121 lines
4.1 KiB
C
121 lines
4.1 KiB
C
/*
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* Copyright Runtime.io 2018. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef H_ZEPHYR_SMP_
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#define H_ZEPHYR_SMP_
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct zephyr_smp_transport;
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struct net_buf;
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/** @typedef zephyr_smp_transport_out_fn
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* @brief SMP transmit function for Zephyr.
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*
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* The supplied net_buf is always consumed, regardless of return code.
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*
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* @param mst The transport to send via.
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* @param nb The net_buf to transmit.
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*
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* @return 0 on success, MGMT_ERR_[...] code on failure.
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*/
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typedef int zephyr_smp_transport_out_fn(struct zephyr_smp_transport *zst,
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struct net_buf *nb);
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/** @typedef zephyr_smp_transport_get_mtu_fn
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* @brief SMP MTU query function for Zephyr.
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*
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* The supplied net_buf should contain a request received from the peer whose
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* MTU is being queried. This function takes a net_buf parameter because some
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* transports store connection-specific information in the net_buf user header
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* (e.g., the BLE transport stores the peer address).
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*
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* @param nb Contains a request from the relevant peer.
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*
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* @return The transport's MTU;
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* 0 if transmission is currently not possible.
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*/
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typedef uint16_t zephyr_smp_transport_get_mtu_fn(const struct net_buf *nb);
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/** @typedef zephyr_smp_transport_ud_copy_fn
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* @brief SMP copy buffer user_data function for Zephyr.
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*
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* The supplied src net_buf should contain a user_data that cannot be copied
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* using regular memcpy function (e.g., the BLE transport net_buf user_data
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* stores the connection reference that has to be incremented when is going
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* to be used by another buffer).
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*
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* @param dst Source buffer user_data pointer.
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* @param src Destination buffer user_data pointer.
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*
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* @return 0 on success, MGMT_ERR_[...] code on failure.
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*/
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typedef int zephyr_smp_transport_ud_copy_fn(struct net_buf *dst,
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const struct net_buf *src);
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/** @typedef zephyr_smp_transport_ud_free_fn
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* @brief SMP free buffer user_data function for Zephyr.
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*
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* This function frees net_buf user data, because some transports store
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* connection-specific information in the net_buf user data (e.g., the BLE
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* transport stores the connection reference that has to be decreased).
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*
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* @param nb Contains a user_data pointer to be freed.
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*/
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typedef void zephyr_smp_transport_ud_free_fn(void *ud);
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/**
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* @brief Provides Zephyr-specific functionality for sending SMP responses.
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*/
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struct zephyr_smp_transport {
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/* Must be the first member. */
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struct k_work zst_work;
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/* FIFO containing incoming requests to be processed. */
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struct k_fifo zst_fifo;
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zephyr_smp_transport_out_fn *zst_output;
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zephyr_smp_transport_get_mtu_fn *zst_get_mtu;
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zephyr_smp_transport_ud_copy_fn *zst_ud_copy;
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zephyr_smp_transport_ud_free_fn *zst_ud_free;
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};
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/**
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* @brief Initializes a Zephyr SMP transport object.
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*
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* @param zst The transport to construct.
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* @param output_func The transport's send function.
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* @param get_mtu_func The transport's get-MTU function.
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* @param ud_copy_func The transport buffer user_data copy function.
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* @param ud_free_func The transport buffer user_data free function.
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*
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* @return 0 on success, MGMT_ERR_[...] code on failure.
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*/
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void zephyr_smp_transport_init(struct zephyr_smp_transport *zst,
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zephyr_smp_transport_out_fn *output_func,
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zephyr_smp_transport_get_mtu_fn *get_mtu_func,
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zephyr_smp_transport_ud_copy_fn *ud_copy_func,
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zephyr_smp_transport_ud_free_fn *ud_free_func);
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/**
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* @brief Enqueues an incoming SMP request packet for processing.
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*
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* This function always consumes the supplied net_buf.
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*
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* @param zst The transport to use to send the corresponding
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* response(s).
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* @param nb The request packet to process.
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*/
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void zephyr_smp_rx_req(struct zephyr_smp_transport *zst, struct net_buf *nb);
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#ifdef __cplusplus
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}
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#endif
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#endif
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