108 lines
1.9 KiB
Go
108 lines
1.9 KiB
Go
package tap
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import (
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"net"
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"github.com/go-gost/gost/v3/pkg/listener"
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"github.com/go-gost/gost/v3/pkg/logger"
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mdata "github.com/go-gost/gost/v3/pkg/metadata"
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"github.com/go-gost/gost/v3/pkg/registry"
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metrics "github.com/go-gost/metrics/wrapper"
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)
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func init() {
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registry.ListenerRegistry().Register("tap", NewListener)
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}
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type tapListener struct {
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saddr string
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addr net.Addr
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cqueue chan net.Conn
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closed chan struct{}
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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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return &tapListener{
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saddr: options.Addr,
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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 *tapListener) Init(md mdata.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, err = net.ResolveUDPAddr("udp", l.saddr)
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if err != nil {
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return
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}
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ifce, ip, err := l.createTap()
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if err != nil {
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if ifce != nil {
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ifce.Close()
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}
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return
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}
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itf, err := net.InterfaceByName(ifce.Name())
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if err != nil {
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return
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}
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addrs, _ := itf.Addrs()
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l.logger.Infof("name: %s, mac: %s, mtu: %d, addrs: %s",
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itf.Name, itf.HardwareAddr, itf.MTU, addrs)
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l.cqueue = make(chan net.Conn, 1)
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l.closed = make(chan struct{})
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var c net.Conn
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c = &conn{
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ifce: ifce,
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laddr: l.addr,
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raddr: &net.IPAddr{IP: ip},
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}
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c = metrics.WrapConn(l.options.Service, c)
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c = withMetadata(mdata.MapMetadata{
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"config": l.md.config,
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}, c)
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l.cqueue <- c
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return
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}
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func (l *tapListener) Accept() (net.Conn, 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 *tapListener) Addr() net.Addr {
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return l.addr
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}
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func (l *tapListener) 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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