-
Notifications
You must be signed in to change notification settings - Fork 1k
/
main.go
80 lines (72 loc) · 1.58 KB
/
main.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
package main
import (
"crypto/rand"
"fmt"
"io"
"log"
"os"
ic "github.com/libp2p/go-libp2p/core/crypto"
"github.com/libp2p/go-libp2p/core/peer"
tpt "github.com/libp2p/go-libp2p/core/transport"
libp2pquic "github.com/libp2p/go-libp2p/p2p/transport/quic"
ma "github.com/multiformats/go-multiaddr"
)
func main() {
if len(os.Args) != 2 {
fmt.Printf("Usage: %s <port>", os.Args[0])
return
}
if err := run(os.Args[1]); err != nil {
log.Fatalf(err.Error())
}
}
func run(port string) error {
addr, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/0.0.0.0/udp/%s/quic", port))
if err != nil {
return err
}
priv, _, err := ic.GenerateECDSAKeyPair(rand.Reader)
if err != nil {
return err
}
peerID, err := peer.IDFromPrivateKey(priv)
if err != nil {
return err
}
t, err := libp2pquic.NewTransport(priv, nil, nil, nil)
if err != nil {
return err
}
ln, err := t.Listen(addr)
if err != nil {
return err
}
fmt.Printf("Listening. Now run: go run cmd/client/main.go %s %s\n", ln.Multiaddr(), peerID)
for {
conn, err := ln.Accept()
if err != nil {
return err
}
log.Printf("Accepted new connection from %s (%s)\n", conn.RemotePeer(), conn.RemoteMultiaddr())
go func() {
if err := handleConn(conn); err != nil {
log.Printf("handling conn failed: %s", err.Error())
}
}()
}
}
func handleConn(conn tpt.CapableConn) error {
str, err := conn.AcceptStream()
if err != nil {
return err
}
data, err := io.ReadAll(str)
if err != nil {
return err
}
log.Printf("Received: %s\n", data)
if _, err := str.Write(data); err != nil {
return err
}
return str.Close()
}