int STREAMDoPostConnect(STREAM *S, int Flags)
{
int result=TRUE;
char *ptr;
struct timeval tv;
if ((S->in_fd > -1) && (S->Timeout > 0) )
{
tv.tv_sec=S->Timeout;
tv.tv_usec=0;
if (FDSelect(S->in_fd, SELECT_WRITE, &tv) <=0)
{
close(S->in_fd);
S->in_fd=-1;
S->out_fd=-1;
}
else if (! (Flags & CONNECT_NONBLOCK)) STREAMSetNonBlock(S, FALSE);
}
if (S->in_fd > -1)
{
S->Type=STREAM_TYPE_TCP;
result=TRUE;
STREAMSetFlushType(S,FLUSH_LINE,0);
}
//if (Flags & CONNECT_SOCKS_PROXY) result=DoSocksProxyTunnel(S);
if (Flags & CONNECT_SSL) DoSSLClientNegotiation(S, Flags);
ptr=GetRemoteIP(S->in_fd);
if (ptr) STREAMSetValue(S,"PeerIP",ptr);
return(result);
}
int FDIsWritable(int fd)
{
struct timeval tv;
tv.tv_sec=0;
tv.tv_usec=0;
if (FDSelect(fd, SELECT_WRITE, &tv) & SELECT_WRITE) return(TRUE);
return(FALSE);
}
int FDCheckForBytes(int fd)
{
struct timeval tv;
tv.tv_sec=0;
tv.tv_usec=0;
if (FDSelect(fd, SELECT_READ, &tv) & SELECT_READ) return(TRUE);
return(FALSE);
}
void PTelnetDServerMode()
{
int listensock, fd, i;
struct sigaction sigact;
char *Tempstr=NULL, *IPStr=NULL;
listensock=InitServerSock(Settings.Interface,Settings.Port);
if (listensock==-1)
{
printf("ERROR: Cannot bind to port %d on interface %s\n",Settings.Port,Settings.Interface);
exit(3);
}
if (! (Settings.Flags & FLAG_NODEMON)) demonize();
SetupPidFile();
if (Settings.Flags & FLAG_HONEYPOT) JailAndSwitchUser(FLAG_CHROOT, Settings.RealUser, Settings.ChDir);
while (1)
{
/*Set up a signal handler for SIGCHLD so that our 'select' gets interrupted when something exits*/
sigact.sa_handler = default_signal_handler;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
sigaction(SIGCHLD, &sigact, NULL);
if (FDSelect(listensock, SELECT_READ, NULL))
{
fd=TCPServerSockAccept(listensock, &IPStr);
if (fork()==0)
{
//Sub processes shouldn't keep the pid file open, only the parent server
//should
close(PidFile);
//if we've been passed a socket, then make it into stdin/stdout/stderr
//but don't do this is fd==0, because then this has already been done by inetd
close(0);
close(1);
close(2);
dup(fd);
dup(fd);
dup(fd);
//Having dupped it we no longer need to keep this copy open
close(fd);
Tempstr=MCopyStr(Tempstr, g_argv[0]," ",IPStr,NULL);
for (i=0; i <g_argc; i++) memset(g_argv[i],0,StrLen(g_argv[i]));
strcpy(g_argv[0],Tempstr);
//In case logging demon was restarted, ensure we have connection before we chroot
//Eric Wedaa modified the following line to log to the LongTail honeypot consolidation server
openlog("ptelnetd",LOG_PID|LOG_NDELAY,LOG_AUTH);
HandleClient();
//Should be redundant, but if something goes wrong in HandleClient, we might want this
//exit call
_exit(0);
}
close(fd);
}
waitpid(-1,NULL,WNOHANG);
}
}
