commit 1c6f8841f47d5d55e73d18a9414fc68377a13c0e Author: Andrea Shepard andrea@torproject.org Date: Fri Oct 14 00:15:30 2016 +0000

Refactor to always allocate chosen_entry_guards in new guard_selection_new() function --- src/or/entrynodes.c | 50 +++++++++++++++++++++++++++++--------------------- 1 file changed, 29 insertions(+), 21 deletions(-)

diff --git a/src/or/entrynodes.c b/src/or/entrynodes.c index e5b2492..5cd2b72 100644 --- a/src/or/entrynodes.c +++ b/src/or/entrynodes.c @@ -98,6 +98,7 @@ static const node_t *choose_random_entry_impl(guard_selection_t *gs, int for_directory, dirinfo_type_t dirtype, int *n_options_out); +static guard_selection_t * guard_selection_new(void); static int num_bridges_usable(void);

/* Default number of entry guards in the case where the NumEntryGuards @@ -108,6 +109,19 @@ static int num_bridges_usable(void); #define MIN_N_GUARDS 1 #define MAX_N_GUARDS 10

+/** Allocate a new guard_selection_t */ + +static guard_selection_t * +guard_selection_new(void) +{ + guard_selection_t *gs; + + gs = tor_malloc_zero(sizeof(*gs)); + gs->chosen_entry_guards = smartlist_new(); + + return gs; +} + /** Get current default guard_selection_t, creating it if necessary */ guard_selection_t * get_guard_selection_info(void) @@ -117,7 +131,7 @@ get_guard_selection_info(void) }

if (!curr_guard_context) { - curr_guard_context = tor_malloc_zero(sizeof(*curr_guard_context)); + curr_guard_context = guard_selection_new(); smartlist_add(guard_contexts, curr_guard_context); }

@@ -130,10 +144,7 @@ const smartlist_t * get_entry_guards_for_guard_selection(guard_selection_t *gs) { tor_assert(gs != NULL); - - if (!(gs->chosen_entry_guards)) { - gs->chosen_entry_guards = smartlist_new(); - } + tor_assert(gs->chosen_entry_guards != NULL);

return gs->chosen_entry_guards; } @@ -492,6 +503,7 @@ add_an_entry_guard(guard_selection_t *gs, entry_guard_t *entry;

tor_assert(gs != NULL); + tor_assert(gs->chosen_entry_guards != NULL);

if (chosen) { node = chosen; @@ -558,10 +570,6 @@ add_an_entry_guard(guard_selection_t *gs, if (!for_discovery) entry->made_contact = 1;

- if (gs->chosen_entry_guards == NULL) { - gs->chosen_entry_guards = smartlist_new(); - } - if (prepend) smartlist_insert(gs->chosen_entry_guards, 0, entry); else @@ -608,9 +616,7 @@ pick_entry_guards(guard_selection_t *gs, const int num_needed = decide_num_guards(options, for_directory);

tor_assert(gs != NULL); - if (gs->chosen_entry_guards == NULL) { - gs->chosen_entry_guards = smartlist_new(); - } + tor_assert(gs->chosen_entry_guards != NULL);

while (num_live_entry_guards_for_guard_selection(gs, for_directory) < num_needed) { @@ -1297,13 +1303,11 @@ choose_random_entry_impl(guard_selection_t *gs, int retval = 0;

tor_assert(gs != NULL); + tor_assert(gs->chosen_entry_guards != NULL);

if (n_options_out) *n_options_out = 0;

- if (!(gs->chosen_entry_guards)) - gs->chosen_entry_guards = smartlist_new(); - if (gs->should_add_entry_nodes) entry_guards_set_from_config(gs, options);

@@ -1726,14 +1730,15 @@ entry_guards_update_state(or_state_t *state) config_line_t **next, *line; guard_selection_t *gs = get_guard_selection_info();

+ tor_assert(gs != NULL); + tor_assert(gs->chosen_entry_guards != NULL); + if (!gs->dirty) return;

config_free_lines(state->EntryGuards); next = &state->EntryGuards; *next = NULL; - if (!(gs->chosen_entry_guards)) - gs->chosen_entry_guards = smartlist_new(); SMARTLIST_FOREACH_BEGIN(gs->chosen_entry_guards, entry_guard_t *, e) { char dbuf[HEX_DIGEST_LEN+1]; if (!e->made_contact) @@ -1819,6 +1824,9 @@ getinfo_helper_entry_guards(control_connection_t *conn, { guard_selection_t *gs = get_guard_selection_info();

+ tor_assert(gs != NULL); + tor_assert(gs->chosen_entry_guards != NULL); + (void) conn; (void) errmsg;

@@ -1827,8 +1835,7 @@ getinfo_helper_entry_guards(control_connection_t *conn, smartlist_t *sl = smartlist_new(); char tbuf[ISO_TIME_LEN+1]; char nbuf[MAX_VERBOSE_NICKNAME_LEN+1]; - if (!(gs->chosen_entry_guards)) - gs->chosen_entry_guards = smartlist_new(); + SMARTLIST_FOREACH_BEGIN(gs->chosen_entry_guards, entry_guard_t *, e) { const char *status = NULL; time_t when = 0; @@ -2720,8 +2727,9 @@ entries_retry_helper(const or_options_t *options, int act) int need_bridges = options->UseBridges != 0; guard_selection_t *gs = get_guard_selection_info();

- if (!(gs->chosen_entry_guards)) - gs->chosen_entry_guards = smartlist_new(); + tor_assert(gs != NULL); + tor_assert(gs->chosen_entry_guards != NULL); + SMARTLIST_FOREACH_BEGIN(gs->chosen_entry_guards, entry_guard_t *, e) { node = node_get_by_id(e->identity); if (node && node_has_descriptor(node) &&