mirror of https://github.com/ehang-io/nps
81 lines
1.6 KiB
Go
Executable File
81 lines
1.6 KiB
Go
Executable File
package main
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import (
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"io"
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"log"
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"net"
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"time"
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)
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type UdpModeServer struct {
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Tunnel
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udpPort int //监听的udp端口
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tunnelTarget string //udp目标地址
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listener *net.UDPConn
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udpMap map[string]*Conn
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}
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func NewUdpModeServer(tcpPort, udpPort int, tunnelTarget string) *UdpModeServer {
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s := new(UdpModeServer)
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s.tunnelPort = tcpPort
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s.udpPort = udpPort
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s.tunnelTarget = tunnelTarget
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s.tunnelList = make(chan *Conn, 1000)
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s.signalList = make(chan *Conn, 10)
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s.udpMap = make(map[string]*Conn)
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return s
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}
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//开始
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func (s *UdpModeServer) Start() (error) {
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err := s.StartTunnel()
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if err != nil {
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log.Fatalln("启动失败!", err)
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return err
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}
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s.startTunnelServer()
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return nil
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}
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//udp监听
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func (s *UdpModeServer) startTunnelServer() {
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s.listener, err = net.ListenUDP("udp", &net.UDPAddr{net.ParseIP("0.0.0.0"), s.udpPort, ""})
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if err != nil {
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log.Fatalln(err)
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}
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data := make([]byte, 1472) //udp数据包大小
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for {
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n, addr, err := s.listener.ReadFromUDP(data)
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if err != nil {
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log.Println(err)
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continue
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}
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go s.process(addr, data[:n])
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}
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}
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func (s *UdpModeServer) process(addr *net.UDPAddr, data []byte) {
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conn := s.GetTunnel()
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conn.WriteHost("udp", s.tunnelTarget)
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go func() {
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for {
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buf := make([]byte, 1024)
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conn.conn.SetReadDeadline(time.Now().Add(time.Duration(time.Second * 3)))
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n, err := conn.ReadFromCompress(buf, DataDecode)
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if err != nil || err == io.EOF {
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conn.Close()
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break
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}
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_, err = s.listener.WriteToUDP(buf[:n], addr)
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if err != nil {
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conn.Close()
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break
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}
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}
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}()
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if _, err = conn.WriteCompress(data, DataEncode); err != nil {
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conn.Close()
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}
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}
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