clash/listener/tproxy/tproxy.go

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package tproxy
import (
"net"
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"github.com/Dreamacro/clash/adapter/inbound"
C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/transport/socks5"
)
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type Listener struct {
listener net.Listener
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addr string
closed bool
}
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// RawAddress implements C.Listener
func (l *Listener) RawAddress() string {
return l.addr
}
// Address implements C.Listener
func (l *Listener) Address() string {
return l.listener.Addr().String()
}
// Close implements C.Listener
func (l *Listener) Close() error {
l.closed = true
return l.listener.Close()
}
func (l *Listener) handleTProxy(conn net.Conn, in chan<- C.ConnContext) {
target := socks5.ParseAddrToSocksAddr(conn.LocalAddr())
conn.(*net.TCPConn).SetKeepAlive(true)
in <- inbound.NewSocket(target, conn, C.TPROXY)
}
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func New(addr string, in chan<- C.ConnContext) (*Listener, error) {
l, err := net.Listen("tcp", addr)
if err != nil {
return nil, err
}
tl := l.(*net.TCPListener)
rc, err := tl.SyscallConn()
if err != nil {
return nil, err
}
err = setsockopt(rc, addr)
if err != nil {
return nil, err
}
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rl := &Listener{
listener: l,
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addr: addr,
}
go func() {
for {
c, err := l.Accept()
if err != nil {
if rl.closed {
break
}
continue
}
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go rl.handleTProxy(c, in)
}
}()
return rl, nil
}