Add obfs-local and v2ray-plugin support for shadowsocks outbound

transport/sip003/obfs.go

@@ -0,0 +1,59 @@
+package sip003
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/transport/simple-obfs"
+	E "github.com/sagernet/sing/common/exceptions"
+	F "github.com/sagernet/sing/common/format"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+var _ Plugin = (*ObfsLocal)(nil)
+
+func init() {
+	RegisterPlugin("obfs-local", newObfsLocal)
+}
+
+func newObfsLocal(pluginOpts Args, router adapter.Router, dialer N.Dialer, serverAddr M.Socksaddr) (Plugin, error) {
+	var plugin ObfsLocal
+	mode := "http"
+	if obfsMode, loaded := pluginOpts.Get("obfs"); loaded {
+		mode = obfsMode
+	}
+	if obfsHost, loaded := pluginOpts.Get("obfs-host"); loaded {
+		plugin.host = obfsHost
+	}
+	switch mode {
+	case "http":
+	case "tls":
+		plugin.tls = true
+	default:
+		return nil, E.New("unknown obfs mode ", mode)
+	}
+	plugin.port = F.ToString(serverAddr.Port)
+	return &plugin, nil
+}
+
+type ObfsLocal struct {
+	dialer     N.Dialer
+	serverAddr M.Socksaddr
+	tls        bool
+	host       string
+	port       string
+}
+
+func (o *ObfsLocal) DialContext(ctx context.Context) (net.Conn, error) {
+	conn, err := o.dialer.DialContext(ctx, N.NetworkTCP, o.serverAddr)
+	if err != nil {
+		return nil, err
+	}
+	if !o.tls {
+		return obfs.NewHTTPObfs(conn, o.host, o.port), nil
+	} else {
+		return obfs.NewTLSObfs(conn, o.host), nil
+	}
+}