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54 lines
1.9 KiB
Plaintext
54 lines
1.9 KiB
Plaintext
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# Copyright (c) 2020 HAW Hamburg
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#
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# This file is subject to the terms and conditions of the GNU Lesser
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# General Public License v2.1. See the file LICENSE in the top level
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# directory for more details.
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#
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config HAS_PROTOCOL_COAP
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bool
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help
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Specifies that CoAP support is present.
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menuconfig KCONFIG_COAP
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bool "Configure CoAP generic options"
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depends on HAS_PROTOCOL_COAP
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help
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Configure CoAP generic options via Kconfig.
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if KCONFIG_COAP
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config COAP_ACK_TIMEOUT
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int "Timeout in seconds for a response to a confirmable request"
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default 2
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help
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This value is for the response to the initial confirmable message. The
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timeout doubles for subsequent retries. To avoid synchronization of
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resends across hosts, the actual timeout is chosen randomly between
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@ref CONFIG_COAP_ACK_TIMEOUT and
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(@ref CONFIG_COAP_ACK_TIMEOUT * @ref CONFIG_COAP_RANDOM_FACTOR_1000 / 1000).
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The default of 2 seconds is taken from
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[RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).
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config COAP_RANDOM_FACTOR_1000
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int "Timeout random factor (multiplied by 1000)"
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default 1500
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help
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This value is used to calculate the upper bound for the timeout. It
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represents the `ACK_RANDOM_FACTOR`
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([RFC 7252, section 4.2](https://tools.ietf.org/html/rfc7252#section-4.2))
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multiplied by 1000, to avoid floating point arithmetic.
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The default that represents 1.5 seconds is taken from
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The default of 2 seconds is taken from
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[RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).
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config COAP_MAX_RETRANSMIT
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int "Maximum number of retransmissions"
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default 4
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help
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Maximum number of retransmissions for a confirmable request. The default
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of 4 retransmissions is taken from
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[RFC 7252, section 4.8](https://tools.ietf.org/html/rfc7252#section-4.8).
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endif # KCONFIG_COAP
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