1SSL_ALLOC_BUFFERS(3)                OpenSSL               SSL_ALLOC_BUFFERS(3)
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NAME

6       SSL_free_buffers, SSL_alloc_buffers - manage SSL structure buffers
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SYNOPSIS

9        #include <openssl/ssl.h>
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11        int SSL_free_buffers(SSL *ssl);
12        int SSL_alloc_buffers(SSL *ssl);
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DESCRIPTION

15       SSL_free_buffers() frees the read and write buffers of the given ssl.
16       SSL_alloc_buffers() allocates the read and write buffers of the given
17       ssl.
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19       The SSL_MODE_RELEASE_BUFFERS mode releases read or write buffers
20       whenever the buffers have been drained. These functions allow
21       applications to manually control when buffers are freed and allocated.
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23       After freeing the buffers, the buffers are automatically reallocated
24       upon a new read or write. The SSL_alloc_buffers() does not need to be
25       called, but can be used to make sure the buffers are pre-allocated.
26       This can be used to avoid allocation during data processing or with
27       CRYPTO_set_mem_functions() to control where and how buffers are
28       allocated.
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RETURN VALUES

31       The following return values can occur:
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33       0 (Failure)
34           The SSL_free_buffers() function returns 0 when there is pending
35           data to be read or written. The SSL_alloc_buffers() function
36           returns 0 when there is an allocation failure.
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38       1 (Success)
39           The SSL_free_buffers() function returns 1 if the buffers have been
40           freed. This value is also returned if the buffers had been freed
41           before calling SSL_free_buffers().  The SSL_alloc_buffers()
42           function returns 1 if the buffers have been allocated.  This value
43           is also returned if the buffers had been allocated before calling
44           SSL_alloc_buffers().
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SEE ALSO

47       SSL_free(3), SSL_clear(3), SSL_new(3), SSL_CTX_set_mode(3),
48       CRYPTO_set_mem_functions
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51       Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
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53       Licensed under the OpenSSL license (the "License").  You may not use
54       this file except in compliance with the License.  You can obtain a copy
55       in the file LICENSE in the source distribution or at
56       <https://www.openssl.org/source/license.html>.
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601.1.1d                            2019-10-03              SSL_ALLOC_BUFFERS(3)
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