ngtcp2_crypto_verify_retry_token
================================

Synopsis
--------

*#include <ngtcp2/ngtcp2_crypto.h>*

.. function:: int ngtcp2_crypto_verify_retry_token( ngtcp2_cid *odcid, const uint8_t *token, size_t tokenlen, const uint8_t *secret, size_t secretlen, uint32_t version, const ngtcp2_sockaddr *remote_addr, ngtcp2_socklen remote_addrlen, const ngtcp2_cid *dcid, ngtcp2_duration timeout, ngtcp2_tstamp ts)

    
    `ngtcp2_crypto_verify_retry_token` verifies Retry token stored in
    the buffer pointed by *token* of length *tokenlen*.  *secret* of
    length *secretlen* is a keying material to generate keys to decrypt
    the token.  *version* is QUIC version of the Initial packet that
    contains this token.  *remote_addr* of length *remote_addrlen* is
    an address of client.  *dcid* is a Destination Connection ID in
    Initial packet sent by client.  *timeout* is the period during
    which the token is valid.  *ts* is the current timestamp.  When
    validation succeeds, the extracted Destination Connection ID (which
    is the Destination Connection ID in Initial packet sent by client
    that triggered Retry packet) is stored in the buffer pointed by
    *odcid*.
    
    This function returns 0 if it succeeds, or -1.