ceremonyclient/go-libp2p/p2p/transport/quic/cmd/lib/lib.go

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2024-06-08 11:32:45 +00:00
package cmdlib
import (
"context"
"crypto/rand"
"fmt"
"io"
"log"
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"
"github.com/libp2p/go-libp2p/p2p/transport/quicreuse"
ma "github.com/multiformats/go-multiaddr"
"github.com/quic-go/quic-go"
)
func RunClient(raddr string, p string) error {
peerID, err := peer.Decode(p)
if err != nil {
return err
}
addr, err := ma.NewMultiaddr(raddr)
if err != nil {
return err
}
priv, _, err := ic.GenerateECDSAKeyPair(rand.Reader)
if err != nil {
return err
}
reuse, err := quicreuse.NewConnManager(quic.StatelessResetKey{}, quic.TokenGeneratorKey{})
if err != nil {
return err
}
t, err := libp2pquic.NewTransport(priv, reuse, nil, nil, nil)
if err != nil {
return err
}
log.Printf("Dialing %s\n", addr.String())
conn, err := t.Dial(context.Background(), addr, peerID)
if err != nil {
return err
}
defer conn.Close()
str, err := conn.OpenStream(context.Background())
if err != nil {
return err
}
defer str.Close()
const msg = "Hello world!"
log.Printf("Sending: %s\n", msg)
if _, err := str.Write([]byte(msg)); err != nil {
return err
}
if err := str.CloseWrite(); err != nil {
return err
}
data, err := io.ReadAll(str)
if err != nil {
return err
}
log.Printf("Received: %s\n", data)
return nil
}
func RunServer(port string, location chan peer.AddrInfo) error {
addr, err := ma.NewMultiaddr(fmt.Sprintf("/ip4/0.0.0.0/udp/%s/quic-v1", 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
}
reuse, err := quicreuse.NewConnManager(quic.StatelessResetKey{}, quic.TokenGeneratorKey{})
if err != nil {
return err
}
t, err := libp2pquic.NewTransport(priv, reuse, 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)
if location != nil {
location <- peer.AddrInfo{ID: peerID, Addrs: []ma.Multiaddr{ln.Multiaddr()}}
}
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()
}