/*
* Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1
#include <unistd.h>
#include <libubus.h>
#include <libubox/blobmsg.h>
+#include <libubox/blobmsg_json.h>
#include <lauxlib.h>
#define MODNAME "ubus"
#define METANAME MODNAME ".meta"
+static lua_State *state;
struct ubus_lua_connection {
int timeout;
struct ubus_context *ctx;
};
+struct ubus_lua_object {
+ struct ubus_object o;
+ int r;
+};
static int
ubus_lua_parse_blob(lua_State *L, struct blob_attr *attr, bool table);
return 1;
}
+static int
+ubus_method_handler(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct ubus_lua_object *o = container_of(obj, struct ubus_lua_object, o);
+
+ lua_getglobal(state, "__ubus_cb");
+ lua_rawgeti(state, -1, o->r);
+ lua_getfield(state, -1, method);
+
+ if (lua_isfunction(state, -1)) {
+ lua_pushlightuserdata(state, req);
+ lua_call(state, 1, 0);
+ }
+ return 0;
+}
+
+static int lua_gettablelen(lua_State *L, int index)
+{
+ int cnt = 0;
+
+ lua_pushnil(L);
+ index -= 1;
+ while (lua_next(L, index) != 0) {
+ cnt++;
+ lua_pop(L, 1);
+ }
+
+ return cnt;
+}
+
+static int ubus_lua_reply(lua_State *L)
+{
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+ struct ubus_request_data *req;
+
+ luaL_checktype(L, 3, LUA_TTABLE);
+ blob_buf_init(&c->buf, 0);
+
+ if (!ubus_lua_format_blob_array(L, &c->buf, true))
+ {
+ lua_pushnil(L);
+ lua_pushinteger(L, UBUS_STATUS_INVALID_ARGUMENT);
+ return 2;
+ }
+
+ req = lua_touserdata(L, 2);
+ ubus_send_reply(c->ctx, req, c->buf.head);
+
+ return 0;
+}
+
+static int ubus_lua_load_methods(lua_State *L, struct ubus_method *m)
+{
+ struct blobmsg_policy *p;
+ int plen;
+ int pidx = 0;
+
+ /* get the function pointer */
+ lua_pushinteger(L, 1);
+ lua_gettable(L, -2);
+
+ /* get the policy table */
+ lua_pushinteger(L, 2);
+ lua_gettable(L, -3);
+ plen = lua_gettablelen(L, -1);
+
+ /* check if the method table is valid */
+ if ((lua_type(L, -2) != LUA_TFUNCTION) ||
+ (lua_type(L, -1) != LUA_TTABLE) ||
+ lua_objlen(L, -1) || !plen) {
+ lua_pop(L, 2);
+ return 1;
+ }
+
+ /* store function pointer */
+ lua_pushvalue(L, -2);
+ lua_setfield(L, -6, lua_tostring(L, -5));
+
+ /* setup the policy pointers */
+ p = malloc(sizeof(struct blobmsg_policy) * plen);
+ memset(p, 0, sizeof(struct blobmsg_policy) * plen);
+ m->policy = p;
+ lua_pushnil(L);
+ while (lua_next(L, -2) != 0) {
+ int val = lua_tointeger(L, -1);
+
+ /* check if the policy is valid */
+ if ((lua_type(L, -2) != LUA_TSTRING) ||
+ (lua_type(L, -1) != LUA_TNUMBER) ||
+ (val < 0) ||
+ (val > BLOBMSG_TYPE_LAST)) {
+ lua_pop(L, 1);
+ continue;
+ }
+ p[pidx].name = lua_tostring(L, -2);
+ p[pidx].type = val;
+ lua_pop(L, 1);
+ pidx++;
+ }
+
+ m->n_policy = pidx;
+ m->name = lua_tostring(L, -4);
+ m->handler = ubus_method_handler;
+ lua_pop(L, 2);
+
+ return 0;
+}
+
+static struct ubus_object* ubus_lua_load_object(lua_State *L)
+{
+ struct ubus_lua_object *obj = NULL;
+ int mlen = lua_gettablelen(L, -1);
+ struct ubus_method *m;
+ int midx = 0;
+
+ /* setup object pointers */
+ obj = malloc(sizeof(struct ubus_lua_object));
+ memset(obj, 0, sizeof(struct ubus_lua_object));
+ obj->o.name = lua_tostring(L, -2);
+
+ /* setup method pointers */
+ m = malloc(sizeof(struct ubus_method) * mlen);
+ memset(m, 0, sizeof(struct ubus_method) * mlen);
+ obj->o.methods = m;
+
+ /* setup type pointers */
+ obj->o.type = malloc(sizeof(struct ubus_object_type));
+ memset(obj->o.type, 0, sizeof(struct ubus_object_type));
+ obj->o.type->name = lua_tostring(L, -2);
+ obj->o.type->id = 0;
+ obj->o.type->methods = obj->o.methods;
+
+ /* create the he callback lookup table */
+ lua_createtable(L, 1, 0);
+ lua_getglobal(L, "__ubus_cb");
+ lua_pushvalue(L, -2);
+ obj->r = luaL_ref(L, -2);
+ lua_pop(L, 1);
+
+ /* scan each method */
+ lua_pushnil(L);
+ while (lua_next(L, -3) != 0) {
+ /* check if it looks like a method */
+ if ((lua_type(L, -2) != LUA_TSTRING) ||
+ (lua_type(L, -1) != LUA_TTABLE) ||
+ !lua_objlen(L, -1)) {
+ lua_pop(L, 1);
+ continue;
+ }
+
+ if (!ubus_lua_load_methods(L, &m[midx]))
+ midx++;
+ lua_pop(L, 1);
+ }
+
+ obj->o.type->n_methods = obj->o.n_methods = midx;
+
+ /* pop the callback table */
+ lua_pop(L, 1);
+
+ return &obj->o;
+}
+
+static int ubus_lua_add(lua_State *L)
+{
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+
+ /* verify top level object */
+ if (lua_istable(L, 1)) {
+ lua_pushstring(L, "you need to pass a table");
+ lua_error(L);
+ return 0;
+ }
+
+ /* scan each object */
+ lua_pushnil(L);
+ while (lua_next(L, -2) != 0) {
+ struct ubus_object *obj = NULL;
+
+ /* check if the object has a table of methods */
+ if ((lua_type(L, -2) == LUA_TSTRING) && (lua_type(L, -1) == LUA_TTABLE)) {
+ obj = ubus_lua_load_object(L);
+
+ if (obj)
+ ubus_add_object(c->ctx, obj);
+ }
+ lua_pop(L, 1);
+ }
+
+ return 0;
+}
static void
ubus_lua_signatures_cb(struct ubus_context *c, struct ubus_object_data *o, void *p)
static int
ubus_lua_call(lua_State *L)
{
- int rv;
+ int rv, top;
uint32_t id;
struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
const char *path = luaL_checkstring(L, 2);
return 2;
}
+ top = lua_gettop(L);
rv = ubus_invoke(c->ctx, id, func, c->buf.head, ubus_lua_call_cb, L, c->timeout * 1000);
if (rv != UBUS_STATUS_OK)
return 2;
}
- return 1;
+ return lua_gettop(L) - top;
}
static const luaL_Reg ubus[] = {
{ "connect", ubus_lua_connect },
{ "objects", ubus_lua_objects },
+ { "add", ubus_lua_add },
+ { "reply", ubus_lua_reply },
{ "signatures", ubus_lua_signatures },
{ "call", ubus_lua_call },
{ "close", ubus_lua__gc },
/* create module */
luaL_register(L, MODNAME, ubus);
+ /* set some enum defines */
+ lua_pushinteger(L, BLOBMSG_TYPE_ARRAY);
+ lua_setfield(L, -2, "ARRAY");
+ lua_pushinteger(L, BLOBMSG_TYPE_TABLE);
+ lua_setfield(L, -2, "TABLE");
+ lua_pushinteger(L, BLOBMSG_TYPE_STRING);
+ lua_setfield(L, -2, "STRING");
+ lua_pushinteger(L, BLOBMSG_TYPE_INT64);
+ lua_setfield(L, -2, "INT64");
+ lua_pushinteger(L, BLOBMSG_TYPE_INT32);
+ lua_setfield(L, -2, "INT32");
+ lua_pushinteger(L, BLOBMSG_TYPE_INT16);
+ lua_setfield(L, -2, "INT16");
+ lua_pushinteger(L, BLOBMSG_TYPE_INT8);
+ lua_setfield(L, -2, "INT8");
+ lua_pushinteger(L, BLOBMSG_TYPE_BOOL);
+ lua_setfield(L, -2, "BOOLEAN");
+
+ /* used in our callbacks */
+ state = L;
+
+ /* create the callback table */
+ lua_createtable(L, 1, 0);
+ lua_setglobal(L, "__ubus_cb");
+
return 0;
}
projects / oweals / ubus.git / commitdiff