network_gamelist.cpp

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00001 /* $Id: network_gamelist.cpp 18746 2010-01-06 20:49:24Z rubidium $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00015 #ifdef ENABLE_NETWORK
00016 
00017 #include "../stdafx.h"
00018 #include "../debug.h"
00019 #include "../thread/thread.h"
00020 #include "network_internal.h"
00021 #include "network_udp.h"
00022 #include "network_gamelist.h"
00023 
00024 NetworkGameList *_network_game_list = NULL;
00025 
00026 static ThreadMutex *_network_game_list_mutex = ThreadMutex::New();
00027 static NetworkGameList *_network_game_delayed_insertion_list = NULL;
00028 
00033 void NetworkGameListAddItemDelayed(NetworkGameList *item)
00034 {
00035   _network_game_list_mutex->BeginCritical();
00036   item->next = _network_game_delayed_insertion_list;
00037   _network_game_delayed_insertion_list = item;
00038   _network_game_list_mutex->EndCritical();
00039 }
00040 
00042 static void NetworkGameListHandleDelayedInsert()
00043 {
00044   _network_game_list_mutex->BeginCritical();
00045   while (_network_game_delayed_insertion_list != NULL) {
00046     NetworkGameList *ins_item = _network_game_delayed_insertion_list;
00047     _network_game_delayed_insertion_list = ins_item->next;
00048 
00049     NetworkGameList *item = NetworkGameListAddItem(ins_item->address);
00050 
00051     if (item != NULL) {
00052       if (StrEmpty(item->info.server_name)) {
00053         ClearGRFConfigList(&item->info.grfconfig);
00054         memset(&item->info, 0, sizeof(item->info));
00055         strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
00056         strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
00057         item->online = false;
00058       }
00059       item->manually |= ins_item->manually;
00060       if (item->manually) NetworkRebuildHostList();
00061       UpdateNetworkGameWindow(false);
00062     }
00063     free(ins_item);
00064   }
00065   _network_game_list_mutex->EndCritical();
00066 }
00067 
00073 NetworkGameList *NetworkGameListAddItem(NetworkAddress address)
00074 {
00075   const char *hostname = address.GetHostname();
00076 
00077   /* Do not query the 'any' address. */
00078   if (StrEmpty(hostname) ||
00079       strcmp(hostname, "0.0.0.0") == 0 ||
00080       strcmp(hostname, "::") == 0) {
00081     return NULL;
00082   }
00083 
00084   NetworkGameList *item, *prev_item;
00085 
00086   prev_item = NULL;
00087   for (item = _network_game_list; item != NULL; item = item->next) {
00088     if (item->address == address) return item;
00089     prev_item = item;
00090   }
00091 
00092   item = CallocT<NetworkGameList>(1);
00093   item->next = NULL;
00094   item->address = address;
00095 
00096   if (prev_item == NULL) {
00097     _network_game_list = item;
00098   } else {
00099     prev_item->next = item;
00100   }
00101   DEBUG(net, 4, "[gamelist] added server to list");
00102 
00103   UpdateNetworkGameWindow(false);
00104 
00105   return item;
00106 }
00107 
00110 void NetworkGameListRemoveItem(NetworkGameList *remove)
00111 {
00112   NetworkGameList *prev_item = NULL;
00113   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00114     if (remove == item) {
00115       if (prev_item == NULL) {
00116         _network_game_list = remove->next;
00117       } else {
00118         prev_item->next = remove->next;
00119       }
00120 
00121       /* Remove GRFConfig information */
00122       ClearGRFConfigList(&remove->info.grfconfig);
00123       free(remove);
00124       remove = NULL;
00125 
00126       DEBUG(net, 4, "[gamelist] removed server from list");
00127       NetworkRebuildHostList();
00128       UpdateNetworkGameWindow(false);
00129       return;
00130     }
00131     prev_item = item;
00132   }
00133 }
00134 
00135 enum {
00136   MAX_GAME_LIST_REQUERY_COUNT  = 10, 
00137   REQUERY_EVERY_X_GAMELOOPS    = 60, 
00138   REFRESH_GAMEINFO_X_REQUERIES = 50, 
00139 };
00140 
00142 void NetworkGameListRequery()
00143 {
00144   NetworkGameListHandleDelayedInsert();
00145 
00146   static uint8 requery_cnt = 0;
00147 
00148   if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
00149   requery_cnt = 0;
00150 
00151   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00152     item->retries++;
00153     if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
00154 
00155     /* item gets mostly zeroed by NetworkUDPQueryServer */
00156     uint8 retries = item->retries;
00157     NetworkUDPQueryServer(NetworkAddress(item->address));
00158     item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
00159   }
00160 }
00161 
00166 void NetworkAfterNewGRFScan()
00167 {
00168   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00169     /* Reset compatability state */
00170     item->info.compatible = item->info.version_compatible;
00171 
00172     for (GRFConfig *c = item->info.grfconfig; c != NULL; c = c->next) {
00173       assert(HasBit(c->flags, GCF_COPY));
00174 
00175       const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
00176       if (f == NULL) {
00177         /* Don't know the GRF, so mark game incompatible and the (possibly)
00178          * already resolved name for this GRF (another server has sent the
00179          * name of the GRF already */
00180         c->name   = FindUnknownGRFName(c->grfid, c->md5sum, true);
00181         c->status = GCS_NOT_FOUND;
00182 
00183         /* If we miss a file, we're obviously incompatible */
00184         item->info.compatible = false;
00185       } else {
00186         c->filename  = f->filename;
00187         c->name      = f->name;
00188         c->info      = f->info;
00189         c->status    = GCS_UNKNOWN;
00190       }
00191     }
00192   }
00193 }
00194 
00195 #endif /* ENABLE_NETWORK */

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