network_gamelist.cpp

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00001 /* $Id$ */
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 "../window_func.h"
00020 #include "../thread/thread.h"
00021 #include "network_internal.h"
00022 #include "network_udp.h"
00023 #include "network_gamelist.h"
00024 #include "../newgrf_text.h"
00025 
00026 NetworkGameList *_network_game_list = NULL;
00027 
00029 static ThreadMutex *_network_game_list_mutex = ThreadMutex::New();
00031 static NetworkGameList *_network_game_delayed_insertion_list = NULL;
00032 
00038 void NetworkGameListAddItemDelayed(NetworkGameList *item)
00039 {
00040   _network_game_list_mutex->BeginCritical();
00041   item->next = _network_game_delayed_insertion_list;
00042   _network_game_delayed_insertion_list = item;
00043   _network_game_list_mutex->EndCritical();
00044 }
00045 
00047 static void NetworkGameListHandleDelayedInsert()
00048 {
00049   _network_game_list_mutex->BeginCritical();
00050   while (_network_game_delayed_insertion_list != NULL) {
00051     NetworkGameList *ins_item = _network_game_delayed_insertion_list;
00052     _network_game_delayed_insertion_list = ins_item->next;
00053 
00054     NetworkGameList *item = NetworkGameListAddItem(ins_item->address);
00055 
00056     if (item != NULL) {
00057       if (StrEmpty(item->info.server_name)) {
00058         ClearGRFConfigList(&item->info.grfconfig);
00059         memset(&item->info, 0, sizeof(item->info));
00060         strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
00061         strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
00062         item->online = false;
00063       }
00064       item->manually |= ins_item->manually;
00065       if (item->manually) NetworkRebuildHostList();
00066       UpdateNetworkGameWindow(false);
00067     }
00068     free(ins_item);
00069   }
00070   _network_game_list_mutex->EndCritical();
00071 }
00072 
00079 NetworkGameList *NetworkGameListAddItem(NetworkAddress address)
00080 {
00081   const char *hostname = address.GetHostname();
00082 
00083   /* Do not query the 'any' address. */
00084   if (StrEmpty(hostname) ||
00085       strcmp(hostname, "0.0.0.0") == 0 ||
00086       strcmp(hostname, "::") == 0) {
00087     return NULL;
00088   }
00089 
00090   NetworkGameList *item, *prev_item;
00091 
00092   prev_item = NULL;
00093   for (item = _network_game_list; item != NULL; item = item->next) {
00094     if (item->address == address) return item;
00095     prev_item = item;
00096   }
00097 
00098   item = CallocT<NetworkGameList>(1);
00099   item->next = NULL;
00100   item->address = address;
00101 
00102   if (prev_item == NULL) {
00103     _network_game_list = item;
00104   } else {
00105     prev_item->next = item;
00106   }
00107   DEBUG(net, 4, "[gamelist] added server to list");
00108 
00109   UpdateNetworkGameWindow(false);
00110 
00111   return item;
00112 }
00113 
00118 void NetworkGameListRemoveItem(NetworkGameList *remove)
00119 {
00120   NetworkGameList *prev_item = NULL;
00121   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00122     if (remove == item) {
00123       if (prev_item == NULL) {
00124         _network_game_list = remove->next;
00125       } else {
00126         prev_item->next = remove->next;
00127       }
00128 
00129       /* Remove GRFConfig information */
00130       ClearGRFConfigList(&remove->info.grfconfig);
00131       free(remove);
00132       remove = NULL;
00133 
00134       DEBUG(net, 4, "[gamelist] removed server from list");
00135       NetworkRebuildHostList();
00136       UpdateNetworkGameWindow(false);
00137       return;
00138     }
00139     prev_item = item;
00140   }
00141 }
00142 
00143 static const uint MAX_GAME_LIST_REQUERY_COUNT  = 10; 
00144 static const uint REQUERY_EVERY_X_GAMELOOPS    = 60; 
00145 static const uint REFRESH_GAMEINFO_X_REQUERIES = 50; 
00146 
00148 void NetworkGameListRequery()
00149 {
00150   NetworkGameListHandleDelayedInsert();
00151 
00152   static uint8 requery_cnt = 0;
00153 
00154   if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
00155   requery_cnt = 0;
00156 
00157   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00158     item->retries++;
00159     if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
00160 
00161     /* item gets mostly zeroed by NetworkUDPQueryServer */
00162     uint8 retries = item->retries;
00163     NetworkUDPQueryServer(NetworkAddress(item->address));
00164     item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
00165   }
00166 }
00167 
00172 void NetworkAfterNewGRFScan()
00173 {
00174   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00175     /* Reset compatability state */
00176     item->info.compatible = item->info.version_compatible;
00177 
00178     for (GRFConfig *c = item->info.grfconfig; c != NULL; c = c->next) {
00179       assert(HasBit(c->flags, GCF_COPY));
00180 
00181       const GRFConfig *f = FindGRFConfig(c->ident.grfid, FGCM_EXACT, c->ident.md5sum);
00182       if (f == NULL) {
00183         /* Don't know the GRF, so mark game incompatible and the (possibly)
00184          * already resolved name for this GRF (another server has sent the
00185          * name of the GRF already */
00186         c->name->Release();
00187         c->name = FindUnknownGRFName(c->ident.grfid, c->ident.md5sum, true);
00188         c->name->AddRef();
00189         c->status = GCS_NOT_FOUND;
00190 
00191         /* If we miss a file, we're obviously incompatible */
00192         item->info.compatible = false;
00193       } else {
00194         c->filename = f->filename;
00195         c->name->Release();
00196         c->name = f->name;
00197         c->name->AddRef();
00198         c->info->Release();
00199         c->info = f->info;
00200         c->info->AddRef();
00201         c->status = GCS_UNKNOWN;
00202       }
00203     }
00204   }
00205 
00206   InvalidateWindowClassesData(WC_NETWORK_WINDOW);
00207 }
00208 
00209 #endif /* ENABLE_NETWORK */

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