Macros
======
.. macro:: NGTCP2_CRYPTO_TOKEN_RAND_DATALEN

    
    :macro:`NGTCP2_CRYPTO_TOKEN_RAND_DATALEN` is the length of random
    data added to a token generated by
    `ngtcp2_crypto_generate_retry_token` or
    `ngtcp2_crypto_generate_regular_token`.
.. macro:: NGTCP2_CRYPTO_TOKEN_MAGIC_RETRY

    
    :macro:`NGTCP2_CRYPTO_TOKEN_MAGIC_RETRY` is the magic byte for
    Retry token generated by `ngtcp2_crypto_generate_retry_token`.
.. macro:: NGTCP2_CRYPTO_TOKEN_MAGIC_REGULAR

    
    :macro:`NGTCP2_CRYPTO_TOKEN_MAGIC_REGULAR` is the magic byte for a
    token generated by `ngtcp2_crypto_generate_regular_token`.
.. macro:: NGTCP2_CRYPTO_MAX_RETRY_TOKENLEN

    
    :macro:`NGTCP2_CRYPTO_MAX_RETRY_TOKENLEN` is the maximum length of
    a token generated by `ngtcp2_crypto_generate_retry_token`.
.. macro:: NGTCP2_CRYPTO_MAX_REGULAR_TOKENLEN

    
    :macro:`NGTCP2_CRYPTO_MAX_REGULAR_TOKENLEN` is the maximum length
     of a token generated by `ngtcp2_crypto_generate_regular_token`.

quictls specific error codes
----------------------------

.. macro:: NGTCP2_CRYPTO_QUICTLS_ERR_TLS_WANT_X509_LOOKUP

    
    :macro:`NGTCP2_CRYPTO_QUICTLS_ERR_TLS_WANT_X509_LOOKUP` is the
    error code which indicates that TLS handshake routine is
    interrupted by X509 certificate lookup.  See
    :macro:`SSL_ERROR_WANT_X509_LOOKUP` error description from
    `SSL_do_handshake`.
.. macro:: NGTCP2_CRYPTO_QUICTLS_ERR_TLS_WANT_CLIENT_HELLO_CB

    
    :macro:`NGTCP2_CRYPTO_QUICTLS_ERR_TLS_WANT_CLIENT_HELLO_CB` is the
    error code which indicates that TLS handshake routine is
    interrupted by client hello callback.  See
    :macro:`SSL_ERROR_WANT_CLIENT_HELLO_CB` error description from
    `SSL_do_handshake`.