fix: in-port not work with shadowsocks listener

listener/sing/context.go

@@ -3,6 +3,7 @@ package sing
 import (
 	"context"
 	"golang.org/x/exp/slices"
+	"net"
 
 	"github.com/metacubex/mihomo/adapter/inbound"
 
@@ -29,3 +30,18 @@ func getAdditions(ctx context.Context) (additions []inbound.Addition) {
 	}
 	return
 }
+
+var ctxKeyInAddr = contextKey("InAddr")
+
+func WithInAddr(ctx context.Context, inAddr net.Addr) context.Context {
+	return context.WithValue(ctx, ctxKeyInAddr, inAddr)
+}
+
+func getInAddr(ctx context.Context) net.Addr {
+	if v := ctx.Value(ctxKeyInAddr); v != nil {
+		if a, ok := v.(net.Addr); ok {
+			return a
+		}
+	}
+	return nil
+}

listener/sing/sing.go

@@ -187,6 +187,9 @@ func (h *ListenerHandler) NewPacketConnection(ctx context.Context, conn network.
 			lAddr:  conn.LocalAddr(),
 			buff:   buff,
 		}
+		if lAddr := getInAddr(ctx); lAddr != nil {
+			cPacket.lAddr = lAddr
+		}
 		h.handlePacket(ctx, cPacket, metadata.Source, dest)
 	}
 	return nil

listener/sing_shadowsocks/server.go

@@ -156,11 +156,7 @@ func New(config LC.ShadowsocksServer, tunnel C.Tunnel, additions ...inbound.Addi
 
 			go func() {
 				conn := bufio.NewPacketConn(ul)
-				rwOptions := network.ReadWaitOptions{
-					FrontHeadroom: network.CalculateFrontHeadroom(sl.service),
-					RearHeadroom:  network.CalculateRearHeadroom(sl.service),
-					MTU:           network.CalculateMTU(conn, sl.service),
-				}
+				rwOptions := network.NewReadWaitOptions(conn, sl.service)
 				readWaiter, isReadWaiter := bufio.CreatePacketReadWaiter(conn)
 				if isReadWaiter {
 					readWaiter.InitializeReadWaiter(rwOptions)
@@ -188,7 +184,9 @@ func New(config LC.ShadowsocksServer, tunnel C.Tunnel, additions ...inbound.Addi
 						}
 						continue
 					}
-					_ = sl.service.NewPacket(context.TODO(), conn, buff, M.Metadata{
+					ctx := context.TODO()
+					ctx = sing.WithInAddr(ctx, ul.LocalAddr())
+					_ = sl.service.NewPacket(ctx, conn, buff, M.Metadata{
 						Protocol: "shadowsocks",
 						Source:   dest,
 					})