51 	OVS_CT_NAT = 1 << 0,     /* NAT for committed connections only. */
52 	OVS_CT_SRC_NAT = 1 << 1, /* Source NAT for NEW connections. */
53 	OVS_CT_DST_NAT = 1 << 2, /* Destination NAT for NEW connections. */
62 	u8 nat : 3;                 /* enum ovs_ct_nat */  member
72 	struct nf_nat_range2 range;  /* Only present for SRC NAT and DST NAT. */
230  * 'keep_nat_flags' is true, the existing NAT flags retained, else they are
483 	 * FTP with NAT) adusting the TCP payload size when mangling IP  in ovs_ct_helper()
621 	/* Must invert the tuple if skb has been transformed by NAT. */  in ovs_ct_find_existing()
734  * range is only used for new, uninitialized NAT state.
749 		hooknum = NF_INET_LOCAL_IN; /* Source NAT */  in ovs_ct_nat_execute()
751 		hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */  in ovs_ct_nat_execute()
787 			/* Initialize according to the NAT action. */  in ovs_ct_nat_execute()
876 	/* Add NAT extension if not confirmed yet. */  in ovs_ct_nat()
878 		return NF_ACCEPT;   /* Can't NAT. */  in ovs_ct_nat()
880 	/* Determine NAT type.  in ovs_ct_nat()
881 	 * Check if the NAT type can be deduced from the tracked connection.  in ovs_ct_nat()
885 	if (info->nat & OVS_CT_NAT && ctinfo != IP_CT_NEW &&  in ovs_ct_nat()
888 		/* NAT an established or related connection like before. */  in ovs_ct_nat()
891 			 * for which NAT was applied in the forward  in ovs_ct_nat()
892 			 * direction.  Do the reverse NAT.  in ovs_ct_nat()
899 	} else if (info->nat & OVS_CT_SRC_NAT) {  in ovs_ct_nat()
901 	} else if (info->nat & OVS_CT_DST_NAT) {  in ovs_ct_nat()
923 	/* Mark NAT done if successful and update the flow key. */  in ovs_ct_nat()
979 		/* Clear CT state NAT flags to mark that we have not yet done  in __ovs_ct_lookup()
980 		 * NAT after the nf_conntrack_in() call.  We can actually clear  in __ovs_ct_lookup()
985 		/* Update the key, but keep the NAT flags. */  in __ovs_ct_lookup()
994 		 * helper, so that the helper knows about the NAT.  We enforce  in __ovs_ct_lookup()
995 		 * this by delaying both NAT and helper calls for unconfirmed  in __ovs_ct_lookup()
997 		 * packets NAT and Helper may be called in either order.  in __ovs_ct_lookup()
999 		 * NAT will be done only if the CT action has NAT, and only  in __ovs_ct_lookup()
1000 		 * once per packet (per zone), as guarded by the NAT bits in  in __ovs_ct_lookup()
1003 		if (info->nat && !(key->ct_state & OVS_CS_F_NAT_MASK) &&  in __ovs_ct_lookup()
1022 			/* helper installed, add seqadj if NAT is required */  in __ovs_ct_lookup()
1023 			if (info->nat && !nfct_seqadj(ct)) {  in __ovs_ct_lookup()
1064 		 * committed, so we are not calling into NAT here.  in ovs_ct_lookup()
1354 	if (info->nat) {  in ovs_ct_add_helper()
1359 			OVS_NLERR(log, "Failed to load \"%s\" NAT helper, error: %d",  in ovs_ct_add_helper()
1397 			OVS_NLERR(log, "Unknown NAT attribute (type=%d, max=%d)",  in parse_nat()
1403 			OVS_NLERR(log, "NAT attribute type %d has unexpected length (%d != %d)",  in parse_nat()
1412 			if (info->nat) {  in parse_nat()
1413 				OVS_NLERR(log, "Only one type of NAT may be specified");  in parse_nat()
1416 			info->nat |= OVS_CT_NAT;  in parse_nat()
1417 			info->nat |= ((type == OVS_NAT_ATTR_SRC)  in parse_nat()
1458 			OVS_NLERR(log, "Unknown nat attribute (%d)", type);  in parse_nat()
1464 		OVS_NLERR(log, "NAT attribute has %d unknown bytes", rem);  in parse_nat()
1467 	if (!info->nat) {  in parse_nat()
1471 				  "NAT flags may be given only when NAT range (SRC or DST) is also specified."  in parse_nat()
1475 		info->nat = OVS_CT_NAT;   /* NAT existing connections. */  in parse_nat()
1478 			  "NAT attributes may be specified only when CT COMMIT flag is also specified."  in parse_nat()
1508 	/* NAT length is checked when parsing the nested attributes. */
1731 	if (info->nat & OVS_CT_SRC_NAT) {  in ovs_ct_nat_to_attr()
1734 	} else if (info->nat & OVS_CT_DST_NAT) {  in ovs_ct_nat_to_attr()
1828 	if (ct_info->nat && !ovs_ct_nat_to_attr(ct_info, skb))  in ovs_ct_action_to_attr()
1847 		if (ct_info->nat)  in __ovs_ct_free_action()