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gnutls_init - Man Page

API function


#include <gnutls/gnutls.h>

int gnutls_init(gnutls_session_t * session, unsigned int flags);


gnutls_session_t * session

is a pointer to a gnutls_session_t type.

unsigned int flags

indicate if this session is to be used for server or client.


This function initializes the provided session. Every session must be initialized before use, and after successful initialization and use must be deinitialized by calling gnutls_deinit().

flags can be any combination of flags from gnutls_init_flags_t.

Note that since version 3.1.2 this function enables some common TLS extensions such as session tickets and OCSP certificate status request in client side by default. To prevent that use the GNUTLS_NO_DEFAULT_EXTENSIONS flag.

Note that it is never mandatory to use gnutls_deinit() after this function fails.  Since gnutls 3.8.0, it is safe to unconditionally use gnutls_deinit() even after failure regardless of whether the memory was initialized prior to gnutls_init(); however, clients wanting to be portable to older versions of the library should either skip deinitialization on failure, or pre-initialize the memory passed in to gnutls_init() to all zeroes via memset() or similar.


GNUTLS_E_SUCCESS on success, or an error code.

Reporting Bugs

Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org

See Also

The full documentation for gnutls is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit



3.8.6 gnutls