68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
package socks
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import (
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"bytes"
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"net"
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adapters "github.com/Dreamacro/clash/adapters/inbound"
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"github.com/Dreamacro/clash/common/pool"
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"github.com/Dreamacro/clash/component/socks5"
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C "github.com/Dreamacro/clash/constant"
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)
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type SockUDPListener struct {
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net.PacketConn
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address string
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closed bool
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}
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func NewSocksUDPProxy(addr string) (*SockUDPListener, error) {
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l, err := net.ListenPacket("udp", addr)
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if err != nil {
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return nil, err
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}
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sl := &SockUDPListener{l, addr, false}
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go func() {
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for {
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buf := pool.BufPool.Get().([]byte)
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n, remoteAddr, err := l.ReadFrom(buf)
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if err != nil {
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pool.BufPool.Put(buf[:cap(buf)])
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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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handleSocksUDP(l, buf[:n], remoteAddr)
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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 *SockUDPListener) Close() error {
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l.closed = true
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return l.PacketConn.Close()
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}
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func (l *SockUDPListener) Address() string {
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return l.address
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}
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func handleSocksUDP(pc net.PacketConn, buf []byte, addr net.Addr) {
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target, payload, err := socks5.DecodeUDPPacket(buf)
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if err != nil {
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// Unresolved UDP packet, return buffer to the pool
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pool.BufPool.Put(buf[:cap(buf)])
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return
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}
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conn := &fakeConn{
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PacketConn: pc,
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remoteAddr: addr,
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targetAddr: target,
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buffer: bytes.NewBuffer(payload),
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bufRef: buf,
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}
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tun.Add(adapters.NewSocket(target, conn, C.SOCKS, C.UDP))
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}
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