static jboolean netty_epoll_native_isSupportingTcpFastopen(JNIEnv* env, jclass clazz) {
    int fastopen = 0;
    getSysctlValue("/proc/sys/net/ipv4/tcp_fastopen", &fastopen);
    if (fastopen > 0) {
        return JNI_TRUE;
    }
    return JNI_FALSE;
}
JNIEXPORT jboolean JNICALL Java_io_netty_channel_epoll_Native_isSupportingTcpFastopen(JNIEnv* env, jclass clazz) {
    int fastopen = 0;
    getSysctlValue("/proc/sys/net/ipv4/tcp_fastopen", &fastopen);
    if (fastopen > 0) {
        return JNI_TRUE;
    }
    return JNI_FALSE;
}