Function libcoap_sys::coap_calc_timeout

pub unsafe extern "C" fn coap_calc_timeout(
    session: *mut coap_session_t, 
    r: c_uchar
) -> c_uint

Calculates the initial timeout based on the session CoAP transmission parameters 'ack_timeout', 'ack_random_factor', and COAP_TICKS_PER_SECOND. The calculation requires 'ack_timeout' and 'ack_random_factor' to be in Qx.FRAC_BITS fixed point notation, whereas the passed parameter @p r is interpreted as the fractional part of a Q0.MAX_BITS random value.

@param session session timeout is associated with @param r random value as fractional part of a Q0.MAX_BITS fixed point value @return COAP_TICKS_PER_SECOND * 'ack_timeout' * (1 + ('ack_random_factor' - 1) * r)