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=pod
=head1 NAME
SSL_SESSION_get_ex_new_index, SSL_SESSION_set_ex_data, SSL_SESSION_get_ex_data - internal application specific data functions
=head1 SYNOPSIS
#include <openssl/ssl.h>
int SSL_SESSION_get_ex_new_index(long argl, void *argp,
CRYPTO_EX_new *new_func,
CRYPTO_EX_dup *dup_func,
CRYPTO_EX_free *free_func);
int SSL_SESSION_set_ex_data(SSL_SESSION *session, int idx, void *arg);
void *SSL_SESSION_get_ex_data(const SSL_SESSION *session, int idx);
typedef int new_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp);
typedef void free_func(void *parent, void *ptr, CRYPTO_EX_DATA *ad,
int idx, long argl, void *argp);
typedef int dup_func(CRYPTO_EX_DATA *to, CRYPTO_EX_DATA *from, void *from_d,
int idx, long argl, void *argp);
=head1 DESCRIPTION
Several OpenSSL structures can have application specific data attached to them.
These functions are used internally by OpenSSL to manipulate application
specific data attached to a specific structure.
SSL_SESSION_get_ex_new_index() is used to register a new index for application
specific data.
SSL_SESSION_set_ex_data() is used to store application data at B<arg> for B<idx>
into the B<session> object.
SSL_SESSION_get_ex_data() is used to retrieve the information for B<idx> from
B<session>.
A detailed description for the B<*_get_ex_new_index()> functionality
can be found in L<RSA_get_ex_new_index(3)|RSA_get_ex_new_index(3)>.
The B<*_get_ex_data()> and B<*_set_ex_data()> functionality is described in
L<CRYPTO_set_ex_data(3)|CRYPTO_set_ex_data(3)>.
=head1 WARNINGS
The application data is only maintained for sessions held in memory. The
application data is not included when dumping the session with
i2d_SSL_SESSION() (and all functions indirectly calling the dump functions
like PEM_write_SSL_SESSION() and PEM_write_bio_SSL_SESSION()) and can
therefore not be restored.
=head1 SEE ALSO
L<ssl(3)|ssl(3)>,
L<RSA_get_ex_new_index(3)|RSA_get_ex_new_index(3)>,
L<CRYPTO_set_ex_data(3)|CRYPTO_set_ex_data(3)>
=cut
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