if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR,
   1561  1.130     lukem 				(void *)&on, sizeof(on)) == -1) {
   1562  1.130     lukem 			warn("setsockopt %s", "SO_REUSEADDR");
   1563    1.1       cgd 			goto bad;
   1564    1.1       cgd 		}
   1565  1.104     lukem 	if (bind(data, (struct sockaddr *)&data_addr.si_su,
   1566  1.104     lukem 	    data_addr.su_len) < 0) {
   1567    1.6       cgd 		warn("bind");
   1568    1.1       cgd 		goto bad;
   1569    1.1       cgd 	}
   1570  1.130     lukem 	if ((options & SO_DEBUG) &&
   1571  1.130     lukem 	    setsockopt(data, SOL_SOCKET, SO_DEBUG,
   1572  1.130     lukem 			(void *)&on, sizeof(on)) == -1) {
   1573  1.135  christos 		DWARN("setsockopt %s (ignored)", "SO_DEBUG");
   1574  1.130     lukem 	}
   1575  1.105     lukem 	len = sizeof(data_addr.si_su);
   1576  1.105     lukem 	memset((char *)&data_addr, 0, sizeof (data_addr));
   1577  1.132     lukem 	if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) {
   1578    1.6       cgd 		warn("getsockname");
   1579    1.1       cgd 		goto bad;
   1580    1.1       cgd 	}
   1581  1.105     lukem 	data_addr.su_len = len;
   1582  1.136  christos 	if (ftp_listen(data, 1) < 0)
   1583    1.6       cgd 		warn("listen");
   1584   1.48    itojun 
   1585    1.1       cgd 	if (sendport) {
   1586  1.112    itojun 		char hname[NI_MAXHOST], sname[NI_MAXSERV];
   1587   1.48    itojun 		int af;
   1588  1.112    itojun 		struct sockinet tmp;
   1589   1.48    itojun 
   1590   1.48    itojun 		switch (data_addr.su_family) {
   1591   1.48    itojun 		case AF_INET:
   1592   1.74     lukem 			if (!epsv4 || epsv4bad) {
   1593   1.54    itojun 				result = COMPLETE + 1;
   1594   1.54    itojun 				break;
   1595   1.54    itojun 			}
   1596   1.54    itojun 			/* FALLTHROUGH */
   1597   1.58  christos #ifdef INET6
   1598   1.48    itojun 		case AF_INET6:
   1599  1.111    itojun #endif
   1600   1.48    itojun 			af = (data_addr.su_family == AF_INET) ? 1 : 2;
   1601  1.112    itojun 			tmp = data_addr;
   1602  1.113    itojun #ifdef INET6
   1603  1.112    itojun 			if (tmp.su_family == AF_INET6)
   1604  1.112    itojun 				tmp.si_su.su_sin6.sin6_scope_id = 0;
   1605  1.113    itojun #endif
   1606  1.112    itojun 			if (getnameinfo((struct sockaddr *)&tmp.si_su,
   1607  1.112    itojun 			    tmp.su_len, hname, sizeof(hname), sname,
   1608  1.112    itojun 			    sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) {
   1609   1.48    itojun 				result = ERROR;
   1610   1.48    itojun 			} else {
   1611  1.112    itojun 				result = command("EPRT |%d|%s|%s|", af, hname,
   1612  1.112    itojun 				    sname);
   1613   1.85     lukem 				if (!connected)
   1614   1.85     lukem 					return (1);
   1615   1.74     lukem 				if (result != COMPLETE) {
   1616   1.74     lukem 					epsv4bad = 1;
   1617  1.135  christos 					DPRINTF("disabling epsv4 for this "
   1618  1.135  christos 					    "connection\n");
   1619   1.74     lukem 				}
   1620   1.48    itojun 			}
   1621   1.48    itojun 			break;
   1622   1.48    itojun 		default:
   1623   1.48    itojun 			result = COMPLETE + 1;
   1624   1.48    itojun 			break;
   1625   1.48    itojun 		}
   1626   1.48    itojun 		if (result == COMPLETE)
   1627   1.48    itojun 			goto skip_port;
   1628   1.48    itojun 
   1629   1.48    itojun 		switch (data_addr.su_family) {
   1630   1.48    itojun 		case AF_INET:
   1631  1.104     lukem 			a = (char *)&data_addr.si_su.su_sin.sin_addr;
   1632   1.48    itojun 			p = (char *)&data_addr.su_port;
   1633   1.48    itojun 			result = command("PORT %d,%d,%d,%d,%d,%d",
   1634   1.48    itojun 				 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]),
   1635   1.48    itojun 				 UC(p[0]), UC(p[1]));
   1636   1.48    itojun 			break;
   1637   1.58  christos #ifdef INET6
   1638   1.48    itojun 		case AF_INET6:
   1639  1.104     lukem 			a = (char *)&data_addr.si_su.su_sin6.sin6_addr;
   1640   1.48    itojun 			p = (char *)&data_addr.su_port;
   1641   1.48    itojun 			result = command(
   1642   1.85     lukem 	"LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
   1643   1.48    itojun 				 6, 16,
   1644   1.48    itojun 				 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]),
   1645   1.48    itojun 				 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
   1646   1.48    itojun 				 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
   1647   1.48    itojun 				 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
   1648   1.48    itojun 				 2, UC(p[0]), UC(p[1]));
   1649   1.48    itojun 			break;
   1650   1.58  christos #endif
   1651   1.48    itojun 		default:
   1652   1.48    itojun 			result = COMPLETE + 1; /* xxx */
   1653   1.48    itojun 		}
   1654   1.85     lukem 		if (!connected)
   1655   1.85     lukem 			return (1);
   1656   1.48    itojun 	skip_port:
   1657  1.128     lukem 
   1658    1.1       cgd 		if (result == ERROR && sendport == -1) {
   1659    1.1       cgd 			sendport = 0;
   1660    1.1       cgd 			tmpno = 1;
   1661    1.1       cgd 			goto noport;
   1662    1.1       cgd 		}
   1663    1.1       cgd 		return (result != COMPLETE);
   1664    1.1       cgd 	}
   1665    1.1       cgd 	if (tmpno)
   1666    1.1       cgd 		sendport = 1;
   1667   1.92     lukem #ifdef IPTOS_THROUGHPUT
   1668   1.48    itojun 	if (data_addr.su_family == AF_INET) {
   1669   1.48    itojun 		on = IPTOS_THROUGHPUT;
   1670  1.130     lukem 		if (setsockopt(data, IPPROTO_IP, IP_TOS,
   1671  1.131     lukem 				(void *)&on, sizeof(on)) == -1)
   1672  1.135  christos 			DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
   1673   1.48    itojun 	}
   1674   1.92     lukem #endif
   1675    1.1       cgd 	return (0);
   1676  1.102     lukem  bad:
   1677  1.127     lukem 	(void)close(data);
   1678  1.127     lukem 	data = -1;
   1679    1.1       cgd 	if (tmpno)
   1680    1.1       cgd 		sendport = 1;
   1681    1.1       cgd 	return (1);
   1682    1.1       cgd }
   1683    1.1       cgd 
   1684    1.1       cgd FILE *
   1685   1.95     lukem dataconn(const char *lmode)
   1686    1.1       cgd {
   1687  1.127     lukem 	struct sockinet	from;
   1688  1.132     lukem 	int		s, flags, rv, timeout;
   1689  1.127     lukem 	struct timeval	endtime, now, td;
   1690  1.127     lukem 	struct pollfd	pfd[1];
   1691  1.132     lukem 	socklen_t	fromlen;
   1692    1.8       cgd 
   1693  1.127     lukem 	if (passivemode)	/* passive data connection */
   1694    1.8       cgd 		return (fdopen(data, lmode));
   1695    1.1       cgd 
   1696  1.127     lukem 				/* active mode data connection */
   1697  1.127     lukem 
   1698  1.127     lukem 	if ((flags = fcntl(data, F_GETFL, 0)) == -1)
   1699  1.127     lukem 		goto dataconn_failed;		/* get current socket flags  */
   1700  1.127     lukem 	if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1)
   1701  1.127     lukem 		goto dataconn_failed;		/* set non-blocking connect */
   1702  1.127     lukem 
   1703  1.127     lukem 		/* NOTE: we now must restore socket flags on successful exit */
   1704  1.127     lukem 
   1705  1.127     lukem 				/* limit time waiting on listening socket */
   1706  1.127     lukem 	pfd[0].fd = data;
   1707  1.127     lukem 	pfd[0].events = POLLIN;
   1708  1.127     lukem 	(void)gettimeofday(&endtime, NULL);	/* determine end time */
   1709  1.127     lukem 	endtime.tv_sec += (quit_time > 0) ? quit_time: 60;
   1710  1.127     lukem 						/* without -q, default to 60s */
   1711  1.127     lukem 	do {
   1712  1.127     lukem 		(void)gettimeofday(&now, NULL);
   1713  1.127     lukem 		timersub(&endtime, &now, &td);
   1714  1.127     lukem 		timeout = td.tv_sec * 1000 + td.tv_usec/1000;
   1715  1.127     lukem 		if (timeout < 0)
   1716  1.127     lukem 			timeout = 0;
   1717  1.136  christos 		rv = ftp_poll(pfd, 1, timeout);
   1718  1.127     lukem 	} while (rv == -1 && errno == EINTR);	/* loop until poll ! EINTR */
   1719  1.127     lukem 	if (rv == -1) {
   1720  1.127     lukem 		warn("poll waiting before accept");
   1721  1.127     lukem 		goto dataconn_failed;
   1722  1.127     lukem 	}
   1723  1.127     lukem 	if (rv == 0) {
   1724  1.129     lukem 		warn("poll timeout waiting before accept");
   1725  1.127     lukem 		goto dataconn_failed;
   1726  1.127     lukem 	}
   1727  1.127     lukem 
   1728  1.127     lukem 				/* (non-blocking) accept the connection */
   1729  1.127     lukem 	fromlen = myctladdr.su_len;
   1730  1.127     lukem 	do {
   1731  1.127     lukem 		s = accept(data, (struct sockaddr *) &from.si_su, &fromlen);
   1732  1.127     lukem 	} while (s == -1 && errno == EINTR);	/* loop until accept ! EINTR */
   1733  1.127     lukem 	if (s == -1) {
   1734    1.6       cgd 		warn("accept");
   1735  1.127     lukem 		goto dataconn_failed;
   1736    1.1       cgd 	}
   1737  1.127     lukem 
   1738   1.23     lukem 	(void)close(data);
   1739    1.1       cgd 	data = s;
   1740  1.127     lukem 	if (fcntl(data, F_SETFL, flags) == -1)	/* restore socket flags */
   1741  1.127     lukem 		goto dataconn_failed;
   1742  1.127     lukem 
   1743   1.92     lukem #ifdef IPTOS_THROUGHPUT
   1744   1.48    itojun 	if (from.su_family == AF_INET) {
   1745   1.48    itojun 		int tos = IPTOS_THROUGHPUT;
   1746  1.130     lukem 		if (setsockopt(s, IPPROTO_IP, IP_TOS,
   1747  1.131     lukem 				(void *)&tos, sizeof(tos)) == -1) {
   1748  1.135  christos 			DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT");
   1749   1.48    itojun 		}
   1750   1.48    itojun 	}
   1751   1.92     lukem #endif
   1752    1.1       cgd 	return (fdopen(data, lmode));
   1753  1.128     lukem 
   1754  1.127     lukem  dataconn_failed:
   1755  1.127     lukem 	(void)close(data);
   1756  1.127     lukem 	data = -1;
   1757  1.127     lukem 	return (NULL);
   1758   1.14     lukem }
   1759   1.14     lukem 
   1760   1.14     lukem void
   1761   1.95     lukem psabort(int notused)
   1762    1.1       cgd {
   1763   1.81     lukem 	int oerrno = errno;
   1764    1.1       cgd 
   1765  1.126     lukem 	sigint_raised = 1;
   1766   1.22     lukem 	alarmtimer(0);
   1767    1.1       cgd 	abrtflag++;
   1768   1.81     lukem 	errno = oerrno;
   1769    1.1       cgd }
   1770    1.1       cgd 
   1771    1.6       cgd void
   1772   1.95     lukem pswitch(int flag)
   1773    1.1       cgd {
   1774   1.90     lukem 	sigfunc oldintr;
   1775    1.1       cgd 	static struct comvars {
   1776    1.1       cgd 		int connect;
   1777    1.1       cgd 		char name[MAXHOSTNAMELEN];
   1778  1.104     lukem 		struct sockinet mctl;
   1779  1.104     lukem 		struct sockinet hctl;
   1780    1.1       cgd 		FILE *in;
   1781    1.1       cgd 		FILE *out;
   1782    1.1       cgd 		int tpe;
   1783    1.1       cgd 		int curtpe;
   1784    1.1       cgd 		int cpnd;
   1785    1.1       cgd 		int sunqe;
   1786    1.1       cgd 		int runqe;
   1787    1.1       cgd 		int mcse;
   1788    1.1       cgd 		int ntflg;
   1789    1.1       cgd 		char nti[17];
   1790    1.1       cgd 		char nto[17];
   1791    1.1       cgd 		int mapflg;
   1792    1.1       cgd 		char mi[MAXPATHLEN];
   1793    1.1       cgd 		char mo[MAXPATHLEN];
   1794    1.1       cgd 	} proxstruct, tmpstruct;
   1795    1.1       cgd 	struct comvars *ip, *op;
   1796    1.1       cgd 
   1797    1.1       cgd 	abrtflag = 0;
   1798   1.67     lukem 	oldintr = xsignal(SIGINT, psabort);
   1799    1.1       cgd 	if (flag) {
   1800    1.1       cgd 		if (proxy)
   1801    1.1       cgd 			return;
   1802    1.1       cgd 		ip = &tmpstruct;
   1803    1.1       cgd 		op = &proxstruct;
   1804    1.1       cgd 		proxy++;
   1805    1.1       cgd 	} else {
   1806    1.1       cgd 		if (!proxy)
   1807    1.1       cgd 			return;
   1808    1.1       cgd 		ip = &proxstruct;
   1809    1.1       cgd 		op = &tmpstruct;
   1810    1.1       cgd 		proxy = 0;
   1811    1.1       cgd 	}
   1812    1.1       cgd 	ip->connect = connected;
   1813    1.1       cgd 	connected = op->connect;
   1814   1.68     lukem 	if (hostname)
   1815   1.68     lukem 		(void)strlcpy(ip->name, hostname, sizeof(ip->name));
   1816   1.68     lukem 	else
   1817   1.23     lukem 		ip->name[0] = '\0';
   1818    1.1       cgd 	hostname = op->name;
   1819    1.1       cgd 	ip->hctl = hisctladdr;
   1820    1.1       cgd 	hisctladdr = op->hctl;
   1821    1.1       cgd 	ip->mctl = myctladdr;
   1822    1.1       cgd 	myctladdr = op->mctl;
   1823    1.1       cgd 	ip->in = cin;
   1824    1.1       cgd 	cin = op->in;
   1825    1.1       cgd 	ip->out = cout;
   1826    1.1       cgd 	cout = op->out;
   1827    1.1       cgd 	ip->tpe = type;
   1828    1.1       cgd 	type = op->tpe;
   1829    1.1       cgd 	ip->curtpe = curtype;
   1830    1.1       cgd 	curtype = op->curtpe;
   1831    1.1       cgd 	ip->cpnd = cpend;
   1832    1.1       cgd 	cpend = op->cpnd;
   1833    1.1       cgd 	ip->sunqe = sunique;
   1834    1.1       cgd 	sunique = op->sunqe;
   1835    1.1       cgd 	ip->runqe = runique;
   1836    1.1       cgd 	runique = op->runqe;
   1837    1.1       cgd 	ip->mcse = mcase;
   1838    1.1       cgd 	mcase = op->mcse;
   1839    1.1       cgd 	ip->ntflg = ntflag;
   1840    1.1       cgd 	ntflag = op->ntflg;
   1841   1.68     lukem 	(void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
   1842   1.68     lukem 	(void)strlcpy(ntin, op->nti, sizeof(ntin));
   1843   1.68     lukem 	(void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
   1844   1.68     lukem 	(void)strlcpy(ntout, op->nto, sizeof(ntout));
   1845    1.1       cgd 	ip->mapflg = mapflag;
   1846    1.1       cgd 	mapflag = op->mapflg;
   1847   1.68     lukem 	(void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
   1848   1.68     lukem 	(void)strlcpy(mapin, op->mi, sizeof(mapin));
   1849   1.68     lukem 	(void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
   1850   1.68     lukem 	(void)strlcpy(mapout, op->mo, sizeof(mapout));
   1851   1.67     lukem 	(void)xsignal(SIGINT, oldintr);
   1852    1.1       cgd 	if (abrtflag) {
   1853    1.1       cgd 		abrtflag = 0;
   1854    1.1       cgd 		(*oldintr)(SIGINT);
   1855    1.1       cgd 	}
   1856    1.1       cgd }
   1857    1.1       cgd 
   1858    1.1       cgd void
   1859   1.95     lukem abortpt(int notused)
   1860    1.1       cgd {
   1861    1.6       cgd 
   1862  1.126     lukem 	sigint_raised = 1;
   1863   1.22     lukem 	alarmtimer(0);
   1864   1.84     lukem 	if (fromatty)
   1865   1.84     lukem 		write(fileno(ttyout), "\n", 1);
   1866    1.1       cgd 	ptabflg++;
   1867    1.1       cgd 	mflag = 0;
   1868    1.1       cgd 	abrtflag = 0;
   1869   1.81     lukem 	siglongjmp(ptabort, 1);
   1870    1.1       cgd }
   1871    1.1       cgd 
   1872    1.6       cgd void
   1873   1.95     lukem proxtrans(const char *cmd, const char *local, const char *remote)
   1874    1.1       cgd {
   1875   1.90     lukem 	sigfunc oldintr;
   1876   1.26     lukem 	int prox_type, nfnd;
   1877   1.26     lukem 	volatile int secndflag;
   1878    1.1       cgd 	char *cmd2;
   1879    1.1       cgd 
   1880   1.35     lukem #ifdef __GNUC__			/* to shut up gcc warnings */
   1881   1.26     lukem 	(void)&oldintr;
   1882   1.26     lukem 	(void)&cmd2;
   1883   1.26     lukem #endif
   1884   1.26     lukem 
   1885   1.26     lukem 	oldintr = NULL;
   1886   1.26     lukem 	secndflag = 0;
   1887    1.1       cgd 	if (strcmp(cmd, "RETR"))
   1888    1.1       cgd 		cmd2 = "RETR";
   1889    1.1       cgd 	else
   1890    1.1       cgd 		cmd2 = runique ? "STOU" : "STOR";
   1891    1.1       cgd 	if ((prox_type = type) == 0) {
   1892    1.1       cgd 		if (unix_server && unix_proxy)
   1893    1.1       cgd 			prox_type = TYPE_I;
   1894    1.1       cgd 		else
   1895    1.1       cgd 			prox_type = TYPE_A;
   1896    1.1       cgd 	}
   1897    1.1       cgd 	if (curtype != prox_type)
   1898    1.1       cgd 		changetype(prox_type, 1);
   1899    1.1       cgd 	if (command("PASV") != COMPLETE) {
   1900   1.35     lukem 		fputs("proxy server does not support third party transfers.\n",
   1901   1.35     lukem 		    ttyout);
   1902    1.1       cgd 		return;
   1903    1.1       cgd 	}
   1904    1.1       cgd 	pswitch(0);
   1905    1.1       cgd 	if (!connected) {
   1906   1.35     lukem 		fputs("No primary connection.\n", ttyout);
   1907    1.1       cgd 		pswitch(1);
   1908    1.1       cgd 		code = -1;
   1909    1.1       cgd 		return;
   1910    1.1       cgd 	}
   1911    1.1       cgd 	if (curtype != prox_type)
   1912    1.1       cgd 		changetype(prox_type, 1);
   1913    1.1       cgd 	if (command("PORT %s", pasv) != COMPLETE) {
   1914    1.1       cgd 		pswitch(1);
   1915    1.1       cgd 		return;
   1916    1.1       cgd 	}
   1917   1.81     lukem 	if (sigsetjmp(ptabort, 1))
   1918    1.1       cgd 		goto abort;
   1919   1.67     lukem 	oldintr = xsignal(SIGINT, abortpt);
   1920   1.41     lukem 	if ((restart_point &&
   1921  1.107     lukem 	    (command("REST " LLF, (LLT) restart_point) != CONTINUE))
   1922  1.103     lukem 	    || (command("%s %s", cmd, remote) != PRELIM)) {
   1923   1.67     lukem 		(void)xsignal(SIGINT, oldintr);
   1924    1.1       cgd 		pswitch(1);
   1925    1.1       cgd 		return;
   1926    1.1       cgd 	}
   1927    1.1       cgd 	sleep(2);
   1928    1.1       cgd 	pswitch(1);
   1929    1.1       cgd 	secndflag++;
   1930   1.41     lukem 	if ((restart_point &&
   1931  1.107     lukem 	    (command("REST " LLF, (LLT) restart_point) != CONTINUE))
   1932  1.103     lukem 	    || (command("%s %s", cmd2, local) != PRELIM))
   1933    1.1       cgd 		goto abort;
   1934    1.1       cgd 	ptflag++;
   1935   1.23     lukem 	(void)getreply(0);
   1936    1.1       cgd 	pswitch(0);
   1937   1.23     lukem 	(void)getreply(0);
   1938   1.67     lukem 	(void)xsignal(SIGINT, oldintr);
   1939    1.1       cgd 	pswitch(1);
   1940    1.1       cgd 	ptflag = 0;
   1941   1.35     lukem 	fprintf(ttyout, "local: %s remote: %s\n", local, remote);
   1942    1.1       cgd 	return;
   1943  1.102     lukem  abort:
   1944   1.82     lukem 	if (sigsetjmp(xferabort, 1)) {
   1945   1.82     lukem 		(void)xsignal(SIGINT, oldintr);
   1946   1.82     lukem 		return;
   1947   1.82     lukem 	}
   1948   1.82     lukem 	(void)xsignal(SIGINT, abort_squared);
   1949    1.1       cgd 	ptflag = 0;
   1950    1.1       cgd 	if (strcmp(cmd, "RETR") && !proxy)
   1951    1.1       cgd 		pswitch(1);
   1952    1.1       cgd 	else if (!strcmp(cmd, "RETR") && proxy)
   1953    1.1       cgd 		pswitch(0);
   1954    1.1       cgd 	if (!cpend && !secndflag) {  /* only here if cmd = "STOR" (proxy=1) */
   1955    1.1       cgd 		if (command("%s %s", cmd2, local) != PRELIM) {
   1956    1.1       cgd 			pswitch(0);
   1957    1.1       cgd 			if (cpend)
   1958   1.31     lukem 				abort_remote(NULL);
   1959    1.1       cgd 		}
   1960    1.1       cgd 		pswitch(1);
   1961    1.1       cgd 		if (ptabflg)
   1962    1.1       cgd 			code = -1;
   1963   1.67     lukem 		(void)xsignal(SIGINT, oldintr);
   1964    1.1       cgd 		return;
   1965    1.1       cgd 	}
   1966    1.1       cgd 	if (cpend)
   1967   1.31     lukem 		abort_remote(NULL);
   1968    1.1       cgd 	pswitch(!proxy);
   1969    1.1       cgd 	if (!cpend && !secndflag) {  /* only if cmd = "RETR" (proxy=1) */
   1970    1.1       cgd 		if (command("%s %s", cmd2, local) != PRELIM) {
   1971    1.1       cgd 			pswitch(0);
   1972    1.1       cgd 			if (cpend)
   1973   1.31     lukem 				abort_remote(NULL);
   1974    1.1       cgd 			pswitch(1);
   1975    1.1       cgd 			if (ptabflg)
   1976    1.1       cgd 				code = -1;
   1977   1.67     lukem 			(void)xsignal(SIGINT, oldintr);
   1978    1.1       cgd 			return;
   1979    1.1       cgd 		}
   1980    1.1       cgd 	}
   1981    1.1       cgd 	if (cpend)
   1982   1.31     lukem 		abort_remote(NULL);
   1983    1.1       cgd 	pswitch(!proxy);
   1984    1.1       cgd 	if (cpend) {
   1985   1.45  christos 		if ((nfnd = empty(cin, NULL, 10)) <= 0) {
   1986   1.85     lukem 			if (nfnd < 0)
   1987    1.6       cgd 				warn("abort");
   1988    1.1       cgd 			if (ptabflg)
   1989    1.1       cgd 				code = -1;
   1990   1.85     lukem 			lostpeer(0);
   1991    1.1       cgd 		}
   1992   1.23     lukem 		(void)getreply(0);
   1993   1.23     lukem 		(void)getreply(0);
   1994    1.1       cgd 	}
   1995    1.1       cgd 	if (proxy)
   1996    1.1       cgd 		pswitch(0);
   1997    1.1       cgd 	pswitch(1);
   1998    1.1       cgd 	if (ptabflg)
   1999    1.1       cgd 		code = -1;
   2000   1.67     lukem 	(void)xsignal(SIGINT, oldintr);
   2001    1.1       cgd }
   2002    1.1       cgd 
   2003    1.6       cgd void
   2004   1.95     lukem reset(int argc, char *argv[])
   2005    1.1       cgd {
   2006    1.1       cgd 	int nfnd = 1;
   2007    1.1       cgd 
   2008   1.85     lukem 	if (argc == 0 && argv != NULL) {
   2009  1.135  christos 		UPRINTF("usage: %s\n", argv[0]);
   2010   1.85     lukem 		code = -1;
   2011   1.85     lukem 		return;
   2012   1.85     lukem 	}
   2013    1.1       cgd 	while (nfnd > 0) {
   2014   1.45  christos 		if ((nfnd = empty(cin, NULL, 0)) < 0) {
   2015    1.6       cgd 			warn("reset");
   2016    1.1       cgd 			code = -1;
   2017   1.85     lukem 			lostpeer(0);
   2018   1.85     lukem 		} else if (nfnd)
   2019   1.23     lukem 			(void)getreply(0);
   2020    1.1       cgd 	}
   2021    1.1       cgd }
   2022    1.1       cgd 
   2023    1.1       cgd char *
   2024   1.95     lukem gunique(const char *local)
   2025    1.1       cgd {
   2026    1.1       cgd 	static char new[MAXPATHLEN];
   2027    1.6       cgd 	char *cp = strrchr(local, '/');
   2028   1.68     lukem 	int d, count=0, len;
   2029    1.1       cgd 	char ext = '1';
   2030    1.1       cgd 
   2031    1.1       cgd 	if (cp)
   2032    1.1       cgd 		*cp = '\0';
   2033   1.28     lukem 	d = access(cp == local ? "/" : cp ? local : ".", W_OK);
   2034    1.1       cgd 	if (cp)
   2035    1.1       cgd 		*cp = '/';
   2036    1.1       cgd 	if (d < 0) {
   2037    1.6       cgd 		warn("local: %s", local);
   2038   1.31     lukem 		return (NULL);
   2039    1.1       cgd 	}
   2040   1.68     lukem 	len = strlcpy(new, local, sizeof(new));
   2041   1.68     lukem 	cp = &new[len];
   2042  1.128     lukem 	*cp++ = '.';
   2043    1.1       cgd 	while (!d) {
   2044    1.1       cgd 		if (++count == 100) {
   2045   1.35     lukem 			fputs("runique: can't find unique file name.\n",
   2046   1.35     lukem 			    ttyout);
   2047   1.31     lukem 			return (NULL);
   2048    1.1       cgd 		}
   2049    1.1       cgd 		*cp++ = ext;
   2050    1.1       cgd 		*cp = '\0';
   2051    1.1       cgd 		if (ext == '9')
   2052    1.1       cgd 			ext = '0';
   2053    1.1       cgd 		else
   2054    1.1       cgd 			ext++;
   2055   1.28     lukem 		if ((d = access(new, F_OK)) < 0)
   2056    1.1       cgd 			break;
   2057    1.1       cgd 		if (ext != '0')
   2058    1.1       cgd 			cp--;
   2059    1.1       cgd 		else if (*(cp - 2) == '.')
   2060    1.1       cgd 			*(cp - 1) = '1';
   2061    1.1       cgd 		else {
   2062    1.1       cgd 			*(cp - 2) = *(cp - 2) + 1;
   2063    1.1       cgd 			cp--;
   2064    1.1       cgd 		}
   2065    1.1       cgd 	}
   2066    1.6       cgd 	return (new);
   2067   1.82     lukem }
   2068   1.82     lukem 
   2069   1.82     lukem /*
   2070   1.82     lukem  * abort_squared --
   2071   1.82     lukem  *	aborts abort_remote(). lostpeer() is called because if the user is
   2072   1.82     lukem  *	too impatient to wait or there's another problem then ftp really
   2073   1.82     lukem  *	needs to get back to a known state.
   2074   1.82     lukem  */
   2075   1.82     lukem void
   2076   1.95     lukem abort_squared(int dummy)
   2077   1.82     lukem {
   2078   1.82     lukem 	char msgbuf[100];
   2079  1.132     lukem 	size_t len;
   2080   1.82     lukem 
   2081  1.126     lukem 	sigint_raised = 1;
   2082   1.82     lukem 	alarmtimer(0);
   2083   1.82     lukem 	len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n",
   2084   1.82     lukem 	    sizeof(msgbuf));
   2085   1.82     lukem 	write(fileno(ttyout), msgbuf, len);
   2086   1.85     lukem 	lostpeer(0);
   2087   1.82     lukem 	siglongjmp(xferabort, 1);
   2088    1.1       cgd }
   2089    1.1       cgd 
   2090    1.6       cgd void
   2091   1.95     lukem abort_remote(FILE *din)
   2092    1.1       cgd {
   2093   1.65     lukem 	char buf[BUFSIZ];
   2094    1.1       cgd 	int nfnd;
   2095    1.1       cgd 
   2096   1.23     lukem 	if (cout == NULL) {
   2097   1.23     lukem 		warnx("Lost control connection for abort.");
   2098   1.23     lukem 		if (ptabflg)
   2099   1.23     lukem 			code = -1;
   2100   1.85     lukem 		lostpeer(0);
   2101   1.23     lukem 		return;
   2102   1.23     lukem 	}
   2103    1.1       cgd 	/*
   2104    1.1       cgd 	 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark
   2105    1.1       cgd 	 * after urgent byte rather than before as is protocol now
   2106    1.1       cgd 	 */
   2107   1.63     lukem 	buf[0] = IAC;
   2108   1.63     lukem 	buf[1] = IP;
   2109   1.63     lukem 	buf[2] = IAC;
   2110    1.1       cgd 	if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
   2111    1.6       cgd 		warn("abort");
   2112   1.15     lukem 	fprintf(cout, "%cABOR\r\n", DM);
   2113   1.23     lukem 	(void)fflush(cout);
   2114   1.45  christos 	if ((nfnd = empty(cin, din, 10)) <= 0) {
   2115   1.85     lukem 		if (nfnd < 0)
   2116    1.6       cgd 			warn("abort");
   2117    1.1       cgd 		if (ptabflg)
   2118    1.1       cgd 			code = -1;
   2119   1.85     lukem 		lostpeer(0);
   2120    1.1       cgd 	}
   2121   1.45  christos 	if (din && (nfnd & 2)) {
   2122    1.1       cgd 		while (read(fileno(din), buf, BUFSIZ) > 0)
   2123   1.45  christos 			continue;
   2124    1.1       cgd 	}
   2125    1.1       cgd 	if (getreply(0) == ERROR && code == 552) {
   2126    1.1       cgd 		/* 552 needed for nic style abort */
   2127   1.23     lukem 		(void)getreply(0);
   2128    1.1       cgd 	}
   2129   1.23     lukem 	(void)getreply(0);
   2130   1.96    itojun }
   2131   1.96    itojun 
   2132   1.96    itojun void
   2133   1.96    itojun ai_unmapped(struct addrinfo *ai)
   2134   1.96    itojun {
   2135   1.98     lukem #ifdef INET6
   2136   1.96    itojun 	struct sockaddr_in6 *sin6;
   2137   1.96    itojun 	struct sockaddr_in sin;
   2138  1.132     lukem 	socklen_t len;
   2139   1.96    itojun 
   2140   1.96    itojun 	if (ai->ai_family != AF_INET6)
   2141   1.96    itojun 		return;
   2142   1.96    itojun 	if (ai->ai_addrlen != sizeof(struct sockaddr_in6) ||
   2143   1.96    itojun 	    sizeof(sin) > ai->ai_addrlen)
   2144   1.96    itojun 		return;
   2145   1.96    itojun 	sin6 = (struct sockaddr_in6 *)ai->ai_addr;
   2146   1.96    itojun 	if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr))
   2147   1.96    itojun 		return;
   2148   1.96    itojun 
   2149   1.96    itojun 	memset(&sin, 0, sizeof(sin));
   2150   1.96    itojun 	sin.sin_family = AF_INET;
   2151   1.99     lukem 	len = sizeof(struct sockaddr_in);
   2152   1.96    itojun 	memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
   2153   1.96    itojun 	    sizeof(sin.sin_addr));
   2154   1.96    itojun 	sin.sin_port = sin6->sin6_port;
   2155   1.96    itojun 
   2156   1.96    itojun 	ai->ai_family = AF_INET;
   2157  1.107     lukem #if HAVE_SOCKADDR_SA_LEN
   2158   1.99     lukem 	sin.sin_len = len;
   2159   1.99     lukem #endif
   2160   1.99     lukem 	memcpy(ai->ai_addr, &sin, len);
   2161   1.99     lukem 	ai->ai_addrlen = len;
   2162   1.98     lukem #endif
   2163    1.1       cgd }
   2164  1.135  christos 
   2165  1.135  christos #ifdef NO_USAGE
   2166  1.135  christos void
   2167  1.135  christos xusage(void)
   2168  1.135  christos {
   2169  1.135  christos 	fputs("Usage error\n", ttyout);
   2170  1.135  christos }
   2171  1.135  christos #endif
   2172