📄 ftp.c
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#define L_SET SEEK_SET
#define L_INCR SEEK_CUR
#define caddr_t void *
/*
* Copyright (c) 1985, 1989 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)ftp.c 5.28 (Berkeley) 4/20/89";
#endif /* not lint */
#include <io.h>
#include <sys/stat.h>
#ifndef _WIN32
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#include <pwd.h>
#include <varargs.h>
#include <netdb.h>
#else
#include <winsock.h>
#endif
#include <stdio.h>
#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include "ftp_var.h"
#include "prototypes.h"
#ifndef MAXHOSTNAMELEN
#define MAXHOSTNAMELEN 64
#endif
#ifdef NOVFPRINTF
#define vfprintf(a,b,c) _doprnt(b,c,a)
#endif
#ifdef sun
/* FD_SET wasn't defined until 4.0. its a cheap test for uid_t presence */
#ifndef FD_SET
#define NBBY 8 /* number of bits in a byte */
/*
* Select uses bit masks of file descriptors in longs.
* These macros manipulate such bit fields (the filesystem macros use chars).
* FD_SETSIZE may be defined by the user, but the default here
* should be >= NOFILE (param.h).
*/
#ifndef FD_SETSIZE
#define FD_SETSIZE 256
#endif
typedef long fd_mask;
#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
#ifndef howmany
#define howmany(x, y) (((x)+((y)-1))/(y))
#endif
#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
#define FD_ZERO(p) bzero((char *)(p), sizeof(*(p)))
typedef int uid_t;
typedef int gid_t;
#endif
#endif
struct sockaddr_in hisctladdr;
struct sockaddr_in data_addr;
int data = -1;
int abrtflag = 0;
int ptflag = 0;
int allbinary;
struct sockaddr_in myctladdr;
uid_t getuid();
sig_t lostpeer();
off_t restart_point = 0;
SOCKET cin, cout;
int dataconn(const char *mode);
int command(const char *fmt, ...);
char *hostname;
typedef void (*Sig_t)(int);
// Signal Handlers
void psabort(int sig);
char *hookup(char *host, int port)
{
register struct hostent *hp = 0;
int len;
SOCKET s;
static char hostnamebuf[80];
bzero((char *)&hisctladdr, sizeof (hisctladdr));
hisctladdr.sin_addr.s_addr = inet_addr(host);
if (hisctladdr.sin_addr.s_addr != (unsigned long)-1) {
hisctladdr.sin_family = AF_INET;
(void) strncpy(hostnamebuf, host, sizeof(hostnamebuf));
} else {
hp = gethostbyname(host);
if (hp == NULL) {
fprintf(stderr, "ftp: %s: ", host);
herror((char *)NULL);
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) strncpy(hostnamebuf, hp->h_name, sizeof(hostnamebuf));
}
hostname = hostnamebuf;
s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) {
perror("ftp: socket");
code = -1;
return (0);
}
hisctladdr.sin_port = port;
while (connect(s, (struct sockaddr *)&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) fflush(stdout);
(void) close(s);
s = socket(hisctladdr.sin_family, SOCK_STREAM, 0);
if (s == INVALID_SOCKET) {
perror("ftp: socket");
code = -1;
return (0);
}
continue;
}
perror("ftp: connect");
code = -1;
goto bad;
}
len = sizeof (myctladdr);
if (getsockname(s, (struct sockaddr *)&myctladdr, &len) < 0) {
perror("ftp: getsockname");
code = -1;
goto bad;
}
cin = cout = s;
if (verbose) {
printf("Connected to %s.\n", hostname);
(void) fflush(stdout);
}
if (getreply(0) > 2) { /* read startup message from server */
closesocket(cin);
code = -1;
goto bad;
}
#ifdef SO_OOBINLINE
{
int on = 1;
if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, (const char *) &on, sizeof(on))
< 0 && debug) {
perror("ftp: setsockopt");
}
}
#endif //SO_OOBINLINE
return (hostname);
bad:
(void) close(s);
return ((char *)0);
}
int login(const char *host)
{
char tmp[80];
char *puser, *ppass, *pacct;
const char *user, *pass, *acct;
int n, aflag = 0;
user = pass = acct = 0;
n = ruserpass(host, &puser, &ppass, &pacct);
if (n < 0) {
code = -1;
return(0);
}
if (0 != n) {
user = puser;
pass = ppass;
acct = pacct;
}
while (user == NULL) {
const char *myname = "none"; // This needs to become the usename env
if (myname)
printf("Name (%s:%s): ", host, myname);
else
printf("Name (%s): ", host);
(void) fflush(stdout);
(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 = getpass("Password:");
n = command("PASS %s", pass);
fflush(stdin);
}
if (n == CONTINUE) {
aflag++;
acct = getpass("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);
}
static void
cmdabort(int sig)
{
extern jmp_buf ptabort;
printf("\n");
(void) fflush(stdout);
abrtflag++;
if (ptflag)
longjmp(ptabort,1);
}
/*VARARGS1*/
int command(const char *fmt, ...)
{
va_list ap;
int r;
void (*oldintr)(int);
abrtflag = 0;
if (debug) {
printf("---> ");
va_start(ap, fmt);
vfprintf(stdout, fmt, ap);
va_end(ap);
printf("\n");
(void) fflush(stdout);
}
if (cout == (int) NULL) {
perror ("No control connection for command");
code = -1;
return (0);
}
oldintr = signal(SIGINT,cmdabort);
{
char buffer[1024];
va_start(ap, fmt);
vsprintf(buffer, fmt, ap);
va_end(ap);
//DLJ: to work through firewalls - send the command as a single message
strcat(buffer,"\r\n");
fprintfSocket(cout, buffer);
}
//DLJ: the following two lines are replaced by the strcat above - seems to
// make it work through firewalls.
// fprintfSocket(cout, "\r\n");
// (void) fflush(cout);
cpend = 1;
r = getreply(!strcmp(fmt, "QUIT"));
if (abrtflag && oldintr != SIG_IGN)
(*oldintr)(SIGINT);
// (void) signal(SIGINT, oldintr);
return(r);
}
char reply_string[BUFSIZ]; /* last line of previous reply */
#include <ctype.h>
int
getreply(expecteof)
int expecteof;
{
register int c, n;
register int dig;
register char *cp;
int originalcode = 0, continuation = 0;
void (*oldintr)(int);
int pflag = 0;
char *pt = pasv;
oldintr = signal(SIGINT,cmdabort);
for (;;) {
dig = n = code = 0;
cp = reply_string;
while ((c = fgetcSocket(cin)) != '\n') {
if (c == IAC) { /* handle telnet commands */
switch (c = fgetcSocket(cin)) {
case WILL:
case WONT:
c = fgetcSocket(cin);
fprintfSocket(cout, "%c%c%c",IAC,DONT,c);
break;
case DO:
case DONT:
c = fgetcSocket(cin);
fprintfSocket(cout, "%c%c%c",IAC,WONT,c);
break;
default:
break;
}
continue;
}
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);
(void) fflush(stdout);
}
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')) {
(void) putchar(c);
(void) fflush (stdout);
}
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');
}
}
static int
empty(mask, sec)
struct fd_set *mask;
int sec;
{
struct timeval t;
t.tv_sec = (long) sec;
t.tv_usec = 0;
return(select(32, mask, (struct fd_set *) 0, (struct fd_set *) 0, &t));
}
jmp_buf sendabort;
#if 0
void abortsend()
{
mflag = 0;
abrtflag = 0;
printf("\nsend aborted\n");
(void) fflush(stdout);
longjmp(sendabort, 1);
}
#endif
#define HASHBYTES 1024
void sendrequest(const char *cmd, const char *local, const char *remote, int printnames)
{
FILE *fin;
int dout = 0;
int (*closefunc)(), _pclose(), fclose();
sig_t (*oldintr)(), (*oldintp)();
char buf[BUFSIZ], *bufp;
long bytes = 0, hashbytes = HASHBYTES;
register int c, d;
struct stat st;
struct timeval start, stop;
const char *mode;
if (verbose && printnames) {
if (local && *local != '-')
printf("local: %s ", local);
if (remote)
printf("remote: %s\n", remote);
(void) fflush(stdout);
}
if (proxy) {
proxtrans(cmd, local, remote);
return;
}
closefunc = NULL;
oldintr = NULL;
oldintp = NULL;
mode = "w";
if (setjmp(sendabort)) {
while (cpend) {
(void) getreply(0);
}
if (data >= 0) {
(void) close(data);
data = -1;
}
if (oldintr)
null();// (void) signal(SIGINT,oldintr);
if (oldintp)
null();// (void) signal(SIGPIPE,oldintp);
code = -1;
return;
}
null();// oldintr = signal(SIGINT, abortsend);
if (strcmp(local, "-") == 0)
fin = stdin;
else if (*local == '|') {
null();// oldintp = signal(SIGPIPE,SIG_IGN);
fin = _popen(local + 1, "r");
if (fin == NULL) {
perror(local + 1);
null();// (void) signal(SIGINT, oldintr);
null();// (void) signal(SIGPIPE, oldintp);
code = -1;
return;
}
closefunc = _pclose;
} else {
fin = fopen(local, "r");
if (fin == NULL) {
perror(local);
null();// (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) fflush(stdout);
null();// (void) signal(SIGINT, oldintr);
fclose(fin);
code = -1;
return;
}
}
if (initconn()) {
null();// (void) signal(SIGINT, oldintr);
if (oldintp)
null();// (void) 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)) {
if (fseek(fin, (long) restart_point, 0) < 0) {
perror(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;
mode = "r+w";
}
if (remote) {
if (command("%s %s", cmd, remote) != PRELIM) {
null();// (void) signal(SIGINT, oldintr);
if (oldintp)
null();// (void) signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
} else
if (command("%s", cmd) != PRELIM) {
null();// (void) signal(SIGINT, oldintr);
if (oldintp)
null();// (void) signal(SIGPIPE, oldintp);
if (closefunc != NULL)
(*closefunc)(fin);
return;
}
dout = dataconn(mode);
if (dout == (int)NULL)
goto abort;
(void) gettimeofday(&start, (struct timezone *)0);
null();// oldintp = signal(SIGPIPE, SIG_IGN);
switch (type) {
case TYPE_I:
case TYPE_L:
errno = d = 0;
while ((c = read(fileno(fin), buf, sizeof (buf))) > 0) {
bytes += c;
for (bufp = buf; c > 0; c -= d, bufp += d)
if ((d = send(dout, bufp, c, 0)) <= 0)
break;
if (hash) {
while (bytes >= hashbytes) {
(void) putchar('#');
hashbytes += HASHBYTES;
}
(void) fflush(stdout);
}
}
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