commit 930fbb2fec2b0c4e56cc4f10f8faec9d0d135274 Author: Mike Perry mikeperry-git@fscked.org Date: Sun Dec 9 19:18:04 2012 -0800
Flag cannibalized circs as used (non-ideal).
Also add some comments. --- src/or/circuitbuild.c | 4 ++++ src/or/circuituse.c | 17 ++++++++++++++++- 2 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/src/or/circuitbuild.c b/src/or/circuitbuild.c index c3a5827..7282d57 100644 --- a/src/or/circuitbuild.c +++ b/src/or/circuitbuild.c @@ -1219,6 +1219,10 @@ pathbias_count_first_hop(origin_circuit_t *circ) return 0; }
+ // XXX: Technically, we could make this only count from the *second* hop.. + // Until we get per-hop MACs or a lower circ failure rate, this might be + // better from a false positive POV. Should we s/first_hop/circ_attempt/g? + // Then we can control this check from the consensus. if (circ->cpath->state == CPATH_STATE_AWAITING_KEYS) { /* Help track down the real cause of bug #6475: */ if (circ->has_opened && circ->path_state != PATH_STATE_DID_FIRST_HOP) { diff --git a/src/or/circuituse.c b/src/or/circuituse.c index 0b799b1..781e984 100644 --- a/src/or/circuituse.c +++ b/src/or/circuituse.c @@ -1160,6 +1160,17 @@ circuit_has_opened(origin_circuit_t *circ) { control_event_circuit_status(circ, CIRC_EVENT_BUILT, 0);
+ /* Cannibalized circuits count as used for path bias. + * (PURPOSE_GENERAL circs especially, since they are + * marked dirty and often go unused after preemptive + * building). */ + // XXX: Cannibalized now use RELAY_EARLY, which is visible + // to taggers end-to-end! We really need to probe these instead. + if (circ->has_opened && + circ->build_state->desired_path_len > DEFAULT_ROUTE_LEN) { + circ->path_state = PATH_STATE_USE_SUCCEEDED; + } + /* Remember that this circuit has finished building. Now if we start * it building again later (e.g. by extending it), we will know not * to consider its build time. */ @@ -1411,7 +1422,11 @@ circuit_launch_by_extend_info(uint8_t purpose, * * Same deal goes for client side introductions. Clients * can be manipulated to connect repeatedly to them - * (especially web clients). */ + * (especially web clients). + * + * If we decide to probe the initial portion of these circs, + * (up to the adversaries final hop), we need to remove this. + */ circ->path_state = PATH_STATE_USE_SUCCEEDED; /* This must be called before the purpose change */ pathbias_check_close(circ);