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30b87b0633f41170ff27dc458cac881c99411f53
heimdal/appl/ftp/ftp/ftp.c
Love Hornquist Astrand 30b87b0633 Dont look too careful on local [CID-23]
2009-07-30 14:16:20 +02:00

1815 lines
38 KiB
C
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/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 "ftp_locl.h"
RCSID ("$Id$");
struct sockaddr_storage hisctladdr_ss;
struct sockaddr *hisctladdr = (struct sockaddr *)&hisctladdr_ss;
struct sockaddr_storage data_addr_ss;
struct sockaddr *data_addr = (struct sockaddr *)&data_addr_ss;
struct sockaddr_storage myctladdr_ss;
struct sockaddr *myctladdr = (struct sockaddr *)&myctladdr_ss;
int data = -1;
int abrtflag = 0;
jmp_buf ptabort;
int ptabflg;
int ptflag = 0;
off_t restart_point = 0;
FILE *cin, *cout;
typedef void (*sighand) (int);
char *
hookup (const char *host, int port)
{
static char hostnamebuf[MaxHostNameLen];
struct addrinfo *ai, *a;
struct addrinfo hints;
int error;
char portstr[NI_MAXSERV];
socklen_t len;
int s;
memset (&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
hints.ai_flags = AI_CANONNAME;
snprintf (portstr, sizeof(portstr), "%u", ntohs(port));
error = getaddrinfo (host, portstr, &hints, &ai);
if (error) {
warnx ("%s: %s", host, gai_strerror(error));
code = -1;
return NULL;
}
strlcpy (hostnamebuf, host, sizeof(hostnamebuf));
hostname = hostnamebuf;
s = -1;
for (a = ai; a != NULL; a = a->ai_next) {
s = socket (a->ai_family, a->ai_socktype, a->ai_protocol);
if (s < 0)
continue;
if (a->ai_canonname != NULL)
strlcpy (hostnamebuf, a->ai_canonname, sizeof(hostnamebuf));
memcpy (hisctladdr, a->ai_addr, a->ai_addrlen);
error = connect (s, a->ai_addr, a->ai_addrlen);
if (error < 0) {
char addrstr[256];
if (getnameinfo (a->ai_addr, a->ai_addrlen,
addrstr, sizeof(addrstr),
NULL, 0, NI_NUMERICHOST) != 0)
strlcpy (addrstr, "unknown address", sizeof(addrstr));
warn ("connect %s", addrstr);
close (s);
s = -1;
continue;
}
break;
}
freeaddrinfo (ai);
if (s < 0) {
warnx ("failed to contact %s", host);
code = -1;
return NULL;
}
len = sizeof(myctladdr_ss);
if (getsockname (s, myctladdr, &len) < 0) {
warn ("getsockname");
code = -1;
close (s);
return NULL;
}
#ifdef IPTOS_LOWDELAY
socket_set_tos (s, IPTOS_LOWDELAY);
#endif
cin = fdopen (s, "r");
cout = fdopen (s, "w");
if (cin == NULL || cout == NULL) {
warnx ("fdopen failed.");
if (cin)
fclose (cin);
if (cout)
fclose (cout);
code = -1;
goto bad;
}
if (verbose)
printf ("Connected to %s.\n", hostname);
if (getreply (0) > 2) { /* read startup message from server */
if (cin)
fclose (cin);
if (cout)
fclose (cout);
code = -1;
goto bad;
}
#if defined(SO_OOBINLINE) && defined(HAVE_SETSOCKOPT)
{
int on = 1;
if (setsockopt (s, SOL_SOCKET, SO_OOBINLINE, (char *) &on, sizeof (on))
< 0 && debug) {
warn ("setsockopt");
}
}
#endif /* SO_OOBINLINE */
return (hostname);
bad:
close (s);
return NULL;
}
int
login (char *host)
{
char tmp[80];
char defaultpass[128];
char *userstr, *pass, *acctstr;
char *ruserstr, *rpass, *racctstr;
int n, aflag = 0;
char *myname = NULL;
struct passwd *pw = k_getpwuid(getuid());
if (pw != NULL)
myname = pw->pw_name;
ruserstr = rpass = racctstr = NULL;
if(sec_login(host))
printf("\n*** Using plaintext user and password ***\n\n");
else{
printf("Authentication successful.\n\n");
}
if (ruserpassword (host, &ruserstr, &rpass, &racctstr) < 0) {
code = -1;
return (0);
}
userstr = ruserstr;
pass = rpass;
acctstr = racctstr;
while (userstr == NULL) {
if (myname)
printf ("Name (%s:%s): ", host, myname);
else
printf ("Name (%s): ", host);
*tmp = '\0';
if (fgets (tmp, sizeof (tmp) - 1, stdin) != NULL)
tmp[strlen (tmp) - 1] = '\0';
if (*tmp == '\0')
userstr = myname;
else
userstr = tmp;
}
strlcpy(username, userstr, sizeof(username));
if (ruserstr)
free(ruserstr);
n = command("USER %s", userstr);
if (n == COMPLETE)
n = command("PASS dummy"); /* DK: Compatibility with gssftp daemon */
else if(n == CONTINUE) {
if (pass == NULL) {
char prompt[128];
if(myname &&
(!strcmp(userstr, "ftp") || !strcmp(userstr, "anonymous"))) {
snprintf(defaultpass, sizeof(defaultpass),
"%s@%s", myname, mydomain);
snprintf(prompt, sizeof(prompt),
"Password (%s): ", defaultpass);
} else if (sec_complete) {
pass = myname;
} else {
*defaultpass = '\0';
snprintf(prompt, sizeof(prompt), "Password: ");
}
if (pass == NULL) {
pass = defaultpass;
UI_UTIL_read_pw_string (tmp, sizeof (tmp), prompt, 0);
if (tmp[0])
pass = tmp;
}
}
n = command ("PASS %s", pass);
if (rpass)
free(rpass);
}
if (n == CONTINUE) {
aflag++;
UI_UTIL_read_pw_string (tmp, sizeof(tmp), "Account:", 0);
acctstr = tmp;
n = command ("ACCT %s", acctstr);
}
if (n != COMPLETE) {
if (racctstr)
free(racctstr);
warnx ("Login failed.");
return (0);
}
if (!aflag && acctstr != NULL)
command ("ACCT %s", acctstr);
if (racctstr)
free(racctstr);
if (proxy)
return (1);
for (n = 0; n < macnum; ++n) {
if (!strcmp("init", macros[n].mac_name)) {
strlcpy (line, "$init", sizeof (line));
makeargv();
domacro(margc, margv);
break;
}
}
sec_set_protection_level ();
return (1);
}
void
cmdabort (int sig)
{
printf ("\n");
fflush (stdout);
abrtflag++;
if (ptflag)
longjmp (ptabort, 1);
}
int
command (char *fmt,...)
{
va_list ap;
int r;
sighand oldintr;
abrtflag = 0;
if (cout == NULL) {
warn ("No control connection for command");
code = -1;
return (0);
}
oldintr = signal(SIGINT, cmdabort);
if(debug){
printf("---> ");
if (strncmp("PASS ", fmt, 5) == 0)
printf("PASS XXXX");
else {
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
va_end(ap);
}
}
va_start(ap, fmt);
sec_vfprintf(cout, fmt, ap);
va_end(ap);
if(debug){
printf("\n");
fflush(stdout);
}
fprintf (cout, "\r\n");
fflush (cout);
cpend = 1;
r = getreply (!strcmp (fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN)
(*oldintr) (SIGINT);
signal (SIGINT, oldintr);
return (r);
}
char reply_string[BUFSIZ]; /* last line of previous reply */
int
getreply (int expecteof)
{
char *p;
char *lead_string;
int c;
struct sigaction sa, osa;
char buf[8192];
int reply_code;
int long_warn = 0;
sigemptyset (&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = cmdabort;
sigaction (SIGINT, &sa, &osa);
p = buf;
reply_code = 0;
while (1) {
c = getc (cin);
switch (c) {
case EOF:
if (expecteof) {
sigaction (SIGINT, &osa, NULL);
code = 221;
return 0;
}
lostpeer (0);
if (verbose) {
printf ("421 Service not available, "
"remote server has closed connection\n");
fflush (stdout);
}
code = 421;
return (4);
case IAC:
c = getc (cin);
if (c == WILL || c == WONT)
fprintf (cout, "%c%c%c", IAC, DONT, getc (cin));
if (c == DO || c == DONT)
fprintf (cout, "%c%c%c", IAC, WONT, getc (cin));
continue;
case '\n':
*p++ = '\0';
if(isdigit((unsigned char)buf[0])){
sscanf(buf, "%d", &code);
if(code == 631){
code = 0;
sec_read_msg(buf, prot_safe);
sscanf(buf, "%d", &code);
lead_string = "S:";
} else if(code == 632){
code = 0;
sec_read_msg(buf, prot_private);
sscanf(buf, "%d", &code);
lead_string = "P:";
}else if(code == 633){
code = 0;
sec_read_msg(buf, prot_confidential);
sscanf(buf, "%d", &code);
lead_string = "C:";
}else if(sec_complete)
lead_string = "!!";
else
lead_string = "";
if(code != 0 && reply_code == 0)
reply_code = code;
if (verbose > 0 || (verbose > -1 && code > 499))
fprintf (stdout, "%s%s\n", lead_string, buf);
if (code == reply_code && buf[3] == ' ') {
strlcpy (reply_string, buf, sizeof(reply_string));
if (code >= 200)
cpend = 0;
sigaction (SIGINT, &osa, NULL);
if (code == 421)
lostpeer (0);
#if 1
if (abrtflag &&
osa.sa_handler != cmdabort &&
osa.sa_handler != SIG_IGN)
osa.sa_handler (SIGINT);
#endif
if (code == 227 || code == 229) {
char *q;
q = strchr (reply_string, '(');
if (q) {
q++;
strlcpy(pasv, q, sizeof(pasv));
q = strrchr(pasv, ')');
if (q)
*q = '\0';
}
}
return code / 100;
}
}else{
if(verbose > 0 || (verbose > -1 && code > 499)){
if(sec_complete)
fprintf(stdout, "!!");
fprintf(stdout, "%s\n", buf);
}
}
p = buf;
long_warn = 0;
continue;
default:
if(p < buf + sizeof(buf) - 1)
*p++ = c;
else if(long_warn == 0) {
fprintf(stderr, "WARNING: incredibly long line received\n");
long_warn = 1;
}
}
}
}
#if 0
int
getreply (int expecteof)
{
int c, n;
int dig;
int originalcode = 0, continuation = 0;
sighand oldintr;
int pflag = 0;
char *cp, *pt = pasv;
oldintr = signal (SIGINT, cmdabort);
for (;;) {
dig = n = code = 0;
cp = reply_string;
while ((c = getc (cin)) != '\n') {
if (c == IAC) { /* handle telnet commands */
switch (c = getc (cin)) {
case WILL:
case WONT:
c = getc (cin);
fprintf (cout, "%c%c%c", IAC, DONT, c);
fflush (cout);
break;
case DO:
case DONT:
c = getc (cin);
fprintf (cout, "%c%c%c", IAC, WONT, c);
fflush (cout);
break;
default:
break;
}
continue;
}
dig++;
if (c == EOF) {
if (expecteof) {
signal (SIGINT, oldintr);
code = 221;
return (0);
}
lostpeer (0);
if (verbose) {
printf ("421 Service not available, remote server has closed connection\n");
fflush (stdout);
}
code = 421;
return (4);
}
if (c != '\r' && (verbose > 0 ||
(verbose > -1 && n == '5' && dig > 4))) {
if (proxflag &&
(dig == 1 || dig == 5 && verbose == 0))
printf ("%s:", hostname);
putchar (c);
}
if (dig < 4 && isdigit (c))
code = code * 10 + (c - '0');
if (!pflag && code == 227)
pflag = 1;
if (dig > 4 && pflag == 1 && isdigit (c))
pflag = 2;
if (pflag == 2) {
if (c != '\r' && c != ')')
*pt++ = c;
else {
*pt = '\0';
pflag = 3;
}
}
if (dig == 4 && c == '-') {
if (continuation)
code = 0;
continuation++;
}
if (n == 0)
n = c;
if (cp < &reply_string[sizeof (reply_string) - 1])
*cp++ = c;
}
if (verbose > 0 || verbose > -1 && n == '5') {
putchar (c);
fflush (stdout);
}
if (continuation && code != originalcode) {
if (originalcode == 0)
originalcode = code;
continue;
}
*cp = '\0';
if(sec_complete){
if(code == 631)
sec_read_msg(reply_string, prot_safe);
else if(code == 632)
sec_read_msg(reply_string, prot_private);
else if(code == 633)
sec_read_msg(reply_string, prot_confidential);
n = code / 100 + '0';
}
if (n != '1')
cpend = 0;
signal (SIGINT, oldintr);
if (code == 421 || originalcode == 421)
lostpeer (0);
if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN)
(*oldintr) (SIGINT);
return (n - '0');
}
}
#endif
int
empty (fd_set * mask, int sec)
{
struct timeval t;
t.tv_sec = sec;
t.tv_usec = 0;
return (select (FD_SETSIZE, mask, NULL, NULL, &t));
}
jmp_buf sendabort;
static RETSIGTYPE
abortsend (int sig)
{
mflag = 0;
abrtflag = 0;
printf ("\nsend aborted\nwaiting for remote to finish abort\n");
fflush (stdout);
longjmp (sendabort, 1);
}
#define HASHBYTES 1024
static int
copy_stream (FILE * from, FILE * to)
{
static size_t bufsize;
static char *buf;
int n;
int bytes = 0;
int werr = 0;
int hashbytes = HASHBYTES;
struct stat st;
#if defined(HAVE_MMAP) && !defined(NO_MMAP)
void *chunk;
size_t off;
#define BLOCKSIZE (1024 * 1024 * 10)
#ifndef MAP_FAILED
#define MAP_FAILED (-1)
#endif
if (fstat (fileno (from), &st) == 0 && S_ISREG (st.st_mode)) {
/*
* mmap zero bytes has potential of loosing, don't do it.
*/
if (st.st_size == 0)
return 0;
off = 0;
while (off != st.st_size) {
size_t len;
ssize_t res;
len = st.st_size - off;
if (len > BLOCKSIZE)
len = BLOCKSIZE;
chunk = mmap (0, len, PROT_READ, MAP_SHARED, fileno (from), off);
if (chunk == (void *) MAP_FAILED) {
if (off == 0) /* try read if mmap doesn't work */
goto try_read;
break;
}
res = sec_write (fileno (to), chunk, len);
if (msync (chunk, len, MS_ASYNC))
warn ("msync");
if (munmap (chunk, len) < 0)
warn ("munmap");
sec_fflush (to);
if (res != len)
return off;
off += len;
}
return off;
}
try_read:
#endif
buf = alloc_buffer (buf, &bufsize,
fstat (fileno (from), &st) >= 0 ? &st : NULL);
if (buf == NULL)
return -1;
while ((n = read (fileno (from), buf, bufsize)) > 0) {
werr = sec_write (fileno (to), buf, n);
if (werr < 0)
break;
bytes += werr;
while (hash && bytes > hashbytes) {
putchar ('#');
hashbytes += HASHBYTES;
}
}
sec_fflush (to);
if (n < 0)
warn ("local");
if (werr < 0) {
if (errno != EPIPE)
warn ("netout");
bytes = -1;
}
return bytes;
}
void
sendrequest (char *cmd, char *local, char *remote, char *lmode, int printnames)
{
struct stat st;
struct timeval start, stop;
int c, d;
FILE *fin, *dout = 0;
int (*closefunc) (FILE *);
RETSIGTYPE (*oldintr)(int), (*oldintp)(int);
long bytes = 0, hashbytes = HASHBYTES;
char *rmode = "w";
if (verbose && printnames) {
if (local && strcmp (local, "-") != 0)
printf ("local: %s ", local);
if (remote)
printf ("remote: %s\n", remote);
}
if (proxy) {
proxtrans (cmd, local, remote);
return;
}
if (curtype != type)
changetype (type, 0);
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
if (setjmp (sendabort)) {
while (cpend) {
getreply (0);
}
if (data >= 0) {
close (data);
data = -1;
}
if (oldintr)
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
code = -1;
return;
}
oldintr = signal (SIGINT, abortsend);
if (strcmp (local, "-") == 0)
fin = stdin;
else if (*local == '|') {
oldintp = signal (SIGPIPE, SIG_IGN);
fin = popen (local + 1, lmode);
if (fin == NULL) {
warn ("%s", local + 1);
signal (SIGINT, oldintr);
signal (SIGPIPE, oldintp);
code = -1;
return;
}
closefunc = pclose;
} else {
fin = fopen (local, lmode);
if (fin == NULL) {
warn ("local: %s", local);
signal (SIGINT, oldintr);
code = -1;
return;
}
closefunc = fclose;
if (fstat (fileno (fin), &st) < 0 || !S_ISREG(st.st_mode)) {
fprintf (stdout, "%s: not a plain file.\n", local);
signal (SIGINT, oldintr);
fclose (fin);
code = -1;
return;
}
}
if (initconn ()) {
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
code = -1;
if (closefunc != NULL)
(*closefunc) (fin);
return;
}
if (setjmp (sendabort))
goto abort;
if (restart_point &&
(strcmp (cmd, "STOR") == 0 || strcmp (cmd, "APPE") == 0)) {
int rc;
switch (curtype) {
case TYPE_A:
rc = fseek (fin, (long) restart_point, SEEK_SET);
break;
case TYPE_I:
case TYPE_L:
rc = lseek (fileno (fin), restart_point, SEEK_SET);
break;
default:
abort();
}
if (rc < 0) {
warn ("local: %s", local);
restart_point = 0;
if (closefunc != NULL)
(*closefunc) (fin);
return;
}
if (command ("REST %ld", (long) restart_point)
!= CONTINUE) {
restart_point = 0;
if (closefunc != NULL)
(*closefunc) (fin);
return;
}
restart_point = 0;
rmode = "r+w";
}
if (remote) {
if (command ("%s %s", cmd, remote) != PRELIM) {
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc) (fin);
return;
}
} else if (command ("%s", cmd) != PRELIM) {
signal(SIGINT, oldintr);
if (oldintp)
signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
dout = dataconn(rmode);
if (dout == NULL)
goto abort;
set_buffer_size (fileno (dout), 0);
gettimeofday (&start, (struct timezone *) 0);
oldintp = signal (SIGPIPE, SIG_IGN);
switch (curtype) {
case TYPE_I:
case TYPE_L:
errno = d = c = 0;
bytes = copy_stream (fin, dout);
break;
case TYPE_A:
while ((c = getc (fin)) != EOF) {
if (c == '\n') {
while (hash && (bytes >= hashbytes)) {
putchar ('#');
fflush (stdout);
hashbytes += HASHBYTES;
}
if (ferror (dout))
break;
sec_putc ('\r', dout);
bytes++;
}
sec_putc (c, dout);
bytes++;
}
sec_fflush (dout);
if (hash) {
if (bytes < hashbytes)
putchar ('#');
putchar ('\n');
fflush (stdout);
}
if (ferror (fin))
warn ("local: %s", local);
if (ferror (dout)) {
if (errno != EPIPE)
warn ("netout");
bytes = -1;
}
break;
}
if (closefunc != NULL)
(*closefunc) (fin);
fclose (dout);
gettimeofday (&stop, (struct timezone *) 0);
getreply (0);
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
if (bytes > 0)
ptransfer ("sent", bytes, &start, &stop);
return;
abort:
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
if (!cpend) {
code = -1;
return;
}
if (data >= 0) {
close (data);
data = -1;
}
if (dout)
fclose (dout);
getreply (0);
code = -1;
if (closefunc != NULL && fin != NULL)
(*closefunc) (fin);
gettimeofday (&stop, (struct timezone *) 0);
if (bytes > 0)
ptransfer ("sent", bytes, &start, &stop);
}
jmp_buf recvabort;
void
abortrecv (int sig)
{
mflag = 0;
abrtflag = 0;
printf ("\nreceive aborted\nwaiting for remote to finish abort\n");
fflush (stdout);
longjmp (recvabort, 1);
}
void
recvrequest (char *cmd, char *local, char *remote,
char *lmode, int printnames, int local_given)
{
FILE *fout = NULL, *din = NULL;
int (*closefunc) (FILE *);
sighand oldintr, oldintp;
int c, d, is_retr, tcrflag, bare_lfs = 0;
static size_t bufsize;
static char *buf;
long bytes = 0, hashbytes = HASHBYTES;
struct timeval start, stop;
struct stat st;
is_retr = strcmp (cmd, "RETR") == 0;
if (is_retr && verbose && printnames) {
if (local && strcmp (local, "-") != 0)
printf ("local: %s ", local);
if (remote)
printf ("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) {
getreply (0);
}
if (data >= 0) {
close (data);
data = -1;
}
if (oldintr)
signal (SIGINT, oldintr);
code = -1;
return;
}
oldintr = signal (SIGINT, abortrecv);
if (!local_given || (local && (strcmp(local, "-") && *local != '|'))) {
if (access (local, 2) < 0) {
char *dir = strrchr (local, '/');
if (errno != ENOENT && errno != EACCES) {
warn ("local: %s", local);
signal (SIGINT, oldintr);
code = -1;
return;
}
if (dir != NULL)
*dir = 0;
d = access (dir ? local : ".", 2);
if (dir != NULL)
*dir = '/';
if (d < 0) {
warn ("local: %s", local);
signal (SIGINT, oldintr);
code = -1;
return;
}
if (!runique && errno == EACCES &&
chmod (local, 0600) < 0) {
warn ("local: %s", local);
signal (SIGINT, oldintr);
signal (SIGINT, oldintr);
code = -1;
return;
}
if (runique && errno == EACCES &&
(local = gunique (local)) == NULL) {
signal (SIGINT, oldintr);
code = -1;
return;
}
} else if (runique && (local = gunique (local)) == NULL) {
signal(SIGINT, oldintr);
code = -1;
return;
}
}
if (!is_retr) {
if (curtype != TYPE_A)
changetype (TYPE_A, 0);
} else if (curtype != type)
changetype (type, 0);
if (initconn ()) {
signal (SIGINT, oldintr);
code = -1;
return;
}
if (setjmp (recvabort))
goto abort;
if (is_retr && restart_point &&
command ("REST %ld", (long) restart_point) != CONTINUE)
return;
if (remote) {
if (command ("%s %s", cmd, remote) != PRELIM) {
signal (SIGINT, oldintr);
return;
}
} else {
if (command ("%s", cmd) != PRELIM) {
signal (SIGINT, oldintr);
return;
}
}
din = dataconn ("r");
if (din == NULL)
goto abort;
set_buffer_size (fileno (din), 1);
if (local_given && strcmp (local, "-") == 0)
fout = stdout;
else if (local_given && *local == '|') {
oldintp = signal (SIGPIPE, SIG_IGN);
fout = popen (local + 1, "w");
if (fout == NULL) {
warn ("%s", local + 1);
goto abort;
}
closefunc = pclose;
} else {
fout = fopen (local, lmode);
if (fout == NULL) {
warn ("local: %s", local);
goto abort;
}
closefunc = fclose;
}
buf = alloc_buffer (buf, &bufsize,
fstat (fileno (fout), &st) >= 0 ? &st : NULL);
if (buf == NULL)
goto abort;
gettimeofday (&start, (struct timezone *) 0);
switch (curtype) {
case TYPE_I:
case TYPE_L:
if (restart_point &&
lseek (fileno (fout), restart_point, SEEK_SET) < 0) {
warn ("local: %s", local);
if (closefunc != NULL)
(*closefunc) (fout);
return;
}
errno = d = 0;
while ((c = sec_read (fileno (din), buf, bufsize)) > 0) {
if ((d = write (fileno (fout), buf, c)) != c)
break;
bytes += c;
if (hash) {
while (bytes >= hashbytes) {
putchar ('#');
hashbytes += HASHBYTES;
}
fflush (stdout);
}
}
if (hash && bytes > 0) {
if (bytes < HASHBYTES)
putchar ('#');
putchar ('\n');
fflush (stdout);
}
if (c < 0) {
if (errno != EPIPE)
warn ("netin");
bytes = -1;
}
if (d < c) {
if (d < 0)
warn ("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) < 0)
goto done;
n = restart_point;
for (i = 0; i++ < n;) {
if ((ch = sec_getc (fout)) == EOF)
goto done;
if (ch == '\n')
i++;
}
if (fseek (fout, 0L, SEEK_CUR) < 0) {
done:
warn ("local: %s", local);
if (closefunc != NULL)
(*closefunc) (fout);
return;
}
}
while ((c = sec_getc(din)) != EOF) {
if (c == '\n')
bare_lfs++;
while (c == '\r') {
while (hash && (bytes >= hashbytes)) {
putchar ('#');
fflush (stdout);
hashbytes += HASHBYTES;
}
bytes++;
if ((c = sec_getc (din)) != '\n' || tcrflag) {
if (ferror (fout))
goto break2;
putc ('\r', fout);
if (c == '\0') {
bytes++;
goto contin2;
}
if (c == EOF)
goto contin2;
}
}
putc (c, fout);
bytes++;
contin2:;
}
break2:
if (bare_lfs) {
printf ("WARNING! %d bare linefeeds received in ASCII mode\n",
bare_lfs);
printf ("File may not have transferred correctly.\n");
}
if (hash) {
if (bytes < hashbytes)
putchar ('#');
putchar ('\n');
fflush (stdout);
}
if (ferror (din)) {
if (errno != EPIPE)
warn ("netin");
bytes = -1;
}
if (ferror (fout))
warn ("local: %s", local);
break;
}
if (closefunc != NULL)
(*closefunc) (fout);
signal (SIGINT, oldintr);
if (oldintp)
signal (SIGPIPE, oldintp);
fclose (din);
gettimeofday (&stop, (struct timezone *) 0);
getreply (0);
if (bytes > 0 && is_retr)
ptransfer ("received", bytes, &start, &stop);
return;
abort:
/* abort using RFC959 recommended IP,SYNC sequence */
if (oldintp)
signal (SIGPIPE, oldintr);
signal (SIGINT, SIG_IGN);
if (!cpend) {
code = -1;
signal (SIGINT, oldintr);
return;
}
abort_remote(din);
code = -1;
if (data >= 0) {
close (data);
data = -1;
}
if (closefunc != NULL && fout != NULL)
(*closefunc) (fout);
if (din)
fclose (din);
gettimeofday (&stop, (struct timezone *) 0);
if (bytes > 0)
ptransfer ("received", bytes, &start, &stop);
signal (SIGINT, oldintr);
}
static int
parse_epsv (const char *str)
{
char sep;
char *end;
int port;
if (*str == '\0')
return -1;
sep = *str++;
if (sep != *str++)
return -1;
if (sep != *str++)
return -1;
port = strtol (str, &end, 0);
if (str == end)
return -1;
if (end[0] != sep || end[1] != '\0')
return -1;
return htons(port);
}
static int
parse_pasv (struct sockaddr_in *sin4, const char *str)
{
int a0, a1, a2, a3, p0, p1;
/*
* What we've got at this point is a string of comma separated
* one-byte unsigned integer values. The first four are the an IP
* address. The fifth is the MSB of the port number, the sixth is the
* LSB. From that we'll prepare a sockaddr_in.
*/
if (sscanf (str, "%d,%d,%d,%d,%d,%d",
&a0, &a1, &a2, &a3, &p0, &p1) != 6) {
printf ("Passive mode address scan failure. "
"Shouldn't happen!\n");
return -1;
}
if (a0 < 0 || a0 > 255 ||
a1 < 0 || a1 > 255 ||
a2 < 0 || a2 > 255 ||
a3 < 0 || a3 > 255 ||
p0 < 0 || p0 > 255 ||
p1 < 0 || p1 > 255) {
printf ("Can't parse passive mode string.\n");
return -1;
}
memset (sin4, 0, sizeof(*sin4));
sin4->sin_family = AF_INET;
sin4->sin_addr.s_addr = htonl ((a0 << 24) | (a1 << 16) |
(a2 << 8) | a3);
sin4->sin_port = htons ((p0 << 8) | p1);
return 0;
}
static int
passive_mode (void)
{
int port;
data = socket (myctladdr->sa_family, SOCK_STREAM, 0);
if (data < 0) {
warn ("socket");
return (1);
}
if (options & SO_DEBUG)
socket_set_debug (data);
if (command ("EPSV") != COMPLETE) {
if (command ("PASV") != COMPLETE) {
printf ("Passive mode refused.\n");
goto bad;
}
}
/*
* Parse the reply to EPSV or PASV
*/
port = parse_epsv (pasv);
if (port > 0) {
data_addr->sa_family = myctladdr->sa_family;
socket_set_address_and_port (data_addr,
socket_get_address (hisctladdr),
port);
} else {
if (parse_pasv ((struct sockaddr_in *)data_addr, pasv) < 0)
goto bad;
}
if (connect (data, data_addr, socket_sockaddr_size (data_addr)) < 0) {
warn ("connect");
goto bad;
}
#ifdef IPTOS_THROUGHPUT
socket_set_tos (data, IPTOS_THROUGHPUT);
#endif
return (0);
bad:
close (data);
data = -1;
sendport = 1;
return (1);
}
static int
active_mode (void)
{
int tmpno = 0;
socklen_t len;
int result;
noport:
data_addr->sa_family = myctladdr->sa_family;
socket_set_address_and_port (data_addr, socket_get_address (myctladdr),
sendport ? 0 : socket_get_port (myctladdr));
if (data != -1)
close (data);
data = socket (data_addr->sa_family, SOCK_STREAM, 0);
if (data < 0) {
warn ("socket");
if (tmpno)
sendport = 1;
return (1);
}
if (!sendport)
socket_set_reuseaddr (data, 1);
if (bind (data, data_addr, socket_sockaddr_size (data_addr)) < 0) {
warn ("bind");
goto bad;
}
if (options & SO_DEBUG)
socket_set_debug (data);
len = sizeof (data_addr_ss);
if (getsockname (data, data_addr, &len) < 0) {
warn ("getsockname");
goto bad;
}
if (listen (data, 1) < 0)
warn ("listen");
if (sendport) {
char addr_str[256];
int inet_af;
int overbose;
if (inet_ntop (data_addr->sa_family, socket_get_address (data_addr),
addr_str, sizeof(addr_str)) == NULL)
errx (1, "inet_ntop failed");
switch (data_addr->sa_family) {
case AF_INET :
inet_af = 1;
break;
#ifdef HAVE_IPV6
case AF_INET6 :
inet_af = 2;
break;
#endif
default :
errx (1, "bad address family %d", data_addr->sa_family);
}
overbose = verbose;
if (debug == 0)
verbose = -1;
result = command ("EPRT |%d|%s|%d|",
inet_af, addr_str,
ntohs(socket_get_port (data_addr)));
verbose = overbose;
if (result == ERROR) {
struct sockaddr_in *sin4 = (struct sockaddr_in *)data_addr;
unsigned int a = ntohl(sin4->sin_addr.s_addr);
unsigned int p = ntohs(sin4->sin_port);
if (data_addr->sa_family != AF_INET) {
warnx ("remote server doesn't support EPRT");
goto bad;
}
result = command("PORT %d,%d,%d,%d,%d,%d",
(a >> 24) & 0xff,
(a >> 16) & 0xff,
(a >> 8) & 0xff,
a & 0xff,
(p >> 8) & 0xff,
p & 0xff);
if (result == ERROR && sendport == -1) {
sendport = 0;
tmpno = 1;
goto noport;
}
return (result != COMPLETE);
}
return result != COMPLETE;
}
if (tmpno)
sendport = 1;
#ifdef IPTOS_THROUGHPUT
socket_set_tos (data, IPTOS_THROUGHPUT);
#endif
return (0);
bad:
close (data);
data = -1;
if (tmpno)
sendport = 1;
return (1);
}
/*
* Need to start a listen on the data channel before we send the command,
* otherwise the server's connect may fail.
*/
int
initconn (void)
{
if (passivemode)
return passive_mode ();
else
return active_mode ();
}
FILE *
dataconn (const char *lmode)
{
struct sockaddr_storage from_ss;
struct sockaddr *from = (struct sockaddr *)&from_ss;
socklen_t fromlen = sizeof(from_ss);
int s;
if (passivemode)
return (fdopen (data, lmode));
s = accept (data, from, &fromlen);
if (s < 0) {
warn ("accept");
close (data), data = -1;
return (NULL);
}
close (data);
data = s;
#ifdef IPTOS_THROUGHPUT
socket_set_tos (s, IPTOS_THROUGHPUT);
#endif
return (fdopen (data, lmode));
}
void
ptransfer (char *direction, long int bytes,
struct timeval * t0, struct timeval * t1)
{
struct timeval td;
float s;
float bs;
int prec;
char *unit;
if (verbose) {
td.tv_sec = t1->tv_sec - t0->tv_sec;
td.tv_usec = t1->tv_usec - t0->tv_usec;
if (td.tv_usec < 0) {
td.tv_sec--;
td.tv_usec += 1000000;
}
s = td.tv_sec + (td.tv_usec / 1000000.);
bs = bytes / (s ? s : 1);
if (bs >= 1048576) {
bs /= 1048576;
unit = "M";
prec = 2;
} else if (bs >= 1024) {
bs /= 1024;
unit = "k";
prec = 1;
} else {
unit = "";
prec = 0;
}
printf ("%ld bytes %s in %.3g seconds (%.*f %sbyte/s)\n",
bytes, direction, s, prec, bs, unit);
}
}
void
psabort (int sig)
{
abrtflag++;
}
void
pswitch (int flag)
{
sighand oldintr;
static struct comvars {
int connect;
char name[MaxHostNameLen];
struct sockaddr_storage mctl;
struct sockaddr_storage 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[MaxPathLen];
char mo[MaxPathLen];
} 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) {
strlcpy (ip->name, hostname, sizeof (ip->name));
} else
ip->name[0] = 0;
hostname = op->name;
ip->hctl = hisctladdr_ss;
hisctladdr_ss = op->hctl;
ip->mctl = myctladdr_ss;
myctladdr_ss = 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;
strlcpy (ip->nti, ntin, sizeof (ip->nti));
strlcpy (ntin, op->nti, 17);
strlcpy (ip->nto, ntout, sizeof (ip->nto));
strlcpy (ntout, op->nto, 17);
ip->mapflg = mapflag;
mapflag = op->mapflg;
strlcpy (ip->mi, mapin, MaxPathLen);
strlcpy (mapin, op->mi, MaxPathLen);
strlcpy (ip->mo, mapout, MaxPathLen);
strlcpy (mapout, op->mo, MaxPathLen);
signal(SIGINT, oldintr);
if (abrtflag) {
abrtflag = 0;
(*oldintr) (SIGINT);
}
}
void
abortpt (int sig)
{
printf ("\n");
fflush (stdout);
ptabflg++;
mflag = 0;
abrtflag = 0;
longjmp (ptabort, 1);
}
void
proxtrans (char *cmd, char *local, char *remote)
{
sighand oldintr = NULL;
int secndflag = 0, prox_type, nfnd;
char *cmd2;
fd_set mask;
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) {
printf ("proxy server does not support third party transfers.\n");
return;
}
pswitch (0);
if (!connected) {
printf ("No primary connection\n");
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) {
signal (SIGINT, oldintr);
pswitch (1);
return;
}
sleep (2);
pswitch (1);
secndflag++;
if (command ("%s %s", cmd2, local) != PRELIM)
goto abort;
ptflag++;
getreply (0);
pswitch (0);
getreply (0);
signal (SIGINT, oldintr);
pswitch (1);
ptflag = 0;
printf ("local: %s remote: %s\n", local, remote);
return;
abort:
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 ((FILE *) NULL);
}
pswitch (1);
if (ptabflg)
code = -1;
if (oldintr)
signal (SIGINT, oldintr);
return;
}
if (cpend)
abort_remote ((FILE *) 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 ((FILE *) NULL);
pswitch (1);
if (ptabflg)
code = -1;
signal (SIGINT, oldintr);
return;
}
}
if (cpend)
abort_remote ((FILE *) NULL);
pswitch (!proxy);
if (cpend) {
FD_ZERO (&mask);
if (fileno(cin) >= FD_SETSIZE)
errx (1, "fd too large");
FD_SET (fileno (cin), &mask);
if ((nfnd = empty (&mask, 10)) <= 0) {
if (nfnd < 0) {
warn ("abort");
}
if (ptabflg)
code = -1;
lostpeer (0);
}
getreply (0);
getreply (0);
}
if (proxy)
pswitch (0);
pswitch (1);
if (ptabflg)
code = -1;
signal (SIGINT, oldintr);
}
void
reset (int argc, char **argv)
{
fd_set mask;
int nfnd = 1;
FD_ZERO (&mask);
while (nfnd > 0) {
if (fileno (cin) >= FD_SETSIZE)
errx (1, "fd too large");
FD_SET (fileno (cin), &mask);
if ((nfnd = empty (&mask, 0)) < 0) {
warn ("reset");
code = -1;
lostpeer(0);
} else if (nfnd) {
getreply(0);
}
}
}
char *
gunique (char *local)
{
static char new[MaxPathLen];
char *cp = strrchr (local, '/');
int d, count = 0;
char ext = '1';
if (cp)
*cp = '\0';
d = access (cp ? local : ".", 2);
if (cp)
*cp = '/';
if (d < 0) {
warn ("local: %s", local);
return NULL;
}
strlcpy (new, local, sizeof(new));
cp = new + strlen(new);
*cp++ = '.';
while (!d) {
if (++count == 100) {
printf ("runique: can't find unique file name.\n");
return NULL;
}
*cp++ = ext;
*cp = '\0';
if (ext == '9')
ext = '0';
else
ext++;
if ((d = access (new, 0)) < 0)
break;
if (ext != '0')
cp--;
else if (*(cp - 2) == '.')
*(cp - 1) = '1';
else {
*(cp - 2) = *(cp - 2) + 1;
cp--;
}
}
return (new);
}
void
abort_remote (FILE * din)
{
char buf[BUFSIZ];
int nfnd;
fd_set mask;
/*
* 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, "%c", DM);
sec_fprintf(cout, "ABOR");
sec_fflush (cout);
fprintf (cout, "\r\n");
fflush(cout);
FD_ZERO (&mask);
if (fileno (cin) >= FD_SETSIZE)
errx (1, "fd too large");
FD_SET (fileno (cin), &mask);
if (din) {
if (fileno (din) >= FD_SETSIZE)
errx (1, "fd too large");
FD_SET (fileno (din), &mask);
}
if ((nfnd = empty (&mask, 10)) <= 0) {
if (nfnd < 0) {
warn ("abort");
}
if (ptabflg)
code = -1;
lostpeer (0);
}
if (din && FD_ISSET (fileno (din), &mask)) {
while (read (fileno (din), buf, BUFSIZ) > 0)
/* LOOP */ ;
}
if (getreply (0) == ERROR && code == 552) {
/* 552 needed for nic style abort */
getreply (0);
}
getreply (0);
}
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