1=pod 2 3=head1 NAME 4 5SSL_SESSION_get0_hostname, 6SSL_SESSION_set1_hostname, 7SSL_SESSION_get0_alpn_selected, 8SSL_SESSION_set1_alpn_selected 9- get and set SNI and ALPN data associated with a session 10 11=head1 SYNOPSIS 12 13 #include <openssl/ssl.h> 14 15 const char *SSL_SESSION_get0_hostname(const SSL_SESSION *s); 16 int SSL_SESSION_set1_hostname(SSL_SESSION *s, const char *hostname); 17 18 void SSL_SESSION_get0_alpn_selected(const SSL_SESSION *s, 19 const unsigned char **alpn, 20 size_t *len); 21 int SSL_SESSION_set1_alpn_selected(SSL_SESSION *s, const unsigned char *alpn, 22 size_t len); 23 24=head1 DESCRIPTION 25 26SSL_SESSION_get0_hostname() retrieves the SNI value that was sent by the 27client when the session was created, or NULL if no value was sent. 28 29The value returned is a pointer to memory maintained within B<s> and 30should not be free'd. 31 32SSL_SESSION_set1_hostname() sets the SNI value for the hostname to a copy of 33the string provided in hostname. 34 35SSL_SESSION_get0_alpn_selected() retrieves the selected ALPN protocol for this 36session and its associated length in bytes. The returned value of B<*alpn> is a 37pointer to memory maintained within B<s> and should not be free'd. 38 39SSL_SESSION_set1_alpn_selected() sets the ALPN protocol for this session to the 40value in B<alpn> which should be of length B<len> bytes. A copy of the input 41value is made, and the caller retains ownership of the memory pointed to by 42B<alpn>. 43 44=head1 RETURN VALUES 45 46SSL_SESSION_get0_hostname() returns either a string or NULL based on if there 47is the SNI value sent by client. 48 49SSL_SESSION_set1_hostname() returns 1 on success or 0 on error. 50 51SSL_SESSION_set1_alpn_selected() returns 1 on success or 0 on error. 52 53=head1 SEE ALSO 54 55L<ssl(7)>, 56L<d2i_SSL_SESSION(3)>, 57L<SSL_SESSION_get_time(3)>, 58L<SSL_SESSION_free(3)> 59 60=head1 HISTORY 61 62The SSL_SESSION_set1_hostname(), SSL_SESSION_get0_alpn_selected() and 63SSL_SESSION_set1_alpn_selected() functions were added in OpenSSL 1.1.1. 64 65=head1 COPYRIGHT 66 67Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved. 68 69Licensed under the OpenSSL license (the "License"). You may not use 70this file except in compliance with the License. You can obtain a copy 71in the file LICENSE in the source distribution or at 72L<https://www.openssl.org/source/license.html>. 73 74=cut 75