commit df8256a931099767d9f70997c9eb1ef934afd392 Author: Nick Mathewson nickm@torproject.org Date: Mon Nov 14 13:27:35 2016 -0500

Add the prop271 fields to entry_guard_t. Not used yet. --- src/or/entrynodes.c | 1 + src/or/entrynodes.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+)

diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c index 7890f83..bd4d83c 100644 --- a/src/or/entrynodes.c +++ b/src/or/entrynodes.c @@ -683,6 +683,7 @@ entry_guard_free(entry_guard_t *e) if (!e) return; tor_free(e->chosen_by_version); + tor_free(e->sampled_by_version); tor_free(e); }

diff --git a/src/or/entrynodes.h b/src/or/entrynodes.h index 2e18a2f..4f39a09 100644 --- a/src/or/entrynodes.h +++ b/src/or/entrynodes.h @@ -18,6 +18,10 @@ typedef struct guard_selection_s guard_selection_t; /* Forward declare for entry_guard_t; the real declaration is private. */ typedef struct entry_guard_t entry_guard_t;

+#define GUARD_REACHABLE_NO 0 +#define GUARD_REACHABLE_YES 1 +#define GUARD_REACHABLE_MAYBE 2 + /* Information about a guard's pathbias status. * These fields are used in circpathbias.c to try to detect entry * nodes that are failing circuits at a suspicious frequency. @@ -61,6 +65,43 @@ typedef struct guard_pathbias_t { struct entry_guard_t { char nickname[MAX_NICKNAME_LEN+1]; char identity[DIGEST_LEN]; + ed25519_public_key_t ed_id; + + /* XXXX prop271 DOCDOC document all these fields better */ + + /* Persistent fields, present for all sampled guards. */ + time_t sampled_on_date; + time_t unlisted_since_date; + char *sampled_by_version; + unsigned currently_listed : 1; + + /* Persistent fields, for confirmed guards. */ + time_t confirmed_on_date; /* 0 if not confirmed */ + int confirmed_idx; /* -1 if not confirmed; otherwise the order that this + * item should occur in the CONFIRMED_GUARDS ordered + * list */ + + /* ==== Non-persistent fields. */ + /* == These are used by sampled guards */ + time_t last_tried_to_connect; + unsigned is_reachable : 2; /* One of GUARD_REACHABLE_{NO,YES,MAYBE} */ + unsigned is_pending : 1; + time_t failing_since; + + /* These determine presence in filtered guards and usable-filtered-guards + * respectively. */ + unsigned is_filtered_guard : 1; + unsigned is_usable_filtered_guard : 1; + + /** + * @name legacy guard selection algorithm fields + * + * These are used and maintained by the legacy (pre-prop271) entry guard + * algorithm. Most of them we will remove as prop271 gets implemented. + * The rest we'll migrate over, if they are 100% semantically identical to + * their prop271 equivalents. XXXXprop271 + */ + /**@{*/ time_t chosen_on_date; /**< Approximately when was this guard added? * "0" if we don't know. */ char *chosen_by_version; /**< What tor version added this guard? NULL @@ -79,6 +120,8 @@ struct entry_guard_t { time_t last_attempted; /**< 0 if we can connect to this guard, or the time * at which we last failed to connect to it. */

+ /**}@*/ + /** Path bias information for this guard. */ guard_pathbias_t pb; };