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// Copyright 2017-2018 CNI 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 utils
import (
"fmt"
"math/rand"
"runtime"
"github.com/containernetworking/plugins/pkg/ns"
"github.com/containernetworking/plugins/pkg/testutils"
"github.com/coreos/go-iptables/iptables"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
const TABLE = "filter" // We'll monkey around here
var _ = Describe("chain tests", func() {
var testChain string
var ipt *iptables.IPTables
var cleanup func()
BeforeEach(func() {
// Save a reference to the original namespace,
// Add a new NS
currNs, err := ns.GetCurrentNS()
Expect(err).NotTo(HaveOccurred())
testNs, err := testutils.NewNS()
Expect(err).NotTo(HaveOccurred())
testChain = fmt.Sprintf("cni-test-%d", rand.Intn(10000000))
ipt, err = iptables.NewWithProtocol(iptables.ProtocolIPv4)
Expect(err).NotTo(HaveOccurred())
runtime.LockOSThread()
err = testNs.Set()
Expect(err).NotTo(HaveOccurred())
cleanup = func() {
if ipt == nil {
return
}
ipt.ClearChain(TABLE, testChain)
ipt.DeleteChain(TABLE, testChain)
currNs.Set()
}
})
AfterEach(func() {
cleanup()
})
Describe("EnsureChain", func() {
It("creates chains idempotently", func() {
err := EnsureChain(ipt, TABLE, testChain)
Expect(err).NotTo(HaveOccurred())
// Create it again!
err = EnsureChain(ipt, TABLE, testChain)
Expect(err).NotTo(HaveOccurred())
})
})
Describe("DeleteChain", func() {
It("delete chains idempotently", func() {
// Create chain
err := EnsureChain(ipt, TABLE, testChain)
Expect(err).NotTo(HaveOccurred())
// Delete chain
err = DeleteChain(ipt, TABLE, testChain)
Expect(err).NotTo(HaveOccurred())
// Delete it again!
err = DeleteChain(ipt, TABLE, testChain)
Expect(err).NotTo(HaveOccurred())
})
})
})
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