handler: add mechanism to generate external device handler stubs

Parse JSON files in a given directory and pass the information on to a callback
function for creation of an external device handler stub.
The description contains:
 - 'name': the name of the device type,
 - 'ubus_name': the name of the external device handler daemon on ubus,
 - 'bridge': a flag indicating whether the devices are bridge-like,
 - optionally 'br_prefix': a prefix for created devices
   (only for bridge-like, defaults to type name),
 - 'config': the UCI config options for devices of this type, and
 - optionally 'info' and 'stats': the format of calls to info() and dump().

Signed-off-by: Arne Kappen <arne.kappen@hhi.fraunhofer.de>

1 files changed, 5 insertions, 0 deletions

diff --git a/handler.h b/handler.h
index e3e2af5..7064409 100644
--- a/handler.h
+++ b/handler.h
@@ -19,6 +19,10 @@
 #include "config.h"
 
 typedef void (*script_dump_cb)(const char *script, const char *name, json_object *obj);
+typedef void (*create_extdev_handler_cb)(const char *cfg_file, const char *name,
+					 const char *ubus_name, bool bridge,
+					 const char *br_prefix, json_object *config_obj,
+					 json_object *info_obj, json_object *stats_obj);
 
 static inline json_object *
 json_check_type(json_object *obj, json_type type)
@@ -41,6 +45,7 @@ json_get_field(json_object *obj, const char *name, json_type type)
 
 int netifd_open_subdir(const char *name);
 void netifd_init_script_handlers(int dir_fd, script_dump_cb cb);
+void netifd_init_extdev_handlers(int dir_fd, create_extdev_handler_cb cb);
 char *netifd_handler_parse_config(struct uci_blob_param_list *config, json_object *obj);
 
 #endif