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
|
// 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 main
import (
"fmt"
"github.com/osrg/gobgp/api"
"github.com/osrg/gobgp/gomrt/packet"
"github.com/spf13/cobra"
"golang.org/x/net/context"
"google.golang.org/grpc"
"io"
"net"
"os"
"time"
)
var globalOpts struct {
Host string
Port int
Input string
Count int
}
var client api.GrpcClient
func connGrpc() *grpc.ClientConn {
timeout := grpc.WithTimeout(time.Second)
// determine IP address version
host := net.ParseIP(globalOpts.Host)
target := fmt.Sprintf("%s:%d", globalOpts.Host, globalOpts.Port)
if host.To4() == nil {
target = fmt.Sprintf("[%s]:%d", globalOpts.Host, globalOpts.Port)
}
conn, err := grpc.Dial(target, timeout)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
return conn
}
func main() {
rootCmd := &cobra.Command{
Use: "gomrt",
PersistentPreRun: func(cmd *cobra.Command, args []string) {
conn := connGrpc()
client = api.NewGrpcClient(conn)
},
Run: func(cmd *cobra.Command, args []string) {
file, err := os.Open(globalOpts.Input)
if err != nil {
fmt.Println("failed to open file")
os.Exit(1)
}
idx := 0
ch := make(chan *api.Path, 1024)
go func() {
for {
buf := make([]byte, mrt.COMMON_HEADER_LEN)
_, err := file.Read(buf)
if err == io.EOF {
break
} else if err != nil {
fmt.Println("failed to read:", err)
os.Exit(1)
}
h := &mrt.Header{}
err = h.DecodeFromBytes(buf)
if err != nil {
fmt.Println("failed to parse")
os.Exit(1)
}
buf = make([]byte, h.Len)
_, err = file.Read(buf)
if err != nil {
fmt.Println("failed to read")
os.Exit(1)
}
msg, err := mrt.ParseBody(h, buf)
if err != nil {
fmt.Println("failed to parse:", err)
os.Exit(1)
}
if msg.Header.Type == mrt.TABLE_DUMPv2 {
subType := mrt.SubTypeTableDumpv2(msg.Header.SubType)
var af *api.AddressFamily
switch subType {
case mrt.PEER_INDEX_TABLE:
continue
case mrt.RIB_IPV4_UNICAST:
af = api.AF_IPV4_UC
case mrt.RIB_IPV6_UNICAST:
af = api.AF_IPV6_UC
default:
fmt.Println("unsupported subType:", subType)
os.Exit(1)
}
rib := msg.Body.(*mrt.Rib)
prefix := rib.Prefix.String()
path := &api.Path{}
path.Nlri = &api.Nlri{
Af: af,
Prefix: prefix,
}
ch <- path
}
idx += 1
if idx == globalOpts.Count {
break
}
}
close(ch)
}()
stream, err := client.ModPath(context.Background())
if err != nil {
fmt.Println("failed to modpath:", err)
os.Exit(1)
}
for path := range ch {
arg := &api.ModPathArguments{
Resource: api.Resource_GLOBAL,
Path: path,
}
err = stream.Send(arg)
if err != nil {
fmt.Println("failed to send:", err)
os.Exit(1)
}
}
res, err := stream.CloseAndRecv()
if err != nil {
fmt.Println("failed to send:", err)
os.Exit(1)
}
if res.Code != api.Error_SUCCESS {
fmt.Errorf("error: code: %d, msg: %s", res.Code, res.Msg)
os.Exit(1)
}
},
}
rootCmd.PersistentFlags().StringVarP(&globalOpts.Host, "host", "u", "127.0.0.1", "host")
rootCmd.PersistentFlags().IntVarP(&globalOpts.Port, "port", "p", 8080, "port")
rootCmd.Flags().StringVarP(&globalOpts.Input, "input", "i", "", "input mrt file")
rootCmd.Flags().IntVarP(&globalOpts.Count, "count", "c", -1, "how many mrt record you read")
rootCmd.Execute()
}
|
