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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/coap/coap_observe.h')
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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/coap/coap_observe.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/coap/coap_observe.h new file mode 100644 index 0000000..bb72b89 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/iot/coap/coap_observe.h @@ -0,0 +1,248 @@ +/** + * Copyright (c) 2015 - 2018, 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_observe.h + * + * @defgroup iot_sdk_coap_observe CoAP Observe + * @ingroup iot_sdk_coap + * @{ + * @brief Internal API of Nordic's CoAP Observe implementation. + */ +#ifndef COAP_OBSERVE_H__ +#define COAP_OBSERVE_H__ + +#include <stdint.h> + +#include "coap_observe_api.h" +#include "coap_api.h" +#include "coap_queue.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/**@cond NO_DOXYGEN */ + +/**@brief Register a new observer. + * + * @param[out] p_handle Handle to the observer instance registered. Returned by reference. + * Should not be NULL. + * @param[in] p_observer Pointer to the observer structure to register. The data will be + * copied. Should not be NULL. + * + * @retval NRF_SUCCESS If the observer was registered successfully. + * @retval NRF_ERROR_NO_MEM If the observer could not be added to the list. + * @retval NRF_ERROR_NULL If one of the parameters is a NULL pointer. + */ +uint32_t internal_coap_observe_server_register(uint32_t * p_handle, coap_observer_t * p_observer); + +/**@brief Unregister an observer. + * + * @details Unregister the observer and clear the memory used by this instance. + * + * @param[in] handle Handle to the observer instance registered. + * + * @retval NRF_SUCCESS If the observer was successfully unregistered. + * @retval NRF_ERROR_NOT_FOUND If the given handle was not found in the observer list. + */ +uint32_t internal_coap_observe_server_unregister(uint32_t handle); + +/**@brief Search the observer list for an observer matching remote address and subject given. + * + * @param[out] p_handle Handle to the observer instance registered. Returned by reference. + * Should not be NULL. + * @param[in] p_observer_addr Pointer to an address structure giving remote address of the observer and port number. + * Should not be NULL. + * @param[in] p_resource Pointer to the resource the observer is registered to. Should not be NULL. + * + * @retval NRF_SUCCESS If observer was found in the observer list. + * @retval NRF_ERROR_NULL If one of the pointers are NULL. + * @retval NRF_ERROR_NOT_FOUND If observer was not found. + */ +uint32_t internal_coap_observe_server_search(uint32_t * p_handle, coap_remote_t * p_observer_addr, coap_resource_t * p_resource); + +/**@brief Iterate through observers subscribing to a specific resource. + * + * @param[out] pp_observer Pointer to be filled by the search function upon finding the next observer starting from + * from the p_observer pointer provided. Should not be NULL. + * @param[in] p_observer Pointer to the observer where to start the search. + * @param[in] p_resource Pointer to the resource of interest. Should not be NULL. + * + * @retval NRF_SUCCESS If observer was found. + * @retval NRF_ERROR_NULL If pp_observer or p_resource pointer is NULL. + * @retval NRF_ERROR_NOT_FOUND If next observer was not found. + */ +uint32_t internal_coap_observe_server_next_get(coap_observer_t ** pp_observer, coap_observer_t * p_observer, coap_resource_t * p_resource); + +/**@brief Retrieve the observer based on handle. + * + * @param[in] handle Handle to the coap_observer_t instance. + * @param[out] pp_observer Pointer to an observer return by reference. + * Should not be NULL. + * + * @retval NRF_SUCCESS If observer was found in the observer list. + * @retval NRF_ERROR_NULL If pp_observer pointer is NULL. + * @retval NRF_ERROR_NOT_FOUND If observer associated with the handle was not found. + */ +uint32_t internal_coap_observe_server_get(uint32_t handle, coap_observer_t ** pp_observer); + +/**@brief Register a new observable resource. + * + * @param[out] p_handle Handle to the observable resource instance registered. Returned by + * reference. Should not be NULL. + * @param[in] p_observable Pointer to a observable resource structure to register. The structure + * will be copied. Should not be NULL. + * + * @retval NRF_SUCCESS If the observable resource was registered successfully. + * @retval NRF_ERROR_NO_MEM If the observable resource could not be added to the list. + * @retval NRF_ERROR_NULL If one of the parameters is a NULL pointer. + */ +uint32_t internal_coap_observe_client_register(uint32_t * p_handle, coap_observable_t * p_observable); + +/**@brief Unregister an observable resource. + * + * @details Unregister the observable resource and clear the memory used by this instance. + * + * @param[in] handle Handle to the observable resource instance registered. + * + * @retval NRF_SUCCESS If the observable resource was successfully unregistered. + * @retval NRF_ERROR_NOT_FOUND If the given handle was not found in the observable + * resource list. + */ +uint32_t internal_coap_observe_client_unregister(uint32_t handle); + +/**@brief Search for a observable resource instance by token. + * + * @param[out] p_handle Handle to the observable resource instance registered. Returned by + * reference. Should not be NULL. + * @param[in] p_token Pointer to the byte array holding the token id. Should not be NULL. + * @param[in] token_len Length of the token. + * + * @retval NRF_SUCCESS If observable resource was found in the observable + * resource list. + * @retval NRF_ERROR_NULL If one of the pointers are NULL. + * @retval NRF_ERROR_NOT_FOUND If observable resource was not found in the observable + * resource list. + */ +uint32_t internal_coap_observe_client_search(uint32_t * p_handle, uint8_t * p_token, uint16_t token_len); + +/**@brief Retrieve the observable resource based on handle. + * + * @param[in] handle Handle to the coap_observable_t instance. + * @param[out] pp_observable Pointer to an observable resource return by reference. + * Should not be NULL. + * + * @retval NRF_SUCCESS If observable resource was found in the observable + * resource list. + * @retval NRF_ERROR_NULL If pp_observable pointer is NULL. + * @retval NRF_ERROR_NOT_FOUND If observable resource associated with the handle + * was not found. + */ +uint32_t internal_coap_observe_client_get(uint32_t handle, coap_observable_t ** pp_observable); + +/**@brief Iterate through observable resources. + * + * @param[out] pp_observable Pointer to be filled by the search function upon finding the next + * observable resource starting from from the pointer provided. + * Should not be NULL. + * @param[out] p_handle Handler to the observable resource found returned by reference. Should + * not be NULL. + * @param[in] p_observable Pointer to the observable resource where to start the search. + * + * @retval NRF_SUCCESS If observer was found. + * @retval NRF_ERROR_NULL If pp_observer or p_observer pointer is NULL. + * @retval NRF_ERROR_NOT_FOUND If next observer was not found. + */ +uint32_t internal_coap_observe_client_next_get(coap_observable_t ** pp_observable, uint32_t * p_handle, coap_observable_t * p_observable); + + +#if (COAP_ENABLE_OBSERVE_SERVER == 1) || (COAP_ENABLE_OBSERVE_CLIENT == 1) + +/**@brief Internal function to initilize observer (client) and observable (server) lists. + * + * @retval NRF_SUCCESS If initialization was successful. + */ +void internal_coap_observe_init(void); + +#else // COAP_ENABLE_OBSERVE_SERVER || COAP_ENABLE_OBSERVE_CLIENT + +#define internal_coap_observe_init(...) + +#endif // COAP_ENABLE_OBSERVE_SERVER || COAP_ENABLE_OBSERVE_CLIENT + +#if (COAP_ENABLE_OBSERVE_CLIENT == 1) + +/**@brief Observe client function to be run when sending requests. + * + * @details The function will peek into the outgoing messages to see if any actions regarding + * subscription to observable resources has to be done. + * + * @param[in] p_request Pointer to the outgoing request. + */ +void coap_observe_client_send_handle(coap_message_t * p_request); + +/**@brief Observe client function to be run when response message has been received. + * + * @details The function will register and unregister observable resources based on the received + * response messages. Upon a notification max-age values will be updated, and the correct + * response callback will be called. If a notification is terminated by the peer, the function + * will automatically terminate the subscription from the client by unregistering the + * observable resource. + * + * @param[in] p_response Pointer to the response message received. + * @param[in] p_item Pointer to the queued element of the outgoing request. + */ +void coap_observe_client_response_handle(coap_message_t * p_response, coap_queue_item_t * p_item); + +#else // COAP_ENABLE_OBSERVE_CLIENT + +#define coap_observe_client_send_handle(...) +#define coap_observe_client_response_handle(...) + +#endif // COAP_ENABLE_OBSERVE_CLIENT + +/**@endcond */ + +#ifdef __cplusplus +} +#endif + +#endif // COAP_OBSERVE_H__ + +/** @} */ |