sen_dport
sunion.sin.sin_port = ipa->ipa_info.sen_dport;
sunion.sin.sin_port = ipa->ipa_mask.sen_dport;
flow->sen_dport = dst->sin.sin_port;
flowmask->sen_dport = dstmask->sin.sin_port;
sunion->sin.sin_port = encap->sen_dport;
(caddr_t) &(ddst->sen_dport));
ddst->sen_dport = 0;
ipa->ipa_info.sen_dport = ipo->ipo_addr.sen_dport;
ipa->ipa_mask.sen_dport = ipo->ipo_mask.sen_dport;