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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
// 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 server
import (
"bufio"
"bytes"
"fmt"
log "github.com/Sirupsen/logrus"
"github.com/armon/go-radix"
api "github.com/osrg/gobgp/api"
"github.com/osrg/gobgp/config"
"github.com/osrg/gobgp/packet"
"github.com/osrg/gobgp/table"
"net"
"strconv"
"time"
)
type roa struct {
AS uint32
PrefixLen uint8
MaxLen uint8
Prefix net.IP
}
func (r *roa) key() string {
return fmt.Sprintf("%s/%d", r.Prefix.String(), r.PrefixLen)
}
func (r *roa) toApiStruct() *api.ROA {
return &api.ROA{
As: r.AS,
Prefixlen: uint32(r.PrefixLen),
Maxlen: uint32(r.MaxLen),
Prefix: r.Prefix.String(),
}
}
type roaClient struct {
roas map[bgp.RouteFamily]*radix.Tree
outgoing chan []byte
config config.RpkiServers
}
func (c *roaClient) recieveROA() chan []byte {
return c.outgoing
}
func roa2key(r *roa) string {
var buffer bytes.Buffer
for i := 0; i < len(r.Prefix) && i < int(r.PrefixLen); i++ {
buffer.WriteString(fmt.Sprintf("%08b", r.Prefix[i]))
}
return buffer.String()[:r.PrefixLen]
}
func (c *roaClient) handleRTRMsg(buf []byte) {
received := &c.config.RpkiServerList[0].RpkiServerState.RpkiMessages.RpkiReceived
m, _ := bgp.ParseRTR(buf)
if m != nil {
switch msg := m.(type) {
case *bgp.RTRSerialNotify:
received.SerialNotify++
case *bgp.RTRSerialQuery:
case *bgp.RTRResetQuery:
case *bgp.RTRCacheResponse:
received.CacheResponse++
case *bgp.RTRIPPrefix:
p := make([]byte, len(msg.Prefix))
copy(p, msg.Prefix)
r := &roa{
AS: msg.AS,
PrefixLen: msg.PrefixLen,
MaxLen: msg.MaxLen,
Prefix: p,
}
if r.Prefix.To4() != nil {
received.Ipv4Prefix++
c.roas[bgp.RF_IPv4_UC].Insert(roa2key(r), r)
} else {
received.Ipv6Prefix++
c.roas[bgp.RF_IPv6_UC].Insert(roa2key(r), r)
}
case *bgp.RTREndOfData:
received.EndOfData++
case *bgp.RTRCacheReset:
received.CacheReset++
case *bgp.RTRErrorReport:
}
} else {
received.Error++
}
}
func (c *roaClient) handleGRPC(grpcReq *GrpcRequest) {
switch grpcReq.RequestType {
case REQ_RPKI:
results := make([]*GrpcResponse, 0)
for _, s := range c.config.RpkiServerList {
state := &s.RpkiServerState
rpki := &api.RPKI{
Conf: &api.RPKIConf{
Address: s.RpkiServerConfig.Address.String(),
},
State: &api.RPKIState{
Uptime: state.Uptime,
ReceivedIpv4: int32(c.roas[bgp.RF_IPv4_UC].Len()),
ReceivedIpv6: int32(c.roas[bgp.RF_IPv6_UC].Len()),
},
}
result := &GrpcResponse{}
result.Data = rpki
results = append(results, result)
}
go sendMultipleResponses(grpcReq, results)
case REQ_ROA:
if len(c.config.RpkiServerList) == 0 || c.config.RpkiServerList[0].RpkiServerConfig.Address.String() != grpcReq.Name {
result := &GrpcResponse{}
result.ResponseErr = fmt.Errorf("RPKI server that has %v doesn't exist.", grpcReq.Name)
grpcReq.ResponseCh <- result
break
}
results := make([]*GrpcResponse, 0)
if tree, ok := c.roas[grpcReq.RouteFamily]; ok {
tree.Walk(func(s string, v interface{}) bool {
r, _ := v.(*roa)
result := &GrpcResponse{}
result.Data = r.toApiStruct()
results = append(results, result)
return false
})
}
go sendMultipleResponses(grpcReq, results)
}
}
func (c *roaClient) validate(pathList []*table.Path) {
for _, path := range pathList {
if tree, ok := c.roas[path.GetRouteFamily()]; ok {
_, n, _ := net.ParseCIDR(path.GetNlri().String())
ones, _ := n.Mask.Size()
var buffer bytes.Buffer
for i := 0; i < len(n.IP) && i < ones; i++ {
buffer.WriteString(fmt.Sprintf("%08b", n.IP[i]))
}
_, r, _ := tree.LongestPrefix(buffer.String()[:ones])
if r == nil {
path.Validation = config.RPKI_VALIDATION_RESULT_TYPE_NOT_FOUND
} else {
roa, _ := r.(*roa)
if roa.AS == path.GetSourceAs() {
path.Validation = config.RPKI_VALIDATION_RESULT_TYPE_VALID
} else {
path.Validation = config.RPKI_VALIDATION_RESULT_TYPE_INVALID
}
}
}
}
}
func newROAClient(conf config.RpkiServers) (*roaClient, error) {
var url string
c := &roaClient{
roas: make(map[bgp.RouteFamily]*radix.Tree),
config: conf,
}
c.roas[bgp.RF_IPv4_UC] = radix.New()
c.roas[bgp.RF_IPv6_UC] = radix.New()
if len(conf.RpkiServerList) == 0 {
return c, nil
} else {
if len(conf.RpkiServerList) > 1 {
log.Warn("currently only one RPKI server is supposed")
}
c := conf.RpkiServerList[0].RpkiServerConfig
url = net.JoinHostPort(c.Address.String(), strconv.Itoa(int(c.Port)))
}
conn, err := net.Dial("tcp", url)
if err != nil {
return c, err
}
state := &conf.RpkiServerList[0].RpkiServerState
state.Uptime = time.Now().Unix()
r := bgp.NewRTRResetQuery()
data, _ := r.Serialize()
conn.Write(data)
state.RpkiMessages.RpkiSent.ResetQuery++
reader := bufio.NewReader(conn)
scanner := bufio.NewScanner(reader)
scanner.Split(bgp.SplitRTR)
ch := make(chan []byte)
c.outgoing = ch
go func(ch chan []byte) {
for scanner.Scan() {
ch <- scanner.Bytes()
}
}(ch)
return c, nil
}
|
