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/*
* 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, something express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <dirent.h>
#include <json-c/json_object.h>
#include "wrap-json.h"
#include "ctl-binding.h"
STATIC PolicyCtlConfigT *ctlHandle = NULL;
// List Avaliable Configuration Files
STATIC json_object* ScanForConfig (char* searchPath) {
json_object *responseJ;
DIR *dirHandle;
char *dirPath;
char* dirList= strdup(searchPath);
responseJ = json_object_new_array();
for (dirPath= strtok(dirList, ":"); dirPath && *dirPath; dirPath=strtok(NULL,":")) {
struct dirent *dirEnt;
dirHandle = opendir (dirPath);
if (!dirHandle) {
AFB_NOTICE ("CONFIG-SCANNING dir=%s not readable", dirPath);
continue;
}
AFB_NOTICE ("CONFIG-SCANNING:ctl_listconfig scanning: %s", dirPath);
while ((dirEnt = readdir(dirHandle)) != NULL) {
// Unknown type is accepted to support dump filesystems
if (dirEnt->d_type == DT_REG || dirEnt->d_type == DT_UNKNOWN) {
struct json_object *pathJ = json_object_new_object();
json_object_object_add(pathJ, "dirpath", json_object_new_string(dirPath));
json_object_object_add(pathJ, "filename", json_object_new_string(dirEnt->d_name));
json_object_array_add(responseJ, pathJ);
}
}
}
free (dirList);
return (responseJ);
}
PUBLIC void ctlapi_authorize (PolicyCtlEnumT control, afb_req request) {
json_object*tmpJ;
json_object* queryJ= afb_req_json(request);
int done=json_object_object_get_ex(queryJ, "closing", &tmpJ);
if (done) return;
}
// List Avaliable Configuration Files
PUBLIC void ctlapi_config (struct afb_req request) {
json_object*tmpJ;
char *dirList;
json_object* queryJ = afb_req_json(request);
if (queryJ && json_object_object_get_ex (queryJ, "cfgpath" , &tmpJ)) {
dirList = strdup (json_object_get_string(tmpJ));
} else {
dirList = strdup (CONTROL_CONFIG_PATH);
AFB_NOTICE ("CONFIG-MISSING: use default CONTROL_CONFIG_PATH=%s", CONTROL_CONFIG_PATH);
}
// get list of config file
struct json_object *responseJ = ScanForConfig(dirList);
if (json_object_array_length(responseJ) == 0) {
afb_req_fail(request, "CONFIGPATH:EMPTY", "No Config Found in CONTROL_CONFIG_PATH");
} else {
afb_req_success(request, responseJ, NULL);
}
return;
}
STATIC PolicyActionT **PolicyLoadActions (json_object *actionsJ) {
int err;
PolicyActionT ** actions;
// unpack individual action object
int actionUnpack (json_object *actionJ, PolicyActionT *action) {
err= wrap_json_unpack(actionJ, "{ss,s?s,s?s,s?s,s?s,s?s !}"
, "label",&action->label, "info",&action->info, "callback",&action->callback, "query",&queryJ, "api",&action->api, "verb", &action->verb);
if (err) {
AFB_ERROR ("POLICY-LOAD-ACTION Missing something label|info|callback|api|verb|query in %s", json_object_get_string(actionJ));
return -1;
}
if (!action->callback || !(action->api && action->verb)) {
AFB_ERROR ("POLICY-LOAD-ACTION Missing something callback|(api+verb) in %s", json_object_get_string(actionJ));
return -1;
}
return 0;
};
// action array is close with a nullvalue;
if (json_object_get_type(actionsJ) == json_type_array) {
int count = json_object_array_length(actionsJ);
actions = calloc (count+1, sizeof(PolicyActionT));
for (int idx=0; idx < count; idx++) {
json_object *actionJ = json_object_array_get_idx(actionsJ, idx);
err = actionUnpack (actionJ, &actions[idx]);
if (err) goto OnErrorExit;
}
} else {
actions = calloc (2, sizeof(PolicyActionT));
err = actionUnpack (actionsJ, &actions[0]);
if (err) goto OnErrorExit;
}
return actions;
OnErrorExit:
return NULL;
}
// load control policy from file using json_unpack https://jansson.readthedocs.io/en/2.9/apiref.html#parsing-and-validating-values
STATIC PolicyCtlConfigT *PolicyLoadConfig (const char* filepath) {
json_object *policyConfigJ, *ignoreJ, *actionsJ;
PolicyCtlConfigT *policyConfig = calloc (1, sizeof(PolicyCtlConfigT));
int err;
// Load JSON file
policyConfigJ= json_object_from_file(filepath);
if (!policyConfigJ) goto OnErrorExit;
json_object *metadataJ, *onloadJ, *controlsJ, *eventsJ;
err= wrap_json_unpack(policyConfigJ, "{s?o,so,s?o,so,so !}", "$schema", &ignoreJ, "metadata",&metadataJ, "onload",&onloadJ, "controls",&controlsJ, "events",&eventsJ);
if (err) {
AFB_ERROR ("POLICY-LOAD-ERRROR Missing something metadata|onload|controls|events in %s", json_object_get_string(policyConfigJ));
goto OnErrorExit;
}
PolicyHandleT *policyHandle = calloc (1, sizeof(PolicyHandleT));
err= wrap_json_unpack(metadataJ, "{so,s?s,s?s !}", "label", &policyHandle->label, "info",&policyHandle->info, "version",&policyHandle->version);
if (err) {
AFB_ERROR ("POLICY-LOAD-CONFIG Missing something label|info|version in %s", json_object_get_string(metadataJ));
goto OnErrorExit;
}
if (onloadJ) {
err= wrap_json_unpack(onloadJ, "{s?o,s?s,s?s !}", "info",&ignoreJ, "label",&ignoreJ, "actions",&actionsJ);
if (err) {
AFB_ERROR ("POLICY-LOAD-CONFIG Missing something label|info|plugin|actions in %s", json_object_get_string(metadataJ));
goto OnErrorExit;
}
policyConfig->onload = PolicyLoadActions (actionsJ);
}
return policyControl;
OnErrorExit:
return NULL;
}
// Load default config file at init
PUBLIC int PolicyInit () {
int index, err;
// search for default policy config file
json_object* responseJ = ScanForConfig(CONTROL_CONFIG_PATH);
for (index=0; index < json_object_array_length(responseJ); index++) {
json_object *entryJ=json_object_array_get_idx(responseJ, index);
char *filename; char*dirpath;
err= wrap_json_unpack (entryJ, "{s:s, s:s !}", "dirpath", &dirpath,"filename", &filename);
if (err) {
AFB_ERROR ("POLICY-INIT HOOPs invalid config file path = %s", json_object_get_string(entryJ));
goto OnErrorExit;
}
if (strcasestr(filename, CONTROL_CONFIG_FILE)) {
char filepath[255];
strncpy(filepath, dirpath, sizeof(filepath));
strncat(filepath, "/", sizeof(filepath));
strncat(filepath, filename, sizeof(filepath));
ctlHandle = PolicyLoadConfig (filepath);
if (!ctlHandle) goto OnErrorExit;
break;
}
}
// no policy config found remove control API from binder
if (index == 0) goto OnErrorExit;
AFB_NOTICE ("SUCCES: Audio Control Policy Init");
return 0;
OnErrorExit:
AFB_NOTICE ("ERROR: Audio Control Policy Init");
return 1;
}
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