package gost import "syscall" func setSocketMark(fd int, value int) (e error) { return syscall.SetsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_MARK, value) } func setSocketInterface(fd int, value string) (e error) { return syscall.SetsockoptString(fd, syscall.SOL_SOCKET, syscall.SO_BINDTODEVICE, value) }