Add discard_from_cache().

This function will delete a named entry from cache, if it exists and if
caching is turned on.

2 files changed, 25 insertions, 0 deletions

diff --git a/cache.c b/cache.c
index 69d8545..e775cf3 100644
--- a/cache.c
+++ b/cache.c
@@ -192,3 +192,22 @@ cached_ldap_rdatalist_get(isc_mem_t *mctx, ldap_cache_t *cache,
 cleanup:
 	return result;
 }
+
+isc_result_t
+discard_from_cache(ldap_cache_t *cache, dns_name_t *name)
+{
+	isc_result_t result;
+
+	REQUIRE(cache != NULL);
+	REQUIRE(name != NULL);
+
+	if (cache->rbt == NULL)
+		result = ISC_R_SUCCESS;
+	else
+		result = dns_rbt_deletename(cache->rbt, name, ISC_FALSE);
+
+	if (result == ISC_R_NOTFOUND)
+		result = ISC_R_SUCCESS;
+
+	return result;
+}
diff --git a/cache.h b/cache.h
index fcffd49..a8f0558 100644
--- a/cache.h
+++ b/cache.h
@@ -48,5 +48,11 @@ cached_ldap_rdatalist_get(isc_mem_t *mctx, ldap_cache_t *cache,
 			  ldap_db_t *ldap_db, dns_name_t *name,
 			  ldapdb_rdatalist_t *rdatalist);
 
+/*
+ * Discard 'name' from the cache. If caching is not really turned on or 'name'
+ * is not cached, this function will still return ISC_R_SUCCESS.
+ */
+isc_result_t
+discard_from_cache(ldap_cache_t *cache, dns_name_t *name);
 
 #endif /* !_LD_CACHE_H_ */