2 * Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
3 * Copyright (C) 2012 John Crispin <blogic@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
17 #include <libubox/blobmsg.h>
18 #include <libubox/blobmsg_json.h>
22 #define MODNAME "ubus"
23 #define METANAME MODNAME ".meta"
25 static lua_State
*state
;
27 struct ubus_lua_connection
{
30 struct ubus_context
*ctx
;
33 struct ubus_lua_object
{
39 ubus_lua_parse_blob(lua_State
*L
, struct blob_attr
*attr
, bool table
);
42 ubus_lua_parse_blob_array(lua_State
*L
, struct blob_attr
*attr
, int len
, bool table
)
47 struct blob_attr
*pos
;
51 __blob_for_each_attr(pos
, attr
, rem
)
53 rv
= ubus_lua_parse_blob(L
, pos
, table
);
58 lua_rawseti(L
, -2, idx
++);
65 ubus_lua_parse_blob(lua_State
*L
, struct blob_attr
*attr
, bool table
)
72 if (!blobmsg_check_attr(attr
, false))
75 if (table
&& blobmsg_name(attr
)[0])
77 lua_pushstring(L
, blobmsg_name(attr
));
81 data
= blobmsg_data(attr
);
82 len
= blobmsg_data_len(attr
);
84 switch (blob_id(attr
))
86 case BLOBMSG_TYPE_BOOL
:
87 lua_pushboolean(L
, *(uint8_t *)data
);
90 case BLOBMSG_TYPE_INT16
:
91 lua_pushinteger(L
, be16_to_cpu(*(uint16_t *)data
));
94 case BLOBMSG_TYPE_INT32
:
95 lua_pushinteger(L
, be32_to_cpu(*(uint32_t *)data
));
98 case BLOBMSG_TYPE_INT64
:
99 /* NB: Lua cannot handle 64bit, format value as string and push that */
100 sprintf(buf
, "%lld", (long long int) be64_to_cpu(*(uint64_t *)data
));
101 lua_pushstring(L
, buf
);
104 case BLOBMSG_TYPE_STRING
:
105 lua_pushstring(L
, data
);
108 case BLOBMSG_TYPE_ARRAY
:
109 ubus_lua_parse_blob_array(L
, data
, len
, false);
112 case BLOBMSG_TYPE_TABLE
:
113 ubus_lua_parse_blob_array(L
, data
, len
, true);
126 ubus_lua_format_blob_is_array(lua_State
*L
)
131 /* Find out whether table is array-like */
132 for (lua_pushnil(L
); lua_next(L
, -2); lua_pop(L
, 1))
135 if (lua_type(L
, -2) != LUA_TNUMBER
&& lua_type(L
, -2) != LUA_TINT
)
137 if (lua_type(L
, -2) != LUA_TNUMBER
)
144 cur
= lua_tointeger(L
, -2);
146 if ((cur
- 1) != prv
)
159 ubus_lua_format_blob_array(lua_State
*L
, struct blob_buf
*b
, bool table
);
162 ubus_lua_format_blob(lua_State
*L
, struct blob_buf
*b
, bool table
)
166 const char *key
= table
? lua_tostring(L
, -2) : NULL
;
168 switch (lua_type(L
, -1))
171 blobmsg_add_u8(b
, key
, (uint8_t)lua_toboolean(L
, -1));
178 blobmsg_add_u32(b
, key
, (uint32_t)lua_tointeger(L
, -1));
183 case LUA_TLIGHTUSERDATA
:
184 blobmsg_add_string(b
, key
, lua_tostring(L
, -1));
188 if (ubus_lua_format_blob_is_array(L
))
190 c
= blobmsg_open_array(b
, key
);
191 rv
= ubus_lua_format_blob_array(L
, b
, false);
192 blobmsg_close_array(b
, c
);
196 c
= blobmsg_open_table(b
, key
);
197 rv
= ubus_lua_format_blob_array(L
, b
, true);
198 blobmsg_close_table(b
, c
);
211 ubus_lua_format_blob_array(lua_State
*L
, struct blob_buf
*b
, bool table
)
213 for (lua_pushnil(L
); lua_next(L
, -2); lua_pop(L
, 1))
215 if (!ubus_lua_format_blob(L
, b
, table
))
227 ubus_lua_connect(lua_State
*L
)
229 struct ubus_lua_connection
*c
;
230 const char *sockpath
= luaL_optstring(L
, 1, NULL
);
231 int timeout
= luaL_optint(L
, 2, 30);
233 if ((c
= lua_newuserdata(L
, sizeof(*c
))) != NULL
&&
234 (c
->ctx
= ubus_connect(sockpath
)) != NULL
)
236 ubus_add_uloop(c
->ctx
);
237 c
->timeout
= timeout
;
238 memset(&c
->buf
, 0, sizeof(c
->buf
));
239 luaL_getmetatable(L
, METANAME
);
240 lua_setmetatable(L
, -2);
244 /* NB: no errors from ubus_connect() yet */
246 lua_pushinteger(L
, UBUS_STATUS_UNKNOWN_ERROR
);
252 ubus_lua_objects_cb(struct ubus_context
*c
, struct ubus_object_data
*o
, void *p
)
254 lua_State
*L
= (lua_State
*)p
;
256 lua_pushstring(L
, o
->path
);
257 lua_rawseti(L
, -2, lua_objlen(L
, -2) + 1);
261 ubus_lua_objects(lua_State
*L
)
264 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
267 rv
= ubus_lookup(c
->ctx
, NULL
, ubus_lua_objects_cb
, L
);
269 if (rv
!= UBUS_STATUS_OK
)
273 lua_pushinteger(L
, rv
);
281 ubus_method_handler(struct ubus_context
*ctx
, struct ubus_object
*obj
,
282 struct ubus_request_data
*req
, const char *method
,
283 struct blob_attr
*msg
)
285 struct ubus_lua_object
*o
= container_of(obj
, struct ubus_lua_object
, o
);
287 lua_getglobal(state
, "__ubus_cb");
288 lua_rawgeti(state
, -1, o
->r
);
289 lua_getfield(state
, -1, method
);
291 if (lua_isfunction(state
, -1)) {
292 lua_pushlightuserdata(state
, req
);
293 lua_call(state
, 1, 0);
298 static int lua_gettablelen(lua_State
*L
, int index
)
304 while (lua_next(L
, index
) != 0) {
312 static int ubus_lua_reply(lua_State
*L
)
314 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
315 struct ubus_request_data
*req
;
317 luaL_checktype(L
, 3, LUA_TTABLE
);
318 blob_buf_init(&c
->buf
, 0);
320 if (!ubus_lua_format_blob_array(L
, &c
->buf
, true))
323 lua_pushinteger(L
, UBUS_STATUS_INVALID_ARGUMENT
);
327 req
= lua_touserdata(L
, 2);
328 ubus_send_reply(c
->ctx
, req
, c
->buf
.head
);
333 static int ubus_lua_load_methods(lua_State
*L
, struct ubus_method
*m
)
335 struct blobmsg_policy
*p
;
339 /* get the function pointer */
340 lua_pushinteger(L
, 1);
343 /* get the policy table */
344 lua_pushinteger(L
, 2);
346 plen
= lua_gettablelen(L
, -1);
348 /* check if the method table is valid */
349 if ((lua_type(L
, -2) != LUA_TFUNCTION
) ||
350 (lua_type(L
, -1) != LUA_TTABLE
) ||
351 lua_objlen(L
, -1) || !plen
) {
356 /* store function pointer */
357 lua_pushvalue(L
, -2);
358 lua_setfield(L
, -6, lua_tostring(L
, -5));
360 /* setup the policy pointers */
361 p
= malloc(sizeof(struct blobmsg_policy
) * plen
);
362 memset(p
, 0, sizeof(struct blobmsg_policy
) * plen
);
365 while (lua_next(L
, -2) != 0) {
366 int val
= lua_tointeger(L
, -1);
368 /* check if the policy is valid */
369 if ((lua_type(L
, -2) != LUA_TSTRING
) ||
370 (lua_type(L
, -1) != LUA_TNUMBER
) ||
372 (val
> BLOBMSG_TYPE_LAST
)) {
376 p
[pidx
].name
= lua_tostring(L
, -2);
383 m
->name
= lua_tostring(L
, -4);
384 m
->handler
= ubus_method_handler
;
390 static struct ubus_object
* ubus_lua_load_object(lua_State
*L
)
392 struct ubus_lua_object
*obj
= NULL
;
393 int mlen
= lua_gettablelen(L
, -1);
394 struct ubus_method
*m
;
397 /* setup object pointers */
398 obj
= malloc(sizeof(struct ubus_lua_object
));
399 memset(obj
, 0, sizeof(struct ubus_lua_object
));
400 obj
->o
.name
= lua_tostring(L
, -2);
402 /* setup method pointers */
403 m
= malloc(sizeof(struct ubus_method
) * mlen
);
404 memset(m
, 0, sizeof(struct ubus_method
) * mlen
);
407 /* setup type pointers */
408 obj
->o
.type
= malloc(sizeof(struct ubus_object_type
));
409 memset(obj
->o
.type
, 0, sizeof(struct ubus_object_type
));
410 obj
->o
.type
->name
= lua_tostring(L
, -2);
412 obj
->o
.type
->methods
= obj
->o
.methods
;
414 /* create the he callback lookup table */
415 lua_createtable(L
, 1, 0);
416 lua_getglobal(L
, "__ubus_cb");
417 lua_pushvalue(L
, -2);
418 obj
->r
= luaL_ref(L
, -2);
421 /* scan each method */
423 while (lua_next(L
, -3) != 0) {
424 /* check if it looks like a method */
425 if ((lua_type(L
, -2) != LUA_TSTRING
) ||
426 (lua_type(L
, -1) != LUA_TTABLE
) ||
427 !lua_objlen(L
, -1)) {
432 if (!ubus_lua_load_methods(L
, &m
[midx
]))
437 obj
->o
.type
->n_methods
= obj
->o
.n_methods
= midx
;
439 /* pop the callback table */
445 static int ubus_lua_add(lua_State
*L
)
447 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
449 /* verify top level object */
450 if (lua_istable(L
, 1)) {
451 lua_pushstring(L
, "you need to pass a table");
456 /* scan each object */
458 while (lua_next(L
, -2) != 0) {
459 struct ubus_object
*obj
= NULL
;
461 /* check if the object has a table of methods */
462 if ((lua_type(L
, -2) == LUA_TSTRING
) && (lua_type(L
, -1) == LUA_TTABLE
)) {
463 obj
= ubus_lua_load_object(L
);
466 ubus_add_object(c
->ctx
, obj
);
475 ubus_lua_signatures_cb(struct ubus_context
*c
, struct ubus_object_data
*o
, void *p
)
477 lua_State
*L
= (lua_State
*)p
;
482 ubus_lua_parse_blob_array(L
, blob_data(o
->signature
), blob_len(o
->signature
), true);
486 ubus_lua_signatures(lua_State
*L
)
489 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
490 const char *path
= luaL_checkstring(L
, 2);
492 rv
= ubus_lookup(c
->ctx
, path
, ubus_lua_signatures_cb
, L
);
494 if (rv
!= UBUS_STATUS_OK
)
498 lua_pushinteger(L
, rv
);
507 ubus_lua_call_cb(struct ubus_request
*req
, int type
, struct blob_attr
*msg
)
509 lua_State
*L
= (lua_State
*)req
->priv
;
514 ubus_lua_parse_blob_array(L
, blob_data(msg
), blob_len(msg
), true);
518 ubus_lua_call(lua_State
*L
)
522 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
523 const char *path
= luaL_checkstring(L
, 2);
524 const char *func
= luaL_checkstring(L
, 3);
526 luaL_checktype(L
, 4, LUA_TTABLE
);
527 blob_buf_init(&c
->buf
, 0);
529 if (!ubus_lua_format_blob_array(L
, &c
->buf
, true))
532 lua_pushinteger(L
, UBUS_STATUS_INVALID_ARGUMENT
);
536 rv
= ubus_lookup_id(c
->ctx
, path
, &id
);
541 lua_pushinteger(L
, rv
);
546 rv
= ubus_invoke(c
->ctx
, id
, func
, c
->buf
.head
, ubus_lua_call_cb
, L
, c
->timeout
* 1000);
548 if (rv
!= UBUS_STATUS_OK
)
552 lua_pushinteger(L
, rv
);
556 return lua_gettop(L
) - top
;
561 ubus_lua__gc(lua_State
*L
)
563 struct ubus_lua_connection
*c
= luaL_checkudata(L
, 1, METANAME
);
568 memset(c
, 0, sizeof(*c
));
574 static const luaL_Reg ubus
[] = {
575 { "connect", ubus_lua_connect
},
576 { "objects", ubus_lua_objects
},
577 { "add", ubus_lua_add
},
578 { "reply", ubus_lua_reply
},
579 { "signatures", ubus_lua_signatures
},
580 { "call", ubus_lua_call
},
581 { "close", ubus_lua__gc
},
582 { "__gc", ubus_lua__gc
},
586 /* avoid missing prototype warning */
587 int luaopen_ubus(lua_State
*L
);
590 luaopen_ubus(lua_State
*L
)
592 /* create metatable */
593 luaL_newmetatable(L
, METANAME
);
595 /* metatable.__index = metatable */
596 lua_pushvalue(L
, -1);
597 lua_setfield(L
, -2, "__index");
600 luaL_register(L
, NULL
, ubus
);
604 luaL_register(L
, MODNAME
, ubus
);
606 /* set some enum defines */
607 lua_pushinteger(L
, BLOBMSG_TYPE_ARRAY
);
608 lua_setfield(L
, -2, "ARRAY");
609 lua_pushinteger(L
, BLOBMSG_TYPE_TABLE
);
610 lua_setfield(L
, -2, "TABLE");
611 lua_pushinteger(L
, BLOBMSG_TYPE_STRING
);
612 lua_setfield(L
, -2, "STRING");
613 lua_pushinteger(L
, BLOBMSG_TYPE_INT64
);
614 lua_setfield(L
, -2, "INT64");
615 lua_pushinteger(L
, BLOBMSG_TYPE_INT32
);
616 lua_setfield(L
, -2, "INT32");
617 lua_pushinteger(L
, BLOBMSG_TYPE_INT16
);
618 lua_setfield(L
, -2, "INT16");
619 lua_pushinteger(L
, BLOBMSG_TYPE_INT8
);
620 lua_setfield(L
, -2, "INT8");
621 lua_pushinteger(L
, BLOBMSG_TYPE_BOOL
);
622 lua_setfield(L
, -2, "BOOLEAN");
624 /* used in our callbacks */
627 /* create the callback table */
628 lua_createtable(L
, 1, 0);
629 lua_setglobal(L
, "__ubus_cb");