__init__(self, receive, make_send, nconnect=-1, timeout=60.0)
(Constructor)

A Tunnel relays connections from a 'receive' socket to one or more 'send' sockets. The receive socket must be bound and listening. For each incoming connection, a new send socket is created by calling make_send(). Data is then exchanged between the created streams until one socket is closed. nconnect is the maximum number of simultaneous connections (-1 for infinite), and timeout is the time that a single connection can last for (None allows a connection to last forever).

Sockets must accept stream traffic and support the Python socket interface. A separate daemonic thread is created to manage the tunnel. For high performance, make_send() should make a socket and connect in non-blocking mode (you should catch and discard the socket.BlockError or socket.error due to executing connect on a non-blocking socket).

Security Note: A firewall is needed to maintain the end user's anonymity. An attacker could keep a tunnel socket open by pinging it regularly. The accepted sockets from 'receive' must prevent this by closing down eventually.

close(self)

_run(self)