finally get rid of "clique mode"

changes/kill_clique_mode

@@ -0,0 +1,4 @@
+  o Minor features:
+    - Finally get rid of the deprecated and now harmful notion of
+      "clique mode", where directory authorities maintain TLS connections
+      to every other relay.

src/or/main.c

@@ -751,7 +751,6 @@ run_connection_housekeeping(int i, time_t now)
   /* If we haven't written to an OR connection for a while, then either nuke
      the connection or send a keepalive, depending. */
   if (now >= conn->timestamp_lastwritten + options->KeepalivePeriod) {
-    routerinfo_t *router = router_get_by_digest(or_conn->identity_digest);
     int maxCircuitlessPeriod = options->MaxCircuitDirtiness*3/2;
     if (!connection_state_is_open(conn)) {
       /* We never managed to actually get this connection open and happy. */
@@ -767,14 +766,11 @@ run_connection_housekeeping(int i, time_t now)
                conn->s,conn->address, conn->port);
       connection_mark_for_close(conn);
       conn->hold_open_until_flushed = 1;
-    } else if (!clique_mode(options) && !or_conn->n_circuits &&
+    } else if (!or_conn->n_circuits &&
                now >= or_conn->timestamp_last_added_nonpadding +
-                                           maxCircuitlessPeriod &&
-               (!router || !server_mode(options) ||
-                !router_is_clique_mode(router))) {
+                                           maxCircuitlessPeriod) {
       log_info(LD_OR,"Expiring non-used OR connection to fd %d (%s:%d) "
-               "[Not in clique mode].",
-               conn->s,conn->address, conn->port);
+               "[idle].", conn->s,conn->address, conn->port);
       connection_mark_for_close(conn);
       conn->hold_open_until_flushed = 1;
     } else if (
@@ -1661,7 +1657,7 @@ dumpmemusage(int severity)
   tor_log_mallinfo(severity);
 }
 
-/** Write all statistics to the log, with log level 'severity'.  Called
+/** Write all statistics to the log, with log level <b>severity</b>. Called
  * in response to a SIGUSR1. */
 static void
 dumpstats(int severity)

src/or/or.h

@@ -4813,13 +4813,11 @@ int authdir_mode_publishes_statuses(or_options_t *options);
 int authdir_mode_tests_reachability(or_options_t *options);
 int authdir_mode_bridge(or_options_t *options);
 
-int clique_mode(or_options_t *options);
 int server_mode(or_options_t *options);
 int advertised_server_mode(void);
 int proxy_mode(or_options_t *options);
 void consider_publishable_server(int force);
 
-int router_is_clique_mode(routerinfo_t *router);
 void router_upload_dir_desc_to_dirservers(int force);
 void mark_my_descriptor_dirty_if_older_than(time_t when);
 void mark_my_descriptor_dirty(void);

src/or/router.c

@@ -948,16 +948,6 @@ authdir_mode_bridge(or_options_t *options)
 {
   return authdir_mode(options) && options->BridgeAuthoritativeDir != 0;
 }
-/** Return true iff we once tried to stay connected to all ORs at once.
- * FFFF this function, and the notion of staying connected to ORs, is
- * nearly obsolete. One day there will be a proposal for getting rid of
- * it.
- */
-int
-clique_mode(or_options_t *options)
-{
-  return authdir_mode_tests_reachability(options);
-}
 
 /** Return true iff we are trying to be a server.
  */
@@ -1051,20 +1041,6 @@ consider_publishable_server(int force)
   }
 }
 
-/*
- * Clique maintenance -- to be phased out.
- */
-
-/** Return true iff we believe this OR tries to keep connections open
- * to all other ORs. */
-int
-router_is_clique_mode(routerinfo_t *router)
-{
-  if (router_digest_is_trusted_dir(router->cache_info.identity_digest))
-    return 1;
-  return 0;
-}
-
 /*
  * OR descriptor generation.
  */