static void handlenetoutput(int len)
{
/* here we could do smart tricks how to handle 0xFF:s in output
* stream like writing twice every sequence of FF:s (thus doing
* many write()s. But I think interactive telnet application does
* not need to be 100% 8-bit clean, so changing every 0xff:s to
* 0x7f:s
*
* 2002-mar-21, Przemyslaw Czerpak ([email protected])
* I don't agree.
* first - I cannot use programs like sz/rz
* second - the 0x0D is sent as one character and if the next
* char is 0x0A then it's eaten by a server side.
* third - whay doy you have to make 'many write()s'?
* I don't understand.
* So I implemented it. It's realy useful for me. I hope that
* others people will find it interesting to.
*/
int i, j;
byte * p = G.buf;
byte outbuf[4*DATABUFSIZE];
for (i = len, j = 0; i > 0; i--, p++)
{
if (*p == 0x1d)
{
conescape();
return;
}
outbuf[j++] = *p;
if (*p == 0xff)
outbuf[j++] = 0xff;
else if (*p == 0x0d)
outbuf[j++] = 0x00;
}
if (j > 0 )
write(G.netfd, outbuf, j);
}
extern int telnet_main(int argc, char** argv)
{
int len;
struct sockaddr_in s_in;
#ifdef USE_POLL
struct pollfd ufds[2];
#else
fd_set readfds;
int maxfd;
#endif
#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
int opt;
#endif
#ifdef CONFIG_FEATURE_AUTOWIDTH
get_terminal_width_height(0, &win_width, &win_height);
#endif
#ifdef CONFIG_FEATURE_TELNET_TTYPE
ttype = getenv("TERM");
#endif
memset(&G, 0, sizeof G);
if (tcgetattr(0, &G.termios_def) < 0)
exit(1);
G.termios_raw = G.termios_def;
cfmakeraw(&G.termios_raw);
if (argc < 2)
bb_show_usage();
#ifdef CONFIG_FEATURE_TELNET_AUTOLOGIN
autologin = NULL;
while ((opt = getopt(argc, argv, "al:")) != EOF) {
switch (opt) {
case 'l':
autologin = optarg;
break;
case 'a':
autologin = getenv("USER");
break;
case '?':
bb_show_usage();
break;
}
}
if (optind < argc) {
bb_lookup_host(&s_in, argv[optind++]);
s_in.sin_port = bb_lookup_port((optind < argc) ? argv[optind++] :
"telnet", "tcp", 23);
if (optind < argc)
bb_show_usage();
} else
bb_show_usage();
#else
bb_lookup_host(&s_in, argv[1]);
s_in.sin_port = bb_lookup_port((argc == 3) ? argv[2] : "telnet", "tcp", 23);
#endif
G.netfd = xconnect(&s_in);
setsockopt(G.netfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one);
signal(SIGINT, fgotsig);
#ifdef USE_POLL
ufds[0].fd = 0; ufds[1].fd = G.netfd;
ufds[0].events = ufds[1].events = POLLIN;
#else
FD_ZERO(&readfds);
FD_SET(0, &readfds);
FD_SET(G.netfd, &readfds);
maxfd = G.netfd + 1;
#endif
while (1)
{
#ifndef USE_POLL
fd_set rfds = readfds;
switch (select(maxfd, &rfds, NULL, NULL, NULL))
#else
switch (poll(ufds, 2, -1))
#endif
{
case 0:
/* timeout */
case -1:
/* error, ignore and/or log something, bay go to loop */
if (G.gotsig)
conescape();
else
sleep(1);
break;
default:
#ifdef USE_POLL
if (ufds[0].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(0, &rfds))
#endif
{
len = read(0, G.buf, DATABUFSIZE);
if (len <= 0)
doexit(0);
TRACE(0, ("Read con: %d\n", len));
handlenetoutput(len);
}
#ifdef USE_POLL
if (ufds[1].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(G.netfd, &rfds))
#endif
{
len = read(G.netfd, G.buf, DATABUFSIZE);
if (len <= 0)
{
WriteCS(1, "Connection closed by foreign host.\r\n");
doexit(1);
}
TRACE(0, ("Read netfd (%d): %d\n", G.netfd, len));
handlenetinput(len);
}
}
}
}
int telnet_main(int argc, char **argv)
{
char *host;
int port;
int len;
#ifdef USE_POLL
struct pollfd ufds[2];
#else
fd_set readfds;
int maxfd;
#endif
INIT_G();
#if ENABLE_FEATURE_AUTOWIDTH
get_terminal_width_height(0, &G.win_width, &G.win_height);
#endif
#if ENABLE_FEATURE_TELNET_TTYPE
G.ttype = getenv("TERM");
#endif
if (tcgetattr(0, &G.termios_def) >= 0) {
G.do_termios = 1;
G.termios_raw = G.termios_def;
cfmakeraw(&G.termios_raw);
}
if (argc < 2)
bb_show_usage();
#if ENABLE_FEATURE_TELNET_AUTOLOGIN
if (1 & getopt32(argv, "al:", &G.autologin))
G.autologin = getenv("USER");
argv += optind;
#else
argv++;
#endif
if (!*argv)
bb_show_usage();
host = *argv++;
port = bb_lookup_port(*argv ? *argv++ : "telnet", "tcp", 23);
if (*argv) /* extra params?? */
bb_show_usage();
G.netfd = create_and_connect_stream_or_die(host, port);
setsockopt(G.netfd, SOL_SOCKET, SO_KEEPALIVE, &const_int_1, sizeof(const_int_1));
signal(SIGINT, fgotsig);
#ifdef USE_POLL
ufds[0].fd = 0; ufds[1].fd = G.netfd;
ufds[0].events = ufds[1].events = POLLIN;
#else
FD_ZERO(&readfds);
FD_SET(STDIN_FILENO, &readfds);
FD_SET(G.netfd, &readfds);
maxfd = G.netfd + 1;
#endif
while (1) {
#ifndef USE_POLL
fd_set rfds = readfds;
switch (select(maxfd, &rfds, NULL, NULL, NULL))
#else
switch (poll(ufds, 2, -1))
#endif
{
case 0:
/* timeout */
case -1:
/* error, ignore and/or log something, bay go to loop */
if (G.gotsig)
conescape();
else
sleep(1);
break;
default:
#ifdef USE_POLL
if (ufds[0].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(STDIN_FILENO, &rfds))
#endif
{
len = read(STDIN_FILENO, G.buf, DATABUFSIZE);
if (len <= 0)
doexit(EXIT_SUCCESS);
TRACE(0, ("Read con: %d\n", len));
handlenetoutput(len);
}
#ifdef USE_POLL
if (ufds[1].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(G.netfd, &rfds))
#endif
{
len = read(G.netfd, G.buf, DATABUFSIZE);
if (len <= 0) {
write_str(1, "Connection closed by foreign host\r\n");
doexit(EXIT_FAILURE);
}
TRACE(0, ("Read netfd (%d): %d\n", G.netfd, len));
handlenetinput(len);
}
}
}
}
extern int telnet_main(int argc, char** argv)
{
struct in_addr host;
int port;
int len;
#ifdef USE_POLL
struct pollfd ufds[2];
#else
fd_set readfds;
int maxfd;
#endif
#ifdef BB_FEATURE_AUTOWIDTH
struct winsize winp;
if( ioctl(0, TIOCGWINSZ, &winp) == 0 ) {
win_width = winp.ws_col;
win_height = winp.ws_row;
}
#endif
#ifdef BB_FEATURE_TELNET_TTYPE
ttype = getenv("TERM");
#endif
memset(&G, 0, sizeof G);
if (tcgetattr(0, &G.termios_def) < 0)
exit(1);
G.termios_raw = G.termios_def;
cfmakeraw(&G.termios_raw);
if (argc < 2) show_usage();
port = (argc > 2)? getport(argv[2]): 23;
host = getserver(argv[1]);
G.netfd = remote_connect(host, port);
signal(SIGINT, fgotsig);
#ifdef USE_POLL
ufds[0].fd = 0; ufds[1].fd = G.netfd;
ufds[0].events = ufds[1].events = POLLIN;
#else
FD_ZERO(&readfds);
FD_SET(0, &readfds);
FD_SET(G.netfd, &readfds);
maxfd = G.netfd + 1;
#endif
while (1)
{
#ifndef USE_POLL
fd_set rfds = readfds;
switch (select(maxfd, &rfds, NULL, NULL, NULL))
#else
switch (poll(ufds, 2, -1))
#endif
{
case 0:
/* timeout */
case -1:
/* error, ignore and/or log something, bay go to loop */
if (G.gotsig)
conescape();
else
sleep(1);
break;
default:
#ifdef USE_POLL
if (ufds[0].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(0, &rfds))
#endif
{
len = read(0, G.buf, DATABUFSIZE);
if (len <= 0)
doexit(0);
TRACE(0, ("Read con: %d\n", len));
handlenetoutput(len);
}
#ifdef USE_POLL
if (ufds[1].revents) /* well, should check POLLIN, but ... */
#else
if (FD_ISSET(G.netfd, &rfds))
#endif
{
len = read(G.netfd, G.buf, DATABUFSIZE);
if (len <= 0)
{
WriteCS(1, "Connection closed by foreign host.\r\n");
doexit(1);
}
TRACE(0, ("Read netfd (%d): %d\n", G.netfd, len));
handlenetinput(len);
}
}
}
}