108 lines
2.3 KiB
Go
108 lines
2.3 KiB
Go
package redirect
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import (
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"context"
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"fmt"
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"net"
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"time"
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"github.com/go-gost/gost/pkg/bypass"
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"github.com/go-gost/gost/pkg/chain"
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"github.com/go-gost/gost/pkg/handler"
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"github.com/go-gost/gost/pkg/logger"
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md "github.com/go-gost/gost/pkg/metadata"
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"github.com/go-gost/gost/pkg/registry"
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)
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func init() {
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registry.RegisterHandler("red", NewHandler)
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registry.RegisterHandler("redu", NewHandler)
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registry.RegisterHandler("redir", NewHandler)
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registry.RegisterHandler("redirect", NewHandler)
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}
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type redirectHandler struct {
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bypass bypass.Bypass
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router *chain.Router
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logger logger.Logger
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md metadata
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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 &redirectHandler{
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bypass: options.Bypass,
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router: options.Router,
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logger: options.Logger,
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}
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}
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func (h *redirectHandler) Init(md md.Metadata) (err error) {
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return h.parseMetadata(md)
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}
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func (h *redirectHandler) Handle(ctx context.Context, conn net.Conn) {
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defer conn.Close()
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start := time.Now()
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h.logger = h.logger.WithFields(map[string]interface{}{
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"remote": conn.RemoteAddr().String(),
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"local": conn.LocalAddr().String(),
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})
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h.logger.Infof("%s <> %s", conn.RemoteAddr(), conn.LocalAddr())
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defer func() {
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h.logger.WithFields(map[string]interface{}{
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"duration": time.Since(start),
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}).Infof("%s >< %s", conn.RemoteAddr(), conn.LocalAddr())
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}()
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network := "tcp"
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var dstAddr net.Addr
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var err error
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if _, ok := conn.(net.PacketConn); ok {
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network = "udp"
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dstAddr = conn.LocalAddr()
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}
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if network == "tcp" {
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dstAddr, conn, err = h.getOriginalDstAddr(conn)
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if err != nil {
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h.logger.Error(err)
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return
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}
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}
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h.logger = h.logger.WithFields(map[string]interface{}{
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"dst": fmt.Sprintf("%s/%s", dstAddr, network),
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})
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h.logger.Infof("%s >> %s", conn.RemoteAddr(), dstAddr)
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if h.bypass != nil && h.bypass.Contains(dstAddr.String()) {
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h.logger.Info("bypass: ", dstAddr)
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return
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}
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cc, err := h.router.Dial(ctx, network, dstAddr.String())
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if err != nil {
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h.logger.Error(err)
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return
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}
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defer cc.Close()
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t := time.Now()
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h.logger.Infof("%s <-> %s", conn.RemoteAddr(), dstAddr)
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handler.Transport(conn, cc)
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h.logger.
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WithFields(map[string]interface{}{
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"duration": time.Since(t),
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}).
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Infof("%s >-< %s", conn.RemoteAddr(), dstAddr)
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}
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