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137 .IX Title "SSL_CTX_add_session 3"
138 .TH SSL_CTX_add_session 3 "2014-08-10" "1.0.1n" "OpenSSL"
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144 SSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session \- manipulate session cache
148 .IX Header "SYNOPSIS"
150 \& #include <openssl/ssl.h>
152 \& int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
153 \& int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c);
155 \& int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
156 \& int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
159 .IX Header "DESCRIPTION"
160 \&\fISSL_CTX_add_session()\fR adds the session \fBc\fR to the context \fBctx\fR. The
161 reference count for session \fBc\fR is incremented by 1. If a session with
162 the same session id already exists, the old session is removed by calling
163 \&\fISSL_SESSION_free\fR\|(3).
165 \&\fISSL_CTX_remove_session()\fR removes the session \fBc\fR from the context \fBctx\fR.
166 \&\fISSL_SESSION_free\fR\|(3) is called once for \fBc\fR.
168 \&\fISSL_add_session()\fR and \fISSL_remove_session()\fR are synonyms for their
169 SSL_CTX_*() counterparts.
172 When adding a new session to the internal session cache, it is examined
173 whether a session with the same session id already exists. In this case
174 it is assumed that both sessions are identical. If the same session is
175 stored in a different \s-1SSL_SESSION\s0 object, The old session is
176 removed and replaced by the new session. If the session is actually
177 identical (the \s-1SSL_SESSION\s0 object is identical), \fISSL_CTX_add_session()\fR
178 is a no-op, and the return value is 0.
180 If a server \s-1SSL_CTX\s0 is configured with the \s-1SSL_SESS_CACHE_NO_INTERNAL_STORE\s0
181 flag then the internal cache will not be populated automatically by new
182 sessions negotiated by the \s-1SSL/TLS\s0 implementation, even though the internal
183 cache will be searched automatically for session-resume requests (the
184 latter can be suppressed by \s-1SSL_SESS_CACHE_NO_INTERNAL_LOOKUP\s0). So the
185 application can use \fISSL_CTX_add_session()\fR directly to have full control
186 over the sessions that can be resumed if desired.
188 .IX Header "RETURN VALUES"
189 The following values are returned by all functions:
192 \& The operation failed. In case of the add operation, it was tried to add
193 \& the same (identical) session twice. In case of the remove operation, the
194 \& session was not found in the cache.
199 \& The operation succeeded.
202 .IX Header "SEE ALSO"
204 \&\fISSL_CTX_set_session_cache_mode\fR\|(3),
205 \&\fISSL_SESSION_free\fR\|(3)