ngtcp2_accept
=============

Synopsis
--------

*#include <ngtcp2/ngtcp2.h>*

.. function:: int ngtcp2_accept(ngtcp2_pkt_hd *dest, const uint8_t *pkt, size_t pktlen)

    
    `ngtcp2_accept` is used by server implementation, and decides
    whether packet *pkt* of length *pktlen* from client is acceptable
    for the very first packet to a connection.
    
    If *dest* is not ``NULL`` and the function returns 0, the decoded
    packet header is stored in the object pointed by *dest*.
    
    This function returns 0 if it succeeds, or one of the following
    negative error codes:
    
    :macro:`NGTCP2_ERR_INVALID_ARGUMENT`
        The packet is not acceptable for the very first packet to a new
        connection; or the function failed to parse the packet header.