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Example
Dependencies: FXAS21002 FXOS8700Q
Diff: simple-mbed-cloud-client/mbed-cloud-client/mbed-client/mbed-client-c/source/sn_grs.c
- Revision:
- 0:11cc2b7889af
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/simple-mbed-cloud-client/mbed-cloud-client/mbed-client/mbed-client-c/source/sn_grs.c Tue Nov 19 09:49:38 2019 +0000 @@ -0,0 +1,735 @@ +/* + * Copyright (c) 2011-2015 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. + */ + +/** + * + * \file sn_grs.c + * + * \brief General resource server. + * + */ +#include <string.h> +#include <stdlib.h> +#include "ns_list.h" +#include "ns_types.h" +#include "sn_nsdl.h" +#include "sn_coap_header.h" +#include "sn_coap_protocol.h" +#include "source/include/sn_coap_protocol_internal.h" +#include "sn_nsdl_lib.h" +#include "sn_grs.h" + +/* Defines */ +#define WELLKNOWN_PATH_LEN 16 +#define WELLKNOWN_PATH (".well-known/core") + +/* Local static function prototypes */ +static int8_t sn_grs_resource_info_free(struct grs_s *handle, sn_nsdl_dynamic_resource_parameters_s *resource_ptr); +static char *sn_grs_convert_uri(uint16_t *uri_len, const char *uri_ptr); +static int8_t sn_grs_core_request(struct nsdl_s *handle, sn_nsdl_addr_s *src_addr_ptr, sn_coap_hdr_s *coap_packet_ptr); +static uint8_t coap_tx_callback(uint8_t *, uint16_t, sn_nsdl_addr_s *, void *); +static int8_t coap_rx_callback(sn_coap_hdr_s *coap_ptr, sn_nsdl_addr_s *address_ptr, void *param); + +/* Extern function prototypes */ +extern int8_t sn_nsdl_build_registration_body(struct nsdl_s *handle, sn_coap_hdr_s *message_ptr, uint8_t updating_registeration); + +/** + * \fn int8_t sn_grs_destroy(void) + * \brief This function may be used to flush GRS related stuff when a program exits. + * @return always 0. + */ +extern int8_t sn_grs_destroy(struct grs_s *handle) +{ + if( handle == NULL ){ + return 0; + } + ns_list_foreach_safe(sn_nsdl_dynamic_resource_parameters_s, tmp, &handle->resource_root_list) { + ns_list_remove(&handle->resource_root_list, tmp); + --handle->resource_root_count; + sn_grs_resource_info_free(handle, tmp); + } + handle->sn_grs_free(handle); + + return 0; +} + +static uint8_t coap_tx_callback(uint8_t *data_ptr, uint16_t data_len, sn_nsdl_addr_s *address_ptr, void *param) +{ + struct nsdl_s *handle = (struct nsdl_s *)param; + + if (handle == NULL) { + return 0; + } + + return handle->grs->sn_grs_tx_callback(handle, SN_NSDL_PROTOCOL_COAP, data_ptr, data_len, address_ptr); +} + +static int8_t coap_rx_callback(sn_coap_hdr_s *coap_ptr, sn_nsdl_addr_s *address_ptr, void *param) +{ + struct nsdl_s *handle = (struct nsdl_s *)param; + + if (handle == NULL) { + return 0; + } + + return handle->sn_nsdl_rx_callback(handle, coap_ptr, address_ptr); +} + +/** + * \fn int8_t sn_grs_init (uint8_t (*sn_grs_tx_callback_ptr)(sn_nsdl_capab_e , uint8_t *, uint16_t, + * sn_nsdl_addr_s *), int8_t (*sn_grs_rx_callback_ptr)(sn_coap_hdr_s *, sn_nsdl_addr_s *), sn_nsdl_mem_s *sn_memory) + * + * \brief GRS library initialize function. + * + * This function initializes GRS and CoAP libraries. + * + * \param sn_grs_tx_callback A function pointer to a transmit callback function. + * \param *sn_grs_rx_callback_ptr A function pointer to a receiving callback function. If received packet is not for GRS, it will be passed to + * upper level (NSDL) to be proceed. + * \param sn_memory A pointer to a structure containing the platform specific functions for memory allocation and free. + * + * \return success = 0, failure = -1 + * +*/ +extern struct grs_s *sn_grs_init(uint8_t (*sn_grs_tx_callback_ptr)(struct nsdl_s *, sn_nsdl_capab_e , uint8_t *, uint16_t, + sn_nsdl_addr_s *), int8_t (*sn_grs_rx_callback_ptr)(struct nsdl_s *, sn_coap_hdr_s *, sn_nsdl_addr_s *), + void *(*sn_grs_alloc)(uint16_t), void (*sn_grs_free)(void *)) +{ + + struct grs_s *handle_ptr = NULL; + + /* Check parameters */ + if (sn_grs_alloc == NULL || sn_grs_free == NULL || + sn_grs_tx_callback_ptr == NULL || sn_grs_rx_callback_ptr == NULL) { + return NULL; + } + + handle_ptr = sn_grs_alloc(sizeof(struct grs_s)); + + if (handle_ptr == NULL) { + return NULL; + } + + memset(handle_ptr, 0, sizeof(struct grs_s)); + + /* Allocation and free - function pointers */ + handle_ptr->sn_grs_alloc = sn_grs_alloc; + handle_ptr->sn_grs_free = sn_grs_free; + + /* TX callback function pointer */ + handle_ptr->sn_grs_tx_callback = sn_grs_tx_callback_ptr; + handle_ptr->sn_grs_rx_callback = sn_grs_rx_callback_ptr; + + /* Initialize CoAP protocol library */ + handle_ptr->coap = sn_coap_protocol_init(sn_grs_alloc, sn_grs_free, coap_tx_callback, coap_rx_callback); + + return handle_ptr; +} + +extern sn_nsdl_dynamic_resource_parameters_s *sn_grs_get_first_resource(struct grs_s *handle) +{ + if( !handle ){ + return NULL; + } + return ns_list_get_first(&handle->resource_root_list); +} + +extern sn_nsdl_dynamic_resource_parameters_s *sn_grs_get_next_resource(struct grs_s *handle, + const sn_nsdl_dynamic_resource_parameters_s *sn_grs_current_resource) +{ + if( !handle || !sn_grs_current_resource ){ + return NULL; + } + return ns_list_get_next(&handle->resource_root_list, sn_grs_current_resource); +} + +extern int8_t sn_grs_delete_resource(struct grs_s *handle, const char *path) +{ + /* Local variables */ + sn_nsdl_dynamic_resource_parameters_s *resource_temp = NULL; + + /* Search if resource found */ + resource_temp = sn_grs_search_resource(handle, path, SN_GRS_SEARCH_METHOD); + + /* If not found */ + if (resource_temp == NULL) { + return SN_NSDL_FAILURE; + } + + /* If found, delete it and delete also subresources, if there is any */ + do { + /* Remove from list */ + ns_list_remove(&handle->resource_root_list, resource_temp); + --handle->resource_root_count; + + /* Free */ + sn_grs_resource_info_free(handle, resource_temp); + + /* Search for subresources */ + resource_temp = sn_grs_search_resource(handle, path, SN_GRS_DELETE_METHOD); + } while (resource_temp != NULL); + + return SN_NSDL_SUCCESS; +} + +int8_t sn_grs_put_resource(struct grs_s *handle, sn_nsdl_dynamic_resource_parameters_s *res) +{ + if (!res || !handle) { + return SN_NSDL_FAILURE; + } + + /* Check path validity */ + if (!res->static_resource_parameters->path || res->static_resource_parameters->path[0] == '\0') { + return SN_GRS_INVALID_PATH; + } + + /* Check if resource already exists */ + if (sn_grs_search_resource(handle, + res->static_resource_parameters->path, SN_GRS_SEARCH_METHOD) != (sn_nsdl_dynamic_resource_parameters_s *)NULL) { + return SN_GRS_RESOURCE_ALREADY_EXISTS; + } + + res->registered = SN_NDSL_RESOURCE_NOT_REGISTERED; + + ns_list_add_to_start(&handle->resource_root_list, res); + ++handle->resource_root_count; + + return SN_NSDL_SUCCESS; +} + +int8_t sn_grs_pop_resource(struct grs_s *handle, sn_nsdl_dynamic_resource_parameters_s *res) +{ + if (!res || !handle) { + return SN_NSDL_FAILURE; + } + + /* Check path validity */ + if (!res->static_resource_parameters->path || res->static_resource_parameters->path[0] == '\0') { + return SN_GRS_INVALID_PATH; + } + + /* Check if resource exists on list. */ + if (sn_grs_search_resource(handle, + res->static_resource_parameters->path, SN_GRS_SEARCH_METHOD) == (sn_nsdl_dynamic_resource_parameters_s *)NULL) { + return SN_NSDL_FAILURE; + } + + ns_list_remove(&handle->resource_root_list, res); + --handle->resource_root_count; + + return SN_NSDL_SUCCESS; +} + +/** + * \fn extern int8_t sn_grs_process_coap(uint8_t *packet, uint16_t *packet_len, sn_nsdl_addr_s *src) + * + * \brief To push CoAP packet to GRS library + * + * Used to push an CoAP packet to GRS library for processing. + * + * \param *packet Pointer to a uint8_t array containing the packet (including the CoAP headers). + * After successful execution this array may contain the response packet. + * + * \param *packet_len Pointer to length of the packet. After successful execution this array may contain the length + * of the response packet. + * + * \param *src Pointer to packet source address information. After successful execution this array may contain + * the destination address of the response packet. + * + * \return 0 = success, -1 = failure +*/ +extern int8_t sn_grs_process_coap(struct nsdl_s *nsdl_handle, sn_coap_hdr_s *coap_packet_ptr, sn_nsdl_addr_s *src_addr_ptr) +{ + if( !coap_packet_ptr || !nsdl_handle){ + return SN_NSDL_FAILURE; + } + + sn_nsdl_dynamic_resource_parameters_s *resource_temp_ptr = NULL; + sn_coap_msg_code_e status = COAP_MSG_CODE_EMPTY; + sn_coap_hdr_s *response_message_hdr_ptr = NULL; + struct grs_s *handle = nsdl_handle->grs; + bool static_get_request = false; + + if (coap_packet_ptr->msg_code <= COAP_MSG_CODE_REQUEST_DELETE) { + /* Check if .well-known/core */ + if (coap_packet_ptr->uri_path_len == WELLKNOWN_PATH_LEN && memcmp(coap_packet_ptr->uri_path_ptr, WELLKNOWN_PATH, WELLKNOWN_PATH_LEN) == 0) { + return sn_grs_core_request(nsdl_handle, src_addr_ptr, coap_packet_ptr); + } + + /* Get resource */ + char* path = nsdl_handle->grs->sn_grs_alloc(coap_packet_ptr->uri_path_len + 1); + if (!path) { + return SN_NSDL_FAILURE; + } + + memcpy(path, + coap_packet_ptr->uri_path_ptr, + coap_packet_ptr->uri_path_len); + path[coap_packet_ptr->uri_path_len] = '\0'; + + resource_temp_ptr = sn_grs_search_resource(handle, path, SN_GRS_SEARCH_METHOD); + nsdl_handle->grs->sn_grs_free(path); + + /* * * * * * * * * * * */ + /* If resource exists */ + /* * * * * * * * * * * */ + if (resource_temp_ptr) { + /* If dynamic resource, go to callback */ + if (resource_temp_ptr->static_resource_parameters->mode == SN_GRS_DYNAMIC) { + /* Check accesses */ + if (((coap_packet_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) && !(resource_temp_ptr->access & SN_GRS_GET_ALLOWED)) || + ((coap_packet_ptr->msg_code == COAP_MSG_CODE_REQUEST_POST) && !(resource_temp_ptr->access & SN_GRS_POST_ALLOWED)) || + ((coap_packet_ptr->msg_code == COAP_MSG_CODE_REQUEST_PUT) && !(resource_temp_ptr->access & SN_GRS_PUT_ALLOWED)) || + ((coap_packet_ptr->msg_code == COAP_MSG_CODE_REQUEST_DELETE) && !(resource_temp_ptr->access & SN_GRS_DELETE_ALLOWED))) { + status = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED; + } else { + /* Do not call null pointer.. */ + if (resource_temp_ptr->sn_grs_dyn_res_callback != NULL) { + resource_temp_ptr->sn_grs_dyn_res_callback(nsdl_handle, coap_packet_ptr, src_addr_ptr, SN_NSDL_PROTOCOL_COAP); + } else { + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + } + + return SN_NSDL_SUCCESS; + } + } else { + /* Static resource handling */ + switch (coap_packet_ptr->msg_code) { + case COAP_MSG_CODE_REQUEST_GET: + if (resource_temp_ptr->access & SN_GRS_GET_ALLOWED) { + status = COAP_MSG_CODE_RESPONSE_CONTENT; + static_get_request = true; + } else { + status = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED; + } + break; + + case COAP_MSG_CODE_REQUEST_POST: + case COAP_MSG_CODE_REQUEST_PUT: + case COAP_MSG_CODE_REQUEST_DELETE: + status = COAP_MSG_CODE_RESPONSE_METHOD_NOT_ALLOWED; + break; + + default: + status = COAP_MSG_CODE_RESPONSE_FORBIDDEN; + break; + } + } + } + + /* * * * * * * * * * * * * * */ + /* If resource was not found */ + /* * * * * * * * * * * * * * */ + + else { + if (coap_packet_ptr->msg_code == COAP_MSG_CODE_REQUEST_POST) { + handle->sn_grs_rx_callback(nsdl_handle, coap_packet_ptr, src_addr_ptr); + + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + return SN_NSDL_SUCCESS; + } else { + status = COAP_MSG_CODE_RESPONSE_NOT_FOUND; + } + } + } + + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + /* If received packed was other than reset, create response */ + /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + if (coap_packet_ptr->msg_type != COAP_MSG_TYPE_RESET && coap_packet_ptr->msg_type != COAP_MSG_TYPE_ACKNOWLEDGEMENT) { + + /* Allocate resopnse message */ + response_message_hdr_ptr = sn_coap_parser_alloc_message(handle->coap); + if (!response_message_hdr_ptr) { + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + return SN_NSDL_FAILURE; + } + + /* If status has not been defined, response internal server error */ + if (status == COAP_MSG_CODE_EMPTY) { + status = COAP_MSG_CODE_RESPONSE_INTERNAL_SERVER_ERROR; + } + + /* Fill header */ + response_message_hdr_ptr->msg_code = status; + + if (coap_packet_ptr->msg_type == COAP_MSG_TYPE_CONFIRMABLE) { + response_message_hdr_ptr->msg_type = COAP_MSG_TYPE_ACKNOWLEDGEMENT; + } else { + response_message_hdr_ptr->msg_type = COAP_MSG_TYPE_NON_CONFIRMABLE; + } + + response_message_hdr_ptr->msg_id = coap_packet_ptr->msg_id; + + if (coap_packet_ptr->token_ptr) { + response_message_hdr_ptr->token_len = coap_packet_ptr->token_len; + response_message_hdr_ptr->token_ptr = handle->sn_grs_alloc(response_message_hdr_ptr->token_len); + if (!response_message_hdr_ptr->token_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, response_message_hdr_ptr); + + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + return SN_NSDL_FAILURE; + } + memcpy(response_message_hdr_ptr->token_ptr, coap_packet_ptr->token_ptr, response_message_hdr_ptr->token_len); + } + + if (status == COAP_MSG_CODE_RESPONSE_CONTENT) { + /* Add content type if other than default */ + if (resource_temp_ptr->static_resource_parameters) { + response_message_hdr_ptr->content_format = + (sn_coap_content_format_e) resource_temp_ptr->coap_content_type; + } + + /* Add payload */ + if (resource_temp_ptr->resource_len != 0) { + response_message_hdr_ptr->payload_len = resource_temp_ptr->resource_len; + response_message_hdr_ptr->payload_ptr = handle->sn_grs_alloc(response_message_hdr_ptr->payload_len); + + if (!response_message_hdr_ptr->payload_ptr) { + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, response_message_hdr_ptr); + + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + return SN_NSDL_FAILURE; + } + + memcpy(response_message_hdr_ptr->payload_ptr, + resource_temp_ptr->resource, + response_message_hdr_ptr->payload_len); + } + // Add max-age attribute for static resources. + // Not a mandatory parameter, no need to return in case of memory allocation fails. + if (static_get_request) { + if (sn_coap_parser_alloc_options(handle->coap, response_message_hdr_ptr)) { + response_message_hdr_ptr->options_list_ptr->max_age = 0; + } + } + } + sn_grs_send_coap_message(nsdl_handle, src_addr_ptr, response_message_hdr_ptr); + + if (response_message_hdr_ptr->payload_ptr) { + handle->sn_grs_free(response_message_hdr_ptr->payload_ptr); + response_message_hdr_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, response_message_hdr_ptr); + } + + /* Free parsed CoAP message */ + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->coap, coap_packet_ptr); + + return SN_NSDL_SUCCESS; +} + +extern int8_t sn_grs_send_coap_message(struct nsdl_s *handle, sn_nsdl_addr_s *address_ptr, sn_coap_hdr_s *coap_hdr_ptr) +{ + uint8_t *message_ptr = NULL; + uint16_t message_len = 0; + int16_t ret_val = 0; + + if( !handle ){ + return SN_NSDL_FAILURE; + } + +#if SN_COAP_MAX_BLOCKWISE_PAYLOAD_SIZE /* If Message blockwising is not used at all, this part of code will not be compiled */ + ret_val = prepare_blockwise_message(handle->grs->coap, coap_hdr_ptr); + if( 0 != ret_val ) { + return SN_NSDL_FAILURE; + } +#endif + + /* Calculate message length */ + message_len = sn_coap_builder_calc_needed_packet_data_size_2(coap_hdr_ptr, handle->grs->coap->sn_coap_block_data_size); + + /* Allocate memory for message and check was allocating successfully */ + message_ptr = handle->grs->sn_grs_alloc(message_len); + if (message_ptr == NULL) { + return SN_NSDL_FAILURE; + } + + /* Build CoAP message */ + ret_val = sn_coap_protocol_build(handle->grs->coap, address_ptr, message_ptr, coap_hdr_ptr, (void *)handle); + if (ret_val < 0) { + handle->grs->sn_grs_free(message_ptr); + message_ptr = 0; + if (ret_val == -4) { + return SN_NSDL_RESEND_QUEUE_FULL; + } else { + return SN_NSDL_FAILURE; + } + } + + /* Call tx callback function to send message */ + ret_val = handle->grs->sn_grs_tx_callback(handle, SN_NSDL_PROTOCOL_COAP, message_ptr, message_len, address_ptr); + + /* Free allocated memory */ + handle->grs->sn_grs_free(message_ptr); + message_ptr = 0; + + if (ret_val == 0) { + return SN_NSDL_FAILURE; + } else { + return SN_NSDL_SUCCESS; + } +} + +static int8_t sn_grs_core_request(struct nsdl_s *handle, sn_nsdl_addr_s *src_addr_ptr, sn_coap_hdr_s *coap_packet_ptr) +{ + sn_coap_hdr_s *response_message_hdr_ptr = NULL; + sn_coap_content_format_e wellknown_content_format = COAP_CT_LINK_FORMAT; + + /* Allocate response message */ + response_message_hdr_ptr = sn_coap_parser_alloc_message(handle->grs->coap); + if (response_message_hdr_ptr == NULL) { + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->grs->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->grs->coap, coap_packet_ptr); + return SN_NSDL_FAILURE; + } + + /* Build response */ + response_message_hdr_ptr->msg_code = COAP_MSG_CODE_RESPONSE_CONTENT; + response_message_hdr_ptr->msg_type = COAP_MSG_TYPE_ACKNOWLEDGEMENT; + response_message_hdr_ptr->msg_id = coap_packet_ptr->msg_id; + response_message_hdr_ptr->content_format = wellknown_content_format; + + sn_nsdl_build_registration_body(handle, response_message_hdr_ptr, 0); + + /* Send and free */ + sn_grs_send_coap_message(handle, src_addr_ptr, response_message_hdr_ptr); + + if (response_message_hdr_ptr->payload_ptr) { + handle->grs->sn_grs_free(response_message_hdr_ptr->payload_ptr); + response_message_hdr_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->grs->coap, response_message_hdr_ptr); + + /* Free parsed CoAP message */ + if (coap_packet_ptr->coap_status == COAP_STATUS_PARSER_BLOCKWISE_MSG_RECEIVED && coap_packet_ptr->payload_ptr) { + handle->grs->sn_grs_free(coap_packet_ptr->payload_ptr); + coap_packet_ptr->payload_ptr = 0; + } + sn_coap_parser_release_allocated_coap_msg_mem(handle->grs->coap, coap_packet_ptr); + + return SN_NSDL_SUCCESS; +} + +/** + * \fn static sn_grs_resource_info_s *sn_grs_search_resource(struct grs_s *handle, const char *path, uint8_t search_method) + * + * \brief Searches given resource from linked list + * + * Search either precise path, or subresources, eg. dr/x -> returns dr/x/1, dr/x/2 etc... + * + * \param pathlen Length of the path to be search + * + * \param *path Pointer to the path string to be search + * + * \param search_method Search method, SEARCH or DELETE + * + * \return Pointer to the resource. If resource not found, return value is NULL + * +*/ + +sn_nsdl_dynamic_resource_parameters_s *sn_grs_search_resource(struct grs_s *handle, const char *path, uint8_t search_method) +{ + /* Local variables */ + char *path_temp_ptr = NULL; + /* Check parameters */ + if (!handle || !path) { + return NULL; + } + uint16_t pathlen = strlen(path); + /* Remove '/' - marks from the end and beginning */ + path_temp_ptr = sn_grs_convert_uri(&pathlen, path); + + /* Searchs exact path */ + if (search_method == SN_GRS_SEARCH_METHOD) { + /* Scan all nodes on list */ + ns_list_foreach(sn_nsdl_dynamic_resource_parameters_s, resource_search_temp, &handle->resource_root_list) { + /* If length equals.. */ + size_t len = 0; + if(resource_search_temp && + resource_search_temp->static_resource_parameters && + resource_search_temp->static_resource_parameters->path) { + len = strlen(resource_search_temp->static_resource_parameters->path); + } + + if (len == pathlen) { + /* Compare paths, If same return node pointer*/ + if (0 == memcmp(resource_search_temp->static_resource_parameters->path, + path_temp_ptr, + pathlen)) { + return resource_search_temp; + } + } + } + } + /* Search also subresources, eg. dr/x -> returns dr/x/1, dr/x/2 etc... */ + else if (search_method == SN_GRS_DELETE_METHOD) { + /* Scan all nodes on list */ + ns_list_foreach(sn_nsdl_dynamic_resource_parameters_s, resource_search_temp, &handle->resource_root_list) { + char *temp_path = resource_search_temp->static_resource_parameters->path; + if (strlen(resource_search_temp->static_resource_parameters->path) > pathlen && + (*(temp_path + (uint8_t)pathlen) == '/') && + 0 == memcmp(resource_search_temp->static_resource_parameters->path, + path_temp_ptr, + pathlen)) { + return resource_search_temp; + } + } + } + + /* If there was not nodes we wanted, return NULL */ + return NULL; +} + +/** + * \fn static uint8_t *sn_grs_convert_uri(uint16_t *uri_len, uint8_t *uri_ptr) + * + * \brief Removes '/' from the beginning and from the end of uri string + * + * \param *uri_len Pointer to the length of the path string + * + * \param *uri_ptr Pointer to the path string + * + * \return start pointer of the uri + * +*/ + +static char *sn_grs_convert_uri(uint16_t *uri_len, const char *uri_ptr) +{ + /* Local variables */ + char *uri_start_ptr = (char *) uri_ptr; + + /* If '/' in the beginning, update uri start pointer and uri len */ + if (*uri_ptr == '/') { + uri_start_ptr = (char *) uri_ptr + 1; + *uri_len = *uri_len - 1; + } + + /* If '/' at the end, update uri len */ + if (*(uri_start_ptr + *uri_len - 1) == '/') { + *uri_len = *uri_len - 1; + } + + /* Return start pointer */ + return uri_start_ptr; +} + +/** + * \fn static int8_t sn_grs_resource_info_free(sn_grs_resource_info_s *resource_ptr) + * + * \brief Frees resource info structure + * + * \param *resource_ptr Pointer to the resource + * + * \return 0 if success, -1 if failed + * +*/ +static int8_t sn_grs_resource_info_free(struct grs_s *handle, sn_nsdl_dynamic_resource_parameters_s *resource_ptr) +{ + if (resource_ptr) { +#ifdef MEMORY_OPTIMIZED_API + if (resource_ptr->free_on_delete) { + handle->sn_grs_free(resource_ptr); + } + return SN_NSDL_FAILURE; +#else + if (resource_ptr->static_resource_parameters && + resource_ptr->static_resource_parameters->free_on_delete) { +#ifndef RESOURCE_ATTRIBUTES_LIST +#ifndef DISABLE_INTERFACE_DESCRIPTION + if (resource_ptr->static_resource_parameters->interface_description_ptr) { + handle->sn_grs_free(resource_ptr->static_resource_parameters->interface_description_ptr); + resource_ptr->static_resource_parameters->interface_description_ptr = 0; + } +#endif +#ifndef DISABLE_RESOURCE_TYPE + if (resource_ptr->static_resource_parameters->resource_type_ptr) { + handle->sn_grs_free(resource_ptr->static_resource_parameters->resource_type_ptr); + resource_ptr->static_resource_parameters->resource_type_ptr = 0; + } +#endif +#else + sn_nsdl_free_resource_attributes_list(resource_ptr->static_resource_parameters); +#endif + if (resource_ptr->static_resource_parameters->path) { + handle->sn_grs_free(resource_ptr->static_resource_parameters->path); + resource_ptr->static_resource_parameters->path = 0; + } + + if (resource_ptr->resource) { + handle->sn_grs_free(resource_ptr->resource); + resource_ptr->resource = 0; + } + + handle->sn_grs_free(resource_ptr->static_resource_parameters); + resource_ptr->static_resource_parameters = 0; + } + if (resource_ptr->free_on_delete) { + handle->sn_grs_free(resource_ptr); + } + return SN_NSDL_SUCCESS; +#endif + } + return SN_NSDL_FAILURE; //Dead code? +} + +void sn_grs_mark_resources_as_registered(struct nsdl_s *handle) +{ + if( !handle ){ + return; + } + + sn_nsdl_dynamic_resource_parameters_s *temp_resource; + + temp_resource = sn_grs_get_first_resource(handle->grs); + + while (temp_resource) { + if (temp_resource->registered == SN_NDSL_RESOURCE_REGISTERING) { + temp_resource->registered = SN_NDSL_RESOURCE_REGISTERED; + } + temp_resource = sn_grs_get_next_resource(handle->grs, temp_resource); + } +}