add sniffing.fallback option for red handler

go.sum

@@ -53,18 +53,12 @@ github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE
 github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
 github.com/gin-gonic/gin v1.9.1 h1:4idEAncQnU5cB7BeOkPtxjfCSye0AAm1R0RVIqJ+Jmg=
 github.com/gin-gonic/gin v1.9.1/go.mod h1:hPrL7YrpYKXt5YId3A/Tnip5kqbEAP+KLuI3SUcPTeU=
-github.com/go-gost/core v0.1.1 h1:8joR9KJYBvpurNu3i0zqN9orQthVzOjhtT4STumwNF0=
-github.com/go-gost/core v0.1.1/go.mod h1:WGI43jOka7FAsSAwi/fSMaqxdR+E339ycb4NBGlFr6A=
 github.com/go-gost/core v0.1.2 h1:uWGLXEcfqkLYwvpGutXN2eIGXLOUGQX7L1QTe3NUDeA=
 github.com/go-gost/core v0.1.2/go.mod h1:WGI43jOka7FAsSAwi/fSMaqxdR+E339ycb4NBGlFr6A=
 github.com/go-gost/gosocks4 v0.0.1 h1:+k1sec8HlELuQV7rWftIkmy8UijzUt2I6t+iMPlGB2s=
 github.com/go-gost/gosocks4 v0.0.1/go.mod h1:3B6L47HbU/qugDg4JnoFPHgJXE43Inz8Bah1QaN9qCc=
 github.com/go-gost/gosocks5 v0.4.2 h1:IianxHTkACPqCwiOAT3MHoMdSUl+SEPSRu1ikawC1Pc=
 github.com/go-gost/gosocks5 v0.4.2/go.mod h1:1G6I7HP7VFVxveGkoK8mnprnJqSqJjdcASKsdUn4Pp4=
-github.com/go-gost/plugin v0.0.0-20240103125338-9c84e29cb81a h1:ME7P1Brcg4C640DSPqlvQr7JuvvQfJ8QpmS3yCFlK3A=
-github.com/go-gost/plugin v0.0.0-20240103125338-9c84e29cb81a/go.mod h1:qXr2Zm9Ex2ATqnWuNUzVZqySPMnuIihvblYZt4MlZLw=
-github.com/go-gost/plugin v0.1.0 h1:3C4pm+jyEy8EpGN2DzVUM4eS75T/GVxCq2fU4RuiFJs=
-github.com/go-gost/plugin v0.1.0/go.mod h1:oN23l+yGDCIP9G3KnDl/I/0zVGOobZUDCB2Z5yYYXts=
 github.com/go-gost/plugin v0.1.1 h1:LNoc/Rqwb3ceGhhxwhpjf1SeeYBGe80MJ9E4lpM3qak=
 github.com/go-gost/plugin v0.1.1/go.mod h1:oN23l+yGDCIP9G3KnDl/I/0zVGOobZUDCB2Z5yYYXts=
 github.com/go-gost/relay v0.5.0 h1:JG1tgy/KWiVXS0ukuVXvbM0kbYuJTWxYpJ5JwzsCf/c=

handler/redirect/tcp/handler.go

@@ -241,6 +241,10 @@ func (h *redirectHandler) handleHTTPS(ctx context.Context, rw io.ReadWriter, rad
 		cc, err = h.options.Router.Dial(ctx, "tcp", host)
 		if err != nil {
 			log.Error(err)
+
+			if !h.md.sniffingFallback {
+				return err
+			}
 		}
 	}
 

handler/redirect/tcp/metadata.go

@@ -11,11 +11,13 @@ type metadata struct {
 	tproxy          bool
 	sniffing        bool
 	sniffingTimeout time.Duration
+	sniffingFallback bool
 }
 
 func (h *redirectHandler) parseMetadata(md mdata.Metadata) (err error) {
 	h.md.tproxy = mdutil.GetBool(md, "tproxy")
 	h.md.sniffing = mdutil.GetBool(md, "sniffing")
 	h.md.sniffingTimeout = mdutil.GetDuration(md, "sniffing.timeout")
+	h.md.sniffingFallback = mdutil.GetBool(md, "sniffing.fallback")
 	return
 }