diff options
Diffstat (limited to 'controller/ctl-lua.c')
| -rw-r--r-- | controller/ctl-lua.c | 1081 |
1 files changed, 1081 insertions, 0 deletions
diff --git a/controller/ctl-lua.c b/controller/ctl-lua.c new file mode 100644 index 0000000..7b68fe2 --- /dev/null +++ b/controller/ctl-lua.c @@ -0,0 +1,1081 @@ +/* + * 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-config.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) { + + json_object *argsJ= LuaPopArgs(luaState, LUA_FIST_ARG+1); + int response = (*callback) (funcname, argsJ); + + // push response to LUA + lua_pushinteger(luaState, response); + return 1; +} + +// Call a Lua function from a control action +PUBLIC int LuaCallFunc (CtlActionT *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_pushstring(luaState, action->source.label); + + // 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)); + strncat(luaScriptPath,target, sizeof(luaScriptPath)); + 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)); + strncat (luaScriptPath, filename, sizeof(luaScriptPath)); + } + } + + 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)); + 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 */ +}; + +// Load Lua Interpreter +PUBLIC int LuaConfigLoad () { + + + // 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"); + + return 0; + + OnErrorExit: + return 1; +} + +// Create Binding Event at Init Exec Time +PUBLIC int LuaConfigExec () { + + int err, index; + // 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;; + } + + // search for default policy config file + char fullprefix[CONTROL_MAXPATH_LEN]; + strncpy (fullprefix, CONTROL_CONFIG_PRE "-", sizeof(fullprefix)); + strncat (fullprefix, GetBinderName(), sizeof(fullprefix)); + strncat (fullprefix, "-", sizeof(fullprefix)); + + const char *dirList= getenv("CONTROL_LUA_PATH"); + if (!dirList) dirList=CONTROL_LUA_PATH; + + // special case for no lua even when avaliable + if (!strcasecmp ("/dev/null", dirList)) { + return 0; + } + + json_object *luaScriptPathJ = ScanForConfig(dirList , CTL_SCAN_RECURSIVE, fullprefix, "lua"); + + // 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)); + strncat(filepath, filename, sizeof(filepath)); + 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; +} |