extern NetworkServerGameInfo _network_game_info;

const char *GetNetworkRevisionString();

bool IsNetworkCompatibleVersion(const char *other);

void CheckGameCompatibility(NetworkGameInfo &ngi);

const NetworkServerGameInfo *GetCurrentNetworkServerGameInfo();

void DeserializeGRFIdentifier(Packet *p, GRFIdentifier *grf);

void SerializeGRFIdentifier(Packet *p, const GRFIdentifier *grf);

void DeserializeNetworkGameInfo(Packet *p, NetworkGameInfo *info);