在使用tun模式做透明代理时，如果流量很大，就会触发panicked

Thank you very much for the tun mode. It is very important for me to simplify the openwrt kernel on an old router, because the official firmware does not have tproxy, and even ipset has not been compiled into the system, which makes the UDP protocol unusable. However, the tun mode has saved my old router, and the proxy efficiency (i.e. speed) exceeds my original expectations.