Provided by: gnutls-doc_3.6.9-5ubuntu1_all
gnutls_alpn_get_selected_protocol - API function
#include <gnutls/gnutls.h> int gnutls_alpn_get_selected_protocol(gnutls_session_t session, gnutls_datum_t * protocol);
gnutls_session_t session is a gnutls_session_t type. gnutls_datum_t * protocol will hold the protocol name
This function allows you to get the negotiated protocol name. The returned protocol should be treated as opaque, constant value and only valid during the session life. The selected protocol is the first supported by the list sent by the client.
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error code is returned. Since 3.2.0
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