143 lines
2.3 KiB
Go
143 lines
2.3 KiB
Go
package proxy
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import (
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"errors"
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"log"
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"net"
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"os"
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"os/signal"
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"sync"
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"syscall"
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)
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var runOnce sync.Once
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// Run initializes the proxy and starts the main listener loop.
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// It blocks forever.
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func Run() {
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runOnce.Do(runFunc)
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}
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func runFunc() {
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if !Conf().NoPlugins {
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loadPlugins()
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}
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var err error
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switch Conf().AuthBackend {
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case "files":
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setAuthBackend(authFiles{})
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default:
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log.Fatal("invalid auth backend")
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}
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if !Conf().NoTelnet {
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go func() {
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if err := telnetServer(); err != nil {
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log.Fatal(err)
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}
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}()
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}
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addr, err := net.ResolveUDPAddr("udp", Conf().BindAddr)
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if err != nil {
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log.Fatal(err)
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}
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pc, err := net.ListenUDP("udp", addr)
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if err != nil {
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log.Fatal(err)
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}
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l := listen(pc)
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defer l.Close()
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log.Println("listen", l.Addr())
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go func() {
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sig := make(chan os.Signal, 1)
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signal.Notify(sig, os.Interrupt, syscall.SIGTERM, syscall.SIGHUP)
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<-sig
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close(telnetCh)
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if Conf().List.Enable {
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if err := announce(listRm); err != nil {
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log.Print(err)
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}
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}
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clts := Clts()
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var wg sync.WaitGroup
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wg.Add(len(clts))
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for cc := range clts {
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go func(cc *ClientConn) {
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cc.Kick("Proxy shutting down.")
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<-cc.Closed()
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wg.Done()
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}(cc)
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}
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wg.Wait()
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os.Exit(0)
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}()
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for {
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cc, err := l.accept()
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if err != nil {
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if errors.Is(err, net.ErrClosed) {
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log.Print("stop listening")
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break
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}
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log.Print(err)
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continue
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}
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go func() {
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<-cc.Init()
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cc.Log("<->", "handshake completed")
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conf := Conf()
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if len(conf.Servers) == 0 {
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cc.Log("<-", "no servers")
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cc.Kick("No servers are configured.")
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return
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}
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srvName, srv := conf.DefaultServerInfo()
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lastSrv, err := authIface.LastSrv(cc.Name())
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if err == nil && !Conf().ForceDefaultSrv && lastSrv != srvName {
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for name, s := range conf.Servers {
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if name == lastSrv {
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srvName = name
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srv = s
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break
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}
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}
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}
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addr, err := net.ResolveUDPAddr("udp", srv.Addr)
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if err != nil {
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cc.Log("<-", "address resolution fail")
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cc.Kick("Server address resolution failed.")
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return
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}
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conn, err := net.DialUDP("udp", nil, addr)
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if err != nil {
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cc.Log("<-", "connection fail")
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cc.Kick("Server connection failed.")
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return
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}
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connect(conn, srvName, cc)
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}()
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}
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select {}
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}
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