mirror of https://github.com/ARMmbed/mbed-os.git
84 lines
2.8 KiB
C++
84 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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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 "DTLSSocketWrapper.h"
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#include "platform/Callback.h"
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#include "drivers/Timer.h"
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#include "events/mbed_events.h"
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#include "rtos/Kernel.h"
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#if defined(MBEDTLS_SSL_CLI_C)
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DTLSSocketWrapper::DTLSSocketWrapper(Socket *transport, const char *hostname, control_transport control) :
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TLSSocketWrapper(transport, hostname, control)
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{
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mbedtls_ssl_conf_transport(get_ssl_config(), MBEDTLS_SSL_TRANSPORT_DATAGRAM);
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// Defines MBEDTLS_SSL_CONF_SET_TIMER/GET_TIMER define global functions which should be the same for all
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// callers of mbedtls_ssl_set_timer_cb and there should be only one ssl context. If these rules don't apply,
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// these defines can't be used
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#if !defined(MBEDTLS_SSL_CONF_SET_TIMER) && !defined(MBEDTLS_SSL_CONF_GET_TIMER)
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mbedtls_ssl_set_timer_cb(get_ssl_context(), this, timing_set_delay, timing_get_delay);
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#endif /* !defined(MBEDTLS_SSL_CONF_SET_TIMER) && !defined(MBEDTLS_SSL_CONF_GET_TIMER) */
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}
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void DTLSSocketWrapper::timing_set_delay(void *ctx, uint32_t int_ms, uint32_t fin_ms)
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{
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DTLSSocketWrapper *context = static_cast<DTLSSocketWrapper *>(ctx);
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if (context->_timer_event_id) {
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mbed::mbed_event_queue()->cancel(context->_timer_event_id);
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context->_timer_expired = false;
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}
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if (fin_ms == 0) {
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context->_timer_event_id = 0;
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return;
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}
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auto int_duration = std::chrono::duration<uint32_t, std::milli>(int_ms);
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auto fin_duration = std::chrono::duration<uint32_t, std::milli>(fin_ms);
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context->_int_time = rtos::Kernel::Clock::now() + int_duration;
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context->_timer_event_id = mbed::mbed_event_queue()->call_in(fin_duration, context, &DTLSSocketWrapper::timer_event);
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}
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int DTLSSocketWrapper::timing_get_delay(void *ctx)
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{
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DTLSSocketWrapper *context = static_cast<DTLSSocketWrapper *>(ctx);
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/* See documentation of "typedef int mbedtls_ssl_get_timer_t( void * ctx );" from ssl.h */
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if (context->_timer_event_id == 0) {
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return -1;
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} else if (context->_timer_expired) {
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return 2;
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} else if (context->_int_time < rtos::Kernel::Clock::now()) {
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return 1;
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} else {
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return 0;
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}
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}
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void DTLSSocketWrapper::timer_event(void)
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{
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_timer_expired = true;
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event();
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}
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#endif /* MBEDTLS_SSL_CLI_C */
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