103 lines
1.7 KiB
Go
103 lines
1.7 KiB
Go
package peer
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
"log/slog"
|
|
"net"
|
|
"sync"
|
|
|
|
"github.com/shadowsocks/go-shadowsocks2/core"
|
|
)
|
|
|
|
const (
|
|
tcpNetwork = "tcp"
|
|
bufferSize = 32 * 1024 // 32KB
|
|
)
|
|
|
|
// Ошибки подключения
|
|
var (
|
|
ErrNotConnected = errors.New("peer is not connected")
|
|
)
|
|
|
|
type Peer struct {
|
|
pubKey string
|
|
connEncrypted net.Conn
|
|
mu sync.Mutex
|
|
active bool
|
|
}
|
|
|
|
func NewPeer(pubKey string) *Peer {
|
|
return &Peer{
|
|
pubKey: pubKey,
|
|
active: false,
|
|
}
|
|
}
|
|
|
|
func (p *Peer) Connect(ip, port string) error {
|
|
p.mu.Lock()
|
|
defer p.mu.Unlock()
|
|
|
|
if p.active {
|
|
return nil // Уже подключен
|
|
}
|
|
|
|
conn, err := net.Dial(tcpNetwork, net.JoinHostPort(ip, port))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
cipher, err := core.PickCipher("AEAD_CHACHA20_POLY1305", []byte(p.pubKey), "")
|
|
if err != nil {
|
|
conn.Close()
|
|
return err
|
|
}
|
|
|
|
p.connEncrypted = cipher.StreamConn(conn)
|
|
p.active = true
|
|
return nil
|
|
}
|
|
|
|
func (p *Peer) Disconnect() error {
|
|
p.mu.Lock()
|
|
defer p.mu.Unlock()
|
|
|
|
if !p.active {
|
|
return nil
|
|
}
|
|
|
|
err := p.connEncrypted.Close()
|
|
p.active = false
|
|
return err
|
|
}
|
|
|
|
func (p *Peer) Start(localClient net.Conn) error {
|
|
if !p.active {
|
|
return ErrNotConnected
|
|
}
|
|
|
|
var wg sync.WaitGroup
|
|
wg.Add(2)
|
|
|
|
// Логика проксирования в обе стороны
|
|
go p.pipeData(localClient, p.connEncrypted, &wg)
|
|
go p.pipeData(p.connEncrypted, localClient, &wg)
|
|
|
|
wg.Wait()
|
|
return nil
|
|
}
|
|
|
|
func (p *Peer) pipeData(src, dst net.Conn, wg *sync.WaitGroup) {
|
|
defer wg.Done()
|
|
|
|
buf := make([]byte, bufferSize)
|
|
_, err := io.CopyBuffer(dst, src, buf)
|
|
if err != nil {
|
|
slog.Warn("pipe data error", slog.String("message", err.Error()))
|
|
}
|
|
|
|
// Закрываем соединения при завершении
|
|
src.Close()
|
|
dst.Close()
|
|
}
|