92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/**
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* @file
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* @brief SMP - Simple Management Protocol.
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*
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* SMP is a basic protocol that sits on top of the mgmt layer. SMP requests
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* and responses have the following format:
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*
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* [Offset 0]: Mgmt header
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* [Offset 8]: CBOR map of command-specific key-value pairs.
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*
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* SMP request packets may contain multiple concatenated requests. Each
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* request must start at an offset that is a multiple of 4, so padding should
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* be inserted between requests as necessary. Requests are processed
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* sequentially from the start of the packet to the end. Each response is sent
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* individually in its own packet. If a request elicits an error response,
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* processing of the packet is aborted.
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*/
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#ifndef H_SMP_
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#define H_SMP_
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#include "mgmt/mgmt.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct smp_streamer;
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struct mgmt_hdr;
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/** @typedef smp_tx_rsp_fn
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* @brief Transmits an SMP response packet.
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*
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* @param ss The streamer to transmit via.
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* @param buf Buffer containing the response packet.
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* @param arg Optional streamer argument.
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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 smp_tx_rsp_fn(struct smp_streamer *ss, void *buf, void *arg);
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/**
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* @brief Decodes, encodes, and transmits SMP packets.
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*/
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struct smp_streamer {
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struct mgmt_streamer mgmt_stmr;
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smp_tx_rsp_fn *tx_rsp_cb;
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};
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/**
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* @brief Processes a single SMP request packet and sends all corresponding
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* responses.
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*
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* Processes all SMP requests in an incoming packet. Requests are processed
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* sequentially from the start of the packet to the end. Each response is sent
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* individually in its own packet. If a request elicits an error response,
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* processing of the packet is aborted. This function consumes the supplied
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* request buffer regardless of the outcome.
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*
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* @param streamer The streamer providing the required SMP
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* callbacks.
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* @param req The request packet to process.
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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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int smp_process_request_packet(struct smp_streamer *streamer, void *req);
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#ifdef __cplusplus
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}
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#endif
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#endif /* H_SMP_ */
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