Change: no longer use UDP when entering the lobby of a server

The lobby of a server requested some parts via UDP and some via
TCP. This is strictly seen fine, but for future extensions it
is a lot easier if just one protocol is used.

src/network/network.cpp

@@ -598,7 +598,7 @@ public:
 	{
 		_networking = true;
 		new ClientNetworkGameSocketHandler(s);
-		MyClient::SendCompanyInformationQuery();
+		MyClient::SendInformationQuery();
 	}
 };
 

src/network/network_client.cpp

@@ -27,6 +27,7 @@
 #include "network.h"
 #include "network_base.h"
 #include "network_client.h"
+#include "network_gamelist.h"
 #include "../core/backup_type.hpp"
 #include "../thread.h"
 
@@ -341,15 +342,18 @@ static_assert(NETWORK_SERVER_ID_LENGTH == 16 * 2 + 1);
  *   DEF_CLIENT_SEND_COMMAND has no parameters
  ************/
 
-/** Query the server for company information. */
-NetworkRecvStatus ClientNetworkGameSocketHandler::SendCompanyInformationQuery()
+/**
+ * Query the server for server information.
+ */
+NetworkRecvStatus ClientNetworkGameSocketHandler::SendInformationQuery()
 {
 	my_client->status = STATUS_COMPANY_INFO;
 	_network_join_status = NETWORK_JOIN_STATUS_GETTING_COMPANY_INFO;
 	SetWindowDirty(WC_NETWORK_STATUS_WINDOW, WN_NETWORK_STATUS_WINDOW_JOIN);
 
-	Packet *p = new Packet(PACKET_CLIENT_COMPANY_INFO);
-	my_client->SendPacket(p);
+	my_client->SendPacket(new Packet(PACKET_CLIENT_GAME_INFO));
+	my_client->SendPacket(new Packet(PACKET_CLIENT_COMPANY_INFO));
+
 	return NETWORK_RECV_STATUS_OKAY;
 }
 
@@ -571,6 +575,28 @@ NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *
 	return NETWORK_RECV_STATUS_SERVER_BANNED;
 }
 
+NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_GAME_INFO(Packet *p)
+{
+	if (this->status != STATUS_COMPANY_INFO && this->status != STATUS_INACTIVE) return NETWORK_RECV_STATUS_MALFORMED_PACKET;
+
+	NetworkGameList *item = GetLobbyGameInfo();
+
+	/* Clear any existing GRFConfig chain. */
+	ClearGRFConfigList(&item->info.grfconfig);
+	/* Retrieve the NetworkGameInfo from the packet. */
+	DeserializeNetworkGameInfo(p, &item->info);
+	/* Check for compatability with the client. */
+	CheckGameCompatibility(item->info);
+	/* Ensure we consider the server online. */
+	item->online = true;
+
+	SetWindowDirty(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_LOBBY);
+
+	/* We will receive company info next, so keep connection open. */
+	if (this->status == STATUS_COMPANY_INFO) return NETWORK_RECV_STATUS_OKAY;
+	return NETWORK_RECV_STATUS_CLOSE_QUERY;
+}
+
 NetworkRecvStatus ClientNetworkGameSocketHandler::Receive_SERVER_COMPANY_INFO(Packet *p)
 {
 	if (this->status != STATUS_COMPANY_INFO) return NETWORK_RECV_STATUS_MALFORMED_PACKET;

src/network/network_client.h

@@ -43,6 +43,7 @@ protected:
 	NetworkRecvStatus Receive_SERVER_FULL(Packet *p) override;
 	NetworkRecvStatus Receive_SERVER_BANNED(Packet *p) override;
 	NetworkRecvStatus Receive_SERVER_ERROR(Packet *p) override;
+	NetworkRecvStatus Receive_SERVER_GAME_INFO(Packet *p) override;
 	NetworkRecvStatus Receive_SERVER_COMPANY_INFO(Packet *p) override;
 	NetworkRecvStatus Receive_SERVER_CLIENT_INFO(Packet *p) override;
 	NetworkRecvStatus Receive_SERVER_NEED_GAME_PASSWORD(Packet *p) override;
@@ -79,7 +80,7 @@ public:
 	NetworkRecvStatus CloseConnection(NetworkRecvStatus status) override;
 	void ClientError(NetworkRecvStatus res);
 
-	static NetworkRecvStatus SendCompanyInformationQuery();
+	static NetworkRecvStatus SendInformationQuery();
 
 	static NetworkRecvStatus SendJoin();
 	static NetworkRecvStatus SendCommand(const CommandPacket *cp);

src/network/network_gui.cpp

@@ -1482,10 +1482,10 @@ struct NetworkLobbyWindow : public Window {
 				break;
 
 			case WID_NL_REFRESH:  // Refresh
-				NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // company info
-				NetworkUDPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // general data
 				/* Clear the information so removed companies don't remain */
 				for (auto &company : this->company_info) company = {};
+
+				NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 				break;
 		}
 	}
@@ -1553,8 +1553,7 @@ static void ShowNetworkLobbyWindow(NetworkGameList *ngl)
 	DeleteWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_START);
 	DeleteWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_GAME);
 
-	NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // company info
-	NetworkUDPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port)); // general data
+	NetworkTCPQueryServer(NetworkAddress(_settings_client.network.last_host, _settings_client.network.last_port));
 
 	new NetworkLobbyWindow(&_network_lobby_window_desc, ngl);
 }
@@ -1570,6 +1569,16 @@ NetworkCompanyInfo *GetLobbyCompanyInfo(CompanyID company)
 	return (lobby != nullptr && company < MAX_COMPANIES) ? &lobby->company_info[company] : nullptr;
 }
 
+/**
+ * Get the game information for the lobby.
+ * @return the game info struct to write the (downloaded) data to.
+ */
+NetworkGameList *GetLobbyGameInfo()
+{
+	NetworkLobbyWindow *lobby = dynamic_cast<NetworkLobbyWindow *>(FindWindowById(WC_NETWORK_WINDOW, WN_NETWORK_WINDOW_LOBBY));
+	return lobby != nullptr ? lobby->server : nullptr;
+}
+
 /* The window below gives information about the connected clients
  * and also makes able to kick them (if server) and stuff like that. */
 

src/network/network_gui.h

@@ -15,6 +15,7 @@
 #include "../economy_type.h"
 #include "../window_type.h"
 #include "network_type.h"
+#include "network_gamelist.h"
 
 void ShowNetworkNeedPassword(NetworkPasswordType npt);
 void ShowNetworkChatQueryWindow(DestType type, int dest);
@@ -37,5 +38,6 @@ struct NetworkCompanyInfo : NetworkCompanyStats {
 };
 
 NetworkCompanyInfo *GetLobbyCompanyInfo(CompanyID company);
+NetworkGameList *GetLobbyGameInfo();
 
 #endif /* NETWORK_GUI_H */