mirror of
https://gitlab.torproject.org/tpo/core/tor.git
synced 2024-11-14 15:23:27 +01:00
45 lines
2.0 KiB
Plaintext
45 lines
2.0 KiB
Plaintext
Author: Geoff Goodell
|
|
Title: Allow controller to manage circuit extensions
|
|
Date: 12 March 2006
|
|
|
|
History:
|
|
|
|
This was once bug 268. Moving it into the proposal system for posterity.
|
|
|
|
Test:
|
|
|
|
Tor controllers should have a means of learning more about circuits built
|
|
through Tor routers. Specifically, if a Tor controller is connected to a Tor
|
|
router, it should be able to subscribe to a new class of events, perhaps
|
|
"onion" or "router" events. A Tor router SHOULD then ensure that the
|
|
controller is informed:
|
|
|
|
(a) (NEW) when it receives a connection from some other location, in which
|
|
case it SHOULD indicate (1) a unique identifier for the circuit, and (2) a
|
|
ServerID in the event of an OR connection from another Tor router, and
|
|
Hostname otherwise.
|
|
|
|
(b) (REQUEST) when it receives a request to extend an existing circuit to a
|
|
successive Tor router, in which case it SHOULD provide (1) the unique
|
|
identifier for the circuit, (2) a Hostname (or, if possible, ServerID) of the
|
|
previous Tor router in the circuit, and (3) a ServerID for the requested
|
|
successive Tor router in the circuit;
|
|
|
|
(c) (EXTEND) Tor will attempt to extend the circuit to some other router, in
|
|
which case it SHOULD provide the same fields as provided for REQUEST.
|
|
|
|
(d) (SUCCEEDED) The circuit has been successfully extended to some ther
|
|
router, in which case it SHOULD provide the same fields as provided for
|
|
REQUEST.
|
|
|
|
We also need a new configuration option analogous to _leavestreamsunattached,
|
|
specifying whether the controller is to manage circuit extensions or not.
|
|
Perhaps we can call it "_leavecircuitsunextended". When set to 0, Tor
|
|
manages everything as usual. When set to 1, a circuit received by the Tor
|
|
router cannot transition from "REQUEST" to "EXTEND" state without being
|
|
directed by a new controller command. The controller command probably does
|
|
not need any arguments, since circuits are extended per client source
|
|
routing, and all that the controller does is accept or reject the extension.
|
|
|
|
This feature can be used as a basis for enforcing routing policy.
|