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-rw-r--r--afb-source/ctl-policy.c221
1 files changed, 221 insertions, 0 deletions
diff --git a/afb-source/ctl-policy.c b/afb-source/ctl-policy.c
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+++ b/afb-source/ctl-policy.c
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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;
+}
+
+
+