Fix concurrent write

transport/v2raygrpclite/conn.go

@@ -8,6 +8,7 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"sync"
 	"time"
 
 	"github.com/sagernet/sing-box/common/baderror"
@@ -28,6 +29,7 @@ type GunConn struct {
 	create        chan struct{}
 	err           error
 	readRemaining int
+	writeAccess   sync.Mutex
 }
 
 func newGunConn(reader io.Reader, writer io.Writer, flusher http.Flusher) *GunConn {
@@ -100,7 +102,9 @@ func (c *GunConn) Write(b []byte) (n int, err error) {
 	grpcHeader := buf.Get(5)
 	grpcPayloadLen := uint32(1 + varuintLen + len(b))
 	binary.BigEndian.PutUint32(grpcHeader[1:5], grpcPayloadLen)
+	c.writeAccess.Lock()
 	_, err = bufio.Copy(c.writer, io.MultiReader(bytes.NewReader(grpcHeader), bytes.NewReader(protobufHeader[:varuintLen+1]), bytes.NewReader(b)))
+	c.writeAccess.Unlock()
 	buf.Put(grpcHeader)
 	if c.flusher != nil {
 		c.flusher.Flush()

transport/v2raywebsocket/client.go

@@ -14,8 +14,7 @@ import (
 	E "github.com/sagernet/sing/common/exceptions"
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
-
-	"github.com/gorilla/websocket"
+	"github.com/sagernet/websocket"
 )
 
 var _ adapter.V2RayClientTransport = (*Client)(nil)

transport/v2raywebsocket/conn.go

@@ -11,8 +11,7 @@ import (
 
 	C "github.com/sagernet/sing-box/constant"
 	E "github.com/sagernet/sing/common/exceptions"
-
-	"github.com/gorilla/websocket"
+	"github.com/sagernet/websocket"
 )
 
 type WebsocketConn struct {

transport/v2raywebsocket/server.go

@@ -19,8 +19,7 @@ import (
 	M "github.com/sagernet/sing/common/metadata"
 	N "github.com/sagernet/sing/common/network"
 	sHttp "github.com/sagernet/sing/protocol/http"
-
-	"github.com/gorilla/websocket"
+	"github.com/sagernet/websocket"
 )
 
 var _ adapter.V2RayServerTransport = (*Server)(nil)