Add: ability to retrieve game info from server over TCP

src/network/core/tcp_game.cpp

@@ -71,6 +71,8 @@ NetworkRecvStatus NetworkGameSocketHandler::HandlePacket(Packet *p)
 		case PACKET_SERVER_BANNED:                return this->Receive_SERVER_BANNED(p);
 		case PACKET_CLIENT_JOIN:                  return this->Receive_CLIENT_JOIN(p);
 		case PACKET_SERVER_ERROR:                 return this->Receive_SERVER_ERROR(p);
+		case PACKET_CLIENT_GAME_INFO:             return this->Receive_CLIENT_GAME_INFO(p);
+		case PACKET_SERVER_GAME_INFO:             return this->Receive_SERVER_GAME_INFO(p);
 		case PACKET_CLIENT_COMPANY_INFO:          return this->Receive_CLIENT_COMPANY_INFO(p);
 		case PACKET_SERVER_COMPANY_INFO:          return this->Receive_SERVER_COMPANY_INFO(p);
 		case PACKET_SERVER_CLIENT_INFO:           return this->Receive_SERVER_CLIENT_INFO(p);
@@ -157,6 +159,8 @@ NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_FULL(Packet *p) { ret
 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_BANNED(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_BANNED); }
 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_JOIN(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_JOIN); }
 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_ERROR(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_ERROR); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_GAME_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_GAME_INFO); }
+NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_GAME_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_GAME_INFO); }
 NetworkRecvStatus NetworkGameSocketHandler::Receive_CLIENT_COMPANY_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_CLIENT_COMPANY_INFO); }
 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_COMPANY_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_COMPANY_INFO); }
 NetworkRecvStatus NetworkGameSocketHandler::Receive_SERVER_CLIENT_INFO(Packet *p) { return this->ReceiveInvalidPacket(PACKET_SERVER_CLIENT_INFO); }

src/network/core/tcp_game.h

@@ -24,7 +24,7 @@
  */
 enum PacketGameType {
 	/*
-	 * These first three pair of packets (thus six in
+	 * These first four pair of packets (thus eight in
 	 * total) must remain in this order for backward
 	 * and forward compatibility between clients that
 	 * are trying to join directly.
@@ -42,6 +42,10 @@ enum PacketGameType {
 	PACKET_CLIENT_COMPANY_INFO,          ///< Request information about all companies.
 	PACKET_SERVER_COMPANY_INFO,          ///< Information about a single company.
 
+	/* Packets used to get the game info. */
+	PACKET_CLIENT_GAME_INFO,             ///< Request information about the server.
+	PACKET_SERVER_GAME_INFO,             ///< Information about the server.
+
 	/*
 	 * Packets after here assume that the client
 	 * and server are running the same version. As
@@ -183,6 +187,19 @@ protected:
 	 */
 	virtual NetworkRecvStatus Receive_SERVER_ERROR(Packet *p);
 
+	/**
+	 * Request game information.
+	 * @param p The packet that was just received.
+	 */
+	virtual NetworkRecvStatus Receive_CLIENT_GAME_INFO(Packet *p);
+
+	/**
+	 * Sends information about the game.
+	 * Serialized NetworkGameInfo. See game_info.h for details.
+	 * @param p The packet that was just received.
+	 */
+	virtual NetworkRecvStatus Receive_SERVER_GAME_INFO(Packet *p);
+
 	/**
 	 * Request company information (in detail).
 	 * @param p The packet that was just received.

src/network/network_server.cpp

@@ -353,6 +353,20 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendClientInfo(NetworkClientIn
 	return NETWORK_RECV_STATUS_OKAY;
 }
 
+/** Send the client information about the server. */
+NetworkRecvStatus ServerNetworkGameSocketHandler::SendGameInfo()
+{
+	NetworkGameInfo ngi;
+	FillNetworkGameInfo(ngi);
+
+	Packet *p = new Packet(PACKET_SERVER_GAME_INFO);
+	SerializeNetworkGameInfo(p, &ngi);
+
+	this->SendPacket(p);
+
+	return NETWORK_RECV_STATUS_OKAY;
+}
+
 /** Send the client information about the companies. */
 NetworkRecvStatus ServerNetworkGameSocketHandler::SendCompanyInfo()
 {
@@ -828,6 +842,11 @@ NetworkRecvStatus ServerNetworkGameSocketHandler::SendConfigUpdate()
  *   DEF_SERVER_RECEIVE_COMMAND has parameter: NetworkClientSocket *cs, Packet *p
  ************/
 
+NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_GAME_INFO(Packet *p)
+{
+	return this->SendGameInfo();
+}
+
 NetworkRecvStatus ServerNetworkGameSocketHandler::Receive_CLIENT_COMPANY_INFO(Packet *p)
 {
 	return this->SendCompanyInfo();

src/network/network_server.h

@@ -24,6 +24,7 @@ extern NetworkClientSocketPool _networkclientsocket_pool;
 class ServerNetworkGameSocketHandler : public NetworkClientSocketPool::PoolItem<&_networkclientsocket_pool>, public NetworkGameSocketHandler, public TCPListenHandler<ServerNetworkGameSocketHandler, PACKET_SERVER_FULL, PACKET_SERVER_BANNED> {
 protected:
 	NetworkRecvStatus Receive_CLIENT_JOIN(Packet *p) override;
+	NetworkRecvStatus Receive_CLIENT_GAME_INFO(Packet *p) override;
 	NetworkRecvStatus Receive_CLIENT_COMPANY_INFO(Packet *p) override;
 	NetworkRecvStatus Receive_CLIENT_GAME_PASSWORD(Packet *p) override;
 	NetworkRecvStatus Receive_CLIENT_COMPANY_PASSWORD(Packet *p) override;
@@ -40,6 +41,7 @@ protected:
 	NetworkRecvStatus Receive_CLIENT_NEWGRFS_CHECKED(Packet *p) override;
 	NetworkRecvStatus Receive_CLIENT_MOVE(Packet *p) override;
 
+	NetworkRecvStatus SendGameInfo();
 	NetworkRecvStatus SendCompanyInfo();
 	NetworkRecvStatus SendNewGRFCheck();
 	NetworkRecvStatus SendWelcome();