1SSL_SESSION_GET0_HOSTNAME(3)        OpenSSL       SSL_SESSION_GET0_HOSTNAME(3)
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NAME

6       SSL_SESSION_get0_hostname, SSL_SESSION_set1_hostname,
7       SSL_SESSION_get0_alpn_selected, SSL_SESSION_set1_alpn_selected - get
8       and set SNI and ALPN data ssociated with a session
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SYNOPSIS

11        #include <openssl/ssl.h>
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13        const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s);
14        int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname);
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16        void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s,
17                                            const unsigned char **alpn,
18                                            size_t *len);
19        int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn,
20                                           size_t len);
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DESCRIPTION

23       SSL_SESSION_get0_hostname() retrieves the SNI value that was sent by
24       the client when the session was created, or NULL if no value was sent.
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26       The value returned is a pointer to memory maintained within s and
27       should not be free'd.
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29       SSL_SESSION_set1_hostname() sets the SNI value for the hostname to a
30       copy of the string provided in hostname.
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32       SSL_SESSION_get0_alpn_selected() retrieves the selected ALPN protocol
33       for this session and its associated length in bytes. The returned value
34       of *alpn is a pointer to memory maintained within s and should not be
35       free'd.
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37       SSL_SESSION_set1_alpn_selected() sets the ALPN protocol for this
38       session to the value in alpn which should be of length len bytes. A
39       copy of the input value is made, and the caller retains ownership of
40       the memory pointed to by alpn.
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RETURN VALUES

43       SSL_SESSION_get0_hostname() returns either a string or NULL based on if
44       there is the SNI value sent by client.
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46       SSL_SESSION_set1_hostname() returns 1 on success or 0 on error.
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48       SSL_SESSION_set1_alpn_selected() returns 1 on success or 0 on error.
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SEE ALSO

51       ssl(7), d2i_SSL_SESSION(3), SSL_SESSION_get_time(3),
52       SSL_SESSION_free(3)
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HISTORY

55       The SSL_SESSION_set1_hostname(), SSL_SESSION_get0_alpn_selected() and
56       SSL_SESSION_set1_alpn_selected() functions were added in OpenSSL 1.1.1.
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59       Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
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61       Licensed under the OpenSSL license (the "License").  You may not use
62       this file except in compliance with the License.  You can obtain a copy
63       in the file LICENSE in the source distribution or at
64       <https://www.openssl.org/source/license.html>.
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681.1.1c                            2019-05-28      SSL_SESSION_GET0_HOSTNAME(3)
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