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.\" ========================================================================
.\"
.IX Title "SSL_CTX_add_session 3"
.TH SSL_CTX_add_session 3 "2009-06-14" "0.9.8k" "OpenSSL"
.SH "NAME"
SSL_CTX_add_session, SSL_add_session, SSL_CTX_remove_session, SSL_remove_session \- manipulate session cache
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ssl.h>
.Ve
.PP
.Vb 2
\& int SSL_CTX_add_session(SSL_CTX *ctx, SSL_SESSION *c);
\& int SSL_add_session(SSL_CTX *ctx, SSL_SESSION *c);
.Ve
.PP
.Vb 2
\& int SSL_CTX_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
\& int SSL_remove_session(SSL_CTX *ctx, SSL_SESSION *c);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fISSL_CTX_add_session()\fR adds the session \fBc\fR to the context \fBctx\fR. The
reference count for session \fBc\fR is incremented by 1. If a session with
the same session id already exists, the old session is removed by calling
\&\fISSL_SESSION_free\fR\|(3).
.PP
\&\fISSL_CTX_remove_session()\fR removes the session \fBc\fR from the context \fBctx\fR.
\&\fISSL_SESSION_free\fR\|(3) is called once for \fBc\fR.
.PP
\&\fISSL_add_session()\fR and \fISSL_remove_session()\fR are synonyms for their
SSL_CTX_*() counterparts.
.SH "NOTES"
.IX Header "NOTES"
When adding a new session to the internal session cache, it is examined
whether a session with the same session id already exists. In this case
it is assumed that both sessions are identical. If the same session is
stored in a different \s-1SSL_SESSION\s0 object, The old session is
removed and replaced by the new session. If the session is actually
identical (the \s-1SSL_SESSION\s0 object is identical), \fISSL_CTX_add_session()\fR
is a no\-op, and the return value is 0.
.PP
If a server \s-1SSL_CTX\s0 is configured with the \s-1SSL_SESS_CACHE_NO_INTERNAL_STORE\s0
flag then the internal cache will not be populated automatically by new
sessions negotiated by the \s-1SSL/TLS\s0 implementation, even though the internal
cache will be searched automatically for session-resume requests (the
latter can be surpressed by \s-1SSL_SESS_CACHE_NO_INTERNAL_LOOKUP\s0). So the
application can use \fISSL_CTX_add_session()\fR directly to have full control
over the sessions that can be resumed if desired.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The following values are returned by all functions:
.IP "0" 4
.Vb 3
\& The operation failed. In case of the add operation, it was tried to add
\& the same (identical) session twice. In case of the remove operation, the
\& session was not found in the cache.
.Ve
.IP "1" 4
.IX Item "1"
.Vb 1
\& The operation succeeded.
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIssl\fR\|(3),
\&\fISSL_CTX_set_session_cache_mode\fR\|(3),
\&\fISSL_SESSION_free\fR\|(3)
|
