/usr/src/usr.bin/ftp/ftp.c

Bug Summary

File:	src/usr.bin/ftp/ftp.c
Warning:	line 927, column 24 Null pointer passed as 1st argument to string comparison function
Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.4 -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name ftp.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -ffp-contract=on -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.bin/ftp/obj -resource-dir /usr/local/llvm16/lib/clang/16 -internal-isystem /usr/local/llvm16/lib/clang/16/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.bin/ftp/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fcf-protection=branch -fno-jump-tables -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/scan/2024-01-11-140451-98009-1 -x c /usr/src/usr.bin/ftp/ftp.c
1/*	$OpenBSD: ftp.c,v 1.109 2023/03/08 04:43:11 guenther Exp $	*/
2/*	$NetBSD: ftp.c,v 1.27 1997/08/18 10:20:23 lukem Exp $	*/

4/*
* Copyright (C) 1997 and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

33/*
* Copyright (c) 1985, 1989, 1993, 1994
*	The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

62#include <sys/types.h>
63#include <sys/stat.h>
64#include <sys/socket.h>

66#include <netinet/in.h>
67#include <netinet/ip.h>
68#include <arpa/inet.h>
69#include <arpa/ftp.h>
70#include <arpa/telnet.h>

72#include <ctype.h>
73#include <err.h>
74#include <errno(*__errno()).h>
75#include <fcntl.h>
76#include <netdb.h>
77#include <poll.h>
78#include <stdarg.h>
79#include <stdio.h>
80#include <stdlib.h>
81#include <string.h>
82#include <unistd.h>

84#include "ftp_var.h"

86union sockaddr_union {
struct sockaddr		sa;
struct sockaddr_in	sin;
struct sockaddr_in6	sin6;
90};

92union sockaddr_union myctladdr, hisctladdr, data_addr;

94int	data = -1;
95int	abrtflag = 0;
96jmp_buf	ptabort;
97int	ptabflg;
98int	ptflag = 0;
99off_t	restart_point = 0;


102FILE	*cin, *cout;

104char *
105hookup(char *host, char *port)
106{
int s, tos, error;
static char hostnamebuf[HOST_NAME_MAX255+1];
struct addrinfo hints, *res, *res0;
110#ifndef SMALL
struct addrinfo *ares;
112#endif
char hbuf[NI_MAXHOST256];
char *cause = "unknown";
socklen_t namelen;

epsv4bad = 0;

memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME2;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM1;
hints.ai_protocol = 0;
error = getaddrinfo(host, port, &hints, &res0);
if (error == EAI_SERVICE-8) {
/*
 * If the services file is corrupt/missing, fall back
 * on our hard-coded defines.
 */
char pbuf[NI_MAXSERV32];

pbuf[0] = '\0';
if (strcmp(port, "ftp") == 0)
	snprintf(pbuf, sizeof(pbuf), "%d", FTP_PORT21);
else if (strcmp(port, "ftpgate") == 0)
	snprintf(pbuf, sizeof(pbuf), "%d", GATE_PORT21);
else if (strcmp(port, "http") == 0)
	snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT80);
140#ifndef SMALL
else if (strcmp(port, "https") == 0)
	snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT443);
143#endif /* !SMALL */
if (pbuf[0])
	error = getaddrinfo(host, pbuf, &hints, &res0);
}
if (error) {
if (error == EAI_SERVICE-8)
	warnx("%s: bad port number `%s'", host, port);
else
	warnx("%s: %s", host, gai_strerror(error));
code = -1;
return (0);
}

if (res0->ai_canonname)
strlcpy(hostnamebuf, res0->ai_canonname, sizeof(hostnamebuf));
else
strlcpy(hostnamebuf, host, sizeof(hostnamebuf));
hostname = hostnamebuf;

162#ifndef SMALL
if (srcaddr) {
struct addrinfo ahints;

memset(&ahints, 0, sizeof(ahints));
ahints.ai_family = family;
ahints.ai_socktype = SOCK_STREAM1;
ahints.ai_flags |= AI_NUMERICHOST4;
ahints.ai_protocol = 0;

error = getaddrinfo(srcaddr, NULL((void *)0), &ahints, &ares);
if (error) {
	warnx("%s: %s", srcaddr, gai_strerror(error));
	code = -1;
	return (0);
}
}
179#endif /* !SMALL */

s = -1;
for (res = res0; res; res = res->ai_next) {
if (res0->ai_next)	/* if we have multiple possibilities */
{
	if (getnameinfo(res->ai_addr, res->ai_addrlen,
	    hbuf, sizeof(hbuf), NULL((void *)0), 0, NI_NUMERICHOST1) != 0)
		strlcpy(hbuf, "unknown", sizeof(hbuf));
	if (verbose)
		fprintf(ttyout, "Trying %s...\n", hbuf);
}
s = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (s == -1) {
	cause = "socket";
	continue;
}
196#ifndef SMALL
if (srcaddr) {
	if (ares->ai_family != res->ai_family) {
		close(s);
		s = -1;
		errno(*__errno()) = EINVAL22;
		cause = "bind";
		continue;
	}
	if (bind(s, ares->ai_addr, ares->ai_addrlen) == -1) {
		cause = "bind";
		error = errno(*__errno());
		close(s);
		errno(*__errno()) = error;
		s = -1;
		continue;
	}
}
214#endif /* !SMALL */
error = timed_connect(s, res->ai_addr, res->ai_addrlen,
    connect_timeout);
if (error != 0) {
	/* this "if" clause is to prevent print warning twice */
	if (verbose && res->ai_next) {
		if (getnameinfo(res->ai_addr, res->ai_addrlen,
		    hbuf, sizeof(hbuf), NULL((void *)0), 0,
		    NI_NUMERICHOST1) != 0)
			strlcpy(hbuf, "(unknown)",
			    sizeof(hbuf));
		warn("connect to address %s", hbuf);
	}
	cause = "connect";
	error = errno(*__errno());
	close(s);
	errno(*__errno()) = error;
	s = -1;
	continue;
}

/* finally we got one */
break;
}
if (s == -1) {
warn("%s", cause);
code = -1;
freeaddrinfo(res0);
return 0;
}
memcpy(&hisctladdr, res->ai_addr, res->ai_addrlen);
namelen = res->ai_addrlen;
freeaddrinfo(res0);
res0 = res = NULL((void *)0);
248#ifndef SMALL
if (srcaddr) {
freeaddrinfo(ares);
ares = NULL((void *)0);
}
253#endif /* !SMALL */
if (getsockname(s, &myctladdr.sa, &namelen) == -1) {
warn("getsockname");
code = -1;
goto bad;
}
if (hisctladdr.sa.sa_family == AF_INET2) {
tos = IPTOS_LOWDELAY0x10;
if (setsockopt(s, IPPROTO_IP0, IP_TOS3, (char *)&tos, sizeof(int)) == -1)
	warn("setsockopt TOS (ignored)");
}
cin = fdopen(s, "r");
cout = fdopen(s, "w");
if (cin == NULL((void *)0) || cout == NULL((void *)0)) {
warnx("fdopen failed.");
if (cin)
	(void)fclose(cin);
if (cout)
	(void)fclose(cout);
code = -1;
goto bad;
}
if (verbose)
fprintf(ttyout, "Connected to %s.\n", hostname);
if (getreply(0) > 2) {	/* read startup message from server */
if (cin)
	(void)fclose(cin);
if (cout)
	(void)fclose(cout);
code = -1;
goto bad;
}
{
int ret, on = 1;

ret = setsockopt(s, SOL_SOCKET0xffff, SO_OOBINLINE0x0100, (char *)&on, sizeof(on));
289#ifndef SMALL
if (ret == -1 && debug)
warn("setsockopt");
292#endif /* !SMALL */
}

return (hostname);
296bad:
(void)close(s);
return (NULL((void *)0));
299}

301void
302cmdabort(int signo)
303{
int save_errno = errno(*__errno());

alarmtimer(0);
(void) write(fileno(ttyout)(!__isthreaded ? ((ttyout)->_file) : (fileno)(ttyout)), "\n\r", 2);
abrtflag++;

errno(*__errno()) = save_errno;
if (ptflag)
longjmp(ptabort, 1);
313}

315int
316command(const char *fmt, ...)
317{
va_list ap;
int r;
sig_t oldintr;

abrtflag = 0;
323#ifndef SMALL
if (debug) {
fputs("---> ", ttyout);
va_start(ap, fmt)__builtin_va_start((ap), fmt);
if (strncmp("PASS ", fmt, 5) == 0)
	fputs("PASS XXXX", ttyout);
else if (strncmp("ACCT ", fmt, 5) == 0)
	fputs("ACCT XXXX", ttyout);
else
	vfprintf(ttyout, fmt, ap);
va_end(ap)__builtin_va_end((ap));
putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
(void)fflush(ttyout);
}
337#endif /* !SMALL */
if (cout == NULL((void *)0)) {
warnx("No control connection for command.");
code = -1;
return (0);
}
oldintr = signal(SIGINT2, cmdabort);
va_start(ap, fmt)__builtin_va_start((ap), fmt);
vfprintf(cout, fmt, ap);
va_end(ap)__builtin_va_end((ap));
fputs("\r\n", cout);
(void)fflush(cout);
cpend = 1;
r = getreply(!strcmp(fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN(void (*)(int))1)
(*oldintr)(SIGINT2);
(void)signal(SIGINT2, oldintr);
return (r);
355}

357int keep_alive_timeout = 60;		/* 0 -> no timeout */

359static int full_noops_sent = 0;
360static time_t last_timestamp = 0;	/* 0 -> no measurement yet */
361static char noop[] = "NOOP\r\n";
362#define NOOP_LENGTH(sizeof noop - 1) (sizeof noop - 1)
363static int current_nop_pos = 0;		/* 0 -> no noop started */

365/* to achieve keep alive, we send noop one byte at a time */
366static void
367send_noop_char(void)
368{
369#ifndef SMALL
if (debug)
fprintf(ttyout, "---> %c\n", noop[current_nop_pos]);
372#endif /* !SMALL */
fputc(noop[current_nop_pos++], cout);
(void)fflush(cout);
if (current_nop_pos >= NOOP_LENGTH(sizeof noop - 1)) {
full_noops_sent++;
current_nop_pos = 0;
}
379}

381static void
382may_reset_noop_timeout(void)
383{
if (keep_alive_timeout != 0)
last_timestamp = time(NULL((void *)0));
386}

388static void
389may_receive_noop_ack(void)
390{
int i;

if (cout == NULL((void *)0)) {
/* Lost connection;  so just pretend we're fine. */
current_nop_pos = full_noops_sent = 0;
return;
}

/* finish sending last incomplete noop */
if (current_nop_pos != 0) {
fputs(&(noop[current_nop_pos]), cout);
402#ifndef SMALL
if (debug)
	fprintf(ttyout, "---> %s\n", &(noop[current_nop_pos]));
405#endif /* !SMALL */
(void)fflush(cout);
current_nop_pos = 0;
full_noops_sent++;
}
/* and get the replies */
for (i = 0; i < full_noops_sent; i++)
(void)getreply(0);

full_noops_sent = 0;
415}

417static void
418may_send_noop_char(void)
419{
if (keep_alive_timeout != 0) {
if (last_timestamp != 0) {
	time_t t = time(NULL((void *)0));

	if (t - last_timestamp >= keep_alive_timeout) {
		last_timestamp = t;
		send_noop_char();
	}
} else {
	last_timestamp = time(NULL((void *)0));
}
}
432}

434char reply_string[BUFSIZ1024];		/* first line of previous reply */

436int
437getreply(int expecteof)
438{
char current_line[BUFSIZ1024];	/* last line of previous reply */
int c, n, lineno;
int dig;
int originalcode = 0, continuation = 0;
sig_t oldintr;
int pflag = 0;
char *cp, *pt = pasv;

memset(current_line, 0, sizeof(current_line));
oldintr = signal(SIGINT2, cmdabort);
for (lineno = 0 ;; lineno++) {
dig = n = code = 0;
cp = current_line;
while ((c = fgetc(cin)) != '\n') {
	if (c == IAC255) {		/* handle telnet commands */
		switch (c = fgetc(cin)) {
		case WILL251:
		case WONT252:
			c = fgetc(cin);
			fprintf(cout, "%c%c%c", IAC255, DONT254, c);
			(void)fflush(cout);
			break;
		case DO253:
		case DONT254:
			c = fgetc(cin);
			fprintf(cout, "%c%c%c", IAC255, WONT252, c);
			(void)fflush(cout);
			break;
		default:
			break;
		}
		continue;
	}
	dig++;
	if (c == EOF(-1)) {
		if (expecteof) {
			(void)signal(SIGINT2, oldintr);
			code = 221;
			return (0);
		}
		lostpeer();
		if (verbose) {
			fputs(
482"421 Service not available, remote server has closed connection.\n", ttyout);
			(void)fflush(ttyout);
		}
		code = 421;
		return (4);
	}
	if (c != '\r' && (verbose > 0 ||
	    ((verbose > -1 && n == '5' && dig > 4) &&
	    (((!n && c < '5') || (n && n < '5')) ||
	    !retry_connect)))) {
		if (proxflag &&
		   (dig == 1 || (dig == 5 && verbose == 0)))
			fprintf(ttyout, "%s:", hostname);
		(void)putc(c, ttyout)(!__isthreaded ? __sputc(c, ttyout) : (putc)(c, ttyout));
	}
	if (dig < 4 && isdigit(c))
		code = code * 10 + (c - '0');
	if (!pflag && (code == 227 || code == 228))
		pflag = 1;
	else if (!pflag && code == 229)
		pflag = 100;
	if (dig > 4 && pflag == 1 && isdigit(c))
		pflag = 2;
	if (pflag == 2) {
		if (c != '\r' && c != ')') {
			if (pt < &pasv[sizeof(pasv) - 1])
				*pt++ = c;
		} else {
			*pt = '\0';
			pflag = 3;
		}
	}
	if (pflag == 100 && c == '(')
		pflag = 2;
	if (dig == 4 && c == '-') {
		if (continuation)
			code = 0;
		continuation++;
	}
	if (n == 0)
		n = c;
	if (cp < &current_line[sizeof(current_line) - 1])
		*cp++ = c;
}
if (verbose > 0 || ((verbose > -1 && n == '5') &&
    (n < '5' || !retry_connect))) {
	(void)putc(c, ttyout)(!__isthreaded ? __sputc(c, ttyout) : (putc)(c, ttyout));
	(void)fflush (ttyout);
}
if (lineno == 0) {
	size_t len = cp - current_line;

	if (len > sizeof(reply_string))
		len = sizeof(reply_string);

	(void)strlcpy(reply_string, current_line, len);
}
if (continuation && code != originalcode) {
	if (originalcode == 0)
		originalcode = code;
	continue;
}
*cp = '\0';
if (n != '1')
	cpend = 0;
(void)signal(SIGINT2, oldintr);
if (code == 421 || originalcode == 421)
	lostpeer();
if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN(void (*)(int))1)
	(*oldintr)(SIGINT2);
return (n - '0');
}
554}

556#ifndef SMALL
557jmp_buf	sendabort;

559void
560abortsend(int signo)
561{
int save_errno = errno(*__errno());
alarmtimer(0);
mflag = 0;
abrtflag = 0;
566#define MSG "\nsend aborted\nwaiting for remote to finish abort.\n"
(void) write(fileno(ttyout)(!__isthreaded ? ((ttyout)->_file) : (fileno)(ttyout)), MSG, strlen(MSG));
568#undef MSG

errno(*__errno()) = save_errno;
longjmp(sendabort, 1);
572}

574void
575sendrequest(const char *cmd, const char *local, const char *remote,
  int printnames)
577{
struct stat st;
int c, d;
FILE * volatile fin, * volatile dout;
int (* volatile closefunc)(FILE *);
volatile sig_t oldinti, oldintr, oldintp;
volatile off_t hashbytes;
char * volatile lmode;
char buf[BUFSIZ1024], *bufp;
int oprogress, serrno;

hashbytes = mark;
direction = "sent";
dout = NULL((void *)0);
bytes = 0;
filesize = -1;
oprogress = progress;
if (verbose && printnames) {
if (local && *local != '-')
	fprintf(ttyout, "local: %s ", local);
if (remote)
	fprintf(ttyout, "remote: %s\n", remote);
}
if (proxy) {
proxtrans(cmd, local, remote);
return;
}
if (curtype != type)
changetype(type, 0);
closefunc = NULL((void *)0);
oldintr = NULL((void *)0);
oldintp = NULL((void *)0);
oldinti = NULL((void *)0);
lmode = "w";
if (setjmp(sendabort)) {
while (cpend) {
	(void)getreply(0);
}
if (data >= 0) {
	(void)close(data);
	data = -1;
}
if (oldintr)
	(void)signal(SIGINT2, oldintr);
if (oldintp)
	(void)signal(SIGPIPE13, oldintp);
if (oldinti)
	(void)signal(SIGINFO29, oldinti);
progress = oprogress;
code = -1;
return;
}
oldintr = signal(SIGINT2, abortsend);
oldinti = signal(SIGINFO29, psummary);
if (strcmp(local, "-") == 0) {
fin = stdin(&__sF[0]);
if (progress == 1)
	progress = 0;
} else if (*local == '|') {
oldintp = signal(SIGPIPE13, SIG_IGN(void (*)(int))1);
fin = popen(local + 1, "r");
if (fin == NULL((void *)0)) {
	warn("%s", local + 1);
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGPIPE13, oldintp);
	(void)signal(SIGINFO29, oldinti);
	code = -1;
	return;
}
if (progress == 1)
	progress = 0;
closefunc = pclose;
} else {
fin = fopen(local, "r");
if (fin == NULL((void *)0)) {
	warn("local: %s", local);
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	code = -1;
	return;
}
closefunc = fclose;
if (fstat(fileno(fin)(!__isthreaded ? ((fin)->_file) : (fileno)(fin)), &st) == -1 ||
    (st.st_mode & S_IFMT0170000) != S_IFREG0100000) {
	fprintf(ttyout, "%s: not a plain file.\n", local);
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	fclose(fin);
	code = -1;
	return;
}
filesize = st.st_size;
}
if (initconn()) {
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
if (oldintp)
	(void)signal(SIGPIPE13, oldintp);
code = -1;
progress = oprogress;
if (closefunc != NULL((void *)0))
	(*closefunc)(fin);
return;
}
if (setjmp(sendabort))
goto abort;

if (restart_point &&
   (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) {
int rc = -1;

switch (curtype) {
case TYPE_A1:
	rc = fseeko(fin, restart_point, SEEK_SET0);
	break;
case TYPE_I3:
	if (lseek(fileno(fin)(!__isthreaded ? ((fin)->_file) : (fileno)(fin)), restart_point, SEEK_SET0) != -1)
		rc = 0;
	break;
}
if (rc == -1) {
	warn("local: %s", local);
	progress = oprogress;
	if (closefunc != NULL((void *)0))
		(*closefunc)(fin);
	return;
}
if (command("REST %lld", (long long) restart_point)
	!= CONTINUE3) {
	progress = oprogress;
	if (closefunc != NULL((void *)0))
		(*closefunc)(fin);
	return;
}
lmode = "r+w";
}
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM1) {
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	progress = oprogress;
	if (oldintp)
		(void)signal(SIGPIPE13, oldintp);
	if (closefunc != NULL((void *)0))
		(*closefunc)(fin);
	return;
}
} else
if (command("%s", cmd) != PRELIM1) {
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	progress = oprogress;
	if (oldintp)
		(void)signal(SIGPIPE13, oldintp);
	if (closefunc != NULL((void *)0))
		(*closefunc)(fin);
	return;
}
dout = dataconn(lmode);
if (dout == NULL((void *)0))
goto abort;
progressmeter(-1, remote);
may_reset_noop_timeout();
oldintp = signal(SIGPIPE13, SIG_IGN(void (*)(int))1);
serrno = 0;
switch (curtype) {

case TYPE_I3:
d = 0;
while ((c = read(fileno(fin)(!__isthreaded ? ((fin)->_file) : (fileno)(fin)), buf, sizeof(buf))) > 0) {
	may_send_noop_char();
	bytes += c;
	for (bufp = buf; c > 0; c -= d, bufp += d)
		if ((d = write(fileno(dout)(!__isthreaded ? ((dout)->_file) : (fileno)(dout)), bufp, (size_t)c))
		    <= 0)
			break;
	if (hash && (!progress || filesize < 0) ) {
		while (bytes >= hashbytes) {
			(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
			hashbytes += mark;
		}
		(void)fflush(ttyout);
	}
}
if (c == -1 || d == -1)
	serrno = errno(*__errno());
if (hash && (!progress || filesize < 0) && bytes > 0) {
	if (bytes < mark)
		(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
	(void)putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
	(void)fflush(ttyout);
}
if (c < 0)
	warnc(serrno, "local: %s", local);
if (d < 0) {
	if (serrno != EPIPE32)
		warnc(serrno, "netout");
	bytes = -1;
}
break;

case TYPE_A1:
while ((c = fgetc(fin)) != EOF(-1)) {
	may_send_noop_char();
	if (c == '\n') {
		while (hash && (!progress || filesize < 0) &&
		    (bytes >= hashbytes)) {
			(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
			(void)fflush(ttyout);
			hashbytes += mark;
		}
		if (ferror(dout)(!__isthreaded ? (((dout)->_flags & 0x0040) != 0) : (ferror
)(dout)))
			break;
		(void)putc('\r', dout)(!__isthreaded ? __sputc('\r', dout) : (putc)('\r', dout));
		bytes++;
	}
	(void)putc(c, dout)(!__isthreaded ? __sputc(c, dout) : (putc)(c, dout));
	bytes++;
}
if (ferror(fin)(!__isthreaded ? (((fin)->_flags & 0x0040) != 0) : (ferror
)(fin)) || ferror(dout)(!__isthreaded ? (((dout)->_flags & 0x0040) != 0) : (ferror
)(dout)))
	serrno = errno(*__errno());
if (hash && (!progress || filesize < 0)) {
	if (bytes < hashbytes)
		(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
	(void)putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
	(void)fflush(ttyout);
}
if (ferror(fin)(!__isthreaded ? (((fin)->_flags & 0x0040) != 0) : (ferror
)(fin)))
	warnc(serrno, "local: %s", local);
if (ferror(dout)(!__isthreaded ? (((dout)->_flags & 0x0040) != 0) : (ferror
)(dout))) {
	if (errno(*__errno()) != EPIPE32)
		warnc(serrno, "netout");
	bytes = -1;
}
break;
}
progressmeter(1, NULL((void *)0));
progress = oprogress;
if (closefunc != NULL((void *)0))
(*closefunc)(fin);
(void)fclose(dout);
(void)getreply(0);
may_receive_noop_ack();
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
if (oldintp)
(void)signal(SIGPIPE13, oldintp);
if (bytes > 0)
ptransfer(0);
return;
827abort:
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
progress = oprogress;
if (oldintp)
(void)signal(SIGPIPE13, oldintp);
if (!cpend) {
code = -1;
return;
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (dout)
(void)fclose(dout);
(void)getreply(0);
code = -1;
if (closefunc != NULL((void *)0) && fin != NULL((void *)0))
(*closefunc)(fin);
if (bytes > 0)
ptransfer(0);
849}
850#endif /* !SMALL */

852jmp_buf	recvabort;

854void
855abortrecv(int signo)
856{

alarmtimer(0);
mflag = 0;
abrtflag = 0;
fputs("\nreceive aborted\nwaiting for remote to finish abort.\n", ttyout);
(void)fflush(ttyout);
longjmp(recvabort, 1);
864}

866void
867recvrequest(const char *cmd, const char * volatile local, const char *remote,
  const char *lmode, int printnames, int ignorespecial)
869{
FILE * volatile fout, * volatile din;
int (* volatile closefunc)(FILE *);
volatile sig_t oldinti, oldintr, oldintp;
int c, d, serrno;
volatile int is_retr, tcrflag, bare_lfs;
static size_t bufsize;
static char *buf;
volatile off_t hashbytes;
struct stat st;
time_t mtime;
int oprogress;
int opreserve;

fout = NULL((void *)0);
din = NULL((void *)0);
oldinti = NULL((void *)0);
hashbytes = mark;
direction = "received";
bytes = 0;
bare_lfs = 0;
filesize = -1;
oprogress = progress;
opreserve = preserve;
is_retr = strcmp(cmd, "RETR") == 0;
if (is_retr0.1
'is_retr' is 1
 && verbose && printnames) {
1
Assuming 'verbose' is not equal to 0→
2
←
Assuming 'printnames' is not equal to 0→
if (local && (ignorespecial || *local != '-'))
3
←
Assuming 'local' is null→
	fprintf(ttyout, "local: %s ", local);
if (remote)
4
←
Assuming 'remote' is null→
	fprintf(ttyout, "remote: %s\n", remote);
}
if (proxy && is_retr) {
5
←
Assuming 'proxy' is 0→
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL((void *)0);
oldintr = NULL((void *)0);
oldintp = NULL((void *)0);
tcrflag = !crflag && is_retr;
6
←
Assuming 'crflag' is not equal to 0→
if (setjmp(recvabort)) {
7
←
Assuming the condition is false→
8
←
Taking false branch→
while (cpend) {
	(void)getreply(0);
}
if (data >= 0) {
	(void)close(data);
	data = -1;
}
if (oldintr)
	(void)signal(SIGINT2, oldintr);
if (oldinti)
	(void)signal(SIGINFO29, oldinti);
progress = oprogress;
preserve = opreserve;
code = -1;
return;
}
oldintr = signal(SIGINT2, abortrecv);
oldinti = signal(SIGINFO29, psummary);
if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
9
←
Assuming 'ignorespecial' is 0→
10
←
Null pointer passed as 1st argument to string comparison function
if (access(local, W_OK0x02) == -1) {
	char *dir;

	if (errno(*__errno()) != ENOENT2 && errno(*__errno()) != EACCES13) {
		warn("local: %s", local);
		(void)signal(SIGINT2, oldintr);
		(void)signal(SIGINFO29, oldinti);
		code = -1;
		return;
	}
	dir = strrchr(local, '/');
	if (dir != NULL((void *)0))
		*dir = 0;
	d = access(dir == local ? "/" : dir ? local : ".", W_OK0x02);
	if (dir != NULL((void *)0))
		*dir = '/';
	if (d == -1) {
		warn("local: %s", local);
		(void)signal(SIGINT2, oldintr);
		(void)signal(SIGINFO29, oldinti);
		code = -1;
		return;
	}
	if (!runique && errno(*__errno()) == EACCES13 &&
	    chmod(local, (S_IRUSR0000400|S_IWUSR0000200)) == -1) {
		warn("local: %s", local);
		(void)signal(SIGINT2, oldintr);
		(void)signal(SIGINFO29, oldinti);
		code = -1;
		return;
	}
	if (runique && errno(*__errno()) == EACCES13 &&
	   (local = gunique(local)) == NULL((void *)0)) {
		(void)signal(SIGINT2, oldintr);
		(void)signal(SIGINFO29, oldinti);
		code = -1;
		return;
	}
} else if (runique && (local = gunique(local)) == NULL((void *)0)) {
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	code = -1;
	return;
}
}
if (!is_retr) {
if (curtype != TYPE_A1)
	changetype(TYPE_A1, 0);
} else {
if (curtype != type)
	changetype(type, 0);
filesize = remotesize(remote, 0);
}
if (initconn()) {
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
code = -1;
return;
}
if (setjmp(recvabort))
goto abort;
if (is_retr && restart_point &&
   command("REST %lld", (long long) restart_point) != CONTINUE3)
return;
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM1) {
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	return;
}
} else {
if (command("%s", cmd) != PRELIM1) {
	(void)signal(SIGINT2, oldintr);
	(void)signal(SIGINFO29, oldinti);
	return;
}
}
din = dataconn("r");
if (din == NULL((void *)0))
goto abort;
if (!ignorespecial && strcmp(local, "-") == 0) {
fout = stdout(&__sF[1]);
preserve = 0;
} else if (!ignorespecial && *local == '|') {
oldintp = signal(SIGPIPE13, SIG_IGN(void (*)(int))1);
fout = popen(local + 1, "w");
if (fout == NULL((void *)0)) {
	warn("%s", local+1);
	goto abort;
}
if (progress == 1)
	progress = 0;
preserve = 0;
closefunc = pclose;
} else {
fout = fopen(local, lmode);
if (fout == NULL((void *)0)) {
	warn("local: %s", local);
	goto abort;
}
closefunc = fclose;
}
if (fstat(fileno(fout)(!__isthreaded ? ((fout)->_file) : (fileno)(fout)), &st) == -1 || st.st_blksize == 0)
st.st_blksize = BUFSIZ1024;
if (st.st_blksize > bufsize) {
(void)free(buf);
buf = malloc((unsigned)st.st_blksize);
if (buf == NULL((void *)0)) {
	warn("malloc");
	bufsize = 0;
	goto abort;
}
bufsize = st.st_blksize;
}
if ((st.st_mode & S_IFMT0170000) != S_IFREG0100000) {
if (progress == 1)
	progress = 0;
preserve = 0;
}
progressmeter(-1, remote);
may_reset_noop_timeout();
serrno = 0;
switch (curtype) {

case TYPE_I3:
if (restart_point &&
    lseek(fileno(fout)(!__isthreaded ? ((fout)->_file) : (fileno)(fout)), restart_point, SEEK_SET0) == -1) {
	warn("local: %s", local);
	progress = oprogress;
	preserve = opreserve;
	if (closefunc != NULL((void *)0))
		(*closefunc)(fout);
	return;
}
errno(*__errno()) = d = 0;
while ((c = read(fileno(din)(!__isthreaded ? ((din)->_file) : (fileno)(din)), buf, bufsize)) > 0) {
	ssize_t	wr;
	size_t	rd = c;

	may_send_noop_char();
	d = 0;
	do {
		wr = write(fileno(fout)(!__isthreaded ? ((fout)->_file) : (fileno)(fout)), buf + d, rd);
		if (wr == -1) {
			d = -1;
			break;
		}
		d += wr;
		rd -= wr;
	} while (d < c);
	if (rd != 0)
		break;
	bytes += c;
	if (hash && (!progress || filesize < 0)) {
		while (bytes >= hashbytes) {
			(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
			hashbytes += mark;
		}
		(void)fflush(ttyout);
	}
}
if (c == -1 || d < c)
	serrno = errno(*__errno());
if (hash && (!progress || filesize < 0) && bytes > 0) {
	if (bytes < mark)
		(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
	(void)putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
	(void)fflush(ttyout);
}
if (c < 0) {
	if (serrno != EPIPE32)
		warnc(serrno, "netin");
	bytes = -1;
}
if (d < c) {
	if (d < 0)
		warnc(serrno, "local: %s", local);
	else
		warnx("%s: short write", local);
}
break;

case TYPE_A1:
if (restart_point) {
	int i, n, ch;

	if (fseek(fout, 0L, SEEK_SET0) == -1)
		goto done;
	n = restart_point;
	for (i = 0; i++ < n;) {
		if ((ch = fgetc(fout)) == EOF(-1)) {
			if (!ferror(fout)(!__isthreaded ? (((fout)->_flags & 0x0040) != 0) : (ferror
)(fout)))
				errno(*__errno()) = 0;
			goto done;
		}
		if (ch == '\n')
			i++;
	}
	if (fseek(fout, 0L, SEEK_CUR1) == -1) {
1127done:
		if (errno(*__errno()))
			warn("local: %s", local);
		else
			warnx("local: %s", local);
		progress = oprogress;
		preserve = opreserve;
		if (closefunc != NULL((void *)0))
			(*closefunc)(fout);
		return;
	}
}
while ((c = fgetc(din)) != EOF(-1)) {
	may_send_noop_char();
	if (c == '\n')
		bare_lfs++;
	while (c == '\r') {
		while (hash && (!progress || filesize < 0) &&
		    (bytes >= hashbytes)) {
			(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
			(void)fflush(ttyout);
			hashbytes += mark;
		}
		bytes++;
		if ((c = fgetc(din)) != '\n' || tcrflag) {
			if (ferror(fout)(!__isthreaded ? (((fout)->_flags & 0x0040) != 0) : (ferror
)(fout)))
				goto break2;
			(void)putc('\r', fout)(!__isthreaded ? __sputc('\r', fout) : (putc)('\r', fout));
			if (c == '\0') {
				bytes++;
				goto contin2;
			}
			if (c == EOF(-1))
				goto contin2;
		}
	}
	(void)putc(c, fout)(!__isthreaded ? __sputc(c, fout) : (putc)(c, fout));
	bytes++;
contin2:	;
}
1167break2:
if (ferror(din)(!__isthreaded ? (((din)->_flags & 0x0040) != 0) : (ferror
)(din)) || ferror(fout)(!__isthreaded ? (((fout)->_flags & 0x0040) != 0) : (ferror
)(fout)))
	serrno = errno(*__errno());
if (bare_lfs) {
	fprintf(ttyout,
1172"WARNING! %d bare linefeeds received in ASCII mode.\n", bare_lfs);
	fputs("File may not have transferred correctly.\n",
	    ttyout);
}
if (hash && (!progress || filesize < 0)) {
	if (bytes < hashbytes)
		(void)putc('#', ttyout)(!__isthreaded ? __sputc('#', ttyout) : (putc)('#', ttyout));
	(void)putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
	(void)fflush(ttyout);
}
if (ferror(din)(!__isthreaded ? (((din)->_flags & 0x0040) != 0) : (ferror
)(din))) {
	if (serrno != EPIPE32)
		warnc(serrno, "netin");
	bytes = -1;
}
if (ferror(fout)(!__isthreaded ? (((fout)->_flags & 0x0040) != 0) : (ferror
)(fout)))
	warnc(serrno, "local: %s", local);
break;
}
progressmeter(1, NULL((void *)0));
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL((void *)0))
(*closefunc)(fout);
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
if (oldintp)
(void)signal(SIGPIPE13, oldintp);
(void)fclose(din);
(void)getreply(0);
may_receive_noop_ack();
if (bytes >= 0 && is_retr) {
if (bytes > 0)
	ptransfer(0);
if (preserve && (closefunc == fclose)) {
	mtime = remotemodtime(remote, 0);
	if (mtime != -1) {
		struct timespec times[2];

		times[0].tv_nsec = UTIME_OMIT-1L;
		times[1].tv_sec = mtime;
		times[1].tv_nsec = 0;
		if (utimensat(AT_FDCWD-100, local, times, 0) == -1)
			fprintf(ttyout,
		"Can't change modification time on %s to %s",
			    local, asctime(localtime(&mtime)));
	}
}
}
return;

1223abort:
/* abort using RFC959 recommended IP,SYNC sequence */
progress = oprogress;
preserve = opreserve;
if (oldintp)
(void)signal(SIGPIPE13, oldintp);
(void)signal(SIGINT2, SIG_IGN(void (*)(int))1);
if (!cpend) {
code = -1;
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
return;
}

abort_remote(din);
code = -1;
if (data >= 0) {
(void)close(data);
data = -1;
}
if (closefunc != NULL((void *)0) && fout != NULL((void *)0))
(*closefunc)(fout);
if (din)
(void)fclose(din);
if (bytes > 0)
ptransfer(0);
(void)signal(SIGINT2, oldintr);
(void)signal(SIGINFO29, oldinti);
1251}

1253/*
* Need to start a listen on the data channel before we send the command,
* otherwise the server's connect may fail.
*/
1257int
1258initconn(void)
1259{
char *p, *a;
int result = ERROR5, tmpno = 0;
int on = 1;
int error;
u_int addr[16], port[2];
u_int af, hal, pal;
char *pasvcmd = NULL((void *)0);
socklen_t namelen;
1268#ifndef SMALL
struct addrinfo *ares;
1270#endif

if (myctladdr.sa.sa_family == AF_INET624
&& (IN6_IS_ADDR_LINKLOCAL(&myctladdr.sin6.sin6_addr)(((&myctladdr.sin6.sin6_addr)->__u6_addr.__u6_addr8[0]
 == 0xfe) && (((&myctladdr.sin6.sin6_addr)->__u6_addr
.__u6_addr8[1] & 0xc0) == 0x80))
 || IN6_IS_ADDR_SITELOCAL(&myctladdr.sin6.sin6_addr)(((&myctladdr.sin6.sin6_addr)->__u6_addr.__u6_addr8[0]
 == 0xfe) && (((&myctladdr.sin6.sin6_addr)->__u6_addr
.__u6_addr8[1] & 0xc0) == 0xc0)))) {
warnx("use of scoped address can be troublesome");
}
1277#ifndef SMALL
if (srcaddr) {
struct addrinfo ahints;

memset(&ahints, 0, sizeof(ahints));
ahints.ai_family = family;
ahints.ai_socktype = SOCK_STREAM1;
ahints.ai_flags |= AI_NUMERICHOST4;
ahints.ai_protocol = 0;

error = getaddrinfo(srcaddr, NULL((void *)0), &ahints, &ares);
if (error) {
	warnx("%s: %s", srcaddr, gai_strerror(error));
	code = -1;
	return (0);
}
}
1294#endif /* !SMALL */
1295reinit:
if (passivemode) {
data_addr = myctladdr;
data = socket(data_addr.sa.sa_family, SOCK_STREAM1, 0);
if (data == -1) {
	warn("socket");
	return (1);
}
1303#ifndef SMALL
if (srcaddr) {
	if (bind(data, ares->ai_addr, ares->ai_addrlen) == -1) {
		warn("bind");
		close(data);
		return (1);
	}
}
if ((options & SO_DEBUG0x0001) &&
    setsockopt(data, SOL_SOCKET0xffff, SO_DEBUG0x0001, (char *)&on,
    sizeof(on)) == -1)
	warn("setsockopt (ignored)");
1315#endif /* !SMALL */
switch (data_addr.sa.sa_family) {
case AF_INET2:
	if (epsv4 && !epsv4bad) {
		int ov;
		/* shut this command up in case it fails */
		ov = verbose;
		verbose = -1;
		result = command(pasvcmd = "EPSV");
		/*
		 * now back to whatever verbosity we had before
		 * and we can try PASV
		 */
		verbose = ov;
		if (code / 10 == 22 && code != 229) {
			fputs(
1331"wrong server: return code must be 229\n",
				ttyout);
			result = COMPLETE2 + 1;
		}
		if (result != COMPLETE2) {
			epsv4bad = 1;
1337#ifndef SMALL
			if (debug) {
				fputs(
1340"disabling epsv4 for this connection\n",
				    ttyout);
			}
1343#endif /* !SMALL */
		}
	}
	if (result != COMPLETE2)
		result = command(pasvcmd = "PASV");
	break;
case AF_INET624:
	result = command(pasvcmd = "EPSV");
	if (code / 10 == 22 && code != 229) {
		fputs(
1353"wrong server: return code must be 229\n",
			ttyout);
		result = COMPLETE2 + 1;
	}
	if (result != COMPLETE2)
		result = command(pasvcmd = "LPSV");
	break;
default:
	result = COMPLETE2 + 1;
	break;
}
if (result != COMPLETE2) {
	if (activefallback) {
		(void)close(data);
		data = -1;
		passivemode = 0;
		activefallback = 0;
		goto reinit;
	}
	fputs("Passive mode refused.\n", ttyout);
	goto bad;
}

1376#define pack2(var, off)(((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] &
 0xff) << 0)) \
(((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
1378#define pack4(var, off)(((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1]
 & 0xff) << 16) | ((var[(off) + 2] & 0xff) <<
 8) | ((var[(off) + 3] & 0xff) << 0)) \
(((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \
((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0))

/*
 * What we've got at this point is a string of comma separated
 * one-byte unsigned integer values, separated by commas.
 */
if (!pasvcmd)
	goto bad;
if (strcmp(pasvcmd, "PASV") == 0) {
	if (data_addr.sa.sa_family != AF_INET2) {
		fputs(
1391"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
		goto bad;
	}
	if (code / 10 == 22 && code != 227) {
		fputs("wrong server: return code must be 227\n",
			ttyout);
		goto bad;
	}
	error = sscanf(pasv, "%u,%u,%u,%u,%u,%u",
			&addr[0], &addr[1], &addr[2], &addr[3],
			&port[0], &port[1]);
	if (error != 6) {
		fputs(
1404"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
		goto bad;
	}
	memset(&data_addr, 0, sizeof(data_addr));
	data_addr.sin.sin_family = AF_INET2;
	data_addr.sin.sin_len = sizeof(struct sockaddr_in);
	data_addr.sin.sin_addr.s_addr =
		htonl(pack4(addr, 0))(__uint32_t)(__builtin_constant_p((((addr[(0) + 0] & 0xff
) << 24) | ((addr[(0) + 1] & 0xff) << 16) | (
(addr[(0) + 2] & 0xff) << 8) | ((addr[(0) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(0)
 + 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff) << 24 | ((__uint32_t
)((((addr[(0) + 0] & 0xff) << 24) | ((addr[(0) + 1]
 & 0xff) << 16) | ((addr[(0) + 2] & 0xff) <<
 8) | ((addr[(0) + 3] & 0xff) << 0))) & 0xff00)
 << 8 | ((__uint32_t)((((addr[(0) + 0] & 0xff) <<
 24) | ((addr[(0) + 1] & 0xff) << 16) | ((addr[(0) +
 2] & 0xff) << 8) | ((addr[(0) + 3] & 0xff) <<
 0))) & 0xff0000) >> 8 | ((__uint32_t)((((addr[(0) +
 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff000000) >> 24) :
 __swap32md((((addr[(0) + 0] & 0xff) << 24) | ((addr
[(0) + 1] & 0xff) << 16) | ((addr[(0) + 2] & 0xff
) << 8) | ((addr[(0) + 3] & 0xff) << 0))));
	data_addr.sin.sin_port = htons(pack2(port, 0))(__uint16_t)(__builtin_constant_p((((port[(0) + 0] & 0xff
) << 8) | ((port[(0) + 1] & 0xff) << 0))) ? (
__uint16_t)(((__uint16_t)((((port[(0) + 0] & 0xff) <<
 8) | ((port[(0) + 1] & 0xff) << 0))) & 0xffU) <<
| ((__uint16_t)((((port[(0) + 0] & 0xff) << 8) |
 ((port[(0) + 1] & 0xff) << 0))) & 0xff00U) >>
 8) : __swap16md((((port[(0) + 0] & 0xff) << 8) | (
(port[(0) + 1] & 0xff) << 0))));
} else if (strcmp(pasvcmd, "LPSV") == 0) {
	if (code / 10 == 22 && code != 228) {
		fputs("wrong server: return code must be 228\n",
			ttyout);
		goto bad;
	}
	switch (data_addr.sa.sa_family) {
	case AF_INET2:
		error = sscanf(pasv,
1422"%u,%u,%u,%u,%u,%u,%u,%u,%u",
			&af, &hal,
			&addr[0], &addr[1], &addr[2], &addr[3],
			&pal, &port[0], &port[1]);
		if (error != 9) {
			fputs(
1428"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
			goto bad;
		}
		if (af != 4 || hal != 4 || pal != 2) {
			fputs(
1433"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
			error = 1;
			goto bad;
		}

		memset(&data_addr, 0, sizeof(data_addr));
		data_addr.sin.sin_family = AF_INET2;
		data_addr.sin.sin_len = sizeof(struct sockaddr_in);
		data_addr.sin.sin_addr.s_addr =
			htonl(pack4(addr, 0))(__uint32_t)(__builtin_constant_p((((addr[(0) + 0] & 0xff
) << 24) | ((addr[(0) + 1] & 0xff) << 16) | (
(addr[(0) + 2] & 0xff) << 8) | ((addr[(0) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(0)
 + 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff) << 24 | ((__uint32_t
)((((addr[(0) + 0] & 0xff) << 24) | ((addr[(0) + 1]
 & 0xff) << 16) | ((addr[(0) + 2] & 0xff) <<
 8) | ((addr[(0) + 3] & 0xff) << 0))) & 0xff00)
 << 8 | ((__uint32_t)((((addr[(0) + 0] & 0xff) <<
 24) | ((addr[(0) + 1] & 0xff) << 16) | ((addr[(0) +
 2] & 0xff) << 8) | ((addr[(0) + 3] & 0xff) <<
 0))) & 0xff0000) >> 8 | ((__uint32_t)((((addr[(0) +
 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff000000) >> 24) :
 __swap32md((((addr[(0) + 0] & 0xff) << 24) | ((addr
[(0) + 1] & 0xff) << 16) | ((addr[(0) + 2] & 0xff
) << 8) | ((addr[(0) + 3] & 0xff) << 0))));
		data_addr.sin.sin_port = htons(pack2(port, 0))(__uint16_t)(__builtin_constant_p((((port[(0) + 0] & 0xff
) << 8) | ((port[(0) + 1] & 0xff) << 0))) ? (
__uint16_t)(((__uint16_t)((((port[(0) + 0] & 0xff) <<
 8) | ((port[(0) + 1] & 0xff) << 0))) & 0xffU) <<
| ((__uint16_t)((((port[(0) + 0] & 0xff) << 8) |
 ((port[(0) + 1] & 0xff) << 0))) & 0xff00U) >>
 8) : __swap16md((((port[(0) + 0] & 0xff) << 8) | (
(port[(0) + 1] & 0xff) << 0))));
		break;
	case AF_INET624:
		error = sscanf(pasv,
1447"%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u",
			&af, &hal,
			&addr[0], &addr[1], &addr[2], &addr[3],
			&addr[4], &addr[5], &addr[6], &addr[7],
			&addr[8], &addr[9], &addr[10],
			&addr[11], &addr[12], &addr[13],
			&addr[14], &addr[15],
			&pal, &port[0], &port[1]);
		if (error != 21) {
			fputs(
1457"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
			goto bad;
		}
		if (af != 6 || hal != 16 || pal != 2) {
			fputs(
1462"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
			goto bad;
		}

		memset(&data_addr, 0, sizeof(data_addr));
		data_addr.sin6.sin6_family = AF_INET624;
		data_addr.sin6.sin6_len = sizeof(struct sockaddr_in6);
	    {
		u_int32_t *p32;
		p32 = (u_int32_t *)&data_addr.sin6.sin6_addr;
		p32[0] = htonl(pack4(addr, 0))(__uint32_t)(__builtin_constant_p((((addr[(0) + 0] & 0xff
) << 24) | ((addr[(0) + 1] & 0xff) << 16) | (
(addr[(0) + 2] & 0xff) << 8) | ((addr[(0) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(0)
 + 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff) << 24 | ((__uint32_t
)((((addr[(0) + 0] & 0xff) << 24) | ((addr[(0) + 1]
 & 0xff) << 16) | ((addr[(0) + 2] & 0xff) <<
 8) | ((addr[(0) + 3] & 0xff) << 0))) & 0xff00)
 << 8 | ((__uint32_t)((((addr[(0) + 0] & 0xff) <<
 24) | ((addr[(0) + 1] & 0xff) << 16) | ((addr[(0) +
 2] & 0xff) << 8) | ((addr[(0) + 3] & 0xff) <<
 0))) & 0xff0000) >> 8 | ((__uint32_t)((((addr[(0) +
 0] & 0xff) << 24) | ((addr[(0) + 1] & 0xff) <<
 16) | ((addr[(0) + 2] & 0xff) << 8) | ((addr[(0) +
 3] & 0xff) << 0))) & 0xff000000) >> 24) :
 __swap32md((((addr[(0) + 0] & 0xff) << 24) | ((addr
[(0) + 1] & 0xff) << 16) | ((addr[(0) + 2] & 0xff
) << 8) | ((addr[(0) + 3] & 0xff) << 0))));
		p32[1] = htonl(pack4(addr, 4))(__uint32_t)(__builtin_constant_p((((addr[(4) + 0] & 0xff
) << 24) | ((addr[(4) + 1] & 0xff) << 16) | (
(addr[(4) + 2] & 0xff) << 8) | ((addr[(4) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(4)
 + 0] & 0xff) << 24) | ((addr[(4) + 1] & 0xff) <<
 16) | ((addr[(4) + 2] & 0xff) << 8) | ((addr[(4) +
 3] & 0xff) << 0))) & 0xff) << 24 | ((__uint32_t
)((((addr[(4) + 0] & 0xff) << 24) | ((addr[(4) + 1]
 & 0xff) << 16) | ((addr[(4) + 2] & 0xff) <<
 8) | ((addr[(4) + 3] & 0xff) << 0))) & 0xff00)
 << 8 | ((__uint32_t)((((addr[(4) + 0] & 0xff) <<
 24) | ((addr[(4) + 1] & 0xff) << 16) | ((addr[(4) +
 2] & 0xff) << 8) | ((addr[(4) + 3] & 0xff) <<
 0))) & 0xff0000) >> 8 | ((__uint32_t)((((addr[(4) +
 0] & 0xff) << 24) | ((addr[(4) + 1] & 0xff) <<
 16) | ((addr[(4) + 2] & 0xff) << 8) | ((addr[(4) +
 3] & 0xff) << 0))) & 0xff000000) >> 24) :
 __swap32md((((addr[(4) + 0] & 0xff) << 24) | ((addr
[(4) + 1] & 0xff) << 16) | ((addr[(4) + 2] & 0xff
) << 8) | ((addr[(4) + 3] & 0xff) << 0))));
		p32[2] = htonl(pack4(addr, 8))(__uint32_t)(__builtin_constant_p((((addr[(8) + 0] & 0xff
) << 24) | ((addr[(8) + 1] & 0xff) << 16) | (
(addr[(8) + 2] & 0xff) << 8) | ((addr[(8) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(8)
 + 0] & 0xff) << 24) | ((addr[(8) + 1] & 0xff) <<
 16) | ((addr[(8) + 2] & 0xff) << 8) | ((addr[(8) +
 3] & 0xff) << 0))) & 0xff) << 24 | ((__uint32_t
)((((addr[(8) + 0] & 0xff) << 24) | ((addr[(8) + 1]
 & 0xff) << 16) | ((addr[(8) + 2] & 0xff) <<
 8) | ((addr[(8) + 3] & 0xff) << 0))) & 0xff00)
 << 8 | ((__uint32_t)((((addr[(8) + 0] & 0xff) <<
 24) | ((addr[(8) + 1] & 0xff) << 16) | ((addr[(8) +
 2] & 0xff) << 8) | ((addr[(8) + 3] & 0xff) <<
 0))) & 0xff0000) >> 8 | ((__uint32_t)((((addr[(8) +
 0] & 0xff) << 24) | ((addr[(8) + 1] & 0xff) <<
 16) | ((addr[(8) + 2] & 0xff) << 8) | ((addr[(8) +
 3] & 0xff) << 0))) & 0xff000000) >> 24) :
 __swap32md((((addr[(8) + 0] & 0xff) << 24) | ((addr
[(8) + 1] & 0xff) << 16) | ((addr[(8) + 2] & 0xff
) << 8) | ((addr[(8) + 3] & 0xff) << 0))));
		p32[3] = htonl(pack4(addr, 12))(__uint32_t)(__builtin_constant_p((((addr[(12) + 0] & 0xff
) << 24) | ((addr[(12) + 1] & 0xff) << 16) | (
(addr[(12) + 2] & 0xff) << 8) | ((addr[(12) + 3] &
 0xff) << 0))) ? (__uint32_t)(((__uint32_t)((((addr[(12
) + 0] & 0xff) << 24) | ((addr[(12) + 1] & 0xff
) << 16) | ((addr[(12) + 2] & 0xff) << 8) | (
(addr[(12) + 3] & 0xff) << 0))) & 0xff) <<
| ((__uint32_t)((((addr[(12) + 0] & 0xff) << 24
) | ((addr[(12) + 1] & 0xff) << 16) | ((addr[(12) +
 2] & 0xff) << 8) | ((addr[(12) + 3] & 0xff) <<
 0))) & 0xff00) << 8 | ((__uint32_t)((((addr[(12) +
 0] & 0xff) << 24) | ((addr[(12) + 1] & 0xff) <<
 16) | ((addr[(12) + 2] & 0xff) << 8) | ((addr[(12)
 + 3] & 0xff) << 0))) & 0xff0000) >> 8 | (
(__uint32_t)((((addr[(12) + 0] & 0xff) << 24) | ((addr
[(12) + 1] & 0xff) << 16) | ((addr[(12) + 2] & 0xff
) << 8) | ((addr[(12) + 3] & 0xff) << 0))) &
 0xff000000) >> 24) : __swap32md((((addr[(12) + 0] &
 0xff) << 24) | ((addr[(12) + 1] & 0xff) << 16
) | ((addr[(12) + 2] & 0xff) << 8) | ((addr[(12) + 3
] & 0xff) << 0))));
	    }
		data_addr.sin6.sin6_port = htons(pack2(port, 0))(__uint16_t)(__builtin_constant_p((((port[(0) + 0] & 0xff
) << 8) | ((port[(0) + 1] & 0xff) << 0))) ? (
__uint16_t)(((__uint16_t)((((port[(0) + 0] & 0xff) <<
 8) | ((port[(0) + 1] & 0xff) << 0))) & 0xffU) <<
| ((__uint16_t)((((port[(0) + 0] & 0xff) << 8) |
 ((port[(0) + 1] & 0xff) << 0))) & 0xff00U) >>
 8) : __swap16md((((port[(0) + 0] & 0xff) << 8) | (
(port[(0) + 1] & 0xff) << 0))));
		break;
	default:
		fputs("Bad family!\n", ttyout);
		goto bad;
	}
} else if (strcmp(pasvcmd, "EPSV") == 0) {
	char delim[4];

	port[0] = 0;
	if (code / 10 == 22 && code != 229) {
		fputs("wrong server: return code must be 229\n",
			ttyout);
		goto bad;
	}
	if (sscanf(pasv, "%c%c%c%d%c", &delim[0],
			&delim[1], &delim[2], &port[1],
			&delim[3]) != 5) {
		fputs("parse error!\n", ttyout);
		goto bad;
	}
	if (delim[0] != delim[1] || delim[0] != delim[2]
	 || delim[0] != delim[3]) {
		fputs("parse error!\n", ttyout);
		goto bad;
	}
	data_addr = hisctladdr;
	data_addr.sin.sin_port = htons(port[1])(__uint16_t)(__builtin_constant_p(port[1]) ? (__uint16_t)(((__uint16_t
)(port[1]) & 0xffU) << 8 | ((__uint16_t)(port[1]) &
 0xff00U) >> 8) : __swap16md(port[1]));
} else
	goto bad;

error = timed_connect(data, &data_addr.sa, data_addr.sa.sa_len,
    connect_timeout);
if (error != 0) {
	if (activefallback) {
		(void)close(data);
		data = -1;
		passivemode = 0;
		activefallback = 0;
		goto reinit;
	}
	warn("connect");
	goto bad;
}
if (data_addr.sa.sa_family == AF_INET2) {
	on = IPTOS_THROUGHPUT0x08;
	if (setsockopt(data, IPPROTO_IP0, IP_TOS3, (char *)&on,
	    sizeof(int)) == -1)
		warn("setsockopt TOS (ignored)");
}
return (0);
}

1530noport:
data_addr = myctladdr;
if (sendport)
data_addr.sin.sin_port = 0;	/* let system pick one */
if (data != -1)
(void)close(data);
data = socket(data_addr.sa.sa_family, SOCK_STREAM1, 0);
if (data == -1) {
warn("socket");
if (tmpno)
	sendport = 1;
return (1);
}
if (!sendport)
if (setsockopt(data, SOL_SOCKET0xffff, SO_REUSEADDR0x0004, (char *)&on,
		sizeof(on)) == -1) {
	warn("setsockopt (reuse address)");
	goto bad;
}
switch (data_addr.sa.sa_family) {
case AF_INET2:
on = IP_PORTRANGE_HIGH1;
if (setsockopt(data, IPPROTO_IP0, IP_PORTRANGE19,
    (char *)&on, sizeof(on)) == -1)
	warn("setsockopt IP_PORTRANGE (ignored)");
break;
case AF_INET624:
on = IPV6_PORTRANGE_HIGH1;
if (setsockopt(data, IPPROTO_IPV641, IPV6_PORTRANGE14,
    (char *)&on, sizeof(on)) == -1)
	warn("setsockopt IPV6_PORTRANGE (ignored)");
break;
}
if (bind(data, &data_addr.sa, data_addr.sa.sa_len) == -1) {
warn("bind");
goto bad;
}
1567#ifndef SMALL
if (options & SO_DEBUG0x0001 &&
   setsockopt(data, SOL_SOCKET0xffff, SO_DEBUG0x0001, (char *)&on,
	sizeof(on)) == -1)
warn("setsockopt (ignored)");
1572#endif /* !SMALL */
namelen = sizeof(data_addr);
if (getsockname(data, &data_addr.sa, &namelen) == -1) {
warn("getsockname");
goto bad;
}
if (listen(data, 1) == -1)
warn("listen");

1581#define	UC(b)(((int)b)&0xff)	(((int)b)&0xff)

if (sendport) {
char hname[NI_MAXHOST256], pbuf[NI_MAXSERV32];
int af_tmp;
union sockaddr_union tmp;

tmp = data_addr;
switch (tmp.sa.sa_family) {
case AF_INET2:
	if (!epsv4 || epsv4bad) {
		result = COMPLETE2 +1;
		break;
	}
	/*FALLTHROUGH*/
case AF_INET624:
	if (tmp.sa.sa_family == AF_INET624)
		tmp.sin6.sin6_scope_id = 0;
	af_tmp = (tmp.sa.sa_family == AF_INET2) ? 1 : 2;
	if (getnameinfo(&tmp.sa, tmp.sa.sa_len, hname,
	    sizeof(hname), pbuf, sizeof(pbuf),
	    NI_NUMERICHOST1 | NI_NUMERICSERV2)) {
		result = ERROR5;
	} else {
		result = command("EPRT |%d|%s|%s|",
		    af_tmp, hname, pbuf);
		if (result != COMPLETE2) {
			epsv4bad = 1;
1609#ifndef SMALL
			if (debug) {
				fputs(
1612"disabling epsv4 for this connection\n",
				    ttyout);
			}
1615#endif /* !SMALL */
		}
	}
	break;
default:
	result = COMPLETE2 + 1;
	break;
}
if (result == COMPLETE2)
	goto skip_port;

switch (data_addr.sa.sa_family) {
case AF_INET2:
	a = (char *)&data_addr.sin.sin_addr;
	p = (char *)&data_addr.sin.sin_port;
	result = command("PORT %d,%d,%d,%d,%d,%d",
		 UC(a[0])(((int)a[0])&0xff), UC(a[1])(((int)a[1])&0xff), UC(a[2])(((int)a[2])&0xff), UC(a[3])(((int)a[3])&0xff),
		 UC(p[0])(((int)p[0])&0xff), UC(p[1])(((int)p[1])&0xff));
	break;
case AF_INET624:
	a = (char *)&data_addr.sin6.sin6_addr;
	p = (char *)&data_addr.sin6.sin6_port;
	result = command(
1638"LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d",
		 6, 16,
		 UC(a[0])(((int)a[0])&0xff),UC(a[1])(((int)a[1])&0xff),UC(a[2])(((int)a[2])&0xff),UC(a[3])(((int)a[3])&0xff),
		 UC(a[4])(((int)a[4])&0xff),UC(a[5])(((int)a[5])&0xff),UC(a[6])(((int)a[6])&0xff),UC(a[7])(((int)a[7])&0xff),
		 UC(a[8])(((int)a[8])&0xff),UC(a[9])(((int)a[9])&0xff),UC(a[10])(((int)a[10])&0xff),UC(a[11])(((int)a[11])&0xff),
		 UC(a[12])(((int)a[12])&0xff),UC(a[13])(((int)a[13])&0xff),UC(a[14])(((int)a[14])&0xff),UC(a[15])(((int)a[15])&0xff),
		 2, UC(p[0])(((int)p[0])&0xff), UC(p[1])(((int)p[1])&0xff));
	break;
default:
	result = COMPLETE2 + 1; /* xxx */
}
skip_port:

if (result == ERROR5 && sendport == -1) {
	sendport = 0;
	tmpno = 1;
	goto noport;
}
return (result != COMPLETE2);
}
if (tmpno)
sendport = 1;
if (data_addr.sa.sa_family == AF_INET2) {
on = IPTOS_THROUGHPUT0x08;
if (setsockopt(data, IPPROTO_IP0, IP_TOS3, (char *)&on,
    sizeof(int)) == -1)
	warn("setsockopt TOS (ignored)");
}
return (0);
1667bad:
(void)close(data), data = -1;
if (tmpno)
sendport = 1;
return (1);
1672}

1674FILE *
1675dataconn(const char *lmode)
1676{
union sockaddr_union from;
socklen_t fromlen = myctladdr.sa.sa_len;
int s;

if (passivemode)
return (fdopen(data, lmode));

s = accept(data, &from.sa, &fromlen);
if (s == -1) {
warn("accept");
(void)close(data), data = -1;
return (NULL((void *)0));
}
(void)close(data);
data = s;
if (from.sa.sa_family == AF_INET2) {
int tos = IPTOS_THROUGHPUT0x08;
if (setsockopt(s, IPPROTO_IP0, IP_TOS3, (char *)&tos,
		sizeof(int)) == -1) {
	warn("setsockopt TOS (ignored)");
}
}
return (fdopen(data, lmode));
1700}

1702void
1703psummary(int signo)
1704{
int save_errno = errno(*__errno());

if (bytes > 0)
ptransfer(1);
errno(*__errno()) = save_errno;
1710}

1712void
1713psabort(int signo)
1714{

alarmtimer(0);
abrtflag++;
1718}

1720void
1721pswitch(int flag)
1722{
sig_t oldintr;
static struct comvars {
int connect;
char name[HOST_NAME_MAX255+1];
union sockaddr_union mctl;
union sockaddr_union hctl;
FILE *in;
FILE *out;
int tpe;
int curtpe;
int cpnd;
int sunqe;
int runqe;
int mcse;
int ntflg;
char nti[17];
char nto[17];
int mapflg;
char mi[PATH_MAX1024];
char mo[PATH_MAX1024];
} proxstruct, tmpstruct;
struct comvars *ip, *op;

abrtflag = 0;
oldintr = signal(SIGINT2, psabort);
if (flag) {
if (proxy)
	return;
ip = &tmpstruct;
op = &proxstruct;
proxy++;
} else {
if (!proxy)
	return;
ip = &proxstruct;
op = &tmpstruct;
proxy = 0;
}
ip->connect = connected;
connected = op->connect;
if (hostname) {
(void)strlcpy(ip->name, hostname, sizeof(ip->name));
} else
ip->name[0] = '\0';
hostname = op->name;
ip->hctl = hisctladdr;
hisctladdr = op->hctl;
ip->mctl = myctladdr;
myctladdr = op->mctl;
ip->in = cin;
cin = op->in;
ip->out = cout;
cout = op->out;
ip->tpe = type;
type = op->tpe;
ip->curtpe = curtype;
curtype = op->curtpe;
ip->cpnd = cpend;
cpend = op->cpnd;
ip->sunqe = sunique;
sunique = op->sunqe;
ip->runqe = runique;
runique = op->runqe;
ip->mcse = mcase;
mcase = op->mcse;
ip->ntflg = ntflag;
ntflag = op->ntflg;
(void)strlcpy(ip->nti, ntin, sizeof(ip->nti));
(void)strlcpy(ntin, op->nti, sizeof ntin);
(void)strlcpy(ip->nto, ntout, sizeof(ip->nto));
(void)strlcpy(ntout, op->nto, sizeof ntout);
ip->mapflg = mapflag;
mapflag = op->mapflg;
(void)strlcpy(ip->mi, mapin, sizeof(ip->mi));
(void)strlcpy(mapin, op->mi, sizeof mapin);
(void)strlcpy(ip->mo, mapout, sizeof(ip->mo));
(void)strlcpy(mapout, op->mo, sizeof mapout);
(void)signal(SIGINT2, oldintr);
if (abrtflag) {
abrtflag = 0;
(*oldintr)(SIGINT2);
}
1805}

1807void
1808abortpt(int signo)
1809{

alarmtimer(0);
putc('\n', ttyout)(!__isthreaded ? __sputc('\n', ttyout) : (putc)('\n', ttyout)
);
(void)fflush(ttyout);
ptabflg++;
mflag = 0;
abrtflag = 0;
longjmp(ptabort, 1);
1818}

1820void
1821proxtrans(const char *cmd, const char *local, const char *remote)
1822{
volatile sig_t oldintr;
int prox_type, nfnd;
volatile int secndflag;
char * volatile cmd2;
struct pollfd pfd[1];

oldintr = NULL((void *)0);
secndflag = 0;
if (strcmp(cmd, "RETR"))
cmd2 = "RETR";
else
cmd2 = runique ? "STOU" : "STOR";
if ((prox_type = type) == 0) {
if (unix_server && unix_proxy)
	prox_type = TYPE_I3;
else
	prox_type = TYPE_A1;
}
if (curtype != prox_type)
changetype(prox_type, 1);
if (command("PASV") != COMPLETE2) {
fputs("proxy server does not support third party transfers.\n",
    ttyout);
return;
}
pswitch(0);
if (!connected) {
fputs("No primary connection.\n", ttyout);
pswitch(1);
code = -1;
return;
}
if (curtype != prox_type)
changetype(prox_type, 1);
if (command("PORT %s", pasv) != COMPLETE2) {
pswitch(1);
return;
}
if (setjmp(ptabort))
goto abort;
oldintr = signal(SIGINT2, abortpt);
if (command("%s %s", cmd, remote) != PRELIM1) {
(void)signal(SIGINT2, oldintr);
pswitch(1);
return;
}
sleep(2);
pswitch(1);
secndflag++;
if (command("%s %s", cmd2, local) != PRELIM1)
goto abort;
ptflag++;
(void)getreply(0);
pswitch(0);
(void)getreply(0);
(void)signal(SIGINT2, oldintr);
pswitch(1);
ptflag = 0;
fprintf(ttyout, "local: %s remote: %s\n", local, remote);
return;
1883abort:
(void)signal(SIGINT2, SIG_IGN(void (*)(int))1);
ptflag = 0;
if (strcmp(cmd, "RETR") && !proxy)
pswitch(1);
else if (!strcmp(cmd, "RETR") && proxy)
pswitch(0);
if (!cpend && !secndflag) {  /* only here if cmd = "STOR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM1) {
	pswitch(0);
	if (cpend)
		abort_remote(NULL((void *)0));
}
pswitch(1);
if (ptabflg)
	code = -1;
(void)signal(SIGINT2, oldintr);
return;
}
if (cpend)
abort_remote(NULL((void *)0));
pswitch(!proxy);
if (!cpend && !secndflag) {  /* only if cmd = "RETR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM1) {
	pswitch(0);
	if (cpend)
		abort_remote(NULL((void *)0));
	pswitch(1);
	if (ptabflg)
		code = -1;
	(void)signal(SIGINT2, oldintr);
	return;
}
}
if (cpend)
abort_remote(NULL((void *)0));
pswitch(!proxy);
if (cpend) {
pfd[0].fd = fileno(cin)(!__isthreaded ? ((cin)->_file) : (fileno)(cin));
pfd[0].events = POLLIN0x0001;
if ((nfnd = poll(pfd, 1, 10 * 1000)) <= 0) {
	if (nfnd == -1)
		warn("abort");
	if (ptabflg)
		code = -1;
	lostpeer();
}
(void)getreply(0);
(void)getreply(0);
}
if (proxy)
pswitch(0);
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT2, oldintr);
1939}

1941#ifndef SMALL
1942void
1943reset(int argc, char *argv[])
1944{
struct pollfd pfd[1];
int nfnd = 1;

pfd[0].fd = fileno(cin)(!__isthreaded ? ((cin)->_file) : (fileno)(cin));
pfd[0].events = POLLIN0x0001;
while (nfnd > 0) {
if ((nfnd = poll(pfd, 1, 0)) == -1) {
	warn("reset");
	code = -1;
	lostpeer();
} else if (nfnd) {
	(void)getreply(0);
}
}
1959}
1960#endif

1962char *
1963gunique(const char *local)
1964{
static char new[PATH_MAX1024];
char *cp = strrchr(local, '/');
int d, count=0;
char ext = '1';

if (cp)
*cp = '\0';
d = access(cp == local ? "/" : cp ? local : ".", W_OK0x02);
if (cp)
*cp = '/';
if (d == -1) {
warn("local: %s", local);
return ((char *) 0);
}
(void)strlcpy(new, local, sizeof new);
cp = new + strlen(new);
*cp++ = '.';
while (!d) {
if (++count == 100) {
	fputs("runique: can't find unique file name.\n", ttyout);
	return ((char *) 0);
}
*cp++ = ext;
*cp = '\0';
if (ext == '9')
	ext = '0';
else
	ext++;
if ((d = access(new, F_OK0)) == -1)
	break;
if (ext != '0')
	cp--;
else if (*(cp - 2) == '.')
	*(cp - 1) = '1';
else {
	*(cp - 2) = *(cp - 2) + 1;
	cp--;
}
}
return (new);
2005}

2007jmp_buf forceabort;

2009static void
2010abortforce(int signo)
2011{
int save_errno = errno(*__errno());

2014#define MSG	"Forced abort.  The connection will be closed.\n"
(void) write(fileno(ttyout)(!__isthreaded ? ((ttyout)->_file) : (fileno)(ttyout)), MSG, strlen(MSG));
2016#undef MSG

errno(*__errno()) = save_errno;
longjmp(forceabort, 1);
2020}

2022void
2023abort_remote(FILE *din)
2024{
char buf[BUFSIZ1024];
nfds_t nfds;
int nfnd;
struct pollfd pfd[2];
sig_t oldintr;

if (cout == NULL((void *)0) || setjmp(forceabort)) {
if (cout)
	fclose(cout);
warnx("Lost control connection for abort.");
if (ptabflg)
	code = -1;
lostpeer();
return;
}

oldintr = signal(SIGINT2, abortforce);

/*
* send IAC in urgent mode instead of DM because 4.3BSD places oob mark
* after urgent byte rather than before as is protocol now
*/
snprintf(buf, sizeof buf, "%c%c%c", IAC255, IP244, IAC255);
if (send(fileno(cout)(!__isthreaded ? ((cout)->_file) : (fileno)(cout)), buf, 3, MSG_OOB0x1) != 3)
warn("abort");
fprintf(cout, "%cABOR\r\n", DM242);
(void)fflush(cout);
pfd[0].fd = fileno(cin)(!__isthreaded ? ((cin)->_file) : (fileno)(cin));
pfd[0].events = POLLIN0x0001;
nfds = 1;
if (din) {
pfd[1].fd = fileno(din)(!__isthreaded ? ((din)->_file) : (fileno)(din));
pfd[1].events = POLLIN0x0001;
nfds++;
}
if ((nfnd = poll(pfd, nfds, 10 * 1000)) <= 0) {
if (nfnd == -1)
	warn("abort");
if (ptabflg)
	code = -1;
lostpeer();
}
if (din && (pfd[1].revents & POLLIN0x0001)) {
while (read(fileno(din)(!__isthreaded ? ((din)->_file) : (fileno)(din)), buf, BUFSIZ1024) > 0)
	/* LOOP */;
}
if (getreply(0) == ERROR5 && code == 552) {
/* 552 needed for nic style abort */
(void)getreply(0);
}
(void)getreply(0);
(void)signal(SIGINT2, oldintr);
2077}