diff options
Diffstat (limited to 'src/or/entrynodes.c')
| -rw-r--r-- | src/or/entrynodes.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c index d029d85935..dab081d1fc 100644 --- a/src/or/entrynodes.c +++ b/src/or/entrynodes.c @@ -64,8 +64,7 @@ static int entry_guards_dirty = 0; static void bridge_free(bridge_info_t *bridge); static const node_t *choose_random_entry_impl(cpath_build_state_t *state, int for_directory, - dirinfo_type_t dirtype, - int prefer_microdescs); + dirinfo_type_t dirtype); /** Return the list of entry guards, creating it if necessary. */ const smartlist_t * @@ -844,20 +843,28 @@ node_understands_microdescriptors(const node_t *node) return 0; } +/** Return true iff <b>node</b> is able to answer directory questions + * of type <b>dirinfo</b>. */ +static int +node_can_handle_dirinfo(const node_t *node, dirinfo_type_t dirinfo) +{ + if ((dirinfo & MICRODESC_DIRINFO) && + !node_understands_microdescriptors(node)) + return 0; + return 1; +} + /** Pick a live (up and listed) entry guard from entry_guards. If * <b>state</b> is non-NULL, this is for a specific circuit -- * make sure not to pick this circuit's exit or any node in the * exit's family. If <b>state</b> is NULL, we're looking for a random - * guard (likely a bridge). - * - * If the prefer_microdescs flag is set, we are looking for a bridge to - * use for directory fetching and pick a bridge that supports microdescriptors - * if we know any that do so. - */ + * guard (likely a bridge). If <b>dirinfo</b> is not NO_DIRINFO, then + * only select from nodes that know how to answer directory questions + * of that type. */ const node_t * -choose_random_entry(cpath_build_state_t *state, int prefer_microdescs) +choose_random_entry(cpath_build_state_t *state, dirinfo_type_t dirinfo) { - return choose_random_entry_impl(state, 0, 0, prefer_microdescs); + return choose_random_entry_impl(state, 0, dirinfo); } /** Pick a live (up and listed) directory guard from entry_guards for @@ -865,13 +872,13 @@ choose_random_entry(cpath_build_state_t *state, int prefer_microdescs) const node_t * choose_random_dirguard(dirinfo_type_t type) { - return choose_random_entry_impl(NULL, 1, type, 0); + return choose_random_entry_impl(NULL, 1, type); } /** Helper for choose_random{entry,dirguard}. */ static const node_t * choose_random_entry_impl(cpath_build_state_t *state, int for_directory, - dirinfo_type_t dirinfo_type, int prefer_microdescs) + dirinfo_type_t dirinfo_type) { const or_options_t *options = get_options(); smartlist_t *live_entry_guards = smartlist_new(); @@ -923,9 +930,8 @@ choose_random_entry_impl(cpath_build_state_t *state, int for_directory, continue; /* don't pick the same node for entry and exit */ if (consider_exit_family && smartlist_contains(exit_family, node)) continue; /* avoid relays that are family members of our exit */ - if (prefer_microdescs && - we_use_microdescriptors_for_circuits(options) && - !node_understands_microdescriptors(node)) + if (dirinfo_type != NO_DIRINFO && + !node_can_handle_dirinfo(node, dirinfo_type)) continue; /* this node won't be able to answer our dir questions */ #if 0 /* since EntryNodes is always strict now, this clause is moot */ if (options->EntryNodes && @@ -2006,7 +2012,7 @@ int any_bridge_descriptors_known(void) { tor_assert(get_options()->UseBridges); - return choose_random_entry(NULL, 0)!=NULL ? 1 : 0; + return choose_random_entry(NULL, NO_DIRINFO)!=NULL ? 1 : 0; } /** Return 1 if there are any directory conns fetching bridge descriptors |