sen_sport
sunion.sin.sin_port = ipa->ipa_info.sen_sport;
sunion.sin.sin_port = ipa->ipa_mask.sen_sport;
flow->sen_sport = src->sin.sin_port;
flowmask->sen_sport = srcmask->sin.sin_port;
sunion->sin.sin_port = encap->sen_sport;
(caddr_t) &(ddst->sen_sport));
ddst->sen_sport = 0;
ipa->ipa_info.sen_sport = ipo->ipo_addr.sen_sport;
ipa->ipa_mask.sen_sport = ipo->ipo_mask.sen_sport;