Method UpdateDebugDummies

src/engine/server/server.cpp:3001–3058

}

void CServer::UpdateDebugDummies(bool ForceDisconnect)
{
	if(m_PreviousDebugDummies == g_Config.m_DbgDummies && !ForceDisconnect)
		return;

	g_Config.m_DbgDummies = std::clamp(g_Config.m_DbgDummies, 0, MaxClients());
	for(int DummyIndex = 0; DummyIndex < maximum(m_PreviousDebugDummies, g_Config.m_DbgDummies); ++DummyIndex)
	{
		const bool AddDummy = !ForceDisconnect && DummyIndex < g_Config.m_DbgDummies;
		const int ClientId = MaxClients() - DummyIndex - 1;
		CClient &Client = m_aClients[ClientId];
		if(AddDummy && m_aClients[ClientId].m_State == CClient::STATE_EMPTY)
		{
			NewClientCallback(ClientId, this, false);
			Client.m_DebugDummy = true;

			// See https://en.wikipedia.org/wiki/Unique_local_address
			Client.m_DebugDummyAddr.type = NETTYPE_IPV6;
			Client.m_DebugDummyAddr.ip[0] = 0xfd;
			// Global ID (40 bits): random
			secure_random_fill(&Client.m_DebugDummyAddr.ip[1], 5);
			// Subnet ID (16 bits): constant
			Client.m_DebugDummyAddr.ip[6] = 0xc0;
			Client.m_DebugDummyAddr.ip[7] = 0xde;
			// Interface ID (64 bits): set to client ID
			Client.m_DebugDummyAddr.ip[8] = 0x00;
			Client.m_DebugDummyAddr.ip[9] = 0x00;
			Client.m_DebugDummyAddr.ip[10] = 0x00;
			Client.m_DebugDummyAddr.ip[11] = 0x00;
			uint_to_bytes_be(&Client.m_DebugDummyAddr.ip[12], ClientId);
			// Port: random like normal clients
			Client.m_DebugDummyAddr.port = secure_rand_below(65535 - 1024) + 1024;
			net_addr_str(&Client.m_DebugDummyAddr, Client.m_aDebugDummyAddrString.data(), Client.m_aDebugDummyAddrString.size(), true);
			net_addr_str(&Client.m_DebugDummyAddr, Client.m_aDebugDummyAddrStringNoPort.data(), Client.m_aDebugDummyAddrStringNoPort.size(), false);

			GameServer()->OnClientConnected(ClientId, nullptr);
			Client.m_State = CClient::STATE_INGAME;
			str_format(Client.m_aName, sizeof(Client.m_aName), "Debug dummy %d", DummyIndex + 1);
			GameServer()->OnClientEnter(ClientId);
		}
		else if(!AddDummy && Client.m_DebugDummy)
		{
			DelClientCallback(ClientId, "Dropping debug dummy", this);
		}

		if(AddDummy && Client.m_DebugDummy)
		{
			CNetObj_PlayerInput Input = {0};
			Input.m_Direction = (ClientId & 1) ? -1 : 1;
			Client.m_aInputs[0].m_GameTick = Tick() + 1;
			mem_copy(Client.m_aInputs[0].m_aData, &Input, minimum(sizeof(Input), sizeof(Client.m_aInputs[0].m_aData)));
			Client.m_LatestInput = Client.m_aInputs[0];
			Client.m_CurrentInput = 0;
		}
	}

	m_PreviousDebugDummies = ForceDisconnect ? 0 : g_Config.m_DbgDummies;
}