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>
59 lines
1.7 KiB
Go
59 lines
1.7 KiB
Go
/*
|
|
* This file is part of the go-nft project
|
|
*
|
|
* 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.
|
|
*
|
|
* Copyright 2021 Red Hat, Inc.
|
|
*
|
|
*/
|
|
|
|
package nft
|
|
|
|
import (
|
|
"github.com/networkplumbing/go-nft/nft/schema"
|
|
)
|
|
|
|
// NewRule returns a new schema rule structure.
|
|
func NewRule(table *schema.Table, chain *schema.Chain, expr []schema.Statement, handle *int, index *int, comment string) *schema.Rule {
|
|
c := &schema.Rule{
|
|
Family: table.Family,
|
|
Table: table.Name,
|
|
Chain: chain.Name,
|
|
Expr: expr,
|
|
Handle: handle,
|
|
Index: index,
|
|
Comment: comment,
|
|
}
|
|
|
|
return c
|
|
}
|
|
|
|
type RuleIndex int
|
|
|
|
// NewRuleIndex returns a rule index object which acts as an iterator.
|
|
// When multiple rules are added to a chain, index allows to define an order between them.
|
|
// The first rule which is added to a chain should have no index (it is assigned index 0),
|
|
// following rules should have the index set, referencing after/before which rule the new one is to be added/inserted.
|
|
func NewRuleIndex() *RuleIndex {
|
|
var index RuleIndex = -1
|
|
return &index
|
|
}
|
|
|
|
// Next returns the next iteration value as an integer pointer.
|
|
// When first time called, it returns the value 0.
|
|
func (i *RuleIndex) Next() *int {
|
|
*i++
|
|
var index = int(*i)
|
|
return &index
|
|
}
|