@Silvers, you can add new native which allow to check reachbility
PHP Code:
"SurvivorBot::IsReachable"
{
"linux" "@_ZNK11SurvivorBot11IsReachableERK6Vector"
"windows" "\x55\x8B\xEC\xD9\x05\x2A\x2A\x2A\x2A\x8B\x45\x08"
}
As i remember it crashes on linux but you can find another function which do the same