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table.go
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table.go
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/*
* Copyright 2018-2019, CS Systemes d'Information, http://www.c-s.fr
*
* 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 firewall
import (
"fmt"
"github.com/CS-SI/SafeScale/lib/utils/scerr"
"sync"
"github.com/CS-SI/SafeScale/lib/system/firewall/Policy"
)
// Table defines a table of the firewall
type Table struct {
Name string
Chains map[string]*Chain
lock sync.RWMutex
}
// NewChain creates a new
func (t *Table) NewChain(name string, policy Policy.Enum) *Chain {
chain := Chain{
Name: name,
Policy: policy,
}
t.Chains[name] = &chain
return &chain
}
// Chain returns the chain named 'name'
func (t *Table) Chain(name string) (*Chain, error) {
if name == "" {
return nil, scerr.InvalidParameterError("name", "cannot be empty!")
}
var chain *Chain
var found bool
if chain, found = t.Chains[name]; !found {
return nil, fmt.Errorf("table '%s' doesn't contain a chain '%s'", t.Name, name)
}
return chain, nil
}