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Merge remote-tracking branch 'public/ticket23856_025_01' into maint-0.2.5

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Nick Mathewson 2017-12-11 16:53:02 -05:00
commit f5d4bdf305
3 changed files with 7 additions and 3 deletions
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4
changes/ticket23856 Normal file
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@ -0,0 +1,4 @@
o Minor feature (relay statistics):
- Change relay bandwidth reporting stats interval from 4 hours to 24 hours
in order to reduce the efficiency of guard discovery attacks. Fixes
ticket 23856.

4
src/or/rephist.c
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@ -1131,9 +1131,9 @@ rep_hist_load_mtbf_data(time_t now)
* totals? */ * totals? */
#define NUM_SECS_ROLLING_MEASURE 10 #define NUM_SECS_ROLLING_MEASURE 10
/** How large are the intervals for which we track and report bandwidth use? */ /** How large are the intervals for which we track and report bandwidth use? */
#define NUM_SECS_BW_SUM_INTERVAL (4*60*60) #define NUM_SECS_BW_SUM_INTERVAL (24*60*60)
/** How far in the past do we remember and publish bandwidth use? */ /** How far in the past do we remember and publish bandwidth use? */
#define NUM_SECS_BW_SUM_IS_VALID (24*60*60) #define NUM_SECS_BW_SUM_IS_VALID (5*24*60*60)
/** How many bandwidth usage intervals do we remember? (derived) */ /** How many bandwidth usage intervals do we remember? (derived) */
#define NUM_TOTALS (NUM_SECS_BW_SUM_IS_VALID/NUM_SECS_BW_SUM_INTERVAL) #define NUM_TOTALS (NUM_SECS_BW_SUM_IS_VALID/NUM_SECS_BW_SUM_INTERVAL)

2
src/or/router.c
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@ -2064,7 +2064,7 @@ mark_my_descriptor_dirty(const char *reason)
/** How frequently will we republish our descriptor because of large (factor /** How frequently will we republish our descriptor because of large (factor
* of 2) shifts in estimated bandwidth? */ * of 2) shifts in estimated bandwidth? */
#define MAX_BANDWIDTH_CHANGE_FREQ (20*60) #define MAX_BANDWIDTH_CHANGE_FREQ (3*60*60)
/** Check whether bandwidth has changed a lot since the last time we announced /** Check whether bandwidth has changed a lot since the last time we announced
* bandwidth. If so, mark our descriptor dirty. */ * bandwidth. If so, mark our descriptor dirty. */