static void inetbind(void)
{
int s, port;
struct sockaddr_in addr;
int len = sizeof(addr);
int one = 1;
struct servent *se;
if ((se = getservbyname("identd", "tcp")) == NULL)
port = IDENT_PORT;
else
port = se->s_port;
s = bb_xsocket(AF_INET, SOCK_STREAM, 0);
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
memset(&addr, 0, sizeof(addr));
addr.sin_addr.s_addr = inet_addr(bind_ip_address);
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
bb_xbind(s, (struct sockaddr *)&addr, len);
bb_xlisten(s, 5);
movefd(s, 0);
}
int nc_main(int argc, char **argv)
{
int do_listen = 0, lport = 0, delay = 0, wsecs = 0, tmpfd, opt, sfd, x;
#ifdef CONFIG_NC_GAPING_SECURITY_HOLE
char *pr00gie = NULL;
#endif
struct sockaddr_in address;
struct hostent *hostinfo;
fd_set readfds, testfds;
while ((opt = getopt(argc, argv, "lp:i:e:w:")) > 0) {
switch (opt) {
case 'l':
do_listen++;
break;
case 'p':
lport = bb_lookup_port(optarg, "tcp", 0);
break;
case 'i':
delay = atoi(optarg);
break;
#ifdef CONFIG_NC_GAPING_SECURITY_HOLE
case 'e':
pr00gie = optarg;
break;
#endif
case 'w':
wsecs = atoi(optarg);
break;
default:
bb_show_usage();
}
}
if ((do_listen && optind != argc) || (!do_listen && optind + 2 != argc))
bb_show_usage();
sfd = bb_xsocket(AF_INET, SOCK_STREAM, 0);
x = 1;
if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &x, sizeof (x)) == -1)
bb_perror_msg_and_die("reuseaddr");
address.sin_family = AF_INET;
if (wsecs) {
signal(SIGALRM, timeout);
alarm(wsecs);
}
if (lport != 0) {
memset(&address.sin_addr, 0, sizeof(address.sin_addr));
address.sin_port = lport;
bb_xbind(sfd, (struct sockaddr *) &address, sizeof(address));
}
if (do_listen) {
socklen_t addrlen = sizeof(address);
bb_xlisten(sfd, 1);
if ((tmpfd = accept(sfd, (struct sockaddr *) &address, &addrlen)) < 0)
bb_perror_msg_and_die("accept");
close(sfd);
sfd = tmpfd;
} else {
hostinfo = xgethostbyname(argv[optind]);
address.sin_addr = *(struct in_addr *) *hostinfo->h_addr_list;
address.sin_port = bb_lookup_port(argv[optind+1], "tcp", 0);
if (connect(sfd, (struct sockaddr *) &address, sizeof(address)) < 0)
bb_perror_msg_and_die("connect");
}
if (wsecs) {
alarm(0);
signal(SIGALRM, SIG_DFL);
}
#ifdef CONFIG_NC_GAPING_SECURITY_HOLE
/* -e given? */
if (pr00gie) {
dup2(sfd, 0);
close(sfd);
dup2(0, 1);
dup2(0, 2);
execl(pr00gie, pr00gie, NULL);
/* Don't print stuff or it will go over the wire.... */
_exit(-1);
}
#endif /* CONFIG_NC_GAPING_SECURITY_HOLE */
FD_ZERO(&readfds);
FD_SET(sfd, &readfds);
FD_SET(STDIN_FILENO, &readfds);
while (1) {
int fd;
int ofd;
int nread;
testfds = readfds;
if (select(FD_SETSIZE, &testfds, NULL, NULL, NULL) < 0)
bb_perror_msg_and_die("select");
for (fd = 0; fd < FD_SETSIZE; fd++) {
if (FD_ISSET(fd, &testfds)) {
if ((nread = safe_read(fd, bb_common_bufsiz1,
sizeof(bb_common_bufsiz1))) < 0)
{
bb_perror_msg_and_die(bb_msg_read_error);
}
if (fd == sfd) {
if (nread == 0)
exit(0);
ofd = STDOUT_FILENO;
} else {
if (nread <= 0) {
shutdown(sfd, 1 /* send */ );
close(STDIN_FILENO);
FD_CLR(STDIN_FILENO, &readfds);
}
ofd = sfd;
}
if (bb_full_write(ofd, bb_common_bufsiz1, nread) < 0)
bb_perror_msg_and_die(bb_msg_write_error);
if (delay > 0) {
sleep(delay);
}
}
}
}
}