56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
// Copyright 2019 the Kilo authors
|
|
//
|
|
// 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 encapsulation
|
|
|
|
import (
|
|
"net"
|
|
|
|
"github.com/squat/kilo/pkg/iptables"
|
|
)
|
|
|
|
// Strategy identifies which packets within a location should
|
|
// be encapsulated.
|
|
type Strategy string
|
|
|
|
const (
|
|
// Never indicates that no packets within a location
|
|
// should be encapsulated.
|
|
Never Strategy = "never"
|
|
// CrossSubnet indicates that only packets that
|
|
// traverse subnets within a location should be encapsulated.
|
|
CrossSubnet Strategy = "crosssubnet"
|
|
// Always indicates that all packets within a location
|
|
// should be encapsulated.
|
|
Always Strategy = "always"
|
|
)
|
|
|
|
// Encapsulator can:
|
|
// * configure the encapsulation interface;
|
|
// * determine the gateway IP corresponding to a node;
|
|
// * get the encapsulation interface index;
|
|
// * set the interface IP address;
|
|
// * return the required IPTables rules;
|
|
// * return the encapsulation strategy; and
|
|
// * clean up any changes applied to the backend.
|
|
type Encapsulator interface {
|
|
CleanUp() error
|
|
Gw(net.IP, net.IP, *net.IPNet) net.IP
|
|
Index() int
|
|
Init(int) error
|
|
Rules([]*net.IPNet) []iptables.Rule
|
|
Set(*net.IPNet) error
|
|
Strategy() Strategy
|
|
}
|