forked from scionproto/scion
-
Notifications
You must be signed in to change notification settings - Fork 0
/
braddr.go
200 lines (183 loc) · 5.17 KB
/
braddr.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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
// Copyright 2018 ETH Zurich
//
// 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 topology
import (
"fmt"
"strings"
"github.com/scionproto/scion/go/lib/addr"
"github.com/scionproto/scion/go/lib/common"
"github.com/scionproto/scion/go/lib/overlay"
)
type TopoBRAddr struct {
IPv4 *OverBindAddr
IPv6 *OverBindAddr
Overlay overlay.Type
}
// Create TopoAddr from RawAddrMap, depending on supplied Overlay type
func topoBRAddrFromRBRAM(s RawBRAddrMap, ot overlay.Type) (*TopoBRAddr, error) {
if err := overlayCheck(ot); err != nil {
return nil, err
}
t := &TopoBRAddr{Overlay: ot}
if err := t.fromRaw(s); err != nil {
return nil, common.NewBasicError("Failed to parse raw topo address", err, "addr", s)
}
return t, nil
}
func (t *TopoBRAddr) fromRaw(s RawBRAddrMap) error {
for k, rob := range s {
var hostType addr.HostAddrType
ob := &OverBindAddr{}
switch k {
case "IPv4":
if !t.Overlay.IsIPv4() {
return common.NewBasicError(ErrMismatchOverlayAddr, nil, "Overlay", t.Overlay)
}
t.IPv4 = ob
hostType = addr.HostTypeIPv4
case "IPv6":
if !t.Overlay.IsIPv6() {
return common.NewBasicError(ErrMismatchOverlayAddr, nil, "Overlay", t.Overlay)
}
t.IPv6 = ob
hostType = addr.HostTypeIPv6
default:
return common.NewBasicError(ErrUnsupportedAddrType, nil, "Type", k)
}
if err := ob.fromRaw(rob, t.Overlay.IsUDP()); err != nil {
return err
}
// Check parsed addresses match the expected address type
if ob.PublicOverlay.L3().Type() != hostType {
return common.NewBasicError(ErrMismatchPubAddrType, nil,
"AddrType", hostType, "Addr", ob.PublicOverlay)
}
if ob.BindOverlay != nil {
if ob.BindOverlay.L3().Type() != hostType {
return common.NewBasicError(ErrMismatchBindAddrType, nil,
"AddrType", hostType, "Addr", ob.BindOverlay)
}
// Check PublicOverlay and BindOverlay are not the same address
if ob.PublicOverlay.Equal(ob.BindOverlay) {
return common.NewBasicError(ErrBindAddrEqPubAddr, nil,
"BindOverlayAddr", ob.BindOverlay, "PublicOverlayAddr", ob.PublicOverlay)
}
}
}
if t.IPv4 == nil && t.IPv6 == nil {
// Both are empty.
return common.NewBasicError(ErrAtLeastOnePub, nil)
}
return nil
}
func (t *TopoBRAddr) PublicOverlay(ot overlay.Type) *overlay.OverlayAddr {
if oba := t.getAddr(ot); oba != nil {
return oba.PublicOverlay
}
return nil
}
func (t *TopoBRAddr) BindOverlay(ot overlay.Type) *overlay.OverlayAddr {
if oba := t.getAddr(ot); oba != nil {
return oba.BindOverlay
}
return nil
}
func (t *TopoBRAddr) BindOrPublicOverlay(ot overlay.Type) *overlay.OverlayAddr {
if oba := t.getAddr(ot); oba != nil {
return oba.BindOrPublicOverlay()
}
return nil
}
func (t *TopoBRAddr) getAddr(ot overlay.Type) *OverBindAddr {
if t == nil {
return nil
}
if t.IPv6 != nil && ot.IsIPv6() {
return t.IPv6
}
if t.IPv4 != nil && ot.IsIPv4() {
return t.IPv4
}
return nil
}
func (t *TopoBRAddr) Equal(o *TopoBRAddr) bool {
if t == nil || o == nil {
return t == o
}
if t.Overlay != o.Overlay {
return false
}
if !t.IPv4.Equal(o.IPv4) {
return false
}
if !t.IPv6.Equal(o.IPv6) {
return false
}
return true
}
func (t *TopoBRAddr) String() string {
var s []string
s = append(s, "TopoBRAddr{")
if t.IPv4 != nil {
s = append(s, fmt.Sprintf("IPv4:{%s},", t.IPv4))
}
if t.IPv6 != nil {
s = append(s, fmt.Sprintf("IPv6:{%s},", t.IPv6))
}
s = append(s, fmt.Sprintf("Overlay: %s}", t.Overlay))
return strings.Join(s, "")
}
type OverBindAddr struct {
PublicOverlay *overlay.OverlayAddr
BindOverlay *overlay.OverlayAddr
}
func (ob *OverBindAddr) fromRaw(rob *RawOverlayBind, udpOverlay bool) error {
l3 := addr.HostFromIPStr(rob.PublicOverlay.Addr)
if l3 == nil {
return common.NewBasicError(ErrInvalidPub, nil, "ip", rob.PublicOverlay.Addr)
}
ob.PublicOverlay = overlay.NewOverlayAddr(l3.IP(), uint16(rob.PublicOverlay.OverlayPort))
if rob.BindOverlay != nil {
l3 := addr.HostFromIPStr(rob.BindOverlay.Addr)
if l3 == nil {
return common.NewBasicError(ErrInvalidBind, nil, "ip", rob.BindOverlay.Addr)
}
ob.BindOverlay = overlay.NewOverlayAddr(l3.IP(), uint16(rob.PublicOverlay.OverlayPort))
}
return nil
}
func (t *OverBindAddr) BindOrPublicOverlay() *overlay.OverlayAddr {
if t.BindOverlay != nil {
return t.BindOverlay
}
return t.PublicOverlay
}
func (t1 *OverBindAddr) Equal(t2 *OverBindAddr) bool {
if (t1 == nil) && (t2 == nil) {
return true
}
if (t1 == nil) != (t2 == nil) {
return false
}
if !t1.PublicOverlay.Equal(t2.PublicOverlay) {
return false
}
if !t1.BindOverlay.Equal(t2.BindOverlay) {
return false
}
return true
}
func (a *OverBindAddr) String() string {
return fmt.Sprintf("PublicOverlay: %v BindOverlay: %v", a.PublicOverlay, a.BindOverlay)
}