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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
// Copyright (C) 2015 Nippon Telegraph and Telephone Corporation.
//
// 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 config
import (
"fmt"
"net"
"path/filepath"
"regexp"
"strconv"
"github.com/osrg/gobgp/packet/bgp"
)
// Returns config file type by retrieving extension from the given path.
// If no corresponding type found, returns the given def as the default value.
func detectConfigFileType(path, def string) string {
switch ext := filepath.Ext(path); ext {
case ".toml":
return "toml"
case ".yaml", ".yml":
return "yaml"
case ".json":
return "json"
default:
return def
}
}
func IsConfederationMember(g *Global, p *Neighbor) bool {
if p.Config.PeerAs != g.Config.As {
for _, member := range g.Confederation.Config.MemberAsList {
if member == p.Config.PeerAs {
return true
}
}
}
return false
}
func IsEBGPPeer(g *Global, p *Neighbor) bool {
return p.Config.PeerAs != g.Config.As
}
type AfiSafis []AfiSafi
func (c AfiSafis) ToRfList() ([]bgp.RouteFamily, error) {
rfs := make([]bgp.RouteFamily, 0, len(c))
for _, rf := range c {
k, err := bgp.GetRouteFamily(string(rf.Config.AfiSafiName))
if err != nil {
return nil, fmt.Errorf("invalid address family: %s", rf.Config.AfiSafiName)
}
rfs = append(rfs, k)
}
return rfs, nil
}
func CreateRfMap(p *Neighbor) map[bgp.RouteFamily]bgp.BGPAddPathMode {
rfs, _ := AfiSafis(p.AfiSafis).ToRfList()
mode := bgp.BGP_ADD_PATH_NONE
if p.AddPaths.Config.Receive {
mode |= bgp.BGP_ADD_PATH_RECEIVE
}
if p.AddPaths.Config.SendMax > 0 {
mode |= bgp.BGP_ADD_PATH_SEND
}
rfMap := make(map[bgp.RouteFamily]bgp.BGPAddPathMode)
for _, rf := range rfs {
rfMap[rf] = mode
}
return rfMap
}
func GetAfiSafi(p *Neighbor, family bgp.RouteFamily) *AfiSafi {
for _, a := range p.AfiSafis {
if string(a.Config.AfiSafiName) == family.String() {
return &a
}
}
return nil
}
func CheckAfiSafisChange(x, y []AfiSafi) bool {
if len(x) != len(y) {
return true
}
m := make(map[string]bool)
for _, e := range x {
m[string(e.Config.AfiSafiName)] = true
}
for _, e := range y {
if !m[string(e.Config.AfiSafiName)] {
return true
}
}
return false
}
func ParseMaskLength(prefix, mask string) (int, int, error) {
_, ipNet, err := net.ParseCIDR(prefix)
if err != nil {
return 0, 0, fmt.Errorf("invalid prefix: %s", prefix)
}
if mask == "" {
l, _ := ipNet.Mask.Size()
return l, l, nil
}
exp := regexp.MustCompile("(\\d+)\\.\\.(\\d+)")
elems := exp.FindStringSubmatch(mask)
if len(elems) != 3 {
return 0, 0, fmt.Errorf("invalid mask length range: %s", mask)
}
// we've already checked the range is sane by regexp
min, _ := strconv.Atoi(elems[1])
max, _ := strconv.Atoi(elems[2])
if min > max {
return 0, 0, fmt.Errorf("invalid mask length range: %s", mask)
}
if ipv4 := ipNet.IP.To4(); ipv4 != nil {
f := func(i int) bool {
return i >= 0 && i <= 32
}
if !f(min) || !f(max) {
return 0, 0, fmt.Errorf("ipv4 mask length range outside scope :%s", mask)
}
} else {
f := func(i int) bool {
return i >= 0 && i <= 128
}
if !f(min) || !f(max) {
return 0, 0, fmt.Errorf("ipv6 mask length range outside scope :%s", mask)
}
}
return min, max, nil
}
func ExtractNeighborAddress(c *Neighbor) (string, error) {
addr := c.State.NeighborAddress
if addr == "" {
addr = c.Config.NeighborAddress
if addr == "" {
return "", fmt.Errorf("NeighborAddress is not configured")
}
}
return addr, nil
}
|
