85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "chpp/services/timesync.h"
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "chpp/app.h"
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#include "chpp/common/timesync.h"
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#include "chpp/log.h"
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#include "chpp/macros.h"
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#include "chpp/services.h"
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#include "chpp/time.h"
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#include "chpp/transport.h"
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/**
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* Processes the GetTime (0x0001) request and responds with the time as on the
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* service. This should be the same clock used to timestamp any data samples
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* provided to CHPP.
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*
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* @param context Maintains status for each app layer instance.
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* @param buf Input data. Cannot be null.
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* @param len Length of input data in bytes.
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*/
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static void chppTimesyncGetTime(struct ChppAppState *context,
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const uint8_t *buf, size_t len) {
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UNUSED_VAR(len);
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const struct ChppAppHeader *requestHeader = (const struct ChppAppHeader *)buf;
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struct ChppTimesyncResponse *response =
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chppAllocServiceResponseFixed(requestHeader, struct ChppTimesyncResponse);
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size_t responseLen = sizeof(*response);
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if (response == NULL) {
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CHPP_LOG_OOM();
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CHPP_DEBUG_ASSERT(false);
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} else {
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response->timeNs = chppGetCurrentTimeNs();
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CHPP_LOGD("chppTimesyncGetTime returning %" PRIuSIZE
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" bytes at time=%" PRIu64,
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responseLen, response->timeNs / CHPP_NSEC_PER_MSEC);
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chppEnqueueTxDatagramOrFail(context->transportContext, response,
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responseLen);
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}
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}
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/************************************************
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* Public Functions
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***********************************************/
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bool chppDispatchTimesyncClientRequest(struct ChppAppState *context,
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const uint8_t *buf, size_t len) {
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UNUSED_VAR(len);
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const struct ChppAppHeader *rxHeader = (const struct ChppAppHeader *)buf;
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bool success = true;
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switch (rxHeader->command) {
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case CHPP_TIMESYNC_COMMAND_GETTIME: {
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chppTimesyncGetTime(context, buf, len);
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break;
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}
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default: {
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success = false;
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}
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}
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return success;
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}
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