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53 lines
1.1 KiB
53 lines
1.1 KiB
package socks
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import (
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"net"
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"github.com/v2ray/v2ray-core/common/log"
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v2net "github.com/v2ray/v2ray-core/common/net"
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"github.com/v2ray/v2ray-core/proxy/socks/protocol"
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)
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const (
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bufferSize = 2 * 1024
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)
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func (server *SocksServer) ListenUDP(port uint16) error {
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addr := &net.UDPAddr{
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IP: net.IP{0, 0, 0, 0},
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Port: int(port),
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Zone: "",
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}
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conn, err := net.ListenUDP("udp", addr)
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if err != nil {
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log.Error("Socks failed to listen UDP on port %d: %v", port, err)
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return err
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}
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go server.AcceptPackets(conn)
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return nil
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}
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func (server *SocksServer) AcceptPackets(conn *net.UDPConn) error {
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for {
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buffer := make([]byte, 0, bufferSize)
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nBytes, _, err := conn.ReadFromUDP(buffer)
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if err != nil {
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log.Error("Socks failed to read UDP packets: %v", err)
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return err
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}
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request, err := protocol.ReadUDPRequest(buffer[:nBytes])
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if err != nil {
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log.Error("Socks failed to parse UDP request: %v", err)
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return err
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}
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if request.Fragment != 0 {
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// TODO handle fragments
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continue
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}
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udpPacket := v2net.NewUDPPacket(request.Destination(), request.Data)
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server.vPoint.DispatchToOutbound(udpPacket)
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}
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}
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