SSL_get_session(3)

     SSL_get_session(3)     0.9.6h (2001-11-19)     SSL_get_session(3)

     NAME
          SSL_get_session - retrieve TLS/SSL session data

     SYNOPSIS
           #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);

     DESCRIPTION
          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.

     NOTES
          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, so that the session will not be
          implicitly removed by other operations but stays in memory.
          In order to remove the session SSL_SESSION_free(3) must be
          explicitly called once to decrement the reference count
          again.

          SSL_SESSION objects keep internal link information about the
          session cache list, when being inserted into one SSL_CTX
          object's session cache.  One SSL_SESSION object, regardless
          of its reference count, must therefore only be used with one
          SSL_CTX object (and the SSL objects created from this
          SSL_CTX object).

     RETURN VALUES
          The following return values can occur:

          NULL

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     SSL_get_session(3)     0.9.6h (2001-11-19)     SSL_get_session(3)

              There is no session available in ssl.

          Pointer to an SSL
              The return value points to the data of an SSL session.

     SEE ALSO
          ssl(3), SSL_free(3), SSL_clear(3), SSL_SESSION_free(3)

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