# 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
    00025 NetworkGameList *_network_game_list = NULL;
    00026
    00028 static ThreadMutex *_network_game_list_mutex = ThreadMutex::New();
    00030 static NetworkGameList *_network_game_delayed_insertion_list = NULL;
    00031
    00037 void NetworkGameListAddItemDelayed(NetworkGameList *item)
    00038 {
    00039   _network_game_list_mutex->BeginCritical();
    00040   item->next = _network_game_delayed_insertion_list;
    00041   _network_game_delayed_insertion_list = item;
    00042   _network_game_list_mutex->EndCritical();
    00043 }
    00044
    00046 static void NetworkGameListHandleDelayedInsert()
    00047 {
    00048   _network_game_list_mutex->BeginCritical();
    00049   while (_network_game_delayed_insertion_list != NULL) {
    00050     NetworkGameList *ins_item = _network_game_delayed_insertion_list;
    00051     _network_game_delayed_insertion_list = ins_item->next;
    00052
    00053     NetworkGameList *item = NetworkGameListAddItem(ins_item->address);
    00054
    00055     if (item != NULL) {
    00056       if (StrEmpty(item->info.server_name)) {
    00057         ClearGRFConfigList(&item->info.grfconfig);
    00058         memset(&item->info, 0, sizeof(item->info));
    00059         strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
    00060         strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
    00061         item->online = false;
    00062       }
    00063       item->manually |= ins_item->manually;
    00064       if (item->manually) NetworkRebuildHostList();
    00065       UpdateNetworkGameWindow(false);
    00066     }
    00067     free(ins_item);
    00068   }
    00069   _network_game_list_mutex->EndCritical();
    00070 }
    00071
    00078 NetworkGameList *NetworkGameListAddItem(NetworkAddress address)
    00079 {
    00080   const char *hostname = address.GetHostname();
    00081
    00082   /* Do not query the 'any' address. */
    00083   if (StrEmpty(hostname) ||
    00084       strcmp(hostname, "0.0.0.0") == 0 ||
    00085       strcmp(hostname, "::") == 0) {
    00086     return NULL;
    00087   }
    00088
    00089   NetworkGameList *item, *prev_item;
    00090
    00091   prev_item = NULL;
    00092   for (item = _network_game_list; item != NULL; item = item->next) {
    00093     if (item->address == address) return item;
    00094     prev_item = item;
    00095   }
    00096
    00097   item = CallocT<NetworkGameList>(1);
    00098   item->next = NULL;
    00099   item->address = address;
    00100
    00101   if (prev_item == NULL) {
    00102     _network_game_list = item;
    00103   } else {
    00104     prev_item->next = item;
    00105   }
    00106   DEBUG(net, 4, "[gamelist] added server to list");
    00107
    00108   UpdateNetworkGameWindow(false);
    00109
    00110   return item;
    00111 }
    00112
    00117 void NetworkGameListRemoveItem(NetworkGameList *remove)
    00118 {
    00119   NetworkGameList *prev_item = NULL;
    00120   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
    00121     if (remove == item) {
    00122       if (prev_item == NULL) {
    00123         _network_game_list = remove->next;
    00124       } else {
    00125         prev_item->next = remove->next;
    00126       }
    00127
    00128       /* Remove GRFConfig information */
    00129       ClearGRFConfigList(&remove->info.grfconfig);
    00130       free(remove);
    00131       remove = NULL;
    00132
    00133       DEBUG(net, 4, "[gamelist] removed server from list");
    00134       NetworkRebuildHostList();
    00135       UpdateNetworkGameWindow(false);
    00136       return;
    00137     }
    00138     prev_item = item;
    00139   }
    00140 }
    00141
    00142 static const uint MAX_GAME_LIST_REQUERY_COUNT  = 10;
    00143 static const uint REQUERY_EVERY_X_GAMELOOPS    = 60;
    00144 static const uint REFRESH_GAMEINFO_X_REQUERIES = 50;
    00145
    00147 void NetworkGameListRequery()
    00148 {
    00149   NetworkGameListHandleDelayedInsert();
    00150
    00151   static uint8 requery_cnt = 0;
    00152
    00153   if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
    00154   requery_cnt = 0;
    00155
    00156   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
    00157     item->retries++;
    00158     if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
    00159
    00160     /* item gets mostly zeroed by NetworkUDPQueryServer */
    00161     uint8 retries = item->retries;
    00162     NetworkUDPQueryServer(NetworkAddress(item->address));
    00163     item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
    00164   }
    00165 }
    00166
    00171 void NetworkAfterNewGRFScan()
    00172 {
    00173   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
    00174     /* Reset compatability state */
    00175     item->info.compatible = item->info.version_compatible;
    00176
    00177     for (GRFConfig *c = item->info.grfconfig; c != NULL; c = c->next) {
    00178       assert(HasBit(c->flags, GCF_COPY));
    00179
    00180       const GRFConfig *f = FindGRFConfig(c->ident.grfid, FGCM_EXACT, c->ident.md5sum);
    00181       if (f == NULL) {
    00182         /* Don't know the GRF, so mark game incompatible and the (possibly)
    00183          * already resolved name for this GRF (another server has sent the
    00184          * name of the GRF already */
    00185         c->name->Release();
    00186         c->name = FindUnknownGRFName(c->ident.grfid, c->ident.md5sum, true);
    00187         c->name->AddRef();
    00188         c->status = GCS_NOT_FOUND;
    00189
    00190         /* If we miss a file, we're obviously incompatible */
    00191         item->info.compatible = false;
    00192       } else {
    00193         c->filename = f->filename;
    00194         c->name->Release();
    00195         c->name = f->name;
    00196         c->name->AddRef();
    00197         c->info->Release();
    00198         c->info = f->info;
    00199         c->info->AddRef();
    00200         c->status = GCS_UNKNOWN;
    00201       }
    00202     }
    00203   }
    00204
    00205   InvalidateWindowClassesData(WC_NETWORK_WINDOW);
    00206 }
    00207
    00208 #endif /* ENABLE_NETWORK */