forked from fossabot/clash
/
tcp.go
62 lines (52 loc) · 996 Bytes
/
tcp.go
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package redir
import (
"net"
"github.com/Dreamacro/clash/adapters/local"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/tunnel"
log "github.com/sirupsen/logrus"
)
var (
tun = tunnel.Instance()
)
func NewRedirProxy(addr string) (*C.ProxySignal, error) {
l, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
done := make(chan struct{})
closed := make(chan struct{})
signal := &C.ProxySignal{
Done: done,
Closed: closed,
}
go func() {
log.Infof("Redir proxy listening at: %s", addr)
for {
c, err := l.Accept()
if err != nil {
if _, open := <-done; !open {
break
}
continue
}
go handleRedir(c)
}
}()
go func() {
<-done
close(done)
l.Close()
closed <- struct{}{}
}()
return signal, nil
}
func handleRedir(conn net.Conn) {
target, err := parserPacket(conn)
if err != nil {
conn.Close()
return
}
conn.(*net.TCPConn).SetKeepAlive(true)
tun.Add(adapters.NewSocket(target, conn))
}