48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
// +build linux
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// Copyright 2016 CNI 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 firewall
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import (
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"fmt"
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)
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// GetBackend retrieves a firewall backend for adding or removing firewall rules
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// on the system.
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// Valid backend names are firewalld, iptables, and none.
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// If the empty string is given, a firewalld backend will be returned if
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// firewalld is running, and an iptables backend will be returned otherwise.
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func GetBackend(backend string) (FirewallBackend, error) {
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switch backend {
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case "firewalld":
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return newFirewalldBackend()
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case "iptables":
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return newIptablesBackend()
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case "none":
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return newNoneBackend()
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case "":
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// Default to firewalld if it's running
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if isFirewalldRunning() {
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return newFirewalldBackend()
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}
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// Otherwise iptables
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return newIptablesBackend()
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default:
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return nil, fmt.Errorf("unrecognized firewall backend %q", backend)
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}
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}
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