Improve darwin tun performance

stack_system_unix.go

@@ -0,0 +1,26 @@
+//go:build !windows
+
+package tun
+
+import (
+	"net"
+
+	"github.com/sagernet/sing/common/control"
+
+	"golang.org/x/sys/unix"
+)
+
+func acceptConn(conn net.Conn) error {
+	return control.Conn(conn.(*net.TCPConn), func(fd uintptr) error {
+		const bufferSize = 1024 * 1024
+		oErr := unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_RCVBUF, bufferSize)
+		if oErr != nil {
+			return oErr
+		}
+		oErr = unix.SetsockoptInt(int(fd), unix.SOL_SOCKET, unix.SO_SNDBUF, bufferSize)
+		if oErr != nil {
+			return oErr
+		}
+		return nil
+	})
+}