init

pkg/iptables/fake.go

@@ -0,0 +1,92 @@
+// 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 iptables
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/coreos/go-iptables/iptables"
+)
+
+type statusExiter interface {
+	ExitStatus() int
+}
+
+var _ statusExiter = (*iptables.Error)(nil)
+var _ statusExiter = statusError(0)
+
+type statusError int
+
+func (s statusError) Error() string {
+	return fmt.Sprintf("%d", s)
+}
+
+func (s statusError) ExitStatus() int {
+	return int(s)
+}
+
+type fakeClient map[string]Rule
+
+var _ iptablesClient = fakeClient(nil)
+
+func (f fakeClient) AppendUnique(table, chain string, spec ...string) error {
+	r := &rule{table, chain, spec, nil}
+	f[r.String()] = r
+	return nil
+}
+
+func (f fakeClient) Delete(table, chain string, spec ...string) error {
+	r := &rule{table, chain, spec, nil}
+	delete(f, r.String())
+	return nil
+}
+
+func (f fakeClient) Exists(table, chain string, spec ...string) (bool, error) {
+	r := &rule{table, chain, spec, nil}
+	_, ok := f[r.String()]
+	return ok, nil
+}
+
+func (f fakeClient) ClearChain(table, name string) error {
+	c := &chain{table, name, nil}
+	for k := range f {
+		if strings.HasPrefix(k, c.String()) {
+			delete(f, k)
+		}
+	}
+	f[c.String()] = c
+	return nil
+}
+
+func (f fakeClient) DeleteChain(table, name string) error {
+	c := &chain{table, name, nil}
+	for k := range f {
+		if strings.HasPrefix(k, c.String()) {
+			return fmt.Errorf("cannot delete chain %s; rules exist", name)
+		}
+	}
+	delete(f, c.String())
+	return nil
+}
+
+func (f fakeClient) NewChain(table, name string) error {
+	c := &chain{table, name, nil}
+	if _, ok := f[c.String()]; ok {
+		return statusError(1)
+	}
+	f[c.String()] = c
+	return nil
+}