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src/usr.bin/ftp/ftp.c

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/* $OpenBSD: ftp.c,v 1.109 2023/03/08 04:43:11 guenther Exp $ */
/* $NetBSD: ftp.c,v 1.27 1997/08/18 10:20:23 lukem Exp $ */
/*
* 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.
*/
/*
* 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.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <poll.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "ftp_var.h"
union sockaddr_union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
union sockaddr_union myctladdr, hisctladdr, data_addr;
int data = -1;
int abrtflag = 0;
jmp_buf ptabort;
int ptabflg;
int ptflag = 0;
off_t restart_point = 0;
FILE *cin, *cout;
char *
hookup(char *host, char *port)
{
int s, tos, error;
static char hostnamebuf[HOST_NAME_MAX+1];
struct addrinfo hints, *res, *res0;
#ifndef SMALL
struct addrinfo *ares;
#endif
char hbuf[NI_MAXHOST];
char *cause = "unknown";
socklen_t namelen;
epsv4bad = 0;
memset((char *)&hisctladdr, 0, sizeof (hisctladdr));
memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = family;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = 0;
error = getaddrinfo(host, port, &hints, &res0);
if (error == EAI_SERVICE) {
/*
* If the services file is corrupt/missing, fall back
* on our hard-coded defines.
*/
char pbuf[NI_MAXSERV];
pbuf[0] = '\0';
if (strcmp(port, "ftp") == 0)
snprintf(pbuf, sizeof(pbuf), "%d", FTP_PORT);
else if (strcmp(port, "ftpgate") == 0)
snprintf(pbuf, sizeof(pbuf), "%d", GATE_PORT);
else if (strcmp(port, "http") == 0)
snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT);
#ifndef SMALL
else if (strcmp(port, "https") == 0)
snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT);
#endif /* !SMALL */
if (pbuf[0])
error = getaddrinfo(host, pbuf, &hints, &res0);
}
if (error) {
if (error == EAI_SERVICE)
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;
#ifndef SMALL
if (srcaddr) {
struct addrinfo ahints;
memset(&ahints, 0, sizeof(ahints));
ahints.ai_family = family;
ahints.ai_socktype = SOCK_STREAM;
ahints.ai_flags |= AI_NUMERICHOST;
ahints.ai_protocol = 0;
error = getaddrinfo(srcaddr, NULL, &ahints, &ares);
if (error) {
warnx("%s: %s", srcaddr, gai_strerror(error));
code = -1;
return (0);
}
}
#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, 0, NI_NUMERICHOST) != 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;
}
#ifndef SMALL
if (srcaddr) {
if (ares->ai_family != res->ai_family) {
close(s);
s = -1;
errno = EINVAL;
cause = "bind";
continue;
}
if (bind(s, ares->ai_addr, ares->ai_addrlen) == -1) {
cause = "bind";
error = errno;
close(s);
errno = error;
s = -1;
continue;
}
}
#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, 0,
NI_NUMERICHOST) != 0)
strlcpy(hbuf, "(unknown)",
sizeof(hbuf));
warn("connect to address %s", hbuf);
}
cause = "connect";
error = errno;
close(s);
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;
#ifndef SMALL
if (srcaddr) {
freeaddrinfo(ares);
ares = NULL;
}
#endif /* !SMALL */
if (getsockname(s, &myctladdr.sa, &namelen) == -1) {
warn("getsockname");
code = -1;
goto bad;
}
if (hisctladdr.sa.sa_family == AF_INET) {
tos = IPTOS_LOWDELAY;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos, sizeof(int)) == -1)
warn("setsockopt TOS (ignored)");
}
cin = fdopen(s, "r");
cout = fdopen(s, "w");
if (cin == NULL || cout == NULL) {
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_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on));
#ifndef SMALL
if (ret == -1 && debug)
warn("setsockopt");
#endif /* !SMALL */
}
return (hostname);
bad:
(void)close(s);
return (NULL);
}
void
cmdabort(int signo)
{
int save_errno = errno;
alarmtimer(0);
(void) write(fileno(ttyout), "\n\r", 2);
abrtflag++;
errno = save_errno;
if (ptflag)
longjmp(ptabort, 1);
}
int
command(const char *fmt, ...)
{
va_list ap;
int r;
sig_t oldintr;
abrtflag = 0;
#ifndef SMALL
if (debug) {
fputs("---> ", ttyout);
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);
putc('\n', ttyout);
(void)fflush(ttyout);
}
#endif /* !SMALL */
if (cout == NULL) {
warnx("No control connection for command.");
code = -1;
return (0);
}
oldintr = signal(SIGINT, cmdabort);
va_start(ap, fmt);
vfprintf(cout, fmt, ap);
va_end(ap);
fputs("\r\n", cout);
(void)fflush(cout);
cpend = 1;
r = getreply(!strcmp(fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN)
(*oldintr)(SIGINT);
(void)signal(SIGINT, oldintr);
return (r);
}
int keep_alive_timeout = 60; /* 0 -> no timeout */
static int full_noops_sent = 0;
static time_t last_timestamp = 0; /* 0 -> no measurement yet */
static char noop[] = "NOOP\r\n";
#define NOOP_LENGTH (sizeof noop - 1)
static int current_nop_pos = 0; /* 0 -> no noop started */
/* to achieve keep alive, we send noop one byte at a time */
static void
send_noop_char(void)
{
#ifndef SMALL
if (debug)
fprintf(ttyout, "---> %c\n", noop[current_nop_pos]);
#endif /* !SMALL */
fputc(noop[current_nop_pos++], cout);
(void)fflush(cout);
if (current_nop_pos >= NOOP_LENGTH) {
full_noops_sent++;
current_nop_pos = 0;
}
}
static void
may_reset_noop_timeout(void)
{
if (keep_alive_timeout != 0)
last_timestamp = time(NULL);
}
static void
may_receive_noop_ack(void)
{
int i;
if (cout == NULL) {
/* 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);
#ifndef SMALL
if (debug)
fprintf(ttyout, "---> %s\n", &(noop[current_nop_pos]));
#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;
}
static void
may_send_noop_char(void)
{
if (keep_alive_timeout != 0) {
if (last_timestamp != 0) {
time_t t = time(NULL);
if (t - last_timestamp >= keep_alive_timeout) {
last_timestamp = t;
send_noop_char();
}
} else {
last_timestamp = time(NULL);
}
}
}
char reply_string[BUFSIZ]; /* first line of previous reply */
int
getreply(int expecteof)
{
char current_line[BUFSIZ]; /* 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(SIGINT, cmdabort);
for (lineno = 0 ;; lineno++) {
dig = n = code = 0;
cp = current_line;
while ((c = fgetc(cin)) != '\n') {
if (c == IAC) { /* handle telnet commands */
switch (c = fgetc(cin)) {
case WILL:
case WONT:
c = fgetc(cin);
fprintf(cout, "%c%c%c", IAC, DONT, c);
(void)fflush(cout);
break;
case DO:
case DONT:
c = fgetc(cin);
fprintf(cout, "%c%c%c", IAC, WONT, c);
(void)fflush(cout);
break;
default:
break;
}
continue;
}
dig++;
if (c == EOF) {
if (expecteof) {
(void)signal(SIGINT, oldintr);
code = 221;
return (0);
}
lostpeer();
if (verbose) {
fputs(
"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);
}
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);
(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(SIGINT, oldintr);
if (code == 421 || originalcode == 421)
lostpeer();
if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN)
(*oldintr)(SIGINT);
return (n - '0');
}
}
#ifndef SMALL
jmp_buf sendabort;
void
abortsend(int signo)
{
int save_errno = errno;
alarmtimer(0);
mflag = 0;
abrtflag = 0;
#define MSG "\nsend aborted\nwaiting for remote to finish abort.\n"
(void) write(fileno(ttyout), MSG, strlen(MSG));
#undef MSG
errno = save_errno;
longjmp(sendabort, 1);
}
void
sendrequest(const char *cmd, const char *local, const char *remote,
int printnames)
{
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[BUFSIZ], *bufp;
int oprogress, serrno;
hashbytes = mark;
direction = "sent";
dout = NULL;
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;
oldintr = NULL;
oldintp = NULL;
oldinti = NULL;
lmode = "w";
if (setjmp(sendabort)) {
while (cpend) {
(void)getreply(0);
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (oldintr)
(void)signal(SIGINT, oldintr);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (oldinti)
(void)signal(SIGINFO, oldinti);
progress = oprogress;
code = -1;
return;
}
oldintr = signal(SIGINT, abortsend);
oldinti = signal(SIGINFO, psummary);
if (strcmp(local, "-") == 0) {
fin = stdin;
if (progress == 1)
progress = 0;
} else if (*local == '|') {
oldintp = signal(SIGPIPE, SIG_IGN);
fin = popen(local + 1, "r");
if (fin == NULL) {
warn("%s", local + 1);
(void)signal(SIGINT, oldintr);
(void)signal(SIGPIPE, oldintp);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (progress == 1)
progress = 0;
closefunc = pclose;
} else {
fin = fopen(local, "r");
if (fin == NULL) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
closefunc = fclose;
if (fstat(fileno(fin), &st) == -1 ||
(st.st_mode & S_IFMT) != S_IFREG) {
fprintf(ttyout, "%s: not a plain file.\n", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
fclose(fin);
code = -1;
return;
}
filesize = st.st_size;
}
if (initconn()) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
code = -1;
progress = oprogress;
if (closefunc != NULL)
(*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_A:
rc = fseeko(fin, restart_point, SEEK_SET);
break;
case TYPE_I:
if (lseek(fileno(fin), restart_point, SEEK_SET) != -1)
rc = 0;
break;
}
if (rc == -1) {
warn("local: %s", local);
progress = oprogress;
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
if (command("REST %lld", (long long) restart_point)
!= CONTINUE) {
progress = oprogress;
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
lmode = "r+w";
}
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
progress = oprogress;
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
} else
if (command("%s", cmd) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
progress = oprogress;
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
dout = dataconn(lmode);
if (dout == NULL)
goto abort;
progressmeter(-1, remote);
may_reset_noop_timeout();
oldintp = signal(SIGPIPE, SIG_IGN);
serrno = 0;
switch (curtype) {
case TYPE_I:
d = 0;
while ((c = read(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), bufp, (size_t)c))
<= 0)
break;
if (hash && (!progress || filesize < 0) ) {
while (bytes >= hashbytes) {
(void)putc('#', ttyout);
hashbytes += mark;
}
(void)fflush(ttyout);
}
}
if (c == -1 || d == -1)
serrno = errno;
if (hash && (!progress || filesize < 0) && bytes > 0) {
if (bytes < mark)
(void)putc('#', ttyout);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (c < 0)
warnc(serrno, "local: %s", local);
if (d < 0) {
if (serrno != EPIPE)
warnc(serrno, "netout");
bytes = -1;
}
break;
case TYPE_A:
while ((c = fgetc(fin)) != EOF) {
may_send_noop_char();
if (c == '\n') {
while (hash && (!progress || filesize < 0) &&
(bytes >= hashbytes)) {
(void)putc('#', ttyout);
(void)fflush(ttyout);
hashbytes += mark;
}
if (ferror(dout))
break;
(void)putc('\r', dout);
bytes++;
}
(void)putc(c, dout);
bytes++;
}
if (ferror(fin) || ferror(dout))
serrno = errno;
if (hash && (!progress || filesize < 0)) {
if (bytes < hashbytes)
(void)putc('#', ttyout);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (ferror(fin))
warnc(serrno, "local: %s", local);
if (ferror(dout)) {
if (errno != EPIPE)
warnc(serrno, "netout");
bytes = -1;
}
break;
}
progressmeter(1, NULL);
progress = oprogress;
if (closefunc != NULL)
(*closefunc)(fin);
(void)fclose(dout);
(void)getreply(0);
may_receive_noop_ack();
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, oldintp);
if (bytes > 0)
ptransfer(0);
return;
abort:
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
progress = oprogress;
if (oldintp)
(void)signal(SIGPIPE, 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 && fin != NULL)
(*closefunc)(fin);
if (bytes > 0)
ptransfer(0);
}
#endif /* !SMALL */
jmp_buf recvabort;
void
abortrecv(int signo)
{
alarmtimer(0);
mflag = 0;
abrtflag = 0;
fputs("\nreceive aborted\nwaiting for remote to finish abort.\n", ttyout);
(void)fflush(ttyout);
longjmp(recvabort, 1);
}
void
recvrequest(const char *cmd, const char * volatile local, const char *remote,
const char *lmode, int printnames, int ignorespecial)
{
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;
din = NULL;
oldinti = NULL;
hashbytes = mark;
direction = "received";
bytes = 0;
bare_lfs = 0;
filesize = -1;
oprogress = progress;
opreserve = preserve;
is_retr = strcmp(cmd, "RETR") == 0;
if (is_retr && verbose && printnames) {
if (local && (ignorespecial || *local != '-'))
fprintf(ttyout, "local: %s ", local);
if (remote)
fprintf(ttyout, "remote: %s\n", remote);
}
if (proxy && is_retr) {
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
tcrflag = !crflag && is_retr;
if (setjmp(recvabort)) {
while (cpend) {
(void)getreply(0);
}
if (data >= 0) {
(void)close(data);
data = -1;
}
if (oldintr)
(void)signal(SIGINT, oldintr);
if (oldinti)
(void)signal(SIGINFO, oldinti);
progress = oprogress;
preserve = opreserve;
code = -1;
return;
}
oldintr = signal(SIGINT, abortrecv);
oldinti = signal(SIGINFO, psummary);
if (ignorespecial || (strcmp(local, "-") && *local != '|')) {
if (access(local, W_OK) == -1) {
char *dir;
if (errno != ENOENT && errno != EACCES) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
dir = strrchr(local, '/');
if (dir != NULL)
*dir = 0;
d = access(dir == local ? "/" : dir ? local : ".", W_OK);
if (dir != NULL)
*dir = '/';
if (d == -1) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (!runique && errno == EACCES &&
chmod(local, (S_IRUSR|S_IWUSR)) == -1) {
warn("local: %s", local);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (runique && errno == EACCES &&
(local = gunique(local)) == NULL) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
} else if (runique && (local = gunique(local)) == NULL) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
}
if (!is_retr) {
if (curtype != TYPE_A)
changetype(TYPE_A, 0);
} else {
if (curtype != type)
changetype(type, 0);
filesize = remotesize(remote, 0);
}
if (initconn()) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
code = -1;
return;
}
if (setjmp(recvabort))
goto abort;
if (is_retr && restart_point &&
command("REST %lld", (long long) restart_point) != CONTINUE)
return;
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
} else {
if (command("%s", cmd) != PRELIM) {
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
}
din = dataconn("r");
if (din == NULL)
goto abort;
if (!ignorespecial && strcmp(local, "-") == 0) {
fout = stdout;
preserve = 0;
} else if (!ignorespecial && *local == '|') {
oldintp = signal(SIGPIPE, SIG_IGN);
fout = popen(local + 1, "w");
if (fout == NULL) {
warn("%s", local+1);
goto abort;
}
if (progress == 1)
progress = 0;
preserve = 0;
closefunc = pclose;
} else {
fout = fopen(local, lmode);
if (fout == NULL) {
warn("local: %s", local);
goto abort;
}
closefunc = fclose;
}
if (fstat(fileno(fout), &st) == -1 || st.st_blksize == 0)
st.st_blksize = BUFSIZ;
if (st.st_blksize > bufsize) {
(void)free(buf);
buf = malloc((unsigned)st.st_blksize);
if (buf == NULL) {
warn("malloc");
bufsize = 0;
goto abort;
}
bufsize = st.st_blksize;
}
if ((st.st_mode & S_IFMT) != S_IFREG) {
if (progress == 1)
progress = 0;
preserve = 0;
}
progressmeter(-1, remote);
may_reset_noop_timeout();
serrno = 0;
switch (curtype) {
case TYPE_I:
if (restart_point &&
lseek(fileno(fout), restart_point, SEEK_SET) == -1) {
warn("local: %s", local);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
return;
}
errno = d = 0;
while ((c = read(fileno(din), buf, bufsize)) > 0) {
ssize_t wr;
size_t rd = c;
may_send_noop_char();
d = 0;
do {
wr = write(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);
hashbytes += mark;
}
(void)fflush(ttyout);
}
}
if (c == -1 || d < c)
serrno = errno;
if (hash && (!progress || filesize < 0) && bytes > 0) {
if (bytes < mark)
(void)putc('#', ttyout);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (c < 0) {
if (serrno != EPIPE)
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_A:
if (restart_point) {
int i, n, ch;
if (fseek(fout, 0L, SEEK_SET) == -1)
goto done;
n = restart_point;
for (i = 0; i++ < n;) {
if ((ch = fgetc(fout)) == EOF) {
if (!ferror(fout))
errno = 0;
goto done;
}
if (ch == '\n')
i++;
}
if (fseek(fout, 0L, SEEK_CUR) == -1) {
done:
if (errno)
warn("local: %s", local);
else
warnx("local: %s", local);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
return;
}
}
while ((c = fgetc(din)) != EOF) {
may_send_noop_char();
if (c == '\n')
bare_lfs++;
while (c == '\r') {
while (hash && (!progress || filesize < 0) &&
(bytes >= hashbytes)) {
(void)putc('#', ttyout);
(void)fflush(ttyout);
hashbytes += mark;
}
bytes++;
if ((c = fgetc(din)) != '\n' || tcrflag) {
if (ferror(fout))
goto break2;
(void)putc('\r', fout);
if (c == '\0') {
bytes++;
goto contin2;
}
if (c == EOF)
goto contin2;
}
}
(void)putc(c, fout);
bytes++;
contin2: ;
}
break2:
if (ferror(din) || ferror(fout))
serrno = errno;
if (bare_lfs) {
fprintf(ttyout,
"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);
(void)putc('\n', ttyout);
(void)fflush(ttyout);
}
if (ferror(din)) {
if (serrno != EPIPE)
warnc(serrno, "netin");
bytes = -1;
}
if (ferror(fout))
warnc(serrno, "local: %s", local);
break;
}
progressmeter(1, NULL);
progress = oprogress;
preserve = opreserve;
if (closefunc != NULL)
(*closefunc)(fout);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
if (oldintp)
(void)signal(SIGPIPE, 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;
times[1].tv_sec = mtime;
times[1].tv_nsec = 0;
if (utimensat(AT_FDCWD, local, times, 0) == -1)
fprintf(ttyout,
"Can't change modification time on %s to %s",
local, asctime(localtime(&mtime)));
}
}
}
return;
abort:
/* abort using RFC959 recommended IP,SYNC sequence */
progress = oprogress;
preserve = opreserve;
if (oldintp)
(void)signal(SIGPIPE, oldintp);
(void)signal(SIGINT, SIG_IGN);
if (!cpend) {
code = -1;
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
return;
}
abort_remote(din);
code = -1;
if (data >= 0) {
(void)close(data);
data = -1;
}
if (closefunc != NULL && fout != NULL)
(*closefunc)(fout);
if (din)
(void)fclose(din);
if (bytes > 0)
ptransfer(0);
(void)signal(SIGINT, oldintr);
(void)signal(SIGINFO, oldinti);
}
/*
* Need to start a listen on the data channel before we send the command,
* otherwise the server's connect may fail.
*/
int
initconn(void)
{
char *p, *a;
int result = ERROR, tmpno = 0;
int on = 1;
int error;
u_int addr[16], port[2];
u_int af, hal, pal;
char *pasvcmd = NULL;
socklen_t namelen;
#ifndef SMALL
struct addrinfo *ares;
#endif
if (myctladdr.sa.sa_family == AF_INET6
&& (IN6_IS_ADDR_LINKLOCAL(&myctladdr.sin6.sin6_addr)
|| IN6_IS_ADDR_SITELOCAL(&myctladdr.sin6.sin6_addr))) {
warnx("use of scoped address can be troublesome");
}
#ifndef SMALL
if (srcaddr) {
struct addrinfo ahints;
memset(&ahints, 0, sizeof(ahints));
ahints.ai_family = family;
ahints.ai_socktype = SOCK_STREAM;
ahints.ai_flags |= AI_NUMERICHOST;
ahints.ai_protocol = 0;
error = getaddrinfo(srcaddr, NULL, &ahints, &ares);
if (error) {
warnx("%s: %s", srcaddr, gai_strerror(error));
code = -1;
return (0);
}
}
#endif /* !SMALL */
reinit:
if (passivemode) {
data_addr = myctladdr;
data = socket(data_addr.sa.sa_family, SOCK_STREAM, 0);
if (data == -1) {
warn("socket");
return (1);
}
#ifndef SMALL
if (srcaddr) {
if (bind(data, ares->ai_addr, ares->ai_addrlen) == -1) {
warn("bind");
close(data);
return (1);
}
}
if ((options & SO_DEBUG) &&
setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on,
sizeof(on)) == -1)
warn("setsockopt (ignored)");
#endif /* !SMALL */
switch (data_addr.sa.sa_family) {
case AF_INET:
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(
"wrong server: return code must be 229\n",
ttyout);
result = COMPLETE + 1;
}
if (result != COMPLETE) {
epsv4bad = 1;
#ifndef SMALL
if (debug) {
fputs(
"disabling epsv4 for this connection\n",
ttyout);
}
#endif /* !SMALL */
}
}
if (result != COMPLETE)
result = command(pasvcmd = "PASV");
break;
case AF_INET6:
result = command(pasvcmd = "EPSV");
if (code / 10 == 22 && code != 229) {
fputs(
"wrong server: return code must be 229\n",
ttyout);
result = COMPLETE + 1;
}
if (result != COMPLETE)
result = command(pasvcmd = "LPSV");
break;
default:
result = COMPLETE + 1;
break;
}
if (result != COMPLETE) {
if (activefallback) {
(void)close(data);
data = -1;
passivemode = 0;
activefallback = 0;
goto reinit;
}
fputs("Passive mode refused.\n", ttyout);
goto bad;
}
#define pack2(var, off) \
(((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0))
#define pack4(var, off) \
(((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_INET) {
fputs(
"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(
"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_INET;
data_addr.sin.sin_len = sizeof(struct sockaddr_in);
data_addr.sin.sin_addr.s_addr =
htonl(pack4(addr, 0));
data_addr.sin.sin_port = htons(pack2(port, 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_INET:
error = sscanf(pasv,
"%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(
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
goto bad;
}
if (af != 4 || hal != 4 || pal != 2) {
fputs(
"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_INET;
data_addr.sin.sin_len = sizeof(struct sockaddr_in);
data_addr.sin.sin_addr.s_addr =
htonl(pack4(addr, 0));
data_addr.sin.sin_port = htons(pack2(port, 0));
break;
case AF_INET6:
error = sscanf(pasv,
"%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(
"Passive mode address scan failure. Shouldn't happen!\n", ttyout);
goto bad;
}
if (af != 6 || hal != 16 || pal != 2) {
fputs(
"Passive mode AF mismatch. Shouldn't happen!\n", ttyout);
goto bad;
}
memset(&data_addr, 0, sizeof(data_addr));
data_addr.sin6.sin6_family = AF_INET6;
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));
p32[1] = htonl(pack4(addr, 4));
p32[2] = htonl(pack4(addr, 8));
p32[3] = htonl(pack4(addr, 12));
}
data_addr.sin6.sin6_port = htons(pack2(port, 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]);
} 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_INET) {
on = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on,
sizeof(int)) == -1)
warn("setsockopt TOS (ignored)");
}
return (0);
}
noport:
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_STREAM, 0);
if (data == -1) {
warn("socket");
if (tmpno)
sendport = 1;
return (1);
}
if (!sendport)
if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, (char *)&on,
sizeof(on)) == -1) {
warn("setsockopt (reuse address)");
goto bad;
}
switch (data_addr.sa.sa_family) {
case AF_INET:
on = IP_PORTRANGE_HIGH;
if (setsockopt(data, IPPROTO_IP, IP_PORTRANGE,
(char *)&on, sizeof(on)) == -1)
warn("setsockopt IP_PORTRANGE (ignored)");
break;
case AF_INET6:
on = IPV6_PORTRANGE_HIGH;
if (setsockopt(data, IPPROTO_IPV6, IPV6_PORTRANGE,
(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;
}
#ifndef SMALL
if (options & SO_DEBUG &&
setsockopt(data, SOL_SOCKET, SO_DEBUG, (char *)&on,
sizeof(on)) == -1)
warn("setsockopt (ignored)");
#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");
#define UC(b) (((int)b)&0xff)
if (sendport) {
char hname[NI_MAXHOST], pbuf[NI_MAXSERV];
int af_tmp;
union sockaddr_union tmp;
tmp = data_addr;
switch (tmp.sa.sa_family) {
case AF_INET:
if (!epsv4 || epsv4bad) {
result = COMPLETE +1;
break;
}
/*FALLTHROUGH*/
case AF_INET6:
if (tmp.sa.sa_family == AF_INET6)
tmp.sin6.sin6_scope_id = 0;
af_tmp = (tmp.sa.sa_family == AF_INET) ? 1 : 2;
if (getnameinfo(&tmp.sa, tmp.sa.sa_len, hname,
sizeof(hname), pbuf, sizeof(pbuf),
NI_NUMERICHOST | NI_NUMERICSERV)) {
result = ERROR;
} else {
result = command("EPRT |%d|%s|%s|",
af_tmp, hname, pbuf);
if (result != COMPLETE) {
epsv4bad = 1;
#ifndef SMALL
if (debug) {
fputs(
"disabling epsv4 for this connection\n",
ttyout);
}
#endif /* !SMALL */
}
}
break;
default:
result = COMPLETE + 1;
break;
}
if (result == COMPLETE)
goto skip_port;
switch (data_addr.sa.sa_family) {
case AF_INET:
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]), UC(a[1]), UC(a[2]), UC(a[3]),
UC(p[0]), UC(p[1]));
break;
case AF_INET6:
a = (char *)&data_addr.sin6.sin6_addr;
p = (char *)&data_addr.sin6.sin6_port;
result = command(
"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]),UC(a[1]),UC(a[2]),UC(a[3]),
UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]),
UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]),
UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]),
2, UC(p[0]), UC(p[1]));
break;
default:
result = COMPLETE + 1; /* xxx */
}
skip_port:
if (result == ERROR && sendport == -1) {
sendport = 0;
tmpno = 1;
goto noport;
}
return (result != COMPLETE);
}
if (tmpno)
sendport = 1;
if (data_addr.sa.sa_family == AF_INET) {
on = IPTOS_THROUGHPUT;
if (setsockopt(data, IPPROTO_IP, IP_TOS, (char *)&on,
sizeof(int)) == -1)
warn("setsockopt TOS (ignored)");
}
return (0);
bad:
(void)close(data), data = -1;
if (tmpno)
sendport = 1;
return (1);
}
FILE *
dataconn(const char *lmode)
{
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)close(data);
data = s;
if (from.sa.sa_family == AF_INET) {
int tos = IPTOS_THROUGHPUT;
if (setsockopt(s, IPPROTO_IP, IP_TOS, (char *)&tos,
sizeof(int)) == -1) {
warn("setsockopt TOS (ignored)");
}
}
return (fdopen(data, lmode));
}
void
psummary(int signo)
{
int save_errno = errno;
if (bytes > 0)
ptransfer(1);
errno = save_errno;
}
void
psabort(int signo)
{
alarmtimer(0);
abrtflag++;
}
void
pswitch(int flag)
{
sig_t oldintr;
static struct comvars {
int connect;
char name[HOST_NAME_MAX+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_MAX];
char mo[PATH_MAX];
} proxstruct, tmpstruct;
struct comvars *ip, *op;
abrtflag = 0;
oldintr = signal(SIGINT, 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(SIGINT, oldintr);
if (abrtflag) {
abrtflag = 0;
(*oldintr)(SIGINT);
}
}
void
abortpt(int signo)
{
alarmtimer(0);
putc('\n', ttyout);
(void)fflush(ttyout);
ptabflg++;
mflag = 0;
abrtflag = 0;
longjmp(ptabort, 1);
}
void
proxtrans(const char *cmd, const char *local, const char *remote)
{
volatile sig_t oldintr;
int prox_type, nfnd;
volatile int secndflag;
char * volatile cmd2;
struct pollfd pfd[1];
oldintr = NULL;
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_I;
else
prox_type = TYPE_A;
}
if (curtype != prox_type)
changetype(prox_type, 1);
if (command("PASV") != COMPLETE) {
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) != COMPLETE) {
pswitch(1);
return;
}
if (setjmp(ptabort))
goto abort;
oldintr = signal(SIGINT, abortpt);
if (command("%s %s", cmd, remote) != PRELIM) {
(void)signal(SIGINT, oldintr);
pswitch(1);
return;
}
sleep(2);
pswitch(1);
secndflag++;
if (command("%s %s", cmd2, local) != PRELIM)
goto abort;
ptflag++;
(void)getreply(0);
pswitch(0);
(void)getreply(0);
(void)signal(SIGINT, oldintr);
pswitch(1);
ptflag = 0;
fprintf(ttyout, "local: %s remote: %s\n", local, remote);
return;
abort:
(void)signal(SIGINT, SIG_IGN);
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) != PRELIM) {
pswitch(0);
if (cpend)
abort_remote(NULL);
}
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT, oldintr);
return;
}
if (cpend)
abort_remote(NULL);
pswitch(!proxy);
if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM) {
pswitch(0);
if (cpend)
abort_remote(NULL);
pswitch(1);
if (ptabflg)
code = -1;
(void)signal(SIGINT, oldintr);
return;
}
}
if (cpend)
abort_remote(NULL);
pswitch(!proxy);
if (cpend) {
pfd[0].fd = fileno(cin);
pfd[0].events = POLLIN;
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(SIGINT, oldintr);
}
#ifndef SMALL
void
reset(int argc, char *argv[])
{
struct pollfd pfd[1];
int nfnd = 1;
pfd[0].fd = fileno(cin);
pfd[0].events = POLLIN;
while (nfnd > 0) {
if ((nfnd = poll(pfd, 1, 0)) == -1) {
warn("reset");
code = -1;
lostpeer();
} else if (nfnd) {
(void)getreply(0);
}
}
}
#endif
char *
gunique(const char *local)
{
static char new[PATH_MAX];
char *cp = strrchr(local, '/');
int d, count=0;
char ext = '1';
if (cp)
*cp = '\0';
d = access(cp == local ? "/" : cp ? local : ".", W_OK);
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_OK)) == -1)
break;
if (ext != '0')
cp--;
else if (*(cp - 2) == '.')
*(cp - 1) = '1';
else {
*(cp - 2) = *(cp - 2) + 1;
cp--;
}
}
return (new);
}
jmp_buf forceabort;
static void
abortforce(int signo)
{
int save_errno = errno;
#define MSG "Forced abort. The connection will be closed.\n"
(void) write(fileno(ttyout), MSG, strlen(MSG));
#undef MSG
errno = save_errno;
longjmp(forceabort, 1);
}
void
abort_remote(FILE *din)
{
char buf[BUFSIZ];
nfds_t nfds;
int nfnd;
struct pollfd pfd[2];
sig_t oldintr;
if (cout == NULL || setjmp(forceabort)) {
if (cout)
fclose(cout);
warnx("Lost control connection for abort.");
if (ptabflg)
code = -1;
lostpeer();
return;
}
oldintr = signal(SIGINT, 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", IAC, IP, IAC);
if (send(fileno(cout), buf, 3, MSG_OOB) != 3)
warn("abort");
fprintf(cout, "%cABOR\r\n", DM);
(void)fflush(cout);
pfd[0].fd = fileno(cin);
pfd[0].events = POLLIN;
nfds = 1;
if (din) {
pfd[1].fd = fileno(din);
pfd[1].events = POLLIN;
nfds++;
}
if ((nfnd = poll(pfd, nfds, 10 * 1000)) <= 0) {
if (nfnd == -1)
warn("abort");
if (ptabflg)
code = -1;
lostpeer();
}
if (din && (pfd[1].revents & POLLIN)) {
while (read(fileno(din), buf, BUFSIZ) > 0)
/* LOOP */;
}
if (getreply(0) == ERROR && code == 552) {
/* 552 needed for nic style abort */
(void)getreply(0);
}
(void)getreply(0);
(void)signal(SIGINT, oldintr);
}
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