SR: Calculate current SRV phase/run duration.

This is also needed to make the HS desc overlap mode function
independent of absolute hours.

2 files changed, 18 insertions, 0 deletions

diff --git a/src/or/shared_random_state.c b/src/or/shared_random_state.c
index 1fc1440d0d..7f8094dafd 100644
--- a/src/or/shared_random_state.c
+++ b/src/or/shared_random_state.c
@@ -176,6 +176,22 @@ sr_state_get_start_time_of_current_protocol_run(time_t now)
   return beginning_of_current_round - time_elapsed_since_start_of_run;
 }
 
+/** Return the time (in seconds) it takes to complete a full SR protocol phase
+ *  (e.g. the commit phase). */
+unsigned int
+sr_state_get_phase_duration(void)
+{
+  return SHARED_RANDOM_N_ROUNDS * get_voting_interval();
+}
+
+/** Return the time (in seconds) it takes to complete a full SR protocol run */
+unsigned int
+sr_state_get_protocol_run_duration(void)
+{
+  int total_protocol_rounds = SHARED_RANDOM_N_ROUNDS * SHARED_RANDOM_N_PHASES;
+  return total_protocol_rounds * get_voting_interval();
+}
+
 /* Return the time we should expire the state file created at <b>now</b>.
  * We expire the state file in the beginning of the next protocol run. */
 STATIC time_t
diff --git a/src/or/shared_random_state.h b/src/or/shared_random_state.h
index ae1c5ac219..03dd5eb37e 100644
--- a/src/or/shared_random_state.h
+++ b/src/or/shared_random_state.h
@@ -122,6 +122,8 @@ void sr_state_save(void);
 void sr_state_free(void);
 
 time_t sr_state_get_start_time_of_current_protocol_run(time_t now);
+unsigned int sr_state_get_phase_duration(void);
+unsigned int sr_state_get_protocol_run_duration(void);
 
 #ifdef SHARED_RANDOM_STATE_PRIVATE