Allow consensus interval of 10 seconds when testing

Decrease minimum consensus interval to 10 seconds
when TestingTorNetwork is set. (Or 5 seconds for
the first consensus.)

Fix code that assumes larger interval values.

This assists in quickly bootstrapping a testing
Tor network.

Fixes bugs 13718 & 13823.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c
index 21efdd129d..9b24405951 100644
--- a/src/or/networkstatus.c
+++ b/src/or/networkstatus.c
@@ -832,6 +832,10 @@ update_consensus_networkstatus_fetch_time_impl(time_t now, int flav)
          a crazy-fast voting interval, though, 2 minutes may be too
          much. */
       min_sec_before_caching = interval/16;
+      /* make sure we always delay by at least a second before caching */
+      if (min_sec_before_caching == 0) {
+        min_sec_before_caching = 1;
+      }
     }
 
     if (directory_fetches_dir_info_early(options)) {
@@ -863,8 +867,16 @@ update_consensus_networkstatus_fetch_time_impl(time_t now, int flav)
         dl_interval = (c->valid_until - start) - min_sec_before_caching;
       }
     }
+    /* catch low dl_interval in crazy-fast networks */
     if (dl_interval < 1)
       dl_interval = 1;
+    /* catch late start in crazy-fast networks */
+    if (start+dl_interval >= c->valid_until)
+      start = c->valid_until - dl_interval - 1;
+    log_debug(LD_DIR,
+              "fresh_until: %ld start: %ld "
+              "dl_interval: %ld valid_until: %ld ",
+              c->fresh_until, start, dl_interval, c->valid_until);
     /* We must not try to replace c while it's still fresh: */
     tor_assert(c->fresh_until < start);
     /* We must download the next one before c is invalid: */