Update dependencies

vendor/github.com/google/nftables/expr/tproxy.go

@@ -0,0 +1,82 @@
+// Copyright 2018 Google LLC. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package expr
+
+import (
+	"encoding/binary"
+
+	"github.com/google/nftables/binaryutil"
+	"github.com/mdlayher/netlink"
+	"golang.org/x/sys/unix"
+)
+
+const (
+	// NFTA_TPROXY_FAMILY defines attribute for a table family
+	NFTA_TPROXY_FAMILY = 0x01
+	// NFTA_TPROXY_REG_ADDR defines attribute for a register carrying redirection address value
+	NFTA_TPROXY_REG_ADDR = 0x02
+	// NFTA_TPROXY_REG_PORT defines attribute for a register carrying redirection port value
+	NFTA_TPROXY_REG_PORT = 0x03
+)
+
+// TProxy defines struct with parameters for the transparent proxy
+type TProxy struct {
+	Family      byte
+	TableFamily byte
+	RegAddr     uint32
+	RegPort     uint32
+}
+
+func (e *TProxy) marshal(fam byte) ([]byte, error) {
+	attrs := []netlink.Attribute{
+		{Type: NFTA_TPROXY_FAMILY, Data: binaryutil.BigEndian.PutUint32(uint32(e.Family))},
+		{Type: NFTA_TPROXY_REG_PORT, Data: binaryutil.BigEndian.PutUint32(e.RegPort)},
+	}
+
+	if e.RegAddr != 0 {
+		attrs = append(attrs, netlink.Attribute{
+			Type: NFTA_TPROXY_REG_ADDR,
+			Data: binaryutil.BigEndian.PutUint32(e.RegAddr),
+		})
+	}
+
+	data, err := netlink.MarshalAttributes(attrs)
+	if err != nil {
+		return nil, err
+	}
+	return netlink.MarshalAttributes([]netlink.Attribute{
+		{Type: unix.NFTA_EXPR_NAME, Data: []byte("tproxy\x00")},
+		{Type: unix.NLA_F_NESTED | unix.NFTA_EXPR_DATA, Data: data},
+	})
+}
+
+func (e *TProxy) unmarshal(fam byte, data []byte) error {
+	ad, err := netlink.NewAttributeDecoder(data)
+	if err != nil {
+		return err
+	}
+	ad.ByteOrder = binary.BigEndian
+	for ad.Next() {
+		switch ad.Type() {
+		case NFTA_TPROXY_FAMILY:
+			e.Family = ad.Uint8()
+		case NFTA_TPROXY_REG_PORT:
+			e.RegPort = ad.Uint32()
+		case NFTA_TPROXY_REG_ADDR:
+			e.RegAddr = ad.Uint32()
+		}
+	}
+	return ad.Err()
+}