diff options
Diffstat (limited to 'ctl-binding/ctl-lua.c')
| -rw-r--r-- | ctl-binding/ctl-lua.c | 1068 |
1 files changed, 0 insertions, 1068 deletions
diff --git a/ctl-binding/ctl-lua.c b/ctl-binding/ctl-lua.c deleted file mode 100644 index 2c80205..0000000 --- a/ctl-binding/ctl-lua.c +++ /dev/null @@ -1,1068 +0,0 @@ -/* - * Copyright (C) 2016 "IoT.bzh" - * Author Fulup Ar Foll <fulup@iot.bzh> - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * ref: - * (manual) https://www.lua.org/manual/5.3/manual.html - * (lua->C) http://www.troubleshooters.com/codecorn/lua/lua_c_calls_lua.htm#_Anatomy_of_a_Lua_Call - * (lua/C Var) http://acamara.es/blog/2012/08/passing-variables-from-lua-5-2-to-c-and-vice-versa/ - * (Lua/C Lib)https://john.nachtimwald.com/2014/07/12/wrapping-a-c-library-in-lua/ - * (Lua/C Table) https://gist.github.com/SONIC3D/10388137 - * (Lua/C Nested table) https://stackoverflow.com/questions/45699144/lua-nested-table-from-lua-to-c - * (Lua/C Wrapper) https://stackoverflow.com/questions/45699950/lua-passing-handle-to-function-created-with-newlib - * - */ - -#define _GNU_SOURCE -#include <stdio.h> -#include <string.h> - - -#include "ctl-binding.h" -#include "wrap-json.h" - -#define LUA_FIST_ARG 2 // when using luaL_newlib calllback receive libtable as 1st arg -#define LUA_MSG_MAX_LENGTH 512 -#define JSON_ERROR (json_object*)-1 -static afb_req NULL_AFBREQ = {}; - - -static lua_State* luaState; - -#define CTX_MAGIC 123456789 -#define CTX_TOKEN "AFB_ctx" - -typedef struct { - char *name; - int count; - afb_event event; -} LuaAfbEvent; -static LuaAfbEvent *luaDefaultEvt; - -typedef struct { - int ctxMagic; - afb_req request; - void *handle; - char *info; -} LuaAfbContextT; - -typedef struct { - const char *callback; - json_object *context; - void *handle; -} LuaCallServiceT; - -typedef enum { - AFB_MSG_INFO, - AFB_MSG_WARNING, - AFB_MSG_NOTICE, - AFB_MSG_DEBUG, - AFB_MSG_ERROR, -} LuaAfbMessageT; - -/* - * Note(Fulup): I fail to use luaL_setmetatable and replaced it with a simple opaque - * handle while waiting for someone smarter than me to find a better solution - * https://stackoverflow.com/questions/45596493/lua-using-lua-newuserdata-from-lua-pcall - */ - -STATIC LuaAfbContextT *LuaCtxCheck (lua_State *luaState, int index) { - LuaAfbContextT *afbContext; - //luaL_checktype(luaState, index, LUA_TUSERDATA); - //afbContext = (LuaAfbContextT *)luaL_checkudata(luaState, index, CTX_TOKEN); - luaL_checktype(luaState, index, LUA_TLIGHTUSERDATA); - afbContext = (LuaAfbContextT *) lua_touserdata(luaState, index); - if (afbContext == NULL && afbContext->ctxMagic != CTX_MAGIC) { - luaL_error(luaState, "Fail to retrieve user data context=%s", CTX_TOKEN); - AFB_ERROR ("afbContextCheck error retrieving afbContext"); - return NULL; - } - return afbContext; -} - -STATIC LuaAfbContextT *LuaCtxPush (lua_State *luaState, afb_req request, void *handle, const char* info) { - // LuaAfbContextT *afbContext = (LuaAfbContextT *)lua_newuserdata(luaState, sizeof(LuaAfbContextT)); - // luaL_setmetatable(luaState, CTX_TOKEN); - LuaAfbContextT *afbContext = (LuaAfbContextT *)calloc(1, sizeof(LuaAfbContextT)); - lua_pushlightuserdata(luaState, afbContext); - if (!afbContext) { - AFB_ERROR ("LuaCtxPush fail to allocate user data context"); - return NULL; - } - afbContext->ctxMagic=CTX_MAGIC; - afbContext->info=strdup(info); - afbContext->request= request; - afbContext->handle= handle; - return afbContext; -} - -STATIC void LuaCtxFree (LuaAfbContextT *afbContext) { - free(afbContext->info); - free(afbContext); -} - -// Push a json structure on the stack as a LUA table -STATIC int LuaPushArgument (json_object *argsJ) { - - //AFB_NOTICE("LuaPushArgument argsJ=%s", json_object_get_string(argsJ)); - - json_type jtype= json_object_get_type(argsJ); - switch (jtype) { - case json_type_object: { - lua_newtable (luaState); - json_object_object_foreach (argsJ, key, val) { - int done = LuaPushArgument (val); - if (done) { - lua_setfield(luaState,-2, key); - } - } - break; - } - case json_type_array: { - int length= json_object_array_length(argsJ); - lua_newtable (luaState); - for (int idx=0; idx < length; idx ++) { - json_object *val=json_object_array_get_idx(argsJ, idx); - LuaPushArgument (val); - lua_seti (luaState,-2, idx); - } - break; - } - case json_type_int: - lua_pushinteger(luaState, json_object_get_int(argsJ)); - break; - case json_type_string: - lua_pushstring(luaState, json_object_get_string(argsJ)); - break; - case json_type_boolean: - lua_pushboolean(luaState, json_object_get_boolean(argsJ)); - break; - case json_type_double: - lua_pushnumber(luaState, json_object_get_double(argsJ)); - break; - case json_type_null: - AFB_WARNING("LuaPushArgument: NULL object type %s", json_object_get_string(argsJ)); - return 0; - break; - - default: - AFB_ERROR("LuaPushArgument: unsupported Json object type %s", json_object_get_string(argsJ)); - return 0; - } - return 1; -} - -STATIC json_object *LuaPopOneArg (lua_State* luaState, int idx); - -// Move a table from Internal Lua representation to Json one -// Numeric table are transformed in json array, string one in object -// Mix numeric/string key are not supported -STATIC json_object *LuaTableToJson (lua_State* luaState, int index) { - #define LUA_KEY_INDEX -2 - #define LUA_VALUE_INDEX -1 - - int idx; - int tableType; - json_object *tableJ= NULL; - - lua_pushnil(luaState); // 1st key - if (index < 0) index--; - for (idx=1; lua_next(luaState, index) != 0; idx++) { - - // uses 'key' (at index -2) and 'value' (at index -1) - if (lua_type(luaState,LUA_KEY_INDEX) == LUA_TSTRING) { - - if (!tableJ) { - tableJ= json_object_new_object(); - tableType=LUA_TSTRING; - } else if (tableType != LUA_TSTRING){ - AFB_ERROR("MIX Lua Table with key string/numeric not supported"); - return NULL; - } - - const char *key= lua_tostring(luaState, LUA_KEY_INDEX); - json_object *argJ= LuaPopOneArg(luaState, LUA_VALUE_INDEX); - json_object_object_add(tableJ, key, argJ); - - } else { - if (!tableJ) { - tableJ= json_object_new_array(); - tableType=LUA_TNUMBER; - } else if(tableType != LUA_TNUMBER) { - AFB_ERROR("MIX Lua Table with key numeric/string not supported"); - return NULL; - } - - json_object *argJ= LuaPopOneArg(luaState, LUA_VALUE_INDEX); - json_object_array_add(tableJ, argJ); - } - - - lua_pop(luaState, 1); // removes 'value'; keeps 'key' for next iteration - } - - // Query is empty free empty json object - if (idx == 1) { - json_object_put(tableJ); - return NULL; - } - return tableJ; -} - -STATIC json_object *LuaPopOneArg (lua_State* luaState, int idx) { - json_object *value=NULL; - - int luaType = lua_type(luaState, idx); - switch(luaType) { - case LUA_TNUMBER: { - lua_Number number= lua_tonumber(luaState, idx);; - int nombre = (int)number; // evil trick to determine wether n fits in an integer. (stolen from ltcl.c) - if (number == nombre) { - value= json_object_new_int((int)number); - } else { - value= json_object_new_double(number); - } - break; - } - case LUA_TBOOLEAN: - value= json_object_new_boolean(lua_toboolean(luaState, idx)); - break; - case LUA_TSTRING: - value= json_object_new_string(lua_tostring(luaState, idx)); - break; - case LUA_TTABLE: - value= LuaTableToJson(luaState, idx); - break; - case LUA_TNIL: - value=json_object_new_string("nil") ; - break; - case LUA_TUSERDATA: - value=json_object_new_int64((int64_t)lua_touserdata(luaState, idx)); // store userdata as int !!! - break; - - default: - AFB_NOTICE ("LuaPopOneArg: script returned Unknown/Unsupported idx=%d type:%d/%s", idx, luaType, lua_typename(luaState, luaType)); - value=NULL; - } - - return value; -} - -static json_object *LuaPopArgs (lua_State* luaState, int start) { - json_object *responseJ; - - int stop = lua_gettop(luaState); - if(stop-start <0) return NULL; - - // start at 2 because we are using a function array lib - if (start == stop) { - responseJ=LuaPopOneArg (luaState, start); - } else { - // loop on remaining return arguments - responseJ= json_object_new_array(); - for (int idx=start; idx <= stop; idx++) { - json_object *argJ=LuaPopOneArg (luaState, idx); - if (!argJ) goto OnErrorExit; - json_object_array_add(responseJ, argJ); - } - } - - return responseJ; - - OnErrorExit: - return NULL; -} - - -STATIC int LuaFormatMessage(lua_State* luaState, LuaAfbMessageT action) { - char *message; - - json_object *responseJ= LuaPopArgs(luaState, LUA_FIST_ARG); - - if (!responseJ) { - luaL_error(luaState,"LuaFormatMessage empty message"); - goto OnErrorExit; - } - - // if we have only on argument just return the value. - if (json_object_get_type(responseJ)!=json_type_array || json_object_array_length(responseJ) <2) { - message= (char*)json_object_get_string(responseJ); - goto PrintMessage; - } - - // extract format and push all other parameter on the stack - message = alloca (LUA_MSG_MAX_LENGTH); - const char *format = json_object_get_string(json_object_array_get_idx(responseJ, 0)); - - int arrayIdx=1; - int targetIdx=0; - - for (int idx=0; format[idx] !='\0'; idx++) { - - if (format[idx]=='%' && format[idx] !='\0') { - json_object *slotJ= json_object_array_get_idx(responseJ, arrayIdx); - //if (slotJ) AFB_NOTICE("**** idx=%d slotJ=%s", arrayIdx, json_object_get_string(slotJ)); - - - switch (format[++idx]) { - case 'd': - if (slotJ) targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"%d", json_object_get_int(slotJ)); - else targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"nil"); - arrayIdx++; - break; - case 'f': - if (slotJ) targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"%f", json_object_get_double(slotJ)); - else targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"nil"); - arrayIdx++; - break; - - case'%': - message[targetIdx]='%'; - targetIdx++; - break; - - case 's': - default: - if (slotJ) targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"%s", json_object_get_string(slotJ)); - else targetIdx += snprintf (&message[targetIdx], LUA_MSG_MAX_LENGTH-targetIdx,"nil"); - arrayIdx++; - } - - } else { - if (targetIdx >= LUA_MSG_MAX_LENGTH) { - AFB_WARNING ("LuaFormatMessage: message[%s] owerverflow LUA_MSG_MAX_LENGTH=%d", format, LUA_MSG_MAX_LENGTH); - targetIdx --; // move backward for EOL - break; - } else { - message[targetIdx++] = format[idx]; - } - } - } - message[targetIdx]='\0'; - -PrintMessage: - switch (action) { - case AFB_MSG_WARNING: - AFB_WARNING ("%s", message); - break; - case AFB_MSG_NOTICE: - AFB_NOTICE ("%s", message); - break; - case AFB_MSG_DEBUG: - AFB_DEBUG ("%s", message); - break; - case AFB_MSG_INFO: - AFB_INFO ("%s", message); - break; - case AFB_MSG_ERROR: - default: - AFB_ERROR ("%s", message); - } - return 0; // nothing return to lua - - OnErrorExit: // on argument to return (the error message) - return 1; -} - -STATIC int LuaPrintInfo(lua_State* luaState) { - int err=LuaFormatMessage (luaState, AFB_MSG_INFO); - return err; -} - -STATIC int LuaPrintError(lua_State* luaState) { - int err=LuaFormatMessage (luaState, AFB_MSG_ERROR); - return err; // no value return -} - -STATIC int LuaPrintWarning(lua_State* luaState) { - int err=LuaFormatMessage (luaState, AFB_MSG_WARNING); - return err; -} - -STATIC int LuaPrintNotice(lua_State* luaState) { - int err=LuaFormatMessage (luaState, AFB_MSG_NOTICE); - return err; -} - -STATIC int LuaPrintDebug(lua_State* luaState) { - int err=LuaFormatMessage (luaState, AFB_MSG_DEBUG); - return err; -} - -STATIC int LuaAfbSuccess(lua_State* luaState) { - LuaAfbContextT *afbContext= LuaCtxCheck(luaState, LUA_FIST_ARG); - if (!afbContext) goto OnErrorExit; - - // ignore context argument - json_object *responseJ= LuaPopArgs(luaState, LUA_FIST_ARG+1); - if (responseJ == JSON_ERROR) return 1; - - afb_req_success(afbContext->request, responseJ, NULL); - - LuaCtxFree(afbContext); - return 0; - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC int LuaAfbFail(lua_State* luaState) { - LuaAfbContextT *afbContext= LuaCtxCheck(luaState, LUA_FIST_ARG); - if (!afbContext) goto OnErrorExit; - - json_object *responseJ= LuaPopArgs(luaState, LUA_FIST_ARG+1); - if (responseJ == JSON_ERROR) return 1; - - afb_req_fail(afbContext->request, afbContext->info, json_object_get_string(responseJ)); - - LuaCtxFree(afbContext); - return 0; - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC void LuaAfbServiceCB(void *handle, int iserror, struct json_object *responseJ) { - LuaCallServiceT *contextCB= (LuaCallServiceT*)handle; - int count=1; - - lua_getglobal(luaState, contextCB->callback); - - // push error status & response - lua_pushboolean(luaState, iserror); - count+= LuaPushArgument(responseJ); - count+= LuaPushArgument(contextCB->context); - - int err=lua_pcall(luaState, count, LUA_MULTRET, 0); - if (err) { - AFB_ERROR ("LUA-SERICE-CB:FAIL response=%s err=%s", json_object_get_string(responseJ), lua_tostring(luaState,-1) ); - } - - free (contextCB); -} - - -STATIC int LuaAfbService(lua_State* luaState) { - int count = lua_gettop(luaState); - - // note: argument start at 2 because of AFB: table - if (count <5 || !lua_isstring(luaState, 2) || !lua_isstring(luaState, 3) || !lua_istable(luaState, 4) || !lua_isstring(luaState, 5)) { - lua_pushliteral (luaState, "ERROR: syntax AFB:service(api, verb, {[Lua Table]})"); - goto OnErrorExit; - } - - // get api/verb+query - const char *api = lua_tostring(luaState,2); - const char *verb= lua_tostring(luaState,3); - json_object *queryJ= LuaTableToJson(luaState, 4); - if (queryJ == JSON_ERROR) return 1; - - LuaCallServiceT *contextCB = calloc (1, sizeof(LuaCallServiceT)); - contextCB->callback= lua_tostring(luaState, 5); - contextCB->context = LuaPopArgs(luaState, 6); - - afb_service_call(api, verb, queryJ, LuaAfbServiceCB, contextCB); - - return 0; // no value return - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC int LuaAfbServiceSync(lua_State* luaState) { - int count = lua_gettop(luaState); - json_object *responseJ; - - // note: argument start at 2 because of AFB: table - if (count <3 || !lua_isstring(luaState, 2) || !lua_isstring(luaState, 3) || !lua_istable(luaState, 4)) { - lua_pushliteral (luaState, "ERROR: syntax AFB:servsync(api, verb, {[Lua Table]})"); - goto OnErrorExit; - } - - // get api/verb+query - const char *api = lua_tostring(luaState,2); - const char *verb= lua_tostring(luaState,3); - json_object *queryJ= LuaTableToJson(luaState, 4); - - int iserror=afb_service_call_sync (api, verb, queryJ, &responseJ); - - // push error status & response - count=1; lua_pushboolean(luaState, iserror); - count+= LuaPushArgument(responseJ); - - return count; // return count values - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC int LuaAfbEventPush(lua_State* luaState) { - LuaAfbEvent *afbevt; - int index; - - // if no private event handle then use default binding event - if (lua_islightuserdata(luaState, LUA_FIST_ARG)) { - afbevt = (LuaAfbEvent*) lua_touserdata(luaState, LUA_FIST_ARG); - index=LUA_FIST_ARG+1; - } else { - index=LUA_FIST_ARG; - afbevt=luaDefaultEvt; - } - - if (!afb_event_is_valid(afbevt->event)) { - lua_pushliteral (luaState, "LuaAfbMakePush-Fail invalid event"); - goto OnErrorExit; - } - - json_object *ctlEventJ= LuaTableToJson(luaState, index); - if (!ctlEventJ) { - lua_pushliteral (luaState, "LuaAfbEventPush-Syntax is AFB:signal ([evtHandle], {lua table})"); - goto OnErrorExit; - } - - int done = afb_event_push(afbevt->event, ctlEventJ); - if (!done) { - lua_pushliteral (luaState, "LuaAfbEventPush-Fail No Subscriber to event"); - AFB_ERROR ("LuaAfbEventPush-Fail name subscriber event=%s count=%d", afbevt->name, afbevt->count); - goto OnErrorExit; - } - afbevt->count++; - return 0; - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC int LuaAfbEventSubscribe(lua_State* luaState) { - LuaAfbEvent *afbevt; - - LuaAfbContextT *afbContext= LuaCtxCheck(luaState, LUA_FIST_ARG); - if (!afbContext) { - lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail Invalid request handle"); - goto OnErrorExit; - } - - // if no private event handle then use default binding event - if (lua_islightuserdata(luaState, LUA_FIST_ARG+1)) { - afbevt = (LuaAfbEvent*) lua_touserdata(luaState, LUA_FIST_ARG+1); - } else { - afbevt=luaDefaultEvt; - } - - if (!afb_event_is_valid(afbevt->event)) { - lua_pushliteral (luaState, "LuaAfbMakePush-Fail invalid event handle"); - goto OnErrorExit; - } - - int err = afb_req_subscribe(afbContext->request, afbevt->event); - if (err) { - lua_pushliteral (luaState, "LuaAfbEventSubscribe-Fail No Subscriber to event"); - AFB_ERROR ("LuaAfbEventPush-Fail name subscriber event=%s count=%d", afbevt->name, afbevt->count); - goto OnErrorExit; - } - afbevt->count++; - return 0; - - OnErrorExit: - lua_error(luaState); - return 1; -} - -STATIC int LuaAfbEventMake(lua_State* luaState) { - int count = lua_gettop(luaState); - LuaAfbEvent *afbevt=calloc(1,sizeof(LuaAfbEvent)); - - if (count != LUA_FIST_ARG || !lua_isstring(luaState, LUA_FIST_ARG)) { - lua_pushliteral (luaState, "LuaAfbEventMake-Syntax is evtHandle= AFB:event ('myEventName')"); - goto OnErrorExit; - } - - // event name should be the only argument - afbevt->name= strdup (lua_tostring(luaState,LUA_FIST_ARG)); - - // create a new binder event - afbevt->event = afb_daemon_make_event(afbevt->name); - if (!afb_event_is_valid(afbevt->event)) { - lua_pushliteral (luaState, "LuaAfbEventMake-Fail to Create Binder event"); - goto OnErrorExit; - } - - // push event handler as a LUA opaque handle - lua_pushlightuserdata(luaState, afbevt); - return 1; - - OnErrorExit: - lua_error(luaState); - return 1; -} - -// Function call from LUA when lua2c plugin L2C is used -PUBLIC int Lua2cWrapper(lua_State* luaState, char *funcname, Lua2cFunctionT callback, void *context) { - - json_object *argsJ= LuaPopArgs(luaState, LUA_FIST_ARG+1); - int response = (*callback) (funcname, argsJ, context); - - // push response to LUA - lua_pushinteger(luaState, response); - return 1; -} - -// Generated some fake event based on watchdog/counter -PUBLIC int LuaCallFunc (DispatchSourceT source, DispatchActionT *action, json_object *queryJ) { - - int err, count; - - json_object* argsJ = action->argsJ; - const char* func = action->call; - - // load function (should exist in CONTROL_PATH_LUA - lua_getglobal(luaState, func); - - // push source on the stack - count=1; - lua_pushinteger(luaState, source); - - // push argsJ on the stack - if (!argsJ) { - lua_pushnil(luaState); - count++; - } else { - count+= LuaPushArgument (argsJ); - } - - // push queryJ on the stack - if (!queryJ) { - lua_pushnil(luaState); - count++; - } else { - count+= LuaPushArgument (queryJ); - } - - // effectively exec LUA script code - err=lua_pcall(luaState, count, 1, 0); - if (err) { - AFB_ERROR("LuaCallFunc Fail calling %s error=%s", func, lua_tostring(luaState,-1)); - goto OnErrorExit; - } - - // return LUA script value - int rc= (int)lua_tointeger(luaState, -1); - return rc; - - OnErrorExit: - return -1; -} - - -// Execute LUA code from received API request -STATIC void LuaDoAction (LuaDoActionT action, afb_req request) { - - int err, count=0; - - json_object* queryJ = afb_req_json(request); - - switch (action) { - - case LUA_DOSTRING: { - const char *script = json_object_get_string(queryJ); - err=luaL_loadstring(luaState, script); - if (err) { - AFB_ERROR ("LUA-DO-COMPILE:FAIL String=%s err=%s", script, lua_tostring(luaState,-1) ); - goto OnErrorExit; - } - // Push AFB client context on the stack - LuaAfbContextT *afbContext= LuaCtxPush(luaState, request,NULL,script); - if (!afbContext) goto OnErrorExit; - - break; - } - - case LUA_DOCALL: { - const char *func; - json_object *argsJ=NULL; - - err= wrap_json_unpack (queryJ, "{s:s, s?o !}", "target", &func, "args", &argsJ); - if (err) { - AFB_ERROR ("LUA-DOCALL-SYNTAX missing target|args query=%s", json_object_get_string(queryJ)); - goto OnErrorExit; - } - - // load function (should exist in CONTROL_PATH_LUA - lua_getglobal(luaState, func); - - // Push AFB client context on the stack - LuaAfbContextT *afbContext= LuaCtxPush(luaState, request, NULL, func); - if (!afbContext) goto OnErrorExit; - - // push query on the stack - if (!argsJ) { - lua_pushnil(luaState); - count++; - } else { - count+= LuaPushArgument (argsJ); - } - - break; - } - - case LUA_DOSCRIPT: { // Fulup need to fix argument passing - char *filename; char*fullpath; - char luaScriptPath[CONTROL_MAXPATH_LEN]; - int index; - - // scan luascript search path once - static json_object *luaScriptPathJ =NULL; - - // extract value from query - const char *target=NULL,*func=NULL; - json_object *argsJ=NULL; - err= wrap_json_unpack (queryJ, "{s:s,s?s,s?s,s?o !}","target", &target,"path",&luaScriptPathJ,"function",&func,"args",&argsJ); - if (err) { - AFB_ERROR ("LUA-DOSCRIPT-SYNTAX:missing target|[path]|[function]|[args] query=%s", json_object_get_string(queryJ)); - goto OnErrorExit; - } - - // search for filename=script in CONTROL_LUA_PATH - if (!luaScriptPathJ) { - strncpy(luaScriptPath,CONTROL_DOSCRIPT_PRE, sizeof(luaScriptPath)); - strncat(luaScriptPath,"-", sizeof(luaScriptPath)-strlen(luaScriptPath)-1); - strncat(luaScriptPath,target, sizeof(luaScriptPath)-strlen(luaScriptPath)-1); - luaScriptPathJ= ScanForConfig(CONTROL_LUA_PATH , CTL_SCAN_RECURSIVE,luaScriptPath,".lua"); - } - for (index=0; index < json_object_array_length(luaScriptPathJ); index++) { - json_object *entryJ=json_object_array_get_idx(luaScriptPathJ, index); - - err= wrap_json_unpack (entryJ, "{s:s, s:s !}", "fullpath", &fullpath,"filename", &filename); - if (err) { - AFB_ERROR ("LUA-DOSCRIPT-SCAN:HOOPs invalid config file path = %s", json_object_get_string(entryJ)); - goto OnErrorExit; - } - - if (index > 0) AFB_WARNING("LUA-DOSCRIPT-SCAN:Ignore second script=%s path=%s", filename, fullpath); - else { - strncpy (luaScriptPath, fullpath, sizeof(luaScriptPath)); - strncat (luaScriptPath, "/", sizeof(luaScriptPath)-strlen(luaScriptPath)-1); - strncat (luaScriptPath, filename, sizeof(luaScriptPath)-strlen(luaScriptPath)-1); - } - } - - err= luaL_loadfile(luaState, luaScriptPath); - if (err) { - AFB_ERROR ("LUA-DOSCRIPT HOOPs Error in LUA loading scripts=%s err=%s", luaScriptPath, lua_tostring(luaState,-1)); - goto OnErrorExit; - } - - // script was loaded we need to parse to make it executable - err=lua_pcall(luaState, 0, 0, 0); - if (err) { - AFB_ERROR ("LUA-DOSCRIPT:FAIL to load %s", luaScriptPath); - goto OnErrorExit; - } - - // if no func name given try to deduct from filename - if (!func && (func=(char*)GetMidleName(filename))!=NULL) { - strncpy(luaScriptPath,"_", sizeof(luaScriptPath)); - strncat(luaScriptPath,func, sizeof(luaScriptPath)-strlen(luaScriptPath)-1); - func=luaScriptPath; - } - if (!func) { - AFB_ERROR ("LUA-DOSCRIPT:FAIL to deduct funcname from %s", filename); - goto OnErrorExit; - } - - // load function (should exist in CONTROL_PATH_LUA - lua_getglobal(luaState, func); - - // Push AFB client context on the stack - LuaAfbContextT *afbContext= LuaCtxPush(luaState, request, NULL, func); - if (!afbContext) goto OnErrorExit; - - // push function arguments - if (!argsJ) { - lua_pushnil(luaState); - count++; - } else { - count+= LuaPushArgument(argsJ); - } - - break; - } - - default: - AFB_ERROR ("LUA-DOSCRIPT-ACTION unknown query=%s", json_object_get_string(queryJ)); - goto OnErrorExit; - } - - // effectively exec LUA code (afb_reply/fail done later from callback) - err=lua_pcall(luaState, count+1, 0, 0); - if (err) { - AFB_ERROR ("LUA-DO-EXEC:FAIL query=%s err=%s", json_object_get_string(queryJ), lua_tostring(luaState,-1)); - goto OnErrorExit; - } - return; - - OnErrorExit: - afb_req_fail(request,"LUA:ERROR", lua_tostring(luaState,-1)); - return; -} - -PUBLIC void ctlapi_execlua (afb_req request) { - LuaDoAction (LUA_DOSTRING, request); -} - -PUBLIC void ctlapi_request (afb_req request) { - LuaDoAction (LUA_DOCALL, request); -} - -PUBLIC void ctlapi_debuglua (afb_req request) { - LuaDoAction (LUA_DOSCRIPT, request); -} - -STATIC int LuaTimerClear (lua_State* luaState) { - - // Get Timer Handle - LuaAfbContextT *afbContext= LuaCtxCheck(luaState, LUA_FIST_ARG); - if (!afbContext) goto OnErrorExit; - - // retrieve useful information opaque handle - TimerHandleT *timerHandle = (TimerHandleT*)afbContext->handle; - - AFB_NOTICE ("LuaTimerClear timer=%s", timerHandle->label); - TimerEvtStop(timerHandle); - - return 0; //happy end - -OnErrorExit: - return 1; -} -STATIC int LuaTimerGet (lua_State* luaState) { - - // Get Timer Handle - LuaAfbContextT *afbContext= LuaCtxCheck(luaState, LUA_FIST_ARG); - if (!afbContext) goto OnErrorExit; - - // retrieve useful information opaque handle - TimerHandleT *timerHandle = (TimerHandleT*)afbContext->handle; - - // create response as a JSON object - json_object *responseJ= json_object_new_object(); - json_object_object_add(responseJ,"label", json_object_new_string(timerHandle->label)); - json_object_object_add(responseJ,"delay", json_object_new_int(timerHandle->delay)); - json_object_object_add(responseJ,"count", json_object_new_int(timerHandle->count)); - - // return JSON object as Lua table - int count=LuaPushArgument(responseJ); - - // free json object - json_object_put(responseJ); - - return count; // return argument - -OnErrorExit: - return 0; -} - -// Timer Callback - -// Set timer -STATIC int LuaTimerSetCB (void *handle) { - LuaCallServiceT *contextCB =(LuaCallServiceT*) handle; - TimerHandleT *timerHandle = (TimerHandleT*) contextCB->handle; - int count; - - // push timer handle and user context on Lua stack - lua_getglobal(luaState, contextCB->callback); - - // Push timer handle - LuaAfbContextT *afbContext= LuaCtxPush(luaState, NULL_AFBREQ, contextCB->handle, timerHandle->label); - if (!afbContext) goto OnErrorExit; - count=1; - - // Push user Context - count+= LuaPushArgument(contextCB->context); - - int err=lua_pcall(luaState, count, LUA_MULTRET, 0); - if (err) { - AFB_ERROR ("LUA-TIMER-CB:FAIL response=%s err=%s", json_object_get_string(contextCB->context), lua_tostring(luaState,-1)); - goto OnErrorExit; - } - - // get return parameter - if (!lua_isboolean(luaState, -1)) { - return (lua_toboolean(luaState, -1)); - } - - // timer last run free context resource - if (timerHandle->count == 1) { - LuaCtxFree(afbContext); - } - return 0; // By default we are happy - - OnErrorExit: - return 1; // stop timer -} - -STATIC int LuaTimerSet(lua_State* luaState) { - const char *label=NULL, *info=NULL; - int delay=0, count=0; - - json_object *timerJ = LuaPopOneArg(luaState, LUA_FIST_ARG); - const char *callback = lua_tostring(luaState, LUA_FIST_ARG + 1); - json_object *contextJ = LuaPopOneArg(luaState, LUA_FIST_ARG + 2); - - if (lua_gettop(luaState) != LUA_FIST_ARG+2 || !timerJ || !callback || !contextJ) { - lua_pushliteral(luaState, "LuaTimerSet-Syntax timerset (timerT, 'callback', contextT)"); - goto OnErrorExit; - } - - int err = wrap_json_unpack(timerJ, "{ss, s?s si, si !}", "label", &label, "info", &info, "delay", &delay, "count", &count); - if (err) { - lua_pushliteral(luaState, "LuaTimerSet-Syntax timerT={label:xxx delay:ms, count:xx}"); - goto OnErrorExit; - } - - // everything look fine create timer structure - TimerHandleT *timerHandle = malloc (sizeof (TimerHandleT)); - timerHandle->delay=delay; - timerHandle->count=count; - timerHandle->label=label; - - // Allocate handle to store context and callback - LuaCallServiceT *contextCB = calloc (1, sizeof(LuaCallServiceT)); - contextCB->callback= callback; - contextCB->context = contextJ; - contextCB->handle = timerHandle; - - // fire timer - TimerEvtStart (timerHandle, LuaTimerSetCB, contextCB); - - return 0; // Happy No Return Function - -OnErrorExit: - lua_error(luaState); - return 1; // return error code -} - -// Register a new L2c list of LUA user plugin commands -PUBLIC void LuaL2cNewLib(const char *label, luaL_Reg *l2cFunc, int count) { - // luaL_newlib(luaState, l2cFunc); macro does not work with pointer :( - luaL_checkversion(luaState); - lua_createtable(luaState, 0, count+1); - luaL_setfuncs(luaState,l2cFunc,0); - lua_setglobal(luaState, label); -} - -static const luaL_Reg afbFunction[] = { - {"timerclear", LuaTimerClear}, - {"timerget" , LuaTimerGet}, - {"timerset" , LuaTimerSet}, - {"notice" , LuaPrintNotice}, - {"info" , LuaPrintInfo}, - {"warning" , LuaPrintWarning}, - {"debug" , LuaPrintDebug}, - {"error" , LuaPrintError}, - {"servsync" , LuaAfbServiceSync}, - {"service" , LuaAfbService}, - {"success" , LuaAfbSuccess}, - {"fail" , LuaAfbFail}, - {"subscribe" , LuaAfbEventSubscribe}, - {"evtmake" , LuaAfbEventMake}, - {"evtpush" , LuaAfbEventPush}, - - {NULL, NULL} /* sentinel */ -}; - -// Create Binding Event at Init -PUBLIC int LuaLibInit () { - int err, index; - - // search for default policy config file - char fullprefix[CONTROL_MAXPATH_LEN]; - strncpy (fullprefix, CONTROL_CONFIG_PRE "-", sizeof(fullprefix)); - strncat (fullprefix, GetBinderName(), sizeof(fullprefix)-strlen(fullprefix)-1); - strncat (fullprefix, "-", sizeof(fullprefix)-strlen(fullprefix)-1); - - const char *dirList= getenv("CONTROL_LUA_PATH"); - if (!dirList) dirList=CONTROL_LUA_PATH; - - json_object *luaScriptPathJ = ScanForConfig(dirList , CTL_SCAN_RECURSIVE, fullprefix, "lua"); - - // open a new LUA interpretor - luaState = luaL_newstate(); - if (!luaState) { - AFB_ERROR ("LUA_INIT: Fail to open lua interpretor"); - goto OnErrorExit; - } - - // load auxiliary libraries - luaL_openlibs(luaState); - - // redirect print to AFB_NOTICE - luaL_newlib(luaState, afbFunction); - lua_setglobal(luaState, "AFB"); - - // create default lua event to send test pause/resume - luaDefaultEvt=calloc(1,sizeof(LuaAfbEvent)); - luaDefaultEvt->name=CONTROL_LUA_EVENT; - luaDefaultEvt->event = afb_daemon_make_event(CONTROL_LUA_EVENT); - if (!afb_event_is_valid(luaDefaultEvt->event)) { - AFB_ERROR ("POLCTL_INIT: Cannot register lua-events=%s ", CONTROL_LUA_EVENT); - goto OnErrorExit;; - } - - // load+exec any file found in LUA search path - for (index=0; index < json_object_array_length(luaScriptPathJ); index++) { - json_object *entryJ=json_object_array_get_idx(luaScriptPathJ, index); - - char *filename; char*fullpath; - err= wrap_json_unpack (entryJ, "{s:s, s:s !}", "fullpath", &fullpath,"filename", &filename); - if (err) { - AFB_ERROR ("LUA-INIT HOOPs invalid config file path = %s", json_object_get_string(entryJ)); - goto OnErrorExit; - } - - char filepath[CONTROL_MAXPATH_LEN]; - strncpy(filepath, fullpath, sizeof(filepath)); - strncat(filepath, "/", sizeof(filepath)-strlen(filepath)-1); - strncat(filepath, filename, sizeof(filepath)-strlen(filepath)-1); - err= luaL_loadfile(luaState, filepath); - if (err) { - AFB_ERROR ("LUA-LOAD HOOPs Error in LUA loading scripts=%s err=%s", filepath, lua_tostring(luaState,-1)); - goto OnErrorExit; - } - - // exec/compil script - err = lua_pcall(luaState, 0, 0, 0); - if (err) { - AFB_ERROR ("LUA-LOAD HOOPs Error in LUA exec scripts=%s err=%s", filepath, lua_tostring(luaState,-1)); - goto OnErrorExit; - } - } - - // no policy config found remove control API from binder - if (index == 0) { - AFB_WARNING ("POLICY-INIT:WARNING (setenv CONTROL_LUA_PATH) No LUA '%s*.lua' in '%s'", fullprefix, dirList); - } - - AFB_DEBUG ("Audio control-LUA Init Done"); - return 0; - - OnErrorExit: - return 1; -} |