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1.\" $OpenBSD: SSL_CTX_sess_number.3,v 1.9 2019/06/12 09:36:30 schwarze Exp $
2.\" OpenSSL SSL_CTX_sess_number.pod 7bd27895 Mar 29 11:45:29 2017 +1000
3.\"
4.\" This file was written by Lutz Jaenicke <jaenicke@openssl.org>.
5.\" Copyright (c) 2001 The OpenSSL Project. All rights reserved.
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51.Dd $Mdocdate: June 12 2019 $
52.Dt SSL_CTX_SESS_NUMBER 3
53.Os
54.Sh NAME
55.Nm SSL_CTX_sess_number ,
56.Nm SSL_CTX_sess_connect ,
57.Nm SSL_CTX_sess_connect_good ,
58.Nm SSL_CTX_sess_connect_renegotiate ,
59.Nm SSL_CTX_sess_accept ,
60.Nm SSL_CTX_sess_accept_good ,
61.Nm SSL_CTX_sess_accept_renegotiate ,
62.Nm SSL_CTX_sess_hits ,
63.Nm SSL_CTX_sess_cb_hits ,
64.Nm SSL_CTX_sess_misses ,
65.Nm SSL_CTX_sess_timeouts ,
66.Nm SSL_CTX_sess_cache_full
67.Nd obtain session cache statistics
68.Sh SYNOPSIS
69.In openssl/ssl.h
70.Ft long
71.Fn SSL_CTX_sess_number "SSL_CTX *ctx"
72.Ft long
73.Fn SSL_CTX_sess_connect "SSL_CTX *ctx"
74.Ft long
75.Fn SSL_CTX_sess_connect_good "SSL_CTX *ctx"
76.Ft long
77.Fn SSL_CTX_sess_connect_renegotiate "SSL_CTX *ctx"
78.Ft long
79.Fn SSL_CTX_sess_accept "SSL_CTX *ctx"
80.Ft long
81.Fn SSL_CTX_sess_accept_good "SSL_CTX *ctx"
82.Ft long
83.Fn SSL_CTX_sess_accept_renegotiate "SSL_CTX *ctx"
84.Ft long
85.Fn SSL_CTX_sess_hits "SSL_CTX *ctx"
86.Ft long
87.Fn SSL_CTX_sess_cb_hits "SSL_CTX *ctx"
88.Ft long
89.Fn SSL_CTX_sess_misses "SSL_CTX *ctx"
90.Ft long
91.Fn SSL_CTX_sess_timeouts "SSL_CTX *ctx"
92.Ft long
93.Fn SSL_CTX_sess_cache_full "SSL_CTX *ctx"
94.Sh DESCRIPTION
95.Fn SSL_CTX_sess_number
96returns the current number of sessions in the internal session cache.
97.Pp
98.Fn SSL_CTX_sess_connect
99returns the number of started SSL/TLS handshakes in client mode.
100.Pp
101.Fn SSL_CTX_sess_connect_good
102returns the number of successfully established SSL/TLS sessions in client mode.
103.Pp
104.Fn SSL_CTX_sess_connect_renegotiate
105returns the number of started renegotiations in client mode.
106.Pp
107.Fn SSL_CTX_sess_accept
108returns the number of started SSL/TLS handshakes in server mode.
109.Pp
110.Fn SSL_CTX_sess_accept_good
111returns the number of successfully established SSL/TLS sessions in server mode.
112.Pp
113.Fn SSL_CTX_sess_accept_renegotiate
114returns the number of started renegotiations in server mode.
115.Pp
116.Fn SSL_CTX_sess_hits
117returns the number of successfully reused sessions.
118In client mode a session set with
119.Xr SSL_set_session 3
120successfully reused is counted as a hit.
121In server mode a session successfully retrieved from internal or external cache
122is counted as a hit.
123.Pp
124.Fn SSL_CTX_sess_cb_hits
125returns the number of successfully retrieved sessions from the external session
126cache in server mode.
127.Pp
128.Fn SSL_CTX_sess_misses
129returns the number of sessions proposed by clients that were not found in the
130internal session cache in server mode.
131.Pp
132.Fn SSL_CTX_sess_timeouts
133returns the number of sessions proposed by clients and either found in the
134internal or external session cache in server mode,
135but that were invalid due to timeout.
136These sessions are not included in the
137.Fn SSL_CTX_sess_hits
138count.
139.Pp
140.Fn SSL_CTX_sess_cache_full
141returns the number of sessions that were removed because the maximum session
142cache size was exceeded.
143.Sh SEE ALSO
144.Xr ssl 3 ,
145.Xr SSL_CTX_ctrl 3 ,
146.Xr SSL_CTX_sess_set_cache_size 3 ,
147.Xr SSL_CTX_set_session_cache_mode 3 ,
148.Xr SSL_set_session 3
149.Sh HISTORY
150.Fn SSL_CTX_sess_number ,
151.Fn SSL_CTX_sess_connect ,
152.Fn SSL_CTX_sess_connect_good ,
153.Fn SSL_CTX_sess_accept ,
154.Fn SSL_CTX_sess_accept_good ,
155.Fn SSL_CTX_sess_hits ,
156.Fn SSL_CTX_sess_misses ,
157and
158.Fn SSL_CTX_sess_timeouts
159first appeared in SSLeay 0.5.2.
160.Fn SSL_CTX_sess_cb_hits
161first appeared in SSLeay 0.6.0.
162.Fn SSL_CTX_sess_connect_renegotiate ,
163.Fn SSL_CTX_sess_accept_renegotiate ,
164and
165.Fn SSL_CTX_sess_cache_full
166first appeared in SSLeay 0.9.0.
167All these functions have been available since
168.Ox 2.4 .
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