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gdiazlo.tngl.sh
1package main
2
3import (
4 "fmt"
5 "net"
6
7 "github.com/hashicorp/go-msgpack/codec"
8)
9
10type ping struct {
11 SeqNo uint32
12 Node string
13 SourceAddr []byte
14 SourcePort uint16
15 SourceNode string
16}
17
18func main() {
19 conn, err := net.Dial("udp", "127.0.0.1:7946")
20 if err != nil {
21 panic(err)
22 }
23 defer conn.Close()
24
25 p := ping{
26 SeqNo: 1,
27 Node: "test-node",
28 SourceAddr: []byte{127, 0, 0, 1},
29 SourcePort: 7947,
30 SourceNode: "ocaml-node",
31 }
32
33 var buf []byte
34 enc := codec.NewEncoderBytes(&buf, &codec.MsgpackHandle{})
35 if err := enc.Encode(&p); err != nil {
36 panic(err)
37 }
38
39 msg := append([]byte{0}, buf...)
40 fmt.Printf("Sending %d bytes: %x\n", len(msg), msg)
41 fmt.Printf("Message type: 0 (ping)\n")
42 fmt.Printf("Msgpack payload: %x\n", buf)
43
44 n, err := conn.Write(msg)
45 if err != nil {
46 panic(err)
47 }
48 fmt.Printf("Sent %d bytes\n", n)
49}