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