Function s2n_tls_sys::s2n_psk_set_application_protocol

pub unsafe extern "C" fn s2n_psk_set_application_protocol(
    psk: *mut s2n_psk, 
    application_protocol: *const u8, 
    size: u8
) -> c_int

Sets the optional application_protocol associated with the given pre-shared key.

In order to use early data, the application_protocol set on the pre-shared key must match the application_protocol ultimately negotiated by the TLS handshake.

@param psk A pointer to the pre-shared key, created with s2n_external_psk_new. @param application_protocol A pointer to the associated application protocol data. This data will be copied. @param size The size of the data to read from the application_protocol pointer. @return A POSIX error signal. If successful, the application protocol was set.