# Copyright (c) 2020 HAW Hamburg
#
# This file is subject to the terms and conditions of the GNU Lesser
# General Public License v2.1. See the file LICENSE in the top level
# directory for more details.
#

config HAS_PROTOCOL_COAP
    bool
    help
        Specifies that CoAP support is present.

menuconfig KCONFIG_COAP
    bool "Configure CoAP generic options"
    depends on HAS_PROTOCOL_COAP
    help
        Configure CoAP generic options via Kconfig.

if KCONFIG_COAP

config COAP_ACK_TIMEOUT_MS
    int "Timeout in milliseconds for a response to a confirmable request"
    default 2000
    help
        This value is for the response to the initial confirmable message. The
        timeout doubles for subsequent retries. To avoid synchronization of
        resends across hosts, the actual timeout is chosen randomly between
        @ref CONFIG_COAP_ACK_TIMEOUT_MS and
        (@ref CONFIG_COAP_ACK_TIMEOUT_MS * @ref CONFIG_COAP_RANDOM_FACTOR_1000 / 1000).
        The default of 2 seconds is taken from
        [RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).

config COAP_RANDOM_FACTOR_1000
    int "Timeout random factor (multiplied by 1000)"
    default 1500
    help
        This value is used to calculate the upper bound for the timeout. It
        represents the `ACK_RANDOM_FACTOR`
        ([RFC 7252, section 4.2](https://tools.ietf.org/html/rfc7252#section-4.2))
        multiplied by 1000, to avoid floating point arithmetic.
        The default that represents 1.5 seconds is taken from
        The default of 2 seconds is taken from
        [RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).

config COAP_MAX_RETRANSMIT
    int "Maximum number of retransmissions"
    default 4
    help
        Maximum number of retransmissions for a confirmable request. The default
        of 4 retransmissions is taken from
        [RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).

endif # KCONFIG_COAP