Method ReceiveCommand

src/network/network_command.cpp:374–388

* Receives a command from the network. * @param p the packet to read from. * @param cp the struct to write the data to. * @return An error message, or std::nullopt there has been no error. */

 * @return An error message, or std::nullopt there has been no error.
 */
std::optional<std::string_view> NetworkGameSocketHandler::ReceiveCommand(Packet &p, CommandPacket &cp)
{
	cp.company = (CompanyID)p.Recv_uint8();
	cp.cmd     = static_cast<Commands>(p.Recv_uint16());
	if (!IsValidCommand(cp.cmd)) return "invalid command";
	if (GetCommandFlags(cp.cmd).Test(CommandFlag::Offline)) return "single-player only command";
	cp.err_msg = p.Recv_uint16();
	cp.data    = _cmd_dispatch[cp.cmd].Sanitize(p.Recv_buffer());

	uint8_t callback = p.Recv_uint8();
	if (callback >= _callback_table.size() || _cmd_dispatch[cp.cmd].Unpack[callback] == nullptr) return "invalid callback";

	cp.callback = _callback_table[callback];
	return std::nullopt;
}

/**
 * Sends a command over the network.