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diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/include/mbedtls/ssl_cache.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/include/mbedtls/ssl_cache.h
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+++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/mbedtls/include/mbedtls/ssl_cache.h
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+/**
+ * \file ssl_cache.h
+ *
+ * \brief SSL session cache implementation
+ *
+ * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is part of mbed TLS (https://tls.mbed.org)
+ */
+#ifndef MBEDTLS_SSL_CACHE_H
+#define MBEDTLS_SSL_CACHE_H
+
+#include "ssl.h"
+
+#if defined(MBEDTLS_THREADING_C)
+#include "threading.h"
+#endif
+
+/**
+ * \name SECTION: Module settings
+ *
+ * The configuration options you can set for this module are in this section.
+ * Either change them in config.h or define them on the compiler command line.
+ * \{
+ */
+
+#if !defined(MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT)
+#define MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT 86400 /*!< 1 day */
+#endif
+
+#if !defined(MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES)
+#define MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES 50 /*!< Maximum entries in cache */
+#endif
+
+/* \} name SECTION: Module settings */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct mbedtls_ssl_cache_context mbedtls_ssl_cache_context;
+typedef struct mbedtls_ssl_cache_entry mbedtls_ssl_cache_entry;
+
+/**
+ * \brief This structure is used for storing cache entries
+ */
+struct mbedtls_ssl_cache_entry
+{
+#if defined(MBEDTLS_HAVE_TIME)
+ mbedtls_time_t timestamp; /*!< entry timestamp */
+#endif
+ mbedtls_ssl_session session; /*!< entry session */
+#if defined(MBEDTLS_X509_CRT_PARSE_C)
+ mbedtls_x509_buf peer_cert; /*!< entry peer_cert */
+#endif
+ mbedtls_ssl_cache_entry *next; /*!< chain pointer */
+};
+
+/**
+ * \brief Cache context
+ */
+struct mbedtls_ssl_cache_context
+{
+ mbedtls_ssl_cache_entry *chain; /*!< start of the chain */
+ int timeout; /*!< cache entry timeout */
+ int max_entries; /*!< maximum entries */
+#if defined(MBEDTLS_THREADING_C)
+ mbedtls_threading_mutex_t mutex; /*!< mutex */
+#endif
+};
+
+/**
+ * \brief Initialize an SSL cache context
+ *
+ * \param cache SSL cache context
+ */
+void mbedtls_ssl_cache_init( mbedtls_ssl_cache_context *cache );
+
+/**
+ * \brief Cache get callback implementation
+ * (Thread-safe if MBEDTLS_THREADING_C is enabled)
+ *
+ * \param data SSL cache context
+ * \param session session to retrieve entry for
+ */
+int mbedtls_ssl_cache_get( void *data, mbedtls_ssl_session *session );
+
+/**
+ * \brief Cache set callback implementation
+ * (Thread-safe if MBEDTLS_THREADING_C is enabled)
+ *
+ * \param data SSL cache context
+ * \param session session to store entry for
+ */
+int mbedtls_ssl_cache_set( void *data, const mbedtls_ssl_session *session );
+
+#if defined(MBEDTLS_HAVE_TIME)
+/**
+ * \brief Set the cache timeout
+ * (Default: MBEDTLS_SSL_CACHE_DEFAULT_TIMEOUT (1 day))
+ *
+ * A timeout of 0 indicates no timeout.
+ *
+ * \param cache SSL cache context
+ * \param timeout cache entry timeout in seconds
+ */
+void mbedtls_ssl_cache_set_timeout( mbedtls_ssl_cache_context *cache, int timeout );
+#endif /* MBEDTLS_HAVE_TIME */
+
+/**
+ * \brief Set the maximum number of cache entries
+ * (Default: MBEDTLS_SSL_CACHE_DEFAULT_MAX_ENTRIES (50))
+ *
+ * \param cache SSL cache context
+ * \param max cache entry maximum
+ */
+void mbedtls_ssl_cache_set_max_entries( mbedtls_ssl_cache_context *cache, int max );
+
+/**
+ * \brief Free referenced items in a cache context and clear memory
+ *
+ * \param cache SSL cache context
+ */
+void mbedtls_ssl_cache_free( mbedtls_ssl_cache_context *cache );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ssl_cache.h */