124 lines
2.6 KiB
Go
124 lines
2.6 KiB
Go
package unix
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import (
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"context"
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"errors"
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"io"
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"net"
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"time"
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"github.com/go-gost/core/chain"
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"github.com/go-gost/core/hop"
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"github.com/go-gost/core/handler"
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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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xnet "github.com/go-gost/x/internal/net"
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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.HandlerRegistry().Register("unix", NewHandler)
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}
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type unixHandler struct {
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hop hop.Hop
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router *chain.Router
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md metadata
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options handler.Options
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}
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func NewHandler(opts ...handler.Option) handler.Handler {
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options := handler.Options{}
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for _, opt := range opts {
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opt(&options)
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}
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return &unixHandler{
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options: options,
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}
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}
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func (h *unixHandler) Init(md md.Metadata) (err error) {
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if err = h.parseMetadata(md); err != nil {
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return
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}
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h.router = h.options.Router
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if h.router == nil {
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h.router = chain.NewRouter(chain.LoggerRouterOption(h.options.Logger))
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}
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return
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}
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// Forward implements handler.Forwarder.
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func (h *unixHandler) Forward(hop hop.Hop) {
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h.hop = hop
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}
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func (h *unixHandler) Handle(ctx context.Context, conn net.Conn, opts ...handler.HandleOption) error {
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defer conn.Close()
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log := h.options.Logger
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log = log.WithFields(map[string]any{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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})
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if h.hop != nil {
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target := h.hop.Select(ctx)
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if target == nil {
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err := errors.New("target not available")
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log.Error(err)
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return err
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}
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log = log.WithFields(map[string]any{
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"node": target.Name,
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"dst": target.Addr,
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})
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return h.forwardUnix(ctx, conn, target, log)
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}
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cc, err := h.router.Dial(ctx, "tcp", "@")
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if err != nil {
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log.Error(err)
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return err
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}
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defer cc.Close()
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t := time.Now()
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log.Infof("%s <-> %s", conn.LocalAddr(), "@")
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xnet.Transport(conn, cc)
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log.WithFields(map[string]any{
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"duration": time.Since(t),
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}).Infof("%s >-< %s", conn.LocalAddr(), "@")
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return nil
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}
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func (h *unixHandler) forwardUnix(ctx context.Context, conn net.Conn, target *chain.Node, log logger.Logger) (err error) {
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log.Debugf("%s >> %s", conn.LocalAddr(), target.Addr)
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var cc io.ReadWriteCloser
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if opts := h.router.Options(); opts != nil && opts.Chain != nil {
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cc, err = h.router.Dial(ctx, "unix", target.Addr)
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} else {
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cc, err = (&net.Dialer{}).DialContext(ctx, "unix", target.Addr)
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}
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if err != nil {
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log.Error(err)
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return err
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}
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defer cc.Close()
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t := time.Now()
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log.Infof("%s <-> %s", conn.LocalAddr(), target.Addr)
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xnet.Transport(conn, cc)
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log.WithFields(map[string]any{
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"duration": time.Since(t),
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}).Infof("%s >-< %s", conn.LocalAddr(), target.Addr)
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return nil
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}
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