80 lines
1.5 KiB
Go
80 lines
1.5 KiB
Go
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package tunnel
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import (
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"net"
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"github.com/Dreamacro/clash/adapter/inbound"
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"github.com/Dreamacro/clash/common/pool"
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C "github.com/Dreamacro/clash/constant"
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"github.com/Dreamacro/clash/log"
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"github.com/Dreamacro/clash/transport/socks5"
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)
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type UdpListener struct {
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closed bool
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config string
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listeners []net.PacketConn
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}
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func NewUdp(config string, in chan<- *inbound.PacketAdapter) (*UdpListener, error) {
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ul := &UdpListener{false, config, nil}
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pl := PairList{}
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err := pl.Set(config)
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if err != nil {
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return nil, err
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}
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for _, p := range pl {
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addr := p[0]
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target := p[1]
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go func() {
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tgt := socks5.ParseAddr(target)
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if tgt == nil {
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log.Errorln("invalid target address %q", target)
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return
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}
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l, err := net.ListenPacket("udp", addr)
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if err != nil {
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return
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}
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ul.listeners = append(ul.listeners, l)
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log.Infoln("Udp tunnel %s <-> %s", l.LocalAddr().String(), target)
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for {
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buf := pool.Get(pool.RelayBufferSize)
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n, remoteAddr, err := l.ReadFrom(buf)
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if err != nil {
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pool.Put(buf)
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if ul.closed {
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break
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}
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continue
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}
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packet := &packet{
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pc: l,
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rAddr: remoteAddr,
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payload: buf[:n],
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bufRef: buf,
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}
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select {
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case in <- inbound.NewPacket(tgt, packet, C.UDPTUN):
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default:
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}
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}
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}()
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}
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return ul, nil
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}
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func (l *UdpListener) Close() {
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l.closed = true
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for _, lis := range l.listeners {
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_ = lis.Close()
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}
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}
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func (l *UdpListener) Config() string {
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return l.config
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}
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