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132 .\" ========================================================================
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134 .IX Title "SSL_CTX_flush_sessions 3"
135 .TH SSL_CTX_flush_sessions 3 "2009-04-11" "0.9.8k" "OpenSSL"
136 .\" For nroff, turn off justification. Always turn off hyphenation; it makes
137 .\" way too many mistakes in technical documents.
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140 .SH "NAME"
141 SSL_CTX_flush_sessions, SSL_flush_sessions \- remove expired sessions
142 .SH "SYNOPSIS"
143 .IX Header "SYNOPSIS"
144 .Vb 1
145 \& #include <openssl/ssl.h>
146 \&
147 \& void SSL_CTX_flush_sessions(SSL_CTX *ctx, long tm);
148 \& void SSL_flush_sessions(SSL_CTX *ctx, long tm);
149 .Ve
150 .SH "DESCRIPTION"
151 .IX Header "DESCRIPTION"
152 \&\fISSL_CTX_flush_sessions()\fR causes a run through the session cache of
153 \&\fBctx\fR to remove sessions expired at time \fBtm\fR.
154 .PP
155 \&\fISSL_flush_sessions()\fR is a synonym for \fISSL_CTX_flush_sessions()\fR.
156 .SH "NOTES"
157 .IX Header "NOTES"
158 If enabled, the internal session cache will collect all sessions established
159 up to the specified maximum number (see \fISSL_CTX_sess_set_cache_size()\fR).
160 As sessions will not be reused ones they are expired, they should be
161 removed from the cache to save resources. This can either be done
162 automatically whenever 255 new sessions were established (see
163 \&\fISSL_CTX_set_session_cache_mode\fR\|(3))
164 or manually by calling \fISSL_CTX_flush_sessions()\fR.
165 .PP
166 The parameter \fBtm\fR specifies the time which should be used for the
167 expiration test, in most cases the actual time given by \fItime\fR\|(0)
168 will be used.
169 .PP
170 \&\fISSL_CTX_flush_sessions()\fR will only check sessions stored in the internal
171 cache. When a session is found and removed, the remove_session_cb is however
172 called to synchronize with the external cache (see
173 \&\fISSL_CTX_sess_set_get_cb\fR\|(3)).
174 .SH "RETURN VALUES"
175 .IX Header "RETURN VALUES"
176 .SH "SEE ALSO"
177 .IX Header "SEE ALSO"
178 \&\fIssl\fR\|(3),
179 \&\fISSL_CTX_set_session_cache_mode\fR\|(3),
180 \&\fISSL_CTX_set_timeout\fR\|(3),
181 \&\fISSL_CTX_sess_set_get_cb\fR\|(3)