TSTORM_TCP_ST_CONTEXT_SECTION_RTT_SRTT_SHIFT
ttcp_st->flags1 |= (sm_rtt << TSTORM_TCP_ST_CONTEXT_SECTION_RTT_SRTT_SHIFT); /* given in ticks, no conversion is required */
>> TSTORM_TCP_ST_CONTEXT_SECTION_RTT_SRTT_SHIFT;