forked from ligato/vpp-agent
-
Notifications
You must be signed in to change notification settings - Fork 0
/
spd_interface.go
139 lines (120 loc) · 4.43 KB
/
spd_interface.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
// 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 descriptor
import (
"strconv"
"github.com/go-errors/errors"
"github.com/gogo/protobuf/proto"
"github.com/ligato/cn-infra/logging"
interfaces "github.com/ligato/vpp-agent/api/models/vpp/interfaces"
ipsec "github.com/ligato/vpp-agent/api/models/vpp/ipsec"
kvs "github.com/ligato/vpp-agent/plugins/kvscheduler/api"
"github.com/ligato/vpp-agent/plugins/vpp/ipsecplugin/descriptor/adapter"
"github.com/ligato/vpp-agent/plugins/vpp/ipsecplugin/vppcalls"
)
const (
// SPDInterfaceDescriptorName is the name of the descriptor for bindings between
// VPP IPSec security policy database and interfaces.
SPDInterfaceDescriptorName = "vpp-spd-interface"
// dependency labels
interfaceDep = "interface-exists"
)
// SPDInterfaceDescriptor teaches KVScheduler how to put interface into VPP
// security policy database
type SPDInterfaceDescriptor struct {
// dependencies
log logging.Logger
ipSecHandler vppcalls.IPSecVppAPI
}
// NewSPDInterfaceDescriptor creates a new instance of the SPDInterface descriptor.
func NewSPDInterfaceDescriptor(ipSecHandler vppcalls.IPSecVppAPI, log logging.PluginLogger) *SPDInterfaceDescriptor {
return &SPDInterfaceDescriptor{
log: log.NewLogger("spd-interface-descriptor"),
ipSecHandler: ipSecHandler,
}
}
// GetDescriptor returns descriptor suitable for registration (via adapter) with
// the KVScheduler.
func (d *SPDInterfaceDescriptor) GetDescriptor() *adapter.SPDInterfaceDescriptor {
return &adapter.SPDInterfaceDescriptor{
Name: SPDInterfaceDescriptorName,
KeySelector: d.IsSPDInterfaceKey,
ValueTypeName: proto.MessageName(&ipsec.SecurityPolicyDatabase{}),
Create: d.Create,
Delete: d.Delete,
Dependencies: d.Dependencies,
}
}
// IsSPDInterfaceKey returns true if the key is identifying binding between
// VPP security policy database and interface.
func (d *SPDInterfaceDescriptor) IsSPDInterfaceKey(key string) bool {
_, _, isSPDIfaceKey := ipsec.ParseSPDInterfaceKey(key)
return isSPDIfaceKey
}
// Create puts interface into security policy database.
func (d *SPDInterfaceDescriptor) Create(key string, spdIf *ipsec.SecurityPolicyDatabase_Interface) (metadata interface{}, err error) {
// get security policy database index
spdIdx, _, isSPDIfKey := ipsec.ParseSPDInterfaceKey(key)
if !isSPDIfKey {
err = errors.Errorf("provided key is not a derived SPD <=> interface binding key %s", key)
d.log.Error(err)
return nil, err
}
// convert to numeric index
spdID, err := strconv.Atoi(spdIdx)
if err != nil {
err = errors.Errorf("provided SPD index is not a valid value %s", spdIdx)
d.log.Error(err)
return nil, err
}
// put interface into the security policy database
err = d.ipSecHandler.AddSPDInterface(uint32(spdID), spdIf)
if err != nil {
d.log.Error(err)
return nil, err
}
return nil, nil
}
// Delete removes interface from security policy database.
func (d *SPDInterfaceDescriptor) Delete(key string, spdIf *ipsec.SecurityPolicyDatabase_Interface, metadata interface{}) (err error) {
// get security policy database index
spdIdx, _, isSPDIfKey := ipsec.ParseSPDInterfaceKey(key)
if !isSPDIfKey {
err = errors.Errorf("provided key is not a derived SPD <=> interface binding key %s", key)
d.log.Error(err)
return err
}
// convert to numeric index
spdID, err := strconv.Atoi(spdIdx)
if err != nil {
err = errors.Errorf("provided SPD index is not a valid value %s", spdIdx)
d.log.Error(err)
return err
}
err = d.ipSecHandler.DeleteSPDInterface(uint32(spdID), spdIf)
if err != nil {
d.log.Error(err)
return err
}
return nil
}
// Dependencies lists the interface as the only dependency for the binding.
func (d *SPDInterfaceDescriptor) Dependencies(key string, value *ipsec.SecurityPolicyDatabase_Interface) []kvs.Dependency {
return []kvs.Dependency{
{
Label: interfaceDep,
Key: interfaces.InterfaceKey(value.Name),
},
}
}