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/*
* 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 example
import (
"testing"
assert "github.com/stretchr/testify/require"
"github.com/networkplumbing/go-nft/tests/testlib"
"github.com/networkplumbing/go-nft/nft"
"github.com/networkplumbing/go-nft/nft/schema"
)
// TestNATExamples are based on the examples given at [1].
// 1. https://wiki.nftables.org/wiki-nftables/index.php/Performing_Network_Address_Translation_(NAT)
//
// The inet family is mentioned in [1]:
// "Since Linux kernel 5.2, there is support for performing stateful NAT in inet family chains.".
// Therefore, inet family is not used in this example.
func TestNATExamples(t *testing.T) {
testlib.RunTestWithFlushTable(t, testMasqueradeExample)
}
func testMasqueradeExample(t *testing.T) {
desiredJson, actualJson, err := setupExample(buildMasqueradeConfig)
assert.NoError(t, err)
assert.JSONEq(t, desiredJson, actualJson)
}
func buildMasqueradeConfig() *nft.Config {
const (
ip4TableName = "ip4-masquerade-example"
ip6TableName = "ip6-masquerade-example"
baseChainName = "postrouting"
)
chainPriority := 100
return &nft.Config{schema.Root{Nftables: []schema.Nftable{
{Table: &schema.Table{Family: schema.FamilyIP, Name: ip4TableName}},
{Table: &schema.Table{Family: schema.FamilyIP6, Name: ip6TableName}},
{Chain: &schema.Chain{
Family: schema.FamilyIP,
Table: ip4TableName,
Name: baseChainName,
Type: schema.TypeNAT,
Hook: schema.HookPostRouting,
Prio: &chainPriority,
Policy: schema.PolicyAccept,
}},
{Chain: &schema.Chain{
Family: schema.FamilyIP6,
Table: ip6TableName,
Name: baseChainName,
Type: schema.TypeNAT,
Hook: schema.HookPostRouting,
Prio: &chainPriority,
Policy: schema.PolicyAccept,
}},
{Rule: &schema.Rule{
Family: schema.FamilyIP,
Table: ip4TableName,
Chain: baseChainName,
Expr: []schema.Statement{
{Nat: schema.Nat{Masquerade: &schema.Masquerade{Enabled: true}}},
},
Comment: "generic masquerade",
}},
{Rule: &schema.Rule{
Family: schema.FamilyIP6,
Table: ip6TableName,
Chain: baseChainName,
Expr: []schema.Statement{
{Nat: schema.Nat{Masquerade: &schema.Masquerade{Enabled: true}}},
},
Comment: "generic masquerade",
}},
}}}
}
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