tor

commit 961d2ad597134df0171dbbed2e035ae93e2215c6
parent 6aaafb0672ec7d2f454720ea0bed41fb91d9744e
Author: Roger Dingledine <arma@torproject.org>
Date:   Mon,  2 Apr 2018 00:20:01 -0400

dir auths no longer vote Guard if they're not voting V2Dir

Directory authorities no longer vote in favor of the Guard flag
for relays that don't advertise directory support.

Starting in Tor 0.3.0.1-alpha, Tor clients have been avoiding using
such relays in the Guard position, leading to increasingly broken load
balancing for the 5%-or-so of Guards that don't advertise directory
support.

Fixes bug 22310; bugfix on 0.3.0.6.

Diffstat:
A
changes/bug22310
 | 
8
++++++++
M
src/or/dirserv.c
 | 
1
+

2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/changes/bug22310 b/changes/bug22310
@@ -0,0 +1,8 @@
+  o Major bugfixes (performance, load balancing):
+    - Directory authorities no longer vote in favor of the Guard flag
+      for relays that don't advertise directory support. Starting in Tor
+      0.3.0.1-alpha, Tor clients have been avoiding using such relays in
+      the Guard position, leading to increasingly broken load balancing
+      for the 5%-or-so of Guards that don't advertise directory support.
+      Fixes bug 22310; bugfix on 0.3.0.6.
+
diff --git a/src/or/dirserv.c b/src/or/dirserv.c
@@ -2266,6 +2266,7 @@ set_routerstatus_from_routerinfo(routerstatus_t *rs,
   rs->is_valid = node->is_valid;
 
   if (node->is_fast && node->is_stable &&
+      ri->supports_tunnelled_dir_requests &&
       ((options->AuthDirGuardBWGuarantee &&
         routerbw_kb >= options->AuthDirGuardBWGuarantee/1000) ||
        routerbw_kb >= MIN(guard_bandwidth_including_exits_kb,