Example
Dependencies: FXAS21002 FXOS8700Q
simple-mbed-cloud-client/mbed-cloud-client/mbed-client/source/m2mtlvserializer.cpp
- Committer:
- maygup01
- Date:
- 2019-11-19
- Revision:
- 0:11cc2b7889af
File content as of revision 0:11cc2b7889af:
/* * 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/m2mtlvserializer.h" #include "mbed-client/m2mconstants.h" #include <stdlib.h> #include "common_functions.h" #define TRACE_GROUP "mClt" #define MAX_TLV_LENGTH_SIZE 3 #define MAX_TLV_ID_SIZE 2 #define TLV_TYPE_SIZE 1 uint8_t* M2MTLVSerializer::serialize(const M2MObjectInstanceList &object_instance_list, uint32_t &size) { return serialize_object_instances(object_instance_list, size); } uint8_t* M2MTLVSerializer::serialize(const M2MResourceList &resource_list, uint32_t &size) { bool valid = true; return serialize_resources(resource_list, size,valid); } uint8_t* M2MTLVSerializer::serialize(const M2MResource *resource, uint32_t &size) { uint8_t* data = NULL; serialize(resource, data, size); return data; } uint8_t* M2MTLVSerializer::serialize_object_instances(const M2MObjectInstanceList &object_instance_list, uint32_t &size) { uint8_t *data = NULL; if(!object_instance_list.empty()) { M2MObjectInstanceList::const_iterator it; it = object_instance_list.begin(); for (; it!=object_instance_list.end(); it++) { uint16_t id = (*it)->instance_id(); serialize(id, *it, data, size); } } return data; } uint8_t* M2MTLVSerializer::serialize_resources(const M2MResourceList &resource_list, uint32_t &size, bool &valid) { uint8_t *data = NULL; if(!resource_list.empty()) { M2MResourceList::const_iterator it; it = resource_list.begin(); for (; it!=resource_list.end(); it++) { if((*it)->name_id() == -1) { valid = false; break; } } if(valid) { it = resource_list.begin(); for (; it!=resource_list.end(); it++) { if (((*it)->operation() & M2MBase::GET_ALLOWED) == M2MBase::GET_ALLOWED) { if(!serialize(*it, data, size)) { /* serializing has failed */ /* free data so far */ free(data); /* invalidate */ valid = false; /* return NULL immediately */ return NULL; } } } } } return data; } bool M2MTLVSerializer::serialize(uint16_t id, const M2MObjectInstance *object_instance, uint8_t *&data, uint32_t &size) { uint8_t *resource_data = NULL; uint32_t resource_size = 0; bool success; bool valid = true; resource_data = serialize_resources(object_instance->resources(),resource_size,valid); if(valid) { if(serialize_TILV(TYPE_OBJECT_INSTANCE, id, resource_data, resource_size, data, size)) { success = true; } else { /* serializing object instance failed */ success = false; } free(resource_data); } else { /* serializing resources failed */ success = false; } return success; } bool M2MTLVSerializer::serialize(const M2MResource *resource, uint8_t *&data, uint32_t &size) { bool success = false; if(resource->name_id() != -1) { success = resource->supports_multiple_instances() ? serialize_multiple_resource(resource, data, size) : serialize_resource(resource, data, size); } return success; } bool M2MTLVSerializer::serialize_resource(const M2MResource *resource, uint8_t *&data, uint32_t &size) { bool success = false; if(resource->name_id() != -1) { if ( (resource->resource_instance_type() == M2MResourceBase::INTEGER) || (resource->resource_instance_type() == M2MResourceBase::BOOLEAN) || (resource->resource_instance_type() == M2MResourceBase::TIME) ) { success = serialize_TLV_binary_int(resource, TYPE_RESOURCE, resource->name_id(), data, size); } else if (resource->resource_instance_type() == M2MResourceBase::FLOAT) { success = serialize_TLV_binary_float(resource, TYPE_RESOURCE, resource->name_id(), data, size); } else { success = serialize_TILV(TYPE_RESOURCE, resource->name_id(), resource->value(), resource->value_length(), data, size); } } return success; } bool M2MTLVSerializer::serialize_multiple_resource(const M2MResource *resource, uint8_t *&data, uint32_t &size) { bool success = false; uint8_t *nested_data = NULL; uint32_t nested_data_size = 0; const M2MResourceInstanceList &instance_list = resource->resource_instances(); if(!instance_list.empty()) { M2MResourceInstanceList::const_iterator it; it = instance_list.begin(); for (; it!=instance_list.end(); it++) { uint16_t id = (*it)->instance_id(); if (((*it)->operation() & M2MBase::GET_ALLOWED) == M2MBase::GET_ALLOWED) { if(!serialize_resource_instance(id, (*it), nested_data, nested_data_size)) { /* serializing instance has failed */ /* free data so far allocated */ free(nested_data); /* return fail immediately*/ success = false; return success; } } } } if(resource->name_id() != -1 && (resource->operation() & M2MBase::GET_ALLOWED) == M2MBase::GET_ALLOWED) { success = serialize_TILV(TYPE_MULTIPLE_RESOURCE, resource->name_id(), nested_data, nested_data_size, data, size); } free(nested_data); return success; } bool M2MTLVSerializer::serialize_resource_instance(uint16_t id, const M2MResourceInstance *resource, uint8_t *&data, uint32_t &size) { bool success; if ( (resource->resource_instance_type() == M2MResourceBase::INTEGER) || (resource->resource_instance_type() == M2MResourceBase::BOOLEAN) || (resource->resource_instance_type() == M2MResourceBase::TIME) ) { success=serialize_TLV_binary_int(resource, TYPE_RESOURCE_INSTANCE, id, data, size); } else if (resource->resource_instance_type() == M2MResourceBase::FLOAT) { success=serialize_TLV_binary_float(resource, TYPE_RESOURCE_INSTANCE, id, data, size); } else { success=serialize_TILV(TYPE_RESOURCE_INSTANCE, id, resource->value(), resource->value_length(), data, size); } return success; } /* See, OMA-TS-LightweightM2M-V1_0-20170208-A, Appendix C, * Data Types, Integer, Boolean and Time TLV Format */ bool M2MTLVSerializer::serialize_TLV_binary_int(const M2MResourceBase *resource, uint8_t type, uint16_t id, uint8_t *&data, uint32_t &size) { int64_t valueInt = resource->get_value_int(); uint32_t buffer_size; /* max len 8 bytes */ uint8_t buffer[8]; if (resource->resource_instance_type() == M2MResourceBase::BOOLEAN) { buffer_size = 1; buffer[0] = valueInt; } else { buffer_size = 8; common_write_64_bit(valueInt, buffer); } return serialize_TILV(type, id, buffer, buffer_size, data, size); } /* See, OMA-TS-LightweightM2M-V1_0-20170208-A, Appendix C, * Data Type Float (32 bit only) TLV Format */ bool M2MTLVSerializer::serialize_TLV_binary_float(const M2MResourceBase *resource, uint8_t type, uint16_t id, uint8_t *&data, uint32_t &size) { float valueFloat = resource->get_value_float(); /* max len 8 bytes */ uint8_t buffer[4]; common_write_32_bit(*(uint32_t*)&valueFloat, buffer); return serialize_TILV(type, id, buffer, 4, data, size); } bool M2MTLVSerializer::serialize_TILV(uint8_t type, uint16_t id, uint8_t *value, uint32_t value_length, uint8_t *&data, uint32_t &size) { uint8_t *tlv = 0; const uint32_t type_length = TLV_TYPE_SIZE; type += id < 256 ? 0 : ID16; type += value_length < 8 ? value_length : value_length < 256 ? LENGTH8 : value_length < 65536 ? LENGTH16 : LENGTH24; uint8_t tlv_type; tlv_type = type & 0xFF; uint32_t id_size; uint8_t id_array[MAX_TLV_ID_SIZE]; serialize_id(id, id_size, id_array); uint32_t length_size; uint8_t length_array[MAX_TLV_LENGTH_SIZE]; serialize_length(value_length, length_size, length_array); tlv = (uint8_t*)malloc(size + type_length + id_size + length_size + value_length); if (!tlv) { /* memory allocation has failed */ /* return failure immediately */ return false; /* eventually NULL will be returned to serializer public method caller */ } if(data) { memcpy(tlv, data, size); free(data); } memcpy(tlv+size, &tlv_type, type_length); memcpy(tlv+size+type_length, id_array, id_size); memcpy(tlv+size+type_length+id_size, length_array, length_size); memcpy(tlv+size+type_length+id_size+length_size, value, value_length); data = tlv; size += type_length + id_size + length_size + value_length; return true; } void M2MTLVSerializer::serialize_id(uint16_t id, uint32_t &size, uint8_t *id_ptr) { if(id > 255) { size=2; id_ptr[0] = (id & 0xFF00) >> 8; id_ptr[1] = id & 0xFF; } else { size=1; id_ptr[0] = id & 0xFF; } } void M2MTLVSerializer::serialize_length(uint32_t length, uint32_t &size, uint8_t *length_ptr) { if (length > 65535) { size = 3; length_ptr[0] = (length & 0xFF0000) >> 16; length_ptr[1] = (length & 0xFF00) >> 8; length_ptr[2] = length & 0xFF; } else if (length > 255) { size = 2; length_ptr[0] = (length & 0xFF00) >> 8; length_ptr[1] = length & 0xFF; } else if (length > 7) { size = 1; length_ptr[0] = length & 0xFF; } else { size=0; } }