69 lines
2.2 KiB
Go
69 lines
2.2 KiB
Go
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// Copyright 2018 Google LLC. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package nftables
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import (
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"github.com/mdlayher/netlink"
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"golang.org/x/sys/unix"
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)
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// TableFamily specifies the address family for this table.
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type TableFamily byte
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// Possible TableFamily values.
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const (
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TableFamilyIPv4 TableFamily = unix.AF_INET
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TableFamilyIPv6 TableFamily = unix.AF_INET6
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)
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// A Table contains Chains. See also
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// https://wiki.nftables.org/wiki-nftables/index.php/Configuring_tables
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type Table struct {
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Name string
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Family TableFamily
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}
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// DelTable deletes a specific table, along with all chains/rules it contains.
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func (cc *Conn) DelTable(t *Table) {
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data := cc.marshalAttr([]netlink.Attribute{
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{Type: unix.NFTA_TABLE_NAME, Data: []byte(t.Name + "\x00")},
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{Type: unix.NFTA_TABLE_FLAGS, Data: []byte{0, 0, 0, 0}},
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})
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cc.messages = append(cc.messages, netlink.Message{
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Header: netlink.Header{
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Type: netlink.HeaderType((unix.NFNL_SUBSYS_NFTABLES << 8) | unix.NFT_MSG_DELTABLE),
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Flags: netlink.Request | netlink.Acknowledge,
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},
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Data: append(extraHeader(uint8(t.Family), 0), data...),
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})
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}
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// AddTable adds the specified Table. See also
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// https://wiki.nftables.org/wiki-nftables/index.php/Configuring_tables
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func (cc *Conn) AddTable(t *Table) *Table {
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data := cc.marshalAttr([]netlink.Attribute{
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{Type: unix.NFTA_TABLE_NAME, Data: []byte(t.Name + "\x00")},
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{Type: unix.NFTA_TABLE_FLAGS, Data: []byte{0, 0, 0, 0}},
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})
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cc.messages = append(cc.messages, netlink.Message{
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Header: netlink.Header{
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Type: netlink.HeaderType((unix.NFNL_SUBSYS_NFTABLES << 8) | unix.NFT_MSG_NEWTABLE),
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Flags: netlink.Request | netlink.Acknowledge | netlink.Create,
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},
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Data: append(extraHeader(uint8(t.Family), 0), data...),
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})
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return t
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}
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