5 SSL_CTX_set_read_ahead, SSL_CTX_get_read_ahead,
6 SSL_set_read_ahead, SSL_get_read_ahead,
7 SSL_CTX_get_default_read_ahead
8 - manage whether to read as many input bytes as possible
12 #include <openssl/ssl.h>
14 void SSL_set_read_ahead(SSL *s, int yes);
15 int SSL_get_read_ahead(const SSL *s);
17 SSL_CTX_set_read_ahead(SSL_CTX *ctx, int yes);
18 long SSL_CTX_get_read_ahead(SSL_CTX *ctx);
19 long SSL_CTX_get_default_read_ahead(SSL_CTX *ctx);
23 SSL_CTX_set_read_ahead() and SSL_set_read_ahead() set whether we should read as
24 many input bytes as possible (for non-blocking reads) or not. For example if
25 B<x> bytes are currently required by OpenSSL, but B<y> bytes are available from
26 the underlying BIO (where B<y> > B<x>), then OpenSSL will read all B<y> bytes
27 into its buffer (providing that the buffer is large enough) if reading ahead is
28 on, or B<x> bytes otherwise. The parameter B<yes> or B<m> should be 0 to ensure
29 reading ahead is off, or non zero otherwise.
30 SSL_CTX_set_default_read_ahead() is identical to SSL_CTX_set_read_ahead().
32 SSL_CTX_get_read_ahead() and SSL_get_read_ahead() indicate whether reading
33 ahead has been set or not.
37 These functions have no impact when used with DTLS. The return values for
38 SSL_CTX_get_read_head() and SSL_get_read_ahead() are undefined for DTLS. Setting
39 B<read_ahead> can impact the behaviour of the SSL_pending() function
40 (see L<SSL_pending(3)>).
44 SSL_get_read_ahead() and SSL_CTX_get_read_ahead() return 0 if reading ahead is off,
45 and non zero otherwise.
49 L<ssl(7)>, L<SSL_pending(3)>
53 Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
55 Licensed under the OpenSSL license (the "License"). You may not use
56 this file except in compliance with the License. You can obtain a copy
57 in the file LICENSE in the source distribution or at
58 L<https://www.openssl.org/source/license.html>.