Configurable transport parameters. - integer parameters can be configured using the following directives: quic_max_idle_timeout quic_max_ack_delay quic_max_packet_size quic_initial_max_data quic_initial_max_stream_data_bidi_local quic_initial_max_stream_data_bidi_remote quic_initial_max_stream_data_uni quic_initial_max_streams_bidi quic_initial_max_streams_uni quic_ack_delay_exponent quic_active_migration quic_active_connection_id_limit - only following parameters are actually sent: active_connection_id_limit initial_max_streams_uni initial_max_streams_bidi initial_max_stream_data_bidi_local initial_max_stream_data_bidi_remote initial_max_stream_data_uni (other parameters are to be added into ngx_quic_create_transport_params() function as needed, should be easy now) - draft 24 and draft 27 are now supported (at compile-time using quic_version macro)

/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_CRC_H_INCLUDED_
#define _NGX_CRC_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


/* 32-bit crc16 */

static ngx_inline uint32_t
ngx_crc(u_char *data, size_t len)
{
    uint32_t  sum;

    for (sum = 0; len; len--) {

        /*
         * gcc 2.95.2 x86 and icc 7.1.006 compile
         * that operator into the single "rol" opcode,
         * msvc 6.0sp2 compiles it into four opcodes.
         */
        sum = sum >> 1 | sum << 31;

        sum += *data++;
    }

    return sum;
}


#endif /* _NGX_CRC_H_INCLUDED_ */