From 3885ff8b31d99c82c44059c05b441cd31d0b23cb Mon Sep 17 00:00:00 2001
From: DHR60 <dehongren60@gmail.com>
Date: Mon, 8 Dec 2025 19:55:27 +0800
Subject: [PATCH] Fix Shadowsocks Fmt (#8462)

---
 .../ServiceLib/Handler/Fmt/ShadowsocksFmt.cs  | 23 +++++++++++++++----
 .../Singbox/SingboxOutboundService.cs         | 10 +++++---
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/v2rayN/ServiceLib/Handler/Fmt/ShadowsocksFmt.cs b/v2rayN/ServiceLib/Handler/Fmt/ShadowsocksFmt.cs
index f7941527..62f9e120 100644
--- a/v2rayN/ServiceLib/Handler/Fmt/ShadowsocksFmt.cs
+++ b/v2rayN/ServiceLib/Handler/Fmt/ShadowsocksFmt.cs
@@ -57,7 +57,10 @@ public class ShadowsocksFmt : BaseFmt
             {
                 pluginArgs += "mode=websocket;";
                 pluginArgs += $"host={item.RequestHost};";
-                pluginArgs += $"path={item.Path};";
+                // https://github.com/shadowsocks/v2ray-plugin/blob/e9af1cdd2549d528deb20a4ab8d61c5fbe51f306/args.go#L172
+                // Equal signs and commas [and backslashes] must be escaped with a backslash.
+                var path = item.Path.Replace("\\", "\\\\").Replace("=", "\\=").Replace(",", "\\,");
+                pluginArgs += $"path={path};";
             }
             else if (item.Network == nameof(ETransport.quic))
             {
@@ -75,8 +78,6 @@ public class ShadowsocksFmt : BaseFmt
 
                     var base64Content = cert.Replace(beginMarker, "").Replace(endMarker, "").Trim();
 
-                    // https://github.com/shadowsocks/v2ray-plugin/blob/e9af1cdd2549d528deb20a4ab8d61c5fbe51f306/args.go#L172
-                    // Equal signs and commas [and backslashes] must be escaped with a backslash.
                     base64Content = base64Content.Replace("=", "\\=");
 
                     pluginArgs += $"certRaw={base64Content};";
@@ -85,6 +86,7 @@ public class ShadowsocksFmt : BaseFmt
             if (pluginArgs.Length > 0)
             {
                 plugin = "v2ray-plugin";
+                pluginArgs += "mux=0;";
             }
         }
 
@@ -222,6 +224,7 @@ public class ShadowsocksFmt : BaseFmt
                 var path = pluginParts.FirstOrDefault(t => t.StartsWith("path="));
                 var hasTls = pluginParts.Any(t => t == "tls");
                 var certRaw = pluginParts.FirstOrDefault(t => t.StartsWith("certRaw="));
+                var mux = pluginParts.FirstOrDefault(t => t.StartsWith("mux="));
 
                 var modeValue = mode.Replace("mode=", "");
                 if (modeValue == "websocket")
@@ -234,7 +237,9 @@ public class ShadowsocksFmt : BaseFmt
                     }
                     if (!path.IsNullOrEmpty())
                     {
-                        item.Path = path.Replace("path=", "");
+                        var pathValue = path.Replace("path=", "");
+                        pathValue = pathValue.Replace("\\=", "=").Replace("\\,", ",").Replace("\\\\", "\\");
+                        item.Path = pathValue;
                     }
                 }
                 else if (modeValue == "quic")
@@ -258,6 +263,16 @@ public class ShadowsocksFmt : BaseFmt
                         item.Cert = certPem;
                     }
                 }
+
+                if (!mux.IsNullOrEmpty())
+                {
+                    var muxValue = mux.Replace("mux=", "");
+                    var muxCount = muxValue.ToInt();
+                    if (muxCount > 0)
+                    {
+                        return null;
+                    }
+                }
             }
         }
 
diff --git a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs
index f18f833c..79b10176 100644
--- a/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs
+++ b/v2rayN/ServiceLib/Services/CoreConfig/Singbox/SingboxOutboundService.cs
@@ -46,7 +46,10 @@ public partial class CoreConfigSingboxService
                             {
                                 pluginArgs += "mode=websocket;";
                                 pluginArgs += $"host={node.RequestHost};";
-                                pluginArgs += $"path={node.Path};";
+                                // https://github.com/shadowsocks/v2ray-plugin/blob/e9af1cdd2549d528deb20a4ab8d61c5fbe51f306/args.go#L172
+                                // Equal signs and commas [and backslashes] must be escaped with a backslash.
+                                var path = node.Path.Replace("\\", "\\\\").Replace("=", "\\=").Replace(",", "\\,");
+                                pluginArgs += $"path={path};";
                             }
                             else if (node.Network == nameof(ETransport.quic))
                             {
@@ -64,8 +67,6 @@ public partial class CoreConfigSingboxService
 
                                     var base64Content = cert.Replace(beginMarker, "").Replace(endMarker, "").Trim();
 
-                                    // https://github.com/shadowsocks/v2ray-plugin/blob/e9af1cdd2549d528deb20a4ab8d61c5fbe51f306/args.go#L172
-                                    // Equal signs and commas [and backslashes] must be escaped with a backslash.
                                     base64Content = base64Content.Replace("=", "\\=");
 
                                     pluginArgs += $"certRaw={base64Content};";
@@ -74,6 +75,9 @@ public partial class CoreConfigSingboxService
                             if (pluginArgs.Length > 0)
                             {
                                 outbound.plugin = "v2ray-plugin";
+                                pluginArgs += "mux=0;";
+                                // pluginStr remove last ';'
+                                pluginArgs = pluginArgs[..^1];
                                 outbound.plugin_opts = pluginArgs;
                             }
                         }