Represents the CoAP transmission parameters.

Note

  • mAckTimeout * ((2 ** (mMaxRetransmit + 1)) - 1) * (mAckRandomFactorNumerator / mAckRandomFactorDenominator) must not exceed what can be represented by a uint32_t (0xffffffff). This limitation allows OpenThread to avoid 64-bit arithmetic.

Public Attributes#

uint32_t

Minimum spacing before first retransmission when ACK is not received, in milliseconds (RFC7252 default value is 2000ms).

uint8_t

Numerator of ACK_RANDOM_FACTOR used to calculate maximum spacing before first retransmission when ACK is not received (RFC7252 default value of ACK_RANDOM_FACTOR is 1.5; must not be decreased below 1).

uint8_t

Denominator of ACK_RANDOM_FACTOR used to calculate maximum spacing before first retransmission when ACK is not received (RFC7252 default value of ACK_RANDOM_FACTOR is 1.5; must not be decreased below 1).

uint8_t

Maximum number of retransmissions for CoAP Confirmable messages (RFC7252 default value is 4).

Public Attribute Documentation#

mAckTimeout#

uint32_t otCoapTxParameters::mAckTimeout

Minimum spacing before first retransmission when ACK is not received, in milliseconds (RFC7252 default value is 2000ms).


Definition at line 448 of file include/openthread/coap.h

mAckRandomFactorNumerator#

uint8_t otCoapTxParameters::mAckRandomFactorNumerator

Numerator of ACK_RANDOM_FACTOR used to calculate maximum spacing before first retransmission when ACK is not received (RFC7252 default value of ACK_RANDOM_FACTOR is 1.5; must not be decreased below 1).


Definition at line 454 of file include/openthread/coap.h

mAckRandomFactorDenominator#

uint8_t otCoapTxParameters::mAckRandomFactorDenominator

Denominator of ACK_RANDOM_FACTOR used to calculate maximum spacing before first retransmission when ACK is not received (RFC7252 default value of ACK_RANDOM_FACTOR is 1.5; must not be decreased below 1).


Definition at line 460 of file include/openthread/coap.h

mMaxRetransmit#

uint8_t otCoapTxParameters::mMaxRetransmit

Maximum number of retransmissions for CoAP Confirmable messages (RFC7252 default value is 4).


Definition at line 465 of file include/openthread/coap.h