+ if (hook) {
+ pthread_rwlock_wrlock(&rwlock);
+ if (--hook->refcount)
+ hook = NULL;
+ else {
+ /* unlink */
+ prv = &list_of_xreq_hooks;
+ while (*prv && *prv != hook)
+ prv = &(*prv)->next;
+ if(*prv)
+ *prv = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ if (hook) {
+ /* free */
+ free(hook->api);
+ free(hook->verb);
+ if (hook->session)
+ afb_session_unref(hook->session);
+ free(hook);
+ }
+ }
+}
+
+/******************************************************************************
+ * section: default callbacks for tracing daemon interface
+ *****************************************************************************/
+
+static void _hook_api_(const struct afb_export *export, const char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ _hook_("api-%s", format, ap, afb_export_apiname(export));
+ va_end(ap);
+}
+
+static void hook_api_event_broadcast_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object)
+{
+ _hook_api_(export, "event_broadcast.before(%s, %s)....", name, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_event_broadcast_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object, int result)
+{
+ _hook_api_(export, "event_broadcast.after(%s, %s) -> %d", name, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE), result);
+}
+
+static void hook_api_get_event_loop_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_event *result)
+{
+ _hook_api_(export, "get_event_loop() -> %p", result);
+}
+
+static void hook_api_get_user_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
+{
+ _hook_api_(export, "get_user_bus() -> %p", result);
+}
+
+static void hook_api_get_system_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
+{
+ _hook_api_(export, "get_system_bus() -> %p", result);
+}
+
+static void hook_api_vverbose_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
+{
+ int len;
+ char *msg;
+ va_list ap;
+
+ va_copy(ap, args);
+ len = vasprintf(&msg, fmt, ap);
+ va_end(ap);
+
+ if (len < 0)
+ _hook_api_(export, "vverbose(%d:%s, %s, %d, %s) -> %s ? ? ?", level, verbose_name_of_level(level), file, line, function, fmt);
+ else {
+ _hook_api_(export, "vverbose(%d:%s, %s, %d, %s) -> %s", level, verbose_name_of_level(level), file, line, function, msg);
+ free(msg);
+ }
+}
+
+static void hook_api_event_make_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct afb_event_x2 *result)
+{
+ _hook_api_(export, "event_make(%s) -> %s:%d", name, afb_evt_event_x2_fullname(result), afb_evt_event_x2_id(result));
+}
+
+static void hook_api_rootdir_get_fd_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
+{
+ char path[PATH_MAX], proc[100];
+ ssize_t s;
+
+ if (result < 0)
+ _hook_api_(export, "rootdir_get_fd() -> %d, %m", result);
+ else {
+ snprintf(proc, sizeof proc, "/proc/self/fd/%d", result);
+ s = readlink(proc, path, sizeof path);
+ path[s < 0 ? 0 : s >= sizeof path ? sizeof path - 1 : s] = 0;
+ _hook_api_(export, "rootdir_get_fd() -> %d = %s", result, path);
+ }
+}
+
+static void hook_api_rootdir_open_locale_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
+{
+ char path[PATH_MAX], proc[100];
+ ssize_t s;
+
+ if (!locale)
+ locale = "(null)";
+ if (result < 0)
+ _hook_api_(export, "rootdir_open_locale(%s, %d, %s) -> %d, %m", filename, flags, locale, result);
+ else {
+ snprintf(proc, sizeof proc, "/proc/self/fd/%d", result);
+ s = readlink(proc, path, sizeof path);
+ path[s < 0 ? 0 : s >= sizeof path ? sizeof path - 1 : s] = 0;
+ _hook_api_(export, "rootdir_open_locale(%s, %d, %s) -> %d = %s", filename, flags, locale, result, path);
+ }
+}
+
+static void hook_api_queue_job_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
+{
+ _hook_api_(export, "queue_job(%p, %p, %p, %d) -> %d", callback, argument, group, timeout, result);
+}
+
+static void hook_api_unstore_req_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct afb_stored_req *sreq)
+{
+ _hook_api_(export, "unstore_req(%p)", sreq);
+}
+
+static void hook_api_require_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized)
+{
+ _hook_api_(export, "require_api(%s, %d)...", name, initialized);
+}
+
+static void hook_api_require_api_result_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized, int result)
+{
+ _hook_api_(export, "...require_api(%s, %d) -> %d", name, initialized, result);
+}
+
+static void hook_api_add_alias_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *alias, int result)
+{
+ _hook_api_(export, "add_alias(%s -> %s) -> %d", api, alias?:"<null>", result);
+}
+
+static void hook_api_start_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export)
+{
+ _hook_api_(export, "start.before");
+}
+
+static void hook_api_start_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status)
+{
+ _hook_api_(export, "start.after -> %d", status);
+}
+
+static void hook_api_on_event_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int event_x2, struct json_object *object)
+{
+ _hook_api_(export, "on_event.before(%s, %d, %s)", event, event_x2, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_on_event_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int event_x2, struct json_object *object)
+{
+ _hook_api_(export, "on_event.after(%s, %d, %s)", event, event_x2, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_call_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
+{
+ _hook_api_(export, "call(%s/%s, %s) ...", api, verb, json_object_to_json_string_ext(args, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_call_result_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct json_object *object, const char *error, const char *info)
+{
+ _hook_api_(export, " ...call... [%s] -> %s (%s)", error?:"success", json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE), info?:"");
+}
+
+static void hook_api_callsync_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
+{
+ _hook_api_(export, "callsync(%s/%s, %s) ...", api, verb, json_object_to_json_string_ext(args, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_callsync_result_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status, struct json_object *object, const char *error, const char *info)
+{
+ _hook_api_(export, " ...callsync... %d [%s] -> %s (%s)", status, error?:"success", json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE), info?:"");
+}
+
+static void hook_api_new_api_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *info, int noconcurrency)
+{
+ _hook_api_(export, "new_api.before %s (%s)%s ...", api, info?:"", noconcurrency?" no-concurrency" : "");
+}
+
+static void hook_api_new_api_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *api)
+{
+ _hook_api_(export, "... new_api.after %s -> %s (%d)", api, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_set_verbs_v2_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const struct afb_verb_v2 *verbs)
+{
+ _hook_api_(export, "set_verbs_v2 -> %s (%d)", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_set_verbs_v3_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const struct afb_verb_v3 *verbs)
+{
+ _hook_api_(export, "set_verbs_v3 -> %s (%d)", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_add_verb_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *verb, const char *info, int glob)
+{
+ _hook_api_(export, "add_verb(%s%s [%s]) -> %s (%d)", verb, glob?" (GLOB)":"", info?:"", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_del_verb_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *verb)
+{
+ _hook_api_(export, "del_verb(%s) -> %s (%d)", verb, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_set_on_event_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
+{
+ _hook_api_(export, "set_on_event -> %s (%d)", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_set_on_init_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
+{
+ _hook_api_(export, "set_on_init -> %s (%d)", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_api_seal_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export)
+{
+ _hook_api_(export, "seal");
+}
+
+static void hook_api_event_handler_add_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *pattern)
+{
+ _hook_api_(export, "event_handler_add(%s) -> %s (%d)", pattern, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_event_handler_del_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *pattern)
+{
+ _hook_api_(export, "event_handler_del(%s) -> %s (%d)", pattern, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_class_provide_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *name)
+{
+ _hook_api_(export, "class_provide(%s) -> %s (%d)", name, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_class_require_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result, const char *name)
+{
+ _hook_api_(export, "class_require(%s) -> %s (%d)", name, result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_delete_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
+{
+ _hook_api_(export, "delete_api -> %s (%d)", result >= 0 ? "OK" : "ERROR", result);
+}
+
+static void hook_api_on_event_handler_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int event_x2, struct json_object *object, const char *pattern)
+{
+ _hook_api_(export, "on_event_handler[%s].before(%s, %d, %s)", pattern, event, event_x2, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_on_event_handler_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int event_x2, struct json_object *object, const char *pattern)
+{
+ _hook_api_(export, "on_event_handler[%s].after(%s, %d, %s)", pattern, event, event_x2, json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_api_settings_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct json_object *object)
+{
+ _hook_api_(export, "settings -> %s", json_object_to_json_string_ext(object, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static struct afb_hook_api_itf hook_api_default_itf = {
+ .hook_api_event_broadcast_before = hook_api_event_broadcast_before_cb,
+ .hook_api_event_broadcast_after = hook_api_event_broadcast_after_cb,
+ .hook_api_get_event_loop = hook_api_get_event_loop_cb,
+ .hook_api_get_user_bus = hook_api_get_user_bus_cb,
+ .hook_api_get_system_bus = hook_api_get_system_bus_cb,
+ .hook_api_vverbose = hook_api_vverbose_cb,
+ .hook_api_event_make = hook_api_event_make_cb,
+ .hook_api_rootdir_get_fd = hook_api_rootdir_get_fd_cb,
+ .hook_api_rootdir_open_locale = hook_api_rootdir_open_locale_cb,
+ .hook_api_queue_job = hook_api_queue_job_cb,
+ .hook_api_legacy_unstore_req = hook_api_unstore_req_cb,
+ .hook_api_require_api = hook_api_require_api_cb,
+ .hook_api_require_api_result = hook_api_require_api_result_cb,
+ .hook_api_add_alias = hook_api_add_alias_cb,
+ .hook_api_start_before = hook_api_start_before_cb,
+ .hook_api_start_after = hook_api_start_after_cb,
+ .hook_api_on_event_before = hook_api_on_event_before_cb,
+ .hook_api_on_event_after = hook_api_on_event_after_cb,
+ .hook_api_call = hook_api_call_cb,
+ .hook_api_call_result = hook_api_call_result_cb,
+ .hook_api_callsync = hook_api_callsync_cb,
+ .hook_api_callsync_result = hook_api_callsync_result_cb,
+ .hook_api_new_api_before = hook_api_new_api_before_cb,
+ .hook_api_new_api_after = hook_api_new_api_after_cb,
+ .hook_api_api_set_verbs_v2 = hook_api_api_set_verbs_v2_cb,
+ .hook_api_api_set_verbs_v3 = hook_api_api_set_verbs_v3_cb,
+ .hook_api_api_add_verb = hook_api_api_add_verb_cb,
+ .hook_api_api_del_verb = hook_api_api_del_verb_cb,
+ .hook_api_api_set_on_event = hook_api_api_set_on_event_cb,
+ .hook_api_api_set_on_init = hook_api_api_set_on_init_cb,
+ .hook_api_api_seal = hook_api_api_seal_cb,
+ .hook_api_event_handler_add = hook_api_event_handler_add_cb,
+ .hook_api_event_handler_del = hook_api_event_handler_del_cb,
+ .hook_api_class_provide = hook_api_class_provide_cb,
+ .hook_api_class_require = hook_api_class_require_cb,
+ .hook_api_delete_api = hook_api_delete_api_cb,
+ .hook_api_on_event_handler_before = hook_api_on_event_handler_before_cb,
+ .hook_api_on_event_handler_after = hook_api_on_event_handler_after_cb,
+ .hook_api_settings = hook_api_settings_cb,
+};
+
+/******************************************************************************
+ * section: hooks for tracing daemon interface (export)
+ *****************************************************************************/
+
+#define _HOOK_API_2_(flag,func,...) \
+ struct afb_hook_api *hook; \
+ struct afb_hookid hookid; \
+ const char *apiname = afb_export_apiname(export); \
+ pthread_rwlock_rdlock(&rwlock); \
+ init_hookid(&hookid); \
+ hook = list_of_api_hooks; \
+ while (hook) { \
+ if (hook->itf->hook_api_##func \
+ && (hook->flags & afb_hook_flag_api_##flag) != 0 \
+ && MATCH_API(hook->api, apiname)) { \
+ hook->itf->hook_api_##func(hook->closure, &hookid, __VA_ARGS__); \
+ } \
+ hook = hook->next; \
+ } \
+ pthread_rwlock_unlock(&rwlock);
+
+#define _HOOK_API_(what,...) _HOOK_API_2_(what,what,__VA_ARGS__)
+
+void afb_hook_api_event_broadcast_before(const struct afb_export *export, const char *name, struct json_object *object)
+{
+ _HOOK_API_2_(event_broadcast, event_broadcast_before, export, name, object);
+}
+
+int afb_hook_api_event_broadcast_after(const struct afb_export *export, const char *name, struct json_object *object, int result)
+{
+ _HOOK_API_2_(event_broadcast, event_broadcast_after, export, name, object, result);
+ return result;
+}
+
+struct sd_event *afb_hook_api_get_event_loop(const struct afb_export *export, struct sd_event *result)
+{
+ _HOOK_API_(get_event_loop, export, result);
+ return result;
+}
+
+struct sd_bus *afb_hook_api_get_user_bus(const struct afb_export *export, struct sd_bus *result)
+{
+ _HOOK_API_(get_user_bus, export, result);
+ return result;
+}
+
+struct sd_bus *afb_hook_api_get_system_bus(const struct afb_export *export, struct sd_bus *result)
+{
+ _HOOK_API_(get_system_bus, export, result);
+ return result;
+}
+
+void afb_hook_api_vverbose(const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
+{
+ _HOOK_API_(vverbose, export, level, file, line, function, fmt, args);
+}
+
+struct afb_event_x2 *afb_hook_api_event_make(const struct afb_export *export, const char *name, struct afb_event_x2 *result)
+{
+ _HOOK_API_(event_make, export, name, result);
+ return result;
+}
+
+int afb_hook_api_rootdir_get_fd(const struct afb_export *export, int result)
+{
+ _HOOK_API_(rootdir_get_fd, export, result);
+ return result;
+}
+
+int afb_hook_api_rootdir_open_locale(const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
+{
+ _HOOK_API_(rootdir_open_locale, export, filename, flags, locale, result);
+ return result;
+}
+
+int afb_hook_api_queue_job(const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
+{
+ _HOOK_API_(queue_job, export, callback, argument, group, timeout, result);
+ return result;
+}
+
+void afb_hook_api_legacy_unstore_req(const struct afb_export *export, struct afb_stored_req *sreq)
+{
+ _HOOK_API_(legacy_unstore_req, export, sreq);
+}
+
+void afb_hook_api_require_api(const struct afb_export *export, const char *name, int initialized)
+{
+ _HOOK_API_(require_api, export, name, initialized);
+}
+
+int afb_hook_api_require_api_result(const struct afb_export *export, const char *name, int initialized, int result)
+{
+ _HOOK_API_2_(require_api, require_api_result, export, name, initialized, result);
+ return result;
+}
+
+int afb_hook_api_add_alias(const struct afb_export *export, const char *api, const char *alias, int result)
+{
+ _HOOK_API_(add_alias, export, api, alias, result);
+ return result;
+}
+
+void afb_hook_api_start_before(const struct afb_export *export)
+{
+ _HOOK_API_2_(start, start_before, export);
+}
+
+int afb_hook_api_start_after(const struct afb_export *export, int status)
+{
+ _HOOK_API_2_(start, start_after, export, status);
+ return status;
+}
+
+void afb_hook_api_on_event_before(const struct afb_export *export, const char *event, int event_x2, struct json_object *object)
+{
+ _HOOK_API_2_(on_event, on_event_before, export, event, event_x2, object);
+}
+
+void afb_hook_api_on_event_after(const struct afb_export *export, const char *event, int event_x2, struct json_object *object)
+{
+ _HOOK_API_2_(on_event, on_event_after, export, event, event_x2, object);
+}
+
+void afb_hook_api_call(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
+{
+ _HOOK_API_(call, export, api, verb, args);
+}
+
+void afb_hook_api_call_result(const struct afb_export *export, struct json_object *object, const char*error, const char *info)
+{
+ _HOOK_API_2_(call, call_result, export, object, error, info);
+
+}
+
+void afb_hook_api_callsync(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
+{
+ _HOOK_API_(callsync, export, api, verb, args);
+}
+
+int afb_hook_api_callsync_result(const struct afb_export *export, int status, struct json_object *object, const char *error, const char *info)
+{
+ _HOOK_API_2_(callsync, callsync_result, export, status, object, error, info);
+ return status;
+}
+
+void afb_hook_api_new_api_before(const struct afb_export *export, const char *api, const char *info, int noconcurrency)
+{
+ _HOOK_API_2_(new_api, new_api_before, export, api, info, noconcurrency);
+}
+
+int afb_hook_api_new_api_after(const struct afb_export *export, int result, const char *api)
+{
+ _HOOK_API_2_(new_api, new_api_after, export, result, api);
+ return result;
+}
+
+int afb_hook_api_api_set_verbs_v2(const struct afb_export *export, int result, const struct afb_verb_v2 *verbs)
+{
+ _HOOK_API_2_(api_set_verbs, api_set_verbs_v2, export, result, verbs);
+ return result;
+}
+
+int afb_hook_api_api_set_verbs_v3(const struct afb_export *export, int result, const struct afb_verb_v3 *verbs)
+{
+ _HOOK_API_2_(api_set_verbs, api_set_verbs_v3, export, result, verbs);
+ return result;
+}
+
+int afb_hook_api_api_add_verb(const struct afb_export *export, int result, const char *verb, const char *info, int glob)
+{
+ _HOOK_API_(api_add_verb, export, result, verb, info, glob);
+ return result;
+}
+
+int afb_hook_api_api_del_verb(const struct afb_export *export, int result, const char *verb)
+{
+ _HOOK_API_(api_del_verb, export, result, verb);
+ return result;
+}
+
+int afb_hook_api_api_set_on_event(const struct afb_export *export, int result)
+{
+ _HOOK_API_(api_set_on_event, export, result);
+ return result;
+}
+
+int afb_hook_api_api_set_on_init(const struct afb_export *export, int result)
+{
+ _HOOK_API_(api_set_on_init, export, result);
+ return result;
+}
+
+void afb_hook_api_api_seal(const struct afb_export *export)
+{
+ _HOOK_API_(api_seal, export);
+}
+
+int afb_hook_api_event_handler_add(const struct afb_export *export, int result, const char *pattern)
+{
+ _HOOK_API_(event_handler_add, export, result, pattern);
+ return result;
+}
+int afb_hook_api_event_handler_del(const struct afb_export *export, int result, const char *pattern)
+{
+ _HOOK_API_(event_handler_del, export, result, pattern);
+ return result;
+}
+int afb_hook_api_class_provide(const struct afb_export *export, int result, const char *name)
+{
+ _HOOK_API_(class_provide, export, result, name);
+ return result;
+}
+int afb_hook_api_class_require(const struct afb_export *export, int result, const char *name)
+{
+ _HOOK_API_(class_require, export, result, name);
+ return result;
+}
+
+int afb_hook_api_delete_api(const struct afb_export *export, int result)
+{
+ _HOOK_API_(delete_api, export, result);
+ return result;
+}
+
+void afb_hook_api_on_event_handler_before(const struct afb_export *export, const char *event, int event_x2, struct json_object *object, const char *pattern)
+{
+ _HOOK_API_2_(on_event_handler, on_event_handler_before, export, event, event_x2, object, pattern);
+}
+
+void afb_hook_api_on_event_handler_after(const struct afb_export *export, const char *event, int event_x2, struct json_object *object, const char *pattern)
+{
+ _HOOK_API_2_(on_event_handler, on_event_handler_after, export, event, event_x2, object, pattern);
+}
+
+struct json_object *afb_hook_api_settings(const struct afb_export *export, struct json_object *object)
+{
+ _HOOK_API_(settings, export, object);
+ return object;
+}
+
+/******************************************************************************
+ * section: hooking export
+ *****************************************************************************/
+
+int afb_hook_flags_api(const char *api)
+{
+ int flags;
+ struct afb_hook_api *hook;
+
+ flags = 0;
+ pthread_rwlock_rdlock(&rwlock);
+ hook = list_of_api_hooks;
+ while (hook) {
+ if (!api || MATCH_API(hook->api, api))
+ flags |= hook->flags;
+ hook = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ return flags;
+}
+
+struct afb_hook_api *afb_hook_create_api(const char *api, int flags, struct afb_hook_api_itf *itf, void *closure)
+{
+ struct afb_hook_api *hook;
+
+ /* alloc the result */
+ hook = calloc(1, sizeof *hook);
+ if (hook == NULL)
+ return NULL;
+
+ /* get a copy of the names */
+ hook->api = api ? strdup(api) : NULL;
+ if (api && !hook->api) {
+ free(hook);
+ return NULL;
+ }
+
+ /* initialise the rest */
+ hook->refcount = 1;
+ hook->flags = flags;
+ hook->itf = itf ? itf : &hook_api_default_itf;
+ hook->closure = closure;
+
+ /* record the hook */
+ pthread_rwlock_wrlock(&rwlock);
+ hook->next = list_of_api_hooks;
+ list_of_api_hooks = hook;
+ pthread_rwlock_unlock(&rwlock);
+
+ /* returns it */
+ return hook;
+}
+
+struct afb_hook_api *afb_hook_addref_api(struct afb_hook_api *hook)
+{
+ pthread_rwlock_wrlock(&rwlock);
+ hook->refcount++;
+ pthread_rwlock_unlock(&rwlock);
+ return hook;
+}
+
+void afb_hook_unref_api(struct afb_hook_api *hook)
+{
+ struct afb_hook_api **prv;
+
+ if (hook) {
+ pthread_rwlock_wrlock(&rwlock);
+ if (--hook->refcount)
+ hook = NULL;
+ else {
+ /* unlink */
+ prv = &list_of_api_hooks;
+ while (*prv && *prv != hook)
+ prv = &(*prv)->next;
+ if(*prv)
+ *prv = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ if (hook) {
+ /* free */
+ free(hook->api);
+ free(hook);
+ }
+ }
+}
+
+/******************************************************************************
+ * section: default callbacks for tracing service interface (evt)
+ *****************************************************************************/
+
+static void _hook_evt_(const char *evt, int id, const char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ _hook_("evt-%s:%d", format, ap, evt, id);
+ va_end(ap);
+}
+
+static void hook_evt_create_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
+{
+ _hook_evt_(evt, id, "create");
+}
+
+static void hook_evt_push_before_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
+{
+ _hook_evt_(evt, id, "push.before(%s)", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+
+static void hook_evt_push_after_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
+{
+ _hook_evt_(evt, id, "push.after(%s) -> %d", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_NOSLASHESCAPE), result);
+}
+
+static void hook_evt_broadcast_before_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
+{
+ _hook_evt_(evt, id, "broadcast.before(%s)", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_NOSLASHESCAPE));
+}
+
+static void hook_evt_broadcast_after_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
+{
+ _hook_evt_(evt, id, "broadcast.after(%s) -> %d", json_object_to_json_string_ext(obj, JSON_C_TO_STRING_NOSLASHESCAPE), result);
+}
+
+static void hook_evt_name_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, const char *result)
+{
+ _hook_evt_(evt, id, "name -> %s", result);
+}
+
+static void hook_evt_addref_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
+{
+ _hook_evt_(evt, id, "addref");
+}
+
+static void hook_evt_unref_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
+{
+ _hook_evt_(evt, id, "unref");
+}
+
+static struct afb_hook_evt_itf hook_evt_default_itf = {
+ .hook_evt_create = hook_evt_create_cb,
+ .hook_evt_push_before = hook_evt_push_before_cb,
+ .hook_evt_push_after = hook_evt_push_after_cb,
+ .hook_evt_broadcast_before = hook_evt_broadcast_before_cb,
+ .hook_evt_broadcast_after = hook_evt_broadcast_after_cb,
+ .hook_evt_name = hook_evt_name_cb,
+ .hook_evt_addref = hook_evt_addref_cb,
+ .hook_evt_unref = hook_evt_unref_cb
+};
+
+/******************************************************************************
+ * section: hooks for tracing events interface (evt)
+ *****************************************************************************/
+
+#define _HOOK_EVT_(what,...) \
+ struct afb_hook_evt *hook; \
+ struct afb_hookid hookid; \
+ pthread_rwlock_rdlock(&rwlock); \
+ init_hookid(&hookid); \
+ hook = list_of_evt_hooks; \
+ while (hook) { \
+ if (hook->itf->hook_evt_##what \
+ && (hook->flags & afb_hook_flag_evt_##what) != 0 \
+ && MATCH_EVENT(hook->pattern, evt)) { \
+ hook->itf->hook_evt_##what(hook->closure, &hookid, __VA_ARGS__); \
+ } \
+ hook = hook->next; \
+ } \
+ pthread_rwlock_unlock(&rwlock);
+
+void afb_hook_evt_create(const char *evt, int id)
+{
+ _HOOK_EVT_(create, evt, id);
+}
+
+void afb_hook_evt_push_before(const char *evt, int id, struct json_object *obj)
+{
+ _HOOK_EVT_(push_before, evt, id, obj);
+}
+
+int afb_hook_evt_push_after(const char *evt, int id, struct json_object *obj, int result)
+{
+ _HOOK_EVT_(push_after, evt, id, obj, result);
+ return result;
+}
+
+void afb_hook_evt_broadcast_before(const char *evt, int id, struct json_object *obj)
+{
+ _HOOK_EVT_(broadcast_before, evt, id, obj);
+}
+
+int afb_hook_evt_broadcast_after(const char *evt, int id, struct json_object *obj, int result)
+{
+ _HOOK_EVT_(broadcast_after, evt, id, obj, result);
+ return result;
+}
+
+void afb_hook_evt_name(const char *evt, int id, const char *result)
+{
+ _HOOK_EVT_(name, evt, id, result);
+}
+
+void afb_hook_evt_addref(const char *evt, int id)
+{
+ _HOOK_EVT_(addref, evt, id);
+}
+
+void afb_hook_evt_unref(const char *evt, int id)
+{
+ _HOOK_EVT_(unref, evt, id);
+}
+
+/******************************************************************************
+ * section: hooking services (evt)
+ *****************************************************************************/
+
+int afb_hook_flags_evt(const char *name)
+{
+ int flags;
+ struct afb_hook_evt *hook;
+
+ flags = 0;
+ pthread_rwlock_rdlock(&rwlock);
+ hook = list_of_evt_hooks;
+ while (hook) {
+ if (!name || MATCH_EVENT(hook->pattern, name))
+ flags |= hook->flags;
+ hook = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ return flags;
+}
+
+struct afb_hook_evt *afb_hook_create_evt(const char *pattern, int flags, struct afb_hook_evt_itf *itf, void *closure)
+{
+ struct afb_hook_evt *hook;
+
+ /* alloc the result */
+ hook = calloc(1, sizeof *hook);
+ if (hook == NULL)
+ return NULL;
+
+ /* get a copy of the names */
+ hook->pattern = pattern ? strdup(pattern) : NULL;
+ if (pattern && !hook->pattern) {
+ free(hook);
+ return NULL;
+ }
+
+ /* initialise the rest */
+ hook->refcount = 1;
+ hook->flags = flags;
+ hook->itf = itf ? itf : &hook_evt_default_itf;
+ hook->closure = closure;
+
+ /* record the hook */
+ pthread_rwlock_wrlock(&rwlock);
+ hook->next = list_of_evt_hooks;
+ list_of_evt_hooks = hook;
+ pthread_rwlock_unlock(&rwlock);
+
+ /* returns it */
+ return hook;
+}
+
+struct afb_hook_evt *afb_hook_addref_evt(struct afb_hook_evt *hook)
+{
+ pthread_rwlock_wrlock(&rwlock);
+ hook->refcount++;
+ pthread_rwlock_unlock(&rwlock);
+ return hook;
+}
+
+void afb_hook_unref_evt(struct afb_hook_evt *hook)
+{
+ struct afb_hook_evt **prv;
+
+ if (hook) {
+ pthread_rwlock_wrlock(&rwlock);
+ if (--hook->refcount)
+ hook = NULL;
+ else {
+ /* unlink */
+ prv = &list_of_evt_hooks;
+ while (*prv && *prv != hook)
+ prv = &(*prv)->next;
+ if(*prv)
+ *prv = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ if (hook) {
+ /* free */
+ free(hook->pattern);
+ free(hook);
+ }
+ }
+}
+
+/******************************************************************************
+ * section: default callbacks for sessions (session)
+ *****************************************************************************/
+
+static void _hook_session_(struct afb_session *session, const char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ _hook_("session-%s", format, ap, afb_session_uuid(session));
+ va_end(ap);
+}
+
+static void hook_session_create_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "create -> token=%s", afb_session_token(session));
+}
+
+static void hook_session_close_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "close");
+}
+
+static void hook_session_destroy_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "destroy");
+}
+
+static void hook_session_renew_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "renew -> token=%s", afb_session_token(session));
+}
+
+static void hook_session_addref_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "addref");
+}
+
+static void hook_session_unref_cb(void *closure, const struct afb_hookid *hookid, struct afb_session *session)
+{
+ _hook_session_(session, "unref");
+}
+
+static struct afb_hook_session_itf hook_session_default_itf = {
+ .hook_session_create = hook_session_create_cb,
+ .hook_session_close = hook_session_close_cb,
+ .hook_session_destroy = hook_session_destroy_cb,
+ .hook_session_renew = hook_session_renew_cb,
+ .hook_session_addref = hook_session_addref_cb,
+ .hook_session_unref = hook_session_unref_cb
+};
+
+/******************************************************************************
+ * section: hooks for tracing sessions (session)
+ *****************************************************************************/
+
+#define _HOOK_SESSION_(what,...) \
+ struct afb_hook_session *hook; \
+ struct afb_hookid hookid; \
+ const char *sessid = 0; \
+ pthread_rwlock_rdlock(&rwlock); \
+ init_hookid(&hookid); \
+ hook = list_of_session_hooks; \
+ while (hook) { \
+ if (hook->itf->hook_session_##what \
+ && (hook->flags & afb_hook_flag_session_##what) != 0 \
+ && MATCH_SESSION(hook->pattern, (sessid?:(sessid=afb_session_uuid(session))))) { \
+ hook->itf->hook_session_##what(hook->closure, &hookid, __VA_ARGS__); \
+ } \
+ hook = hook->next; \
+ } \
+ pthread_rwlock_unlock(&rwlock);
+
+void afb_hook_session_create(struct afb_session *session)
+{
+ _HOOK_SESSION_(create, session);
+}
+
+void afb_hook_session_close(struct afb_session *session)
+{
+ _HOOK_SESSION_(close, session);
+}
+
+void afb_hook_session_destroy(struct afb_session *session)
+{
+ _HOOK_SESSION_(destroy, session);
+}
+
+void afb_hook_session_renew(struct afb_session *session)
+{
+ _HOOK_SESSION_(renew, session);
+}
+
+void afb_hook_session_addref(struct afb_session *session)
+{
+ _HOOK_SESSION_(addref, session);
+}
+
+void afb_hook_session_unref(struct afb_session *session)
+{
+ _HOOK_SESSION_(unref, session);
+}
+
+
+/******************************************************************************
+ * section: hooking sessions (session)
+ *****************************************************************************/
+
+struct afb_hook_session *afb_hook_create_session(const char *pattern, int flags, struct afb_hook_session_itf *itf, void *closure)
+{
+ struct afb_hook_session *hook;
+
+ /* alloc the result */
+ hook = calloc(1, sizeof *hook);
+ if (hook == NULL)
+ return NULL;
+
+ /* get a copy of the names */
+ hook->pattern = pattern ? strdup(pattern) : NULL;
+ if (pattern && !hook->pattern) {
+ free(hook);
+ return NULL;
+ }
+
+ /* initialise the rest */
+ hook->refcount = 1;
+ hook->flags = flags;
+ hook->itf = itf ? itf : &hook_session_default_itf;
+ hook->closure = closure;
+
+ /* record the hook */
+ pthread_rwlock_wrlock(&rwlock);
+ hook->next = list_of_session_hooks;
+ list_of_session_hooks = hook;
+ pthread_rwlock_unlock(&rwlock);
+
+ /* returns it */
+ return hook;
+}
+
+struct afb_hook_session *afb_hook_addref_session(struct afb_hook_session *hook)
+{
+ pthread_rwlock_wrlock(&rwlock);
+ hook->refcount++;
+ pthread_rwlock_unlock(&rwlock);
+ return hook;
+}
+
+void afb_hook_unref_session(struct afb_hook_session *hook)
+{
+ struct afb_hook_session **prv;
+
+ if (hook) {
+ pthread_rwlock_wrlock(&rwlock);
+ if (--hook->refcount)
+ hook = NULL;
+ else {
+ /* unlink */
+ prv = &list_of_session_hooks;
+ while (*prv && *prv != hook)
+ prv = &(*prv)->next;
+ if(*prv)
+ *prv = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ if (hook) {
+ /* free */
+ free(hook->pattern);
+ free(hook);
+ }
+ }
+}
+
+/******************************************************************************
+ * section: default callbacks for globals (global)
+ *****************************************************************************/
+
+static void _hook_global_(const char *format, ...)
+{
+ va_list ap;
+ va_start(ap, format);
+ _hook_("global", format, ap);
+ va_end(ap);
+}
+
+static void hook_global_vverbose_cb(void *closure, const struct afb_hookid *hookid, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
+{
+ int len;
+ char *msg;
+ va_list ap;
+
+ va_copy(ap, args);
+ len = vasprintf(&msg, fmt, ap);
+ va_end(ap);
+
+ if (len < 0)
+ _hook_global_("vverbose(%d:%s, %s, %d, %s) -> %s ? ? ?", level, verbose_name_of_level(level), file, line, func, fmt);
+ else {
+ _hook_global_("vverbose(%d:%s, %s, %d, %s) -> %s", level, verbose_name_of_level(level), file, line, func, msg);
+ free(msg);
+ }
+}
+
+static struct afb_hook_global_itf hook_global_default_itf = {
+ .hook_global_vverbose = hook_global_vverbose_cb
+};
+
+/******************************************************************************
+ * section: hooks for tracing globals (global)
+ *****************************************************************************/
+
+#define _HOOK_GLOBAL_(what,...) \
+ struct afb_hook_global *hook; \
+ struct afb_hookid hookid; \
+ pthread_rwlock_rdlock(&rwlock); \
+ init_hookid(&hookid); \
+ hook = list_of_global_hooks; \
+ while (hook) { \
+ if (hook->itf->hook_global_##what \
+ && (hook->flags & afb_hook_flag_global_##what) != 0) { \
+ hook->itf->hook_global_##what(hook->closure, &hookid, __VA_ARGS__); \
+ } \
+ hook = hook->next; \
+ } \
+ pthread_rwlock_unlock(&rwlock);
+
+static void afb_hook_global_vverbose(int level, const char *file, int line, const char *func, const char *fmt, va_list args)
+{
+ _HOOK_GLOBAL_(vverbose, level, file ?: "?", line, func ?: "?", fmt ?: "", args);
+}
+
+/******************************************************************************
+ * section: hooking globals (global)
+ *****************************************************************************/
+
+static void update_global()
+{
+ struct afb_hook_global *hook;
+ int flags = 0;
+
+ pthread_rwlock_rdlock(&rwlock);
+ hook = list_of_global_hooks;
+ while (hook) {
+ flags = hook->flags;
+ hook = hook->next;
+ }
+ verbose_observer = (flags & afb_hook_flag_global_vverbose) ? afb_hook_global_vverbose : NULL;
+ pthread_rwlock_unlock(&rwlock);
+}
+
+struct afb_hook_global *afb_hook_create_global(int flags, struct afb_hook_global_itf *itf, void *closure)
+{
+ struct afb_hook_global *hook;
+
+ /* alloc the result */
+ hook = calloc(1, sizeof *hook);
+ if (hook == NULL)
+ return NULL;
+
+ /* initialise the rest */
+ hook->refcount = 1;
+ hook->flags = flags;
+ hook->itf = itf ? itf : &hook_global_default_itf;
+ hook->closure = closure;
+
+ /* record the hook */
+ pthread_rwlock_wrlock(&rwlock);
+ hook->next = list_of_global_hooks;
+ list_of_global_hooks = hook;
+ pthread_rwlock_unlock(&rwlock);
+
+ /* update hooking */
+ update_global();
+
+ /* returns it */
+ return hook;
+}
+
+struct afb_hook_global *afb_hook_addref_global(struct afb_hook_global *hook)
+{
+ pthread_rwlock_wrlock(&rwlock);
+ hook->refcount++;
+ pthread_rwlock_unlock(&rwlock);
+ return hook;
+}
+
+void afb_hook_unref_global(struct afb_hook_global *hook)
+{
+ struct afb_hook_global **prv;
+
+ if (hook) {
+ pthread_rwlock_wrlock(&rwlock);
+ if (--hook->refcount)
+ hook = NULL;
+ else {
+ /* unlink */
+ prv = &list_of_global_hooks;
+ while (*prv && *prv != hook)
+ prv = &(*prv)->next;
+ if(*prv)
+ *prv = hook->next;
+ }
+ pthread_rwlock_unlock(&rwlock);
+ if (hook) {
+ /* free */
+ free(hook);
+
+ /* update hooking */
+ update_global();
+ }