1=pod 2 3=head1 NAME 4 5SSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session - manipulate session cache 6 7=head1 SYNOPSIS 8 9 #include <openssl/ssl.h> 10 11 int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c); 12 int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c); 13 14 int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c); 15 int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c); 16 17=head1 DESCRIPTION 18 19SSL_CTX_add_session() adds the session B<c> to the context B<ctx>. The 20reference count for session B<c> is incremented by 1. If a session with 21the same session id already exists, the old session is removed by calling 22L<SSL_SESSION_free(3)|SSL_SESSION_free(3)>. 23 24SSL_CTX_remove_session() removes the session B<c> from the context B<ctx>. 25L<SSL_SESSION_free(3)|SSL_SESSION_free(3)> is called once for B<c>. 26 27SSL_add_session() and SSL_remove_session() are synonyms for their 28SSL_CTX_*() counterparts. 29 30=head1 NOTES 31 32When adding a new session to the internal session cache, it is examined 33whether a session with the same session id already exists. In this case 34it is assumed that both sessions are identical. If the same session is 35stored in a different SSL_SESSION object, The old session is 36removed and replaced by the new session. If the session is actually 37identical (the SSL_SESSION object is identical), SSL_CTX_add_session() 38is a no-op, and the return value is 0. 39 40If a server SSL_CTX is configured with the SSL_SESS_CACHE_NO_INTERNAL_STORE 41flag then the internal cache will not be populated automatically by new 42sessions negotiated by the SSL/TLS implementation, even though the internal 43cache will be searched automatically for session-resume requests (the 44latter can be surpressed by SSL_SESS_CACHE_NO_INTERNAL_LOOKUP). So the 45application can use SSL_CTX_add_session() directly to have full control 46over the sessions that can be resumed if desired. 47 48 49=head1 RETURN VALUES 50 51The following values are returned by all functions: 52 53=over 4 54 55=item 0 56 57 The operation failed. In case of the add operation, it was tried to add 58 the same (identical) session twice. In case of the remove operation, the 59 session was not found in the cache. 60 61=item 1 62 63 The operation succeeded. 64 65=back 66 67=head1 SEE ALSO 68 69L<ssl(3)|ssl(3)>, 70L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>, 71L<SSL_SESSION_free(3)|SSL_SESSION_free(3)> 72 73=cut 74