tron@2186: /* $Id$ */
tron@2186: 
celestar@6121: /**
celestar@6121:  * @file network_gamelist.cpp This file handles the GameList
celestar@6121:  * Also, it handles the request to a server for data about the server
celestar@6121:  */
celestar@6121: 
Darkvater@4826: #ifdef ENABLE_NETWORK
Darkvater@4826: 
rubidium@5469: #include "../stdafx.h"
rubidium@5469: #include "../debug.h"
rubidium@5469: #include "../newgrf_config.h"
rubidium@5587: #include "../helpers.hpp"
rubidium@5917: #include "core/game.h"
rubidium@5897: #include "network_udp.h"
rubidium@5917: #include "network_gamelist.h"
rubidium@5917: #include "network_gui.h"
rubidium@5917: 
rubidium@5917: NetworkGameList *_network_game_list = NULL;
rubidium@5897: 
Darkvater@2885: /** Add a new item to the linked gamelist. If the IP and Port match
Darkvater@2885:  * return the existing item instead of adding it again
Darkvater@2885:  * @param ip the IP-address (inet_addr) of the to-be added item
Darkvater@2885:  * @param port the port the server is running on
Darkvater@2885:  * @return a point to the newly added or already existing item */
truelight@543: NetworkGameList *NetworkGameListAddItem(uint32 ip, uint16 port)
truelight@543: {
Darkvater@2881: 	NetworkGameList *item, *prev_item;
truelight@543: 
Darkvater@2881: 	prev_item = NULL;
Darkvater@2881: 	for (item = _network_game_list; item != NULL; item = item->next) {
Darkvater@2881: 		if (item->ip == ip && item->port == port) return item;
Darkvater@2881: 		prev_item = item;
truelight@543: 	}
truelight@543: 
KUDr@5609: 	item = MallocT<NetworkGameList>(1);
truelight@543: 	memset(item, 0, sizeof(*item));
truelight@543: 	item->next = NULL;
truelight@543: 	item->ip = ip;
truelight@543: 	item->port = port;
Darkvater@2881: 
tron@4077: 	if (prev_item == NULL) {
tron@4077: 		_network_game_list = item;
tron@4077: 	} else {
tron@4077: 		prev_item->next = item;
tron@4077: 	}
Darkvater@5380: 	DEBUG(net, 4, "[gamelist] added server to list");
truelight@543: 
truelight@543: 	UpdateNetworkGameWindow(false);
truelight@543: 
truelight@543: 	return item;
truelight@543: }
truelight@543: 
Darkvater@2885: /** Remove an item from the gamelist linked list
Darkvater@2885:  * @param remove pointer to the item to be removed */
dominik@738: void NetworkGameListRemoveItem(NetworkGameList *remove)
dominik@738: {
Darkvater@2881: 	NetworkGameList *item, *prev_item;
dominik@738: 
Darkvater@2881: 	prev_item = NULL;
Darkvater@2881: 	for (item = _network_game_list; item != NULL; item = item->next) {
Darkvater@2881: 		if (remove == item) {
tron@4077: 			if (prev_item == NULL) {
tron@4077: 				_network_game_list = remove->next;
tron@4077: 			} else {
tron@4077: 				prev_item->next = remove->next;
tron@4077: 			}
dominik@738: 
rubidium@5339: 			/* Remove GRFConfig information */
Darkvater@5347: 			ClearGRFConfigList(&remove->info.grfconfig);
Darkvater@5347: 			free(remove);
Darkvater@5347: 			remove = NULL;
rubidium@5339: 
Darkvater@5380: 			DEBUG(net, 4, "[gamelist] removed server from list");
Darkvater@2881: 			UpdateNetworkGameWindow(false);
dominik@738: 			return;
dominik@738: 		}
Darkvater@2881: 		prev_item = item;
dominik@738: 	}
dominik@738: }
dominik@738: 
rubidium@5897: enum {
rubidium@7331: 	MAX_GAME_LIST_REQUERY_COUNT  =  5, ///< How often do we requery in number of times per server?
rubidium@7331: 	REQUERY_EVERY_X_GAMELOOPS    = 60, ///< How often do we requery in time?
rubidium@7331: 	REFRESH_GAMEINFO_X_REQUERIES = 50, ///< Refresh the game info itself after REFRESH_GAMEINFO_X_REQUERIES * REQUERY_EVERY_X_GAMELOOPS game loops
rubidium@5897: };
rubidium@5897: 
rubidium@5897: /** Requeries the (game) servers we have not gotten a reply from */
rubidium@6247: void NetworkGameListRequery()
rubidium@5897: {
rubidium@5897: 	static uint8 requery_cnt = 0;
rubidium@5897: 
rubidium@7331: 	if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
rubidium@5897: 	requery_cnt = 0;
rubidium@5897: 
rubidium@5897: 	struct in_addr ip;
rubidium@5897: 	NetworkGameList *item;
rubidium@5897: 
rubidium@5897: 	for (item = _network_game_list; item != NULL; item = item->next) {
rubidium@7331: 		item->retries++;
rubidium@7331: 		if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
rubidium@5897: 
rubidium@5897: 		ip.s_addr = item->ip;
rubidium@5897: 
rubidium@5897: 		/* item gets mostly zeroed by NetworkUDPQueryServer */
rubidium@5897: 		uint8 retries = item->retries;
rubidium@5897: 		NetworkUDPQueryServer(inet_ntoa(ip), item->port);
rubidium@7331: 		item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
rubidium@5897: 	}
rubidium@5897: }
rubidium@5897: 
truelight@543: #endif /* ENABLE_NETWORK */