Add initial nftables client implementation

family_type.go

@@ -0,0 +1,30 @@
+package nft
+
+import "fmt"
+
+type FamilyType int8
+
+const (
+	IP FamilyType = iota + 1
+	IP6
+	INET
+	ARP
+	BRIDGE
+)
+
+func (f FamilyType) String() string {
+	switch f {
+	case IP:
+		return "ip"
+	case IP6:
+		return "ip6"
+	case INET:
+		return "inet"
+	case ARP:
+		return "arp"
+	case BRIDGE:
+		return "bridge"
+	default:
+		return fmt.Sprintf("Encoding(%d)", f)
+	}
+}