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*/		*/
tcp_dooptions(&to, (u_char *)(th + 1),		tcp_dooptions(&to, (u_char *)(th + 1),
(th->th_off << 2) - sizeof(struct tcphdr),		(th->th_off << 2) - sizeof(struct tcphdr),
(thflags & TH_SYN) ? TO_SYN : 0);		(thflags & TH_SYN) ? TO_SYN : 0);

/*		/*
* If timestamps were negotiated during SYN/ACK and a		* If timestamps were negotiated during SYN/ACK and a
* segment without a timestamp is received, silently drop		* segment without a timestamp is received, silently drop
* the segment.		* the segment, unless the missing timestamps are tolerated.
* See section 3.2 of RFC 7323.		* See section 3.2 of RFC 7323.
*/		*/
if ((tp->t_flags & TF_RCVD_TSTMP) && !(to.to_flags & TOF_TS)) {		if ((tp->t_flags & TF_RCVD_TSTMP) && !(to.to_flags & TOF_TS) &&
		(!V_tcp_tolerate_missing_ts)) {
way_out = 5;		way_out = 5;
retval = 0;		retval = 0;
goto done_with_input;		goto done_with_input;
}		}

/*		/*
* Segment received on connection. Reset idle time and keep-alive		* Segment received on connection. Reset idle time and keep-alive
* timer. XXX: This should be done after segment validation to		* timer. XXX: This should be done after segment validation to
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