unsigned int dtls1_link_min_mtu(void)
{
    return (g_probable_mtu[(sizeof(g_probable_mtu) /
                            sizeof(g_probable_mtu[0])) - 1]);
}
unsigned int dtls1_link_min_mtu(void)
{
    return (g_probable_mtu[(sizeof(g_probable_mtu) /
                            sizeof(g_probable_mtu[0])) - 1]);
}