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can't reconnect after some errors
[unix-history] / usr / src / usr.bin / ftp / ftp.c
/*
* Copyright (c) 1985 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
static char sccsid[] = "@(#)ftp.c 5.10 (Berkeley) %G%";
#endif not lint
#include "ftp_var.h"
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <netdb.h>
#include <fcntl.h>
#include <pwd.h>
struct sockaddr_in hisctladdr;
struct sockaddr_in data_addr;
int data = -1;
int telflag = 0;
int abrtflag = 0;
int ptflag = 0;
int connected;
struct sockaddr_in myctladdr;
uid_t getuid();
FILE *cin, *cout;
FILE *dataconn();
char *
hookup(host, port)
char *host;
int port;
{
register struct hostent *hp = 0;
int s,len,oldverbose;
static char hostnamebuf[80];
char msg[2];
bzero((char *)&hisctladdr, sizeof (hisctladdr));
hisctladdr.sin_addr.s_addr = inet_addr(host);
if (hisctladdr.sin_addr.s_addr != -1) {
hisctladdr.sin_family = AF_INET;
(void) strcpy(hostnamebuf, host);
}
else {
hp = gethostbyname(host);
if (hp == NULL) {
printf("%s: unknown host\n", host);
code = -1;
return((char *) 0);
}
hisctladdr.sin_family = hp->h_addrtype;
bcopy(hp->h_addr_list[0],
(caddr_t)&hisctladdr.sin_addr, hp->h_length);
(void) strcpy(hostnamebuf, hp->h_name);
}
hostname = hostnamebuf;
s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
if (s < 0) {
perror("ftp: socket");
code = -1;
return (0);
}
hisctladdr.sin_port = port;
while (connect(s, &hisctladdr, sizeof (hisctladdr)) < 0) {
if (hp && hp->h_addr_list[1]) {
int oerrno = errno;
fprintf(stderr, "ftp: connect to address %s: ",
inet_ntoa(hisctladdr.sin_addr));
errno = oerrno;
perror((char *) 0);
hp->h_addr_list++;
bcopy(hp->h_addr_list[0],
(caddr_t)&hisctladdr.sin_addr, hp->h_length);
fprintf(stdout, "Trying %s...\n",
inet_ntoa(hisctladdr.sin_addr));
(void) close(s);
s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
if (s < 0) {
perror("ftp: socket");
code = -1;
return (0);
}
continue;
}
perror("ftp: connect");
code = -1;
goto bad;
}
len = sizeof (myctladdr);
if (getsockname(s, (char *)&myctladdr, &len) < 0) {
perror("ftp: getsockname");
code = -1;
goto bad;
}
cin = fdopen(s, "r");
cout = fdopen(s, "w");
if (cin == NULL || cout == NULL) {
fprintf(stderr, "ftp: fdopen failed.\n");
if (cin)
(void) fclose(cin);
if (cout)
(void) 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)
(void) fclose(cin);
if (cout)
(void) fclose(cout);
code = -1;
goto bad;
}
/* test to see if server command parser understands TELNET SYNC command */
fprintf(cout,"%c%c",IAC,NOP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(s,msg,2,MSG_OOB) != 2)
perror("sync");
oldverbose = verbose;
if (!debug)
verbose = -1;
if (command("NOOP") == COMPLETE)
telflag = 1;
else
telflag = 0;
verbose = oldverbose;
return (hostname);
bad:
(void) close(s);
return ((char *)0);
}
login(host)
char *host;
{
char tmp[80];
char *user, *pass, *acct, *getlogin(), *mygetpass();
int n, aflag = 0;
user = pass = acct = 0;
if (ruserpass(host, &user, &pass, &acct) < 0) {
disconnect();
code = -1;
return(0);
}
if (user == NULL) {
char *myname = getlogin();
if (myname == NULL) {
struct passwd *pp = getpwuid(getuid());
if (pp != NULL)
myname = pp->pw_name;
}
printf("Name (%s:%s): ", host, myname);
(void) fgets(tmp, sizeof(tmp) - 1, stdin);
tmp[strlen(tmp) - 1] = '\0';
if (*tmp == '\0')
user = myname;
else
user = tmp;
}
n = command("USER %s", user);
if (n == CONTINUE) {
if (pass == NULL)
pass = mygetpass("Password:");
n = command("PASS %s", pass);
}
if (n == CONTINUE) {
aflag++;
acct = mygetpass("Account:");
n = command("ACCT %s", acct);
}
if (n != COMPLETE) {
fprintf(stderr, "Login failed.\n");
return (0);
}
if (!aflag && acct != NULL)
(void) command("ACCT %s", acct);
if (proxy)
return(1);
for (n = 0; n < macnum; ++n) {
if (!strcmp("init", macros[n].mac_name)) {
(void) strcpy(line, "$init");
makeargv();
domacro(margc, margv);
break;
}
}
return (1);
}
cmdabort()
{
extern jmp_buf ptabort;
printf("\n");
(void) fflush(stdout);
abrtflag++;
if (ptflag)
longjmp(ptabort,1);
}
/*VARARGS1*/
command(fmt, args)
char *fmt;
{
int r, (*oldintr)(), cmdabort();
abrtflag = 0;
if (debug) {
printf("---> ");
_doprnt(fmt, &args, stdout);
printf("\n");
(void) fflush(stdout);
}
if (cout == NULL) {
perror ("No control connection for command");
code = -1;
return (0);
}
oldintr = signal(SIGINT,cmdabort);
_doprnt(fmt, &args, cout);
fprintf(cout, "\r\n");
(void) fflush(cout);
cpend = 1;
r = getreply(!strcmp(fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN)
(*oldintr)();
(void) signal(SIGINT, oldintr);
return(r);
}
#include <ctype.h>
getreply(expecteof)
int expecteof;
{
register int c, n;
register int dig;
int originalcode = 0, continuation = 0, (*oldintr)(), cmdabort();
int pflag = 0;
char *pt = pasv;
oldintr = signal(SIGINT,cmdabort);
for (;;) {
dig = n = code = 0;
while ((c = getc(cin)) != '\n') {
dig++;
if (c == EOF) {
if (expecteof) {
(void) signal(SIGINT,oldintr);
code = 221;
return (0);
}
lostpeer();
if (verbose) {
printf("421 Service not available, remote server has closed connection\n");
(void) 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);
(void) 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 (verbose > 0 || verbose > -1 && n == '5') {
(void) putchar(c);
(void) fflush (stdout);
}
if (continuation && code != originalcode) {
if (originalcode == 0)
originalcode = code;
continue;
}
if (n != '1')
cpend = 0;
(void) signal(SIGINT,oldintr);
if (code == 421 || originalcode == 421)
lostpeer();
if (abrtflag && oldintr != cmdabort && oldintr != SIG_IGN)
(*oldintr)();
return (n - '0');
}
}
empty(mask, sec)
struct fd_set mask;
int sec;
{
struct timeval t;
t.tv_sec = (long) sec;
t.tv_usec = 0;
if (select(20, &mask, (struct fd_set *) 0, (struct fd_set *) 0, &t) < 0)
return(-1);
return (1);
}
jmp_buf sendabort;
abortsend()
{
mflag = 0;
abrtflag = 0;
printf("\nsend aborted\n");
(void) fflush(stdout);
longjmp(sendabort, 1);
}
sendrequest(cmd, local, remote)
char *cmd, *local, *remote;
{
FILE *fin, *dout = 0, *mypopen();
int (*closefunc)(), mypclose(), fclose(), (*oldintr)(), (*oldintp)();
int abortsend();
char buf[BUFSIZ];
long bytes = 0, hashbytes = sizeof (buf);
register int c, d;
struct stat st;
struct timeval start, stop;
if (proxy) {
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
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);
code = -1;
return;
}
oldintr = signal(SIGINT, abortsend);
if (strcmp(local, "-") == 0)
fin = stdin;
else if (*local == '|') {
oldintp = signal(SIGPIPE,SIG_IGN);
fin = mypopen(local + 1, "r");
if (fin == NULL) {
perror(local + 1);
(void) signal(SIGINT, oldintr);
(void) signal(SIGPIPE, oldintp);
code = -1;
return;
}
closefunc = mypclose;
} else {
fin = fopen(local, "r");
if (fin == NULL) {
perror(local);
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
closefunc = fclose;
if (fstat(fileno(fin), &st) < 0 ||
(st.st_mode&S_IFMT) != S_IFREG) {
fprintf(stdout, "%s: not a plain file.\n", local);
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
}
if (initconn()) {
(void) signal(SIGINT, oldintr);
if (oldintp)
(void) signal(SIGPIPE, oldintp);
code = -1;
return;
}
if (setjmp(sendabort))
goto abort;
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void) signal(SIGINT, oldintr);
if (oldintp)
(void) signal(SIGPIPE, oldintp);
return;
}
} else
if (command("%s", cmd) != PRELIM) {
(void) signal(SIGINT, oldintr);
if (oldintp)
(void) signal(SIGPIPE, oldintp);
return;
}
dout = dataconn("w");
if (dout == NULL)
goto abort;
(void) gettimeofday(&start, (struct timezone *)0);
switch (type) {
case TYPE_I:
case TYPE_L:
errno = d = 0;
while ((c = read(fileno (fin), buf, sizeof (buf))) > 0) {
if ((d = write(fileno (dout), buf, c)) < 0)
break;
bytes += c;
if (hash) {
(void) putchar('#');
(void) fflush(stdout);
}
}
if (hash && bytes > 0) {
(void) putchar('\n');
(void) fflush(stdout);
}
if (c < 0)
perror(local);
if (d < 0)
perror("netout");
break;
case TYPE_A:
while ((c = getc(fin)) != EOF) {
if (c == '\n') {
while (hash && (bytes >= hashbytes)) {
(void) putchar('#');
(void) fflush(stdout);
hashbytes += sizeof (buf);
}
if (ferror(dout))
break;
(void) putc('\r', dout);
bytes++;
}
(void) putc(c, dout);
bytes++;
/* if (c == '\r') { */
/* (void) putc('\0', dout); /* this violates rfc */
/* bytes++; */
/* } */
}
if (hash) {
if (bytes < hashbytes)
(void) putchar('#');
(void) putchar('\n');
(void) fflush(stdout);
}
if (ferror(fin))
perror(local);
if (ferror(dout))
perror("netout");
break;
}
(void) gettimeofday(&stop, (struct timezone *)0);
if (closefunc != NULL)
(*closefunc)(fin);
(void) fclose(dout);
(void) getreply(0);
(void) signal(SIGINT, oldintr);
if (bytes > 0 && verbose)
ptransfer("sent", bytes, &start, &stop, local, remote);
return;
abort:
(void) gettimeofday(&stop, (struct timezone *)0);
(void) signal(SIGINT, oldintr);
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 && verbose)
ptransfer("sent", bytes, &start, &stop, local, remote);
}
jmp_buf recvabort;
abortrecv()
{
mflag = 0;
abrtflag = 0;
printf("\n");
(void) fflush(stdout);
longjmp(recvabort, 1);
}
recvrequest(cmd, local, remote, mode)
char *cmd, *local, *remote, *mode;
{
FILE *fout, *din = 0, *mypopen();
int (*closefunc)(), mypclose(), fclose(), (*oldintr)(), (*oldintp)();
int abortrecv(), oldverbose, oldtype = 0, tcrflag;
char buf[BUFSIZ], *gunique();
long bytes = 0, hashbytes = sizeof (buf);
struct fd_set mask;
register int c, d;
struct timeval start, stop;
if (proxy && strcmp(cmd,"RETR") == 0) {
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
tcrflag = !crflag && !strcmp(cmd, "RETR");
if (setjmp(recvabort)) {
while (cpend) {
(void) getreply(0);
}
if (data >= 0) {
(void) close(data);
data = -1;
}
if (oldintr)
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
oldintr = signal(SIGINT, abortrecv);
if (strcmp(local, "-") && *local != '|') {
if (access(local, 2) < 0) {
char *dir = rindex(local, '/');
if (errno != ENOENT && errno != EACCES) {
perror(local);
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
if (dir != NULL)
*dir = 0;
d = access(dir ? local : ".", 2);
if (dir != NULL)
*dir = '/';
if (d < 0) {
perror(local);
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
if (!runique && errno == EACCES &&
chmod(local,0600) < 0) {
perror(local);
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
if (runique && errno == EACCES &&
(local = gunique(local)) == NULL) {
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
}
else if (runique && (local = gunique(local)) == NULL) {
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
}
if (initconn()) {
(void) signal(SIGINT, oldintr);
code = -1;
return;
}
if (setjmp(recvabort))
goto abort;
if (strcmp(cmd, "RETR") && type != TYPE_A) {
oldtype = type;
oldverbose = verbose;
if (!debug)
verbose = 0;
setascii();
verbose = oldverbose;
}
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
(void) signal(SIGINT, oldintr);
if (oldtype) {
if (!debug)
verbose = 0;
switch (oldtype) {
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
verbose = oldverbose;
}
return;
}
} else {
if (command("%s", cmd) != PRELIM) {
(void) signal(SIGINT, oldintr);
if (oldtype) {
if (!debug)
verbose = 0;
switch (oldtype) {
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
verbose = oldverbose;
}
return;
}
}
din = dataconn("r");
if (din == NULL)
goto abort;
if (strcmp(local, "-") == 0)
fout = stdout;
else if (*local == '|') {
oldintp = signal(SIGPIPE, SIG_IGN);
fout = mypopen(local + 1, "w");
if (fout == NULL) {
perror(local+1);
goto abort;
}
closefunc = mypclose;
}
else {
fout = fopen(local, mode);
if (fout == NULL) {
perror(local);
goto abort;
}
closefunc = fclose;
}
(void) gettimeofday(&start, (struct timezone *)0);
switch (type) {
case TYPE_I:
case TYPE_L:
errno = d = 0;
while ((c = read(fileno(din), buf, sizeof (buf))) > 0) {
if ((d = write(fileno(fout), buf, c)) < 0)
break;
bytes += c;
if (hash) {
(void) putchar('#');
(void) fflush(stdout);
}
}
if (hash && bytes > 0) {
(void) putchar('\n');
(void) fflush(stdout);
}
if (c < 0)
perror("netin");
if (d < 0)
perror(local);
break;
case TYPE_A:
while ((c = getc(din)) != EOF) {
if (c == '\r') {
while (hash && (bytes >= hashbytes)) {
(void) putchar('#');
(void) fflush(stdout);
hashbytes += sizeof (buf);
}
bytes++;
if ((c = getc(din)) != '\n' || tcrflag) {
if (ferror (fout))
break;
(void) putc ('\r', fout);
}
/*if (c == '\0') {
bytes++;
continue;
}*/
}
(void) putc (c, fout);
bytes++;
}
if (hash) {
if (bytes < hashbytes)
(void) putchar('#');
(void) putchar('\n');
(void) fflush(stdout);
}
if (ferror (din))
perror ("netin");
if (ferror (fout))
perror (local);
break;
}
if (closefunc != NULL)
(*closefunc)(fout);
(void) signal(SIGINT, oldintr);
if (oldintp)
(void) signal(SIGPIPE, oldintp);
(void) gettimeofday(&stop, (struct timezone *)0);
(void) fclose(din);
(void) getreply(0);
if (bytes > 0 && verbose)
ptransfer("received", bytes, &start, &stop, local, remote);
if (oldtype) {
if (!debug)
verbose = 0;
switch (oldtype) {
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
verbose = oldverbose;
}
return;
abort:
/* if server command parser understands TELNET commands, abort using */
/* recommended IP,SYNC sequence */
(void) gettimeofday(&stop, (struct timezone *)0);
if (oldintp)
(void) signal(SIGPIPE, oldintr);
(void) signal(SIGINT,SIG_IGN);
if (oldtype) {
if (!debug)
verbose = 0;
switch (oldtype) {
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
verbose = oldverbose;
}
if (!cpend) {
code = -1;
(void) signal(SIGINT,oldintr);
return;
}
if (telflag) {
char msg[2];
fprintf(cout,"%c%c",IAC,IP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(fileno(cout),msg,2,MSG_OOB) != 2)
perror("abort");
}
fprintf(cout,"ABOR\r\n");
(void) fflush(cout);
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if (din) {
FD_SET(fileno(din), &mask);
}
if (empty(mask,10) < 0) {
perror("abort");
code = -1;
lostpeer();
}
if (din && FD_ISSET(fileno(din), &mask)) {
while ((c = read(fileno(din), buf, sizeof (buf))) > 0)
;
}
if ((c = getreply(0)) == ERROR) { /* needed for nic style abort */
if (data >= 0) {
(void) close(data);
data = -1;
}
(void) getreply(0);
}
(void) getreply(0);
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 && verbose)
ptransfer("received", bytes, &start, &stop, local, remote);
(void) signal(SIGINT,oldintr);
}
/*
* Need to start a listen on the data channel
* before we send the command, otherwise the
* server's connect may fail.
*/
static int sendport = -1;
initconn()
{
register char *p, *a;
int result, len, tmpno = 0;
char on = 1;
noport:
data_addr = myctladdr;
if (sendport)
data_addr.sin_port = 0; /* let system pick one */
if (data != -1)
(void) close (data);
data = socket(AF_INET, SOCK_STREAM, 0);
if (data < 0) {
perror("ftp: socket");
if (tmpno)
sendport = 1;
return (1);
}
if (!sendport)
if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, &on, sizeof (on)) < 0) {
perror("ftp: setsockopt (resuse address)");
goto bad;
}
if (bind(data, (struct sockaddr *)&data_addr, sizeof (data_addr)) < 0) {
perror("ftp: bind");
goto bad;
}
if (options & SO_DEBUG &&
setsockopt(data, SOL_SOCKET, SO_DEBUG, &on, sizeof (on)) < 0)
perror("ftp: setsockopt (ignored)");
len = sizeof (data_addr);
if (getsockname(data, (char *)&data_addr, &len) < 0) {
perror("ftp: getsockname");
goto bad;
}
if (listen(data, 1) < 0)
perror("ftp: listen");
if (sendport) {
a = (char *)&data_addr.sin_addr;
p = (char *)&data_addr.sin_port;
#define UC(b) (((int)b)&0xff)
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]));
if (result == ERROR && sendport == -1) {
sendport = 0;
tmpno = 1;
goto noport;
}
return (result != COMPLETE);
}
if (tmpno)
sendport = 1;
return (0);
bad:
(void) close(data), data = -1;
if (tmpno)
sendport = 1;
return (1);
}
FILE *
dataconn(mode)
char *mode;
{
struct sockaddr_in from;
int s, fromlen = sizeof (from);
s = accept(data, (struct sockaddr *) &from, &fromlen);
if (s < 0) {
perror("ftp: accept");
(void) close(data), data = -1;
return (NULL);
}
(void) close(data);
data = s;
return (fdopen(data, mode));
}
ptransfer(direction, bytes, t0, t1, local, remote)
char *direction, *local, *remote;
long bytes;
struct timeval *t0, *t1;
{
struct timeval td;
float s, bs;
tvsub(&td, t1, t0);
s = td.tv_sec + (td.tv_usec / 1000000.);
#define nz(x) ((x) == 0 ? 1 : (x))
bs = bytes / nz(s);
if (local && *local != '-')
printf("local: %s ", local);
if (remote)
printf("remote: %s\n", remote);
printf("%ld bytes %s in %.2g seconds (%.2g Kbytes/s)\n",
bytes, direction, s, bs / 1024.);
}
/*tvadd(tsum, t0)
struct timeval *tsum, *t0;
{
tsum->tv_sec += t0->tv_sec;
tsum->tv_usec += t0->tv_usec;
if (tsum->tv_usec > 1000000)
tsum->tv_sec++, tsum->tv_usec -= 1000000;
} */
tvsub(tdiff, t1, t0)
struct timeval *tdiff, *t1, *t0;
{
tdiff->tv_sec = t1->tv_sec - t0->tv_sec;
tdiff->tv_usec = t1->tv_usec - t0->tv_usec;
if (tdiff->tv_usec < 0)
tdiff->tv_sec--, tdiff->tv_usec += 1000000;
}
psabort()
{
extern int abrtflag;
abrtflag++;
}
pswitch(flag)
int flag;
{
extern int proxy, abrtflag;
int (*oldintr)();
static struct comvars {
int connect;
char name[32];
struct sockaddr_in mctl;
struct sockaddr_in hctl;
FILE *in;
FILE *out;
int tflag;
int tpe;
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;
(void) strncpy(ip->name, hostname, 31);
(ip->name)[strlen(ip->name)] = '\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->tflag = telflag;
telflag = op->tflag;
ip->tpe = type;
type = op->tpe;
if (!type)
type = 1;
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) strncpy(ip->nti, ntin, 16);
(ip->nti)[strlen(ip->nti)] = '\0';
(void) strcpy(ntin, op->nti);
(void) strncpy(ip->nto, ntout, 16);
(ip->nto)[strlen(ip->nto)] = '\0';
(void) strcpy(ntout, op->nto);
ip->mapflg = mapflag;
mapflag = op->mapflg;
(void) strncpy(ip->mi, mapin, MAXPATHLEN - 1);
(ip->mi)[strlen(ip->mi)] = '\0';
(void) strcpy(mapin, op->mi);
(void) strncpy(ip->mo, mapout, MAXPATHLEN - 1);
(ip->mo)[strlen(ip->mo)] = '\0';
(void) strcpy(mapout, op->mo);
(void) signal(SIGINT, oldintr);
if (abrtflag) {
abrtflag = 0;
(*oldintr)();
}
}
jmp_buf ptabort;
int ptabflg;
abortpt()
{
printf("\n");
(void) fflush(stdout);
ptabflg++;
mflag = 0;
abrtflag = 0;
longjmp(ptabort, 1);
}
proxtrans(cmd, local, remote)
char *cmd, *local, *remote;
{
int (*oldintr)(), abortpt(), tmptype, oldtype = 0, secndflag = 0;
extern jmp_buf ptabort;
char *cmd2;
struct fd_set mask;
if (strcmp(cmd, "RETR"))
cmd2 = "RETR";
else
cmd2 = runique ? "STOU" : "STOR";
if (command("PASV") != COMPLETE) {
printf("proxy server does not support third part transfers.\n");
return;
}
tmptype = type;
pswitch(0);
if (!connected) {
printf("No primary connection\n");
pswitch(1);
code = -1;
return;
}
if (type != tmptype) {
oldtype = type;
switch (tmptype) {
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
}
if (command("PORT %s", pasv) != COMPLETE) {
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
pswitch(1);
return;
}
if (setjmp(ptabort))
goto abort;
oldintr = signal(SIGINT, abortpt);
if (command("%s %s", cmd, remote) != PRELIM) {
(void) signal(SIGINT, oldintr);
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
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);
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
pswitch(1);
ptflag = 0;
printf("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);
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
if (cpend && telflag) {
char msg[2];
fprintf(cout,"%c%c",IAC,IP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(fileno(cout),msg,2,MSG_OOB) != 2)
perror("abort");
}
if (cpend) {
fprintf(cout,"ABOR\r\n");
(void) fflush(cout);
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if (empty(mask,10) < 0) {
perror("abort");
if (ptabflg)
code = -1;
lostpeer();
}
(void) getreply(0);
(void) getreply(0);
}
}
pswitch(1);
if (ptabflg)
code = -1;
(void) signal(SIGINT, oldintr);
return;
}
if (cpend && telflag) {
char msg[2];
fprintf(cout,"%c%c",IAC,IP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(fileno(cout),msg,2,MSG_OOB) != 2)
perror("abort");
}
if (cpend) {
fprintf(cout,"ABOR\r\n");
(void) fflush(cout);
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if ((empty(mask,10)) < 0) {
perror("abort");
if (ptabflg)
code = -1;
lostpeer();
}
(void) getreply(0);
(void) getreply(0);
}
pswitch(!proxy);
if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */
if (command("%s %s", cmd2, local) != PRELIM) {
pswitch(0);
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
if (cpend && telflag) {
char msg[2];
fprintf(cout,"%c%c",IAC,IP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(fileno(cout),msg,2,MSG_OOB) != 2)
perror("abort");
}
if (cpend) {
fprintf(cout,"ABOR\r\n");
(void) fflush(cout);
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if (empty(mask,10) < 0) {
perror("abort");
if (ptabflg)
code = -1;
lostpeer();
}
(void) getreply(0);
(void) getreply(0);
}
pswitch(1);
if (ptabflg)
code = -1;
(void) signal(SIGINT, oldintr);
return;
}
}
if (cpend && telflag) {
char msg[2];
fprintf(cout,"%c%c",IAC,IP);
(void) fflush(cout);
*msg = IAC;
*(msg+1) = DM;
if (send(fileno(cout),msg,2,MSG_OOB) != 2)
perror("abort");
}
if (cpend) {
fprintf(cout,"ABOR\r\n");
(void) fflush(cout);
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if (empty(mask,10) < 0) {
perror("abort");
if (ptabflg)
code = -1;
lostpeer();
}
(void) getreply(0);
(void) getreply(0);
}
pswitch(!proxy);
if (cpend) {
FD_ZERO((char *) &mask);
FD_SET(fileno(cin), &mask);
if (empty(mask,10) < 0) {
perror("abort");
if (ptabflg)
code = -1;
lostpeer();
}
(void) getreply(0);
(void) getreply(0);
}
if (proxy)
pswitch(0);
switch (oldtype) {
case 0:
break;
case TYPE_A:
setascii();
break;
case TYPE_I:
setbinary();
break;
case TYPE_E:
setebcdic();
break;
case TYPE_L:
settenex();
break;
}
pswitch(1);
if (ptabflg)
code = -1;
(void) signal(SIGINT, oldintr);
}
reset()
{
struct fd_set mask;
int nfnd = 1;
FD_ZERO((char *) &mask);
while (nfnd) {
FD_SET(fileno(cin), &mask);
if ((nfnd = empty(mask,0)) < 0) {
perror("reset");
code = -1;
lostpeer();
}
else {
(void) getreply(0);
}
}
}
char *
gunique(local)
char *local;
{
static char new[MAXPATHLEN];
char *cp = rindex(local, '/');
int d, count=0;
char ext = '1';
if (cp)
*cp = '\0';
d = access(cp ? local : ".", 2);
if (cp)
*cp = '/';
if (d < 0) {
perror(local);
return((char *) 0);
}
(void) strcpy(new, local);
cp = new + strlen(new);
*cp++ = '.';
while (!d) {
if (++count == 100) {
printf("runique: can't find unique file name.\n");
return((char *) 0);
}
*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);
}
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.