gnutls_handshake_set_post_client_hello_function - API function
- gnutls_session_t session
- is a gnutls_session_t type.
- gnutls_handshake_simple_hook_func func
- is the function to be called
This function will set a callback to be called after the client hello has been
received (callback valid in server side only). This allows the server to
adjust settings based on received extensions.
Those settings could be ciphersuites, requesting certificate, or anything else
except for version negotiation (this is done before the hello message is
This callback must return 0 on success or a gnutls error code to terminate the
Since GnuTLS 3.3.5 the callback is allowed to return GNUTLS_E_AGAIN
to put the handshake on hold. In that case
will return GNUTLS_E_INTERRUPTED
and can be
resumed when needed.
You should not use this function to terminate the handshake based on client
input unless you know what you are doing. Before the handshake is finished
there is no way to know if there is a man-in-the-middle attack being
Report bugs to <firstname.lastname@example.org>.
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