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keys.go
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keys.go
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// Copyright (c) 2018 Cisco and/or its affiliates.
//
// 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 vpp_acl
import (
"strings"
"github.com/ligato/vpp-agent/pkg/models"
)
// ModuleName is the module name used for models.
const ModuleName = "vpp.acls"
var (
ModelACL = models.Register(&ACL{}, models.Spec{
Module: ModuleName,
Version: "v2",
Type: "acl",
})
)
// Key returns the prefix used in ETCD to store vpp ACL config
// of a particular ACL in selected vpp instance.
func Key(aclName string) string {
return models.Key(&ACL{
Name: aclName,
})
}
const (
aclToInterfaceTemplate = "vpp/acl/{acl}/interface/{flow}/{iface}"
// IngressFlow represents ingress packet flow
IngressFlow = "ingress"
// EgressFlow represents egress packet flow
EgressFlow = "egress"
)
const (
// InvalidKeyPart is used in key for parts which are invalid
InvalidKeyPart = "<invalid>"
)
// ToInterfaceKey returns key for ACL to interface
func ToInterfaceKey(acl, iface, flow string) string {
if acl == "" {
acl = InvalidKeyPart
}
if iface == "" {
iface = InvalidKeyPart
}
if flow != IngressFlow && flow != EgressFlow {
flow = InvalidKeyPart
}
key := aclToInterfaceTemplate
key = strings.Replace(key, "{acl}", acl, 1)
key = strings.Replace(key, "{flow}", flow, 1)
key = strings.Replace(key, "{iface}", iface, 1)
return key
}
// ParseACLToInterfaceKey parses ACL to interface key
func ParseACLToInterfaceKey(key string) (acl, iface, flow string, isACLToInterface bool) {
parts := strings.Split(key, "/")
if len(parts) >= 6 &&
parts[0] == "vpp" && parts[1] == "acl" && parts[3] == "interface" &&
(parts[4] == IngressFlow || parts[4] == EgressFlow || parts[4] == InvalidKeyPart) {
acl = parts[2]
iface = strings.Join(parts[5:], "/")
if iface != "" && acl != "" {
return acl, iface, parts[4], true
}
}
return "", "", "", false
}