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Add the prop271 fields to entry_guard_t. Not used yet.

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This commit is contained in:
Nick Mathewson 2016-11-14 13:27:35 -05:00
parent 043e9b0151
commit df8256a931
2 changed files with 44 additions and 0 deletions
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1
src/or/entrynodes.c
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@ -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);
}

43
src/or/entrynodes.h
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@ -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;
};