/*
* Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
+ * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
+ * Copyright (C) 2016 Iain Fraser <iainf@netduma.com>
*
* 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>
+#include <lua.h>
+#define MODNAME "ubus"
+#define METANAME MODNAME ".meta"
-#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;
+ int rsubscriber;
+};
+
+struct ubus_lua_event {
+ struct ubus_event_handler e;
+ int r;
+};
+
+struct ubus_lua_subscriber {
+ struct ubus_subscriber s;
+ int rnotify;
+ int rremove;
+};
static int
ubus_lua_parse_blob(lua_State *L, struct blob_attr *attr, bool table);
int len;
int off = 0;
void *data;
- char buf[32];
if (!blobmsg_check_attr(attr, false))
return 0;
break;
case BLOBMSG_TYPE_INT64:
- /* NB: Lua cannot handle 64bit, format value as string and push that */
- sprintf(buf, "%lld", (long long int) be64_to_cpu(*(uint64_t *)data));
- lua_pushstring(L, buf);
+ lua_pushnumber(L, (double) be64_to_cpu(*(uint64_t *)data));
break;
case BLOBMSG_TYPE_STRING:
if (lua_type(L, -2) != LUA_TNUMBER)
#endif
{
- lua_pop(L, 1);
+ lua_pop(L, 2);
return false;
}
if ((cur - 1) != prv)
{
- lua_pop(L, 1);
+ lua_pop(L, 2);
return false;
}
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);
+ int rv = 0;
+
+ lua_getglobal(state, "__ubus_cb");
+ lua_rawgeti(state, -1, o->r);
+ lua_getfield(state, -1, method);
+ lua_remove(state, -2);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ lua_pushlightuserdata(state, req);
+ if (!msg)
+ lua_pushnil(state);
+ else
+ ubus_lua_parse_blob_array(state, blob_data(msg), blob_len(msg), true);
+ lua_call(state, 2, 1);
+ if (lua_isnumber(state, -1))
+ rv = lua_tonumber(state, -1);
+ }
+
+ lua_pop(state, 1);
+
+ return rv;
+}
+
+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);
+
+ /* check if the method table is valid */
+ if ((lua_type(L, -2) != LUA_TFUNCTION) ||
+ (lua_type(L, -1) != LUA_TTABLE) ||
+ lua_objlen(L, -1)) {
+ lua_pop(L, 2);
+ return 1;
+ }
+
+ /* store function pointer */
+ lua_pushvalue(L, -2);
+ lua_setfield(L, -6, lua_tostring(L, -5));
+
+ m->name = lua_tostring(L, -4);
+ m->handler = ubus_method_handler;
+
+ plen = lua_gettablelen(L, -1);
+
+ /* exit if policy table is empty */
+ if (!plen) {
+ lua_pop(L, 2);
+ return 0;
+ }
+
+ /* setup the policy pointers */
+ p = malloc(sizeof(struct blobmsg_policy) * plen);
+ if (!p)
+ return 1;
+
+ 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;
+ lua_pop(L, 2);
+
+ return 0;
+}
+
+static void
+ubus_new_sub_cb(struct ubus_context *ctx, struct ubus_object *obj)
+{
+ struct ubus_lua_object *luobj;
+
+ luobj = container_of(obj, struct ubus_lua_object, o);
+
+ lua_getglobal(state, "__ubus_cb_publisher");
+ lua_rawgeti(state, -1, luobj->rsubscriber);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ lua_pushnumber(state, luobj->o.has_subscribers );
+ lua_call(state, 1, 0);
+ } else {
+ lua_pop(state, 1);
+ }
+}
+
+static void
+ubus_lua_load_newsub_cb( lua_State *L, struct ubus_lua_object *obj )
+{
+ /* keep ref to func */
+ lua_getglobal(L, "__ubus_cb_publisher");
+ lua_pushvalue(L, -2);
+ obj->rsubscriber = luaL_ref(L, -2);
+ lua_pop(L, 1);
+
+ /* real callback */
+ obj->o.subscribe_cb = ubus_new_sub_cb;
+ return;
+}
+
+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));
+ if (!obj)
+ return NULL;
+
+ 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));
+ if (!obj->o.type) {
+ free(obj);
+ return NULL;
+ }
+
+ 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 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 its the subscriber notification callback */
+ if( lua_type( L, -2 ) == LUA_TSTRING &&
+ lua_type( L, -1 ) == LUA_TFUNCTION ){
+ if( !strcmp( lua_tostring( L, -2 ), "__subscriber_cb" ) )
+ ubus_lua_load_newsub_cb( L, obj );
+ }
+
+ /* 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);
+
+ /* allow future reference of ubus obj */
+ lua_pushstring(state,"__ubusobj");
+ lua_pushlightuserdata(state, obj);
+ lua_settable(state,-3);
+ }
+ }
+ lua_pop(L, 1);
+ }
+
+ return 0;
+}
+
+static int
+ubus_lua_notify( lua_State *L )
+{
+ struct ubus_lua_connection *c;
+ struct ubus_object *obj;
+ const char* method;
+
+ c = luaL_checkudata(L, 1, METANAME);
+ method = luaL_checkstring(L, 3);
+ luaL_checktype(L, 4, LUA_TTABLE);
+
+ if( !lua_islightuserdata( L, 2 ) ){
+ lua_pushfstring( L, "Invald 2nd parameter, expected ubus obj ref" );
+ lua_error( L );
+ }
+ obj = lua_touserdata( L, 2 );
+
+ /* create parameters from table */
+ blob_buf_init(&c->buf, 0);
+ if( !ubus_lua_format_blob_array( L, &c->buf, true ) ){
+ lua_pushfstring( L, "Invalid 4th parameter, expected table of arguments" );
+ lua_error( L );
+ }
+
+ ubus_notify( c->ctx, obj, method, c->buf.head, -1 );
+ return 0;
+}
static void
ubus_lua_signatures_cb(struct ubus_context *c, struct ubus_object_data *o, void *p)
{
lua_State *L = (lua_State *)req->priv;
- if (!msg)
+ if (!msg && L)
lua_pushnil(L);
- ubus_lua_parse_blob_array(L, blob_data(msg), blob_len(msg), true);
+ if (msg && L)
+ ubus_lua_parse_blob_array(L, blob_data(msg), blob_len(msg), true);
}
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 void
+ubus_event_handler(struct ubus_context *ctx, struct ubus_event_handler *ev,
+ const char *type, struct blob_attr *msg)
+{
+ struct ubus_lua_event *listener = container_of(ev, struct ubus_lua_event, e);
+
+ lua_getglobal(state, "__ubus_cb_event");
+ lua_rawgeti(state, -1, listener->r);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ ubus_lua_parse_blob_array(state, blob_data(msg), blob_len(msg), true);
+ lua_call(state, 1, 0);
+ } else {
+ lua_pop(state, 1);
+ }
+}
+
+static struct ubus_event_handler*
+ubus_lua_load_event(lua_State *L)
+{
+ struct ubus_lua_event* event = NULL;
+
+ event = malloc(sizeof(struct ubus_lua_event));
+ if (!event)
+ return NULL;
+
+ memset(event, 0, sizeof(struct ubus_lua_event));
+ event->e.cb = ubus_event_handler;
+
+ /* update the he callback lookup table */
+ lua_getglobal(L, "__ubus_cb_event");
+ lua_pushvalue(L, -2);
+ event->r = luaL_ref(L, -2);
+ lua_setfield(L, -1, lua_tostring(L, -3));
+
+ return &event->e;
+}
+
+static int
+ubus_lua_listen(lua_State *L) {
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+
+ /* verify top level object */
+ luaL_checktype(L, 2, LUA_TTABLE);
+
+ /* scan each object */
+ lua_pushnil(L);
+ while (lua_next(L, -2) != 0) {
+ struct ubus_event_handler *listener;
+
+ /* check if the key is a string and the value is a method */
+ if ((lua_type(L, -2) == LUA_TSTRING) && (lua_type(L, -1) == LUA_TFUNCTION)) {
+ listener = ubus_lua_load_event(L);
+ if(listener != NULL) {
+ ubus_register_event_handler(c->ctx, listener, lua_tostring(L, -2));
+ }
+ }
+ lua_pop(L, 1);
+ }
+ return 0;
+}
+
+static void
+ubus_sub_remove_handler(struct ubus_context *ctx, struct ubus_subscriber *s,
+ uint32_t id)
+{
+ struct ubus_lua_subscriber *sub;
+
+ sub = container_of(s, struct ubus_lua_subscriber, s);
+
+ lua_getglobal(state, "__ubus_cb_subscribe");
+ lua_rawgeti(state, -1, sub->rremove);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ lua_call(state, 0, 0);
+ } else {
+ lua_pop(state, 1);
+ }
}
+static int
+ubus_sub_notify_handler(struct ubus_context *ctx, struct ubus_object *obj,
+ struct ubus_request_data *req, const char *method,
+ struct blob_attr *msg)
+{
+ struct ubus_subscriber *s;
+ struct ubus_lua_subscriber *sub;
+
+ s = container_of(obj, struct ubus_subscriber, obj);
+ sub = container_of(s, struct ubus_lua_subscriber, s);
+
+ lua_getglobal(state, "__ubus_cb_subscribe");
+ lua_rawgeti(state, -1, sub->rnotify);
+ lua_remove(state, -2);
+
+ if (lua_isfunction(state, -1)) {
+ if( msg ){
+ ubus_lua_parse_blob_array(state, blob_data(msg), blob_len(msg), true);
+ lua_call(state, 1, 0);
+ } else {
+ lua_call(state, 0, 0);
+ }
+ } else {
+ lua_pop(state, 1);
+ }
+
+ return 0;
+}
+
+
+
+static void
+ubus_lua_do_subscribe( struct ubus_context *ctx, lua_State *L, const char* target,
+ int idxnotify, int idxremove )
+{
+ uint32_t id;
+ int status;
+ struct ubus_lua_subscriber *sub;
+
+ if( ( status = ubus_lookup_id( ctx, target, &id ) ) ){
+ lua_pushfstring( L, "Unable find target, status=%d", status );
+ lua_error( L );
+ }
+
+ sub = malloc( sizeof( struct ubus_lua_subscriber ) );
+ memset( sub, 0, sizeof( struct ubus_lua_subscriber ) );
+ if( !sub ){
+ lua_pushstring( L, "Out of memory" );
+ lua_error( L );
+ }
+
+ if( idxnotify ){
+ lua_getglobal(L, "__ubus_cb_subscribe");
+ lua_pushvalue(L, idxnotify);
+ sub->rnotify = luaL_ref(L, -2);
+ lua_pop(L, 1);
+ sub->s.cb = ubus_sub_notify_handler;
+ }
+
+ if( idxremove ){
+ lua_getglobal(L, "__ubus_cb_subscribe");
+ lua_pushvalue(L, idxnotify);
+ sub->rnotify = luaL_ref(L, -2);
+ lua_pop(L, 1);
+ sub->s.remove_cb = ubus_sub_remove_handler;
+ }
+
+ if( ( status = ubus_register_subscriber( ctx, &sub->s ) ) ){
+ lua_pushfstring( L, "Failed to register subscriber, status=%d", status );
+ lua_error( L );
+ }
+
+ if( ( status = ubus_subscribe( ctx, &sub->s, id) ) ){
+ lua_pushfstring( L, "Failed to register subscriber, status=%d", status );
+ lua_error( L );
+ }
+}
+
+static int
+ubus_lua_subscribe(lua_State *L) {
+ int idxnotify, idxremove, stackstart;
+ struct ubus_lua_connection *c;
+ const char* target;
+
+ idxnotify = idxremove = 0;
+ stackstart = lua_gettop( L );
+
+
+ c = luaL_checkudata(L, 1, METANAME);
+ target = luaL_checkstring(L, 2);
+ luaL_checktype(L, 3, LUA_TTABLE);
+
+
+ lua_pushstring( L, "notify");
+ lua_gettable( L, 3 );
+ if( lua_type( L, -1 ) == LUA_TFUNCTION ){
+ idxnotify = lua_gettop( L );
+ } else {
+ lua_pop( L, 1 );
+ }
+
+ lua_pushstring( L, "remove");
+ lua_gettable( L, 3 );
+ if( lua_type( L, -1 ) == LUA_TFUNCTION ){
+ idxremove = lua_gettop( L );
+ } else {
+ lua_pop( L, 1 );
+ }
+
+ if( idxnotify )
+ ubus_lua_do_subscribe( c->ctx, L, target, idxnotify, idxremove );
+
+ if( lua_gettop( L ) > stackstart )
+ lua_pop( L, lua_gettop( L ) - stackstart );
+
+ return 0;
+}
+
+static int
+ubus_lua_send(lua_State *L)
+{
+ struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+ const char *event = luaL_checkstring(L, 2);
+
+ if (*event == 0)
+ return luaL_argerror(L, 2, "no event name");
+
+ // Event content convert to ubus form
+ 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;
+ }
+
+ // Send the event
+ ubus_send_event(c->ctx, event, c->buf.head);
+
+ return 0;
+}
+
+
static int
ubus_lua__gc(lua_State *L)
{
struct ubus_lua_connection *c = luaL_checkudata(L, 1, METANAME);
+ blob_buf_free(&c->buf);
if (c->ctx != NULL)
{
ubus_free(c->ctx);
static const luaL_Reg ubus[] = {
{ "connect", ubus_lua_connect },
{ "objects", ubus_lua_objects },
+ { "add", ubus_lua_add },
+ { "notify", ubus_lua_notify },
+ { "reply", ubus_lua_reply },
{ "signatures", ubus_lua_signatures },
{ "call", ubus_lua_call },
{ "close", ubus_lua__gc },
+ { "listen", ubus_lua_listen },
+ { "send", ubus_lua_send },
+ { "subscribe", ubus_lua_subscribe },
{ "__gc", ubus_lua__gc },
{ NULL, NULL },
};
/* 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");
+
+ /* create the event table */
+ lua_createtable(L, 1, 0);
+ lua_setglobal(L, "__ubus_cb_event");
+
+ /* create the subscriber table */
+ lua_createtable(L, 1, 0);
+ lua_setglobal(L, "__ubus_cb_subscribe");
+
+ /* create the publisher table - notifications of new subs */
+ lua_createtable(L, 1, 0);
+ lua_setglobal(L, "__ubus_cb_publisher");
return 0;
}
projects / project / ubus.git / blobdiff