More details about session timeout settings.

doc/ssl/SSL_CTX_set_timeout.pod

@@ -37,7 +37,10 @@ L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)> is called, either
 directly by the application or automatically (see
 L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>)
 
-The default value for session timeout is 300 seconds.
+The default value for session timeout is decided on a per protocol
+basis, see L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>.
+All currently supported protocols have the same default timeout value
+of 300 seconds.
 
 =head1 RETURN VALUES
 
@@ -50,6 +53,7 @@ SSL_CTX_get_timeout() returns the currently set timeout value.
 L<ssl(3)|ssl(3)>,
 L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
 L<SSL_SESSION_get_time(3)|SSL_SESSION_get_time(3)>,
-L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>
+L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>,
+L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>
 
 =cut

doc/ssl/SSL_SESSION_get_time.pod

@@ -58,6 +58,7 @@ If any of the function is passed the NULL pointer for the session B<s>,
 =head1 SEE ALSO
 
 L<ssl(3)|ssl(3)>,
-L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>
+L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>,
+L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>
 
 =cut

doc/ssl/SSL_get_default_timeout.pod

@@ -0,0 +1,41 @@
+=pod
+
+=head1 NAME
+
+SSL_get_default_timeout - get default session timeout value
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ long SSL_get_default_timeout(SSL *ssl);
+
+=head1 DESCRIPTION
+
+SSL_get_default_timeout() returns the default timeout value assigned to
+SSL_SESSION objects negotiated for the protocol valid for B<ssl>.
+
+=head1 NOTES
+
+Whenever a new session is negotiated, it is assigned a timeout value,
+after which it will not be accepted for session reuse. If the timeout
+value was not explicitly set using
+L<SSL_CTX_set_timeout(3)|SSL_CTX_set_timeout(3)>, the hardcoded default
+timeout for the protocol will be used.
+
+SSL_get_default_timeout() return this hardcoded value, which is 300 seconds
+for all currently supported protocols (SSLv2, SSLv3, and TLSv1).
+
+=head1 RETURN VALUES
+
+See description.
+
+=head1 SEE ALSO
+
+L<ssl(3)|ssl(3)>,
+L<SSL_CTX_set_session_cache_mode(3)|SSL_CTX_set_session_cache_mode(3)>,
+L<SSL_SESSION_get_time(3)|SSL_SESSION_get_time(3)>,
+L<SSL_CTX_flush_sessions(3)|SSL_CTX_flush_sessions(3)>,
+L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>
+
+=cut

doc/ssl/ssl.pod

@@ -679,6 +679,7 @@ L<SSL_CTX_use_certificate(3)|SSL_CTX_use_certificate(3)>,
 L<SSL_get_SSL_CTX(3)|SSL_get_SSL_CTX(3)>,
 L<SSL_get_ciphers(3)|SSL_get_ciphers(3)>,
 L<SSL_get_client_CA_list(3)|SSL_get_client_CA_list(3)>,
+L<SSL_get_default_timeout(3)|SSL_get_default_timeout(3)>,
 L<SSL_get_error(3)|SSL_get_error(3)>,
 L<SSL_get_ex_data_X509_STORE_CTX_idx(3)|SSL_get_ex_data_X509_STORE_CTX_idx(3)>,
 L<SSL_get_ex_new_index(3)|SSL_get_ex_new_index(3)>,