Diff: mbed-client/source/m2mobject.cpp

Revision:

11:cada08fc8a70

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-client/source/m2mobject.cpp	Thu Jun 09 17:08:36 2016 +0000
@@ -0,0 +1,559 @@
+/*
+ * 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 "mbed-client/m2mobject.h"
+#include "mbed-client/m2mobservationhandler.h"
+#include "mbed-client/m2mconstants.h"
+#include "include/m2mtlvserializer.h"
+#include "include/m2mtlvdeserializer.h"
+#include "include/nsdllinker.h"
+#include "include/m2mreporthandler.h"
+#include "ns_trace.h"
+
+M2MObject::M2MObject(const String &object_name)
+: M2MBase(object_name,M2MBase::Dynamic),
+  _max_instance_count(MAX_UNINT_16_COUNT)
+{
+    M2MBase::set_base_type(M2MBase::Object);
+    if(M2MBase::name_id() != -1) {
+        M2MBase::set_coap_content_type(COAP_CONTENT_OMA_TLV_TYPE);
+    }
+}
+
+M2MObject::~M2MObject()
+{
+    if(!_instance_list.empty()) {
+        M2MObjectInstanceList::const_iterator it;
+        it = _instance_list.begin();
+        M2MObjectInstance* obj = NULL;
+        uint16_t index = 0;
+        for (; it!=_instance_list.end(); it++, index++ ) {
+            //Free allocated memory for object instances.
+            obj = *it;
+
+            char *obj_inst_id = (char*)malloc(20);
+            if(obj_inst_id) {
+                snprintf(obj_inst_id, 20,"%d",index);
+
+                String obj_name = M2MBase::name();
+                obj_name += String("/");
+                obj_name += String(obj_inst_id);
+
+                free(obj_inst_id);
+                remove_resource_from_coap(obj_name);
+            }
+
+            delete obj;
+            obj = NULL;
+        }
+        remove_object_from_coap();
+        _instance_list.clear();
+    }
+}
+
+M2MObject& M2MObject::operator=(const M2MObject& other)
+{
+    if (this != &other) { // protect against invalid self-assignment
+        if(!other._instance_list.empty()){
+            M2MObjectInstance* ins = NULL;
+            M2MObjectInstanceList::const_iterator it;
+            it = other._instance_list.begin();
+            for (; it!=other._instance_list.end(); it++ ) {
+                ins = *it;
+                _instance_list.push_back(new M2MObjectInstance(*ins));
+            }
+        }
+    }
+    return *this;
+}
+
+M2MObject::M2MObject(const M2MObject& other)
+: M2MBase(other),
+  _max_instance_count(MAX_UNINT_16_COUNT)
+{
+    this->operator=(other);
+}
+
+M2MObjectInstance* M2MObject::create_object_instance(uint16_t instance_id)
+{
+    tr_debug("M2MObject::create_object_instance - id: %d", instance_id);
+    M2MObjectInstance *instance = NULL;
+    if(!object_instance(instance_id)) {
+        instance = new M2MObjectInstance(this->name(),*this);
+        if(instance) {
+            instance->set_instance_id(instance_id);
+            _instance_list.push_back(instance);
+            if(M2MBase::name_id() != -1) {
+                instance->set_coap_content_type(COAP_CONTENT_OMA_TLV_TYPE);
+            }
+        }
+    }
+    return instance;
+}
+
+bool M2MObject::remove_object_instance(uint16_t inst_id)
+{
+    tr_debug("M2MObject::remove_object_instance(inst_id %d)", inst_id);
+    bool success = false;
+    if(!_instance_list.empty()) {
+        M2MObjectInstance* obj = NULL;
+        M2MObjectInstanceList::const_iterator it;
+        it = _instance_list.begin();
+        int pos = 0;
+        for ( ; it != _instance_list.end(); it++, pos++ ) {
+            if((*it)->instance_id() == inst_id) {
+                // Instance found and deleted.
+                obj = *it;
+
+                char *obj_inst_id = (char*)malloc(20);
+                if(obj_inst_id) {
+                    snprintf(obj_inst_id, 20,"%d",obj->instance_id());
+
+                    String obj_name = name();
+                    obj_name += String("/");
+                    obj_name += String(obj_inst_id);
+
+                    free(obj_inst_id);
+
+                    delete obj;
+                    obj = NULL;
+                    _instance_list.erase(pos);
+                    success = true;
+
+                    remove_resource_from_coap(obj_name);
+                }
+                break;
+            }
+        }
+    }
+    return success;
+}
+
+M2MObjectInstance* M2MObject::object_instance(uint16_t inst_id) const
+{
+    tr_debug("M2MObject::object_instance(inst_id %d)", inst_id);
+    M2MObjectInstance *obj = NULL;
+    if(!_instance_list.empty()) {
+        M2MObjectInstanceList::const_iterator it;
+        it = _instance_list.begin();
+        for ( ; it != _instance_list.end(); it++ ) {
+            if((*it)->instance_id() == inst_id) {
+                // Instance found.
+                obj = *it;
+                break;
+            }
+        }
+    }
+    return obj;
+}
+
+const M2MObjectInstanceList& M2MObject::instances() const
+{
+    return _instance_list;
+}
+
+uint16_t M2MObject::instance_count() const
+{
+    return (uint16_t)_instance_list.size();
+}
+
+M2MBase::BaseType M2MObject::base_type() const
+{
+    return M2MBase::base_type();
+}
+
+void M2MObject::add_observation_level(M2MBase::Observation observation_level)
+{
+    M2MBase::add_observation_level(observation_level);
+    if(!_instance_list.empty()) {
+        M2MObjectInstanceList::const_iterator it;
+        it = _instance_list.begin();
+        for ( ; it != _instance_list.end(); it++ ) {
+            (*it)->add_observation_level(observation_level);
+        }
+    }
+}
+
+void M2MObject::remove_observation_level(M2MBase::Observation observation_level)
+{
+    M2MBase::remove_observation_level(observation_level);
+    if(!_instance_list.empty()) {
+        M2MObjectInstanceList::const_iterator it;
+        it = _instance_list.begin();
+        for ( ; it != _instance_list.end(); it++ ) {
+            (*it)->remove_observation_level(observation_level);
+        }
+    }
+}
+
+sn_coap_hdr_s* M2MObject::handle_get_request(nsdl_s *nsdl,
+                                             sn_coap_hdr_s *received_coap_header,
+                                             M2MObservationHandler *observation_handler)
+{
+    tr_debug("M2MObject::handle_get_request()");
+    sn_coap_msg_code_e msg_code = COAP_MSG_CODE_RESPONSE_CONTENT;
+    sn_coap_hdr_s * coap_response = sn_nsdl_build_response(nsdl,
+                                                           received_coap_header,
+                                                           msg_code);
+    //TODO: GET for Object is not yet implemented.
+    // Need to first fix C library and then implement on C++ side.
+    uint8_t * data = NULL;
+    uint32_t  data_length = 0;
+    //TODO: GET for Object is not yet implemented.
+    // Need to first fix C library and then implement on C++ side.
+    if(received_coap_header) {
+        // process the GET if we have registered a callback for it
+        if ((operation() & SN_GRS_GET_ALLOWED) != 0) {
+            if(coap_response) {
+                uint16_t coap_content_type = 0;
+                bool content_type_present = false;
+                if(received_coap_header->content_type_ptr) {
+                    content_type_present = true;
+                    coap_response->content_type_ptr = (uint8_t*)malloc(received_coap_header->content_type_len);
+                    if(coap_response->content_type_ptr) {
+                        memset(coap_response->content_type_ptr, 0, received_coap_header->content_type_len);
+                        memcpy(coap_response->content_type_ptr,
+                               received_coap_header->content_type_ptr,
+                               received_coap_header->content_type_len);
+                        coap_response->content_type_len = received_coap_header->content_type_len;
+                        for(uint8_t i = 0; i < coap_response->content_type_len; i++) {
+                            coap_content_type = (coap_content_type << 8) + (coap_response->content_type_ptr[i] & 0xFF);
+                        }
+                    }
+                }
+                if(!content_type_present &&
+                   M2MBase::coap_content_type() == COAP_CONTENT_OMA_TLV_TYPE) {
+                    coap_content_type = COAP_CONTENT_OMA_TLV_TYPE;
+                }
+
+                tr_debug("M2MObject::handle_get_request() - Request Content-Type %d", coap_content_type);
+
+                // fill in the CoAP response payload
+                if(COAP_CONTENT_OMA_TLV_TYPE == coap_content_type) {
+                    M2MTLVSerializer *serializer = new M2MTLVSerializer();
+                    data = serializer->serialize(_instance_list, data_length);
+                    delete serializer;
+                } else { // TOD0: Implement JSON Format.
+                    msg_code = COAP_MSG_CODE_RESPONSE_UNSUPPORTED_CONTENT_FORMAT; // Content format not supported
+                }
+
+                coap_response->payload_len = data_length;
+                coap_response->payload_ptr = data;
+
+                coap_response->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s));
+                memset(coap_response->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
+
+                coap_response->options_list_ptr->max_age_ptr = (uint8_t*)malloc(1);
+                memset(coap_response->options_list_ptr->max_age_ptr,0,1);
+                coap_response->options_list_ptr->max_age_len = 1;
+
+                if(data){
+                    if(received_coap_header->token_ptr) {
+                        tr_debug("M2MObject::handle_get_request - Sets Observation Token to resource");
+                        set_observation_token(received_coap_header->token_ptr,
+                                              received_coap_header->token_len);
+                    }
+
+                    if(received_coap_header->options_list_ptr) {
+                        if(received_coap_header->options_list_ptr->observe) {
+                            if (is_observable()) {
+                                uint32_t number = 0;
+                                uint8_t observe_option = 0;
+                                if(received_coap_header->options_list_ptr->observe_ptr) {
+                                    observe_option = *received_coap_header->options_list_ptr->observe_ptr;
+                                }
+                                if(START_OBSERVATION == observe_option) {
+                                    tr_debug("M2MObject::handle_get_request - Starts Observation");
+                                    // If the observe length is 0 means register for observation.
+                                    if(received_coap_header->options_list_ptr->observe_len != 0) {
+                                        for(int i=0;i < received_coap_header->options_list_ptr->observe_len; i++) {
+                                        number = (*(received_coap_header->options_list_ptr->observe_ptr + i) & 0xff) <<
+                                                 8*(received_coap_header->options_list_ptr->observe_len- 1 - i);
+                                        }
+                                    }
+                                    // If the observe value is 0 means register for observation.
+                                    if(number == 0) {
+                                        tr_debug("M2MObject::handle_get_request - Put Resource under Observation");
+                                        set_under_observation(true,observation_handler);
+                                        add_observation_level(M2MBase::O_Attribute);
+                                        uint8_t *obs_number = (uint8_t*)malloc(3);
+                                        memset(obs_number,0,3);
+                                        uint8_t observation_number_length = 1;
+
+                                        uint16_t number = observation_number();
+
+                                        tr_debug("M2MObject::handle_get_request - Observation Number %d", number);
+                                        obs_number[0] = ((number>>8) & 0xFF);
+                                        obs_number[1] = (number & 0xFF);
+
+                                        if(number > 0xFF) {
+                                            observation_number_length = 2;
+                                        }
+                                        coap_response->options_list_ptr->observe_ptr = obs_number;
+                                        coap_response->options_list_ptr->observe_len = observation_number_length;
+                                    }
+                                } else if (STOP_OBSERVATION == observe_option) {
+                                    tr_debug("M2MObject::handle_get_request - Stops Observation");
+                                    // If the observe options_list_ptr->observe_ptr value is 1 means de-register from observation.
+                                    set_under_observation(false,NULL);
+                                    remove_observation_level(M2MBase::O_Attribute);
+                                }
+                                msg_code = COAP_MSG_CODE_RESPONSE_CONTENT;
+                            }
+                            else {
+                                msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+                            }
+                        }
+                    }
+                } else {
+                    msg_code = COAP_MSG_CODE_RESPONSE_UNSUPPORTED_CONTENT_FORMAT; // Content format not supported
+                }
+            }
+        }else {
+            tr_error("M2MResource::handle_get_request - Return COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED");
+            // Operation is not allowed.
+            msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+        }
+    } else {
+        msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+    }
+    if(coap_response) {
+        coap_response->msg_code = msg_code;
+    }
+    return coap_response;
+}
+
+sn_coap_hdr_s* M2MObject::handle_put_request(nsdl_s *nsdl,
+                                             sn_coap_hdr_s *received_coap_header,
+                                             M2MObservationHandler */*observation_handler*/)
+{
+    tr_debug("M2MObject::handle_put_request()");
+    sn_coap_msg_code_e msg_code = COAP_MSG_CODE_RESPONSE_CHANGED; // 2.04
+    sn_coap_hdr_s *coap_response = sn_nsdl_build_response(nsdl,
+                                                          received_coap_header,
+                                                          msg_code);
+    if(received_coap_header) {
+        if ((operation() & SN_GRS_PUT_ALLOWED) != 0) {
+            if(!received_coap_header->payload_ptr) {
+                if(received_coap_header->options_list_ptr &&
+                   received_coap_header->options_list_ptr->uri_query_ptr) {
+                    char *query = (char*)malloc(received_coap_header->options_list_ptr->uri_query_len+1);
+                    if (query){
+                        memset(query, 0, received_coap_header->options_list_ptr->uri_query_len+1);
+                        memcpy(query,
+                            received_coap_header->options_list_ptr->uri_query_ptr,
+                            received_coap_header->options_list_ptr->uri_query_len);
+                        memset(query + received_coap_header->options_list_ptr->uri_query_len,'\0',1);//String terminator
+                       tr_debug("M2MObject::handle_put_request() - Query %s", query);
+                        // if anything was updated, re-initialize the stored notification attributes
+                        if (!handle_observation_attribute(query)){
+                            tr_debug("M2MObject::handle_put_request() - Invalid query");
+                            msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST; // 4.00
+                        }
+                        free(query);
+                    }
+                } else {
+                    tr_error("M2MObject::handle_put_request() - COAP_MSG_CODE_RESPONSE_BAD_REQUEST - Empty URI_QUERY");
+                    msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST;
+                }
+            } else {
+                tr_error("M2MObject::handle_put_request() - COAP_MSG_CODE_RESPONSE_BAD_REQUEST -Payload exists");
+                msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST;
+            }
+        } else {
+            // Operation is not allowed.
+            tr_error("M2MObject::handle_put_request() - COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED");
+            msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+        }
+    } else {
+        msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+    }
+    if(coap_response) {
+        coap_response->msg_code = msg_code;
+    }
+    return coap_response;
+}
+
+
+sn_coap_hdr_s* M2MObject::handle_post_request(nsdl_s *nsdl,
+                                              sn_coap_hdr_s *received_coap_header,
+                                              M2MObservationHandler *observation_handler)
+{
+    tr_debug("M2MObject::handle_post_request()");    
+    sn_coap_msg_code_e msg_code = COAP_MSG_CODE_RESPONSE_CHANGED; // 2.04
+    // process the POST if we have registered a callback for it    
+    sn_coap_hdr_s *coap_response = sn_nsdl_build_response(nsdl,
+                                                          received_coap_header,
+                                                          msg_code);
+
+    if(received_coap_header) {
+        if ((operation() & SN_GRS_POST_ALLOWED) != 0) {
+            if(received_coap_header->payload_ptr) {
+                tr_debug("M2MObject::handle_post_request() - Update Object with new values");
+                uint16_t coap_content_type = 0;
+                bool content_type_present = false;
+                if(received_coap_header->content_type_ptr) {
+                    content_type_present = true;
+                    if(coap_response) {
+                        coap_response->content_type_ptr = (uint8_t*)malloc(received_coap_header->content_type_len);
+                        if(coap_response->content_type_ptr) {
+                            memset(coap_response->content_type_ptr, 0, received_coap_header->content_type_len);
+                            memcpy(coap_response->content_type_ptr,
+                                   received_coap_header->content_type_ptr,
+                                   received_coap_header->content_type_len);
+                            coap_response->content_type_len = received_coap_header->content_type_len;
+                            for(uint8_t i = 0; i < coap_response->content_type_len; i++) {
+                                coap_content_type = (coap_content_type << 8) + (coap_response->content_type_ptr[i] & 0xFF);
+                            }
+                        }
+                    }
+                } // if(received_coap_header->content_type_ptr)
+                if(!content_type_present &&
+                   M2MBase::coap_content_type() == COAP_CONTENT_OMA_TLV_TYPE) {
+                    coap_content_type = COAP_CONTENT_OMA_TLV_TYPE;
+                }
+
+                tr_debug("M2MObject::handle_post_request() - Request Content-Type %d", coap_content_type);
+
+                if(COAP_CONTENT_OMA_TLV_TYPE == coap_content_type) {
+                    uint16_t instance_id = 0;
+                    // Check next free instance id
+                    for(instance_id = 0; instance_id <= _max_instance_count; instance_id++) {
+                        if(NULL == object_instance(instance_id)) {
+                            break;
+                        }
+                        if(instance_id == _max_instance_count) {
+                            msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+                            break;
+                        }
+                    }
+                    if(COAP_MSG_CODE_RESPONSE_CHANGED == msg_code) {
+                        M2MTLVDeserializer *deserializer = new M2MTLVDeserializer();
+                        bool is_obj_instance = false;
+                        bool obj_instance_exists = false;
+                        if (deserializer) {
+                            is_obj_instance = deserializer->is_object_instance(received_coap_header->payload_ptr);
+                            if (is_obj_instance) {
+                                instance_id = deserializer->instance_id(received_coap_header->payload_ptr);
+                                tr_debug("M2MObject::handle_post_request() - instance id in TLV: %d", instance_id);
+                                // Check if instance id already exists
+                                if (object_instance(instance_id)){
+                                    obj_instance_exists = true;
+                                }
+                            }
+                        }
+                        if (!obj_instance_exists) {
+                            M2MObjectInstance *obj_instance = create_object_instance(instance_id);
+                            if(obj_instance) {
+                                obj_instance->set_operation(M2MBase::GET_PUT_ALLOWED);
+                            }
+
+                            if(deserializer) {
+                                String obj_name = "";
+                                char *obj_inst_id = NULL;
+                                M2MTLVDeserializer::Error error = M2MTLVDeserializer::None;
+                                if(is_obj_instance) {
+                                    tr_debug("M2MObject::handle_post_request() - TLV data contains ObjectInstance");
+                                    error = deserializer->deserialise_object_instances(received_coap_header->payload_ptr,
+                                                                               received_coap_header->payload_len,
+                                                                               *this,
+                                                                               M2MTLVDeserializer::Post);
+                                } else if(deserializer->is_resource(received_coap_header->payload_ptr) ||
+                                          deserializer->is_multiple_resource(received_coap_header->payload_ptr)) {
+                                    tr_debug("M2MObject::handle_post_request() - TLV data contains Resources");
+                                    error = deserializer->deserialize_resources(received_coap_header->payload_ptr,
+                                                                                received_coap_header->payload_len,
+                                                                                *obj_instance,
+                                                                                M2MTLVDeserializer::Post);
+                                } else {
+                                    error = M2MTLVDeserializer::NotValid;
+                                }
+                                switch(error) {
+                                    case M2MTLVDeserializer::None:
+                                        if(observation_handler) {
+                                            observation_handler->value_updated(this);
+                                        }
+                                        coap_response->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s));
+                                        if (coap_response->options_list_ptr) {
+                                            memset(coap_response->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
+
+                                            obj_name = M2MBase::name();
+                                            obj_name += String("/");
+                                            obj_inst_id = (char*)malloc(10);
+                                            snprintf(obj_inst_id, 10,"%d",instance_id);
+                                            obj_name += obj_inst_id;
+
+                                            coap_response->options_list_ptr->location_path_len = obj_name.length();
+                                            if (coap_response->options_list_ptr->location_path_len != 0) {
+                                                coap_response->options_list_ptr->location_path_ptr =
+                                                        (uint8_t*)malloc(coap_response->options_list_ptr->location_path_len);
+                                                if (coap_response->options_list_ptr->location_path_ptr) {
+                                                    memcpy(coap_response->options_list_ptr->location_path_ptr,
+                                                           obj_name.c_str(),
+                                                           coap_response->options_list_ptr->location_path_len);
+                                                }
+                                            }
+                                            free(obj_inst_id);
+                                        }
+                                        msg_code = COAP_MSG_CODE_RESPONSE_CREATED;                                        
+                                        break;
+                                    case M2MTLVDeserializer::NotAllowed:
+                                        msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED;
+                                        break;
+                                    case M2MTLVDeserializer::NotValid:
+                                        msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST;
+                                        break;
+                                    case M2MTLVDeserializer::NotFound:
+                                        msg_code = COAP_MSG_CODE_RESPONSE_NOT_FOUND;
+                                        break;
+                                }                                
+                            }
+                        } else {
+                            tr_debug("M2MObject::handle_post_request() - COAP_MSG_CODE_RESPONSE_BAD_REQUEST");
+                            msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST;
+                        }
+                        delete deserializer;
+                    }
+                } else {
+                    msg_code =COAP_MSG_CODE_RESPONSE_UNSUPPORTED_CONTENT_FORMAT;
+                } // if(COAP_CONTENT_OMA_TLV_TYPE == coap_content_type)
+            } else {
+                tr_error("M2MObject::handle_post_request - COAP_MSG_CODE_RESPONSE_BAD_REQUEST - Missing Payload");
+                msg_code = COAP_MSG_CODE_RESPONSE_BAD_REQUEST; //
+            }
+        } else { // if ((object->operation() & SN_GRS_POST_ALLOWED) != 0)
+            tr_error("M2MObject::handle_post_request - COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED");
+            msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED; // 4.05
+        }
+    } else { //if(received_coap_header)
+        tr_error("M2MObject::handle_post_request - COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED");
+        msg_code = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED; // 4.05
+    }
+
+    if(coap_response) {
+        coap_response->msg_code = msg_code;
+    }
+    return coap_response;
+}
+
+void M2MObject::notification_update()
+{
+    tr_debug("M2MObject::notification_update");
+    M2MReportHandler *report_handler = M2MBase::report_handler();
+    if(report_handler && is_observable()) {
+        report_handler->set_notification_trigger();
+    }
+}
+