Jean-Paul Calderone wrote:
sys.stdout.write('Password: ');
#IAC DO ECHO sys.stdout.write('\xFF\xFB\x01')
password = raw_input()
If the client sends 'qwerty\r\n' everything is fine and the password
get stored in the variable. But sometimes, depending on how broken
the telnet client are, the client will send 'qwerty\r\000' instead
and then my application will hang at 'password = raw_input()' forever.
Any suggestions?
It sounds like you might want to use a real implementation of the telnet
protocol in your application. Such an implementation would deal with the
fact that telnet encodes \r as \r\0 for you.
Twisted includes a telnet implementation, as well as facilities for
reading
stdin asynchronously (which will let you avoid indefinite hangs).
I am running this script inside a wrapper (honeyd), so i cant really use
twisted since i don't have raw network access - i only got stdout, stdin
and stderr to play with.
But i found a solution, posting it here for the archives:
password = ""
while 1:
c = sys.stdin.read(1)
if c == '\r' or c == '\n':
break
password = password + c
Regards,
jkv
--
http://mail.python.org/mailman/listinfo/python-list
