Toyomasa Watarai / simple-mbed-cloud-client

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mbed-cloud-client/mbed-client/source/include/m2mtlvdeserializer.h@0:276e7a263c35, 2018-07-02 (annotated)

Committer:
MACRUM
Date:
Mon Jul 02 06:30:39 2018 +0000
Revision:
0:276e7a263c35
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:276e7a263c35 1 /*
MACRUM 0:276e7a263c35 2 * Copyright (c) 2015 ARM Limited. All rights reserved.
MACRUM 0:276e7a263c35 3 * SPDX-License-Identifier: Apache-2.0
MACRUM 0:276e7a263c35 4 * Licensed under the Apache License, Version 2.0 (the License); you may
MACRUM 0:276e7a263c35 5 * not use this file except in compliance with the License.
MACRUM 0:276e7a263c35 6 * You may obtain a copy of the License at
MACRUM 0:276e7a263c35 7 *
MACRUM 0:276e7a263c35 8 * http://www.apache.org/licenses/LICENSE-2.0
MACRUM 0:276e7a263c35 9 *
MACRUM 0:276e7a263c35 10 * Unless required by applicable law or agreed to in writing, software
MACRUM 0:276e7a263c35 11 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
MACRUM 0:276e7a263c35 12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MACRUM 0:276e7a263c35 13 * See the License for the specific language governing permissions and
MACRUM 0:276e7a263c35 14 * limitations under the License.
MACRUM 0:276e7a263c35 15 */
MACRUM 0:276e7a263c35 16 #include "mbed-client/m2mvector.h"
MACRUM 0:276e7a263c35 17 #include "mbed-client/m2mobject.h"
MACRUM 0:276e7a263c35 18 #include "mbed-client/m2mobjectinstance.h"
MACRUM 0:276e7a263c35 19 #include "mbed-client/m2mresource.h"
MACRUM 0:276e7a263c35 20
MACRUM 0:276e7a263c35 21 /**
MACRUM 0:276e7a263c35 22 * @brief M2MTLVDeserializer
MACRUM 0:276e7a263c35 23 * TLV Deserialiser get the object instances and resources as binary data and
MACRUM 0:276e7a263c35 24 * builds the <code>lwm2m</code> representation from it. See OMA-LWM2M
MACRUM 0:276e7a263c35 25 * specification, chapter 6.1 for the resource model and chapter 6.3.3 for
MACRUM 0:276e7a263c35 26 * the OMA-TLV specification.
MACRUM 0:276e7a263c35 27 */
MACRUM 0:276e7a263c35 28 class M2MTLVDeserializer {
MACRUM 0:276e7a263c35 29
MACRUM 0:276e7a263c35 30 public :
MACRUM 0:276e7a263c35 31
MACRUM 0:276e7a263c35 32 typedef enum {
MACRUM 0:276e7a263c35 33 None,
MACRUM 0:276e7a263c35 34 NotFound,
MACRUM 0:276e7a263c35 35 NotAllowed,
MACRUM 0:276e7a263c35 36 NotValid,
MACRUM 0:276e7a263c35 37 OutOfMemory
MACRUM 0:276e7a263c35 38 } Error;
MACRUM 0:276e7a263c35 39
MACRUM 0:276e7a263c35 40 typedef enum {
MACRUM 0:276e7a263c35 41 Put,
MACRUM 0:276e7a263c35 42 Post
MACRUM 0:276e7a263c35 43 } Operation;
MACRUM 0:276e7a263c35 44
MACRUM 0:276e7a263c35 45
MACRUM 0:276e7a263c35 46 /**
MACRUM 0:276e7a263c35 47 * This method checks whether the given binary encodes an object instance
MACRUM 0:276e7a263c35 48 * or something else. It returns <code>true</code> if bits 7-6 of the first
MACRUM 0:276e7a263c35 49 * byte is "00".
MACRUM 0:276e7a263c35 50 * @param tlv Binary to be checked as LWM2M object instance
MACRUM 0:276e7a263c35 51 * @return <code>true</code> or <code>false</code>.
MACRUM 0:276e7a263c35 52 */
MACRUM 0:276e7a263c35 53 static bool is_object_instance(const uint8_t *tlv);
MACRUM 0:276e7a263c35 54
MACRUM 0:276e7a263c35 55 /**
MACRUM 0:276e7a263c35 56 * This method checks whether the given binary encodes a resource or
MACRUM 0:276e7a263c35 57 * something else. It returns <code>true</code> if bits 7-6 of the first
MACRUM 0:276e7a263c35 58 * byte is "11".
MACRUM 0:276e7a263c35 59 * @param tlv Binary to be checked as LWM2M resource.
MACRUM 0:276e7a263c35 60 * @return <code>true</code> or <code>false</code>.
MACRUM 0:276e7a263c35 61 */
MACRUM 0:276e7a263c35 62 static bool is_resource(const uint8_t *tlv);
MACRUM 0:276e7a263c35 63
MACRUM 0:276e7a263c35 64 /**
MACRUM 0:276e7a263c35 65 * This method checks whether the given binary encodes a multiple resource
MACRUM 0:276e7a263c35 66 * or something else. It returns <code>true</code> if bits 7-6 of the first
MACRUM 0:276e7a263c35 67 * byte is "10".
MACRUM 0:276e7a263c35 68 * @param tlv Binary to be checked as LWM2M multiple resource.
MACRUM 0:276e7a263c35 69 * @return <code>true</code> or <code>false</code>.
MACRUM 0:276e7a263c35 70 */
MACRUM 0:276e7a263c35 71 static bool is_multiple_resource(const uint8_t *tlv);
MACRUM 0:276e7a263c35 72
MACRUM 0:276e7a263c35 73 /**
MACRUM 0:276e7a263c35 74 * This method checks whether the given binary encodes a resource instance
MACRUM 0:276e7a263c35 75 * or something else. It returns <code>true</code> if bits 7-6 of the first
MACRUM 0:276e7a263c35 76 * byte is "01".
MACRUM 0:276e7a263c35 77 * @param tlv Binary to be checked as LWM2M resource instance.
MACRUM 0:276e7a263c35 78 * @return <code>true</code> or <code>false</code>.
MACRUM 0:276e7a263c35 79 */
MACRUM 0:276e7a263c35 80 static bool is_resource_instance(const uint8_t *tlv);
MACRUM 0:276e7a263c35 81
MACRUM 0:276e7a263c35 82 /**
MACRUM 0:276e7a263c35 83 * Deserialises the given binary that must encode object instances. Binary
MACRUM 0:276e7a263c35 84 * array can be checked before invoking this method with
MACRUM 0:276e7a263c35 85 */
MACRUM 0:276e7a263c35 86 static M2MTLVDeserializer::Error deserialise_object_instances(const uint8_t* tlv,
MACRUM 0:276e7a263c35 87 uint32_t tlv_size,
MACRUM 0:276e7a263c35 88 M2MObject &object,
MACRUM 0:276e7a263c35 89 M2MTLVDeserializer::Operation operation);
MACRUM 0:276e7a263c35 90
MACRUM 0:276e7a263c35 91 /**
MACRUM 0:276e7a263c35 92 * Deserialises the given binary that must encode resources. Binary array
MACRUM 0:276e7a263c35 93 * can be checked before invoking this method.
MACRUM 0:276e7a263c35 94 */
MACRUM 0:276e7a263c35 95 static M2MTLVDeserializer::Error deserialize_resources(const uint8_t *tlv,
MACRUM 0:276e7a263c35 96 uint32_t tlv_size,
MACRUM 0:276e7a263c35 97 M2MObjectInstance &object_instance,
MACRUM 0:276e7a263c35 98 M2MTLVDeserializer::Operation operation);
MACRUM 0:276e7a263c35 99
MACRUM 0:276e7a263c35 100 /**
MACRUM 0:276e7a263c35 101 * Deserialises the given binary that must encode resource instances. Binary array
MACRUM 0:276e7a263c35 102 * can be checked before invoking this method.
MACRUM 0:276e7a263c35 103 */
MACRUM 0:276e7a263c35 104 static M2MTLVDeserializer::Error deserialize_resource_instances(const uint8_t *tlv,
MACRUM 0:276e7a263c35 105 uint32_t tlv_size,
MACRUM 0:276e7a263c35 106 M2MResource &resource,
MACRUM 0:276e7a263c35 107 M2MTLVDeserializer::Operation operation);
MACRUM 0:276e7a263c35 108 /**
MACRUM 0:276e7a263c35 109 * This method return object instance id or resource id.
MACRUM 0:276e7a263c35 110 * @param tlv Binary to be checked
MACRUM 0:276e7a263c35 111 * @return Object instance id or resource id.
MACRUM 0:276e7a263c35 112 */
MACRUM 0:276e7a263c35 113 static uint16_t instance_id(const uint8_t *tlv);
MACRUM 0:276e7a263c35 114
MACRUM 0:276e7a263c35 115 private:
MACRUM 0:276e7a263c35 116
MACRUM 0:276e7a263c35 117 static M2MTLVDeserializer::Error deserialize_object_instances(const uint8_t *tlv,
MACRUM 0:276e7a263c35 118 uint32_t tlv_size,
MACRUM 0:276e7a263c35 119 uint32_t offset,
MACRUM 0:276e7a263c35 120 M2MObject &object,
MACRUM 0:276e7a263c35 121 M2MTLVDeserializer::Operation operation,
MACRUM 0:276e7a263c35 122 bool update_value);
MACRUM 0:276e7a263c35 123
MACRUM 0:276e7a263c35 124 static M2MTLVDeserializer::Error deserialize_resources(const uint8_t *tlv,
MACRUM 0:276e7a263c35 125 uint32_t tlv_size,
MACRUM 0:276e7a263c35 126 uint32_t offset,
MACRUM 0:276e7a263c35 127 M2MObjectInstance &object_instance,
MACRUM 0:276e7a263c35 128 M2MTLVDeserializer::Operation operation,
MACRUM 0:276e7a263c35 129 bool update_value);
MACRUM 0:276e7a263c35 130
MACRUM 0:276e7a263c35 131 static M2MTLVDeserializer::Error deserialize_resource_instances(const uint8_t *tlv,
MACRUM 0:276e7a263c35 132 uint32_t tlv_size,
MACRUM 0:276e7a263c35 133 uint32_t offset,
MACRUM 0:276e7a263c35 134 M2MResource &resource,
MACRUM 0:276e7a263c35 135 M2MObjectInstance &object_instance,
MACRUM 0:276e7a263c35 136 M2MTLVDeserializer::Operation operation,
MACRUM 0:276e7a263c35 137 bool update_value);
MACRUM 0:276e7a263c35 138
MACRUM 0:276e7a263c35 139 static M2MTLVDeserializer::Error deserialize_resource_instances(const uint8_t *tlv,
MACRUM 0:276e7a263c35 140 uint32_t tlv_size,
MACRUM 0:276e7a263c35 141 uint32_t offset,
MACRUM 0:276e7a263c35 142 M2MResource &resource,
MACRUM 0:276e7a263c35 143 M2MTLVDeserializer::Operation operation,
MACRUM 0:276e7a263c35 144 bool update_value);
MACRUM 0:276e7a263c35 145
MACRUM 0:276e7a263c35 146 static bool is_object_instance(const uint8_t *tlv, uint32_t offset);
MACRUM 0:276e7a263c35 147
MACRUM 0:276e7a263c35 148 static bool is_resource(const uint8_t *tlv, uint32_t offset);
MACRUM 0:276e7a263c35 149
MACRUM 0:276e7a263c35 150 static bool is_multiple_resource(const uint8_t *tlv, uint32_t offset);
MACRUM 0:276e7a263c35 151
MACRUM 0:276e7a263c35 152 static bool is_resource_instance(const uint8_t *tlv, uint32_t offset);
MACRUM 0:276e7a263c35 153
MACRUM 0:276e7a263c35 154 static bool set_resource_instance_value(M2MResourceBase *res, const uint8_t *tlv, const uint32_t size);
MACRUM 0:276e7a263c35 155
MACRUM 0:276e7a263c35 156 static void remove_resources(const uint8_t *tlv,
MACRUM 0:276e7a263c35 157 uint32_t tlv_size,
MACRUM 0:276e7a263c35 158 M2MObjectInstance &object_instance,
MACRUM 0:276e7a263c35 159 uint32_t offset_size);
MACRUM 0:276e7a263c35 160
MACRUM 0:276e7a263c35 161 static void remove_resource_instances(const uint8_t *tlv,
MACRUM 0:276e7a263c35 162 uint32_t tlv_size,
MACRUM 0:276e7a263c35 163 M2MResource &resource,
MACRUM 0:276e7a263c35 164 uint32_t offset_size);
MACRUM 0:276e7a263c35 165 };
MACRUM 0:276e7a263c35 166
MACRUM 0:276e7a263c35 167 class TypeIdLength {
MACRUM 0:276e7a263c35 168
MACRUM 0:276e7a263c35 169 public:
MACRUM 0:276e7a263c35 170 TypeIdLength(const uint8_t *tlv, uint32_t offset);
MACRUM 0:276e7a263c35 171
MACRUM 0:276e7a263c35 172 void deserialize();
MACRUM 0:276e7a263c35 173
MACRUM 0:276e7a263c35 174 void deserialiseID(uint32_t idLength);
MACRUM 0:276e7a263c35 175
MACRUM 0:276e7a263c35 176 void deserialiseLength(uint32_t lengthType);
MACRUM 0:276e7a263c35 177
MACRUM 0:276e7a263c35 178 const uint8_t *_tlv;
MACRUM 0:276e7a263c35 179 uint32_t _offset;
MACRUM 0:276e7a263c35 180 uint32_t _type;
MACRUM 0:276e7a263c35 181 uint16_t _id;
MACRUM 0:276e7a263c35 182 uint32_t _length;
MACRUM 0:276e7a263c35 183
MACRUM 0:276e7a263c35 184 friend class Test_M2MTLVDeserializer;
MACRUM 0:276e7a263c35 185 };