add support for parsing method calls with json arguments

CMakeLists.txt

@@ -3,6 +3,11 @@ cmake_minimum_required(VERSION 2.8)
 PROJECT(ubus C)
 ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3)
 
+IF(APPLE)
+  INCLUDE_DIRECTORIES(/opt/local/include)
+  LINK_DIRECTORIES(/opt/local/lib)
+ENDIF()
+
 ADD_LIBRARY(ubus SHARED libubus.c)
 TARGET_LINK_LIBRARIES(ubus ubox)
 
@@ -11,7 +16,7 @@ TARGET_LINK_LIBRARIES(ubusd ubox)
 
 ADD_EXECUTABLE(cli cli.c)
 SET_TARGET_PROPERTIES(cli PROPERTIES OUTPUT_NAME ubus)
-TARGET_LINK_LIBRARIES(cli ubus ubox)
+TARGET_LINK_LIBRARIES(cli ubus ubox json)
 
 ADD_EXECUTABLE(listener listener.c)
 TARGET_LINK_LIBRARIES(listener ubus ubox)

cli.c

@@ -1,5 +1,85 @@
+#include <json/json.h>
 #include "libubus.h"
 
+static struct blob_buf b;
+
+
+static bool blobmsg_add_element(struct blob_buf *b, const char *name, json_object *obj);
+
+static bool blobmsg_add_object(struct blob_buf *b, json_object *obj)
+{
+	json_object_object_foreach(obj, key, val) {
+		if (!blobmsg_add_element(b, key, val))
+			return false;
+	}
+	return true;
+}
+
+static bool blobmsg_add_array(struct blob_buf *b, struct array_list *a)
+{
+	int i, len;
+
+	for (i = 0, len = array_list_length(a); i < len; i++) {
+		if (!blobmsg_add_element(b, NULL, array_list_get_idx(a, i)))
+			return false;
+	}
+
+	return true;
+}
+
+static bool blobmsg_add_element(struct blob_buf *b, const char *name, json_object *obj)
+{
+	bool ret = true;
+	void *c;
+
+	if (!obj)
+		return false;
+
+	switch (json_object_get_type(obj)) {
+	case json_type_object:
+		c = blobmsg_open_table(b, name);
+		ret = blobmsg_add_object(b, obj);
+		blobmsg_close_table(b, c);
+		break;
+	case json_type_array:
+		c = blobmsg_open_array(b, name);
+		ret = blobmsg_add_array(b, json_object_get_array(obj));
+		blobmsg_close_array(b, c);
+		break;
+	case json_type_string:
+		blobmsg_add_string(b, name, json_object_get_string(obj));
+		break;
+	case json_type_boolean:
+		blobmsg_add_u8(b, name, json_object_get_boolean(obj));
+		break;
+	case json_type_int:
+		blobmsg_add_u32(b, name, json_object_get_int(obj));
+		break;
+	default:
+		return false;
+	}
+	return ret;
+}
+
+static bool blobmsg_from_json(struct blob_buf *b, const char *str)
+{
+	json_object *obj;
+	bool ret = false;
+
+	obj = json_tokener_parse(str);
+	if (is_error(obj))
+		return false;
+
+	if (json_object_get_type(obj) != json_type_object)
+		goto out;
+
+	ret = blobmsg_add_object(b, obj);
+
+out:
+	json_object_put(obj);
+	return ret;
+}
+
 static void receive_lookup(struct ubus_context *ctx, struct ubus_object_data *obj, void *priv)
 {
 	struct blob_attr *cur;
@@ -94,7 +174,7 @@ int main(int argc, char **argv)
 {
 	static struct ubus_context *ctx;
 	char *cmd;
-	int ret;
+	int ret = 0;
 
 	ctx = ubus_connect(NULL);
 	if (!ctx) {
@@ -119,9 +199,15 @@ int main(int argc, char **argv)
 		if (argc < 4 || argc > 5)
 			return usage(argv[0]);
 
+		blob_buf_init(&b, 0);
+		if (argc == 5 && !blobmsg_from_json(&b, argv[4])) {
+			fprintf(stderr, "Failed to parse message data\n");
+			goto out;
+		}
+
 		ret = ubus_lookup_id(ctx, argv[2], &id);
 		if (!ret)
-			ret = ubus_invoke(ctx, id, argv[3], NULL, receive_data, NULL);
+			ret = ubus_invoke(ctx, id, argv[3], b.head, receive_data, NULL);
 	} else if (!strcmp(cmd, "listen")) {
 		ret = ubus_cli_listen(ctx, argc - 2, argv + 2);
 	} else {
@@ -131,6 +217,7 @@ int main(int argc, char **argv)
 	if (ret)
 		fprintf(stderr, "Failed: %s\n", ubus_strerror(ret));
 
+out:
 	ubus_free(ctx);
 	return ret;
 }