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081ed44a1d
The new macspoofchk field is added to the bridge plugin to support anti-mac-spoofing. When the parameter is enabled, traffic is limited to the mac addresses of the container interface (the veth peer that is placed in the container ns). Any traffic that exits the pod is checked against the source mac address that is expected. If the mac address is different, the frames are dropped. The implementation is using nftables and should only be used on nodes that support it. Signed-off-by: Edward Haas <edwardh@redhat.com>
64 lines
2.2 KiB
Go
64 lines
2.2 KiB
Go
/*
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* This file is part of the go-nft project
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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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*
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* Copyright 2021 Red Hat, Inc.
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*
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*/
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package config
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import (
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"github.com/networkplumbing/go-nft/nft/schema"
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)
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// AddTable appends the given table to the nftable config.
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// The table is added without an explicit action (`add`).
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// Adding multiple times the same table has no effect when the config is applied.
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func (c *Config) AddTable(table *schema.Table) {
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nftable := schema.Nftable{Table: table}
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c.Nftables = append(c.Nftables, nftable)
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}
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// DeleteTable appends a given table to the nftable config
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// with the `delete` action.
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// Attempting to delete a non-existing table, results with a failure when the config is applied.
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// All chains and rules under the table are removed as well (when applied).
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func (c *Config) DeleteTable(table *schema.Table) {
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nftable := schema.Nftable{Delete: &schema.Objects{Table: table}}
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c.Nftables = append(c.Nftables, nftable)
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}
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// FlushTable appends a given table to the nftable config
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// with the `flush` action.
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// All chains and rules under the table are removed (when applied).
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// Attempting to flush a non-existing table, results with a failure when the config is applied.
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func (c *Config) FlushTable(table *schema.Table) {
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nftable := schema.Nftable{Flush: &schema.Objects{Table: table}}
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c.Nftables = append(c.Nftables, nftable)
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}
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// LookupTable searches the configuration for a matching table and returns it.
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// Mutating the returned table will result in mutating the configuration.
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func (c *Config) LookupTable(toFind *schema.Table) *schema.Table {
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for _, nftable := range c.Nftables {
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if t := nftable.Table; t != nil {
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if t.Name == toFind.Name && t.Family == toFind.Family {
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return t
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}
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}
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}
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return nil
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}
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