# network_gamelist.cpp

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    00001 /* $Id: network_gamelist.cpp 17565 2009-09-18 07:09:11Z rubidium $ */
    00002
    00008 #ifdef ENABLE_NETWORK
    00009
    00010 #include "../stdafx.h"
    00011 #include "../debug.h"
    00012 #include "../core/alloc_func.hpp"
    00013 #include "../thread.h"
    00014 #include "../string_func.h"
    00015 #include "network_internal.h"
    00016 #include "network_udp.h"
    00017 #include "network_gamelist.h"
    00018
    00019 NetworkGameList *_network_game_list = NULL;
    00020
    00021 ThreadMutex *_network_game_list_mutex = ThreadMutex::New();
    00022 NetworkGameList *_network_game_delayed_insertion_list = NULL;
    00023
    00028 void NetworkGameListAddItemDelayed(NetworkGameList *item)
    00029 {
    00030   _network_game_list_mutex->BeginCritical();
    00031   item->next = _network_game_delayed_insertion_list;
    00032   _network_game_delayed_insertion_list = item;
    00033   _network_game_list_mutex->EndCritical();
    00034 }
    00035
    00037 static void NetworkGameListHandleDelayedInsert()
    00038 {
    00039   _network_game_list_mutex->BeginCritical();
    00040   while (_network_game_delayed_insertion_list != NULL) {
    00041     NetworkGameList *ins_item = _network_game_delayed_insertion_list;
    00042     _network_game_delayed_insertion_list = ins_item->next;
    00043
    00044     NetworkGameList *item = NetworkGameListAddItem(ins_item->ip, ins_item->port);
    00045
    00046     if (item != NULL) {
    00047       ClearGRFConfigList(&item->info.grfconfig);
    00048       if (StrEmpty(item->info.server_name)) {
    00049         memset(&item->info, 0, sizeof(item->info));
    00050         strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
    00051         strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
    00052         item->online = false;
    00053       }
    00054       item->manually |= ins_item->manually;
    00055       if (item->manually) NetworkRebuildHostList();
    00056       UpdateNetworkGameWindow(false);
    00057     }
    00058     free(ins_item);
    00059   }
    00060   _network_game_list_mutex->EndCritical();
    00061 }
    00062
    00068 NetworkGameList *NetworkGameListAddItem(uint32 ip, uint16 port)
    00069 {
    00070   if (ip == 0) return NULL;
    00071
    00072   NetworkGameList *item, *prev_item;
    00073
    00074   prev_item = NULL;
    00075   for (item = _network_game_list; item != NULL; item = item->next) {
    00076     if (item->ip == ip && item->port == port) return item;
    00077     prev_item = item;
    00078   }
    00079
    00080   item = CallocT<NetworkGameList>(1);
    00081   item->next = NULL;
    00082   item->ip = ip;
    00083   item->port = port;
    00084
    00085   if (prev_item == NULL) {
    00086     _network_game_list = item;
    00087   } else {
    00088     prev_item->next = item;
    00089   }
    00090   DEBUG(net, 4, "[gamelist] added server to list");
    00091
    00092   UpdateNetworkGameWindow(false);
    00093
    00094   return item;
    00095 }
    00096
    00099 void NetworkGameListRemoveItem(NetworkGameList *remove)
    00100 {
    00101   NetworkGameList *item, *prev_item;
    00102
    00103   prev_item = NULL;
    00104   for (item = _network_game_list; item != NULL; item = item->next) {
    00105     if (remove == item) {
    00106       if (prev_item == NULL) {
    00107         _network_game_list = remove->next;
    00108       } else {
    00109         prev_item->next = remove->next;
    00110       }
    00111
    00112       /* Remove GRFConfig information */
    00113       ClearGRFConfigList(&remove->info.grfconfig);
    00114       free(remove);
    00115       remove = NULL;
    00116
    00117       DEBUG(net, 4, "[gamelist] removed server from list");
    00118       NetworkRebuildHostList();
    00119       UpdateNetworkGameWindow(false);
    00120       return;
    00121     }
    00122     prev_item = item;
    00123   }
    00124 }
    00125
    00126 enum {
    00127   MAX_GAME_LIST_REQUERY_COUNT  =  5,
    00128   REQUERY_EVERY_X_GAMELOOPS    = 60,
    00129   REFRESH_GAMEINFO_X_REQUERIES = 50,
    00130 };
    00131
    00133 void NetworkGameListRequery()
    00134 {
    00135   NetworkGameListHandleDelayedInsert();
    00136
    00137   static uint8 requery_cnt = 0;
    00138
    00139   if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
    00140   requery_cnt = 0;
    00141
    00142   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
    00143     item->retries++;
    00144     if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
    00145
    00146     /* item gets mostly zeroed by NetworkUDPQueryServer */
    00147     uint8 retries = item->retries;
    00148     NetworkUDPQueryServer(NetworkAddress(item->ip, item->port));
    00149     item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
    00150   }
    00151 }
    00152
    00157 void NetworkAfterNewGRFScan()
    00158 {
    00159   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
    00160     /* Reset compatability state */
    00161     item->info.compatible = item->info.version_compatible;
    00162
    00163     for (GRFConfig *c = item->info.grfconfig; c != NULL; c = c->next) {
    00164       assert(HasBit(c->flags, GCF_COPY));
    00165
    00166       const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
    00167       if (f == NULL) {
    00168         /* Don't know the GRF, so mark game incompatible and the (possibly)
    00169          * already resolved name for this GRF (another server has sent the
    00170          * name of the GRF already */
    00171         c->name   = FindUnknownGRFName(c->grfid, c->md5sum, true);
    00172         c->status = GCS_NOT_FOUND;
    00173
    00174         /* If we miss a file, we're obviously incompatible */
    00175         item->info.compatible = false;
    00176       } else {
    00177         c->filename  = f->filename;
    00178         c->name      = f->name;
    00179         c->info      = f->info;
    00180         c->status    = GCS_UNKNOWN;
    00181       }
    00182     }
    00183   }
    00184 }
    00185
    00186 #endif /* ENABLE_NETWORK */