mirror of https://github.com/ARMmbed/mbed-os.git
238 lines
7.3 KiB
C++
238 lines
7.3 KiB
C++
/*
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* Copyright (c) 2015 ARM Limited. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdio.h>
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#include "include/m2mtlvserializer.h"
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#include "include/nsdllinker.h"
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#include "mbed-client/m2mconstants.h"
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#define TRACE_GROUP "mClt"
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M2MTLVSerializer::M2MTLVSerializer()
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{
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}
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M2MTLVSerializer::~M2MTLVSerializer()
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{
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}
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uint8_t* M2MTLVSerializer::serialize(M2MObjectInstanceList object_instance_list, uint32_t &size)
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{
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return serialize_object_instances(object_instance_list, size);
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}
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uint8_t* M2MTLVSerializer::serialize(M2MResourceList resource_list, uint32_t &size)
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{
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bool valid = true;
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return serialize_resources(resource_list, size,valid);
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}
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uint8_t* M2MTLVSerializer::serialize(M2MResource *resource, uint32_t &size)
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{
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uint8_t* data = NULL;
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serialize(resource, data, size);
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return data;
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}
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uint8_t* M2MTLVSerializer::serialize_object_instances(M2MObjectInstanceList object_instance_list, uint32_t &size)
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{
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uint8_t *data = NULL;
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if(!object_instance_list.empty()) {
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M2MObjectInstanceList::const_iterator it;
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it = object_instance_list.begin();
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for (; it!=object_instance_list.end(); it++) {
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uint16_t id = (*it)->instance_id();
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serialize(id, *it, data, size);
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}
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}
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return data;
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}
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uint8_t* M2MTLVSerializer::serialize_resources(M2MResourceList resource_list, uint32_t &size, bool &valid)
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{
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uint8_t *data = NULL;
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if(!resource_list.empty()) {
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M2MResourceList::const_iterator it;
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it = resource_list.begin();
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for (; it!=resource_list.end(); it++) {
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if((*it)->name_id() == -1) {
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valid = false;
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break;
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}
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}
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if(valid) {
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it = resource_list.begin();
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for (; it!=resource_list.end(); it++) {
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serialize(*it, data, size);
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}
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}
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}
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return data;
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}
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void M2MTLVSerializer::serialize(uint16_t id, M2MObjectInstance *object_instance, uint8_t *&data, uint32_t &size)
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{
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uint8_t *resource_data = NULL;
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uint32_t resource_size = 0;
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bool valid = true;
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resource_data = serialize_resources(object_instance->resources(),resource_size,valid);
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if(valid) {
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serialize_TILV(TYPE_OBJECT_INSTANCE, id, resource_data, resource_size, data, size);
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}
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free(resource_data);
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}
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bool M2MTLVSerializer::serialize(M2MResource *resource, uint8_t *&data, uint32_t &size)
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{
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bool success = false;
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if(resource->name_id() != -1) {
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success = resource->supports_multiple_instances() ?
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serialize_multiple_resource(resource, data, size) :
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serialize_resource(resource, data, size);
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}
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return success;
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}
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bool M2MTLVSerializer::serialize_resource(M2MResource *resource, uint8_t *&data, uint32_t &size)
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{
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bool success = false;
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if(resource->name_id() != -1) {
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success = true;
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serialize_TILV(TYPE_RESOURCE, resource->name_id(), resource->value(), resource->value_length(), data, size);
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}
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return success;
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}
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bool M2MTLVSerializer::serialize_multiple_resource(M2MResource *resource, uint8_t *&data, uint32_t &size)
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{
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bool success = false;
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uint8_t *nested_data = NULL;
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uint32_t nested_data_size = 0;
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M2MResourceInstanceList instance_list = resource->resource_instances();
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if(!instance_list.empty()) {
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M2MResourceInstanceList::const_iterator it;
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it = instance_list.begin();
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for (; it!=instance_list.end(); it++) {
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uint16_t id = (*it)->instance_id();
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serialize_resource_instance(id, (*it), nested_data, nested_data_size);
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}
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}
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if(resource->name_id() != -1) {
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success = true;
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serialize_TILV(TYPE_MULTIPLE_RESOURCE, resource->name_id(), nested_data, nested_data_size, data, size);
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}
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free(nested_data);
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nested_data = NULL;
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return success;
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}
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void M2MTLVSerializer::serialize_resource_instance(uint16_t id, M2MResourceInstance *resource, uint8_t *&data, uint32_t &size)
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{
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serialize_TILV(TYPE_RESOURCE_INSTANCE, id, resource->value(), resource->value_length(), data, size);
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}
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void M2MTLVSerializer::serialize_TILV(uint8_t type, uint16_t id, uint8_t *value, uint32_t value_length, uint8_t *&data, uint32_t &size)
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{
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uint8_t *tlv = 0;
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uint32_t type_length = 1;
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type += id < 256 ? 0 : ID16;
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type += value_length < 8 ? value_length :
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value_length < 256 ? LENGTH8 :
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value_length < 65536 ? LENGTH16 : LENGTH24;
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uint8_t *tlv_type = (uint8_t*)malloc(type_length+1);
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memset(tlv_type,0,type_length+1);
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*tlv_type = type & 0xFF;
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uint32_t id_size = 0;
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uint8_t* id_ptr = serialize_id(id, id_size);
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uint32_t length_size = 0;
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uint8_t* length_ptr = serialize_length(value_length, length_size);
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tlv = (uint8_t*)malloc(size + type_length + id_size + length_size + value_length+1);
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memset(tlv,0,size + type_length + id_size + length_size + value_length+1);
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if(data) {
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memcpy(tlv, data, size);
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}
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memcpy(tlv+size, tlv_type, type_length);
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memcpy(tlv+size+type_length, id_ptr, id_size);
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memcpy(tlv+size+type_length+id_size, length_ptr, length_size);
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memcpy(tlv+size+type_length+id_size+length_size, value, value_length);
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free(tlv_type) ;
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free(length_ptr);
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free(id_ptr);
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free(data);
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data = tlv;
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size += type_length + id_size + length_size + value_length;
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}
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uint8_t* M2MTLVSerializer::serialize_id(uint16_t id, uint32_t &size)
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{
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uint32_t id_size = id > 255 ? 2 : 1;
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uint8_t *id_ptr = (uint8_t*)malloc(id_size);
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memset(id_ptr, 0 , id_size);
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size += id_size;
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if(id > 255) {
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*id_ptr = (id & 0xFF00) >> 8;
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id_ptr++;
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*id_ptr = id & 0xFF;
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id_ptr--;
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} else {
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*id_ptr = id & 0xFF;
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}
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return id_ptr;
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}
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uint8_t* M2MTLVSerializer::serialize_length(uint32_t length, uint32_t &size)
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{
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uint8_t *length_ptr = 0;
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uint32_t length_size = 0;
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if (length > 65535) {
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length_size = 3;
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length_ptr = (uint8_t*)malloc(length_size+1);
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memset(length_ptr,0,length_size+1);
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*length_ptr = (length & 0xFF0000) >> 16;
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length_ptr++;
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*length_ptr = (length & 0xFF00) >> 8;
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length_ptr++;
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*length_ptr = length & 0xFF;
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length_ptr--;
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length_ptr--;
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} else if (length > 255) {
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length_size = 2;
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length_ptr = (uint8_t*)malloc(length_size+1);
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memset(length_ptr,0,length_size+1);
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*length_ptr = (length & 0xFF00) >> 8;
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length_ptr++;
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*length_ptr = length & 0xFF;
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length_ptr--;
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} else if (length > 7) {
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length_size = 1;
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length_ptr = (uint8_t*)malloc(length_size+1);
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memset(length_ptr,0,length_size+1);
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*length_ptr = length & 0xFF;
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}
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size += length_size;
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return length_ptr;
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}
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