src/ServerList.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 // Copyright (c) 2002-2008 Merkur ( devs@emule-project.net / http://www.emule-project.net )
   6 //
   7 // Any parts of this program derived from the xMule, lMule or eMule project,
   8 // or contributed by third-party developers are copyrighted by their
   9 // respective authors.
  10 //
  11 // This program is free software; you can redistribute it and/or modify
  12 // it under the terms of the GNU General Public License as published by
  13 // the Free Software Foundation; either version 2 of the License, or
  14 // (at your option) any later version.
  15 //
  16 // This program is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20 //
  21 // You should have received a copy of the GNU General Public License
  22 // along with this program; if not, write to the Free Software
  23 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  24 //
  25
  26 #include <wx/wx.h>
  27
  28 #include "ServerList.h"                 // Interface declarations.
  29
  30 #include <protocol/Protocols.h>
  31 #include <protocol/ed2k/Constants.h>
  32 #include <common/DataFileVersion.h>
  33 #include <tags/ServerTags.h>
  34
  35 #include <wx/txtstrm.h>
  36 #include <wx/wfstream.h>
  37 #include <wx/url.h>                     // Needed for wxURL
  38 #include <wx/tokenzr.h>
  39
  40 #include "DownloadQueue.h"              // Needed for CDownloadQueue
  41 #include "ServerConnect.h"              // Needed for CServerConnect
  42 #include "Server.h"                     // Needed for CServer and SRV_PR_*
  43 #include "OtherStructs.h"               // Needed for ServerMet_Struct
  44 #include "CFile.h"                      // Needed for CFile
  45 #include "HTTPDownload.h"               // Needed for HTTPThread
  46 #include "Preferences.h"                // Needed for thePrefs
  47 #include "amule.h"                      // Needed for theApp
  48 #include "Statistics.h"                 // Needed for theStats
  49 #include "Packet.h"                     // Neeed for CPacket
  50 #include "Logger.h"
  51 #include "ScopedPtr.h"
  52 #include <common/Format.h>
  53 #include "IPFilter.h"
  54 #include <common/FileFunctions.h>       // Needed for UnpackArchive
  55
  56 CServerList::CServerList()
  57 {
  58         m_serverpos = m_servers.end();
  59         m_statserverpos = m_servers.end();
  60         m_nLastED2KServerLinkCheck = ::GetTickCount();
  61 }
  62
  63
  64 bool CServerList::Init()
  65 {
  66         // Load Metfile
  67         bool bRes = LoadServerMet(CPath(theApp->ConfigDir + wxT("server.met")));
  68
  69         // insert static servers from textfile
  70         LoadStaticServers(theApp->ConfigDir + wxT("staticservers.dat"));
  71
  72         // Send the auto-update of server.met via HTTPThread requests
  73         current_url_index = 0;
  74         if ( thePrefs::AutoServerlist()) {
  75                 AutoUpdate();
  76         }
  77
  78         return bRes;
  79 }
  80
  81
  82 bool CServerList::LoadServerMet(const CPath& path)
  83 {
  84         AddLogLineM(false, CFormat(_("Loading server.met file: %s")) % path);
  85
  86         bool merge = !m_servers.empty();
  87
  88         if (!path.FileExists()) {
  89                 AddLogLineM(false, _("Server.met file not found!"));
  90                 return false;
  91         }
  92
  93         // Try to unpack the file, might be an archive
  94         const wxChar* mets[] = { wxT("server.met"), NULL };
  95         // Try to unpack the file, might be an archive
  96         if (UnpackArchive(path, mets).second != EFT_Met) {
  97                 AddLogLineM(true, CFormat(_("Failed to load server.met file '%s', unknown format encountered.")) % path);
  98                 return false;
  99         }
 100
 101         CFile servermet(path, CFile::read);
 102         if ( !servermet.IsOpened() ){
 103                 AddLogLineM( false, _("Failed to open server.met!") );
 104                 return false;
 105         }
 106
 107
 108         try {
 109                 Notify_ServerFreeze();
 110
 111                 byte version = servermet.ReadUInt8();
 112
 113                 if (version != 0xE0 && version != MET_HEADER) {
 114                         AddLogLineC(CFormat(_("Server.met file corrupt, found invalid versiontag: 0x%x, size %i")) % version % sizeof(version));
 115                         Notify_ServerThaw();
 116                         return false;
 117                 }
 118
 119                 uint32 fservercount = servermet.ReadUInt32();
 120
 121                 ServerMet_Struct sbuffer;
 122                 uint32 iAddCount = 0;
 123
 124                 for ( uint32 j = 0; j < fservercount; ++j ) {
 125                         sbuffer.ip              = servermet.ReadUInt32();
 126                         sbuffer.port            = servermet.ReadUInt16();
 127                         sbuffer.tagcount        = servermet.ReadUInt32();
 128
 129                         CServer* newserver = new CServer(&sbuffer);
 130
 131                         // Load tags
 132                         for ( uint32 i = 0; i < sbuffer.tagcount; ++i ) {
 133                                 newserver->AddTagFromFile(&servermet);
 134                         }
 135
 136                         // Server priorities are not in sorted order
 137                         // High = 1, Low = 2, Normal = 0, so we have to check
 138                         // in a less logical fashion.
 139                         int priority = newserver->GetPreferences();
 140                         if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 141                                 newserver->SetPreference(SRV_PR_NORMAL);
 142                         }
 143
 144                         // set listname for server
 145                         if ( newserver->GetListName().IsEmpty() ) {
 146                                 newserver->SetListName(wxT("Server ") +newserver->GetAddress());
 147                         }
 148
 149
 150                         if ( !theApp->AddServer(newserver) ) {
 151                                 CServer* update = GetServerByAddress(newserver->GetAddress(), newserver->GetPort());
 152                                 if(update) {
 153                                         update->SetListName( newserver->GetListName());
 154                                         if(!newserver->GetDescription().IsEmpty()) {
 155                                                 update->SetDescription( newserver->GetDescription());
 156                                         }
 157                                         Notify_ServerRefresh(update);
 158                                 }
 159                                 delete newserver;
 160                         } else {
 161                                 ++iAddCount;
 162                         }
 163
 164                 }
 165
 166                 Notify_ServerThaw();
 167
 168                 if (!merge) {
 169                         AddLogLineC(CFormat(wxPLURAL("%i server in server.met found", "%i servers in server.met found", fservercount)) % fservercount);
 170                 } else {
 171                         AddLogLineC(CFormat(wxPLURAL("%d server added", "%d servers added", iAddCount)) % iAddCount);
 172                 }
 173         } catch (const CInvalidPacket& err) {
 174                 AddLogLineM(true, wxT("Error: the file server.met is corrupted: ") + err.what());
 175                 Notify_ServerThaw();
 176                 return false;
 177         } catch (const CSafeIOException& err) {
 178                 AddLogLineM(true, wxT("IO error while reading 'server.met': ") + err.what());
 179                 Notify_ServerThaw();
 180                 return false;
 181         }
 182
 183         return true;
 184 }
 185
 186
 187 bool CServerList::AddServer(CServer* in_server, bool fromUser)
 188 {
 189         if ( !in_server->GetPort() ) {
 190                 if ( fromUser ) {
 191                         AddLogLineM( true,
 192                                 CFormat( _("Server not added: [%s:%d] does not specify a valid port.") )
 193                                         % in_server->GetAddress()
 194                                         % in_server->GetPort()
 195                         );
 196                 }
 197
 198                 return false;
 199         } else if (
 200                                 !in_server->HasDynIP() &&
 201                                 (
 202                                         !IsGoodIP( in_server->GetIP(), thePrefs::FilterLanIPs() ) ||
 203                                         (       // don't test for filtered while ipfilter is still loading,
 204                                                 // it will be filtered when filter loading is finished
 205                                                 theApp->ipfilter->IsReady()
 206                                                 && theApp->ipfilter->IsFiltered(in_server->GetIP(), true))
 207                                 )
 208                   ) {
 209                 if ( fromUser ) {
 210                         AddLogLineM( true,
 211                                 CFormat( _("Server not added: The IP of [%s:%d] is filtered or invalid.") )
 212                                         % in_server->GetAddress()
 213                                         % in_server->GetPort()
 214                         );
 215                 }
 216
 217                 return false;
 218         }
 219
 220         CServer* test_server = GetServerByAddress(in_server->GetAddress(), in_server->GetPort());
 221         // Avoid duplicate (dynIP) servers: If the server which is to be added, is a dynIP-server
 222         // but we don't know yet it's DN, we need to search for an already available server with
 223         // that IP.
 224         if (test_server == NULL && in_server->GetIP() != 0) {
 225                 test_server = GetServerByIPTCP(in_server->GetIP(), in_server->GetPort());
 226         }
 227
 228         if (test_server) {
 229                 if ( fromUser ) {
 230                         AddLogLineM( true,
 231                                 CFormat( _("Server not added: Server with matching IP:Port [%s:%d] found in list.") )
 232                                         % in_server->GetAddress()
 233                                         % in_server->GetPort()
 234                         );
 235                 }
 236
 237                 test_server->ResetFailedCount();
 238                 Notify_ServerRefresh( test_server );
 239
 240                 return false;
 241         }
 242
 243         theStats::AddServer();
 244
 245         m_servers.push_back(in_server);
 246         NotifyObservers( EventType( EventType::INSERTED, in_server ) );
 247
 248         if ( fromUser ) {
 249                 AddLogLineM( true,
 250                         CFormat( _("Server added: Server at [%s:%d] using the name '%s'.") )
 251                                 % in_server->GetAddress()
 252                                 % in_server->GetPort()
 253                                 % in_server->GetListName()
 254                 );
 255         }
 256
 257
 258         return true;
 259 }
 260
 261
 262 void CServerList::ServerStats()
 263 {
 264         uint32 tNow = ::GetTickCount();
 265
 266         if (theApp->IsConnectedED2K() && m_servers.size() > 0) {
 267                 CServer* ping_server = GetNextStatServer();
 268                 CServer* test = ping_server;
 269                 if (!ping_server) {
 270                         return;
 271                 }
 272
 273                 while (ping_server->GetLastPingedTime() && (tNow - ping_server->GetLastPingedTime()) < UDPSERVSTATREASKTIME) {
 274                         ping_server = GetNextStatServer();
 275                         if (ping_server == test) {
 276                                 return;
 277                         }
 278                 }
 279
 280                 if (ping_server->GetFailedCount() >= thePrefs::GetDeadserverRetries() && thePrefs::DeadServer() && !ping_server->IsStaticMember()) {
 281                         RemoveServer(ping_server);
 282                         return;
 283                 }
 284
 285                 srand((unsigned)time(NULL));
 286                 ping_server->SetRealLastPingedTime(tNow); // this is not used to calcualte the next ping, but only to ensure a minimum delay for premature pings
 287                 if (!ping_server->GetCryptPingReplyPending() && (!ping_server->GetLastPingedTime() || (tNow - ping_server->GetLastPingedTime()) >= UDPSERVSTATREASKTIME) && theApp->GetPublicIP() && thePrefs::IsServerCryptLayerUDPEnabled()) {
 288                         // We try a obfsucation ping first and wait 20 seconds for an answer
 289                         // if it doesn't get responsed, we don't count it as error but continue with a normal ping
 290                         ping_server->SetCryptPingReplyPending(true);
 291                         uint32 nPacketLen = 4 + (uint8)(rand() % 16); // max padding 16 bytes
 292                         CScopedArray<byte> pRawPacket(nPacketLen);
 293                         uint32 dwChallenge = (rand() << 17) | (rand() << 2) | (rand() & 0x03);
 294                         if (dwChallenge == 0) {
 295                                 dwChallenge++;
 296                         }
 297
 298                         memcpy(pRawPacket.get(), &dwChallenge, sizeof(uint32));
 299                         for (uint32 i = 4; i < nPacketLen; i++) { // fillng up the remaining bytes with random data
 300                                 pRawPacket[i] = (uint8)rand();
 301                         }
 302
 303                         ping_server->SetChallenge(dwChallenge);
 304                         ping_server->SetLastPinged(tNow);
 305                         ping_server->SetLastPingedTime((tNow - (uint32)UDPSERVSTATREASKTIME) + 20); // give it 20 seconds to respond
 306
 307                         AddDebugLogLineN(logServerUDP, CFormat(wxT(">> Sending OP__GlobServStatReq (obfuscated) to server %s:%u")) % ping_server->GetAddress() % ping_server->GetPort());
 308
 309                         CPacket* packet = new CPacket(pRawPacket[1], nPacketLen - 2, pRawPacket[0]);
 310                         packet->CopyToDataBuffer(0, pRawPacket.get() + 2, nPacketLen - 2);
 311
 312                         theStats::AddUpOverheadServer(packet->GetPacketSize());
 313                         theApp->serverconnect->SendUDPPacket(packet, ping_server, true, true /*raw packet*/, 12 /* Port offset is 12 for obfuscated encryption*/);
 314                 } else if (ping_server->GetCryptPingReplyPending() || theApp->GetPublicIP() == 0 || !thePrefs::IsServerCryptLayerUDPEnabled()){
 315                         // our obfsucation ping request was not answered, so probably the server doesn'T supports obfuscation
 316                         // continue with a normal request
 317                         if (ping_server->GetCryptPingReplyPending() && thePrefs::IsServerCryptLayerUDPEnabled()) {
 318                                 AddDebugLogLineN(logServerUDP, wxT("CryptPing failed for server ") + ping_server->GetListName());
 319                         } else if (thePrefs::IsServerCryptLayerUDPEnabled()) {
 320                                 AddDebugLogLineN(logServerUDP, wxT("CryptPing skipped because our public IP is unknown for server ") + ping_server->GetListName());
 321                         }
 322
 323                         ping_server->SetCryptPingReplyPending(false);
 324
 325                         CPacket* packet = new CPacket(OP_GLOBSERVSTATREQ, 4, OP_EDONKEYPROT);
 326                         uint32 challenge = 0x55AA0000 + (uint16)rand();
 327                         ping_server->SetChallenge(challenge);
 328                         packet->CopyUInt32ToDataBuffer(challenge);
 329                         ping_server->SetLastPinged(tNow);
 330                         ping_server->SetLastPingedTime(tNow - (rand() % HR2S(1)));
 331                         ping_server->AddFailedCount();
 332                         Notify_ServerRefresh(ping_server);
 333                         theStats::AddUpOverheadServer(packet->GetPacketSize());
 334                         theApp->serverconnect->SendUDPPacket(packet, ping_server, true);
 335                 } else {
 336                         wxFAIL;
 337                 }
 338         }
 339 }
 340
 341
 342 void CServerList::RemoveServer(CServer* in_server)
 343 {
 344         if (in_server == theApp->serverconnect->GetCurrentServer()) {
 345                 theApp->ShowAlert(_("You are connected to the server you are trying to delete. please disconnect first."), _("Info"), wxOK);
 346         } else {
 347                 CInternalList::iterator it = std::find(m_servers.begin(), m_servers.end(), in_server);
 348                 if ( it != m_servers.end() ) {
 349                         if (theApp->downloadqueue->GetUDPServer() == in_server) {
 350                                 theApp->downloadqueue->SetUDPServer( 0 );
 351                         }
 352
 353                         NotifyObservers( EventType( EventType::REMOVED, in_server ) );
 354
 355                         if (m_serverpos == it) {
 356                                 ++m_serverpos;
 357                         }
 358                         if (m_statserverpos == it) {
 359                                 ++m_statserverpos;
 360                         }
 361                         m_servers.erase(it);
 362                         theStats::DeleteServer();
 363
 364                         Notify_ServerRemove(in_server);
 365                         delete in_server;
 366                 }
 367         }
 368 }
 369
 370
 371 void CServerList::RemoveAllServers()
 372 {
 373         NotifyObservers( EventType( EventType::CLEARED ) );
 374
 375         theStats::DeleteAllServers();
 376         // no connection, safely remove all servers
 377         while ( !m_servers.empty() ) {
 378                 delete m_servers.back();
 379                 m_servers.pop_back();
 380         }
 381         m_serverpos = m_servers.end();
 382         m_statserverpos = m_servers.end();
 383 }
 384
 385
 386 void CServerList::GetStatus(uint32 &failed, uint32 &user, uint32 &file, uint32 &tuser, uint32 &tfile,float &occ)
 387 {
 388         failed = 0;
 389         user = 0;
 390         file = 0;
 391         tuser=0;
 392         tfile = 0;
 393         occ=0;
 394         uint32 maxusers=0;
 395         uint32 tuserk = 0;
 396
 397         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 398                 const CServer* const curr = *it;
 399                 if( curr->GetFailedCount() ) {
 400                         ++failed;
 401                 } else {
 402                         user += curr->GetUsers();
 403                         file += curr->GetFiles();
 404                 }
 405                 tuser += curr->GetUsers();
 406                 tfile += curr->GetFiles();
 407
 408                 if (curr->GetMaxUsers()) {
 409                         tuserk += curr->GetUsers(); // total users on servers with known maximum
 410                         maxusers+=curr->GetMaxUsers();
 411                 }
 412         }
 413         if (maxusers>0) {
 414                 occ=(float)(tuserk*100)/maxusers;
 415         }
 416 }
 417
 418
 419 void CServerList::GetUserFileStatus(uint32 &user, uint32 &file)
 420 {
 421         user = 0;
 422         file = 0;
 423         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 424                 const CServer* const curr = *it;
 425                 if( !curr->GetFailedCount() ) {
 426                         user += curr->GetUsers();
 427                         file += curr->GetFiles();
 428                 }
 429         }
 430 }
 431
 432
 433 CServerList::~CServerList()
 434 {
 435         if (thePrefs::GetNetworkED2K()) {
 436                 SaveServerMet();
 437         }
 438         while ( !m_servers.empty() ) {
 439                 delete m_servers.back();
 440                 m_servers.pop_back();
 441         }
 442 }
 443
 444
 445 void CServerList::LoadStaticServers( const wxString& filename )
 446 {
 447         if ( !CPath::FileExists( filename ) ) {
 448                 return;
 449         }
 450
 451         wxFileInputStream stream( filename );
 452         wxTextInputStream f(stream);
 453
 454         while ( !stream.Eof() ) {
 455                 wxString line = f.ReadLine();
 456
 457                 // Skip comments
 458                 if ( line.GetChar(0) == '#' || line.GetChar(0) == '/') {
 459                         continue;
 460                 }
 461
 462                 wxStringTokenizer tokens( line, wxT(",") );
 463
 464                 if ( tokens.CountTokens() != 3 ) {
 465                         continue;
 466                 }
 467
 468
 469                 // format is host:port,priority,Name
 470                 wxString addy = tokens.GetNextToken().Strip( wxString::both );
 471                 wxString prio = tokens.GetNextToken().Strip( wxString::both );
 472                 wxString name = tokens.GetNextToken().Strip( wxString::both );
 473
 474                 wxString host = addy.BeforeFirst( wxT(':') );
 475                 wxString port = addy.AfterFirst( wxT(':') );
 476
 477
 478                 int priority = StrToLong( prio );
 479                 if (priority < SRV_PR_MIN || priority > SRV_PR_MAX) {
 480                         priority = SRV_PR_NORMAL;
 481                 }
 482
 483
 484                 // We need a valid name for the list
 485                 if ( name.IsEmpty() ) {
 486                         name = addy;
 487                 }
 488
 489
 490                 // create server object and add it to the list
 491                 CServer* server = new CServer( StrToLong( port ), host );
 492
 493                 server->SetListName( name );
 494                 server->SetIsStaticMember( true );
 495                 server->SetPreference( priority );
 496
 497
 498                 // Try to add the server to the list
 499                 if ( !theApp->AddServer( server ) ) {
 500                         delete server;
 501                         CServer* existing = GetServerByAddress( host, StrToULong( port ) );
 502                         if ( existing) {
 503                                 existing->SetListName( name );
 504                                 existing->SetIsStaticMember( true );
 505                                 existing->SetPreference( priority );
 506
 507                                 Notify_ServerRefresh( existing );
 508                         }
 509                 }
 510         }
 511 }
 512
 513
 514 struct ServerPriorityComparator {
 515         // Return true iff lhs should strictly appear earlier in the list than rhs.
 516         // In this case, we want higher priority servers to appear earlier.
 517         bool operator()(const CServer* lhs, const CServer* rhs) {
 518                 wxASSERT
 519                         (
 520                         rhs->GetPreferences() == SRV_PR_LOW             ||
 521                         rhs->GetPreferences() == SRV_PR_NORMAL  ||
 522                         rhs->GetPreferences() == SRV_PR_HIGH
 523                         );
 524                 switch (lhs->GetPreferences()) {
 525                         case SRV_PR_LOW:
 526                                 return false;
 527                         case SRV_PR_NORMAL:
 528                                 return rhs->GetPreferences() == SRV_PR_LOW;
 529                         case SRV_PR_HIGH:
 530                                 return rhs->GetPreferences() != SRV_PR_HIGH;
 531                         default:
 532                                 wxFAIL;
 533                                 return false;
 534                 }
 535         }
 536 };
 537
 538 void CServerList::Sort()
 539 {
 540         m_servers.sort(ServerPriorityComparator());
 541         // Once the list has been sorted, it doesn't really make sense to continue
 542         // traversing the new order from the old position.  Plus, there's a bug in
 543         // version of libstdc++ before gcc4 such that iterators that were equal to
 544         // end() were left dangling.
 545         m_serverpos = m_servers.begin();
 546         m_statserverpos = m_servers.begin();
 547 }
 548
 549
 550 CServer* CServerList::GetNextServer(bool bOnlyObfuscated)
 551 {
 552         while (bOnlyObfuscated && (m_serverpos != m_servers.end()) && !((*m_serverpos)->SupportsObfuscationTCP() || (*m_serverpos)->SupportsObfuscationUDP())) {
 553                 wxASSERT(*m_serverpos != NULL);
 554                 ++m_serverpos;
 555         }
 556
 557         if (m_serverpos == m_servers.end()) {
 558                 return 0;
 559         } else {
 560                 if (*m_serverpos) {
 561                         return *m_serverpos++;
 562                 } else {
 563                         return 0;
 564                 }
 565         }
 566 }
 567
 568
 569 CServer* CServerList::GetNextStatServer()
 570 {
 571         if (m_statserverpos == m_servers.end()) {
 572                 m_statserverpos = m_servers.begin();
 573         }
 574
 575         if (m_statserverpos == m_servers.end()) {
 576                 return 0;
 577         } else {
 578                 wxASSERT(*m_statserverpos != NULL);
 579                 return *m_statserverpos++;
 580         }
 581 }
 582
 583
 584 CServer* CServerList::GetServerByAddress(const wxString& address, uint16 port) const
 585 {
 586         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 587                 CServer* const s = *it;
 588                 if (port == s->GetPort() && s->GetAddress() == address) {
 589                         return s;
 590                 }
 591         }
 592         return NULL;
 593 }
 594
 595
 596 CServer* CServerList::GetServerByIP(uint32 nIP) const
 597 {
 598         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 599         CServer* const s = *it;
 600                 if (s->GetIP() == nIP)
 601                         return s;
 602         }
 603         return NULL;
 604 }
 605
 606
 607 CServer* CServerList::GetServerByIPTCP(uint32 nIP, uint16 nPort) const
 608 {
 609         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 610         CServer* const s = *it;
 611                 if (s->GetIP() == nIP && s->GetPort() == nPort)
 612                         return s;
 613         }
 614         return NULL;
 615 }
 616
 617 CServer* CServerList::GetServerByIPUDP(uint32 nIP, uint16 nUDPPort, bool bObfuscationPorts) const
 618 {
 619         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 620         CServer* const s =*it;
 621                 if (s->GetIP() == nIP
 622                         && (s->GetPort() == nUDPPort-4
 623                                 || (bObfuscationPorts && s->GetObfuscationPortUDP() == nUDPPort)
 624                                 || s->GetPort() == nUDPPort - 12))
 625                         return s;
 626         }
 627         return NULL;
 628 }
 629
 630 bool CServerList::SaveServerMet()
 631 {
 632         CPath newservermet = CPath(theApp->ConfigDir + wxT("server.met.new"));
 633
 634         CFile servermet( newservermet, CFile::write );
 635         if (!servermet.IsOpened()) {
 636                 AddLogLineM(false,_("Failed to save server.met!"));
 637                 return false;
 638         }
 639
 640
 641         try {
 642                 servermet.WriteUInt8(0xE0);
 643                 servermet.WriteUInt32( m_servers.size() );
 644
 645                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 646                         const CServer* const server = *it;
 647
 648                         uint16 tagcount = 12;
 649                         if (!server->GetListName().IsEmpty()) {
 650                                 ++tagcount;
 651                         }
 652                         if (!server->GetDynIP().IsEmpty()) {
 653                                 ++tagcount;
 654                         }
 655                         if (!server->GetDescription().IsEmpty()) {
 656                                 ++tagcount;
 657                         }
 658                         if (server->GetConnPort() != server->GetPort()) {
 659                                 ++tagcount;
 660                         }
 661
 662                         // For unicoded name, description, and dynip
 663                         if ( !server->GetListName().IsEmpty() ) {
 664                                 ++tagcount;
 665                         }
 666                         if ( !server->GetDynIP().IsEmpty() ) {
 667                                 ++tagcount;
 668                         }
 669                         if ( !server->GetDescription().IsEmpty() ) {
 670                                 ++tagcount;
 671                         }
 672                         if (!server->GetVersion().IsEmpty()) {
 673                                 ++tagcount;
 674                         }
 675
 676                         if (server->GetServerKeyUDP(true)) {
 677                                 ++tagcount;
 678                         }
 679
 680                         if (server->GetServerKeyUDPIP()) {
 681                                 ++tagcount;
 682                         }
 683
 684                         if (server->GetObfuscationPortTCP()) {
 685                                 ++tagcount;
 686                         }
 687
 688                         if (server->GetObfuscationPortUDP()) {
 689                                 ++tagcount;
 690                         }
 691
 692                         servermet.WriteUInt32(server->GetIP());
 693                         servermet.WriteUInt16(server->GetPort());
 694                         servermet.WriteUInt32(tagcount);
 695
 696                         if ( !server->GetListName().IsEmpty() ) {
 697                                 // This is BOM to keep eMule compatibility
 698                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet,  utf8strOptBOM);
 699                                 CTagString( ST_SERVERNAME, server->GetListName()).WriteTagToFile( &servermet );
 700                         }
 701
 702                         if ( !server->GetDynIP().IsEmpty() ) {
 703                                 // This is BOM to keep eMule compatibility
 704                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet, utf8strOptBOM );
 705                                 CTagString( ST_DYNIP, server->GetDynIP()).WriteTagToFile( &servermet );
 706                         }
 707
 708                         if ( !server->GetDescription().IsEmpty() ) {
 709                                 // This is BOM to keep eMule compatibility
 710                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet, utf8strOptBOM );
 711                                 CTagString( ST_DESCRIPTION, server->GetDescription()).WriteTagToFile( &servermet );
 712                         }
 713
 714                         if ( server->GetConnPort() != server->GetPort() ) {
 715                                 CTagString( ST_AUXPORTSLIST,    server->GetAuxPortsList()       ).WriteTagToFile( &servermet );
 716                         }
 717
 718                         CTagInt32( ST_FAIL,       server->GetFailedCount()   ).WriteTagToFile( &servermet );
 719                         CTagInt32( ST_PREFERENCE, server->GetPreferences()   ).WriteTagToFile( &servermet );
 720                         CTagInt32( wxT("users"),  server->GetUsers()         ).WriteTagToFile( &servermet );
 721                         CTagInt32( wxT("files"),  server->GetFiles()         ).WriteTagToFile( &servermet );
 722                         CTagInt32( ST_PING,       server->GetPing()          ).WriteTagToFile( &servermet );
 723                         CTagInt32( ST_LASTPING,   server->GetLastPingedTime()).WriteTagToFile( &servermet );
 724                         CTagInt32( ST_MAXUSERS,   server->GetMaxUsers()      ).WriteTagToFile( &servermet );
 725                         CTagInt32( ST_SOFTFILES,  server->GetSoftFiles()     ).WriteTagToFile( &servermet );
 726                         CTagInt32( ST_HARDFILES,  server->GetHardFiles()     ).WriteTagToFile( &servermet );
 727                         if (!server->GetVersion().IsEmpty()){
 728                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet, utf8strOptBOM );
 729                                 CTagString( ST_VERSION, server->GetVersion() ).WriteTagToFile( &servermet );
 730                         }
 731                         CTagInt32( ST_UDPFLAGS,   server->GetUDPFlags()      ).WriteTagToFile( &servermet );
 732                         CTagInt32( ST_LOWIDUSERS, server->GetLowIDUsers()    ).WriteTagToFile( &servermet );
 733
 734                         if (server->GetServerKeyUDP(true)) {
 735                                 CTagInt32(ST_UDPKEY, server->GetServerKeyUDP(true)).WriteTagToFile( &servermet );;
 736                         }
 737
 738                         if (server->GetServerKeyUDPIP()) {
 739                                 CTagInt32(ST_UDPKEYIP, server->GetServerKeyUDPIP()).WriteTagToFile( &servermet );;;
 740                         }
 741
 742                         if (server->GetObfuscationPortTCP()) {
 743                                 CTagInt16(ST_TCPPORTOBFUSCATION, server->GetObfuscationPortTCP()).WriteTagToFile( &servermet );;;
 744                         }
 745
 746                         if (server->GetObfuscationPortUDP()) {
 747                                 CTagInt16(ST_UDPPORTOBFUSCATION, server->GetObfuscationPortUDP()).WriteTagToFile( &servermet );;;
 748                         }
 749
 750                 }
 751         } catch (const CIOFailureException& e) {
 752                 AddLogLineM(true, wxT("IO failure while writing 'server.met': ") + e.what());
 753                 return false;
 754         }
 755
 756         servermet.Close();
 757         const CPath curservermet = CPath(theApp->ConfigDir + wxT("server.met"));
 758         const CPath oldservermet = CPath(theApp->ConfigDir + wxT("server_met.old"));
 759
 760         if (oldservermet.FileExists()) {
 761                 CPath::RemoveFile(oldservermet);
 762         }
 763
 764         if (curservermet.FileExists()) {
 765                 CPath::RenameFile(curservermet, oldservermet);
 766         }
 767
 768         CPath::RenameFile(newservermet, curservermet);
 769
 770         return true;
 771 }
 772
 773
 774 void CServerList::RemoveDeadServers()
 775 {
 776         if ( thePrefs::DeadServer() ) {
 777                 for ( CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ) {
 778                         CServer* server = *it++;
 779                         if ( server->GetFailedCount() > thePrefs::GetDeadserverRetries() && !server->IsStaticMember()) {
 780                                 RemoveServer(server);
 781                         }
 782                 }
 783         }
 784 }
 785
 786 void CServerList::UpdateServerMetFromURL(const wxString& strURL)
 787 {
 788         if (strURL.Find(wxT("://")) == -1) {
 789                 AddLogLineM(true, _("Invalid URL"));
 790                 return;
 791         }
 792         m_URLUpdate = strURL;
 793         wxString strTempFilename(theApp->ConfigDir + wxT("server.met.download"));
 794         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(strURL, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMet, false, false);
 795         downloader->Create();
 796         downloader->Run();
 797 }
 798
 799
 800 void CServerList::DownloadFinished(uint32 result)
 801 {
 802         if(result == HTTP_Success) {
 803                 const CPath tempFilename = CPath(theApp->ConfigDir + wxT("server.met.download"));
 804
 805                 // curl succeeded. proceed with server.met loading
 806                 LoadServerMet(tempFilename);
 807                 SaveServerMet();
 808
 809                 // So, file is loaded and merged, and also saved
 810                 CPath::RemoveFile(tempFilename);
 811                 AddLogLineN(CFormat(_("Finished downloading the server list from %s")) % m_URLUpdate);
 812         } else if (result == HTTP_Skipped) {
 813                 AddLogLineN(CFormat(_("Skipped download of %s, because requested file is not newer.")) % wxT("server.met"));
 814         } else {
 815                 AddLogLineC(CFormat(_("Failed to download %s from %s")) % wxT("server.met") % m_URLUpdate);
 816         }
 817 }
 818
 819
 820 void CServerList::AutoUpdate()
 821 {
 822
 823         uint8 url_count = theApp->glob_prefs->adresses_list.GetCount();
 824
 825         if (!url_count) {
 826                 AddLogLineM(true, _("No server list address entry in 'addresses.dat' found. Please paste a valid server list address into this file in order to auto-update your server list"));
 827                 return;
 828         }
 829         // Do current URL. Callback function will take care of the others.
 830         while ( current_url_index < url_count ) {
 831                 wxString URI = theApp->glob_prefs->adresses_list[current_url_index];
 832                 // We use wxURL to validate the URI
 833                 if ( wxURL( URI ).GetError() == wxURL_NOERR ) {
 834                         // Ok, got a valid URI
 835                         m_URLUpdate = URI;
 836                         wxString strTempFilename =
 837                                 theApp->ConfigDir + wxT("server_auto.met");
 838                         AddLogLineM(true, CFormat(
 839                                 _("Start downloading server list from %s")) % URI);
 840                         CHTTPDownloadThread *downloader = new CHTTPDownloadThread(
 841                                 URI, strTempFilename, theApp->ConfigDir + wxT("server.met"), HTTP_ServerMetAuto, false, false);
 842                         downloader->Create();
 843                         downloader->Run();
 844
 845                         return;
 846                 } else {
 847                         AddLogLineM(true, CFormat(
 848                                 _("WARNING: invalid URL specified for auto-updating of servers: %s") ) % URI);
 849                 }
 850                 current_url_index++;
 851         }
 852         AddLogLineM(true, _("No valid server.met auto-download url on addresses.dat"));
 853 }
 854
 855
 856 void CServerList::AutoDownloadFinished(uint32 result)
 857 {
 858         if (result == HTTP_Success) {
 859                 CPath tempFilename = CPath(theApp->ConfigDir + wxT("server_auto.met"));
 860
 861                 // curl succeeded. proceed with server.met loading
 862                 LoadServerMet(tempFilename);
 863                 SaveServerMet();
 864
 865                 // So, file is loaded and merged, and also saved
 866                 CPath::RemoveFile(tempFilename);
 867         } else {
 868                 AddLogLineM(true, CFormat(_("Failed to download the server list from %s") ) % m_URLUpdate);
 869         }
 870
 871         ++current_url_index;
 872
 873         if (current_url_index < theApp->glob_prefs->adresses_list.GetCount()) {
 874                 // Next!
 875                 AutoUpdate();
 876         }
 877 }
 878
 879
 880 void CServerList::ObserverAdded( ObserverType* o )
 881 {
 882         CObservableQueue<CServer*>::ObserverAdded( o );
 883
 884         EventType::ValueList ilist;
 885         ilist.reserve( m_servers.size() );
 886         ilist.assign( m_servers.begin(), m_servers.end() );
 887
 888         NotifyObservers( EventType( EventType::INITIAL, &ilist ), o );
 889 }
 890
 891
 892 uint32 CServerList::GetAvgFile() const
 893 {
 894         //Since there is no real way to know how many files are in the kad network,
 895         //I figure to try to use the ED2K network stats to find how many files the
 896         //average user shares..
 897         uint32 totaluser = 0;
 898         uint32 totalfile = 0;
 899         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it){
 900                 const CServer* const curr = *it;
 901                 //If this server has reported Users/Files and doesn't limit it's files too much
 902                 //use this in the calculation..
 903                 if( curr->GetUsers() && curr->GetFiles() && curr->GetSoftFiles() > 1000 ) {
 904                         totaluser += curr->GetUsers();
 905                         totalfile += curr->GetFiles();
 906                 }
 907         }
 908         //If the user count is a little low, don't send back a average..
 909         //I added 50 to the count as many servers do not allow a large amount of files to be shared..
 910         //Therefore the estimate here will be lower then the actual.
 911         //I would love to add a way for the client to send some statistics back so we could see the real
 912         //values here..
 913         if ( totaluser > 500000 ) {
 914                 return (totalfile/totaluser)+50;
 915         } else {
 916                 return 0;
 917         }
 918 }
 919
 920
 921 std::vector<const CServer*> CServerList::CopySnapshot() const
 922 {
 923         std::vector<const CServer*> result;
 924         result.reserve(m_servers.size());
 925         result.assign(m_servers.begin(), m_servers.end());
 926         return result;
 927 }
 928
 929
 930 void CServerList::FilterServers()
 931 {
 932         CInternalList::iterator it = m_servers.begin();
 933         while (it != m_servers.end()) {
 934                 CServer* server = *it++;
 935
 936                 if (server->HasDynIP()) {
 937                         continue;
 938                 }
 939
 940                 if (theApp->ipfilter->IsFiltered(server->GetIP(), true)) {
 941                         if (server == theApp->serverconnect->GetCurrentServer()) {
 942                                 AddLogLineM(true, _("Local server is filtered by the IPFilters, reconnecting to a different server!"));
 943                                 theApp->serverconnect->Disconnect();
 944                                 RemoveServer(server);
 945                                 theApp->serverconnect->ConnectToAnyServer();
 946                         } else {
 947                                 RemoveServer(server);
 948                         }
 949                 }
 950         }
 951 }
 952
 953 void CServerList::CheckForExpiredUDPKeys() {
 954
 955         if (!thePrefs::IsServerCryptLayerUDPEnabled()) {
 956                 return;
 957         }
 958
 959         uint32 cKeysTotal = 0;
 960         uint32 cKeysExpired = 0;
 961         uint32 cPingDelayed = 0;
 962         const uint32 dwIP = theApp->GetPublicIP();
 963         const uint32 tNow = ::GetTickCount();
 964         wxASSERT( dwIP != 0 );
 965
 966         for (CInternalList::const_iterator it = m_servers.begin(); it != m_servers.end(); ++it) {
 967         CServer* pServer = *it;
 968                 if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(true) != 0 && pServer->GetServerKeyUDPIP() != dwIP){
 969                         cKeysTotal++;
 970                         cKeysExpired++;
 971                         if (tNow - pServer->GetRealLastPingedTime() < UDPSERVSTATMINREASKTIME){
 972                                 cPingDelayed++;
 973                                 // next ping: Now + (MinimumDelay - already elapsed time)
 974                                 pServer->SetLastPingedTime((tNow - (uint32)UDPSERVSTATREASKTIME) + (UDPSERVSTATMINREASKTIME - (tNow - pServer->GetRealLastPingedTime())));
 975                         } else {
 976                                 pServer->SetLastPingedTime(0);
 977                         }
 978                 } else if (pServer->SupportsObfuscationUDP() && pServer->GetServerKeyUDP(false) != 0) {
 979                         cKeysTotal++;
 980                 }
 981         }
 982 }
 983 // File_checked_for_headers