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Location: cpp/openttd-patchpack/source/src/network/network_gamelist.cpp
r7377:722cd70012ed
3.0 KiB
text/x-c
(svn r10746) -Codechange: add a generic superclass for almost all pool items so we do not have to duplicate code for each of the pool item classes and use it for the station and roadstop classes.
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/**
* @file network_gamelist.cpp This file handles the GameList
* Also, it handles the request to a server for data about the server
*/
#ifdef ENABLE_NETWORK
#include "../stdafx.h"
#include "../debug.h"
#include "../newgrf_config.h"
#include "../helpers.hpp"
#include "core/game.h"
#include "network_udp.h"
#include "network_gamelist.h"
#include "network_gui.h"
NetworkGameList *_network_game_list = NULL;
/** Add a new item to the linked gamelist. If the IP and Port match
* return the existing item instead of adding it again
* @param ip the IP-address (inet_addr) of the to-be added item
* @param port the port the server is running on
* @return a point to the newly added or already existing item */
NetworkGameList *NetworkGameListAddItem(uint32 ip, uint16 port)
{
NetworkGameList *item, *prev_item;
prev_item = NULL;
for (item = _network_game_list; item != NULL; item = item->next) {
if (item->ip == ip && item->port == port) return item;
prev_item = item;
}
item = MallocT<NetworkGameList>(1);
memset(item, 0, sizeof(*item));
item->next = NULL;
item->ip = ip;
item->port = port;
if (prev_item == NULL) {
_network_game_list = item;
} else {
prev_item->next = item;
}
DEBUG(net, 4, "[gamelist] added server to list");
UpdateNetworkGameWindow(false);
return item;
}
/** Remove an item from the gamelist linked list
* @param remove pointer to the item to be removed */
void NetworkGameListRemoveItem(NetworkGameList *remove)
{
NetworkGameList *item, *prev_item;
prev_item = NULL;
for (item = _network_game_list; item != NULL; item = item->next) {
if (remove == item) {
if (prev_item == NULL) {
_network_game_list = remove->next;
} else {
prev_item->next = remove->next;
}
/* Remove GRFConfig information */
ClearGRFConfigList(&remove->info.grfconfig);
free(remove);
remove = NULL;
DEBUG(net, 4, "[gamelist] removed server from list");
UpdateNetworkGameWindow(false);
return;
}
prev_item = item;
}
}
enum {
MAX_GAME_LIST_REQUERY_COUNT = 5, ///< How often do we requery in number of times per server?
REQUERY_EVERY_X_GAMELOOPS = 60, ///< How often do we requery in time?
REFRESH_GAMEINFO_X_REQUERIES = 50, ///< Refresh the game info itself after REFRESH_GAMEINFO_X_REQUERIES * REQUERY_EVERY_X_GAMELOOPS game loops
};
/** Requeries the (game) servers we have not gotten a reply from */
void NetworkGameListRequery()
{
static uint8 requery_cnt = 0;
if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
requery_cnt = 0;
struct in_addr ip;
NetworkGameList *item;
for (item = _network_game_list; item != NULL; item = item->next) {
item->retries++;
if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
ip.s_addr = item->ip;
/* item gets mostly zeroed by NetworkUDPQueryServer */
uint8 retries = item->retries;
NetworkUDPQueryServer(inet_ntoa(ip), item->port);
item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
}
}
#endif /* ENABLE_NETWORK */
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