70 lines
1.3 KiB
Go
70 lines
1.3 KiB
Go
package socks
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import (
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"io"
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"io/ioutil"
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"net"
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adapters "github.com/Dreamacro/clash/adapters/inbound"
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"github.com/Dreamacro/clash/component/socks5"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/log"
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authStore "github.com/Dreamacro/clash/proxy/auth"
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"github.com/Dreamacro/clash/tunnel"
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)
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type SockListener struct {
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net.Listener
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address string
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closed bool
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}
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func NewSocksProxy(addr string) (*SockListener, error) {
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l, err := net.Listen("tcp", addr)
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if err != nil {
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return nil, err
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}
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sl := &SockListener{l, addr, false}
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go func() {
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log.Infoln("SOCKS proxy listening at: %s", addr)
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for {
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c, err := l.Accept()
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if err != nil {
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if sl.closed {
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break
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}
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continue
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}
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go HandleSocks(c)
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}
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}()
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return sl, nil
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}
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func (l *SockListener) Close() {
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l.closed = true
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l.Listener.Close()
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}
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func (l *SockListener) Address() string {
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return l.address
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}
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func HandleSocks(conn net.Conn) {
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target, command, err := socks5.ServerHandshake(conn, authStore.Authenticator())
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if err != nil {
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conn.Close()
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return
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}
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if c, ok := conn.(*net.TCPConn); ok {
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c.SetKeepAlive(true)
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}
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if command == socks5.CmdUDPAssociate {
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defer conn.Close()
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io.Copy(ioutil.Discard, conn)
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return
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}
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tunnel.Add(adapters.NewSocket(target, conn, C.SOCKS))
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}
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