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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>
60 lines
1.7 KiB
Go
60 lines
1.7 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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"encoding/json"
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"github.com/networkplumbing/go-nft/nft/schema"
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)
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type Config struct {
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schema.Root
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}
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// New returns a new nftables config structure.
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func New() *Config {
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c := &Config{}
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c.Nftables = []schema.Nftable{}
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return c
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}
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// ToJSON returns the JSON encoding of the nftables config.
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func (c *Config) ToJSON() ([]byte, error) {
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return json.Marshal(*c)
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}
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// FromJSON decodes the provided JSON-encoded data and populates the nftables config.
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func (c *Config) FromJSON(data []byte) error {
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if err := json.Unmarshal(data, c); err != nil {
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return err
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}
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return nil
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}
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// FlushRuleset adds a command to the nftables config that erases all the configuration when applied.
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// It is commonly used as the first config instruction, followed by a declarative configuration.
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// When used, any previous configuration is flushed away before adding the new one.
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// Calling FlushRuleset updates the configuration and will take effect only
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// when applied on the system.
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func (c *Config) FlushRuleset() {
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c.Nftables = append(c.Nftables, schema.Nftable{Flush: &schema.Objects{Ruleset: true}})
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}
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