/* Use dirserv_compute_performance_thresholds() to compute the thresholds
* for the status flags, specifically for bridges.
*
* This is only called by a Bridge Authority from
* networkstatus_getinfo_by_purpose().
*/
void
dirserv_compute_bridge_flag_thresholds(void)
{
digestmap_t *omit_as_sybil = digestmap_new();
dirserv_compute_performance_thresholds(omit_as_sybil);
digestmap_free(omit_as_sybil, NULL);
}
/** Clear and free the measured bandwidth cache */
void
dirserv_clear_measured_bw_cache(void)
{
if (mbw_cache) {
/* Free the map and all entries */
digestmap_free(mbw_cache, tor_free_);
mbw_cache = NULL;
}
}
/** Free all storage held by the service descriptor cache. */
void
rend_cache_free_all(void)
{
strmap_free(rend_cache, rend_cache_entry_free_);
digestmap_free(rend_cache_v2_dir, rend_cache_entry_free_);
strmap_free(rend_cache_failure, rend_cache_failure_entry_free_);
rend_cache = NULL;
rend_cache_v2_dir = NULL;
rend_cache_failure = NULL;
rend_cache_total_allocation = 0;
}
void
replaycache_free(replaycache_t *r)
{
if (!r) {
log_info(LD_BUG, "replaycache_free() called on NULL");
return;
}
if (r->digests_seen) digestmap_free(r->digests_seen, _tor_free);
tor_free(r);
}
/* Free a state that was allocated with state_new(). */
static void
state_free_(sr_state_t *state)
{
if (state == NULL) {
return;
}
tor_free(state->fname);
digestmap_free(state->commits, commit_free_);
tor_free(state->current_srv);
tor_free(state->previous_srv);
tor_free(state);
}
/** Helper: free a rend cache failure object. */
STATIC void
rend_cache_failure_entry_free_(rend_cache_failure_t *entry)
{
if (entry == NULL) {
return;
}
/* Free and remove every intro failure object. */
digestmap_free(entry->intro_failures,
rend_cache_failure_intro_entry_free_void);
tor_free(entry);
}
/** Scan the measured bandwidth cache and remove expired entries */
STATIC void
dirserv_expire_measured_bw_cache(time_t now)
{
if (mbw_cache) {
/* Iterate through the cache and check each entry */
DIGESTMAP_FOREACH_MODIFY(mbw_cache, k, mbw_cache_entry_t *, e) {
if (now > e->as_of + MAX_MEASUREMENT_AGE) {
tor_free(e);
MAP_DEL_CURRENT(k);
}
} DIGESTMAP_FOREACH_END;
/* Check if we cleared the whole thing and free if so */
if (digestmap_size(mbw_cache) == 0) {
digestmap_free(mbw_cache, tor_free_);
mbw_cache = 0;
}
}
}
/** Run digestmap_t performance benchmarks. */
static void
bench_dmap(void)
{
smartlist_t *sl = smartlist_new();
smartlist_t *sl2 = smartlist_new();
uint64_t start, end, pt2, pt3, pt4;
int iters = 8192;
const int elts = 4000;
const int fpostests = 100000;
char d[20];
int i,n=0, fp = 0;
digestmap_t *dm = digestmap_new();
digestset_t *ds = digestset_new(elts);
for (i = 0; i < elts; ++i) {
crypto_rand(d, 20);
smartlist_add(sl, tor_memdup(d, 20));
}
for (i = 0; i < elts; ++i) {
crypto_rand(d, 20);
smartlist_add(sl2, tor_memdup(d, 20));
}
printf("nbits=%d\n", ds->mask+1);
reset_perftime();
start = perftime();
for (i = 0; i < iters; ++i) {
SMARTLIST_FOREACH(sl, const char *, cp, digestmap_set(dm, cp, (void*)1));
}
pt2 = perftime();
printf("digestmap_set: %.2f ns per element\n",
NANOCOUNT(start, pt2, iters*elts));
for (i = 0; i < iters; ++i) {
SMARTLIST_FOREACH(sl, const char *, cp, digestmap_get(dm, cp));
SMARTLIST_FOREACH(sl2, const char *, cp, digestmap_get(dm, cp));
}
pt3 = perftime();
printf("digestmap_get: %.2f ns per element\n",
NANOCOUNT(pt2, pt3, iters*elts*2));
for (i = 0; i < iters; ++i) {
SMARTLIST_FOREACH(sl, const char *, cp, digestset_add(ds, cp));
}
pt4 = perftime();
printf("digestset_add: %.2f ns per element\n",
NANOCOUNT(pt3, pt4, iters*elts));
for (i = 0; i < iters; ++i) {
SMARTLIST_FOREACH(sl, const char *, cp, n += digestset_isin(ds, cp));
SMARTLIST_FOREACH(sl2, const char *, cp, n += digestset_isin(ds, cp));
}
end = perftime();
printf("digestset_isin: %.2f ns per element.\n",
NANOCOUNT(pt4, end, iters*elts*2));
/* We need to use this, or else the whole loop gets optimized out. */
printf("Hits == %d\n", n);
for (i = 0; i < fpostests; ++i) {
crypto_rand(d, 20);
if (digestset_isin(ds, d)) ++fp;
}
printf("False positive rate on digestset: %.2f%%\n",
(fp/(double)fpostests)*100);
digestmap_free(dm, NULL);
digestset_free(ds);
SMARTLIST_FOREACH(sl, char *, cp, tor_free(cp));
SMARTLIST_FOREACH(sl2, char *, cp, tor_free(cp));
smartlist_free(sl);
smartlist_free(sl2);
}