ngtcp2_crypto_version_negotiation_cb
====================================

Synopsis
--------

*#include <ngtcp2/ngtcp2_crypto.h>*

.. function:: int ngtcp2_crypto_version_negotiation_cb(ngtcp2_conn *conn, uint32_t version, const ngtcp2_cid *client_dcid, void *user_data)

    
    `ngtcp2_crypto_version_negotiation_cb` installs Initial keys for
    *version* which is negotiated or being negotiated.  *client_dcid*
    is the destination connection ID in first Initial packet from
    client.
    
    This function can be directly passed to
    :member:`ngtcp2_callbacks.version_negotiation` field.