GNU/Linux man pages
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GNU/Linux |
CentOS 2.1AS(Slurm) |
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SSL_get_session(3ssl) |
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SSL_get_session − retrieve TLS/SSL session data
#include <openssl/ssl.h> SSL_SESSION *SSL_get_session(SSL *ssl); SSL_SESSION *SSL_get0_session(SSL *ssl); SSL_SESSION *SSL_get1_session(SSL *ssl);
SSL_get_session() returns a pointer to the SSL_SESSION actually used in ssl. The reference count of the SSL_SESSION is not incremented, so that the pointer can become invalid by other operations.
SSL_get0_session() is the same as SSL_get_session().
SSL_get1_session() is the same as SSL_get_session(), but the reference count of the SSL_SESSION is incremented by one.
The ssl session contains all information required to re-establish the connection without a new handshake.
SSL_get0_session() returns a pointer to the actual session. As the reference counter is not incremented, the pointer is only valid while the connection is in use. If SSL_clear(3) or SSL_free(3) is called, the session may be removed completely (if considered bad), and the pointer obtained will become invalid. Even if the session is valid, it can be removed at any time due to timeout during SSL_CTX_flush_sessions(3).
If the data is to be kept, SSL_get1_session() will increment the reference count and the session will stay in memory until explicitly freed with SSL_SESSION_free(3), regardless of its state.
The following
return values can occur:
NULL
There is no session available in ssl.
Pointer to an SSL
The return value points to the data of an SSL session.
ssl(3), SSL_free(3), SSL_clear(3), SSL_SESSION_free(3)
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SSL_get_session(3ssl) | |