Ram Gandikota
A metronome using the FRDM K64F board
Diff: mbed-client/source/m2mtlvdeserializer.cpp
- Revision:
- 0:a7a43371b306
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/source/m2mtlvdeserializer.cpp Sun May 14 18:40:18 2017 +0000
@@ -0,0 +1,430 @@
+/*
+ * Copyright (c) 2015 ARM Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ * 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.
+ */
+#include "include/m2mtlvdeserializer.h"
+#include "mbed-client/m2mconstants.h"
+#include "include/nsdllinker.h"
+#include "mbed-trace/mbed_trace.h"
+
+#define TRACE_GROUP "mClt"
+#define BUFFER_SIZE 10
+
+M2MTLVDeserializer::M2MTLVDeserializer()
+{
+}
+
+M2MTLVDeserializer::~M2MTLVDeserializer()
+{
+}
+
+bool M2MTLVDeserializer::is_object_instance(uint8_t *tlv)
+{
+ return is_object_instance(tlv, 0);
+}
+
+bool M2MTLVDeserializer::is_resource(uint8_t *tlv)
+{
+ return is_resource(tlv, 0);
+}
+
+bool M2MTLVDeserializer::is_multiple_resource(uint8_t *tlv)
+{
+ return is_multiple_resource(tlv, 0);
+}
+
+bool M2MTLVDeserializer::is_resource_instance(uint8_t *tlv)
+{
+ return is_resource_instance(tlv, 0);
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialise_object_instances(uint8_t* tlv,
+ uint32_t tlv_size,
+ M2MObject &object,
+ M2MTLVDeserializer::Operation operation)
+{
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ if (is_object_instance(tlv) ) {
+ tr_debug("M2MTLVDeserializer::deserialise_object_instances");
+ error = deserialize_object_instances(tlv, tlv_size, 0, object,operation,false);
+ if(M2MTLVDeserializer::None == error) {
+ error = deserialize_object_instances(tlv, tlv_size, 0, object,operation,true);
+ }
+ } else {
+ tr_debug("M2MTLVDeserializer::deserialise_object_instances ::NotValid");
+ error = M2MTLVDeserializer::NotValid;
+ }
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_resources(uint8_t *tlv,
+ uint32_t tlv_size,
+ M2MObjectInstance &object_instance,
+ M2MTLVDeserializer::Operation operation)
+{
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ if (!is_resource(tlv) && !is_multiple_resource(tlv)) {
+ error = M2MTLVDeserializer::NotValid;
+ } else {
+ error = deserialize_resources(tlv, tlv_size, 0, object_instance, operation,false);
+ if(M2MTLVDeserializer::None == error) {
+ error = deserialize_resources(tlv, tlv_size, 0, object_instance, operation,true);
+ }
+ }
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_resource_instances(uint8_t *tlv,
+ uint32_t tlv_size,
+ M2MResource &resource,
+ M2MTLVDeserializer::Operation operation)
+{
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ if (!is_multiple_resource(tlv)) {
+ error = M2MTLVDeserializer::NotValid;
+ } else {
+ tr_debug("M2MTLVDeserializer::deserialize_resource_instances()");
+ uint8_t offset = 2;
+
+ ((tlv[0] & 0x20) == 0) ? offset : offset++;
+
+ uint8_t length = tlv[0] & 0x18;
+ if(length == 0x08) {
+ offset+= 1;
+ } else if(length == 0x10) {
+ offset+= 2;
+ } else if(length == 0x18) {
+ offset+= 3;
+ }
+
+ tr_debug("M2MTLVDeserializer::deserialize_resource_instances() Offset %d", offset);
+ error = deserialize_resource_instances(tlv, tlv_size, offset, resource, operation,false);
+ if(M2MTLVDeserializer::None == error) {
+ error = deserialize_resource_instances(tlv, tlv_size, offset, resource, operation,true);
+ }
+ }
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_object_instances(uint8_t *tlv,
+ uint32_t tlv_size,
+ uint32_t offset,
+ M2MObject &object,
+ M2MTLVDeserializer::Operation operation,
+ bool update_value)
+{
+ tr_debug("M2MTLVDeserializer::deserialize_object_instances()");
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ TypeIdLength *til = TypeIdLength::createTypeIdLength(tlv, offset)->deserialize();
+ offset = til->_offset;
+
+ M2MObjectInstanceList list = object.instances();
+ M2MObjectInstanceList::const_iterator it;
+ it = list.begin();
+
+ if (TYPE_OBJECT_INSTANCE == til->_type) {
+ for (; it!=list.end(); it++) {
+ if((*it)->instance_id() == til->_id) {
+ error = deserialize_resources(tlv, tlv_size, offset, (**it),operation, update_value);
+ }
+ }
+ offset += til->_length;
+
+ if(offset < tlv_size) {
+ error = deserialize_object_instances(tlv, tlv_size, offset, object, operation, update_value);
+ }
+ }
+ delete til;
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_resources(uint8_t *tlv,
+ uint32_t tlv_size,
+ uint32_t offset,
+ M2MObjectInstance &object_instance,
+ M2MTLVDeserializer::Operation operation,
+ bool update_value)
+{
+ tr_debug("M2MTLVDeserializer::deserialize_resources()");
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ TypeIdLength *til = TypeIdLength::createTypeIdLength(tlv, offset)->deserialize();
+ offset = til->_offset;
+
+ M2MResourceList list = object_instance.resources();
+ M2MResourceList::const_iterator it;
+ it = list.begin();
+
+ if (TYPE_RESOURCE == til->_type || TYPE_RESOURCE_INSTANCE == til->_type) {
+ bool found = false;
+ for (; it!=list.end(); it++) {
+ if((*it)->name_id() == til->_id){
+ tr_debug("M2MTLVDeserializer::deserialize_resources() - Resource ID %d ", til->_id);
+ found = true;
+ if(update_value) {
+ if(til->_length > 0) {
+ tr_debug("M2MTLVDeserializer::deserialize_resources() - Update value");
+ (*it)->set_value(tlv+offset, til->_length);
+ } else {
+ tr_debug("M2MTLVDeserializer::deserialize_resources() - Clear Value");
+ (*it)->clear_value();
+ }
+ break;
+ } else if(0 == ((*it)->operation() & SN_GRS_PUT_ALLOWED)) {
+ tr_debug("M2MTLVDeserializer::deserialize_resources() - NOT_ALLOWED");
+ error = M2MTLVDeserializer::NotAllowed;
+ break;
+ }
+ }
+ }
+ if(!found) {
+ if(M2MTLVDeserializer::Post == operation) {
+ //Create a new Resource
+ String id;
+ id.append_int(til->_id);
+ M2MResource *resource = object_instance.create_dynamic_resource(id,"",M2MResourceInstance::INTEGER,true,false);
+ if(resource) {
+ resource->set_operation(M2MBase::GET_PUT_POST_DELETE_ALLOWED);
+ }
+ } else if(M2MTLVDeserializer::Put == operation) {
+ error = M2MTLVDeserializer::NotFound;
+ }
+ }
+ } else if (TYPE_MULTIPLE_RESOURCE == til->_type) {
+ for (; it!=list.end(); it++) {
+ if((*it)->supports_multiple_instances()) {
+ error = deserialize_resource_instances(tlv, tlv_size-offset, offset, (**it), object_instance, operation, update_value);
+ }
+ }
+
+ } else {
+ delete til;
+ error = M2MTLVDeserializer::NotValid;
+ return error;
+ }
+ offset += til->_length;
+
+ delete til;
+ if(offset < tlv_size) {
+ error = deserialize_resources(tlv, tlv_size, offset, object_instance, operation, update_value);
+ }
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_resource_instances(uint8_t *tlv,
+ uint32_t tlv_size,
+ uint32_t offset,
+ M2MResource &resource,
+ M2MObjectInstance &object_instance,
+ M2MTLVDeserializer::Operation operation,
+ bool update_value)
+{
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ TypeIdLength *til = TypeIdLength::createTypeIdLength(tlv, offset)->deserialize();
+ offset = til->_offset;
+
+ if (TYPE_MULTIPLE_RESOURCE == til->_type || TYPE_RESOURCE_INSTANCE == til->_type) {
+ M2MResourceInstanceList list = resource.resource_instances();
+ M2MResourceInstanceList::const_iterator it;
+ it = list.begin();
+ bool found = false;
+ for (; it!=list.end(); it++) {
+ if((*it)->instance_id() == til->_id) {
+ found = true;
+ if(update_value) {
+ if(til->_length > 0) {
+ (*it)->set_value(tlv+offset, til->_length);
+ } else {
+ (*it)->clear_value();
+ }
+ break;
+ } else if(0 == ((*it)->operation() & SN_GRS_PUT_ALLOWED)) {
+ error = M2MTLVDeserializer::NotAllowed;
+ break;
+ }
+ }
+ }
+ if(!found) {
+ if(M2MTLVDeserializer::Post == operation) {
+ // Create a new Resource Instance
+ M2MResourceInstance *res_instance = object_instance.create_dynamic_resource_instance(resource.name(),"",
+ M2MResourceInstance::INTEGER,
+ true,
+ til->_id);
+ if(res_instance) {
+ res_instance->set_operation(M2MBase::GET_PUT_POST_DELETE_ALLOWED);
+ }
+ } else if(M2MTLVDeserializer::Put == operation) {
+ error = M2MTLVDeserializer::NotFound;
+ }
+ }
+ } else {
+ delete til;
+ error = M2MTLVDeserializer::NotValid;
+ return error;
+ }
+
+ offset += til->_length;
+
+ delete til;
+ if(offset < tlv_size) {
+ error = deserialize_resource_instances(tlv, tlv_size-offset, offset, resource, object_instance, operation, update_value);
+ }
+ return error;
+}
+
+M2MTLVDeserializer::Error M2MTLVDeserializer::deserialize_resource_instances(uint8_t *tlv,
+ uint32_t tlv_size,
+ uint32_t offset,
+ M2MResource &resource,
+ M2MTLVDeserializer::Operation operation,
+ bool update_value)
+{
+ M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+ TypeIdLength *til = TypeIdLength::createTypeIdLength(tlv, offset)->deserialize();
+ offset = til->_offset;
+
+ if (TYPE_RESOURCE_INSTANCE == til->_type) {
+ M2MResourceInstanceList list = resource.resource_instances();
+ M2MResourceInstanceList::const_iterator it;
+ it = list.begin();
+ bool found = false;
+ for (; it!=list.end(); it++) {
+ if((*it)->instance_id() == til->_id) {
+ found = true;
+ if(update_value) {
+ if(til->_length > 0) {
+ (*it)->set_value(tlv+offset, til->_length);
+ } else {
+ (*it)->clear_value();
+ }
+ break;
+ } else if(0 == ((*it)->operation() & SN_GRS_PUT_ALLOWED)) {
+ error = M2MTLVDeserializer::NotAllowed;
+ break;
+ }
+ }
+ }
+ if(!found) {
+ if(M2MTLVDeserializer::Post == operation) {
+ error = M2MTLVDeserializer::NotAllowed;
+ } else if(M2MTLVDeserializer::Put == operation) {
+ error = M2MTLVDeserializer::NotFound;
+ }
+ }
+ } else {
+ delete til;
+ error = M2MTLVDeserializer::NotValid;
+ return error;
+ }
+
+ offset += til->_length;
+
+ delete til;
+ if(offset < tlv_size) {
+ error = deserialize_resource_instances(tlv, tlv_size-offset, offset, resource, operation, update_value);
+ }
+ return error;
+}
+
+bool M2MTLVDeserializer::is_object_instance(uint8_t *tlv, uint32_t offset)
+{
+ bool ret = false;
+ if (tlv) {
+ uint8_t value = tlv[offset];
+ ret = (TYPE_OBJECT_INSTANCE == (value & TYPE_RESOURCE));
+ }
+ return ret;
+}
+
+uint16_t M2MTLVDeserializer::instance_id(uint8_t *tlv)
+{
+ TypeIdLength *til = TypeIdLength::createTypeIdLength(tlv, 0)->deserialize();
+ uint16_t id = til->_id;
+ delete til;
+ return id;
+}
+
+bool M2MTLVDeserializer::is_resource(uint8_t *tlv, uint32_t offset)
+{
+ bool ret = false;
+ if (tlv) {
+ ret = (TYPE_RESOURCE == (tlv[offset] & TYPE_RESOURCE));
+ }
+ return ret;
+}
+
+bool M2MTLVDeserializer::is_multiple_resource(uint8_t *tlv, uint32_t offset)
+{
+ bool ret = false;
+ if (tlv) {
+ ret = (TYPE_MULTIPLE_RESOURCE == (tlv[offset] & TYPE_RESOURCE));
+ }
+ return ret;
+}
+
+bool M2MTLVDeserializer::is_resource_instance(uint8_t *tlv, uint32_t offset)
+{
+ bool ret = false;
+ if (tlv) {
+ ret = (TYPE_RESOURCE_INSTANCE == (tlv[offset] & TYPE_RESOURCE));
+ }
+ return ret;
+}
+
+TypeIdLength* TypeIdLength::createTypeIdLength(uint8_t *tlv, uint32_t offset)
+{
+ TypeIdLength *til = new TypeIdLength();
+ til->_tlv = tlv;
+ til->_offset = offset;
+ til->_type = tlv[offset] & 0xC0;
+ til->_id = 0;
+ til->_length = 0;
+ return til;
+}
+
+TypeIdLength* TypeIdLength::deserialize()
+{
+ uint32_t idLength = _tlv[_offset] & ID16;
+ uint32_t lengthType = _tlv[_offset] & LENGTH24;
+ if (0 == lengthType) {
+ _length = _tlv[_offset] & 0x07;
+ }
+ _offset++;
+
+ deserialiseID(idLength);
+ deserialiseLength(lengthType);
+
+ return this;
+}
+
+void TypeIdLength::deserialiseID(uint32_t idLength)
+{
+ _id = _tlv[_offset++] & 0xFF;
+ if (ID16 == idLength) {
+ _id = (_id << 8) + (_tlv[_offset++] & 0xFF);
+ }
+}
+
+void TypeIdLength::deserialiseLength(uint32_t lengthType)
+{
+ if (lengthType > 0) {
+ _length = _tlv[_offset++] & 0xFF;
+ }
+ if (lengthType > LENGTH8) {
+ _length = (_length << 8) + (_tlv[_offset++] & 0xFF);
+ }
+ if (lengthType > LENGTH16) {
+ _length = (_length << 8) + (_tlv[_offset++] & 0xFF);
+ }
+}