Diff: mbed-client/source/m2mtlvserializer.cpp

Revision:

0:a7a43371b306

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/source/m2mtlvserializer.cpp	Sun May 14 18:40:18 2017 +0000
@@ -0,0 +1,238 @@
+/*
+ * 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 "include/nsdllinker.h"
+#include "mbed-client/m2mconstants.h"
+
+#include <stdlib.h>
+
+#define TRACE_GROUP "mClt"
+
+M2MTLVSerializer::M2MTLVSerializer()
+{
+}
+
+M2MTLVSerializer::~M2MTLVSerializer()
+{
+}
+
+uint8_t* M2MTLVSerializer::serialize(M2MObjectInstanceList object_instance_list, uint32_t &size)
+{
+    return serialize_object_instances(object_instance_list, size);
+}
+
+uint8_t* M2MTLVSerializer::serialize(M2MResourceList resource_list, uint32_t &size)
+{
+    bool valid = true;
+    return serialize_resources(resource_list, size,valid);
+}
+
+uint8_t* M2MTLVSerializer::serialize(M2MResource *resource, uint32_t &size)
+{
+    uint8_t* data = NULL;
+    serialize(resource, data, size);
+    return data;
+}
+
+uint8_t* M2MTLVSerializer::serialize_object_instances(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(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++) {
+                serialize(*it, data, size);
+            }
+        }
+    }
+    return data;
+}
+
+void M2MTLVSerializer::serialize(uint16_t id, M2MObjectInstance *object_instance, uint8_t *&data, uint32_t &size)
+{
+    uint8_t *resource_data = NULL;
+    uint32_t resource_size = 0;
+
+    bool valid = true;
+    resource_data = serialize_resources(object_instance->resources(),resource_size,valid);
+    if(valid) {
+        serialize_TILV(TYPE_OBJECT_INSTANCE, id, resource_data, resource_size, data, size);
+    }
+    free(resource_data);
+}
+
+bool M2MTLVSerializer::serialize(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(M2MResource *resource, uint8_t *&data, uint32_t &size)
+{
+    bool success = false;
+    if(resource->name_id() != -1) {
+        success = true;
+        serialize_TILV(TYPE_RESOURCE, resource->name_id(), resource->value(), resource->value_length(), data, size);
+    }
+    return success;
+}
+
+bool M2MTLVSerializer::serialize_multiple_resource(M2MResource *resource, uint8_t *&data, uint32_t &size)
+{
+    bool success = false;
+    uint8_t *nested_data = NULL;
+    uint32_t nested_data_size = 0;
+
+    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();
+            serialize_resource_instance(id, (*it), nested_data, nested_data_size);            
+        }
+    }
+    if(resource->name_id() != -1) {
+        success = true;
+        serialize_TILV(TYPE_MULTIPLE_RESOURCE, resource->name_id(), nested_data, nested_data_size, data, size);
+    }
+
+    free(nested_data);
+    nested_data = NULL;
+    return success;
+}
+
+void M2MTLVSerializer::serialize_resource_instance(uint16_t id, M2MResourceInstance *resource, uint8_t *&data, uint32_t &size)
+{
+    serialize_TILV(TYPE_RESOURCE_INSTANCE, id, resource->value(), resource->value_length(), data, size);
+}
+
+void 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;
+    uint32_t type_length = 1;
+    type += id < 256 ? 0 : ID16;
+    type += value_length < 8 ? value_length :
+            value_length < 256 ? LENGTH8 :
+            value_length < 65536 ? LENGTH16 : LENGTH24;
+    uint8_t *tlv_type = (uint8_t*)malloc(type_length+1);
+    memset(tlv_type,0,type_length+1);
+    *tlv_type = type & 0xFF;
+
+    uint32_t id_size = 0;
+    uint8_t* id_ptr = serialize_id(id, id_size);
+
+    uint32_t length_size = 0;
+    uint8_t* length_ptr = serialize_length(value_length, length_size);
+
+    tlv = (uint8_t*)malloc(size + type_length + id_size + length_size + value_length+1);
+    memset(tlv,0,size + type_length + id_size + length_size + value_length+1);
+    if(data) {
+        memcpy(tlv, data, size);
+    }
+    memcpy(tlv+size, tlv_type, type_length);
+    memcpy(tlv+size+type_length, id_ptr, id_size);
+    memcpy(tlv+size+type_length+id_size, length_ptr, length_size);
+    memcpy(tlv+size+type_length+id_size+length_size, value, value_length);
+
+    free(tlv_type) ;
+    free(length_ptr);
+    free(id_ptr);
+    free(data);
+
+    data = tlv;
+    size += type_length + id_size + length_size + value_length;
+}
+
+uint8_t* M2MTLVSerializer::serialize_id(uint16_t id, uint32_t &size)
+{
+    uint32_t id_size = id > 255 ? 2 : 1;
+    uint8_t *id_ptr = (uint8_t*)malloc(id_size);
+    memset(id_ptr, 0 , id_size);
+    size += id_size;
+    if(id > 255) {
+        *id_ptr = (id & 0xFF00) >> 8;
+        id_ptr++;
+        *id_ptr = id & 0xFF;
+        id_ptr--;
+    } else {
+        *id_ptr = id & 0xFF;
+    }
+    return id_ptr;
+}
+
+uint8_t* M2MTLVSerializer::serialize_length(uint32_t length, uint32_t &size)
+{
+    uint8_t *length_ptr = 0;
+    uint32_t length_size = 0;
+    if (length > 65535) {
+        length_size = 3;
+        length_ptr = (uint8_t*)malloc(length_size+1);
+        memset(length_ptr,0,length_size+1);
+        *length_ptr = (length & 0xFF0000) >> 16;
+        length_ptr++;
+        *length_ptr = (length & 0xFF00) >> 8;
+        length_ptr++;
+        *length_ptr = length & 0xFF;
+        length_ptr--;
+        length_ptr--;
+    } else if (length > 255) {
+        length_size = 2;
+        length_ptr = (uint8_t*)malloc(length_size+1);
+        memset(length_ptr,0,length_size+1);
+        *length_ptr = (length & 0xFF00) >> 8;
+        length_ptr++;
+        *length_ptr = length & 0xFF;
+        length_ptr--;
+    } else if (length > 7) {
+        length_size = 1;
+        length_ptr = (uint8_t*)malloc(length_size+1);
+        memset(length_ptr,0,length_size+1);
+        *length_ptr = length & 0xFF;
+    }
+    size += length_size;
+    return length_ptr;
+}
+