120 lines
2.2 KiB
Go
120 lines
2.2 KiB
Go
package serial
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import (
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"context"
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"net"
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"time"
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"github.com/go-gost/core/listener"
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"github.com/go-gost/core/logger"
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md "github.com/go-gost/core/metadata"
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serial "github.com/go-gost/x/internal/util/serial"
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limiter "github.com/go-gost/x/limiter/traffic/wrapper"
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metrics "github.com/go-gost/x/metrics/wrapper"
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stats "github.com/go-gost/x/observer/stats/wrapper"
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"github.com/go-gost/x/registry"
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)
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func init() {
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registry.ListenerRegistry().Register("serial", NewListener)
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}
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type serialListener struct {
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cqueue chan net.Conn
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closed chan struct{}
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addr net.Addr
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logger logger.Logger
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md metadata
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options listener.Options
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}
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func NewListener(opts ...listener.Option) listener.Listener {
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options := listener.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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if options.Addr == "" {
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options.Addr = serial.DefaultPort
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}
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return &serialListener{
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logger: options.Logger,
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options: options,
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}
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}
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func (l *serialListener) Init(md md.Metadata) (err error) {
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if err = l.parseMetadata(md); err != nil {
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return
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}
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l.addr = &serial.Addr{Port: l.options.Addr}
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l.cqueue = make(chan net.Conn)
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l.closed = make(chan struct{})
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go l.listenLoop()
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return
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}
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func (l *serialListener) Accept() (conn net.Conn, err error) {
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select {
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case conn := <-l.cqueue:
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return conn, nil
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case <-l.closed:
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}
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return nil, listener.ErrClosed
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}
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func (l *serialListener) Addr() net.Addr {
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return l.addr
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}
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func (l *serialListener) Close() error {
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select {
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case <-l.closed:
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return net.ErrClosed
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default:
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close(l.closed)
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}
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return nil
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}
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func (l *serialListener) listenLoop() {
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for {
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ctx, cancel := context.WithCancel(context.Background())
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err := func() error {
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cfg := serial.ParseConfigFromAddr(l.options.Addr)
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cfg.ReadTimeout = l.md.timeout
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port, err := serial.OpenPort(cfg)
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if err != nil {
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return err
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}
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c := serial.NewConn(port, l.addr, cancel)
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c = metrics.WrapConn(l.options.Service, c)
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c = stats.WrapConn(c, l.options.Stats)
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c = limiter.WrapConn(l.options.TrafficLimiter, c)
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l.cqueue <- c
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return nil
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}()
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if err != nil {
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l.logger.Error(err)
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cancel()
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}
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select {
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case <-ctx.Done():
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case <-l.closed:
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return
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}
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time.Sleep(time.Second)
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}
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}
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