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direct.go
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direct.go
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package easyss
import (
"context"
"io"
"net"
"sync"
"time"
"github.com/nange/easyss/v2/log"
"github.com/xjasonlyu/tun2socks/v2/dialer"
)
func (ss *Easyss) directRelay(localConn net.Conn, addr string) error {
log.Info("[TCP_DIRECT]", "target", addr)
tConn, err := ss.directTCPConn(addr)
if err != nil {
log.Warn("[TCP_DIRECT]", "dial", addr, "err", err)
return err
}
wg := sync.WaitGroup{}
wg.Add(2)
go func() {
defer wg.Done()
_, err := io.Copy(tConn, localConn)
if err != nil && !ErrorCanIgnore(err) {
log.Warn("[TCP_DIRECT] copy from local to remote", "err", err)
}
if err := CloseWrite(tConn); err != nil {
log.Warn("[TCP_DIRECT] close write for target connection", "err", err)
}
_ = tConn.SetReadDeadline(time.Now().Add(ss.ReadDeadlineTimeout()))
}()
go func() {
defer wg.Done()
_, err := io.Copy(localConn, tConn)
if err != nil && !ErrorCanIgnore(err) {
log.Warn("[TCP_DIRECT] copy from remote to local", "err", err)
}
if err := CloseWrite(localConn); err != nil {
log.Warn("[TCP_DIRECT] close write for local connection", "err", err)
}
_ = localConn.SetReadDeadline(time.Now().Add(ss.ReadDeadlineTimeout()))
}()
wg.Wait()
return nil
}
func (ss *Easyss) directTCPConn(addr string) (net.Conn, error) {
var tConn net.Conn
var err error
network := "tcp"
if ss.DisableIPV6() {
network = "tcp4"
}
if ss.EnabledTun2socks() {
ctx, cancel := context.WithTimeout(context.Background(), ss.Timeout())
defer cancel()
tConn, err = dialer.DialContextWithOptions(ctx, network, addr, &dialer.Options{
InterfaceName: ss.LocalDevice(),
InterfaceIndex: ss.LocalDeviceIndex(),
})
} else {
tConn, err = net.DialTimeout(network, addr, ss.Timeout())
}
return tConn, err
}