res_pjsip: Use sorcery prefix operation for contact lookup

This improves performance for registrations assuming that
res_config_astdb is not in use.

Change-Id: I86f37aa9ef07a4fe63448cb881bbadd996834bb1

diff --git a/res/res_pjsip/location.c b/res/res_pjsip/location.c
index 0d7b3da..299fdb7 100644 (file)
--- a/res/res_pjsip/location.c
+++ b/res/res_pjsip/location.c
@@ -82,16 +82,17 @@ static void aor_deleted_observer(const void *object)
 {
        const struct ast_sip_aor *aor = object;
        const char *aor_id = ast_sorcery_object_get_id(object);
-       /* Give enough space for ^ at the beginning and ;@ at the end, since that is our object naming scheme */
-       char regex[strlen(aor_id) + 4];
+       /* Give enough space for ;@ at the end, since that is our object naming scheme */
+       size_t prefix_len = strlen(aor_id) + sizeof(";@") - 1;
+       char prefix[prefix_len + 1];
        struct ao2_container *contacts;
 
        if (aor->permanent_contacts) {
                ao2_callback(aor->permanent_contacts, OBJ_NODATA | OBJ_MULTIPLE | OBJ_UNLINK, destroy_contact, NULL);
        }
 
-       snprintf(regex, sizeof(regex), "^%s;@", aor_id);
-       if (!(contacts = ast_sorcery_retrieve_by_regex(ast_sip_get_sorcery(), "contact", regex))) {
+       sprintf(prefix, "%s;@", aor_id); /* Safe */
+       if (!(contacts = ast_sorcery_retrieve_by_prefix(ast_sip_get_sorcery(), "contact", prefix, prefix_len))) {
                return;
        }
        /* Destroy any contacts that may still exist that were made for this AoR */
@@ -223,13 +224,13 @@ struct ao2_container *ast_sip_location_retrieve_aor_contacts_nolock(const struct
 struct ao2_container *ast_sip_location_retrieve_aor_contacts_nolock_filtered(const struct ast_sip_aor *aor,
        unsigned int flags)
 {
-       /* Give enough space for ^ at the beginning and ;@ at the end, since that is our object naming scheme */
-       char regex[strlen(ast_sorcery_object_get_id(aor)) + 4];
+       /* Give enough space for ;@ at the end, since that is our object naming scheme */
+       size_t prefix_len = strlen(ast_sorcery_object_get_id(aor)) + sizeof(";@") - 1;
+       char prefix[prefix_len + 1];
        struct ao2_container *contacts;
 
-       snprintf(regex, sizeof(regex), "^%s;@", ast_sorcery_object_get_id(aor));
-
-       if (!(contacts = ast_sorcery_retrieve_by_regex(ast_sip_get_sorcery(), "contact", regex))) {
+       sprintf(prefix, "%s;@", ast_sorcery_object_get_id(aor)); /* Safe */
+       if (!(contacts = ast_sorcery_retrieve_by_prefix(ast_sip_get_sorcery(), "contact", prefix, prefix_len))) {
                return NULL;
        }