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[dragonfly.git] / secure / lib / libssl / man / SSL_get_session.3
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80.\" If the F register is turned on, we'll generate
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96.TH SSL_get_session 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
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188.\}
189.rm #[ #] #H #V #F C
984263bc 190.SH "NAME"
a7d27d5a 191SSL_get_session \- retrieve TLS/SSL session data
984263bc 192.SH "SYNOPSIS"
a7d27d5a 193.PP
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194.Vb 1
195\& #include <openssl/ssl.h>
196.Ve
197.Vb 3
198\& SSL_SESSION *SSL_get_session(SSL *ssl);
199\& SSL_SESSION *SSL_get0_session(SSL *ssl);
200\& SSL_SESSION *SSL_get1_session(SSL *ssl);
201.Ve
202.SH "DESCRIPTION"
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203\fISSL_get_session()\fR returns a pointer to the \fBSSL_SESSION\fR actually used in
204\fBssl\fR. The reference count of the \fBSSL_SESSION\fR is not incremented, so
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205that the pointer can become invalid by other operations.
206.PP
a7d27d5a 207\fISSL_get0_session()\fR is the same as \fISSL_get_session()\fR.
984263bc 208.PP
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209\fISSL_get1_session()\fR is the same as \fISSL_get_session()\fR, but the reference
210count of the \fBSSL_SESSION\fR is incremented by one.
984263bc 211.SH "NOTES"
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212The ssl session contains all information required to re-establish the
213connection without a new handshake.
214.PP
a7d27d5a 215\fISSL_get0_session()\fR returns a pointer to the actual session. As the
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216reference counter is not incremented, the pointer is only valid while
217the connection is in use. If SSL_clear(3) or
218SSL_free(3) is called, the session may be removed completely
219(if considered bad), and the pointer obtained will become invalid. Even
220if the session is valid, it can be removed at any time due to timeout
221during SSL_CTX_flush_sessions(3).
222.PP
223If the data is to be kept, \fISSL_get1_session()\fR will increment the reference
224count, so that the session will not be implicitly removed by other operations
225but stays in memory. In order to remove the session
226SSL_SESSION_free(3) must be explicitly called once
227to decrement the reference count again.
228.PP
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229SSL_SESSION objects keep internal link information about the session cache
230list, when being inserted into one SSL_CTX object's session cache.
231One SSL_SESSION object, regardless of its reference count, must therefore
232only be used with one SSL_CTX object (and the SSL objects created
233from this SSL_CTX object).
984263bc 234.SH "RETURN VALUES"
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235The following return values can occur:
236.Ip "\s-1NULL\s0" 4
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237There is no session available in \fBssl\fR.
238.Ip "Pointer to an \s-1SSL\s0" 4
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239The return value points to the data of an \s-1SSL\s0 session.
240.SH "SEE ALSO"
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241ssl(3), SSL_free(3),
242SSL_clear(3),
243SSL_SESSION_free(3)
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244
245.rn }` ''
246.IX Title "SSL_get_session 3"
247.IX Name "SSL_get_session - retrieve TLS/SSL session data"
248
249.IX Header "NAME"
250
251.IX Header "SYNOPSIS"
252
253.IX Header "DESCRIPTION"
254
255.IX Header "NOTES"
256
257.IX Header "RETURN VALUES"
258
259.IX Item "\s-1NULL\s0"
260
261.IX Item "Pointer to an \s-1SSL\s0"
262
263.IX Header "SEE ALSO"
264