/** * Copyright (c) 2014 - 2019, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ /** @file coap_queue.h * * @defgroup iot_sdk_coap_queue CoAP Message Queue * @ingroup iot_sdk_coap * @{ * @brief TODO. */ #ifndef COAP_QUEUE_H__ #define COAP_QUEUE_H__ #include #include "coap_transport.h" #include "coap_message.h" #ifdef __cplusplus extern "C" { #endif typedef struct { void * p_arg; /**< Miscellaneous pointer to application provided data that is associated with the message. Copied from the coap_message_t when creating the item. */ uint32_t handle; /**< Quick reference to the handle value of the current item. */ uint16_t mid; /**< Message ID. */ uint8_t token_len; /**< Message Token length. */ uint8_t token[8]; /**< Message Token value up to 8 bytes. */ uint8_t retrans_count; /**< Re-transmission attempt count. */ uint16_t timeout; /**< Time until new re-transmission attempt. */ uint16_t timeout_val; /**< Last timeout value used. */ coap_port_t port; /**< Source port to use when re-transmitting. */ uint8_t * p_buffer; /**< Pointer to the data buffer containing the encoded CoAP message. */ uint32_t buffer_len; /**< Size of the data buffer containing the encoded CoAP message. */ coap_remote_t remote; /**< Destination address and port number to the remote. */ coap_response_callback_t callback; /**< Callback function to be called upon response or transmission timeout. */ } coap_queue_item_t; /**@brief Initilize the CoAP message queue. * * @retval NRF_SUCCESS If initialization completed successfully. */ uint32_t coap_queue_init(void); /**@brief Add item to the queue. * * @param[in] p_item Pointer to an item which to add to the queue. The function will copy all * data provided. * * @retval NRF_SUCCESS If adding the item was successful. * @retval NRF_ERROR_NO_MEM If max number of queued elements has been reached. This is * configured by COAP_MESSAGE_QUEUE_SIZE in sdk_config.h. * @retval NRF_ERROR_DATA_SIZE If the element could not be added. */ uint32_t coap_queue_add(coap_queue_item_t * p_item); /**@brief Remove item from the queue. * * @param[in] p_item Pointer to an item which to remove from the queue. Should not be NULL. * * @retval NRF_SUCCESS If the item was successfully removed from the queue. * @retval NRF_ERROR_NULL If p_item pointer is NULL. * @retval NRF_ERROR_NOT_FOUND If the item was not located in the queue. */ uint32_t coap_queue_remove(coap_queue_item_t * p_item); /**@brief Search for item by token. * * @details Search the items for any item matching the token. * * @param[out] pp_item Pointer to be filled by the function if item matching the token * has been found. Should not be NULL. * @param[in] p_token Pointer to token array to be matched. * @param[in] token_len Length of the token to be matched. * * @retval NRF_SUCCESS If an item was successfully located. * @retval NRF_ERROR_NULL If pp_item pointer is NULL. * @retval NRF_ERROR_NOT_FOUND If no item was found. */ uint32_t coap_queue_item_by_token_get(coap_queue_item_t ** pp_item, uint8_t * p_token, uint8_t token_len); /**@brief Search for item by message id. * * @details Search the items for any item matching the message id. * * @param[out] pp_item Pointer to be filled by the funciton if item matching the message id * has been found. Should not be NULL. * @param[in] message_id Message id to be matched. * * @retval NRF_SUCCESS If an item was successfully located. * @retval NRF_ERROR_NULL If pp_item pointer is NULL. * @retval NRF_ERROR_NOT_FOUND If no item was found. */ uint32_t coap_queue_item_by_mid_get(coap_queue_item_t ** pp_item, uint16_t message_id); /**@brief Iterate through items. * * @param[out] pp_item Pointer to be filled by the search function upon finding the next * queued item starting from the p_item pointer provided. Should * not be NULL. * @param[in] p_item Pointer to the item where to start the search. * * @retval NRF_SUCCESS If item was found. * @retval NRF_ERROR_NULL If pp_item pointer is NULL. * @retval NRF_ERROR_NOT_FOUND If next item was not found. */ uint32_t coap_queue_item_next_get(coap_queue_item_t ** pp_item, coap_queue_item_t * p_item); #ifdef __cplusplus } #endif #endif // COAP_QUEUE_H__ /** @} */