Fix udp

common/singbridge/handler.go

@@ -39,7 +39,7 @@ func (d *Dispatcher) NewConnection(ctx context.Context, conn net.Conn, metadata
 }
 
 func (d *Dispatcher) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
-	packetConn := &PacketConn{bufio.NewBindPacketConn(conn.(net.PacketConn), metadata.Destination)}
+	packetConn := &PacketConn{bufio.NewBindPacketConn(conn.(net.PacketConn), metadata.Destination), ToDestination(metadata.Destination, net.Network_UDP)}
 	return d.upstream.DispatchLink(ctx, ToDestination(metadata.Destination, net.Network_UDP), &transport.Link{
 		Reader: packetConn,
 		Writer: packetConn,

common/singbridge/reader.go

@@ -70,13 +70,15 @@ func (c *Conn) WriteMultiBuffer(bufferList buf.MultiBuffer) error {
 
 type PacketConn struct {
 	net.Conn
+	destination net.Destination
 }
 
 func (c *PacketConn) ReadMultiBuffer() (buf.MultiBuffer, error) {
-	buffer, err := buf.ReadOneUDP(c.Conn)
+	buffer, err := buf.ReadBuffer(c.Conn)
 	if err != nil {
 		return nil, err
 	}
+	buffer.UDP = &c.destination
 	return buf.MultiBuffer{buffer}, nil
 }
 

go.mod

@@ -14,7 +14,7 @@ require (
 	github.com/quic-go/quic-go v0.34.0
 	github.com/refraction-networking/utls v1.3.2
 	github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207
-	github.com/sagernet/sing-mux v0.0.0-20230425054943-ec2a972d0809
+	github.com/sagernet/sing-mux v0.0.0-20230425101127-4e8851eb1a2c
 	github.com/sagernet/sing-shadowsocks v0.2.1
 	github.com/sagernet/wireguard-go v0.0.0-20221116151939-c99467f53f2c
 	github.com/seiflotfy/cuckoofilter v0.0.0-20220411075957-e3b120b3f5fb

go.sum

@@ -148,8 +148,8 @@ github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR
 github.com/sagernet/sing v0.1.8/go.mod h1:jt1w2u7lJQFFSGLiRrRIs5YWmx4kAPfWuOejuDW9qMk=
 github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207 h1:+dDVjW20IT+e8maKryaDeRY2+RFmTFdrQeIzqE2WOss=
 github.com/sagernet/sing v0.2.5-0.20230423085534-0902e6216207/go.mod h1:Ta8nHnDLAwqySzKhGoKk4ZIB+vJ3GTKj7UPrWYvM+4w=
-github.com/sagernet/sing-mux v0.0.0-20230425054943-ec2a972d0809 h1:OJsley0JzpFCkwrl4BU38YX+hhVUrcCasomJsv6g6CY=
-github.com/sagernet/sing-mux v0.0.0-20230425054943-ec2a972d0809/go.mod h1:pF+RnLvCAOhECrvauy6LYOpBakJ/vuaF1Wm4lPsWryI=
+github.com/sagernet/sing-mux v0.0.0-20230425101127-4e8851eb1a2c h1:56vRmAIFvQZi9V2kNBNM/tOinmLtR9hx1xAWeDbTZb4=
+github.com/sagernet/sing-mux v0.0.0-20230425101127-4e8851eb1a2c/go.mod h1:pF+RnLvCAOhECrvauy6LYOpBakJ/vuaF1Wm4lPsWryI=
 github.com/sagernet/sing-shadowsocks v0.2.1 h1:FvdLQOqpvxHBJUcUe4fvgiYP2XLLwH5i1DtXQviVEPw=
 github.com/sagernet/sing-shadowsocks v0.2.1/go.mod h1:T/OgurSjsAe+Ug3+6PprXjmgHFmJidjOvQcjXGTKb3I=
 github.com/sagernet/smux v0.0.0-20230312102458-337ec2a5af37 h1:HuE6xSwco/Xed8ajZ+coeYLmioq0Qp1/Z2zczFaV8as=