Moves to official vendoring solution

vendor/github.com/vishvananda/netlink/xfrm_state.go

@@ -0,0 +1,53 @@
+package netlink
+
+import (
+	"net"
+)
+
+// XfrmStateAlgo represents the algorithm to use for the ipsec encryption.
+type XfrmStateAlgo struct {
+	Name        string
+	Key         []byte
+	TruncateLen int // Auth only
+}
+
+// EncapType is an enum representing an ipsec template direction.
+type EncapType uint8
+
+const (
+	XFRM_ENCAP_ESPINUDP_NONIKE EncapType = iota + 1
+	XFRM_ENCAP_ESPINUDP
+)
+
+func (e EncapType) String() string {
+	switch e {
+	case XFRM_ENCAP_ESPINUDP_NONIKE:
+		return "espinudp-nonike"
+	case XFRM_ENCAP_ESPINUDP:
+		return "espinudp"
+	}
+	return "unknown"
+}
+
+// XfrmEncap represents the encapsulation to use for the ipsec encryption.
+type XfrmStateEncap struct {
+	Type            EncapType
+	SrcPort         int
+	DstPort         int
+	OriginalAddress net.IP
+}
+
+// XfrmState represents the state of an ipsec policy. It optionally
+// contains an XfrmStateAlgo for encryption and one for authentication.
+type XfrmState struct {
+	Dst          net.IP
+	Src          net.IP
+	Proto        Proto
+	Mode         Mode
+	Spi          int
+	Reqid        int
+	ReplayWindow int
+	Auth         *XfrmStateAlgo
+	Crypt        *XfrmStateAlgo
+	Encap        *XfrmStateEncap
+}