60 	OVS_CT_NAT = 1 << 0,     /* NAT for committed connections only. */
61 	OVS_CT_SRC_NAT = 1 << 1, /* Source NAT for NEW connections. */
62 	OVS_CT_DST_NAT = 1 << 2, /* Destination NAT for NEW connections. */
71 	u8 nat : 3;                 /* enum ovs_ct_nat */  member
79 	struct nf_nat_range2 range;  /* Only present for SRC NAT and DST NAT. */
237  * 'keep_nat_flags' is true, the existing NAT flags retained, else they are
490 	 * FTP with NAT) adusting the TCP payload size when mangling IP  in ovs_ct_helper()
623 	/* Must invert the tuple if skb has been transformed by NAT. */  in ovs_ct_find_existing()
728  * range is only used for new, uninitialized NAT state.
743 		hooknum = NF_INET_LOCAL_IN; /* Source NAT */  in ovs_ct_nat_execute()
745 		hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */  in ovs_ct_nat_execute()
781 			/* Initialize according to the NAT action. */  in ovs_ct_nat_execute()
870 	/* Add NAT extension if not confirmed yet. */  in ovs_ct_nat()
872 		return NF_ACCEPT;   /* Can't NAT. */  in ovs_ct_nat()
874 	/* Determine NAT type.  in ovs_ct_nat()
875 	 * Check if the NAT type can be deduced from the tracked connection.  in ovs_ct_nat()
879 	if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW &&  in ovs_ct_nat()
882 		/* NAT an established or related connection like before. */  in ovs_ct_nat()
885 			 * for which NAT was applied in the forward  in ovs_ct_nat()
886 			 * direction.  Do the reverse NAT.  in ovs_ct_nat()
893 	} else if (info->nat & OVS_CT_SRC_NAT) {  in ovs_ct_nat()
895 	} else if (info->nat & OVS_CT_DST_NAT) {  in ovs_ct_nat()
917 	/* Mark NAT done if successful and update the flow key. */  in ovs_ct_nat()
969 		/* Clear CT state NAT flags to mark that we have not yet done  in __ovs_ct_lookup()
970 		 * NAT after the nf_conntrack_in() call.  We can actually clear  in __ovs_ct_lookup()
975 		/* Update the key, but keep the NAT flags. */  in __ovs_ct_lookup()
982 		 * helper, so that the helper knows about the NAT.  We enforce  in __ovs_ct_lookup()
983 		 * this by delaying both NAT and helper calls for unconfirmed  in __ovs_ct_lookup()
985 		 * packets NAT and Helper may be called in either order.  in __ovs_ct_lookup()
987 		 * NAT will be done only if the CT action has NAT, and only  in __ovs_ct_lookup()
988 		 * once per packet (per zone), as guarded by the NAT bits in  in __ovs_ct_lookup()
991 		if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) &&  in __ovs_ct_lookup()
1043 		 * committed, so we are not calling into NAT here.  in ovs_ct_lookup()
1334 	if (info->nat)  in ovs_ct_add_helper()
1367 			OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)",  in parse_nat()
1373 			OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)",  in parse_nat()
1382 			if (info->nat) {  in parse_nat()
1383 				OVS_NLERR(log, "Only one type of NAT may be specified");  in parse_nat()
1386 			info->nat |= OVS_CT_NAT;  in parse_nat()
1387 			info->nat |= ((type == OVS_NAT_ATTR_SRC)  in parse_nat()
1428 			OVS_NLERR(log, "Unknown nat attribute (%d)", type);  in parse_nat()
1434 		OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem);  in parse_nat()
1437 	if (!info->nat) {  in parse_nat()
1441 				  "NAT flags may be given only when NAT range (SRC or DST) is also specified."  in parse_nat()
1445 		info->nat = OVS_CT_NAT;   /* NAT existing connections. */  in parse_nat()
1448 			  "NAT attributes may be specified only when CT COMMIT flag is also specified."  in parse_nat()
1478 	/* NAT length is checked when parsing the nested attributes. */
1678 	if (info->nat & OVS_CT_SRC_NAT) {  in ovs_ct_nat_to_attr()
1681 	} else if (info->nat & OVS_CT_DST_NAT) {  in ovs_ct_nat_to_attr()
1771 	if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb))  in ovs_ct_action_to_attr()