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134 .\" ========================================================================
136 .IX Title "SSL_CTX_add_session 3"
137 .TH SSL_CTX_add_session 3 "2002-10-28" "1.1.0-dev" "OpenSSL"
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143 SSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session \- manipulate session cache
147 .IX Header "SYNOPSIS"
149 \& #include <openssl/ssl.h>
151 \& int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
152 \& int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c);
154 \& int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
155 \& int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
158 .IX Header "DESCRIPTION"
159 \&\fISSL_CTX_add_session()\fR adds the session \fBc\fR to the context \fBctx\fR. The
160 reference count for session \fBc\fR is incremented by 1. If a session with
161 the same session id already exists, the old session is removed by calling
162 \&\fISSL_SESSION_free\fR\|(3).
164 \&\fISSL_CTX_remove_session()\fR removes the session \fBc\fR from the context \fBctx\fR.
165 \&\fISSL_SESSION_free\fR\|(3) is called once for \fBc\fR.
167 \&\fISSL_add_session()\fR and \fISSL_remove_session()\fR are synonyms for their
168 SSL_CTX_*() counterparts.
171 When adding a new session to the internal session cache, it is examined
172 whether a session with the same session id already exists. In this case
173 it is assumed that both sessions are identical. If the same session is
174 stored in a different \s-1SSL_SESSION\s0 object, The old session is
175 removed and replaced by the new session. If the session is actually
176 identical (the \s-1SSL_SESSION\s0 object is identical), \fISSL_CTX_add_session()\fR
177 is a no-op, and the return value is 0.
179 If a server \s-1SSL_CTX\s0 is configured with the \s-1SSL_SESS_CACHE_NO_INTERNAL_STORE\s0
180 flag then the internal cache will not be populated automatically by new
181 sessions negotiated by the \s-1SSL/TLS\s0 implementation, even though the internal
182 cache will be searched automatically for session-resume requests (the
183 latter can be surpressed by \s-1SSL_SESS_CACHE_NO_INTERNAL_LOOKUP\s0). So the
184 application can use \fISSL_CTX_add_session()\fR directly to have full control
185 over the sessions that can be resumed if desired.
187 .IX Header "RETURN VALUES"
188 The following values are returned by all functions:
191 \& The operation failed. In case of the add operation, it was tried to add
192 \& the same (identical) session twice. In case of the remove operation, the
193 \& session was not found in the cache.
198 \& The operation succeeded.
201 .IX Header "SEE ALSO"
203 \&\fISSL_CTX_set_session_cache_mode\fR\|(3),
204 \&\fISSL_SESSION_free\fR\|(3)